Files
gigachad-library/autonomic-systems.html
T

2048 lines
118 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Autonomic systems — GigaChad</title>
<link rel="icon" href="/favicon.ico">
<link rel="stylesheet" href="/style.css?v=1">
<meta property="og:type" content="website">
<meta property="og:title" content="Autonomic systems — GigaChad">
<meta property="og:description" content="The greatest website on the interwebz!">
<meta property="og:image" content="/icons/chads/chad.png">
</head>
<body>
<script>
const setTheme = () => {
const root = document.documentElement
const storage = localStorage.length > 0 ? localStorage : sessionStorage
for (let key in storage) {
if (storage.hasOwnProperty(key)) {
root.style.setProperty(key, storage.getItem(key))
}
}
}
setTheme()
document.addEventListener('visibilitychange', () => { if (!document.hidden) setTheme() })
</script>
<h1>Autonomic systems</h1>
<div style="text-align: center;">
<a href="/"><img class="epic" src="/icons/chads/chad.png"></a>
</div>
<hr>
<p class="nav"><span class="nav-left">Listed under <a href="/ray-peat.html">Ray Peat</a>.</span><span class="nav-right"><a href="/theme.html">Theme</a></span></p>
<p>From the <a href="https://raypeat.com/articles/other/autonomic-systems.shtml" target="_blank">original article</a> in 2006. Author: <a href="https://raypeat.com/" target="_blank">Ray Peat</a>.</p>
<p><em>Historically,
functions such as reason, emotion, and instinct were associated with
particular nervous structures, and there was a reluctance to think that
consciousness, like instinct, could be based on "reflexes." Eventually,
this led to the idea of an autonomous nervous system which produced
emotions and adjusted the body's functions, while the "central nervous
system" was the seat of conscious thought, perception, and behavior.</p>
<p>Our individual
cells have a degree of autonomy, consisting of the ability to sense
their situation, integrate stimuli, and act adaptively. Their behavior
is intelligently adaptive. The cells that make up the nervous system
have this basic capacity for complex adaptive integration, but they
also have the specialized role of serving as links between cells, and
between cells and the environment. </p>
<p>The integration
of the organism is most complete when the energy of each cell is optimal.
The "autonomic nervous system," including nerves that are closely
associated with the diverse organs and tissues, is easiest to understand
as a system for integrating and optimizing energy throughout the organism.</p>
<p>This view
suggests new ways of understanding imbalance in these nervous functions,
and the diseases that develop under the imbalanced conditions--e.g.,
asthma, polycystic ovaries, menopausal symptoms, some skin diseases,
multiple sclerosis, heart disease, and tumors.</p>
<p>Every organ
has its own intrinsic nerve net, and the cortex of the brain adjusts
each system to meet the adaptive needs of the organism.</p>
<p>When every
cell is functioning optimally, and the organism is adapted to its environment,
there is little need for intervention by the "transmitter substances."</em> </p>
<p>
<p>
People
like Walter Cannon and Wilhelm Reich popularized the idea of the autonomic
nervous system, but they were just systematizing ideas that had been
developing since the beginning of the century. Their views were the
context in which Selye’s idea of stress developed.</p>
<p>The
anatomical components of the nervous system that were called the sympathetic
(“fight or flight,” adrenergic) system and the parasympathetic (“vegetative”)
system are still important factors in physiological thinking, and despite
the great complexity that has grown up around them, there is still a
tendency to identify the systems with polarities of mood or emotion.
The idea of polarities is useful, but it easily leads to error.</p>
<p>(The
sympathetic system includes a chain of ganglia along the spine, and
its functions include dilating the pupils and accelerating the heart.
The parasympathetic system is also called the cranio-sacral system,
from the location of its ganglia, and among its functions are slowing
the heart and constricting the pupils. However, despite several decades
of research, the actions of “sympathetic” and “parasympathetic”
nerves in most organs aren’t understood.)</p>
<p>If
the “adrenaline side” of the nervous system is responsible for the
reactions to pain and threat, reactions of fear and rage, then the opposite
side tends to be given attributes such as peace and pleasure, and the
fact that these oppositions are often true has led to a climate in which
the adrenergic reactions are seen as “bad,” and the opposite reactions
as “good.” When adrenalin was identified as an agent of the sympathetic
nervous system, there was a search for the “opposing” agent of the
parasympathetic system. Histamine was an early candidate, before acetylcholine
was discovered to be the main parasympathetic agent. This view of histamine
was fostered by the older idea of “trophic nerves,” which easily
became identified with the parasympathetic system. When acetylcholine
was identified as the transmitter or agent of the parasympathetic system,
it tended to take on many of the qualities, including the “trophic”
functions, that had grown up around the idea of the parasympathetic
system, but the emphasis on acetylcholine led to a general neglect of
the associations of histamine, and the mast cells that produce much
of it, with the autonomic nervous system. (The current trend seems to
be emphasizing a close integration of mast cell function with nervous
function.) Nitric oxide has recently been identified as another
parasympathetic “transmitter.” Nitric oxide and histamine are both
very important factors in degenerative inflammatory diseases, but their
association with the parasympathetic nervous system has given them an
aura of benevolence.</p>
<p>I
think it’s useful to compare the autonomic nervous system with the
pituitary, not just because some of the pituitary hormones are called
“trophic” hormones (e.g., luteotrophic, adrenocorticotrophic), but
because their important adaptive functions can themselves be the cause
of serious problems. An excess of the thyroid stimulating hormone, for
example, causes degeneration and cancer development in the thyroid gland,
and animals deprived of their pituitary gland, but given thyroid, live
longer than intact animals. </p>
<p>If
slaves are starved and beaten frequently, they aren’t very productive,
they don’t live long, and they might rebel. Workers that are healthy
and working for a common goal that they understand are more productive.
Cells that are well energized perform their functions with minimal cues,
but deprived cells that have to be forced to function are likely to
die unexpectedly, or to reproduce inappropriately, or to change their
identity.</p>
<p>Professors
often make a strong impression on their students, but, especially in
technical or scientific fields, they usually do this by controlling
the discourse, so that radical questioning is excluded. What they don’t
know “isn’t knowledge.” Under the pressure of “getting a professional
education,” students appreciate organizing principles and mnemonic
devices, but this gives traditional ways of systematizing knowledge
tremendous power that, in practice, is far more important than mere
experimental results. (Experiments that don’t acknowledge the ruling
metaphors are almost universally considered inadmissable,
unpublishable.)</p>
<p>Some
obvious questions about the autonomic system have been commonly ignored
or minimized by physiologists. If “stress” is the stimulus that
causes the sympathetic system to increase its activity, what is the
stimulus for increased activity of the parasympathetic system? What
accounts for the relative balance between the two sides of the system,
or their imbalance? The fact that the answers aren’t obvious has left
the questions largely to psychiatrists and psychologists. Wilhelm Reich,
who tried to provide answers in terms of developmental interactions
between the organism and its environment, found that the question led
him to investigate psychosomatic disease, sexual repression, cancer,
and fascism, with disastrous results for himself. </p>
<p>Chinese
medicine was familiar with many of the functions of the autonomic nervous
system at a time when western medicine was organized around “the humors.”
It’s easy for contemporary “western” people to see that the “winds”
and the hot and cold principles of Chinese tradition are metaphors,
but they are reluctant to see that their own system has grown up within
very similar traditional metaphoric polarities.</p>
<p>The
successes of even a good metaphor can cause people to neglect details
that could support a more complete and accurate image of reality.</p>
<p>Contemporary
science carries a load of bad metaphors, because the educational system
doesn’t tolerate a critical attitude. Potentially, a good metaphor
(e.g., Vernadsky’s suggestion that an organism is “a whirlwind of
atoms”) could blow away many bad metaphors, but the present organization
of science is tending in the other direction<strong>:</strong> Commercial interests
are creating a culture in which their metaphors are replacing the traditional
science in which there was a certain amount of honest intellectual exploration.
</p>
<p>In
talking about consciousness, sleep, stress, biological rhythms, aging,
and energy, I have often focussed on the efficient use of oxygen for
energy production by the mitochondria, i.e., cellular respiration. Every
situation demands a special kind of adaptation, and each kind of adaptation
requires a special distribution of cellular and organic activity, with
its supporting local respiratory activity.</p>
<p>There
is a lot of local self-regulation in the adapting organism, for example
when the activated tissue produces increased amounts of carbon dioxide,
which dilates blood vessels, delivering more oxygen and nutrients to
the tissue. But the distribution of excitation, and the harmonious balancing
of the organism’s resources and activities, is achieved by the actions
of the cortex of the brain, acting on the subordinate nerve nets, adjusting
many factors relating to energy production and use.</p>
<p>On
the level of the mitochondria, adrenaline and acetylcholine have slightly
different effects. (Metabolic studies with isolated mitochondria are
so remote from the normal cellular condition that their results are
nothing more than a hint of what might be occurring in the cell.) Acetylcholine
appears to shift the proportion of the fuels used (increasing the oxidation
of alpha-ketoglutarate, with the production of carbon dioxide) and increasing
the efficiency of energy conservation (phosphorylation, producing ATP)
so that less oxygen is needed, while adrenaline increases the rate of
oxygen consumption (and succinate oxidation). This would be consistent
with F. Z. Meerson’s conception of the parasympathetic function as
one of the “stress limiting” systems.</p>
<p>On
the level of the whole cell, organ, and organism, the parasympathetic
function limits oxygen consumption in a variety of ways, including the
reduction of blood flow. Acetylcholine, like histamine and serotonin,
activates glycolysis, the conversion of glucose to lactic acid, which
provides energy in the absence of oxygen. </p>
<p>The
effects of a little adrenaline, and a lot of adrenaline, are very different,
with a high concentration of adrenaline decreasing the efficiency of
phosphorylation. In the stressed heart, this effect of excess adrenaline
can be fatal, especially when it is combined with adrenaline’s acceleration
of clotting, liberation of fatty acids, and frequently of calcium, and
constriction of blood vessels. </p>
<p>Seventy
years ago, autonomic control of blood vessels seemed to be a matter
of nerve fibers that constrict them, and other fibers that cause them
to dilate, but that idea hasn’t worked for a long time.</p>
<p>Ever
since I noticed that the students in our physiology lab who tried to
use adrenaline to revive their rats weren’t successful, I have wondered
about the television shows in which adrenaline is given to patients
with heart problems. Under some conditions adrenaline does increase
circulation to the heart, but extreme stress doesn’t seem to be among
those conditions.</p>
<p>Too
much serotonin, histamine, acetylcholine, and polyunsaturated fatty
acids, like too much adrenalin, can cause spasms of the coronary arteries,
along with disturbances of mitochondrial respiration. In stress, these
substances are almost sure to be present in excess. (Anti-serotonin
drugs are effective for a variety of heart problems, and other degenerative
diseases.)</p>
<p>By
increasing the production of lactic acid and the loss of carbon dioxide,
exaggerated nervous stimulation (especially the excess of acetylcholine,
histamine, and serotonin) can cause a variety of problems, including
generalized vasoconstriction and systemic alkalosis, as well as increased
intracellular alkalinity. This metabolic pattern is characteristic
of many kinds of stress, including cancer. (Elsewhere, I have referred
to this pattern as “relative hyperventilation.”) The metabolic effects
probably account for some of the “paradoxical” effects of the autonomic
agents.</p>
<p>When
nutrition and thyroid function, light, atmospheric pressure, and other
conditions are favorable, the autonomic transmitters (e.g., acetylcholine,
histamine, serotonin, adrenalin) and pituitary hormones and other “signal
substances” are kept within safe limits.</p>
<p>Because
the substances released from various cells under the influence of the
autonomic nerves (histamine and serotonin, for example) stimulate cell
division, injuries which produce clots and vascular spasms will also
stimulate the formation of new blood vessels, a process that is essential
for the adaptation of tissues to prolonged stress.</p>
<p>These
stress-induced agents are appropriately included in the “vegetative”
(parasympathetic) nervous system, because they promote vegetation, i.e.,
the proliferation of substance.</p>
<p>Adrenaline,
and the sympathetic nerves, have the opposite function, of restraining
cell division, and they also oppose the pro-inflammatory functions of
those parasympathetic agents.</p>
<p>Estrogen
tends to shift autonomic balance toward the parasympathetic side, away
from the sympathetic/adrenergic. Recalling that stress, hypothyroidism,
and aging increase the activity of aromatase in various tissues, with
local production of estrogen, and that tissue-bound estrogen stays at
a high level in postmenopausal women despite the lower level of estrogen
in the serum, it’s worthwhile looking at the effects of estrogen on
the various components of the so-called autonomic nervous system.</p>
<p>One
injection of estrogen can induce a large increase in the number of sympathetic
nerves in the ovaries. At menopause, a similar “invasion” of sympathetic
nerves occurs. The polycystic ovary (which is even more common after
menopause than before, and some studies have found the condition in
20% of premenopausal women) responds to estrogen by producing nerve
growth factor(s), and growing a large number of new sympathetic nerves.
