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"Sympathectomy is a technique about which we have limited knowledge, applied to disorders about which we have little understanding." Associate Professor Robert Boas, Faculty of Pain Medicine of the Australasian College of Anaesthetists and the Royal College of Anaesthetists, The Journal of Pain, Vol 1, No 4 (Winter), 2000: pp 258-260
The amount of compensatory sweating depends on the patient, the damage that the white rami communicans incurs, and the amount of cell body reorganization in the spinal cord after surgery.
Other potential complications include inadequate resection of the ganglia, gustatory sweating, pneumothorax, cardiac dysfunction, post-operative pain, and finally Horner’s syndrome secondary to resection of the stellate ganglion.
www.ubcmj.com/pdf/ubcmj_2_1_2010_24-29.pdf
After severing the cervical sympathetic trunk, the cells of the cervical sympathetic ganglion undergo transneuronic degeneration
After severing the sympathetic trunk, the cells of its origin undergo complete disintegration within a year.
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0442.1967.tb00255.x/abstract
Spinal cord infarction occurring during thoraco-lumbar sympathectomy
J Neurol Neurosurg Psychiatry 1963;26:418-421 doi:10.1136/jnnp.26.5.418
Other potential complications include inadequate resection of the ganglia, gustatory sweating, pneumothorax, cardiac dysfunction, post-operative pain, and finally Horner’s syndrome secondary to resection of the stellate ganglion.
www.ubcmj.com/pdf/ubcmj_2_1_2010_24-29.pdf
After severing the cervical sympathetic trunk, the cells of the cervical sympathetic ganglion undergo transneuronic degeneration
After severing the sympathetic trunk, the cells of its origin undergo complete disintegration within a year.
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0442.1967.tb00255.x/abstract
Spinal cord infarction occurring during thoraco-lumbar sympathectomy
J Neurol Neurosurg Psychiatry 1963;26:418-421 doi:10.1136/jnnp.26.5.418
Saturday, July 9, 2011
blunted hypoxic pulmonary vasoconstriction due to partial interruption of the sympathetic nerve supply to the lung by bilateral thoracic sympathectomy
Anaesth Intensive Care. 2003 Oct;31(5):581-3.
Orthodeoxia--an uncommon presentation following bilateral thoracic sympathectomy.
Source
Departments of Intensive Care and Vascular Surgery, Sir Charles Gairdner Hospital, Pharmacology Unit, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia.
Abstract
We present a case of orthodeoxia (postural hypoxaemia) which resulted from a combination of lung collapse/consolidation and blunted hypoxic pulmonary vasoconstriction due to partial interruption of the sympathetic nerve supply to the lung by bilateral thoracic sympathectomy.
http://www.ncbi.nlm.nih.gov/pubmed/14601286
Tuesday, July 5, 2011
A depression in the heart rate and decrease in response to stress is expected to some degree in all patients after sympathectomy
A depression in the heart rate with resultant drop in the heart rate product and decrease in response to stress is expected to some degree in all patients. Some series have described this finding in most patients, whereas others report at least a 10% drop in heart rate in all patients. This is a possible major cause for postoperative dysfunction and should be cautiously sought after. Patients with resting heart rate that is below 50 to 60 beats/min should undergo electrocardiography. It is recommended that if the heart rate is low on a subsequent electrocardiogram as well, that a tilt test should be performed to exclude patients in whom there is an inordinately high risk of postoperative bradycardia.
http://ats.ctsnetjournals.org/cgi/content/full/85/2/S764
Sunday, July 3, 2011
mechanisms of the post-sympathectomy syndrome and of the action of these drugs are uncertain
Fifty-six consecutive patients who subsequently underwent ninety-six lumbar sympathectomies were studied prospectively with regard to the development of postoperative pain. Pain after operation was observed in thirty-four extremities by twenty-five of the patients (35 per cent). It began abruptly an average of twelve days after operation and was often accentuated nocturnally. The pain was almost always described as a deep, dull ache and persisted two to three weeks before spontaneously remitting. Postsympathectomy pain of such severity that parenteral narcotics afforded no relief developed in two of these fifty-six patients and in nine additional patients. Treatment with carbamazepine produced dramatic reduction in the intensity of pain in seven of these nine patients within twenty-four hours after the institution of therapy. Two patients were given intravenous diphenylhydantoin and both experienced immediate relief of pain. The mechanisms of the syndrome and of the action of these drugs are uncertain.
http://www.sciencedirect.com/science/article/pii/0002961074902384
post-sympathectomy syndrome
Sympathectomy. Some patients with CRPS have good pain relief from sympathetic nerve blocks, but the pain relief does not last long. For these patients, doctors might suggest a sympathectomy (killing the sympathetic nerves leading to the painful body part, either by using surgery or chemicals). Some patients get longer pain relief after the sympathectomy, but others do not. Also, there is the slight chance that patients who get a sympathectomy for CRPS of the leg might develop a new pain syndrome, called post-sympathectomy syndrome.
http://www.stoppain.org/pain_medicine/content/chronicpain/crps.asp
On the subject of "reversal" of sympathectomy
Reply from Dr Alan Cameron (UK):
I am sorry to be the bearer of bad news, but there was little new on reversals at the recent ISSS. There was only one formal paper, from Connery in New York, who had used the Da Vinci robot for an intercostal nerve graft to somebody who had had T2-4 removed. The reason for using the robot was to suture the graft rather than glue it. It did seem to have worked. There was a bit of discussion about use of an artificial neural tube, but nobody seemed to have used it for ETS-reversal. Reisfeld was there of course, but did not present his reversal results; talking to him he seemed a bit unsure about whether they worked. Equally the Italians are dubious. The Australians were represented by Hensman, but I did not get a chance to quiz him on their progress as he had to leave early.
So no great breakthrough I am sorry to say, in fact rather a retrenchment.
If I hear anything different I shall of course let you know,
http://etsandreversals.yuku.com/topic/3537/ALL-CLINICS-THAT-ARE-ON-THE-BOARD?page=64#.ThEkga487vA
Sunday, June 26, 2011
Sympathectomy altered electroactivity on the heart
The influences on the cardiac autonomic nerve system of the ETS of upper thoracic sympathetic nerve were seen to be of a lesser degree at rest. However, the response to sympathetic stimulation was suppressed after the surgery.
