Subcutaneous adipocytes from obese hyperinsulinemic women with polycystic ovary syndrome exhibit normal insulin sensitivity but reduced maximal insulin responsiveness
2005 (English)In: European Journal of Endocrinology, ISSN 0804-4643, Vol. 153, no 6, 831-835 p.Article in journal (Refereed) Published
Background: Polycystic ovary syndrome (PCOS) has a high prevalence in women and is often associated with insulin resistance and hence with aspects of the so-called metabolic syndrome. Methods: Ten women diagnosed with PCOS were consecutively included (aged 21-39 years, average 30.2±1.9 years, body mass index 28.4-42.5 kg/m2, average 37.5±1.7 kg/m2 (mean±S.E.)). Adipocytes were isolated from the subcutaneous fat and, after overnight incubation to recover from insulin resistance due to the surgical cell isolation procedures, they were analyzed for insulin sensitivity. Results: The patients with PCOS exhibited marked clinical hyperinsulinemia with 3.6-fold higher blood levels of C-peptide than a healthy lean control group (1.7±0.2 and 0.5±0.02 nmol/l respectively, P < 0.0001). The patients with PCOS also exhibited 2.4-fold higher concentrations of serum triacylglycerol (2.1±0.3 and 0.9±0.06 mmol/l respectively, P < 0.0001), but only slightly elevated blood pressure (118±12/76±6 and 113±7/72±6 mmHg respectively, P = 0.055/0.046). However, insulin sensitivity for stimulation of glucose transport in the isolated adipocytes was indistinguishable from a non-PCOS, non-diabetic control group, while the maximal insulin effect on glucose uptake was significantly lower (2.2±0.2- and 3.8±0.8-fold respectively, P = 0.02). Conclusions: Subcutaneous adipocytes from patients with PCOS do not display reduced insulin sensitivity. The findings show that the insulin resistance of PCOS is qualitatively different from that of type 2 diabetes. © 2005 Society of the European Journal of Endocrinology.
Place, publisher, year, edition, pages
2005. Vol. 153, no 6, 831-835 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-31484DOI: 10.1530/eje.1.02027Local ID: 17276OAI: oai:DiVA.org:liu-31484DiVA: diva2:252307