Although the hyperestrogenism associated with the polycystic ovary syndrome
has many harmful effects, the invasion of the ovary by adrenergic nerves
apparently protects it from the development of cancer. </p>
<p>Parasympathetic
nerves, pituitary hormones and mast cells activate the ovaries. The
number of mast cells in the ovaries is increased by the pituitary hormones
(including the thyroid stimulating hormone), and by estrogen (Jaiswal
and Krishna, 1996). Estrogen is the most potent of these hormones in
causing the cells to release histamine. The overgrowth of the sympathetic
nerves in the polycystic
ovary causes the number and activity of mast cells to decrease, possibly
as a protective adaptation against excessive stimulation from the many
pro-inflammatory factors. The mast cells are needed for the follicles
to rupture, so their suppression prevents ovulation. </p>
<p>The
nervous system is closely involved in controlling the growth of tissues,
and it has been argued (R.E. Kavetsky reviewed the subject in his book,
emphasizing the role of depression in development of cancer) that cancer
results from reduced activity of the sympathetic nerves, or unopposed
action of the parasympathetic system. That stress has a role in cancer
is acknowledged by the scientific establishment, but the nervous system’s
direct involvement in the regulation of cellular metabolism, cell division,
and other processes that are central to the cancerous state is either
flatly denied or simply ignored.</p>
<p>Although
mast cells have been known to be a common component of tumors for many
years, it is only recently that antihistamines and other antiinflammatory
drugs have been recognized as valuable therapies in cancer. The whole
issue of the role of nerves in tumor development and physiology has
been submerged by the mystique of the “intrinsically bad cancer cell.”</p>
<p>In
Alzheimer’s disease, there has been a great investment in the doctrine
that drugs to promote the function of cholinergic (acetylcholine forming)
nerves will restore lost mental function, or at least retard the progression
of the disease. The success of <strong><em>anti</em></strong>cholinergic drugs in
treating several degenerative brain diseases is probably embarrassing
to the companies whose cholinergic-intensifying drugs aren’t very
successful. Conveniently for them, these formerly “anticholinergic”
drugs are now being called anti-excitotoxic or anti-glutamatergic drugs.
There is no serious conflict in the terminology, since the cholinergic
processes (like the serotonergic processes) are closely associated with
excitotoxic nerve damage. The cholinergic drugs will probably be sold
as long as their patents are effective, and then will be quietly forgotten.</p>
<p>The
modern conception of pharmacology, with receptors and transmitters turning
functions on or off, has turned into an unproductive and dangerous scholasticism.
No one will ever successfully count the number of transmitter angels
dancing on the variable sites of the variable receptor molecules. The
functional “meaning” of a receptor or transmitter changes according
to circumstances, and the effect of activating a particular nerve depends
on surrounding conditions, and on preceding conditions. Each cell integrates
stimuli adaptively.</p>
<p>If
no reflex is simply mechanical and innate, then all reflexes are conditional.
(M. Merleau-Ponty argued against the validity of the reflex concept
itself, because of this conditionality.) P. K. Anokhin’s concept of
the “Acceptor of Action” (described in my book, <strong><em>Mind and Tissue</em></strong>)
provides an image in which we can see the “set-points” for the relatively
“autonomic” reflexes as reflections of the general needs of the
organism. The local tissue reflexes, the organ reflexes, the spinal
reflexes, etc., are variable, according to their energetic resources,
and according to the way in which they are organized under the influence
of the cerebral cortex and the environment. </p>
<p>The
reality is more complex than the philosophy of the drug industry imagines,
but the solutions of problems can be much simpler, if we think in terms
of energetic support, rather than the over-concretized interventions
of the pharmacologists. In hypothyroidism, it is common for there to
be an excess of adrenalin/noradrenalin, serotonin, histamine, and some
of the pituitary hormones. Correcting thyroid function can immediately
correct many problems, but especially when the energy deficiency has
caused anatomical adjustments (redistribution of blood vessels and mast
cells, for example) it’s important to make the environment supportive
in as many ways as possible.</p>
<p>In
polycystic ovaries, menopausal symptoms, arthritis, angina pectoris,
multiple sclerosis, some kinds of dementia, migraine, and emphysema,
the relief achieved with a simple improvement of cellular energy can
be rapid and complete. Presumably a similar process of biological reorganization
is involved in the occasional spontaneous regression of tumors. </p>
<p>Although
I don’t think the autonomic nervous system, with its sympathetic and
parasympathetic divisions, exists in the way it has traditionally been
conceived, the idea can be useful if we think of using drugs and other
factors in ways that tend to <strong><em>“quiet an overactive autonomic
nervous system.” </em></strong></p>
<h2>References</h2>
<small>
<p>Am
J Emerg Med 1989 Sep;7(5):485-8. <strong>Coronary artery spasm induced by
intravenous epinephrine overdose.</strong> Karch SB. A 27-year-old man was
accidentally given 2 mg intravenous epinephrine instead of 2 mg naloxone.
He immediately developed chest pain, nausea, and diaphoresis. An ECG
taken shortly after the epinephrine administration showed widespread
ischemia. Forty-five minutes later the tracing still showed an early
repolarization pattern, but ST elevation was less marked and the patient
was asymptomatic. Serum potassium was 3.2 mEq/L and serum catecholamines,
drawn approximately 20 minutes after the epinephrine administration,
were 10 times normal (dopamine, 173 ng/L; epinephrine, 1,628 ng/L; norepinephrine,
1,972 ng/L). There are seven other reports of intravenous epinephrine
overdose in the English literature. Two of the previously reported cases
had 12-lead ECGs within the first hour. In both there was evidence of
transient ischemia similar to that observed in this case. Most of the
patients had symptoms consistent with angina,<strong> and several developed
pulmonary edema. These findings suggest that, in humans, large intravenous
doses of epinephrine are likely to produce coronary artery spasm and
may decrease coronary artery perfusion.</strong></p>
<p>Res
Exp Med (Berl) 1987;187(5):385-93. <strong>Possible interaction of platelets
and adrenaline in the early phase of myocardial infarction.</strong> Seitz
R, Leising H, Liebermann
A, Rohner I, Gerdes H, Egbring R. “<strong>It is known that in most cases
of transmural acute myocardial infarction a platelet clot originates
within a coronary artery. In acute myocardial infarction patients increased
levels of the plasma catecholamines adrenaline and
noradrenaline as well as the platelet release proteins platelet factor
4 and beta-thromboglobulin have been reported.” </strong>
</p>
<p>Anesthesiology
1991 Jun;74(6):973-9. Comment in: Anesthesiology. 1992 Mar;76(3):475. <strong>
Magnesium inhibits the hypertensive but not the
cardiotonic actions of low-dose epinephrine.</strong> Prielipp RC, Zaloga
GP, Butterworth JF 4th, Robertie PG, Dudas LM, Black KW, Royster RL.
Intravenous magnesium supplementation is often used to control cardiac
arrhythmias and coronary artery vasospasm resulting from disturbances
of magnesium homeostasis after coronary artery bypass surgery. Many
such patients also require inotropic drug support of depressed myocardial
function. However, increased serum magnesium concentrations directly
depress cardiac contractility in animals and may interfere with catecholamine
actions. To determine whether small intravenous doses of magnesium sulfate
(MgSO4) interfere with the cardiotonic actions of epinephrine, we examined
the hemodynamic effects of MgSO4 and epinephrine infusion in 17 cardiac
surgical patients on their 1st postoperative day in a prospective, controlled
study. In 11 patients, infusion of MgSO4 (7-mg.kg-1 bolus followed by
10 mg.kg-1.h-1 as a continuous infusion) increased serum magnesium concentrations
by 44% (mean +/- standard error of the mean [SEM] of 0.8 +/- 0.1 to
1.2 +/- 0.1 mM; P less than 0.01) but had no significant effect on heart
rate; mean arterial, central venous, or pulmonary arterial occlusion
pressures; or cardiac output. Epinephrine infusion (30 ng.kg-1.min-1)
significantly increased cardiac index (2.7 +/- 0.1 to 3.1 +/- 0.21.min-1.m-2;
P less than 0.05); this effect was not altered by MgSO4 administration
(n = 11). However, MgSO4 significantly blunted epinephrine's hypertensive
action and prevented a significant increase in mean arterial pressure
during concurrent MgSO4-epinephrine administration. Six placebo control
patients were given two sequential infusions of epinephrine separated
by a placebo infusion to rule out an effect of time on the hemodynamic
response to epinephrine. Mean arterial pressure and cardiac index responses
to epinephrine were identical before and after placebo infusion.
</p>
<p>Jpn
Heart J 1979 Jan;20(1):75-82. <strong>Inhibition of constrictor responses
of dog coronary artery by atropine. A possible effectiveness of atropine
on variant form of angina pectoris.</strong> Sakanashi M, Furukawa T, Horio
Y. A possible effectiveness of atropine on variant form of angina pectoris
was investigated using the left circumflex coronary arterial strips
of dogs. Acetylcholine 10(-5)--10(-3) Gm/ml dose-dependently constricted
the isolated arterial strips during potassium-contracture in 6 cases,
and repetitive applications of acetylcholine could produce the similar
contractions to the control. In 18 strips atropine 10(-6) Gm/ml significantly
depressed the contractions of coronary arteries induced by acetylcholine
10(-5)--10(-3) Gm/ml. In 5 arterial strips atropine 10(-6) Gm/ml <strong>
significantly inhibited norepinephrine-induced responses</strong> of these
arteries, and by 10(-5) Gm/ml further suppression of the responses was
obtained. The <strong>results suggest that atropine may suppress the contractile
responses of the coronary artery induce by
acetylcholine and nonrepinephrine through a
muscarinic-receptor blocking action and simultaneously partly through
an adrenergic alpha-receptor blocking action.</strong>
</p>
<p>Eur
J Clin Pharmacol 1981;20(4):245-50. <strong>Effect of long-term beta-blockade
with alprenolol on platelet function and
fibrinolytic activity in patients with coronary heart disease.</strong> Jurgensen
HJ, Dalsgaard-Nielsen J, Kjoller E, Gormsen J.</p>
<p>C
R Seances Soc Biol Fil 1987;181(3):242-8.<strong> [Adrenaline activates oxidative
phosphorylation of rat liver mitochondria through alpha 1-receptors].</strong>
Breton L, Clot JP, Bouriannes J, Baudry M. We studied the effects and
mode of action of epinephrine on the oxidative phosphorylation of rat
liver mitochondria. With either succinate or beta-hydroxybutyrate as
substrate, i.v. injection of 1.5 microgram/100 g epinephrine increased
the respiratory rates by 30-40% in state 3 (with ADP), and by 20-30%
in state 4 (after ADP phosphorylation), so that the respiratory control
ratio (state 3/state 4) changed little. The respiratory stimulation
by epinephrine was maximal 20 minutes after its injection. The action
of epinephrine on mitochondria was blocked by pretreatment of the animals
with the alpha 1-antagonist prazosin but not by treatment with the beta-antagonist
propranolol. I. v. injection of 10 micrograms/100 g phenylephrine evoked
the same mitochondrial response as epinephrine. I. v. administration
of 50 micrograms/100 g dibutyryl cyclic AMP enhanced glycaemia but did
not affect mitochondrial respiration. Epinephrine therefore has an alpha
1-type of action on mitochondrial oxidative phosphorylation.
</p>
<p>Biochimie
1975;57(6-7):797-802. <strong>Effects of
catecholamines on rat myocardial metabolism. I. Influence of
catecholamines on energy-rich nucleotides and
phosphorylated fraction contents.</strong> Merouze P, Gaudemer Y. 1. The
influence of catecholamines (adrenaline and noradrenaline) on energy
metabolism of the rat myocardium has been studied by incubating slices
of this tissue with these hormones and by following the levels of the
different phosphorylated fractions and adenylic nucleotides. 2. Similar
effects are obtained with both hormones, adrenaline being more effective.
3<strong>. Catecholamines decrease significantly the total amount of phosphate
while Pi content increases during the first 10 minutes of incubation;
labile and residual phosphate contents increase at the beginning of
incubation and decrease to the initial values afterwards. 4. ATP and
ADP levels decrease significantly</strong> with both hormones; however, the
effect of noradrenalin on the ATP level needs a longer time of incubation. <strong>
The ATP/ADP ratios decrease after 5 minutes incubation and the total
adenylic nucleotide content is severely decreased (35 per cent with
adrenalin, after 20 minutes incubation). 5. Similar results have been
obtained with other tissues; these results can explain the decrease
of aerobic metabolism we observed under the same conditions.</strong>
</p>
<p>Eur
J Pharmacol 1982 Jul 30;81(4):569-76<strong>. Actions of
serotonin antagonists on dog coronary artery.</strong> Brazenor RM, Angus
JA. <strong>“Serotonin released from platelets may initiate coronary
vasospasm</strong> in patients with variant angina. If this hypothesis is
correct, serotonin antagonists without constrictor activity may be useful
in this form of angina. We have investigated drugs classified as serotonin
antagonists on dog circumflex coronary artery ring segments in vitro.
Ergotamine, dihydroergotamine,<strong> bromocriptine,
lisuride, ergometrine, ketanserin,
trazodone, cyproheptadine and pizotifen caused
non-competitive antagonism of serotonin concentration-response</strong> curves.
In addition, ketanserin, trazodone, bromocriptine and pizotifen inhibited
noradrenaline responses in concentrations similar to those required
for serotonin antagonism. All drugs with the exception of ketanserin,
cyproheptadine and pizotifen showed some degree of intrinsic constrictor
activity.” “Of the<strong> drugs tested,
ketanserin may be the most useful in variant angina since it is a potent
5HT antagonist, lacks agonist activity and has
alpha-adrenoceptor blocking activity.”</strong></p>
<p>Arch
Mal Coeur Vaiss 1983 Feb;76 Spec No:3-6.<strong> Role of autonomic nervous
system in the pathogenesis of angina pectoris.</strong> Yasue H. “The attacks
of vasospastic angina or coronary spasm can be induced by injection
of epinephrine, cold pressor test, Valsalva maneuver, and exercise.”
“The attacks of vasospastic angina can also be induced by injection
of methacholine, a parasympathomimetic agent, and this reaction is suppressed
by atropine, a parasympathetic blocking agent. Thus,<strong> parasympathetic
nervous system also seems to play a role in the production of
vasospastic angina. The attacks of
vasospastic angina can be easily induced by
adrenergic or parasympathetic stimuli from midnight to early morning
but is</strong> usually not provoked by these stimuli in the daytime. Thus,
there is circadian variation in the reactivity of coronary arteries
to adrenergic or parasympathetic stimuli. There are also weekly, monthly
and yearly variations of the reactivity of coronary arteries to these
stimuli. Thus, <strong>alpha adrenergic or parasympathetic activity is not
the sole factor in the production of
vasospastic angina.</strong> Angina pectoris caused by increased myocardial
oxygen demand is induced by infusion of isoproterenol, a beta adrenergic
stimulant, and is suppressed by propranolol but not by phentolamine.”