Eur J Cardiothorac Surg 1999;15:194-198
http://ejcts.ctsnetjournals.org/cgi/content/full/15/2/194
Sympathectomy altered electroactivity on the heart
The influences on the cardiac autonomic nerve system of the ETS of upper thoracic sympathetic nerve were seen to be of a lesser degree at rest. However, the response to sympathetic stimulation was suppressed after the surgery.
Eur J Cardiothorac Surg 1999;15:194-198
http://ejcts.ctsnetjournals.org/cgi/content/full/15/2/194
reduced high-frequency power after sympathetic blockade
Alternatively, reduced high-frequency power after sympathetic blockade may also be explained by diminished “accentuated antagonism,” a phenomenon described more than three decades ago (4). Heart rate response to vagal nerve stimulation is accentuated when sympathetic tone is elevated, and vice versa. Thus, cardiac sympathetic withdrawal by high spinal or epidural blockade may have resulted in diminished beat-to-beat fluctuations of R-R intervals without alteration of actual vagal nerve activity. To draw a definitive conclusion regarding the mechanism, determinations of central vagal/sympathetic outflow would be mandatory by an animal experiment.
http://www.anesthesia-analgesia.org/content/100/4/1216.2.full
- 1.↵ Tanaka M, Goyagi T, Kimura T, Nishikawa T. The effects of cervical and lumbar epidural anesthesia on heart rate variability and spontaneous sequence baroreflex sensitivity. Anesth Analg 2004;99:924–9.
- 2.↵ Introna R, Yodlowski E, Pruett J, et al. Sympathovagal effects of spinal anesthesia assessed by heart rate variability analysis. Anesth Analg 1995;80:315–21.
- 3.↵ Malliani A, Pagani M, Lombardi F, et al. Cardiovascular regulation explored in the frequency domain. Circulation 1991;84:482–92.
- 4.↵ Levy MN. Sympathetic-parasympathetic interactions in the heart. Circ Res1971;29:437–45.
Thursday, June 2, 2011
regional sympathectomy leads to qualitative alterations in localized bone modeling and remodeling
Bone modeling and remodeling are highly regulated processes in the mammalian skeleton. The exact mechanism by which bone can be modeled at a local site with little or no effect at adjacent anatomic sites is unknown. Disruption of the control of modeling within the temporal bone may lead to various bone disease such as otosclerosis, osteogenesis imperfecta, Paget's disease of bone, fibrous dysplasia, or the erosion of bone associated with chronic otitis media. One possible mechanism for such delicate control may be related to the ubiquitous and rich sympathetic innervation of all periosteal surfaces. Previous studies have indicated that regional sympathectomy leads to qualitative alterations in localized bone modeling and remodeling. In this study, unilateral cervical sympathectomy resulted in significant increases in osteoclast surface and osteoclast number within the ipsilateral bulla of experimental animals. The mechanisms by which sympathectomy leads to increased local bone loss is unknown. Potential mechanisms include disinhibition of resorption, secondary to the elimination of periosteal sympathetics, as well as indirect vascular effects.
http://www.ncbi.nlm.nih.gov/pubmed/8723974
Sunday, May 29, 2011
Saturday, May 28, 2011
dysregulation of the immune system after sympathectomy (Haug and Heyeraas, 2005
jdr.sagepub.com/content/85/6/488.full.pdf
After unilateral sympathectomy the incidence of calcified arteries on the side of operation was significantly higher than that on the contralateral side
Medial arterial calcification is frequently seen in diabetic patients with severe diabetic neuropathy. Sixty patients (19 diabetic and 41 non-diabetic) were examined radiologically for typical Monckeberg's sclerosis of feet arteries 6-8 years after uni- or bilateral lumbar sympathectomy. Fifty-five out of 60 patients (92%) revealed medial calcification. This calcification was observed in both feet of 93% of patients, who had undergone bilateral operation. After unilateral sympathectomy the incidence of calcified arteries on the side of operation was significantly higher than that on the contralateral side (88% versus 18%, p less than 0.01). Although diabetic patients showed longer
stretches of calcification than non-diabetic subjects, the difference was not significant in terms of incidence and length. Of 20 patients who had no evidence of calcinosis pre-operatively, 11 developed medial calcification after unilateral operation exclusively on the side of sympathectomy. In seven patients calcinosis was detected in both feet after bilateral operation. In conclusion, sympathetic denervation is one of the causes of Monckeberg's sclerosis regardless of diabetes mellitus.
PMID: 6873514 [PubMed - indexed for MEDLINE]
Diabetologia. 1983 May;24(5):347-50.
stretches of calcification than non-diabetic subjects, the difference was not significant in terms of incidence and length. Of 20 patients who had no evidence of calcinosis pre-operatively, 11 developed medial calcification after unilateral operation exclusively on the side of sympathectomy. In seven patients calcinosis was detected in both feet after bilateral operation. In conclusion, sympathetic denervation is one of the causes of Monckeberg's sclerosis regardless of diabetes mellitus.
PMID: 6873514 [PubMed - indexed for MEDLINE]
Diabetologia. 1983 May;24(5):347-50.
in the media of FAs hypercholesterolemia induces changes similar to those observed in sympathectomized rabbits in non-pathological conditions
In a previous study, we showed that after sympathectomy, the femoral (FA) but not the basilar (BA) artery from non-pathological rabbits manifests migration of adventitial fibroblasts (FBs) into the media and loss of medial smooth muscle cells (SMCs). The aim of the present study was to verify whether similar behaviour of arteries occurred in the pathological context of atherosclerosis.
Our results show that in the media of FAs hypercholesterolemia induces changes similar to those observed in sympathectomized rabbits in non-pathological conditions, i.e., migration of adventitial FBs to the media and loss of medial SMCs. These latter changes, which can be ascribed to pathological events, were accentuated after sympathectomy in the hypercholesterolemic rabbits. The present study reveals that pathological events, including migration and phenotypic modulation of vascular FBs and loss of SMCs, may be under the influence of sympathetic nerves.
Acta Histochemica; Jul2008, Vol. 110 Issue 4, p302-313, 12p
Our results show that in the media of FAs hypercholesterolemia induces changes similar to those observed in sympathectomized rabbits in non-pathological conditions, i.e., migration of adventitial FBs to the media and loss of medial SMCs. These latter changes, which can be ascribed to pathological events, were accentuated after sympathectomy in the hypercholesterolemic rabbits. The present study reveals that pathological events, including migration and phenotypic modulation of vascular FBs and loss of SMCs, may be under the influence of sympathetic nerves.
