Protective effect of dabrafenib on renal ischemia-reperfusion injury in vivo and in vitro

• Published in: Biochemical and biophysical research communications Vol. 522; no. 2; pp. 395 - 401
• Main Authors: Liu, Shu-su, Chen, Yan-yi, Wang, Shao-xia, Yu, Qing
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 05.02.2020
• Subjects: AKI; Dabrafenib (DAB); Inflammation; Necroptosis; Renal ischemia reperfusion injury (renal IRI); Inflammation; Renal ischemia reperfusion injury (renal IRI); Necroptosis; Dabrafenib (DAB); AKI
• ISSN: 0006-291X; 1090-2104
• DOI: 10.1016/j.bbrc.2019.11.105

Ischemia-reperfusion injury (IRI) is a major cause of acute kidney injury (AKI), which can lead to poor outcome and increased risk of mortality. Dabrafenib (DAB) is an approved cancer treatment. Little is known about the effect of DAB in prevention or treatment of renal IRI. For in vivo experiments, C57BL/6 mice were divided into four groups: sham (no IRI, no DAB), IRI, DAB, and DAB + IRI. IRI was induced by clamping of bilateral renal pedicles for 30 min. For in vitro experiments, HK-2 cells were used to establish the hypoxia/reoxygenation (H/R) injury model, with four groups: control (no H/R, no DAB), H/R, DAB, and DAB + H/R. Renal function and renal histological changes were recorded. Expression of NGAL and KIM-1 proteins and mRNAs were determined by western blotting and qRT-PCR; secretion of inflammatory cytokines (IL-6 and TNF- α) was determined by qRT-PCR; Cell death was determined using the TUNEL assay, measurement of cleaved caspase-3, and flow cytometry. Necroptosis-related proteins were determined by western blotting. In mice, DAB pretreatment improved renal function and also reduced histological injury, inflammation, cell death, and expression of necroptosis-associated proteins. In HK-2 cells, DAB significantly decreased the levels of NGAL and KIM-1, inflammatory cytokines, cell death, and necroptosis-related proteins. Our in vitro and in vivo experiments indicated that DAB appears to alleviate renal IRI by suppressing cell death and inhibiting inflammatory responses. DAB has potential use for the clinical prevention and treatment of AKI-induced IRI. •We clarified dabrafenib could attenuate renal IRI in vivo and in vitro, which may by inhibiting RIP3 mediated necroptosis.•First, we found that dabrafenib could alleviate mouse renal IRI and supress the expression of necroptotic related proteins.•Then, we established the model of renal ischemia reperfusion injury by using HK-2 cells in vitro.•Our data showed that dabrafenib could decrease cell death and downregulate the level of necroptotic related proteins.•Our study suggests that DAB should be examined as a potential therapeutic option for the prevention or treatment of AKI.