</p>
<p>Nippon
Yakurigaku Zasshi 1986 Mar;87(3):281-90. <strong>[Vasoconstrictor responses
of isolated pig coronary arteries].</strong> [Article in Japanese] Ikenoue
K, Kawakita S, Toda N.<strong> “In helical strips of pig coronary arteries,
histamine, serotonin, acetylcholine and a stable analogue of
thromboxane A2 (9, 11-epithio-11, 12-methano
TXA2: s-TXA2) produced a dose-dependent contraction. The histamine-induced
contraction</strong> was suppressed by treatment with chlorpheniramine, suggesting
an involvement of H1 receptors. <strong>Contractile responses to
serotonin were attenuated by not only
ketanserin, an S2 antagonist, but also by
cinanserin and methysergide.</strong>” “Contractile responses to histamine
were potentiated by treatment with low concentrations of serotonin or
s-TXA2. Contractile responses to serotonin were also potentiated by
low concentrations of histamine or s-TXA2. Removal of the endothelium
from pig coronary arterial strips potentiated contractions induced by
serotonin, histamine and norepinephrine. These results suggest that,
in addition to damaged endothelium, <strong>integrating action of endogenous
vasoconstrictors, including histamine,
serotonin, TXA2 and norepinephrine, may play an important role in producing
coronary vasospasm.”</strong></p>
<p>Jpn
Heart J 1987 Sep;28(5):649-61<strong>. The role of parasympathetic nerve
activity in the pathogenesis of coronary
vasospasm.</strong> Suematsu M, Ito Y, Fukuzaki H. To evaluate the role of
the autonomic nervous system, especially the parasympathetic nervous
system, in the initiation mechanism of vasospastic angina pectoris (AP),
the coefficient of R-R interval variation (CV) on the electrocardiogram
(ECG) and plasma catecholamine concentration were measured in 25 patients
with vasospastic AP, 10 patients with effort AP and 12 control subjects.
CV which has been recognized as reflecting parasympathetic nervous system
activity was calculated from 100 consecutive heart beats on the ECG
and represented as the percentage of standard deviation of the R-R interval
per mean R-R interval. Repeated measurements of <strong>plasma
catecholamine concentration revealed higher values at any sampling point
throughout a day in patients with vasospastic AP than those in </strong>
control subjects. A distinctly higher CV was observed at night in the
vasospastic AP group. <strong>This elevated CV was abolished by atropine
sulfate (1.5 mg/day per os). Pilocarpine injection (1.3 mg/10 kg
B.W. subcutaneously) induced a marked increase</strong> in CV that preceded
the occurrence of chest pain and/or ischemic ECG changes in 5 patients
with vasospastic AP. The<strong> increment in CV at 10 min after
pilocarpine administration was greater in
vasospastic AP than in control subjects (p less than 0.05). It is concluded
that enhanced parasympathetic activity may play a role in the initiation
of coronary vasospasm associated with sympathetic hyperactivity.</strong>
</p>
<p>Science
1984 Mar 30;223(4643):1435-7.<strong> Coronary arteries of cardiac patients
are hyperreactive and contain stores of amines: a mechanism for coronary
spasm.</strong> Kalsner S, Richards R. Coronary arteries from hearts of cardiac
patients contain significantly higher concentrations of histamine than
do those from noncardiac patients. The coronary vessels of cardiac patients
are also hyperresponsive to histamine and serotonin. These differences
between groups of patients suggest an explanation for coronary artery
spasm in heart disease.</p>
<p>Fed
Proc 1985 Feb;44(2):321-5. <strong>Coronary artery reactivity in human vessels:
some questions and some answers.</strong> Kalsner S. “It is now clear that
human coronary arteries in vitro contract to acetylcholine but that
relaxation is the only response observed in dog coronary vessels. <strong>
Acetylcholine is as powerful a constrictor of human coronary arteries,
in terms of tension induced, as 5-hydroxytryptamine (5-HT) or histamine
and is a substantially more powerful constrictor than
norepinephrine.</strong> Field stimulation of coronary artery strips caused
a vasoconstriction that was partially antagonized by atropine (3.45
X 10(-6) M).” “Coronary tissue from cardiac patients also contains
stores of 5-HT and histamine, and the histamine levels are substantially
increased above the values in vessels from noncardiac patients. Coronary
artery spasm or contraction<strong> probably can be initiated by diverse
intrinsic and extrinsic influences, including autonomic discharge from
either the parasympathetic or sympathetic nervous system or from histamine
or 5-HT, and probably no one agent or entity is causative in all cases.”</strong>
</p>
<p>Ann
N Y Acad Sci 1969 Oct 14;164(2):517-9. <strong>Induced
carcinogenesis under various influences on the hypothalamus.</strong> Kavetsky
RE, Turkevich NM, Akimova RN, Khayetsky IK, Matveichuck YD. </p>
<p>Kavetsky
RE, (editor) <strong><em>The Neoplastic Process and the Nervous
System,</em></strong>Kiev, 1958.</p>
<p>Ann
N Y Acad Sci 1966 Jan 21;125(3):933-45. <strong>On the
psychophysiological mechanism of the organism's resistance to tumor
growth.</strong> Kavetsky RE, Turkevich NM, Balitsky KP.
</p>
<p>Patol
Fiziol Eksp Ter 1971 Sep-Oct;15(5):3-10. <strong>[Role of disorders in
intra-cellular and neuro-humoral regulation in the development of the
tumor process]. </strong>[Article in Russian] Kavetskii RE, Balitskii KP.
</p>
<p>Mil’man,
M.S., <strong>The sympathetic nervous system and the source of tumors,</strong>
Problems of Oncology IX, 162-173, 1936.</p>
<p>Obstet
Gynecol Surv 1977 May;32(5):267-81. <strong>Estrogen and
endometrial carcinoma. </strong>Knab DR. “1. It has become evident that
the estrogen secreting tumors of the ovary are associated with endometrial
carcinoma, but this association is most easily observed in the postmenopausal
patient where the incidence of carcinoma has been<strong> reported at 10.3%
(1. 02) to 24% (83). 2. The most consistent association of
endometrial carcinoma is with polycystic ovarian disease, where 19 (34),
21 (152), and 25% (150) of young women with
endometrial carcinoma had Stein-Leventhal syndrome (67). </strong>
3. A very significant discovery became known in 1967 when the peripheral
aromatization of delta4 androstenedione to estrone was reported by Kase
(94) and MacDonald (111,112). Since that time we have learned that endometrial
carcinoma patients have an increased peripheral conversion (139) (0.1%
compared to 0.027%), which is similar to that found in obese and aging
patients, by Hemsell, et al (77). This can be 2 to 4 times greater than
the young adult or the patient without cancer.” “Similarly patients
with polycystic ovary disease, hyperthecosis and lipoid cell tumors
of the ovary demonstrate androgen excess with extraglandular conversion
to estrone (2). 4. It has become apparent that the principal estrogen
in the postmenopausal patient is estrone and that the estrone-estradiol
ratio in the serum is higher in postmenopausal women with corpus cancer
than similar patients without cancer (135).” “5. With the lack of
ovarian estrogen there is a relative excess of adrenal testosterone,
dihydrotestosterone and delta4 androstenedione, the available precursors
of extraglandular estrone (1). 6. With the passage of time <strong>it appears
that endometrial carcinoma is associated with hypothalamic &quot;hyperactivity&quot;</strong>
(31)....” </p>
<p>Endocrinology
2000 Mar;141(3):1059-72.<strong> An increased
intraovarian synthesis of nerve growth factor and its low affinity receptor
is a principal component of steroid-induced
polycystic ovary in the rat.</strong> Lara HE, Dissen GA, Leyton V, Paredes
A, Fuenzalida H, Fiedler JL, Ojeda SR. A form of polycystic ovary (PCO)
resembling some aspects of the human PCO syndrome can be induced in
rats by a single injection of estradiol valerate (EV). An increase in
sympathetic outflow to the ovary precedes, by several weeks, the appearance
of cysts, suggesting the involvement of a neurogenic component in the
pathology of this ovarian dysfunction. The present study was carried
out to test the hypotheses that this change in sympathetic tone is related
to an augmented production of ovarian nerve growth factor (NGF), and
that this abnormally elevated production of <strong>NGF contributes to the
formation of ovarian cysts induced by
EV. Injection of the steroid resulted in increased
intraovarian synthesis of NGF</strong> and its low affinity receptor, p75
NGFR. The increase was maximal 30 days after EV, coinciding with the
elevation in sympathetic tone to the ovary and preceding the appearance
of follicular cysts. Intraovarian injections of the retrograde tracer
fluorogold combined with in situ hybridization to detect tyrosine hydroxylase
(TH) messenger RNA-containing neurons in the celiac ganglion revealed
that these changes in NGF/p75 NGFR synthesis are accompanied by selective
activation of noradrenergic neurons projecting to the ovary. The levels
of RBT2 messenger RNA, which encodes a beta-tubulin presumably involved
in slow axonal transport, were markedly elevated, indicating that EV-induced
formation of ovarian cysts is preceded by functional activation ofceliac
ganglion neurons, including those innervating the ovary. Intraovarian
administration of a neutralizing antiserum to NGF in conjunction with
an antisense oligodeoxynucleotide to p75 NGFR, via Alzet osmotic minipumps, <strong>
restored estrous cyclicity and ovulatory capacity in a</strong> majority
of EV-treated rats. These functional changes were accompanied by restoration
of the number of antral follicles per ovary that had been depleted by
EV and a significant reduction in the number of both precystic follicles
and<strong> follicular cysts. The results indicate that the
hyperactivation of ovarian sympathetic nerves seen in
EV-induced PCO is related to an overproduction of
NGF and its low affinity receptor in the gland. They also suggest that
activation of this neurotrophic-neurogenic regulatory loop is a component
of the pathological process by which
EV induces cyst formation and anovulation in rodents. The</strong> possibility
exists that a similar alteration in neurotrophic input to the ovary
contributes to the etiology and/or maintenance of the PCO syndrome in
humans.</p>
<p>Acta
Physiol Hung 1996;84(2):183-90.<strong> Effects of hormones on the number,
distribution and degranulation of mast cells in the ovarian complex
of mice.</strong> Jaiswal K, Krishna A. The changes in the number and degranulation
pattern of mast cells varied with the types of hormonal treatment and
ovarian compartment. <strong>Luteinizing hormone
(LH), follicle stimulating hormone
(FSH), thyroid stimulating hormone
(TSH) and 17-beta estradiol (E2) treatment caused increase (P &lt; 0.05)
in the number of mast cells</strong> in the hilum as compared with the controls.
Increase (P &lt; 0.05) in the number of mast cells in the whole ovarian
complex was observed only following FSH and E2 treatment. All the hormones
used in the present study increased the percentage degranulation of
mast cells in the hilum. However, only LH, FSH and E2 increased the
percentage degranulation of mast cells in other compartments of the
ovary (medulla, bursa and cortex). TSH and ACTH failed to cause any
increase in the percentage degranulation of mast cells in these compartments.
The present findings indicate E2 to be the most potent among the hormones
tested in causing degranulation of mast cells in all ovarian compartments.
</p>
<p>Fertil
Steril 2001 Jun;75(6):1141-7. <strong>Increase in nerve fibers and loss of
mast cells in polycystic and postmenopausal ovaries.</strong> Heider U, Pedal
I, Spanel-Borowski K. OBJECTIVE: To quantify nerve fibers and mast cells
in human ovaries at different functional stages. DESIGN: Retrospective
study. SETTING: Research laboratory of the university. SPECIMEN(S):
8 human ovaries in the follicular (cyclic) phase, 7 polycystic ovaries,
and postmenopausal ovaries with (n=5) or without (n=7) hyperthecosis.
MAIN OUTCOME MEASURE(S): Single- and double immunohistology for the
S100 antigen in glial cells of autonomic nerve fibers, for chymase and
tryptase in mast cells, and for the common leukocyte antigen on leukocytes.
Histometric evaluation was also performed. INTERVENTION(S): None. RESULT(S):
Polycystic ovaries contained significantly more S100-positive nerve
fibers in the corticomedullary region than did cyclic ovaries (mean
+/- SD per 2-mm(2) area, 476 +/- 136 and 224 +/- 133; P&lt;.01). Postmenopausal
ovaries with or without hyperthecosis had the highest density of nerve
fibers. In cyclic and polycystic ovaries, more tryptase-positive mast
cells than chymase-positive mast cells were found in the interstitial
cortex and the medulla. In cyclic ovaries, areas with a moderate density
of nerve fibers contained many mast cells. Hence, <strong>with increasing
nerve fiber density in polycystic ovaries, the number of mast cells
decreased strikingly compared with cyclic ovaries (p&lt;.001). Almost
no mast cells were seen in postmenopausal ovaries</strong> with and without
hyperthecosis. The number of leukocyte antigen-positive leukocytes was
similar in all groups. CONCLUSION(S): The high density of nerve fibers
in polycystic and postmenopausal ovaries, together with a conspicuous
decrease in mast cells, indicates altered neuroimmune communication.
