TY - JOUR
T1 - Nitric oxide-mediated cutaneous microvascular function is impaired in polycystic ovary sydrome but can be improved by exercise training
AU - Sprung, V. S.
AU - Cuthbertson, D. J.
AU - Pugh, C. J.A.
AU - Daousi, C.
AU - Atkinson, G.
AU - Aziz, N. F.
AU - Kemp, G. J.
AU - Green, D. J.
AU - Cable, N. T.
AU - Jones, H.
PY - 2013/3/1
Y1 - 2013/3/1
N2 - 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-NG-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.
AB - 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-NG-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.
UR - http://www.scopus.com/inward/record.url?scp=84875059486&partnerID=8YFLogxK
U2 - 10.1113/jphysiol.2012.246918
DO - 10.1113/jphysiol.2012.246918
M3 - Article
C2 - 23318877
AN - SCOPUS:84875059486
SN - 0022-3751
VL - 591
SP - 1475
EP - 1487
JO - Journal of Physiology
JF - Journal of Physiology
IS - 6
ER -