Acta Histochemica; Jul2008, Vol. 110 Issue 4, p302-313, 12p
sympathectomy results in an increased collagen content in the vascular wall, suggesting a stiffening of the vessel wall
From animal experiments, it is known that long-term sympathectomy results in an increased collagen content in the vascular wall, suggesting a stiffening of the vessel wall (9). Giannattasio et al.
MEDICINE & SCIENCE IN SPORTS & EXERCISE®
Copyright © 2005 by the American College of Sports Medicine
DOI: 10.1249/01.mss.0000174890.13395.e7
MEDICINE & SCIENCE IN SPORTS & EXERCISE®
Copyright © 2005 by the American College of Sports Medicine
DOI: 10.1249/01.mss.0000174890.13395.e7
Thursday, May 26, 2011
cervical sympathectomy resulted in a moderate and short decrease in milk secretion
Unilateral cervical sympathectomy resulted in a moderate and short decrease in milk secretion, the average amount of milk given by operated animals 10 days after operation being 76-3% of the initial level. Total cervical sympathectomy (the 2nd operation was performed 1 month later) caused a much greater and more prolonged decrease in milk secretion, 59.7% of the initial level being secreted during the 10 days after operation. A gradual increase in milk secretion was observed after the operation and this increase was more gradual after total sympathectomy than after partial sympathectomy. Denervation of the thyroid and parathyroids did not decrease milk secretion. Section of the pituitary stalk in 6 goats, which included complete section (2 goats), complete section with scar tissue at the site of section and considerable damage to the median eminence of the tuber einereum (1 goat) and incomplete section (3 goats) was performed. Milk ejection disappeared completely for 7-11 days in the goats with complete section and remained defective for some weeks after, but was still effective in those where the infundibular stem and part of the glandular portion of the pituitary stalk was still intact. Milk secretion was 28.9% of the initial level in the goats with complete section and 12.9% in the goat with the scar tissue whereas it was 40.5 and 55.7% in the incompletely sectioned and control operated goats. (See also D.S.A. 21 [3081].) D.E.E.
http://www.cabdirect.org/abstracts/19600402546.html;jsessionid=A943A1F56D5D120B419B65425A893BB0
http://www.cabdirect.org/abstracts/19600402546.html;jsessionid=A943A1F56D5D120B419B65425A893BB0
Endoscopic sympathicotomy and endoscopic sympathetic block strongly influence typical symptoms of patients with social phobia
Social phobia is an anxiety disorder which causes fear and anxiety in social interaction or performance situations and can in its worst forms be very debilitating. The patients tend to isolate themselves and suffer from comorbid disorders such as depression, other anxiety disorders and drug and alcohol abuse. Traditional treatment methods such as medication and psychotherapy cause improvement in only 50–70% of patients. METHODS: 164 patients who had been suffering from social phobia for at least 5 years and who were resistant to conservative treatment (medication and/or psychotherapy) were enrolled in this open, uncontrolled, prospective follow-up study. 71 patients underwent endoscopic sympathicotomy (cauterisation); 93 underwent endoscopic sympathetic block (clamping) of the T2–T3 ganglia. Severity of psychic and physical symptoms was assessed by a modified version of Davidson’s brief social phobia scale and patients’ satisfaction was evaluated 1, 6, and 12 months postoperatively. RESULTS: Fear of observation, performance anxiety and embarrassment were alleviated and alertness increased. Likewise, palpitations, trembling of hands and heads, blushing and hyperhidrosis were relieved. All changes were statistically significant. Patients’ satisfaction was high and remained stable over time. Gender, age, and education did not influence satisfaction rates. CONCLUSIONS: Endoscopic sympathicotomy and endoscopic sympathetic block strongly influence typical symptoms of patients with social phobia.
JournalEuropean Surgery
Volume 37, Number 3 / June, 2005
http://www.springerlink.com/content/w986882515290647/
JournalEuropean Surgery
Volume 37, Number 3 / June, 2005
http://www.springerlink.com/content/w986882515290647/
sympathectomy induces several biochemical changes in skeletal muscle
It is concluded that sympathectomy induces several biochemical changes in skeletal muscle which constitute a change and increase in fast myosin light chain synthesis and a corresponding fibre type transformation.
Received 24 August 1987; accepted 26 October 1987
Received 24 August 1987; accepted 26 October 1987
Clinical Physiology and Functional Imaging
"We have previously reported functional and histological studies in five beagle dogs with unilateral lumbar sympathectomy. Three months later, fatiguability in the gracilis muscles was increased on the denervated sides, and this was associated with an increase in the relative distribution of FT fibres. Biochemical studies now show that these changes were associated with an increase in cytosolic protein without change in DNA content; this is consistent with an increase in cell size. There was a reduction in the proportion of slow myosin light chain isoforms from 50 +/- 7 to 34 +/- 6%. Noradrenaline levels were increased on the denervated sides but this may reflect greater vascularity. Calcium content did not correlate with fibre type but there was a positive relation with both noradrenaline content (r = 0.73; P less than 0.05) and DNA content (r = 0.84; P less than 0.05). It is concluded that sympathectomy induces several biochemical changes in skeletal muscle which constitute a change and increase in fast myosin light chain synthesis and a corresponding fibre type transformation."
Journal: Clinical physiology (Oxford, England) (Clin Physiol), published in ENGLAND.
Reference: 1988-Apr; vol 8 (issue 2) : pp 181-91
Dates: Created 1988/06/08; Completed 1988/06/08; Revised 2004/11/17;
PMID: 3359751, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )
sympathectomy leading to an extracranial steal phenomenon.
The incidence and extension of brain infarcts was increased in animals with additional ipsilateral cervical preganglionic sympathectomy. Sympathectomy did not affect markedly the respiration and systemic circulation. The effect of sympathectomy was attributed to a cutaneous vasodilation, leading to an extracranial steal phenomenon.
J Neurol Neurosurg Psychiatry. 1983 August; 46(8): 768–773.
J Neurol Neurosurg Psychiatry. 1983 August; 46(8): 768–773.
increased blood flow after sympathectomy is due to increased nonnutritive AVA flow
In the acute canine model, increased blood flow after sympathectomy is due to increased nonnutritive arteriovenous anastomoses (AVA) flow, with no change in total hindlimb capillary flow, both at rest and during reactive hyperemia.
Surgery. 1977 Jul;82(1):82-9.
90 % of patients experienced severe compensatory sweating
Postsurgery, severe compensatory sweating was experienced in 90% of patients (P < 0.0001). The sites of
compensatory sweating were the back (75%), abdomen (51%), feet (23%), groin and thigh (13%), chest (13%), andaxillae (8%). Transient whole-body sweating for no apparent reason was experienced in 30% of patients.
