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Insulin Down-regulates Resistin MRNA Through the Synthesis of Protein(s) That Could Accelerate the Degradation of Resistin MRNA in 3T3-L1 Adipocytes

Overview
Journal Diabetologia
Specialty Endocrinology
Date 2003 Mar 11
PMID 12627322
Citations 11
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Abstract

Aims/hypothesis: Resistin is a peptide secreted by adipocytes and recognized as a hormone that could link obesity to insulin resistance. This study was designed to examine the effect and mechanism(s) of insulin on resistin expression in 3T3-L1 adipocytes.

Methods: Differentiated 3T3-L1 adipocytes were stimulated with insulin and resistin mRNA expression was examined by Northern blot analysis. In some experiments, the insulin signal was blocked by several chemical inhibitors or overexpression of a dominant negative form (Deltap85) of the p85 subunit of phosphatidylinositol 3-kinase (PI 3-kinase).

Results: Insulin treatment caused a reduction of resistin mRNA in time-dependent and dose-dependent manners in 3T3-L1 adipocytes. Pre-treatment with PD98059, an inhibitor of extracellular signal-regulated kinase 1/2 (ERK1/2) pathway, or SB203580, an inhibitor of p38 mitogen-activated protein-kinase (p38 MAP-kinase) pathway, did not influence insulin-induced reduction of resistin mRNA. Inhibition of PI 3-kinase by LY294002 or Deltap85 also failed to block insulin-induced reduction of resistin mRNA. Cycloheximide, a protein synthesis inhibitor, completely blocked insulin-induced reduction of resistin mRNA. Actinomycin D, a RNA synthesis inhibitor, also blocked insulin-induced reduction of resistin mRNA, and the decreasing rate of resistin mRNA in cells treated with insulin alone was faster than that with actinomycin D.

Conclusion/interpretation: Insulin downregulates resistin mRNA via PI 3-kinase, ERK or p38 MAP-kinase independent pathways in 3T3-L1 adipocytes. The downregulation mechanism of resistin mRNA by insulin would be an indirect event through the synthesis of novel protein(s) that could accelerate the degradation of resistin mRNA.

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References
1.
Saltiel A . Series introduction: the molecular and physiological basis of insulin resistance: emerging implications for metabolic and cardiovascular diseases. J Clin Invest. 2000; 106(2):163-4. PMC: 314314. DOI: 10.1172/JCI10533. View

2.
Coffer P, van Puijenbroek A, Burgering B, Koenderman L, Bos J, Kruijer W . Insulin activates Stat3 independently of p21ras-ERK and PI-3K signal transduction. Oncogene. 1997; 15(21):2529-39. DOI: 10.1038/sj.onc.1201429. View

3.
Hotamisligil G, Shargill N, Spiegelman B . Adipose expression of tumor necrosis factor-alpha: direct role in obesity-linked insulin resistance. Science. 1993; 259(5091):87-91. DOI: 10.1126/science.7678183. View

4.
Shojima N, Sakoda H, Ogihara T, Fujishiro M, Katagiri H, Anai M . Humoral regulation of resistin expression in 3T3-L1 and mouse adipose cells. Diabetes. 2002; 51(6):1737-44. DOI: 10.2337/diabetes.51.6.1737. View

5.
Kahn B, Flier J . Obesity and insulin resistance. J Clin Invest. 2000; 106(4):473-81. PMC: 380258. DOI: 10.1172/JCI10842. View