The role of thrombospondin-1-mediated TGF-β1 on collagen type III synthesis induced by high glucose.

Abstract:

:Transforming growth factor-β1 (TGF-β1) has been thought to play a major role during cardiac fibrosis in the development of diabetic cardiomyopathy, and cardiac fibrosis mainly as a result of an increase of collagen type III occurs in the human hearts with diabetes. Thrombospondin-1 (TSP-1) has been reported to activate the latent complex of TGF-β1. We examined the effects of TSP-1 on the expression of TGF-β1 and collagen type III by rat cardiac fibroblasts in high ambient glucose. We demonstrated that high glucose induces the mRNA and protein expression of collagen type III, TGF-β1, and TSP-1. Furthermore, the mRNA and protein expression of collagen type III induced by high glucose was downregulated after treatment with TGF-β1 antibody, or TSP-1 siRNA. The expression of TGF-β1 increased by high glucose was also reversed after treatment with TSP-1 siRNA. Our findings suggest that the TSP-1 participates in the upregulation of TGF-β1, collagen type III by high glucose and may provide new therapeutic strategies for diabetic cardiomyopathy.

journal_name

Mol Cell Biochem

authors

Tang M,Zhou F,Zhang W,Guo Z,Shang Y,Lu H,Lu R,Zhang Y,Chen Y,Zhong M

doi

10.1007/s11010-010-0590-7

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

49-56

issue

1-2

eissn

0300-8177

issn

1573-4919

journal_volume

346

pub_type

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