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- W2103887497 abstract "OBJECTIVE—Women with gestational diabetes mellitus (GDM) demonstrate chronic and progressive insulin resistance and a markedly increased risk of converting to type 2 diabetes after pregnancy. However, the cellular mechanisms underlying this insulin resistance are unknown. RESEARCH DESIGN AND METHODS—We investigated the progression of insulin resistance in nine obese women with GDM during late pregnancy (30–36 weeks) and 1 year postpartum. Skeletal muscle biopsies were obtained at each visit, and insulin resistance was determined by the hyperinsulinemic-euglycemic clamp technique. RESULTS—Insulin resistance was not significantly improved in GDM women (4.1 ± 0.4 vs. 5.8 ± 1.1 10−2 mg · kg FFM · min−1/μU · ml−1). Subjects did not experience significant weight loss postpartum. Body weight, fat mass, fasting glucose, and plasma tumor necrosis factor (TNF)-α remained higher 1 year postpartum than seen in previously studied normal glucose-tolerant women. Skeletal muscle TNF-α mRNA was elevated five- to sixfold in GDM women and remained higher 1 year postpartum. While levels of insulin receptor (IR), IR substrate (IRS)-1, and p85α improved postpartum, insulin-stimulated IR tyrosine phosphorylation and receptor tyrosine kinase activity did not significantly improve postpartum in GDM. The levels of 312Ser-IRS-1 also did not improve postpartum and correlated with TNF-α mRNA (r2 = 0.19, P < 0.03), consistent with a state of subclinical inflammation and chronic skeletal muscle insulin resistance. CONCLUSIONS—These results suggest the mechanisms underlying chronic insulin resistance in GDM women may be driven by increased inflammation that impinges on the IR and IRS-1 signaling cascade in skeletal muscle. These findings have important implications for the health of GDM women during subsequent pregnancies and their risk for progression to type 2 diabetes." @default.
- W2103887497 created "2016-06-24" @default.
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- W2103887497 date "2008-03-01" @default.
- W2103887497 modified "2023-10-16" @default.
- W2103887497 title "Increased Skeletal Muscle Tumor Necrosis Factor-α and Impaired Insulin Signaling Persist in Obese Women With Gestational Diabetes Mellitus 1 Year Postpartum" @default.
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- W2103887497 doi "https://doi.org/10.2337/db07-1356" @default.
- W2103887497 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4697130" @default.
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- W2103887497 hasPublicationYear "2008" @default.
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