DsbA-L mediated renal tubulointerstitial fibrosis in UUO mice.

DsbA-L mediated renal tubulointerstitial fibrosis in UUO mice.
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DsbA-L 介导 UUO 小鼠肾小管间质纤维化

DOI:
10.1038/s41467-020-18304-z
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发表时间:
2020-09-18
影响因子:
16.6
通讯作者:
Zhang D
Zhang D
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li X;Pan J;Li H;Li G;Liu X;Liu B;He Z;Peng Z;Zhang H;Li Y;Xiang X;Chai X;Yuan Y;Zheng P;Liu F;Zhang D

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近年来研究发现,上调二硫键A氧化还原酶样蛋白(DsbA-L)可预防糖尿病肾病(DN)脂质性肾损伤,但DsbA-L在近端肾小管间质纤维化(TIF)中的作用及调控机制尚不清楚。在本研究中,我们发现近端小管特异性DsbA-L基因敲除小鼠(PT-DsbA-L-KO)可减轻UUO诱导的TIF、肾细胞凋亡和炎症。其机制是DsbA-L与BUMPT细胞线粒体内的Hsp 90相互作用,激活Smad 3和p53信号通路,产生结缔组织生长因子(CTGF),导致BUMPT细胞和小鼠肾成纤维细胞ECM的积累。此外,PT-DsbA-L-KO小鼠通过激活Hsp 90/Smad 3和p53/CTGF轴,减轻了UUO、缺血/再灌注(I/R)、马兜铃酸和反复急性低剂量顺铂引起的TIF进展。最后,在梗阻性肾病(Ob)患者的肾活检中证实了上述分子变化。总之,这些结果表明,近端肾小管细胞中的DsbA-L通过激活Hsp 90/Smad 3和p53/CTGF轴促进TIF。
Recent studies have reported that upregulation of disulfide-bond A oxidoreductase-like protein (DsbA-L) prevented lipid-induced renal injury in diabetic nephropathy (DN). However, the role and regulation of proximal tubular DsbA-L for renal tubulointerstitial fibrosis (TIF) remains unclear. In current study, we found that a proximal tubules-specific DsbA-L knockout mouse (PT-DsbA-L-KO) attenuated UUO-induced TIF, renal cell apoptosis and inflammation. Mechanistically, the DsbA-L interacted with Hsp90 in mitochondria of BUMPT cells which activated the signaling of Smad3 and p53 to produce connective tissue growth factor (CTGF) and then resulted in accumulation of ECM of BUMPT cells and mouse kidney fibroblasts. In addition, the progression of TIF caused by UUO, ischemic/reperfusion (I/R), aristolochic acid, and repeated acute low-dose cisplatin was also alleviated in PT-DsbA-L-KO mice via the activation of Hsp90 /Smad3 and p53/CTGF axis. Finally, the above molecular changes were verified in the kidney biopsies from patients with obstructive nephropathy (Ob). Together, these results suggest that DsbA-L in proximal tubular cells promotes TIF via activation of the Hsp90 /Smad3 and p53/CTGF axis.
DOI: 10.1074/jbc.ra118.003562
发表时间: 2018-08-31
期刊: The Journal of biological chemistry
影响因子: --
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