Deficiency of Growth Arrest and DNA Damage-Inducible 45 α -R-Loop Pathway and Kidney Injury in Diabetic Nephropathy.

IF 9.4 1区 医学 Q1 UROLOGY & NEPHROLOGY Journal of The American Society of Nephrology Pub Date : 2025-03-18 DOI:10.1681/ASN.0000000681
Xue Qi Li, Jia Xiu Zhang, Liang Li, Qin Yi Wu, Xiong Zhong Ruan, Pei Pei Chen, Kun Ling Ma
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GADD45α-R-Loop 通路缺陷与糖尿病肾病的肾损伤
背景:糖尿病肾病是肾衰竭的主要原因。持续高血糖引起肾细胞代谢紊乱,表观遗传失调基因表达,从而导致糖尿病肾病的发病机制。通过使用机器学习算法分析GEO数据库,我们的初步结果表明,生长停滞和DNA损伤诱导的45α (GADD45α)可能是糖尿病肾病的关键调节因子。此外,新出现的证据表明,三链DNA-RNA结构r环对糖尿病肾病期间的基因表达至关重要。因此,本研究旨在探讨GADD45α通过与r环相互作用调节表观遗传改变在糖尿病肾病中的作用。方法:采用小鼠腹腔注射链脲佐菌素建立糖尿病小鼠模型。分析野生型、GADD45α敲除小鼠和肾小管特异性GADD45α过表达小鼠的肾脏组织学和生化指标。采用GADD45α慢病毒诱导HK-2细胞过表达GADD45α,并用高糖处理在体外验证其机制。结果:GADD45α在糖尿病肾病肾脏中表达降低,与肾功能不全相关。GADD45α敲除加重了肾损伤,而过表达则减轻了肾损伤。从机制上讲,GADD45α与STEAP4启动子上的r -环相互作用,招募TET1激活STEAP4转录。GADD45α-R-loop通路的缺乏加重了糖尿病肾病的线粒体损伤、脂质代谢紊乱和氧化应激增加。结论:GADD45α缺乏通过与r -环相互作用和抑制STEAP4启动子去甲基化而加剧糖尿病肾病。靶向GADD45α-R-loop通路具有治疗糖尿病肾病的潜力。
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来源期刊
Journal of The American Society of Nephrology
Journal of The American Society of Nephrology 医学-泌尿学与肾脏学
CiteScore
22.40
自引率
2.90%
发文量
492
审稿时长
3-8 weeks
期刊介绍: The Journal of the American Society of Nephrology (JASN) stands as the preeminent kidney journal globally, offering an exceptional synthesis of cutting-edge basic research, clinical epidemiology, meta-analysis, and relevant editorial content. Representing a comprehensive resource, JASN encompasses clinical research, editorials distilling key findings, perspectives, and timely reviews. Editorials are skillfully crafted to elucidate the essential insights of the parent article, while JASN actively encourages the submission of Letters to the Editor discussing recently published articles. The reviews featured in JASN are consistently erudite and comprehensive, providing thorough coverage of respective fields. Since its inception in July 1990, JASN has been a monthly publication. JASN publishes original research reports and editorial content across a spectrum of basic and clinical science relevant to the broad discipline of nephrology. Topics covered include renal cell biology, developmental biology of the kidney, genetics of kidney disease, cell and transport physiology, hemodynamics and vascular regulation, mechanisms of blood pressure regulation, renal immunology, kidney pathology, pathophysiology of kidney diseases, nephrolithiasis, clinical nephrology (including dialysis and transplantation), and hypertension. Furthermore, articles addressing healthcare policy and care delivery issues relevant to nephrology are warmly welcomed.
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