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Molecular and Cellular Biochemistry

, Volume 345, Issue 1–2, pp 45–52 | Cite as

SOCS3 inhibits insulin signaling in porcine primary adipocytes

  • Shuang-Juan Yang
  • Cheng-Quan Xu
  • Jiang-Wei Wu
  • Gong-She YangEmail author
Article

Abstract

Insulin resistance is a major player in the pathogenesis of type II diabetes, the metabolic syndrome, and obesity. SOCS3 plays an important role in the development of insulin resistance. To investigate the role of SOCS3 in porcine adipocyte insulin signaling, we first detected the effect of insulin on SOCS3 mRNA and protein expression in porcine primary adipocytes by real-time RT-PCR and Western blotting. Then, we constructed a recombinant adenovirus encoding SOCS3 gene (Ad-SOCS3) which was used to infect differentiated porcine primary adipocytes for 3 days. The expression and phosphorylation of main insulin signaling components were detected by Western blotting. The results showed that 100 nM insulin could induce SOCS3 mRNA expression but not protein expression, and overexpression of SOCS3 decreased IRS1 protein level, insulin-stimulated IRS1 tyrosine phosphorylation, PI3K activation, and Akt phosphorylation, but increased IRS1 serine phosphorylation in porcine primary adipocytes. These results indicate that SOCS3 is an important negative regulator of insulin signaling in porcine adipocytes. Thus, SOCS3 may be a novel therapeutic target for the prevention or treatment of insulin resistance and type II diabetes.

Keywords

SOCS3 Insulin signaling Porcine primary adipocytes Phosphorylation 

Notes

Acknowledgments

This study was supported by The National High Technology Research and Development Program (No. 2006AA10Z138) and Key and Specific National Project for Creating New Biological Species Transgenically (No. 2008ZX08006-005) of China. We thank Dr. Bin Wu and Dr. J. Gale for their suggestions and correction of the English manuscript.

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Copyright information

© Springer Science+Business Media, LLC. 2010

Authors and Affiliations

  • Shuang-Juan Yang
    • 1
  • Cheng-Quan Xu
    • 1
  • Jiang-Wei Wu
    • 1
  • Gong-She Yang
    • 1
    Email author
  1. 1.Laboratory of Animal Fat Deposition and Muscle Development, College of Animal Science and TechnologyNorthwest A&F UniversityYanglingPeople’s Republic of China

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