</p>
<p>Endocrinology
1993 Dec;133(6):2696-703. <strong>Ovarian
steroidal response to gonadotropins and
beta-adrenergic stimulation is enhanced in
polycystic ovary syndrome: role of sympathetic
innervation.</strong> Barria A, Leyton V, Ojeda SR, Lara HE. Experimental
induction of a polycystic ovarian syndrome (PCOS) in rodents by the<strong>
administration of a single dose of
estradiol valerate (EV) results in activation of the peripheral sympathetic
neurons that innervate the ovary. This activation is evidenced by an
increased capacity of ovarian nerve terminals to incorporate and release
norepinephrine (NE), an increase in ovarian NE content, and a</strong> decrease
in ovarian beta-adrenergic receptor number in the ovarian compartments
receiving catecholaminergic innervation. The present experiments were
undertaken to examine the functional consequences of this<strong> enhanced
sympathetic outflow to the ovary.</strong> The steroidal responses of the
gland to beta-adrenergic receptor stimulation and hCG were examined
in vitro 60 days after EV administration, i.e. at the time when follicular
cysts are well established. EV-treated rats exhibited <strong>a remarkable
increase in ovarian progesterone and androgen responses to
isoproterenol, a beta-adrenergic receptor
agonist, with no changes in estradiol responsiveness. Basal
estradiol release was, however, 50-fold higher than the highest levels
released from normal ovaries at any phase of the estrous cycle.</strong>
The ovarian progesterone and androgen responses to hCG were enhanced
in EV-treated rats, as were the responses to a combination of isoproterenol
and hCG. Transection of the superior ovarian nerve (SON), which carries
most of the catecholaminergic fibers innervating endocrine ovarian cells,
dramatically reduced the exaggerated responses of all three steroids
to both beta-adrenergic and gonadotropin stimulation. SON transection
also reduced the elevated levels of ovarian NE resulting from EV treatment
and caused up-regulation of beta-adrenoreceptors. Most importantly,
SON transection restored estrous cyclicity and ovulatory capacity. The
results indicate that the increased output of ovarian steroids in PCOS
is at least in part due to an enhanced responsiveness of the gland to
both catecholaminergic and gonadotropin stimulation. The ability of
SON transection to restore a normal response indicates that the alteration
in steroid output results from a deranged activation of selective components
of the noradrenergic innervation to the ovary. These findings support
the concept that <strong>an alteration in the
neurogenic control of the ovary contributes to the etiology of
PCOS.</strong></p>
<p>Wilderness
Environ Med 2001 Spring;12(1):8-12. <strong>Alterations in autonomic nervous
control of heart rate among tourists at 2700 and 3700 m above sea level.</strong>
Kanai M, Nishihara F, Shiga T, Shimada H, Saito S. “RESULTS: Both
HF and LF heart rate variability <strong>decreased according to the elevation
of altitude</strong>.” “CONCLUSIONS: <strong>At 2700 and 3700 m, the activity
of the autonomic nervous system measured by heart rate variability was
decreased</strong> in untrained office workers. The sympathetic nervous system
was dominant to the parasympathetic at 3700 m. These alterations in
the autonomic nervous system might play some role in physical fitness
at high altitudes.”</p>
<p>Acta
Neuroveg (Wien) 1967;30(1):557-63. <strong>[Neuroautonomic reactivity of
the skin during high mountain climate treatment of skin diseases].</strong>
[Article in German] Chlebarov S.</p>
<p>Munch
Med Wochenschr 1966 Mar 18;108(11):589-92. <strong>[Changes of the
neurovegetative reactivity of the skin after Alpine climatic therapy].</strong>
[Article in German] Borelli S, Chlebarov S.</p>
<p>J
Appl Physiol 1978 May;44(5):647-51. <strong>Mechanism of the attenuated cardiac
response to beta-adrenergic stimulation in chronic
hypoxia.</strong> Maher JT, Deniiston JC, Wolfe DL, Cymerman A.<strong> “A blunting
of the chronotropic and inotropic responses of the heart to
beta-adrenergic stimulation occurs following chronic exposure to
hypobaric hypoxia.</strong>” “Neither monoamine oxidase activity nor
norepinephrine level of any region of the heart was altered by chronic
hypoxia. However, a twofold increase (P less than 0.001) <strong>in
catechol O-methyltransferase activity above sea-level values was found
in both the atria and ventricles of the
hypoxic animals.</strong> Thus, the attenuation in cardiac responsiveness
to beta-adrenoceptor stimulation in chronic hypoxia appears unrelated
to the level of vagal activity, but may be attributable to enhanced
enzymatic inactivation of catecholamines.”</p>
<p>Acta
Physiol Scand 1976 Jun;97(2):158-65. <strong>Effects of respiratory alkalosis
and acidosis on myocardial excitation.</strong> Samuelsson RG, Nagy G. In
anesthetized dogs electrocardiogram and monophasic action potentials
(MAPs) were recorded from the right atrium and the right ventricle by
intracardiac suction electrode technique. The animals were subjected,
by means of ventilation with CO2 and hyperventilation, to periods of
respiratory acidosis and respiratory alkalosis, respectively.<strong> Pronounced
respiratory acidosis induced an increased sympathetic activity </strong>
followed by a decrease in heart rate and prolongation of the A-V conduction
time whereas the shape and duration of the atrial and ventricular MAPs
remained unaltered. Arterial hypoxia in combination with pronounced
respiratory acidosis did not influence the MAP durations. Respiratory <strong>
alkalosis resulted in an increased sympathetic influence on the heart
activity</strong> whereas the shape and duration of the atrial and the ventricular
MAPs remained unaffected. <strong>During pronounced hyperventilation with
increasing central venous pressure an increased parasympathetic influence </strong>
on the heart activity with decrease in the heart rate, prolongation
of the A-V conduction time and shortening of the atrial MAP duration
was recorded.</p>
<p>Biull
Eksp Biol Med 1978 Nov;86(11):525-8. <strong>[Effect of
neuromediators on acid-base status].</strong> [Article in Russian] Lazareva
LV, Bazarevich GI, Makarova LV. A relationship between the state of
adrenergic, cholinergic, and serotoninergic systems, on the one hand,
and the acid-alkaline balance of the organism, on the other hand, was
revealed in sharp and chronic experiments on dogs. A surplus of each
of the mediators was accompanied by respiratory alkalosis, and its deficiency--by
combined respiratory and metabolic acidosis.</p>
<p>Can
J Physiol Pharmacol 1987 May;65(5):1078-85. <strong>Pathophysiology of pH
and Ca2+ in bloodstream and brain.</strong> Somjen GG, Allen BW, Balestrino
M, Aitken PG. The highlights of the literature and our work on tetany
and hyperventilation are reviewed. Our studies concern the following:
(1) the changes of [Ca2+] in circulating plasma caused by respiratory
and &quot;metabolic&quot; acidosis and alkalosis; (2) critical plasma
[Ca2+] levels associated with signs of tetany and neuromuscular blockade;
(3) changes in cerebral [Ca2+]o caused by hypo- and hyper-calcaemia,
and the changes in cerebral [Ca2+]o and pHo caused by acute systemic
acidosis and alkalosis; and (4) effects of changing [Ca2+]o and pHo
levels on synaptic transmission in hippocampal formation. Our main conclusions
are (1) changes of plasma [Ca2+] caused by &quot;metabolic&quot; pH
changes are greater than those associated with varying CO2 concentration;
(2) acute systemic [Ca2+] changes are associated with small cerebral
[Ca2+]o changes; (3) the decreases in systemic and cerebral [Ca2+]o
caused by hyperventilation are too small to account for the signs and
symptoms of hypocapnic tetany; (4) moderate decrease of [Ca2+]o depresses
and its increase enhances synaptic transmission in<strong>
hippocampal formation; and (5) H+ ions in
extracellular fluid have a weak depressant effect on neuronal excitability.
CO2 is a strong depressant, which is only partly explained by the acidity
of its solution. CO2 concentration is a significant factor in controlling
cerebral function.</strong></p>
<p>J
Hirnforsch 1991;32(5):659-664. <strong>Normalization of protein synthesis
and the structure of brain dystrophic neurons after the action of
hypoxia, 10% NaCl and organ-specific RNA.</strong> Polezhaev LV, Cherkasova
LV, Vitvitsky VN, Timonin AV N. I. Vavilov Institute of General Genetics,
USSR Academy of Sciences, Moscow. It was shown previously (Polezhaev
and Alexandrova, 1986) that hypoxic hypoxia causes mass (up to 30%)
diffuse dystrophy of brain cortex and hippocamp neurons in rats, disturbances
in the higher nervous activity, reduction of protein, RNA synthesis
in neurons and of DNA synthesis in the whole brain cortex. Transplantation
of embryonic nervous tissue (ENT) in one of the hemispheres normalizes
all the above abnormalities observed in some neurologic and mental diseases
in humans. However, transplantation may entail injuries of parenchyma
and brain blood vessels. This forces researchers to search for another
biological method similar by its action but safer and simpler. ENT transplantation
has a dual action: 1) formation of biologically active substances (BAS)
releasing from the ENT transplant and from the host brain nervous tissue
upon operation; 2) establishment of synaptic connections between the
transplant and host neurons. Previously we (Vitvitsky, 1987) described
the isolation of BAS from rat forebrain in the form of organ-specific
RNA. The latter was injected intraperitoneally several times to post-hypoxic
rats in which 30 min prior to that the blood-brain barrier (BBB) was
opened by injecting intravenously and intraperitoneally 10% NaCl solution
without damaging the host brain. At the beginning 10% NaCl increased
the destruction of brain cortical neurons and then stimulated protein
synthesis in them. RNA injections stimulated the synthesis in cortical
neurons and normalized their structure. Thus, we propose a safe and
simple method for normalization of dystrophic neurons which can be used
after certain improvement for curing neurodegenerative and neuropsychic
diseases in humans. </p>
<p>Group
processes</p>
<p>The
trouble with writing and painting is that they are considered to be
solitary and individualistic activities. In the 20th century, the idea
developed that they were “expressive,” rather than communicative,
as if there could be any sane distinction between those. The result
was that much of 20th century poetry and painting was insane. The products
of insanity aren’t necessarily worthless, but they are less than they
could be. </p>
<p>When
the writer and painter are in close contact with responsive people,
their product is adjusted to, and enriched by, the reactions they evoke. </p>
<p>J
Cardiovasc Pharmacol 1987;10 Suppl 2:S94-8; discussion S99. <strong>The effect
of beta-blockade on platelet function and
fibrinolytic activity.</strong> Winther K. Department of Clinical Chemistry,
Rigshospitalet, Copenhagen, Denmark. Two groups of hypertensives and
a group of migraine sufferers were tested during treatment with the
nonselective beta-blocker propranolol
and the beta 1-selective metoprolol. During treatment with propranolol,
an increased platelet aggregability and a decrease in platelet content
of cyclic AMP were seen when compared with metoprolol treatment. In
addition, propranolol treatment increased the plasma level of adrenaline
as well as the euglobulin clot lysis time. types of monoamine oxidase,
adrenaline </p>
<p>45:
Br J Pharmacol 1982 Feb;75(2):269-86
Coronary
vasoconstrictor and vasodilator actions of arachidonic acid in the
isolated perfused heart of the rat.
Belo
SE, Talesnik J.
The
administration of arachidonic acid (AA) to the isolated perfused heart
of
the
rat usually produced biphasic coronary responses characterized by initial
vasoconstriction
followed by prolonged vasodilatation. However, some responses
were
predominantly vasoconstrictor or vasodilator. The non-steroidal
anti-inflammatory
agents (NSAA) indomethacin (1-5 mg/l) and naproxen (12.5-25
mg/1)
reversibly inhibited both phases of the response induced by AA.
Pretreatment
of animals with indomethacin (5 mg/kg) or naproxen (25 mg/kg)
daily,
resulted in unaltered coronary response to AA. Subsequent addition of
NSAA
to the perfusate produced inhibition of the AA effect. Short infusions
of
acetylsalicylic
acid at low concentrations (2.9 micrograms/ml), dipyridamole
(0.6
micrograms/ml) and sulphinpyrazone (28.7 micrograms/ml) selectively
inhibited
the vasoconstrictor phase of the response to AA. It was confirmed that
metabolic
coronary dilatation induced by cardiostimulation was inhibited by
prolonged
AA administration; this effect was prevented by NSAA pretreatment.
Reactive
hyperaemic responses to short lasting occlusions of coronary inflow
<strong>were
unaffected by NSAA. Linolenic, linoleic,
dihomo-gamma-linolenic and oleic</strong>
<strong>acid
usually produced decreases in coronary flow which were unaffected by
NSAA,</strong>
<strong>dipyridamole
or sulphinpyrazone. Intra-aortic injections of AA,
prostacyclin</strong>
<strong>(PGI2)
and prostaglandin E2 (PGE2) in the intact rat produced a dose-dependent</strong>
<strong>decrease
in blood pressure with the AA response inhibited by
indomethacin. PGI2</strong>
and
PGE2 produced long lasting coronary vasodilatation in the isolated heart.
The
coronary actions of AA appear to be due to its transformation, within
the
easily
accessible vascular wall, into prostaglandin and thromboxane-like
<strong>substances.
We suggest that a vasoconstrictor thromboxane
A2-like substance may</strong>
<strong>be
responsible for coronary vasospasm. Coronary insufficiency may also
result</strong>
<strong>from
an inhibition of compensatory metabolic coronary dilatation by increased</strong>
<strong>synthesis
of PGE2 within the myocardial cell.</strong></p>
<p>42:
Br Heart J 1983 Jan;49(1):20-5
<strong>Platelet
reactivity and its dependence on alpha-adrenergic receptor function
in</strong>
<strong>patients
with ischaemic heart disease.</strong>
Yokoyama
M, Kawashima S, Sakamoto S, Akita H, Okada T, Mizutani T, Fukuzaki H.
We
studied 57 patients admitted to hospital with ischaemic heart disease,
including
nine patients with variant angina, to evaluate platelet reactivity and
its
dependence on alpha-adrenergic receptor function. The threshold
concentration
for biphasic platelet aggregation in response to adrenaline and
adenosine
diphosphate was measured in fresh platelet rich plasma. There were age
related
alterations in platelet responsiveness to adrenaline. In 27 age matched
control
subjects platelets showed adrenaline induced aggregation at a
concentration
higher than 0.1 mumol. The threshold concentrations for adrenaline
and
adenosine diphosphate were 0.91 mumol and 4.68 mumol. In 16 patients
with
acute
infarction, 14 with old infarction, nine with effort angina, and nine
with
rest
angina, mean values of platelet aggregation threshold for both adrenaline
and
adenosine diphosphate were not altered significantly when compared with
control
subjects. In contrast, the values for adrenaline and adenosine
diphosphate
in nine patients with variant angina were 0.012 mumol and 2.24 mumol
and
seven of them showed obvious platelet hyperactivity to adrenaline at
a concentration lower than 0.1 mumol. The threshold concentration for
adrenaline induced aggregation did not correlate with serum cholesterol
and triglyceride
levels.
