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Cited by 283Ovarian function and disordersMetabolism, Diabetes, and CancerDiabetes, Cardiovascular Risks, and Lipoproteins

The DOI matches its Crossref record; 56 of the 57 references it cites were found in a registry or an index.

Insulin resistance in the skeletal muscle of women with PCOS involves intrinsic and acquired defects in insulin signaling

Corbould, Anne, Kim, Young-Bum, Youngren, Jack F., Pender, Celia, Kahn, Barbara B., Lee, Anna, Dunaif, Andrea·2005·American Journal of Physiology-Endocrinology and Metabolism
DOI 10.1152/ajpendo.00361.2004
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Abstract

Insulin resistance in polycystic ovary syndrome (PCOS) is due to a postbinding defect in signaling that persists in cultured skin fibroblasts and is associated with constitutive serine phosphorylation of the insulin receptor (IR). Cultured skeletal muscle from obese women with PCOS and age- and body mass index-matched control women ( n = 10/group) was studied to determine whether signaling defects observed in this tissue in vivo were intrinsic or acquired. Basal and insulin-stimulated glucose transport and GLUT1 abundance were significantly increased in cultured myotubes from women with PCOS. Neither IR β-subunit abundance and tyrosine autophosphorylation nor insulin receptor substrate (IRS)-1-associated phosphatidylinositol (PI) 3-kinase activity differed in the two groups. However, IRS-1 protein abundance was significantly increased in PCOS, resulting in significantly decreased PI 3-kinase activity when normalized for IRS-1. Phosphorylation of IRS-1 on Ser 312 , a key regulatory site, was significantly increased in PCOS, which may have contributed to this signaling defect. Insulin signaling via IRS-2 was also decreased in myotubes from women with PCOS. In summary, decreased insulin-stimulated glucose uptake in PCOS skeletal muscle in vivo is an acquired defect. Nevertheless, there are intrinsic abnormalities in glucose transport and insulin signaling in myotubes from affected women, including increased phosphorylation of IRS-1 Ser 312 , that may confer increased susceptibility to insulin resistance-inducing factors in the in vivo environment. These abnormalities differ from those reported in other insulin resistant states consistent with the hypothesis that PCOS is a genetically unique disorder conferring an increased risk for type 2 diabetes.

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Crossref · 10.1152/ajpendo.00361.2004

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Metadata

Authors
Corbould, A., Kim, Y.-B., Youngren, J. F., Pender, C., Kahn, B. B., Lee, A., & Dunaif, A.
Affiliations
  • Brigham and Women's Hospital (US)
  • Harvard University (US)
  • University of California, San Francisco (US)
ORCID
Venue
American Journal of Physiology-Endocrinology and Metabolism
Publisher
American Physiological Society
Published
2005-05
Volume
288
Issue
5
Pages
E1047-E1054
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
DOI
10.1152/ajpendo.00361.2004
OpenAlex
W2152304127
Cited by
283
References
57
Citations by year
2026: 11 · 2025: 14 · 2024: 10 · 2023: 18 · 2022: 15 · 2021: 17 · 2020: 22 · 2019: 11 · 2018: 10 · 2017: 5 · 2016: 11 · 2015: 12 · 2014: 14 · 2013: 11 · 2012: 14
FWCI
12.34
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK057521, R01 DK43051, R01DK040605, P30DK57521, R01 DK-40605, R01DK043051)
  • National Center for Research Resources (RR02635, M01RR002635)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (U54-HD34449, U54HD034449)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
polycystic ovary syndrome, insulin resistance, skeletal muscle, insulin signaling, insulin receptor, insulin receptor substrate 2, PI3-kinase, glucose transport, GLUT1, myotubes, type 2 diabetes risk
MeSH terms
Adult, Cells, Cultured, Female, Glucose, Humans, Insulin, Insulin Resistance, Polycystic Ovary Syndrome, Receptor, Insulin, Signal Transduction, Muscle, Skeletal, Muscle Fibers, Skeletal

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