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- W2062792783 abstract "Lipolytic catecholamine resistance in sc fat cells is observed in polycystic ovarian syndrome (PCOS). The mechanisms behind this lipolysis defect were explored in vitro; sc fat cells were obtained from 10 young, nonobese PCOS women and from 14 matched, healthy control women. Fasting plasma glycerol levels were reduced by one third in PCOS (P < 0.05). Adipocytes of PCOS women were about 25% larger than in the controls (P < 0.05) and had 40% reduced noradrenaline-induced lipolysis (P < 0.05), which could be attributed to a 10-fold decreased beta(2)-adrenoceptor sensitivity (P < 0.05) and low ability of cAMP to activate the protein kinase A (PKA)/hormone-sensitive lipase (HSL) complex (P < 0.05). In PCOS, the adipocyte protein content of beta(2)-adrenoceptors, HSL, and the regulatory II beta-component of PKA were 70%, 55%, and 25% decreased, respectively (P < 0.001); but there was no change in the amount of the catalytic subunit of PKA or of beta(1)-adrenoceptors. Thus, lipolytic catecholamine resistance of sc adipocytes in PCOS is probably attributable to a combination of decreased amounts of beta(2)-adrenergic receptors, the regulatory II beta-component of PKA, and HSL. This may cause low in vivo lipolytic activity and enlarged sc fat cell size and promote later development of obesity in PCOS." @default.
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- W2062792783 date "2003-05-01" @default.
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- W2062792783 title "Mechanisms behind Lipolytic Catecholamine Resistance of Subcutaneous Fat Cells in the Polycystic Ovarian Syndrome" @default.
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- W2062792783 doi "https://doi.org/10.1210/jc.2002-021573" @default.
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