Thirty-seven patients (11%) regretted having undergone the surgical procedure.
Main outcome measures included the incidence of dry hands, compensatory sweating, chest pain, upper-limb muscle weakness, shortness of breath, and gustatory phenomena;
Surg Laparosc Endosc Percutan Tech. 2000 Aug;10(4):226-9.
compensatory sweating were the back (75%), abdomen (51%), feet (23%), groin and thigh (13%), chest (13%), andaxillae (8%). Transient whole-body sweating for no apparent reason was experienced in 30% of patients.
Thirty-seven patients (11%) regretted having undergone the surgical procedure.
Main outcome measures included the incidence of dry hands, compensatory sweating, chest pain, upper-limb muscle weakness, shortness of breath, and gustatory phenomena;
Surg Laparosc Endosc Percutan Tech. 2000 Aug;10(4):226-9.
Sympathectomy controversial procedure, so why is it advertised as a life-style surgery?
The treatment of facial blushing and or facial sweating is a controversial subject. The uncontrolled and embarrassing situation of facial sweating and blushing was thought to be easily treated with ETS. This came about when ETS was done for patients with sweaty hands. Among those patients who also suffered from facial blushing and/or facial sweating the results were also successful at reducing facial blushing and/or sweating. However over the years two observations were made when this operation was applied only for patients with facial blushing and or facial sweating. Percentage wise these patients developed a higher rate of severe compensatory sweating. Also these patients experienced a higher degree of dissatisfaction due to the side effects. Side effects such as facial flushed feelings, loss of stamina, facial skin sensitivity, increased amount of fatigue and others led Dr. Reisfeld to the decision not to perform ETS when only facial blushing or facial sweating were involved. The clinical experience that was accumulated over the last several years is what has allowed Dr. Reisfeld to reach this assessment. More time is needed to reach a definite conclusion with regard to the most appropriate procedure for patients who suffer from only facial blushing and/or facial sweating.
http://www.sweaty-palms.com/blushing.html
http://www.sweaty-palms.com/blushing.html
Wednesday, May 25, 2011
Melatonin production abolished after sympathectomy for palmar hyperhidrosis
The amount of 6-sulphatoxymelatonin, the chief metabolite of melatonin, in the urine was measured in nine patients, who were subjected to
bilateral sympathectomy at the second thoracic ganglionic level for treatment of hyperhidrosis of the palms. All patients showed before surgery had a normal 6-sulphatoxymelatonin excretion with a peak in the excretion during the night time. After the sympathectomy, the high night time excretion
Melatonin
Melatonin is an important immunomodulator and is the principal means by which tissues are synchronized to the daily cycle of light exposure and physical activity. Cortisol, on the other hand, is critical for maintaining energy homeostasis and modulating immune function. Melatonin and cortisol tend to run opposite to each other. That is, cortisol approaches its low point at bedtime, whereas melatonin reaches its peak a few hours after cortisol bottoms out (see Figure 1 below). Deviations from the normal patterns for these hormones can have significant implications for overall health and future risk of cancer. In fact, research shows that low melatonin and high cortisol are independently associated with some of the same health conditions.
Consequently, the balance between these two hormones is important to overall good health. The melatonin-cortisol index (MCI)s an innovative way of examining the balance between these two vital hormones. The MCI may be used to assess cancer risk and immune function, and may also aid in the assessment of depression, heart disease, osteoporosis and weight management issues.
Melatonin | Rocky Mountain Analytical Lab
http://www.rmalab.com/index.php?id=61
bilateral sympathectomy at the second thoracic ganglionic level for treatment of hyperhidrosis of the palms. All patients showed before surgery had a normal 6-sulphatoxymelatonin excretion with a peak in the excretion during the night time. After the sympathectomy, the high night time excretion
was clearly abolished in five patients but remained high in four patients. This indicates that the segmental locations of the preganglionic sympathetic perikarya in the spinal cord, stimulating the melatonin secretion in the pineal gland in humans, vary between individuals.
© 2006 Elsevier Ireland Ltd. All rights reserved.
Molecular and Cellular Endocrinology 252 (2006) 40–45
Melatonin
Melatonin is an important immunomodulator and is the principal means by which tissues are synchronized to the daily cycle of light exposure and physical activity. Cortisol, on the other hand, is critical for maintaining energy homeostasis and modulating immune function. Melatonin and cortisol tend to run opposite to each other. That is, cortisol approaches its low point at bedtime, whereas melatonin reaches its peak a few hours after cortisol bottoms out (see Figure 1 below). Deviations from the normal patterns for these hormones can have significant implications for overall health and future risk of cancer. In fact, research shows that low melatonin and high cortisol are independently associated with some of the same health conditions.
Consequently, the balance between these two hormones is important to overall good health. The melatonin-cortisol index (MCI)s an innovative way of examining the balance between these two vital hormones. The MCI may be used to assess cancer risk and immune function, and may also aid in the assessment of depression, heart disease, osteoporosis and weight management issues.
Melatonin | Rocky Mountain Analytical Lab
http://www.rmalab.com/index.php?id=61
Vasoconstrictor responses to immersion of the hand in ice water in the sympathetically denervated forearm were abolished
Vasoconstrictor responses to immersion of the hand in ice water in the sympathetically denervated forearm were abolished; during the second minute of the cold pressor test, vascular resistance had increased by 48±20 percent in the innervated limb, whereas it had decreased by 17±5 percent in the denervated limb (P<0.02> limbs). Figs. 1 and 2
show that L-NMMA infusion evoked a roughly 3-fold larger increase in vascular resistance in the denervated forearm than in the innervated calf. In the forearm, vascular resistance increased by 58±10 percent during L-NMMA infusion whereas in the calf, it increased only by 21±6 percent (P<0.001, forearm vs. calf). The L-NMMA induced vasoconstriction was reversed by L-arginine, but not by D-arginine, infusion (Table 1). In contrast to L-NMMA, infusion of an equipressive dose of phenylephrine increased the vascular resistance comparably in the denervated and the innervated limb (by 24±3 and 26±7 percent, respectively; P>0.5, forearm vs. calf).