</p>
<p>Am
Heart J 1985 Jun;109(6):1264-8. Reduction of plasma norepinephrine levels
in response to brief coronary occlusion in experimental dogs. Haneda
T, Arai T, Kanda H, Ikeda J, Takishima T. Although an increased plasma
norepinephrine (NE) level is sometimes observed
during
angina pectoris, it is difficult to say whether sympathetic overflow
is
its
cause. The left anterior descending coronary artery was occluded by
intracoronary
balloon for 3 minutes in 12 closed-chest anesthetized dogs. During
occlusion,
heart rate did not change but aortic pressure slightly decreased.
Occlusion
caused a significant reduction in both NE levels in the aorta (177 +/-
17
to 134 +/- 16 pg/ml, p less than 0.01) and in the great cardiac vein
(GCV)
296
+/- 44 to 249 +/- 44 pg/ml, p less than 0.01). After surgical vagotomy,
the
occlusion
increased NE levels in the aorta (227 +/- 44 to 278 +/- 43 pg/ml, p
less
than 0.01) and in GCV (384 +/- 76 to 444 +/- 81 pg/ml, p less than 0.01),
showing
the release of vagal inhibition. These results may be applicable to
<strong>patients
with transient anterior myocardial
ischemia; if plasma NE increases</strong>
<strong>without
marked hemodynamic changes, it is suggested that the sympathetic</strong>
<strong>overflow
is not a result but a possible cause of the
ischemia.</strong></p>
<p>25:
Exp Mol Pathol 1986 Apr;44(2):138-46
<strong>Intimal
thickening and the distribution of vasomotor nerves in the mechanically</strong>
<strong>injured
dog coronary artery.</strong>
Taguchi
T, Ishii Y, Matsubara F, Tanaka K.
Intimal
injury and atherosclerotic change seem to be causative factors linked
to
spasm
of the coronary artery. Intimal thickening was produced by mechanical
injury
to the endothelium of the canine coronary artery and we investigated
the
distribution
of adrenergic, cholinergic, and peptidergic nerves in the coronary
arteries.
Although adrenergic and cholinergic nerves were not altered in
<strong>density,
neuron specific enolase positive nerve fibers were increased in number</strong>
<strong>in
dogs killed 1 and 3 months after injury. Substance
P-containing fibers were</strong>
<strong>also
increased at 3 months after the induced injury.</strong>
</p>
<p>24:
J Am Coll Cardiol 1986 Jul;8(1 Suppl A):42A-49A
<strong>Mechanisms
of coronary spasm of isolated human
epicardial coronary segments</strong>
<strong>excised
3 to 5 hours after sudden death.</strong>
Vedernikov
YP.
Isolated
segments of epicardial coronary artery with and without severe
atherosclerotic
lesions excised from human hearts 3 to 5 hours after sudden
coronary
death demonstrated spontaneous contractile activity that was dependent
on
the external calcium level and was inhibited by calcium antagonists
and
activation
of beta-adrenoceptors (isoproterenol and high concentrations of
norepinephrine).
Isoproterenol, with a median effective dose (ED50) of 6.3 X
10(-7)
M, relaxed coronary segments that had been precontracted with 30 mM
<strong>potassium.
Stimulation of the alpha-adrenoceptors activated spontaneous</strong>
<strong>contractions
and increased tension. Norepinephrine
ED50 (in the presence of</strong>
<strong>10(-6)
M propranolol) was 2.3 X 10(-7) M, and tension at a maximal concentration</strong>
<strong>of
10(-4) M was 385.4 +/- 51.4 mg. The
ED50 for acetylcholine and histamine, the</strong>
<strong>potent
activators of coronary segment tone and
phasic contractility, was 3.98 X</strong>
10(-7)
and 8.9 X 10(-7) M, respectively; the maximal increase in tension was
1,079.5
+/- 175 (at 10(-4) M) and 1,131.3 +/- 302 mg (at 10(-5) M),
respectively.
Acetylcholine and histamine increased whereas high concentrations
of
norepinephrine failed to inhibit rhythmic activity and tension of coronary
artery
segments with severe atherosclerotic lesions. Membrane electrogenic
mechanisms
and ways of activating the contractile elements of human coronary
artery
smooth muscle are discussed.</p>
<p>Pharmacol
Rev 2000 Dec;52(4):595-638. <strong>The sympathetic
nerve--an integrative interface between two
supersystems: the brain and the immune system.</strong> Elenkov IJ, Wilder
RL, Chrousos GP, Vizi ES. Inflammatory Joint Diseases Section, Arthritis
and Rheumatism Branch, National Institute of Arthritis and Musculoskeletal
and Skin Diseases, National Institutes of Health, Bethesda, Maryland,
USA. The brain and the immune system are the two major adaptive systems
of the body. During an immune response the brain and the immune system
&quot;talk to each other&quot; and this process is essential for maintaining
homeostasis. Two major pathway systems are involved in this cross-talk:
the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous
system (SNS). This overview focuses on the role of SNS in neuroimmune
interactions, an area that has received much less attention than the
role of HPA axis. Evidence accumulated over the last 20 years suggests
that <strong>norepinephrine (NE) fulfills the criteria for
neurotransmitter/neuromodulator in lymphoid organs.</strong> Thus, primary
and secondary lymphoid organs receive extensive sympathetic/noradrenergic
innervation. Under stimulation, NE is released from the sympathetic
nerve terminals in these organs, and the target immune cells express
adrenoreceptors. Through stimulation of these receptors, locally released
NE, or circulating catecholamines such as epinephrine, affect <strong>lymphocyte
traffic, circulation, and proliferation, and modulate
cytokine production and the functional activity of different lymphoid
cells.</strong> Although there exists substantial sympathetic innervation
in the bone marrow, and particularly in the thymus and mucosal tissues,
our knowledge about the effect of the sympathetic neural input on <strong>
hematopoiesis, thymocyte development, and
mucosal immunity</strong> is extremely modest. In addition, recent evidence
is discussed that <strong>NE and epinephrine, through stimulation of the
beta(2)-adrenoreceptor-cAMP-protein
kinase A pathway, inhibit the production of type
1/proinflammatory cytokines,</strong> such as interleukin (IL-12), tumor
necrosis factor-alpha, and interferon-gamma by antigen-presenting cells
and T helper (Th) 1 cells, whereas they <strong>stimulate the production
of type 2/anti-inflammatory cytokines such as IL-10</strong> and transforming
growth factor-beta. Through this<strong> mechanism, systemically, endogenous
catecholamines may cause a selective suppression of
Th1 responses and cellular immunity, and a
Th2 shift toward dominance of humoral immunity. On the other hand, in
certain local responses, and under certain conditions,
catecholamines may actually boost regional immune</strong> responses, through
induction of IL-1, tumor necrosis factor-alpha, and primarily IL-8 production.
Thus, the activation of SNS during an immune response might be<strong> aimed
to localize the inflammatory response, through induction of
neutrophil accumulation and stimulation of more specific
humoral immune responses, although systemically it may suppress
Th1 responses, and, thus protect the organism from the detrimental effects
of proinflammatory cytokines and other products of activated macrophages.</strong>
The above-mentioned immunomodulatory effects of catecholamines and the
role of SNS are also discussed in the context of their clinical implication
in certain <strong>infections, major injury and sepsis,
autoimmunity, chronic pain and fatigue syndromes, and tumor growth.</strong>
Finally, the pharmacological manipulation of the sympathetic-immune
interface is reviewed with focus on new therapeutic strategies using
selective alpha(2)- and beta(2)-adrenoreceptor agonists and antagonists
and inhibitors of phosphodiesterase type IV in the treatment of experimental
models of autoimmune diseases, fibromyalgia, and chronic fatigue syndrome.
</p>
<p>Am
J Physiol Cell Physiol 2000 Nov;279(5):C1665-74.<strong>
beta-adrenergic receptor/cAMP-mediated signaling and
apoptosis of S49 lymphoma cells.</strong> Yan L, Herrmann V, Hofer JK, Insel
PA. Department of Pharmacology, University of California, San Diego,
La Jolla, California 92093-0636, USA.<strong>
beta-Adrenergic receptor (betaAR) activation and/or increases in
cAMP regulate growth and proliferation of a variety of cells and, in
some cells, promote cell death. In the current studies we addressed
the mechanism of this growth reduction </strong>
by examining betaAR-mediated effects in the murine T-lymphoma cell line
S49. Wild-type S49 cells, derived from immature thymocytes (CD4(+)/CD8(+))
undergo growth arrest and subsequent death when treated with agents
that increase cAMP levels (e.g., betaAR agonists, 8-bromo-cAMP, cholera
toxin, forskolin). Morphological and biochemical criteria indicate that
this cell death is a result of apoptosis. In cyc(-) and kin(-) S49 cells,
which lack G(s)alpha and functional protein kinase A (PKA), respectively,
betaAR activation of G(s)alpha and cAMP action via PKA are critical
steps in this apoptotic pathway. S49 cells that overexpress Bcl-2 are
resistant to cAMP-induced apoptosis. We conclude that betaAR activation
induces apoptosis in immature T lymphocytes via G(s)alpha and PKA, while
overexpression of Bcl-2 prevents cell death. betaAR/cAMP/PKA-mediated
apoptosis may provide a means to control proliferation of immature T
cells in vivo.</p>
<p>Carcinogenesis
2001 Mar;22(3):473-9. <strong>Beta-adrenergic growth regulation of human
cancer cell lines derived from pancreatic
ductal carcinomas.</strong> Weddle DL, Tithoff P, Williams M, Schuller HM.
Carcinogenesis and Developmental Therapeutics Program, College of Veterinary
Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996,
USA. Exocrine ductal carcinoma of the pancreas has been associated with
smoking, and the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone
(NNK) causes this cancer type in laboratory rodents. Current knowledge
on the growth regulation of this malignancy is extremely limited. Recent
studies have shown overexpression of cyclooxygenase 2 (COX 2) and 5-lipoxygenase
(5-lipox) in exocrine pancreatic carcinomas, <strong>suggesting a potential
role of the arachidonic acid (AA) cascade in the regulation of this
cancer type. In support of this interpretation, our data show high basal
levels of AA release in two human cell lines derived from exocrine
ductal pancreatic carcinomas.</strong> Both cell lines expressed m-RNA for
beta2-adrenergic receptors and beta1-adrenergic receptors. Radio-receptor
assays showed that beta2-adrenergic receptors predominated over beta1-adrenergic
receptors. beta2-Adrenergic antagonist ICI118,551 <strong>significantly reduced
basal AA release and DNA synthesis</strong> when the cells were maintained
in complete medium. DNA synthesis of the cell line (Panc-1) with an
activating point mutation in codon 12 of the ki-ras gene was significantly
stimulated by NNK when cells were maintained in complete medium and
this <strong>response was inhibited by the
beta-blocker ICI118,551, the COX-inhibitor aspirin, or the
5-lipox-inhibitor MK-886.</strong> The cell line without ras mutations (BXPC-3)
did not show a significant response to NNK in complete medium. When
the assays were conducted in serum-free medium, both cell lines demonstrated
increased DNA synthesis in response to NNK, an effect inhibited by the
beta2-blocker, aspirin, or MK-886. Panc-1 cells were more sensitive
to the stimulating effects of NNK and less responsive to the inhibitors
than BXPC-3 cells. Our findings are in accord with a recent report which
has identified NNK as a beta-adrenergic agonist and suggest beta-adrenergic,
AA-dependent regulatory pathways in pancreatic cancer as a novel target
for cancer intervention strategies. </p>
<p>Shock
2000 Jul;14(1):60-7. Terbutaline prevents circulatory failure and mitigates
mortality in rodents with endotoxemia. Wu CC, Liao MH, Chen SJ, Chou
TC, Chen A, Yen MH. Department of Pharmacology, National Defense Medical
Center, Taipei, ROC, Taiwan. Septic shock is characterized by a decrease
in systemic vascular resistance. Nevertheless, regional increases in
vascular resistance can occur that may<strong> predispose mammals to organ
dysfunction, including the acute respiratory</strong> distress syndrome.
In the host infected by endotoxin (lipopolysaccharide, LPS), the expression
and release of proinflammatory tumor necrosis factor-alpha (TNFalpha)
rapidly increases, and this cytokine production is regulated by agents
elevating cyclic AMP. In this report, we present evidence that<strong>
terbutaline, a beta2-agonist, inhibits
TNFalpha production and enhances interleukin-10 (IL-10) release in the
anesthetized rat treated with LPS. In addition, an overproduction of
nitric oxide (NO, examined by its metabolites nitrite/nitrate) by
inducible NO synthase (iNOS, examined by western blot analysis) is attenuated
by pretreatment of LPS rats with terbutaline. Overall,</strong> pretreatment
of rats with terbutaline attenuates the delayed hypotension and prevents
vascular hyporeactivity to norepinephrine. In addition, pretreatment
of mice with terbutaline also improves the survival in a model of severe
endotoxemia. The infiltration of polymorphonuclear neutrophils into
organs (e.g., lung and liver) from the surviving LPS mice treated with
terbutaline was reduced almost to that seen in the normal controls.
These findings suggest that the inhibition of TNFalpha and NO (via iNOS)
production as well as the increment of IL-10 production contribute to
the beneficial effect of terbutaline in animals with endotoxic shock.</p>
<p>Ann
Endocrinol (Paris) 1977;38(6):421-6. [Hyperestrogenism in the woman
during the reproductive period]. [Article in French] Kuttenn F.
</p>
<p>Br
J Obstet Gynaecol 1976 Aug;83(8):593-602. Polycystic ovarian disease.
