Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

The Phosphorylation of IRS1(S307) and Akt(S473) Molecules in Insulin-Resistant C2C12 Cells Induced with Palmitate Is Influenced by Epigallocatechin Gallate from Green Tea

(2019) The Phosphorylation of IRS1(S307) and Akt(S473) Molecules in Insulin-Resistant C2C12 Cells Induced with Palmitate Is Influenced by Epigallocatechin Gallate from Green Tea. Lipids. pp. 141-148. ISSN 0024-4201

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Abstract

In the current investigation, the effect of epigallocatechin gallate (EGCG) on the phosphorylation of IRS1(S307) and Akt(S473) molecules in insulin-resistant C2C12 muscle cells induced with palmitate was studied and compared with the effect of the antidiabetic drug, rosiglitazone. C2C12 myoblasts were cultured in Dulbecco's modified Eagle's medium and differentiated into myotubes using horse serum and the creatine kinase test was used to confirm their differentiation. The treatment of C2C12 myotubes was carried out with palmitate, where albumin was used as the conjugator. The Western blot technique was used to check the useful phosphorylation of IRS1(S307) and Akt(S473) in C2C12 myotubes, in the presence or absence of palmitate. There was a significant (p < 0.00) and linear increase in the activity of creatine kinase over time (0 to 96 h after differentiation) with everyday myoblast formation. While neither EGCG nor rosiglitazone showed a significant (p > 0.05) effect on palmitate content during 96 h of incubation of IRS1(S307), EGCG alone or combined with rosiglitazone increased the phosphorylation of Akt(S473), leading to the increase of glucose uptake into C2C12 cells. Thus, it can be concluded that EGCG alone or in combination with rosiglitazone may show some therapeutic effects for the prevention or treatment of Type 2 diabetes owing to its substantial effect on increasing the phosphorylation of Akt(S473) and the subsequent glucose uptake into the cells.

Item Type: Article
Keywords: Akt(S473) Epigallocatechin gallate (EGCG) IRS1(S307) Rosiglitazone Type 2 diabetes protein-tyrosine phosphatases type-2 diabetes-mellitus free fatty-acids skeletal-muscle rosiglitazone treatment glycemic control adipose-tissue sensitivity glucose pgc-1-alpha Biochemistry & Molecular Biology Nutrition & Dietetics
Page Range: pp. 141-148
Journal or Publication Title: Lipids
Journal Index: ISI
Volume: 54
Number: 2-3
Identification Number: https://doi.org/10.1002/lipd.12133
ISSN: 0024-4201
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/2260

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