GRK2 mediates cisplatin-induced acute liver injury via the modulation of NOX4

• Published in: Cell biology and toxicology 2024-11, Vol.40 (1), p.98, Article 98
• Main Authors: Wang, Qianlei, Li, Mengyang, Duan, Fei, Xiao, Kangjun, Sun, Qing Qing, Cheng, Jiang rui, Ni, Lei, Xu, Zhengkun, Xu, Bingfa, Xiao, Feng, Kuai, Jiajie, Wei, Wei, Wang, Chun
• Format: Article
• Language: English
• Subjects: Alanine; Alanine transaminase; Animal models; Animals; Apoptosis; Apoptosis - drug effects; Aspartate aminotransferase; b-Adrenergic-receptor kinase; Biochemistry; Biomedical and Life Sciences; Blood levels; Cell Biology; Cell Line; Chemical and Drug Induced Liver Injury - metabolism; Cisplatin; Cisplatin - pharmacology; Disease Models, Animal; Drug development; Drug therapy; Endoplasmic reticulum; Endoplasmic Reticulum Chaperone BiP; Endoplasmic Reticulum Stress - drug effects; G protein-coupled receptor kinase; G protein-coupled receptor kinase 2; G-Protein-Coupled Receptor Kinase 2 - genetics; G-Protein-Coupled Receptor Kinase 2 - metabolism; Glutathione; Hepatocytes; Histopathology; Injury prevention; Kinases; Life Sciences; Liver; Liver - drug effects; Liver - metabolism; Liver - pathology; Male; Mice; Mice, Inbred C57BL; NAD(P)H oxidase; NADPH Oxidase 4 - genetics; NADPH Oxidase 4 - metabolism; NOX4 protein; Oxidative stress; Oxidative Stress - drug effects; Paroxetine; Pharmacology; Pharmacology/Toxicology; Reactive oxygen species; siRNA; Transaminases; Transfection
• ISSN: 1573-6822; 0742-2091; 1573-6822
• DOI: 10.1007/s10565-024-09940-y

Background The present study investigated the function of G protein-coupled receptor kinase 2 (GRK2) in acute liver injury (ALI) by cisplatin, and investigated the protective effect of pharmacological inhibition of GRK2. Methods ALI models were generated in global adult hemizygous (ALI- Grk2 ± ) mice and wild-type (WT) mice. Liver biochemistry parameters and histopathology were used to evaluate the severity of ALI and the protective effect of pharmacological inhibition of GRK2. GRK2-siRNA was used to knock down the expression of GRK2 in AML12 cells in vitro . Results ALI model mice exhibited increased blood levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels and abnormal liver pathology accompanied by imbalanced L-glutathione (GSH) levels. Cisplatin administration upregulated GKR2, p-GRK2 and NADPH oxidase 4 (NOX4) expression in the liver tissues of ALI model mice. Compared to WT mice injected with cisplatin, Grk2 ± mice that received cisplatin showed significant improvements in liver function and pathological performance, decreased NOX4 levels, reduced endoplasmic reticulum (ER) stress, and diminished liver cell apoptosis. In vitro, the transfection of AML12 cells with siRNA significantly reduced NOX4 expression and inhibited cisplatin-induced reactive oxygen species production, ER stress (increased levels of GRP94, GRP78, p-elF2α and CHOP) and apoptotic death. Moreover, pharmacological treatment with drugs that inhibit GRK2 (CP-25 or paroxetine) significantly ameliorated cisplatin-induced ALI by improving liver pathological manifestations, inhibiting oxidative stress and ER stress, and reducing liver cell apoptosis. Similar results were observed in vitro. Conclusions GRK2 mediates the development of cisplatin-induced ALI by modulating NOX4 and ER stress. Pharmacological inhibition of GRK2 with CP-25 or paroxetine effectively alleviated ALI. GRK2 can be used as a potential target for the prevention and treatment of liver injury. Graphical Abstract