Duignan NM.<strong> Sex hormone binding globulin
(SHBG) capacity was reduced in 9 of 31 patients with
polycystic ovarian (PCO) disease and the mean level in
PCO patients was significantly less (p less than 0.001) than normal.
Serum testosterone levels</strong> were elevated in 21 of 32 PCO patients
and the mean level was significantly elevated (p less than 0.001). Serum
androstenedione values were raised in 17 of 31 patients and the mean
value was also significantly raised (p less than 0.001). Serum dehydroepiandrosterone
sulphate (DHAS) concentrations were elevated in only 2 of 14 patients.
Urinary 17-oxo and 17-oxogenic steroids were normal in all patients
studied. Basal follicle-stimulating hormone (FSH) and luteinizing hormone
(LH) levels were normal but LH release following injection of luteinizing
hormone-releasing hormone (LH-RH) was enhanced. A highly significant
negative correlation (r=--0.449; p less than 0.01) was found between
the logarithm of testosterone and the logarithm of LH levels. Serum
prolactin concentrations were elevated in 4 of 21 PCO patients. Thyroid-stimulating
hormone (TSH) values were normal. Eighteen of 20 patients ovulated following
treatment with clomiphene and nine became pregnant. Five of 12 of patients
treated with oestrogen/progesterone preparations noticed an improvement
in their hirsutism. It is<strong> suggested that the normal cyclical release
of LH is inhibited in PCO </strong>disease by a negative feedback by androgens
to the hypothalamus or the pituitary, and that wedge resection should
be reserved for patients in whom other forms of treatment have failed.</p>
<p>Nouv
Presse Med 1976 Apr 10;5(15):975-9. [Secretion of gonadotropins during
sleep. Changes during secondary amenorrheas]. [Article in French] Passouant
P, Crastes de Paulet A, Descomps B, Besset A, Billiard M. 4 females
with secondary amenorrheas underwent sleep polygraphic recordings together
with blood samples for measurements of LH, FSH and GH, 3 normal
females served as controls. Among normal subjects LH and FSH secretion
showed a pulsating pattern around the time of ovulation, appearing as
secretory episodes throughout the night, without any relationship with
sleep stages. In amenorrheas, 3 types of abnormalities could be identified:
the first was a lack<strong> of secretory episodes of
LH and FSH associated with an abnormal pattern of
GH (9 subjects). The second was an
hypersecretion of LH and a decrease of
FSH secretion together with a normal secretion of
GH in 4 subjects with a Stein-Leventhal syndrome. The last one was an
hypersecretion of LH and FSH</strong> together with a normal pattern of GH
in a subject with an early menopause. These results are discussed according
to the present data on the part of neurotransmission in the regulation
of ovulation and the 2 types of sleep. Furthermore secretory abnormalities
of LH and FSH together with a disconnection between GH secretion and
the stages of sleep lead to question the possibility of interrelationships
in the secretory mechanisms of these different hormones.
</p>
<p>Cancer
1997 Feb 1;79(3):494-9. Comment in: Cancer. 1997 Oct 1;80(7):1360-2.
Association of Stein-Leventhal syndrome with the incidence of postmenopausal
breast carcinoma in a large prospective study of women in Iowa. Anderson
KE, Sellers TA, Chen PL, Rich SS, Hong CP, Folsom AR. Division of Epidemiology,
School of Public Health, University of Minnesota, Minneapolis, USA.
BACKGROUND: The Stein-Leventhal syndrome (SLS), first described in 1935,
is characterized by infertility, hyperandrogenization, and obesity.
Because this phenotype represents an aggregation of risk factors for
postmenopausal breast carcinoma, and because in general, a hormonal
imbalance underlies the disorder, the authors examined the association
between self-reported SLS and breast carcinoma incidence in a cohort
of 34,835 cancer-free women assembled in 1986 and followed through 1992.
METHODS: All participants were between the ages of 55 and 69 and held
a valid Iowa driver's license. A total of 472 women in the cohort (1.35%)
reported a history of SLS at baseline. Incident cases of breast carcinoma
were identified annually using the State Health Registry of Iowa. Data
were analyzed using Cox proportional hazards regression. RESULTS: During
the follow-up period, there were 883 incident breast carcinomas, 14
among women reporting a history of SLS. Women with SLS were more likely
than women without SLS to report fertility problems and menstrual irregularities,
but there were no significant differences observed regarding body mass
index (BMI). Although women with SLS were 1.8 times as likely to report
benign breast disease than women without SLS (P &lt; 0.01), they were
not more likely to develop breast carcinoma (relative risk [RR] = 1.2;
95% confidence interval [CI] = 0.7-2). Adjustment for age at menarche,
age at menopause, parity, oral contraceptive use, BMI, waist-to-hip
ratio, and family history of breast carcinoma lowered the RR to 1 (95%
CI = 0.6-1.9. CONCLUSIONS: Despite the high risk profiles of some women
with SLS, these results do not suggest that the syndrome per se is associated
with an increased risk of postmenopausal breast carcinoma.</p>
<p>Am
J Epidemiol 1991 Oct 15;134(8):818-24. Comment in: Am J Epidemiol.
1992 Aug 1;136(3):372-3. Polycystic ovaries and the risk of breast cancer.
Gammon MD, Thompson WD. Division of Epidemiology, Columbia University
School of Public Health, New York, NY. Data from a case-control study
that was conducted between 1980 and 1982 were analyzed to investigate
the possible association between polycystic ovaries and the risk of
breast cancer. The multicenter, population-based study included in-home
interviews with 4,730 women with breast cancer and 4,688 control women<strong>
aged 20-54 years. The age-adjusted odds ratio for breast cancer among
women with a self-reported history of physician-diagnosed
polycystic ovaries was 0.52 (95% confidence interval 0.32-0.87). The
inverse association was not an artifact of infertility, age at first
birth, or surgical menopause. Because women with this syndrome have
abnormal levels of certain endogenous hormones, the observation of a
low risk of breast cancer in this group may provide new insights into
hormonal influences on breast cancer.</strong></p>
<p>Clin
Endocrinol (Oxf) 1996 Mar;44(3):269-76. Polycystic ovaries in pre and
post-menopausal women. Birdsall MA, Farquhar CM. Department of Obstetrics
and Gynaecology, National Women's Hospital, Auckland, New Zealand.<strong>
OBJECTIVE: Polycystic ovaries have been diagnosed in more than 20% of
premenopausal women using ultrasound. The aim of this study was to determine
whether polycystic ovaries exist in post-menopausal women. DESIGN: Two
groups of</strong> women were studied; group 1 consisted of 18 post-menopausal
volunteers and group 2 comprised 142 women, 94 of whom were post-menopausal
who had recently undergone coronary angiography. MEASUREMENTS: Transabdominal
and transvaginal ultrasound scans were performed and measurements made
of uterine area, endometrial thickness and ovarian volume. The morphological
appearance of the ovaries was also noted. Fasting blood samples were
taken. Medical and menstrual questionnaires were completed. RESULTS:
Polycystic ovaries were found in 8/18<strong> (44%) of group 1 and 60/142
(42%) in group 2. Polycystic ovaries were detected in 35/94 (37%) of
the post-menopausal women in group 2. Post-menopausal women with
polycystic ovaries had larger ovaries containing more follicles compared
with post-menopausal women with normal ovaries. Post-menopausal women
with</strong> polycystic ovaries had higher serum concentrations of testosterone
and triglycerides than had post-menopausal women with normal ovaries.
CONCLUSIONS: Polycystic ovaries can be detected in post-menopausal women
and have some of the same endocrine abnormalities which are evident
in premenopausal women with polycystic ovaries, that is, raised serum
concentrations of testosterone and triglycerides.
</p>
<p>Cancer
Causes Control 1996 Nov;7(6):605-25. Comment in: Cancer Causes
Control. 1996 Nov;7(6):569-71. Nutrition, hormones, and breast cancer:
is insulin the missing link? Kaaks R. International Agency for Research
on Cancer, Lyon, France. Breast cancer incidence rates are high in societies
with a Western lifestyle characterized by low levels of physical activity,
and by an energy-dense diet rich in total and saturated fat and refined
carbohydrates. Epidemiologic studies, so far mostly on postmenopausal
women, have shown that breast cancer risk is increased in hyperandrogenic
women, with decreased levels of plasma sex-hormone binding globulin,
and with increased levels of testosterone and of free estrogens. This
paper describes the role of hyperinsulinemia as a hysiologic link between
nutritional lifestyle factors, obesity, and the development of a hyperandrogenic
endocrine profile, and reviews evidence that may or may not support
the theory that chronic hyperinsulinemia is an underlying cause of breast
cancer. An hypothesis is presented, stipulating that breast cancer risk
is increased not only in hyperandrogenic postmenopausal women, but also
in premenopausal women with mild hyperandrogenism and normal (ovulatory)
menstrual cycles. The author suggests further investigation as to whether
there is a positive association between risk of breast cancer before
menopause and ubclinical forms of the polycystic ovary syndrome (PCOS),
and to what extent iet and physical activity during childhood, by modulating
the degree of insulin esistance during adolescence, may or may not be
determinants of a PCO-like hyperandrogenic endocrine profile persisting
into adulthood.</p>
<p>Akush
Ginekol (Mosk) 1990 Sep;(9):61-3. [The therapeutic effect of parlodel
in the polycystic ovary syndrome]. [Article in Russian] Soboleva EL,
Komarov EK, Potin VV, Svechnikova FA. Parlodel (2.5-50 mg/day) has been
given for 1 to 7 days to 33 patients with the polycystic ovary syndrome
(POS). The ovulatory menstrual cycle returned in 10 (30%) patients and
4 of them conceived. Pretreatment cycle disturbance persisted in 6 (18%)
patients. <strong>Parlodel reduced mid-follicular mean blood
LH levels</strong> to values of normal women. Some decrease in blood testosterone
levels occurred only in the second phase of the cycle. Estradiol test
in 6 patients showed normal positive and negative feedbacks in the hypothalamic-pituitary-ovarian
axis. Parlodel treatment reduced basal and estradiol stimulated pituitary
gonadotropin secretion. It is suggested that parlodel may be used in
ovulation induction in a proportion of POS patients.
</p>
<p>polycystic
menopausal sympathetic
estrogen parasympathetic, antimitochondrial, both can have a protective
function, though in excess the inhibition itself is toxic.</p>
<p>
</p>
<p>Mast
cells: hair growth, angiogenesis, cancer, MS, asthma. Nervous control
of insulin,7: </p>
<p>Am
J Obstet Gynecol 1993 Nov;169(5):1223-6. Comment in: Am J Obstet
Gynecol. 1994 Dec;171(6):1673 <strong>Excessive
estradiol secretion in polycystic ovarian disease.</strong> Benjamin F, Toles
AW, Seltzer VL, Deutsch S. Department of Obstetrics and Gynecology,
Queens Hospital Center, Jamaica, NY 11432. Polycystic ovarian disease
is both a hyperestrogenic and a hyperandrogenic syndrome, and all studies
have shown that hyperestrogenemia is the result of an elevation of estrone
with plasma estradiol levels in the normal follicular range. Because
a literature search failed to reveal any report of polycystic ovarian
disease with significantly elevated estradiol levels, we report a case
in which the plasma estradiol was so massively elevated as to mimic
an estrogen-producing neoplasm. This case also suggests that although
polycystic ovarian disease is a very rare cause of such excessive estradiol
production, it should be included in the differential diagnosis of estrogen-producing
neoplasms.</p>
<p>Nephron 1983;33(4):253-6. <strong>Influence of
inhibitor of glucose utilization on the blood platelet function.</strong>
Tison P, Kubisz P, Cernacek P, Dzurik R. The <strong>inhibition of
glycolysis</strong> by an inhibitor of glucose utilization isolated from
urine of the uremic subjects reflects in: (1) decreased platelet<strong>
aggregation induced by adenosine diphosphate, adrenaline, or collagen,</strong>
respectively; (2) decreased platelet factor 4 release induced by the
same inductors; (3) decreased availability of platelet factor 3, and
(4) inhibition of retraction of reptilase clot. It is concluded that
the inhibition of glycolysis by 'inhibitor of glucose utilization' contributes
to the functional changes of platelets and thus to the alteration of
hemostasis in uremic patients.</p>
<p>Energy:
vasodilate, bronchoconstrict, secrete/leak, swell, grow, tumefy. Invasion
by sympathetic balances the chronic stimulation by mast cells, platelets,
pituitary hormones, locally formed estrogen, and the other mediators
of stress.</p>
<p>Res
Exp Med (Berl) 1987;187(5):385-93. <strong>Possible interaction of platelets
and adrenaline in the early phase of myocardial infarction.</strong> Seitz
R, Leising H, Liebermann A, Rohner
I, Gerdes H, Egbring R. <strong>It is known that in most cases of
transmural acute myocardial infarction a platelet clot originates within
a coronary artery. In acute myocardial infarction patients increased
levels of the plasma catecholamines adrenaline and
noradrenaline as well as the platelet release proteins platelet factor
4 and beta-thromboglobulin have been reported. </strong>
In this study, significantly higher values were found of platelet factor
4 (P less than 0.0001) and beta-thromboglobulin (P less than 0.002)
in 17 acute myocardial infarction patients as compared to 17 control
patients (on intensive care due to non-cardiac disorders), while the
plasma levels of adrenaline and noradrenaline were not different. Positive
correlations were obtained between the two catecholamines and the platelet
products in the control group and between adrenaline and both platelet
factor 4 (r = 0.715, P less than 0.01) and beta-thromboglobulin (r =
0.547, P less than 0.05) in the acute myocardial infarction patients.