Here we used subjects having undergone thoracic sympathectomy for hyperhydrosis, to probe the role of the peripheral sympathetic nervous system in the modulation of the vascular responsiveness to nitric oxide synthase inhibition. We found that sympathectomy markedly potentiated the vasoconstrictor effect of L-NMMA infusion. The L-NMMA induced vasoconstrictor effect was almost three times larger in the denervated than in the innervated limb. These findings provide the first evidence for an important interplay between the peripheral sympathetic nervous system and the L-arginine–nitric-oxide system in the regulation of the vascular tone in humans, and indicate that sympathetic innervation attenuates the vasoconstrictor effect of nitric oxide synthase inhibition.
Cardiovascular Research 1999 43(3):739-743; doi:10.1016/S0008-6363(99)00084-X
© 1999 by European Society of Cardiology
Here we used subjects having undergone thoracic sympathectomy for hyperhydrosis, to probe the role of the peripheral sympathetic nervous system in the modulation of the vascular responsiveness to nitric oxide synthase inhibition. We found that sympathectomy markedly potentiated the vasoconstrictor effect of L-NMMA infusion. The L-NMMA induced vasoconstrictor effect was almost three times larger in the denervated than in the innervated limb. These findings provide the first evidence for an important interplay between the peripheral sympathetic nervous system and the L-arginine–nitric-oxide system in the regulation of the vascular tone in humans, and indicate that sympathetic innervation attenuates the vasoconstrictor effect of nitric oxide synthase inhibition.
Cardiovascular Research 1999 43(3):739-743; doi:10.1016/S0008-6363(99)00084-X
© 1999 by European Society of Cardiology
Norepinephrine response to mental challenge
DS Goldstein, G Eisenhofer, FL Sax, HR Keiser and IJ Kopin
Hypertension-Endocrine Branch, National Heart, Lung, and Blood Institute, Bethesda, MD 20892.
We simultaneously infused tracer-labeled norepinephrine (NE) and isoproterenol (ISO) intravenously into 14 subjects to measure forearm and total body NE pharmacokinetics at rest and in response to mental challenge (video game or cognitive task). Mental challenge was associated with significantly increased heart rate (24%), systolic blood pressure (13%), cardiac output (impedance cardiography, 9%), forearm blood flow (38%), and the rate of release of endogenous NE into arterial blood (total body NE spillover, 29%), but not with changes in cardiac output (r = 0.68) and systolic blood pressure (r = 0.60), whereas those of antecubital venous NE were not. Forearm extraction of NE was related inversely to forearm blood flow both at rest (r = -0.80) and during mental challenge (r = -0.81), and total body clearance of NE was positively related to cardiac output at rest (r = 0.78) and during mental challenge (r = 0.54). The results indicate that mental challenge is associated with generally increased sympathetically-mediated NE release that determines the hemodynamic responses. Because of regional changes in sympathetic activity and blood flow during psychological stress, changes in antecubital venous NE and even arterial NE may not reflect accurately sympathetic nerve activity. Measurement of total body and regional NE pharmacokinetics avoids these difficulties.
Psychosomatic Medicine, Vol 49, Issue 6 591-605, Copyright © 1987 by American Psychosomatic Society
Hypertension-Endocrine Branch, National Heart, Lung, and Blood Institute, Bethesda, MD 20892.
We simultaneously infused tracer-labeled norepinephrine (NE) and isoproterenol (ISO) intravenously into 14 subjects to measure forearm and total body NE pharmacokinetics at rest and in response to mental challenge (video game or cognitive task). Mental challenge was associated with significantly increased heart rate (24%), systolic blood pressure (13%), cardiac output (impedance cardiography, 9%), forearm blood flow (38%), and the rate of release of endogenous NE into arterial blood (total body NE spillover, 29%), but not with changes in cardiac output (r = 0.68) and systolic blood pressure (r = 0.60), whereas those of antecubital venous NE were not. Forearm extraction of NE was related inversely to forearm blood flow both at rest (r = -0.80) and during mental challenge (r = -0.81), and total body clearance of NE was positively related to cardiac output at rest (r = 0.78) and during mental challenge (r = 0.54). The results indicate that mental challenge is associated with generally increased sympathetically-mediated NE release that determines the hemodynamic responses. Because of regional changes in sympathetic activity and blood flow during psychological stress, changes in antecubital venous NE and even arterial NE may not reflect accurately sympathetic nerve activity. Measurement of total body and regional NE pharmacokinetics avoids these difficulties.
Psychosomatic Medicine, Vol 49, Issue 6 591-605, Copyright © 1987 by American Psychosomatic Society
it determines the contribution of the extraparenchymal arteries tooverall cerebral blood flow autoregulation
Immediately following experimentation the cerebral vessels were examined for the presence of noradrenergic fibers. The results of the study demonstrate that: (1) superior cervical ganglionectomy produces a significant reduction in the noradrenergic innervation of ipsilateral extraparenchymal arteries; (2) the peripheral sympathetic nervous system contributes to overall cerebral vascular resistance primarily by affecting resistance in extraparenchymal arteries; and (3) as a result, it determines the contribution of the extraparenchymal arteries to overall cerebral blood flow autoregulation.
1975;6;284-292 Stroke
1975;6;284-292 Stroke
Exaggerated responses to drugs after sympathectomy
Exaggerated responses to drugs following nervous system lesions were described in the medical literature more than a century ago. Although the phenomenon of supersensitivity is still not completely understood, studies in experimental animals have clarified the distinction between denervation and decentralization (for review see Trendelenberg, 1963). These characteristic pharmacologic abnormalities form the basis for distinguishing pre-, and post-ganglionic noradrenergic involvement.
Chronic postgangliionic denervation increases the pressor response to NA, while the effects of indirect symphatomimetics are reduced. Decentralization causes more modest changes in the blood pressure response and is not associated with loss of neuronal NA stores; the increase in pressor sensitivity is non-specific.
Disorders of the Autonomic Nervous System
Chronic postgangliionic denervation increases the pressor response to NA, while the effects of indirect symphatomimetics are reduced. Decentralization causes more modest changes in the blood pressure response and is not associated with loss of neuronal NA stores; the increase in pressor sensitivity is non-specific.
Disorders of the Autonomic Nervous System
By David Robertson, Italo Biaggioni
Published by Informa Health Care, 1995
ISBN 3718651467, 9783718651467
Sunday, May 22, 2011
Sympathectomy considered a last resort or end-of-the-road treatment
Surgical sympathectomy has been advocated for patients who do not get permanent pain relief from blocks and is somewhat of a last resort or end-of-the-road treatment. (p.469)
By Bruce D. Browner
Skeletal trauma: basic science, management, and reconstruction, Volume 1
Elsevier Health Sciences, 2003 - 2768 pagesBy Bruce D. Browner
"Sympathectomy is another animal."
