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Hepatic IGF-1R overexpression combined with the activation of GSK-3β and FOXO3a in the development of liver cirrhosis

Author:
Liu, Wentao, Li, Jing, Cai, Yan, Wu, Qiong, Pan, Yue, Chen, Yang, Chen, Yujing, Zheng, Xiao, Li, Wei, Zhang, Xuewen, E, Changyong
Source:
Life sciences 2016 v.147 pp. 97-102
ISSN:
0024-3205
Subject:
blood serum, carbon tetrachloride, enzyme-linked immunosorbent assay, histology, hospitals, humans, insulin, insulin-like growth factor I, insulin-like growth factor I receptor, intraperitoneal injection, liver, liver cirrhosis, liver neoplasms, mice, models, parenchyma (animal tissue), patients, signal transduction, staining, tau-protein kinase, tissue banks, China
Abstract:
Liver cirrhosis is the common pathological histology manifest among a number of chronic liver diseases and liver cancer. Circulating levels of insulin growth factor-1 (IGF-1) have been recently linked to liver cirrhosis and the development of liver cancer. Herein, we hypothesized that IGF-1R overexpression combining the activation of GSK-3β and FOXO3a were involved in the development of human and murine chronic liver cirrhosis.Liver samples of patients were screened from the Tissue Bank of the China-Japan Union Hospital of Jilin University. Mice liver fibrosis model was performed using intraperitoneal injection of carbon tetrachloride (CCl4) for 12weeks. Serum IGF-1 levels were detected by enzyme-linked immunosorbent assays (ELISA). Microscopical examination of liver parenchyma was performed using conventional H&E and Masson's staining. Moreover, we investigated the IGF-1 receptor (IGF-1R) signaling pathway at different period after CCl4 administration.Serum IGF-1 levels were significantly decreased in patients with liver cirrhosis, which is concomitant with the declined circulating levels of IGF-1 in 8 to 12weeks CCl4-treated mice. Furthermore, the expression of IGF-1R was significantly higher at 12w compared with control group. In addition, activation of the GSK-3β and FOXO3a were activated during the process of murine chronic liver injury.The present study demonstrates that decreased circulating IGF-1 levels are involved in human and murine chronic liver disease. Interestingly, overexpression of the IGF-1R, and activation of GSK3β and FOXO3a might be the molecular mechanisms underlying the development of liver cirrhosis.
Agid:
6063092