The data suggest that a stimulation of the platelets by adrenaline may
facilitate in vitro activation during sampling in patients with high
catecholamine load. On the other hand, a &quot;preactivation&quot; of
the platelets by an increase of adrenaline might be of significance
for thrombus formation in acute myocardial infarction.</p>
<p>Anesthesiology
1991 Jun;74(6):973-9. Comment in: Anesthesiology. 1992 Mar;76(3):475.
Magnesium inhibits the hypertensive but not the cardiotonic actions
of low-dose epinephrine. Prielipp RC, Zaloga GP, Butterworth JF 4th,
Robertie PG, Dudas LM, Black KW, Royster RL. Intravenous magnesium supplementation
is often used to control cardiac arrhythmias and coronary artery vasospasm
resulting from disturbances of magnesium homeostasis after coronary
artery bypass surgery. Many such patients also require inotropic drug
support of depressed myocardial function. However, increased serum magnesium
concentrations directly depress cardiac contractility in animals and
may interfere with catecholamine actions. To determine whether small
intravenous doses of magnesium sulfate (MgSO4) interfere with the cardiotonic
actions of epinephrine, we examined the hemodynamic effects of MgSO4
and epinephrine infusion in 17 cardiac surgical patients on their 1st
postoperative day in a prospective, controlled study. In 11 patients,
infusion of MgSO4 (7-mg.kg-1 bolus followed by 10 mg.kg-1.h-1 as a continuous
infusion) increased serum magnesium concentrations by 44% (mean +/-
standard error of the mean [SEM] of 0.8 +/- 0.1 to 1.2 +/- 0.1 mM; P
less than 0.01) but had no significant effect on heart rate; mean arterial,
central venous, or pulmonary arterial occlusion pressures; or cardiac
output. Epinephrine infusion (30 ng.kg-1.min-1) significantly increased
cardiac index (2.7 +/- 0.1 to 3.1 +/- 0.21.min-1.m-2; P less than 0.05);
this effect was not altered by MgSO4 administration (n = 11). However,
MgSO4 significantly blunted epinephrine's hypertensive action and prevented
a significant increase in mean arterial pressure during concurrent MgSO4-epinephrine
administration. Six placebo control patients were given two sequential
infusions of epinephrine separated by a placebo infusion to rule out
an effect of time on the hemodynamic response to epinephrine. Mean arterial
pressure and cardiac index responses to epinephrine were identical before
and after placebo infusion.(</p>
<p>Jpn
Heart J 1979 Jan;20(1):75-82. <strong>Inhibition of constrictor responses
of dog coronary artery by atropine. A possible effectiveness of atropine
on variant form of angina pectoris.</strong> Sakanashi M, Furukawa T, Horio
Y. A possible effectiveness of atropine on variant form of angina pectoris
was investigated using the left circumflex coronary arterial strips
of dogs. Acetylcholine 10(-5)--10(-3) Gm/ml dose-dependently constricted
the isolated arterial strips during potassium-contracture in 6 cases,
and repetitive applications of acetylcholine could produce the similar
contractions to the control. In 18 strips atropine 10(-6) Gm/ml significantly
depressed the contractions of coronary arteries induced by acetylcholine
10(-5)--10(-3) Gm/ml. In 5 arterial strips atropine 10(-6) Gm/ml <strong>
significantly inhibited norepinephrine-induced responses</strong> of these
arteries, and by 10(-5) Gm/ml further suppression of the responses was
obtained. The <strong>results suggest that atropine may suppress the contractile
responses of the coronary artery induce by
acetylcholine and nonrepinephrine through a
muscarinic-receptor blocking action and simultaneously partly through
an adrenergic alpha-receptor blocking action.</strong></p>
<p>Eur
J Clin Pharmacol 1981;20(4):245-50. <strong>Effect of long-term beta-blockade
with alprenolol on platelet function and
fibrinolytic activity in patients with coronary heart disease.</strong> Jurgensen
HJ, Dalsgaard-Nielsen J, Kjoller E, Gormsen J. In 14 patients with coronary
heart disease the effect of long-term treatment (mean 16 months, range
12-33) with alprenolol on platelet function and fibrinolytic activity
was studied. While on the beta-blocker and two weeks after gradual withdrawal
of it, the patients performed a bicycle-ergometer test and blood samples
were obtained before and following exercise. Pre-exercise fibrinolytic
activity, assessed by the euglobulin clot lysis time, was 183 +/- 27
min (mean +/- SEM) while on alprenolol as compared to 111 +/- 18 min
(p less than 0.01) after its withdrawal. Activation of fibrinolysis
following exercise was not significantly influenced by alprenolol. In
patients treated with alprenolol, the pre-exercise threshold level of
ADP, producing platelet aggregation was 3.3 muM (geometric mean) and
5.1 muM after stopping treatment (p less than or equal to 0.05). In
patients receiving the beta-blocker, the ADP- threshold value dropped
from 3.3 muM before exercise to 2.3 muM immediately after exercise (not
significant). The corresponding values after withdrawal of alprenolol
were 5.1 muM and 2.7 muM (p less than or equal to 0.02). Adrenaline
- stimulated aggregation was not significantly influenced by alprenolol.
Serotonin release from platelets following maximal ADP- and adrenaline
stimuli was not significantly changed by exercise in patients on beta-blockade.
After stopping treatment, ADP-induced serotonin release was 22 +/- 4.1%
before and 15 +/- 4.7% after exercise (p less than 0.02). the corresponding
values using the adrenaline stimulus were 29 +/- 5.7% and 17 +/- 4.7%
(p less than 0.05). It is suggested that during physical stress alprenolol
may protect platelets against aggregatory stimuli.</p>
<p>C
R Seances Soc Biol Fil 1987;181(3):242-8.<strong> [Adrenaline activates oxidative
phosphorylation of rat liver mitochondria through alpha 1-receptors].</strong>
Breton L, Clot JP, Bouriannes J, Baudry M. We studied the effects and
mode of action of epinephrine on the oxidative phosphorylation of rat
liver mitochondria. With either succinate or beta-hydroxybutyrate as
substrate, i.v. injection of 1.5 microgram/100 g epinephrine increased
the respiratory rates by 30-40% in state 3 (with ADP), and by 20-30%
in state 4 (after ADP phosphorylation), so that the respiratory control
ratio (state 3/state 4) changed little. The respiratory stimulation
by epinephrine was maximal 20 minutes after its injection. The action
of epinephrine on mitochondria was blocked by pretreatment of the animals
with the alpha 1-antagonist prazosin but not by treatment with the beta-antagonist
propranolol. I. v. injection of 10 micrograms/100 g phenylephrine evoked
the same mitochondrial response as epinephrine. I. v. administration
of 50 micrograms/100 g dibutyryl cyclic AMP enhanced glycaemia but did
not affect mitochondrial respiration. Epinephrine therefore has an alpha
1-type of action on mitochondrial oxidative phosphorylation.</p>
<p>Biochimie
1975;57(6-7):797-802. <strong>Effects of
catecholamines on rat myocardial metabolism. I. Influence of
catecholamines on energy-rich nucleotides and
phosphorylated fraction contents.</strong> Merouze P, Gaudemer Y. 1. The
influence of catecholamines (adrenaline and noradrenaline) on energy
metabolism of the rat myocardium has been studied by incubating slices
of this tissue with these hormones and by following the levels of the
different phosphorylated fractions and adenylic nucleotides. 2. Similar
effects are obtained with both hormones, adrenaline being more effective.
3<strong>. Catecholamines decrease significantly the total amount of phosphate
while Pi content increases during the first 10 minutes of incubation;
labile and residual phosphate contents increase at the beginning of
incubation and decrease to the initial values afterwards. 4. ATP and
ADP levels decrease significantly</strong> with both hormones; however, the
effect of noradrenalin on the ATP level needs a longer time of incubation. <strong>
The ATP/ADP ratios decrease after 5 minutes incubation and the total
adenylic nucleotide content is severely decreased (35 per cent with
adrenalin, after 20 minutes incubation). 5. Similar results have been
obtained with other tissues; these results can explain the decrease
of aerobic metabolism we observed under the same conditions.</strong></p>
<p>Eur
J Pharmacol 1982 Jul 30;81(4):569-76<strong>. Actions of
serotonin antagonists on dog coronary artery.</strong> Brazenor RM, Angus
JA. Serotonin released from platelets may initiate coronary vasospasm
in patients with variant angina. If this hypothesis is correct, serotonin
antagonists without constrictor activity may be useful in this form
of angina. We have investigated drugs classified as serotonin antagonists
on dog circumflex coronary artery ring segments in vitro. Ergotamine,
dihydroergotamine,<strong> bromocriptine,
lisuride, ergometrine, ketanserin,
trazodone, cyproheptadine and pizotifen caused
non-competitive antagonism of serotonin concentration-response</strong> curves.
In addition, ketanserin, trazodone, bromocriptine and pizotifen inhibited
noradrenaline responses in concentrations similar to those required
for serotonin antagonism. All drugs with the exception of ketanserin,
cyproheptadine and pizotifen showed some degree of intrinsic constrictor
activity. Methysergide antagonized responses to serotonin competitively
but also constricted the coronary artery. The lack of a silent competitive
serotonin antagonist precludes a definite characterization of coronary
serotonin receptors at this time. However, the profile of activity observed
for the antagonist drugs in the coronary artery differs from that seen
in other vascular tissues. Of the<strong> drugs tested,
ketanserin may be the most useful in variant angina since it is a potent
5HT antagonist, lacks agonist activity and has
alpha-adrenoceptor blocking activity.</strong></p>
<p>Arch
Mal Coeur Vaiss 1983 Feb;76 Spec No:3-6.<strong> Role of autonomic nervous
system in the pathogenesis of angina pectoris.</strong> Yasue H. The attacks
of vasospastic angina or coronary spasm can be induced by injection
of epinephrine, cold pressor test, Valsalva maneuver, and exercise.
The attacks induced by these procedures can be suppressed by injection
of phentolamine, an alpha adrenergic blocking agent in 80 per cent of
the patients. On the other hand, propranolol, a beta adrenergic blocking
agent, is not only ineffective in suppressing the attacks but aggravates
the attacks in 50 per cent of the patients. Thus, alpha adrenergic receptors
seem to play an important role in the production of vasospastic angina.
The attacks of vasospastic angina can also be induced by injection of
methacholine, a parasympathomimetic agent, and this reaction is suppressed
by atropine, a parasympathetic blocking agent. Thus,<strong> parasympathetic
nervous system also seems to play a role in the production of
vasospastic angina. The attacks of
vasospastic angina can be easily induced by
adrenergic or parasympathetic stimuli from midnight to early morning
but is</strong> usually not provoked by these stimuli in the daytime. Thus,
there is circadian variation in the reactivity of coronary arteries
to adrenergic or parasympathetic stimuli. There are also weekly, monthly
and yearly variations of the reactivity of coronary arteries to these
stimuli. Thus, <strong>alpha adrenergic or parasympathetic activity is not
the sole factor in the production of
vasospastic angina.</strong> Angina pectoris caused by increased myocardial
oxygen demand is induced by infusion of isoproterenol, a beta adrenergic
stimulant, and is suppressed by propranolol but not by phentolamine.
So, beta adrenergic receptors play an important role in the production
of angina pectoris caused by increased myocardial oxygen demand or organic
angina pectoris.</p>
<p>Nippon
Yakurigaku Zasshi 1986 Mar;87(3):281-90. [Vasoconstrictor responses
of isolated pig coronary arteries]. [Article in Japanese] Ikenoue K,
Kawakita S, Toda N.<strong> In helical strips of pig coronary arteries, histamine,
serotonin, acetylcholine and a stable analogue of
thromboxane A2 (9, 11-epithio-11, 12-methano
TXA2: s-TXA2) produced a dose-dependent contraction. The histamine-induced
contraction</strong> was suppressed by treatment with chlorpheniramine, suggesting
an involvement of H1 receptors. Contractile responses to serotonin were
attenuated by not only ketanserin, an S2 antagonist, but also by cinanserin
and methysergide. Relaxation induced by serotonin in preparations treated
with high concentrations of ketanserin were inhibited by cinanserin
and methysergide. Norepinephrine contracted coronary arteries treated
with propranolol. Contractile responses to norepinephrine were reversed
to relaxations by prazosin, which were abolished by treatment with yohimbine.
Contractile responses to histamine were potentiated by treatment with
low concentrations of serotonin or s-TXA2. Contractile responses to
serotonin were also potentiated by low concentrations of histamine or
s-TXA2. Removal of the endothelium from pig coronary arterial strips
potentiated contractions induced by serotonin, histamine and norepinephrine.
These results suggest that, in addition to damaged endothelium, integrating
action of endogenous vasoconstrictors, including histamine, serotonin,
TXA2 and norepinephrine, may play an important role in producing coronary
vasospasm.</p>
<p>Jpn
Heart J 1987 Sep;28(5):649-61<strong>. The role of parasympathetic nerve
activity in the pathogenesis of coronary
vasospasm.</strong> Suematsu M, Ito Y, Fukuzaki H. To evaluate the role of
the autonomic nervous system, especially the parasympathetic nervous
system, in the initiation mechanism of vasospastic angina pectoris (AP),
the coefficient of R-R interval variation (CV) on the electrocardiogram
(ECG) and plasma catecholamine concentration were measured in 25 patients
with vasospastic AP, 10 patients with effort AP and 12 control subjects.
CV which has been recognized as reflecting parasympathetic nervous system
activity was calculated from 100 consecutive heart beats on the ECG
and represented as the percentage of standard deviation of the R-R interval
per mean R-R interval. Repeated measurements of <strong>plasma
catecholamine concentration revealed higher values at any sampling point
throughout a day in patients with vasospastic AP than those in </strong>
control subjects. A distinctly higher CV was observed at night in the
vasospastic AP group. <strong>This elevated CV was abolished by atropine
sulfate (1.5 mg/day per os). Pilocarpine injection (1.3 mg/10 kg
B.W. subcutaneously) induced a marked increase</strong> in CV that preceded
the occurrence of chest pain and/or ischemic ECG changes in 5 patients
with vasospastic AP. The<strong> increment in CV at 10 min after
pilocarpine administration was greater in
vasospastic AP than in control subjects (p less than 0.05). It is concluded
that enhanced parasympathetic activity may play a role in the initiation
of coronary vasospasm associated with sympathetic hyperactivity.</strong></p>
<p>Science
1984 Mar 30;223(4643):1435-7.<strong> Coronary arteries of cardiac patients
are hyperreactive and contain stores of amines: a mechanism
for coronary spasm.</strong> Kalsner S, Richards R. Coronary arteries from
hearts of cardiac patients contain significantly higher concentrations
of histamine than do those from noncardiac patients. The coronary vessels
of cardiac patients are also hyperresponsive to histamine and serotonin.
