[Blocking pannexin-1 alleviates cisplatin-induced acute kidney injury in mice by reducing renal inflammatory cell infiltration].

A new interesting article has been published in Nan Fang Yi Ke Da Xue Xue Bao. 2019 May 30;39(5):508-514. doi: 10.12122/j.issn.1673-4254.2019.05.02. English and titled:

[Blocking pannexin-1 alleviates cisplatin-induced acute kidney injury in mice by reducing renal inflammatory cell infiltration].

Authors of this article are:

Liu C, Huang L, Li C, Shen Y, Wang J.

A summary of the article is shown below:

OBJECTIVE: To investigate the effect of blocking pannexin-1 against acute kidney injury induced by cisplatin.METHODS: Twenty-six male C57BL/6 mice aged 6-8 weeks were randomly divided into control group, cisplatin model (Cis) group and cisplatin + carbenoxolone treatment group (Cis + CBX). In Cis group and Cis + CBX group, the mice were injected intraperitoneally with 20 mg/kg of cisplatin and with CBX (20 mg/kg) at 30 min before and 24 and 48 h after cisplatin inhjection, respectively. All the mice were sacrificed at 72 h after cisplatin injection, and plasma and kidney samples were collected for testing mRNA and protein expression levels of pannexin-1 in the renal tissue using RT-qPCR and Western blotting and for detecting plasma creatinine and BUN levels; the pathological changes in the renal tissues were observed using Periodic Acid-Schiff staining. The expression of kidney injury molecule 1 (KIM-1) was examined using immunohistochemistry and the mRNA expressions of KIM-1 and neutrophil gelatinase- related lipid transport protein (NGAL) were detected by RT-qPCR to evaluate the injuries of the renal tubules. The infiltration of F4/80-positive macrophages and CD4-positive T cells were observed by immunofluorescence. In the in vitro experiment, human proximal tubule epithelial cell line HK-2 was stimulated with 50 μmol/L cisplatin to establish a cell model of acute kidney injury, and the mRNA and protein expressions of pannexin-1 were detected by RT-qPCR and Western blotting at 4, 6, 12, 18 and 24 h after the stimulation.RESULTS: Compared with the control mice, the cisplatin-treated mice showed significantly up-regulated protein levels (P < 0.05) and mRNA levels (P < 0.005) of pannexin-1 in the kidney tissue. Cisplatin stimulation also caused significant increases in the protein levels (P < 0.005) and mRNA levels (P < 0.005) of pannexin-1 in cultured HK-2 cells. Compared with cisplatin-treated mice, the mice treated with both cisplatin and the pannexin-1 inhibitor CBX showed obviously lessened kidney pathologies and milder renal tubular injuries with significantly reduced plasma BUN and Scr levels (P < 0.01), expressions of KIM-1 and NGAL in the kidney (P < 0.05), and infiltration of F4/80-positive macrophages (P < 0.01) and CD4- positive T cells (P < 0.05) in the kidney tissues.CONCLUSIONS: In cisplatin induced acute kidney injury mice model, Pannexin-1 expression is up-regulated in the kidneys tissue, and blocking pannexin-1 alleviates the acute kidney injury via reducing renal inflammatory cell infiltration.

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This article is a good source of information and a good way to become familiar with topics such as: acute kidney injury; cisplatin; pannexin-1; renal tubular epithelial cells.

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