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Insulin-like growth factor binding protein-related protein 1 contributes to hepatic fibrogenesis.

Abstract：

OBJECTIVE:The aim of this study was to investigate the role of insulin-like growth factor binding protein-related protein 1 (IGFBP-rP1) in the development of hepatic fibrogenesis in experimental disease models and human liver samples. METHODS:Cellular distribution patterns of IGFBP-rP1 were assessed by immunohistochemistry in fibrotic and cirrhotic human liver specimens. Gene silencing of IGFBP-rP1 was performed on cultured hepatic stellate cells (HSCs) by small interfering RNA (siRNA), and the silencing effect was determined by quantitative real-time polymerase chain reaction (PCR) and Western blot. We also determined the effects of siRNA-mediated gene silencing of IGFBP-rP1 on the production of extracellular matrix (ECM) components by Western blot. The expression of ECM components and transforming growth factor (TGF)-β1 was studied by immunohistochemistry and Western blot in C57BL/6 wild-type mice treated with recombinant IGFBP-rP1 (rIGFBP-rP1). RESULTS:Expression of IGFBP-rP1 was significantly elevated in fibrotic and cirrhotic human liver specimens, and this increase was positively correlated with the number of collagen fibers observed. siRNA-mediated gene silencing of IGFBP-rP1 resulted in significantly decreased levels of collagen I and fibronectin in HSCs. Moreover, IGFBP-rP1 overexpression significantly increased the production of collagen, fibronectin and TGF-β1 in rIGFBP-rP1-treated mice. CONCLUSIONS:IGFBP-rP1 contributes to the development of liver fibrosis and may be a novel molecule involved in the progression of hepatic fibrogenesis.

journal_name

J Dig Dis

journal_title

Journal of digestive diseases

authors

Guo XH,Liu LX,Zhang HY,Zhang QQ,Li Y,Tian XX,Qiu ZH

doi

10.1111/1751-2980.12126

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

202-10

issue

4

eissn

1751-2972

issn

1751-2980

journal_volume

15

pub_type

杂志文章

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