Down-Regulated Receptor Interacting Protein 140 Is Involved in Lipopolysaccharide-Preconditioning-Induced Inactivation of Kupffer Cells and Attenuation of Hepatic Ischemia Reperfusion Injury

• Published in: PloS one Vol. 11; no. 10; p. e0164217
• Main Authors: Yuan, Guo, Yu, You, Ji, Li, Jie, Xu, Yue, Li, Kang, Yang, Jianping, Gong, Zuojin, Liu
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 10.10.2016; Public Library of Science (PLoS)
• Subjects: Adaptor Proteins, Signal Transducing - antagonists & inhibitors; Adaptor Proteins, Signal Transducing - genetics; Adaptor Proteins, Signal Transducing - metabolism; Animals; Attenuation; Biology and Life Sciences; Cytokines; Deactivation; Down-Regulation - drug effects; Enzyme-Linked Immunosorbent Assay; Enzymes; Gene expression; Inactivation; Inflammation; Injuries; Interleukin-1beta - blood; Interleukin-6 - blood; Ischemia; Kupffer cells; Kupffer Cells - cytology; Kupffer Cells - drug effects; Kupffer Cells - metabolism; Lipopolysaccharides; Lipopolysaccharides - toxicity; Liver; Liver - metabolism; Liver - pathology; Male; Medicine and Health Sciences; Microscopy, Fluorescence; Mitogens; NF-kappa B - metabolism; NF-κB protein; Nuclear Proteins - antagonists & inhibitors; Nuclear Proteins - genetics; Nuclear Proteins - metabolism; Preconditioning; Proteins; Rats; Rats, Sprague-Dawley; Reperfusion; Reperfusion Injury - metabolism; Reperfusion Injury - pathology; Research and Analysis Methods; RNA Interference; RNA, Small Interfering - metabolism; Rodents; Signal Transduction - drug effects; siRNA; Studies; Surgery; Transplants & implants; Tumor Necrosis Factor-alpha - blood; Tumor necrosis factor-TNF; China
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0164217

Lipopolysaccharide (LPS) preconditioning is known to attenuate hepatic ischemia/reperfusion injury (I/RI); however, the precise mechanism remains unclear. This study investigated the role of receptor-interacting protein 140 (RIP140) on the protective effect of LPS preconditioning in hepatic I/RI involving Kupffer cells (KCs). Sprague-Dawley rats underwent 70% hepatic ischemia for 90 minutes. LPS (100 μg/kg) was injected intraperitoneally 24 hours before ischemia. Hepatic injury was observed using serum and liver samples. The LPS/NF-κB (nuclear factor-κB) pathway and hepatic RIP140 expression in isolated KCs were investigated. LPS preconditioning significantly inhibited hepatic RIP140 expression, NF-κB activation, and serum proinflammatory cytokine expression after I/RI, with an observation of remarkably reduced serum enzyme levels and histopathologic scores. Our experiments showed that protection effects could be effectively induced in KCs by LPS preconditioning, but couldn't when RIP140 was overexpressed in KCs. Conversely, even without LPS preconditioning, protective effects were found in KCs if RIP140 expression was suppressed with siRNA. Down-regulated RIP140 is involved in LPS-induced inactivation of KCs and hepatic I/RI attenuation.