These differences between groups of patients suggest an explanation
for coronary artery spasm in heart disease.</p>
<p>Fed
Proc 1985 Feb;44(2):321-5. <strong>Coronary artery reactivity in human vessels:
some questions and some answers.</strong> Kalsner S. Spasm of a conduit coronary
artery, converting it into a major resistance vessel impeding myocardial
blood flow, may have severe short- or long-term effects on cardiac rhythm
and systolic ejection of blood. It is now clear that human coronary
arteries in vitro contract to acetylcholine but that relaxation is the
only response observed in dog coronary vessels. <strong>Acetylcholine is
as powerful a constrictor of human coronary arteries, in terms of tension
induced, as 5-hydroxytryptamine (5-HT) or histamine and is a substantially
more powerful constrictor than norepinephrine.</strong> Field stimulation
of coronary artery strips caused a vasoconstriction that was partially
antagonized by atropine (3.45 X 10(-6) M). An enhanced reactivity of
the epicardial arteries of cardiac and older patients to several agonists
was also observed and appears to provide a background against which
a number of vasoactive agents might induce spasm. Coronary tissue from
cardiac patients also contains stores of 5-HT and histamine, and the
histamine levels are substantially increased above the values in vessels
from noncardiac patients. Coronary artery spasm or contraction<strong> probably
can be initiated by diverse intrinsic and extrinsic influences, including
autonomic discharge from either the parasympathetic or sympathetic nervous
system or from histamine or 5-HT, and probably no one agent or entity
is causative in all cases.</strong></p>
<p>Ann
N Y Acad Sci 1969 Oct 14;164(2):517-9. <strong>Induced
carcinogenesis under various influences on the hypothalamus.</strong> Kavetsky
RE, Turkevich NM, Akimova RN, Khayetsky IK, Matveichuck YD.</p>
<p>Ann
N Y Acad Sci 1966 Jan 21;125(3):933-45. <strong>On the
psychophysiological mechanism of the organism's resistance to tumor
growth.</strong> Kavetsky RE, Turkevich NM, Balitsky KP.</p>
<p>Patol
Fiziol Eksp Ter 1971 Sep-Oct;15(5):3-10. [Role of disorders in intra-cellular
and neuro-humoral regulation in the development of the tumor process].
[Article in Russian] Kavetskii RE, Balitskii KP.</p>
<p>Obstet
Gynecol Surv 1977 May;32(5):267-81. <strong>Estrogen and
endometrial carcinoma. </strong>Knab DR. 1. It has become evident that the
estrogen secreting tumors of the ovary are associated with endometrial
carcinoma, but this association is most easily observed in the postmenopausal
patient where the incidence of carcinoma has been<strong> reported at 10.3%
(1. 02) to 24% (83). 2. The most consistent association of
endometrial carcinoma is with polycystic ovarian disease, where 19 (34),
21 (152), and 25% (150) of young women with
endometrial carcinoma had Stein-Leventhal syndrome (67). 3. A very significant
discovery became known in</strong> 1967 when the peripheral aromatization
of delta4 androstenedione to estrone was reported by Kase (94) and MacDonald
(111,112). Since that time we have learned that endometrial carcinoma
patients have an <strong>increased peripheral conversion (139) (0.1% compared
to 0.027%), which is similar to that found in obese and aging patients,
by Hemsell, et al (77).</strong> This can be 2 to 4 times greater than the
young adult or the patient without cancer. Estrone produced peripherally
in normal postmenopausal women can amount to 40-60 microng/day and rise
as high as 120-180 microng/day in the endometrial neoplasia group (39).
Similarly patients with polycystic ovary disease, hyperthecosis and
lipoid cell tumors of the ovary demonstrate androgen excess with extraglandular
conversion to estrone (2). 4. It has become apparent that the principal
estrogen in the postmenopausal patient is estrone and that the <strong>estrone-estradiol
ratio in the serum is higher in postmenopausal women with corpus cancer
than similar patients without cancer</strong> (135). Clearly, we must find
the effect of this estrone excess at the nuclear &quot;acceptor&quot;
level; and does this imbalance create a hormonal environment conducive
to the development of endometrial carcinoma when age (an extremely important
factor) and an oncogenic agent are added? 5. With the lack of ovarian
estrogen there is a relative excess of adrenal testosterone, dihydrotestosterone
and delta4 androstenedione, the available precursors of extraglandular
estrone (1). 6. With the passage of time <strong>it appears that
endometrial carcinoma is associated with hypothalamic &quot;hyperactivity&quot;</strong>
(31) which exhibits immunologic-biologic dissociation of LH as previously
observed in persistent trophoblastic disease when measuring hCG. The
significance of this is still unknown. In a like fashion a significant
number of the at risk polycystic ovary disease patients have an increased
LH secretion. 7. Patient susceptibility is required as seen in animal
experiments where prolonged administration of stilbestrol is used and
still only rabbits and mice developed a malignant change. 8. Long term
exogenous estrogen appears to have caused malignant changes in the endometrium,
but it was universally given over a prolonged period (4 or more
years). The recent retrospective studies demonstrate an association
of oral estrogen therapy with endometrial cancer, but prospective studies
investigating dose and duration of all estrogen preparations need to
be undertaken. 9...</p>
<p>Endocrinology
2000 Mar;141(3):1059-72.<strong> An increased
intraovarian synthesis of nerve growth factor and its low affinity receptor
is a principal component of steroid-induced
polycystic ovary in the rat.</strong> Lara HE, Dissen GA, Leyton V, Paredes
A, Fuenzalida H, Fiedler JL, Ojeda SR. A form of polycystic ovary (PCO)
resembling some aspects of the human PCO syndrome can be induced in
rats by a single injection of estradiol valerate (EV). An increase in
sympathetic outflow to the ovary precedes, by several weeks, the appearance
of cysts, suggesting the involvement of a neurogenic component in the
pathology of this ovarian dysfunction. The present study was carried
out to test the hypotheses that this change in sympathetic tone is related
to an augmented production of ovarian nerve growth factor (NGF), and
that this abnormally elevated production of <strong>NGF contributes to the
formation of ovarian cysts induced by
EV. Injection of the steroid resulted in increased
intraovarian synthesis of NGF</strong> and its low affinity receptor, p75
NGFR. The increase was maximal 30 days after EV, coinciding with the
elevation in sympathetic tone to the ovary and preceding the appearance
of follicular cysts. Intraovarian injections of the retrograde tracer
fluorogold combined with in situ hybridization to detect tyrosine hydroxylase
(TH) messenger RNA-containing neurons in the celiac ganglion revealed
that these changes in NGF/p75 NGFR synthesis are accompanied by selective
activation of noradrenergic neurons projecting to the ovary. The levels
of RBT2 messenger RNA, which encodes a beta-tubulin presumably involved
in slow axonal transport, were markedly elevated, indicating that EV-induced
formation of ovarian cysts is preceded by functional activation ofceliac
ganglion neurons, including those innervating the ovary. Intraovarian
administration of a neutralizing antiserum to NGF in conjunction with
an antisense oligodeoxynucleotide to p75 NGFR, via Alzet osmotic minipumps, <strong>
restored estrous cyclicity and ovulatory capacity in a</strong> majority
of EV-treated rats. These functional changes were accompanied by restoration
of the number of antral follicles per ovary that had been depleted by
EV and a significant reduction in the number of both precystic follicles
and<strong> follicular cysts. The results indicate that the
hyperactivation of ovarian sympathetic nerves seen in
EV-induced PCO is related to an overproduction of
NGF and its low affinity receptor in the gland. They also suggest that
activation of this neurotrophic-neurogenic regulatory loop is a component
of the pathological process by which
EV induces cyst formation and anovulation in rodents. The</strong> possibility
exists that a similar alteration in neurotrophic input to the ovary
contributes to the etiology and/or maintenance of the PCO syndrome in
humans.</p>
<p>Acta
Physiol Hung 1996;84(2):183-90.<strong> Effects of hormones on the number,
distribution and degranulation of mast cells in the ovarian complex
of mice.</strong> Jaiswal K, Krishna A. The changes in the number and degranulation
pattern of mast cells varied with the types of hormonal treatment and
ovarian compartment. <strong>Luteinizing hormone
(LH), follicle stimulating hormone
(FSH), thyroid stimulating hormone
(TSH) and 17-beta estradiol (E2) treatment caused increase (P &lt; 0.05)
in the number of mast cells</strong> in the hilum as compared with the controls.
Increase (P &lt; 0.05) in the number of mast cells in the whole ovarian
complex was observed only following FSH and E2 treatment. All the hormones
used in the present study increased the percentage degranulation of
mast cells in the hilum. However, only LH, FSH and E2 increased the
percentage degranulation of mast cells in other compartments of the
ovary (medulla, bursa and cortex). TSH and ACTH failed to cause any
increase in the percentage degranulation of mast cells in these compartments.
The present findings indicate E2 to be the most potent among the hormones
tested in causing degranulation of mast cells in all ovarian compartments.</p>
<p>Fertil
Steril 2001 Jun;75(6):1141-7. <strong>Increase in nerve fibers and loss of
mast cells in polycystic and postmenopausal ovaries.</strong> Heider U, Pedal
I, Spanel-Borowski K. OBJECTIVE: To quantify nerve fibers and mast cells
in human ovaries at different functional stages. DESIGN: Retrospective
study. SETTING: Research laboratory of the university. SPECIMEN(S):
8 human ovaries in the follicular (cyclic) phase, 7 polycystic ovaries,
and postmenopausal ovaries with (n=5) or without (n=7) hyperthecosis.
MAIN OUTCOME MEASURE(S): Single- and double immunohistology for the
S100 antigen in glial cells of autonomic nerve fibers, for chymase and
tryptase in mast cells, and for the common leukocyte antigen on leukocytes.
Histometric evaluation was also performed. INTERVENTION(S): None. RESULT(S):
Polycystic ovaries contained significantly more S100-positive nerve
fibers in the corticomedullary region than did cyclic ovaries (mean
+/- SD per 2-mm(2) area, 476 +/- 136 and 224 +/- 133; P&lt;.01). Postmenopausal
ovaries with or without hyperthecosis had the highest density of nerve
fibers. In cyclic and polycystic ovaries, more tryptase-positive mast
cells than chymase-positive mast cells were found in the interstitial
cortex and the medulla. In cyclic ovaries, areas with a moderate density
of nerve fibers contained many mast cells. Hence, <strong>with increasing
nerve fiber density in polycystic ovaries, the number of mast cells
decreased strikingly compared with cyclic ovaries (p&lt;.001). Almost
no mast cells were seen in postmenopausal ovaries</strong> with and without
hyperthecosis. The number of leukocyte antigen-positive leukocytes was
similar in all groups. CONCLUSION(S): The high density of nerve fibers
in polycystic and postmenopausal ovaries, together with a conspicuous
decrease in mast cells, indicates altered neuroimmune communication.</p>
<p>Endocrinology
1993 Dec;133(6):2696-703. <strong>Ovarian
steroidal response to gonadotropins and
beta-adrenergic stimulation is enhanced in
polycystic ovary syndrome: role of sympathetic
innervation.</strong> Barria A, Leyton V, Ojeda SR, Lara HE. Experimental
induction of a polycystic ovarian syndrome (PCOS) in rodents by the<strong>
administration of a single dose of
estradiol valerate (EV) results in activation of the peripheral sympathetic
neurons that innervate the ovary. This activation is evidenced by an
increased capacity of ovarian nerve terminals to incorporate and release
norepinephrine (NE), an increase in ovarian NE content, and a</strong> decrease
in ovarian beta-adrenergic receptor number in the ovarian compartments
receiving catecholaminergic innervation. The present experiments were
undertaken to <strong>examine the functional consequences of this enhanced
sympathetic outflow to the ovary.</strong> The steroidal responses of the
gland to beta-adrenergic receptor stimulation and hCG were examined
in vitro 60 days after EV administration, i.e. at the time when follicular
cysts are well established. EV-treated rats exhibited a remarkable increase
in ovarian progesterone and androgen responses to isoproterenol, a beta-adrenergic
receptor agonist, with no changes in estradiol responsiveness. Basal
estradiol release was, however, 50-fold higher than the highest levels
released from normal ovaries at any phase of the estrous cycle. The
ovarian progesterone and androgen responses to hCG were enhanced in
EV-treated rats, as were the responses to a combination of isoproterenol
and hCG. Transection of the superior ovarian nerve (SON), which carries
most of the catecholaminergic fibers innervating endocrine ovarian cells,
dramatically reduced the exaggerated responses of all three steroids
to both beta-adrenergic and gonadotropin stimulation. SON transection
also reduced the elevated levels of ovarian NE resulting from EV treatment
and caused up-regulation of beta-adrenoreceptors. Most importantly,
SON transection restored estrous cyclicity and ovulatory capacity. The
results indicate that the increased output of ovarian steroids in PCOS
is at least in part due to an enhanced responsiveness of the gland to
both catecholaminergic and gonadotropin stimulation. The ability of
SON transection to restore a normal response indicates that the alteration
in steroid output results from a deranged activation of selective components
of the noradrenergic innervation to the ovary. These findings support
the concept that an alteration in the neurogenic control of the ovary
contributes to the etiology of PCOS.
</p>
</small>
<hr>
<p class="C">Library of GigaChad | <a href="/" target="_blank">GigaChad</a></p>
</body>
</html>