“Hope” for the liver? Mechanistic insight into the role of the renin‐angiotensin system in hepatic fibrosis
Gavin E. Arteel – 30 June 2004 – Angiotensin II (AngII) is a pro‐oxidant and fibrogenic cytokine. We investigated the role of NADPH oxidase in AngII‐induced effects in hepatic stellate cells (HSCs), a fibrogenic cell type. Human HSCs express mRNAs of key components of nonphagocytic NADPH oxidase. AngII phosphorylated p47phox, a regulatory subunit of NADPH oxidase, and induced reactive oxygen species formation via NADPH oxidase activity. AngII phosphorylated AKT and MAPKs and increased AP‐1 DNA binding in a redox‐sensitive manner.