Document Detail


Nitric oxide-mediated cutaneous microvascular function is impaired in polycystic ovary sydrome but can be improved by exercise training.
MedLine Citation:
PMID:  23318877     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polycystic ovary syndrome (PCOS) is associated with cardiovascular disease. The contribution of the nitric oxide (NO) dilator system to cutaneous endothelial dysfunction is currently unknown in PCOS. Our aim was to examine whether women with PCOS demonstrate impaired cutaneous microvascular NO function and whether exercise training can ameliorate any impairment. Eleven women with PCOS (age, 29 ± 7 years; body mass index, 34 ± 6 kg m(-2)) were compared with six healthy obese control women (age, 29 ± 7 years; body mass index, 34 ± 5 kg m(-2)). Six women with PCOS (30 ± 7 years; 31 ± 6 kg m(-2)) then completed 16 weeks of exercise training. Laser Doppler flowmetry, combined with intradermal microdialysis of l-N(G)-monomethyl-l-arginine, a nitric oxide antagonist, in response to incremental local heating of the forearm was assessed in women with PCOS and control women, and again in women with PCOS following exercise training. Cardiorespiratory fitness, homeostasis model assessment for insulin resistance, hormone and lipid profiles were also assessed. Differences between women with PCOS and control women and changes with exercise were analysed using Student's unpaired t tests. Differences in the contribution of NO to cutaneous blood flow [expressed as a percentage of maximal cutaneous vasodilatation (CVCmax)] were analysed using general linear models. At 42°C heating, cutaneous NO-mediated vasodilatation was attenuated by 17.5%CVCmax (95% confidence interval, 33.3, 1.7; P = 0.03) in women with PCOS vs. control women. Exercise training improved cardiorespiratory fitness by 5.0 ml kg(-1) min(-1) (95% confidence interval, 0.9, 9.2; P = 0.03) and NO-mediated cutaneous vasodilatation at 42°C heating by 19.6% CVCmax (95% confidence interval, 4.3, 34.9; P = 0.02). Cutaneous microvascular NO function is impaired in women with PCOS compared with obese matched control women but can be improved with exercise training.
Authors:
V S Sprung; D J Cuthbertson; C J A Pugh; C Daousi; G Atkinson; N F Aziz; G J Kemp; D J Green; N T Cable; H Jones
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-01-14
Journal Detail:
Title:  The Journal of physiology     Volume:  591     ISSN:  1469-7793     ISO Abbreviation:  J. Physiol. (Lond.)     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-03-18     Completed Date:  2013-08-30     Revised Date:  2014-03-26    
Medline Journal Info:
Nlm Unique ID:  0266262     Medline TA:  J Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1475-87     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Case-Control Studies
Enzyme Inhibitors / pharmacology
Exercise*
Exercise Therapy
Female
Heart Diseases / etiology,  prevention & control
Heart Function Tests
Hot Temperature
Humans
Insulin Resistance
Laser-Doppler Flowmetry
Lipoproteins, LDL / blood
Microdialysis
Microvessels / physiopathology*
Nitric Oxide / metabolism*
Polycystic Ovary Syndrome / complications,  metabolism,  physiopathology*,  therapy
Regional Blood Flow / drug effects,  physiology
Skin / blood supply
Vasodilation / drug effects,  physiology*
omega-N-Methylarginine / pharmacology
Chemical
Reg. No./Substance:
0/Enzyme Inhibitors; 0/Lipoproteins, LDL; 27JT06E6GR/omega-N-Methylarginine; 31C4KY9ESH/Nitric Oxide
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