Sympathectomy. This is a radical, now-controversial approach to blocking pain, and it includes extremely high risks for additional tissue damage and spread of RSD. (p.40)
Sympathectomy also potentially precludes future new treatments from working. (p.41)
A recent review article by (Johns Hopkins Hospital anesthesiologist and medical school professor) Srinivasa Raja covering all previous articles on sympathectomy showed that 10 percent of sympathectomies done for various reasons have complications. The complication rate for sympathectomy done to treat neuropathic (i.e., RSD) pain is 30 percent. A lot of these people can have a return of pain, and if they do, you can no longer do a sympathetic block to get rid of it. Then you have got these people in terrible pain that you cannot treat. And so, in my book, surgical sympathectomy is out. (p.81)
Hunter House, 2004
Sympathectomy also potentially precludes future new treatments from working. (p.41)
A recent review article by (Johns Hopkins Hospital anesthesiologist and medical school professor) Srinivasa Raja covering all previous articles on sympathectomy showed that 10 percent of sympathectomies done for various reasons have complications. The complication rate for sympathectomy done to treat neuropathic (i.e., RSD) pain is 30 percent. A lot of these people can have a return of pain, and if they do, you can no longer do a sympathetic block to get rid of it. Then you have got these people in terrible pain that you cannot treat. And so, in my book, surgical sympathectomy is out. (p.81)
Positive Options for Reflex Sympathetic Dystrophy (RSD):
Elena Juriscerebral edema following CO2 insufflation during sympathectomy
Death after thoracoscopic sympathectomy has been reported, secondary to cerebral edema, when CO2 insufflation has been employed. Another patient in this series sustained severe neurological dysfunction, secondary to cerebral edema. The development of cerebral edema after thoracoscopic sympathectomy is attributable to gas insufflation, which is not required and should be avoided. Major vascular injury during thoracoscopic sympathectomy has also been reported, and this complication should be completely avoidable. Chylothorax after sympathectomy has also been described and is related to division of accessory ducts rather than injury to the thoracic duct.
The most common complications of sympathectomy are related to manipulation of the autonomic nervous system.
Injury to the stellate ganglion is caused by mechanical or thermal damage to T1 during dissection. In order to prevent this injury, precise identification of ribs 1-4 is required prior to dissection of the sympathetic ganglion at T2; no dissection is performed above this level. Furthermore, excessive nerve traction is avoided during dissection. Finally, the use of bipolar cautery or ultrasonic dissection will prevent current diffusion to the stellate ganglion.
Neuralgia along the ulnar aspect of the upper limb may occur after sympathectomy, which usually resolves within 6 weeks. (p.250)
The most common complications of sympathectomy are related to manipulation of the autonomic nervous system.
Injury to the stellate ganglion is caused by mechanical or thermal damage to T1 during dissection. In order to prevent this injury, precise identification of ribs 1-4 is required prior to dissection of the sympathetic ganglion at T2; no dissection is performed above this level. Furthermore, excessive nerve traction is avoided during dissection. Finally, the use of bipolar cautery or ultrasonic dissection will prevent current diffusion to the stellate ganglion.
Neuralgia along the ulnar aspect of the upper limb may occur after sympathectomy, which usually resolves within 6 weeks. (p.250)
Complications in cardiothoracic surgery: avoidance and treatment
By Alex G. Little
Wiley-Blackwell, 2004 - Medical - 454 pagesCompensatory hyperhidrosis reported in 0% to 74.5% of cases
Compensatory hyperhidrosis is the most common and unpredictable side effect of thoracoscopic sympathectomy and is reported to occur in 0% to 74.5% of cases. (p.555)
Elsevier Health Sciences, 2001
Elsevier Health Sciences, 2001
Saturday, May 21, 2011
Patient feedback often differs from how the surgeons describe sympathectomy and the impact it can have
I read absolutely all of the comments and Im frankly disappointed nobody has found a feasible cure for CS, which is absolutely destroying my life. I figure I shared with some of you pre-ops and post-ops the side effects I have experienced. I am 22 years old and had surgery exactly 1 year ago. I had cauterization of the Sympathethic nerve bilaterally at the T2 level for facial blushing.
1. CS concentrated in the thorax and groin area
2. Lack of sweat from the nipple up.
3. EXTREMLY dry hands that have turned me completely USELESS when handling objects (even paper)
4. Arthritis in the hands.
5. Neuralgia in the site of cauterization
6. Goosebumps feelings when eating sweet things.
7. ALLERGIC REACTION in forehead when eating highly condimented food
8. EXTREMELY ALLERGIC REACTION in forehead when eating spicy food.
9. Hypersensitivity to cold weather leading to goosebumps
10. Phantom sweating
11. Reduced workout output
Essentially, Ive had ALL the possible side effects :/ except for the pneumothorax, collapsed lung, and raynauds. My immune system was not able to cope with the surgery and absolutely when ape sh1t. I wake up everyday thinking how am gonna be able to live through the rest of years I have on me with the hell ETS has caused in me. Our bodies is the only tool we are given in this life, and we should PROTECT IT at all instances to be able to cope with life. For those considering ETS, (specially males), I truly recommend you to restrain from ETS surgery if you value the most magnificent tool ever invented: the human body.
http://etsandreversals.yuku.com/topic/4773/master/1/
1. CS concentrated in the thorax and groin area
2. Lack of sweat from the nipple up.
3. EXTREMLY dry hands that have turned me completely USELESS when handling objects (even paper)
4. Arthritis in the hands.
5. Neuralgia in the site of cauterization
6. Goosebumps feelings when eating sweet things.
7. ALLERGIC REACTION in forehead when eating highly condimented food
8. EXTREMELY ALLERGIC REACTION in forehead when eating spicy food.
9. Hypersensitivity to cold weather leading to goosebumps
10. Phantom sweating
11. Reduced workout output
Essentially, Ive had ALL the possible side effects :/ except for the pneumothorax, collapsed lung, and raynauds. My immune system was not able to cope with the surgery and absolutely when ape sh1t. I wake up everyday thinking how am gonna be able to live through the rest of years I have on me with the hell ETS has caused in me. Our bodies is the only tool we are given in this life, and we should PROTECT IT at all instances to be able to cope with life. For those considering ETS, (specially males), I truly recommend you to restrain from ETS surgery if you value the most magnificent tool ever invented: the human body.
http://etsandreversals.yuku.com/topic/4773/master/1/
Density of calcitonin gene-related peptide immunoreactive fibers in sympathectomy side of the lumbar dura mater decreased to 45.5%
Results: In the hot-plate analgesia test, sympathectomized rats increased their hot-plate latency time compared with that of sham-operated rats. Density of calcitonin gene-related peptide immunoreactive fibers in sympathectomy side of the lumbar dura mater decreased to 45.5% compared with the contralateral side. The number and size of calcitonin gene-related peptide immunoreactive cells in dorsal root ganglia showed no difference between sympathectomized and contralateral side.
