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- W1888335775 abstract "Women with polycystic ovary syndrome (PCOS) are insulin resistant secondary to a postbinding defect in insulin signaling. Sequential euglycemic glucose clamp studies at 40 and 400 mU. m(-2). min(-1) insulin doses with serial skeletal muscle biopsies were performed in PCOS and age-, weight-, and ethnicity-matched control women. Steady-state insulin levels did not differ, but insulin-mediated glucose disposal was significantly decreased in PCOS women (P < 0.05). Insulin receptor substrate (IRS)-1-associated phosphatidylinositol 3-kinase (PI 3K) activity was significantly decreased in PCOS (n = 12) compared with control skeletal muscle (n = 8; P < 0.05). There was no significant difference in the abundance of IR, IRS-1, or the p85 regulatory subunit of PI 3K in PCOS (n = 14) compared with control (n = 12) muscle. The abundance of IRS-2 was significantly increased (P < 0.05) in PCOS skeletal muscle, suggesting a compensatory change. We conclude that there is a physiologically relevant defect in insulin receptor signaling in PCOS that is independent of obesity and type 2 diabetes mellitus." @default.
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- W1888335775 date "2001-08-01" @default.
- W1888335775 modified "2023-10-18" @default.
- W1888335775 title "Defects in insulin receptor signaling in vivo in the polycystic ovary syndrome (PCOS)" @default.
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- W1888335775 doi "https://doi.org/10.1152/ajpendo.2001.281.2.e392" @default.
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