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  • Title: Follistatin and activins in polycystic ovary syndrome: relationship to metabolic and hormonal markers.
    Author: Teede H, Ng S, Hedger M, Moran L.
    Journal: Metabolism; 2013 Oct; 62(10):1394-400. PubMed ID: 23768911.
    Abstract:
    OBJECTIVE: Polycystic ovary syndrome (PCOS) is common and has reproductive and metabolic manifestations. Activin A and follistatin levels remain controversial and activin B levels are unstudied in PCOS. The aim of this study was to evaluate activin A, activin B and follistatin levels and to examine their associations with metabolic status in overweight and obese women with and without PCOS. MATERIALS AND METHODS: Cross-sectional study assessing overweight and obese, premenopausal women with PCOS (n=51, n=26 National Institutes of Health (NIH) and n=25 non-NIH) and without PCOS (n=25 controls). Outcomes included activin A, activin B, follistatin and activin A/follistatin ratio and the association of the activins and follistatin with metabolic variables. RESULTS: Activin A, activin B and activin A/follistatin ratio were not significantly different and follistatin was elevated for PCOS versus controls (P=0.01) independent of age or BMI. Follistatin levels were significantly different across the PCOS phenotypes (p=0.05), however this was a non-significant trend (after correction for age and BMI) for women with NIH PCOS or non-NIH PCOS to have elevated levels in comparison to controls. Activin A was most strongly predicted by low density lipoprotein/high density lipoprotein (r(2)=0.192, p<0.001), follistatin by triglycerides and highly sensitive C-reactive protein (r(2)=0.340, p<0.001) and the activin A/follistatin ratio by insulin area under the curve and mean arterial pressure (r(2)=0.289, p<0.001). CONCLUSIONS: Follistatin is elevated and activins A and B are not different between PCOS and controls. Follistatin and activin A are related to metabolic parameters in women with and without PCOS. Follistatin may potentially act as a marker of or be involved in the pathophysiology of both reproductive and metabolic features of PCOS.
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