Conclusion: Sympathectomy increased the pain threshold and made the sympathectomized rats hypesthetic.
An Anatomic Study of Neuropeptide Immunoreactivities in the Lumbar Dura Mater After Lumbar Sympathectomy.
Spine. 21(8):925-930, April 15, 1996.
Sekiguchi, Yasufumi MD *+; Konnai, Yasunobu MD *+; Kikuchi, Shinichi MD, PhD *; Sugiura, Yasuo MD, PhD +
Conclusion: Sympathectomy increased the pain threshold and made the sympathectomized rats hypesthetic.
An Anatomic Study of Neuropeptide Immunoreactivities in the Lumbar Dura Mater After Lumbar Sympathectomy.
Spine. 21(8):925-930, April 15, 1996.
Sekiguchi, Yasufumi MD *+; Konnai, Yasunobu MD *+; Kikuchi, Shinichi MD, PhD *; Sugiura, Yasuo MD, PhD +
Sympathectomy has a beta-blocker effect on the healthy patient
Cardiovascular changes after bilateral upper dorsal sympathectomy.
Papa MZ, Bass A, Schneiderman J, Drori Y, Tucker E, Adar R."The effect of bilateral upper dorsal sympathectomy (UDS) on cardiac function was investigated in two groups of young healthy patients who underwent bilateral excision of T2 and T3 ganglia for palmar hyperhidrosis.
The mean pulse rate decreased significantly in patients after they underwent bilateral UDS.
Pulse rates taken at rest and after effort were significantly lower than those taken after operation, and the blood pressure response to exercise was blunted. ECG tracings showed a significant change in the electrical frontal plane axis and shortening of
the QTc interval. These changes were evident 30 days after operation and persisted for 2 years. In conclusion, bilateral UDS has no overt arrhythmogenic effect in the young, healthy heart and its beta-blocker-like effect persists for at least 2 years." (the time of the tests performed)
http://www.ncbi.nlm.nih.gov/pubmed/3789841
Beta blockers block the action of endogenous catecholamines (epinephrine (adrenaline) and norepinephrine (noradrenaline) in particular), on β-adrenergic receptors, part of the sympathetic nervous system which mediates the fight or flight response.
The increase in heart rate in response to HUT (head-up tilt) was significantly reduced after surgery in the ETS group (from 34 ± 18 to 14 ± 11 beats·min−1). Orthostatic hypertension disappeared completely after ETS , whereas the prevalence of orthostatic hypotension increased significantly after ETS (from 3 of 11 to 9 of 11 patients).
http://www.springerlink.com/content/dk8tq89wnhq4naqy/
NIH Clinical Studies book includes Sympahtectomy among Neurocardiologic disorders
Perhaps everyone considering ETS surgery should see this: the National Institute of Health (NIH) Clinical Studies book, where sympathectomy is listed as a "Neurocardiologic Disorder", right along side Parkinson's Disease, etc.
http://www.truthaboutets.com/Pages/NIH.html
I think it is fair to assume that of the thousands of people who have undergone sympathectomy for excessive sweating or facial blushing, few if any of them understood they were consigning themselves to a permanent autonomic system disorder.
http://www.truthaboutets.com/Pages/NIH.html
I think it is fair to assume that of the thousands of people who have undergone sympathectomy for excessive sweating or facial blushing, few if any of them understood they were consigning themselves to a permanent autonomic system disorder.
sympathectomy caused a shift of sympathovagal balance toward parasympathetic tone
Endoscopic transthoracic sympathicotomy is a recently developed technique to reduce pain and ischemia in patients with severe angina pectoris.
ETS caused a shift of sympathovagal balance toward parasympathetic tone.
The American Journal of Cardiology
Volume 79, Issue 11, 1 June 1997, Pages 1447-1452
ETS caused a shift of sympathovagal balance toward parasympathetic tone.
The American Journal of Cardiology
Volume 79, Issue 11, 1 June 1997, Pages 1447-1452
cerebral autoregulation was impaired
CBF increased significantly after the elevation of systemic blood pressure compared with that in the control group, and cerebral autoregulation was impaired. After a 1-hour study, the specific gravity of the cerebral tissue in the treated group significantly decreased; electron microscopic studies at that time revealed brain edema. It is suggested that depletion of brain noradrenaline levels causes a disturbance in cerebral microvascular tone and renders the cerebral blood vessels more vulnerable to hypertension.
J Neurosurg. 1991 Dec;75(6):906-10.
J Neurosurg. 1991 Dec;75(6):906-10.
Supersensitivity to noradrenaline and chronic neuropathic pain conditions
Supersensitivity to noradrenaline contributes to certain vascular disorders (e.g., hypertension) and chronic neuropathic pain conditions (e.g., complex regional pain syndrome). We aimed to develop a procedure for inducing adrenergic supersensitivity that could be used to investigate the role of catecholamines in these clinical conditions.
These observations indicate that prolonged depletion of adrenergic stores by guanethidine induces adrenergic supersensitivity in cutaneous vessels, and that adrenergic supersensitivity enhances thermal hyperalgesia in the presence of noradrenaline.
Autonomic Neuroscience
Volume 88, Issues 1-2, 12 April 2001, Pages 86-93
Darren M. Lipnicki and Peter D. Drummond
, 
These observations indicate that prolonged depletion of adrenergic stores by guanethidine induces adrenergic supersensitivity in cutaneous vessels, and that adrenergic supersensitivity enhances thermal hyperalgesia in the presence of noradrenaline.
Autonomic Neuroscience
Volume 88, Issues 1-2, 12 April 2001, Pages 86-93
Darren M. Lipnicki and Peter D. Drummond
School of Psychology, Murdoch University, Murdoch, Western Australia 6150, Australia
90 % of patients experienced severe compensatory sweating
Postsurgery, severe compensatory sweating was experienced in 90% of patients (P < 0.0001). The sites of
compensatory sweating were the back (75%), abdomen (51%), feet (23%), groin and thigh (13%), chest (13%), andaxillae (8%). Transient whole-body sweating for no apparent reason was experienced in 30% of patients.
