DNA demethylase Tet2 suppresses cisplatin-induced acute kidney injury.

DNA demethylase Tet2 suppresses cisplatin-induced acute kidney injury.
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DOI:
10.1038/s41420-021-00528-7
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发表时间:
2021-06-17
影响因子:
7
通讯作者:
Lin W
Lin W
中科院分区:
医学2区
文献类型:
--
作者:
Bao Y;Bai M;Zhu H;Yuan Y;Wang Y;Zhang Y;Wang J;Xie X;Yao X;Mao J;Fu X;Chen J;Yang Y;Lin W

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脱甲基酶Tet 2在免疫反应中起着至关重要的作用。急性肾损伤(阿基)的起始和维持阶段以内皮和肾小管细胞损伤过程中的炎症反应和白细胞募集为标志。然而,Tet 2在阿基中的作用尚不明确。我们的研究确定了顺铂诱导的阿基小鼠模型中与Tet 2基因表达水平相关的肾组织损伤程度。与野生型小鼠相比,接受顺铂治疗的Tet 2敲除(KO)小鼠经历了严重的肾小管坏死和扩张、炎症以及阿基标记物的表达水平。此外,Tet 2质粒的施用保护Tet 2-KO小鼠免受顺铂诱导的肾毒性,但不保护Tet 2催化死亡突变体。Tet 2 KO与顺铂诱导的小鼠模型中的代谢途径如视黄醇、花生四烯酸、亚麻酸代谢和PPAR信号通路的变化相关。Tet 2表达在其他阿基小鼠模型和临床样品中也下调。因此,我们的研究结果表明,Tet 2在阿基过程中通过PPAR信号通路调节代谢和炎症反应,具有肾脏保护作用。
Demethylase Tet2 plays a vital role in the immune response. Acute kidney injury (AKI) initiation and maintenance phases are marked by inflammatory responses and leukocyte recruitment in endothelial and tubular cell injury processes. However, the role of Tet2 in AKI is poorly defined. Our study determined the degree of renal tissue damage associated with Tet2 gene expression levels in a cisplatin-induced AKI mice model. Tet2-knockout (KO) mice with cisplatin treatment experienced severe tubular necrosis and dilatation, inflammation, and AKI markers’ expression levels than the wild-type mice. In addition, the administration of Tet2 plasmid protected Tet2-KO mice from cisplatin-induced nephrotoxicity, but not Tet2-catalytic-dead mutant. Tet2 KO was associated with a change in metabolic pathways like retinol, arachidonic acid, linolenic acid metabolism, and PPAR signaling pathway in the cisplatin-induced mice model. Tet2 expression is also downregulated in other AKI mice models and clinical samples. Thus, our results indicate that Tet2 has a renal protective effect during AKI by regulating metabolic and inflammatory responses through the PPAR signaling pathway.
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