Document Detail


Aerobic exercise training improves atrial natriuretic peptide and catecholamine-mediated lipolysis in obese women with polycystic ovary syndrome.
MedLine Citation:
PMID:  19366845     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: The aim was to investigate the impact of polycystic ovary syndrome (PCOS) on the regulation of lipolysis by catecholamine and for the first time atrial natriuretic peptide (ANP) before and after 16 wk of aerobic training. PATIENTS: Eight hyperandrogenic obese women with PCOS [age, 25 +/- 1 yr; body mass index (BMI), 32.0 +/- 1.6 kg/m(2)] and seven healthy BMI-matched controls participated. Studies were performed before and after a 16-wk exercise training program in women with PCOS and cross-sectionally in a group of BMI-matched controls. MAIN OUTCOME MEASURES: Lipolysis was measured in vitro in isolated adipocytes and in vivo by microdialysis of sc abdominal adipose tissue before and during a hyperinsulinemic euglycemic clamp. RESULTS: In vitro, baseline and maximal ANP- and isoproterenol-induced lipolysis was markedly reduced in PCOS women. Baseline (P < 0.001) and ANP-(P < 0.01) and isoproterenol-(P < 0.001) mediated lipolysis, however, was remarkably increased after training, independent of changes in body weight and sex hormones. These functional improvements were supported by an increased 1) lipolytic sensitivity for ANP (1.3-fold; P < 0.05); 2) lipolytic responsiveness for isoproterenol (1.7-fold; P < 0.01); and 3) postreceptor-acting agent dibutyryl-cAMP (activating cAMP-dependent protein kinase) (2.1-fold; P < 0.05). In vivo, the lipolytic responsiveness to isoproterenol was also reduced in PCOS and tended to increase after exercise training. The insulin suppression of lipolysis during the hyperinsulinemic euglycemic clamp was also reduced in PCOS. CONCLUSIONS: Together, these data show that the regulation of lipolysis by the main endocrine hormones is impaired in women with PCOS. These lipolytic defects can be partly reversed by aerobic exercise training independent of changes in body fat mass and sex hormones.
Authors:
Cedric Moro; Magdalena Pasarica; Karen Elkind-Hirsch; Leanne M Redman
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article     Date:  2009-04-14
Journal Detail:
Title:  The Journal of clinical endocrinology and metabolism     Volume:  94     ISSN:  1945-7197     ISO Abbreviation:  J. Clin. Endocrinol. Metab.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-07-08     Completed Date:  2009-08-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375362     Medline TA:  J Clin Endocrinol Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2579-86     Citation Subset:  AIM; IM    
Affiliation:
Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Atrial Natriuretic Factor / pharmacology*
Body Mass Index
Catecholamines / pharmacology*
Exercise / physiology*
Exercise Therapy
Female
Glucose Clamp Technique
Humans
Insulin / pharmacology
Isoproterenol / pharmacology
Lipolysis / drug effects*,  physiology
Microdialysis
Obesity / complications,  metabolism,  therapy*
Polycystic Ovary Syndrome / complications,  metabolism,  therapy*
Young Adult
Chemical
Reg. No./Substance:
0/Catecholamines; 11061-68-0/Insulin; 7683-59-2/Isoproterenol; 85637-73-6/Atrial Natriuretic Factor

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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