Thirty-seven patients (11%) regretted having undergone the surgical procedure.
Main outcome measures included the incidence of dry hands, compensatory sweating, chest pain, upper-limb muscle weakness, shortness of breath, and gustatory phenomena;
Surg Laparosc Endosc Percutan Tech. 2000 Aug;10(4):226-9.
compensatory sweating were the back (75%), abdomen (51%), feet (23%), groin and thigh (13%), chest (13%), andaxillae (8%). Transient whole-body sweating for no apparent reason was experienced in 30% of patients.
Thirty-seven patients (11%) regretted having undergone the surgical procedure.
Main outcome measures included the incidence of dry hands, compensatory sweating, chest pain, upper-limb muscle weakness, shortness of breath, and gustatory phenomena;
Surg Laparosc Endosc Percutan Tech. 2000 Aug;10(4):226-9.
collateral effects of thoracic sympathectomy not disclosed to patients
Several reports also demonstrate significantly lower heart rate increases during exercise in subjects who have undergone bilateral ISS [9–12] compared to pre-surgical levels. In spite of this high occurrence, recent reviews on the usual collateral effects of thoracic sympathectomy still do not include these possible cardiac consequences [6].
Eur J Cardiothorac Surg 2001;20:1095-1100
Eur J Cardiothorac Surg 2001;20:1095-1100
36% intense 'compensatory sweating'
The results and complication rates have not necessarily been similar in reports worldwide. This can be explained in part due to the lack of clear-cut definitions for the indications, success, complications, side effects, and short- and long-term follow-up data of the procedures. It is well known that sympathectomy is often complicated by CH; the reported incidence rates vary greatly from 30% to 84% [15]. In our series it has been noted in 62.5% of the patients (26.5% moderate and 36% intense).
Although VATS sympathectomy is a simple and quick procedure, unusual complications such as chylothorax may occur [16]. However, lethal or potentially serious complications have also been reported [8, 17, 18], such as subclavian artery injury, damage to brachial plexus, large hemothorax, cerebral edema, neurologic sequelae, sinus bradycardia, and cardiac arrest.
Ann Thorac Surg 2003;76:886-891
Although VATS sympathectomy is a simple and quick procedure, unusual complications such as chylothorax may occur [16]. However, lethal or potentially serious complications have also been reported [8, 17, 18], such as subclavian artery injury, damage to brachial plexus, large hemothorax, cerebral edema, neurologic sequelae, sinus bradycardia, and cardiac arrest.
Ann Thorac Surg 2003;76:886-891
73% of patients suffered form 'gustatory sweating' and variety of phenomena
In a series of 100 bilateral upper dorsal sympathectomies performed for palmar hyperhidrosis,
gustatory sweating and other gustatory phenomena were reported by 68 of 93 patients (73%),
followed up for an average of 11/2 years. These gustatory phenomena were quite different from
physiologic gustatory sweating: a wide range of gustatory stimuli caused a variety of phenomena in
varied locations. There was a negative correlation between the incidence of these phenomena and the
occurrence of Horner's syndrome after sympathectomy. Analysis of our observations, and of clinical
and experimental work of others, leads to the conclusion that gustatory phenomena after upper
dorsal sympathectomy are the result of preganglionic sympathetic regeneration or collateral sprouting
with aberrant synapses in the superior cervical ganglion.
•
Arch Neurol. 1977;34(10):619-623.
gustatory sweating and other gustatory phenomena were reported by 68 of 93 patients (73%),
followed up for an average of 11/2 years. These gustatory phenomena were quite different from
physiologic gustatory sweating: a wide range of gustatory stimuli caused a variety of phenomena in
varied locations. There was a negative correlation between the incidence of these phenomena and the
occurrence of Horner's syndrome after sympathectomy. Analysis of our observations, and of clinical
and experimental work of others, leads to the conclusion that gustatory phenomena after upper
dorsal sympathectomy are the result of preganglionic sympathetic regeneration or collateral sprouting
with aberrant synapses in the superior cervical ganglion.
•
Arch Neurol. 1977;34(10):619-623.
Thursday, May 19, 2011
most of the existing literature is geared towards assessing only the effectiveness of the surgical sympathectomy
Given the fact that most of the existing literature is geared towards a) assessing only the effectiveness of the surgical sympathectomy procedures, and b) publishing only studies with positive results, adverse effects and complications are not systematically reported but rather as a secondary outcome. It seems, therefore, highly likely that the complications as reported here, are truly underestimated.
The study indicates that surgical sympathectomy, irrespective of operative approach and indication, may be associated with many and potentially serious complications.
The study indicates that surgical sympathectomy, irrespective of operative approach and indication, may be associated with many and potentially serious complications.
Are We Paying a High Price for Surgical Sympathectomy? A Systematic Literature Review of Late Complications
http://www.jpain.org/article/S1526-5900%2800%2944124-6/abstract
Collagen types I and III mRNA were decreased respectively by 53% and 22% after sympathectomy
In the present study, we tested the hypothesis of the indirect (via the sympathetic nervous system (SNS)) and direct (via AT1 receptors) contributions of Angiotensin II (Ang II) on the synthesis of collagen types I and III in the left ventricle (LV) in vivo. Sympathectomy and blockade of the Ang II receptor AT1 were performed alone or in combination in normotensive rats. The mRNA and protein synthesis of collagen types I and III were examined by Q-RT-PCR and immunoblotting in the LV.
Collagen types I and III mRNA were decreased respectively by 53% and 22% after sympathectomy and only collagen type I mRNA was increased by 52% after AT1 receptor blockade. mRNA was not changed for collagen type I but was decreased by 25% for collagen type III after double treatment. Only collagen protein type III was decreased after sympathectomy by 12%, but collagen proteins were increased respectively for types I and III by 145% and 52% after AT1 receptor blockade and by 45% and 60% after double treatment. Deducted interpretations from our experimental approach suggest that Ang II stimulates indirectly (via SNS) and inhibits directly (via AT1 receptors) the collagen type I at transcriptional and protein levels. For collagen type III, it stimulates indirectly the transcription and inhibited directly the protein level. Therefore, the Ang II regulates collagen synthesis differently through indirect and direct pathways.
http://www.autonomicneuroscience.com/article/S1566-0702(09)00416-0/abstract
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