GCN2 kinase is a key regulator of fibrogenesis and acute and chronic liver injury induced by carbon tetrachloride in mice

被引：18

作者：

Arriazu, Elena ^{[1
]}

Ruiz de Galarreta, Marina ^{[1
]}

Lopez-Zabalza, Maria J. ^{[1
]}

Leung, Tung Ming ^{[2
]}

Nieto, Natalia ^{[2
]}

Iraburu, Maria J. ^{[1
]}

机构：

[1] Univ Navarra, Dept Bioquim & Biol Mol, E-31080 Pamplona, Spain

[2] Mt Sinai Sch Med, Dept Med, Div Liver Dis, New York, NY USA

来源：

LABORATORY INVESTIGATION | 2013年 / 93卷 / 03期

关键词：

collagen type I; fibrosis; hepatic stellate cells; HEPATIC STELLATE CELLS; ALPHA-1(I) COLLAGEN GENE; AMINO-ACID DEPRIVATION; HUMAN LUNG FIBROBLASTS; PROTEIN-SYNTHESIS; TRANSFER-RNA; DEPENDENT MECHANISM; HYDROGEN-PEROXIDE; OXIDATIVE STRESS; MESSENGER-RNA;

D O I：

10.1038/labinvest.2012.173

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

100103 [病原生物学]; 100218 [急诊医学];

摘要：

General control nonderepresible 2 (GCN2) is a highly conserved cytosolic kinase that modulates a complex response for coping with the stress owing to lack of amino acids. GCN2 has been recently shown to be involved in the regulation of metabolic balance and lipid degradation rate in the liver. We hypothesized that GCN2 could have a role in in hepatic fibrogenesis and in the response to acute or chronic liver injury. Activation of GCN2 in primary or immortalized human hepatic stellate cells by incubation with medium lacking the essential amino acid histidine correlated with decreased levels of collagen type I protein and mRNA, suggesting an antifibrogenic effect of GCN2. In vivo studies with Gcn2 knockout mice (Gcn2(-/-)) showed increased susceptibility to both acute or chronic liver damage induced by CCl4, as shown by higher alanine aminotransferase and aspartate aminotransferase activities, increased necrosis and higher inflammatory infiltrates compared with wild-type mice (WT). Chronic CCl4 treatment increased deposition of interstitial collagen type I more in Gcn2(-/-) mice than in WT mice. Col1a1 and col1a2 mRNA levels also increased in CCl4-treated Gcn2(-/-) mice compared with WT mice. These results suggest that GCN2 is a key regulator of the fibrogenic response to liver injury. Laboratory Investigation (2013) 93, 303-310; doi:10.1038/labinvest.2012.173; published online 14 January 2013

引用

页码：303 / 310

页数：8

共 34 条

[1]

RETRACTED: Hepatic CYP3A Suppression by High Concentrations of Proteasomal Inhibitors: A Consequence of Endoplasmic Reticulum (ER) Stress Induction, Activation of RNA-Dependent Protein Kinase-Like ER-Bound Eukaryotic Initiation Factor 2α (eIF2α)-Kinase (PERK) and General Control Nonderepressible-2 eIF2α Kinase (GCN2), and Global Translational Shutoff (Retracted article. See vol. 100, pg. 82, 2021) [J].