miR-486-5p 可保护大鼠缺血性肾损伤,防止向慢性肾病和血管功能障碍过渡。

IF 6.7 2区 医学 Q1 MEDICINE, RESEARCH & EXPERIMENTAL
Adrianna Douvris, Jose L Viñas, Alexey Gutsol, Joseph Zimpelmann, Dylan Burger, Kevin D Burns
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引用次数: 0

摘要

目的:急性肾损伤(AKI)会增加进展性慢性肾病(CKD)的风险。微小核糖核酸(miR)-486-5p 能保护小鼠肾脏免受缺血再灌注损伤,但它对血管和 CKD 发展的长期影响尚不清楚。我们研究了 miR-486-5p 是否会阻止大鼠从 AKI 向 CKD 过渡,并影响血管功能。研究方法成年雄性大鼠接受双侧肾脏红外照射,然后静脉注射脂质体包装的 miR-486-5p(0.5 mg/kg)。24小时和10周后评估肾功能和组织学损伤。用免疫印迹和免疫荧光法测定肾脏内皮细胞蛋白水平,用线肌造影法测定肠系膜动脉反应性。结果显示在患有 IR 的大鼠身上,miR-486-5p 阻止了肾脏内皮细胞细胞间粘附分子-1(ICAM-1)的增加,减少了中性粒细胞的浸润和组织学损伤,并使血浆肌酐正常化(p
本文章由计算机程序翻译,如有差异,请以英文原文为准。
miR-486-5p protects against rat ischemic kidney injury and prevents the transition to chronic kidney disease and vascular dysfunction.

Aim: Acute kidney injury (AKI) increases the risk for progressive chronic kidney disease (CKD). MicroRNA (miR)-486-5p protects against kidney ischemia-reperfusion (IR) injury in mice, although its long-term effects on the vasculature and development of CKD are unknown. We studied whether miR-486-5p would prevent the AKI to CKD transition in rat, and affect vascular function.

Methods: Adult male rats were subjected to bilateral kidney IR followed by i.v. injection of liposomal-packaged miR-486-5p (0.5 mg/kg). Kidney function and histologic injury were assessed after 24 h and 10 weeks. Kidney endothelial protein levels were measured by immunoblot and immunofluorescence, and mesenteric artery reactivity was determined by wire myography.

Results: In rats with IR, miR-486-5p blocked kidney endothelial cell increases in intercellular adhesion molecule-1 (ICAM-1), reduced neutrophil infiltration and histologic injury, and normalized plasma creatinine (P<0.001). However, miR-486-5p attenuated IR-induced kidney endothelial nitric oxide synthase (eNOS) expression (P<0.05). At 10 weeks, kidneys from rats with IR alone had decreased peritubular capillary density and increased interstitial collagen deposition (P<0.0001), and mesenteric arteries showed impaired endothelium-dependent vasorelaxation (P<0.001). These changes were inhibited by miR-486-5p. Delayed miR-486-5p administration (96 h, 3 weeks after IR) had no impact on kidney fibrosis, capillary density, or endothelial function.

Conclusion: In rats, administration of miR-486-5p early after kidney IR prevents injury, and protects against CKD development and systemic endothelial dysfunction. These protective effects are associated with inhibition of endothelial ICAM-1 and occur despite reduction in eNOS. miR-486-5p holds promise for the prevention of ischemic AKI and its complications.

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来源期刊
Clinical science
Clinical science 医学-医学:研究与实验
CiteScore
11.40
自引率
0.00%
发文量
189
审稿时长
4-8 weeks
期刊介绍: Translating molecular bioscience and experimental research into medical insights, Clinical Science offers multi-disciplinary coverage and clinical perspectives to advance human health. Its international Editorial Board is charged with selecting peer-reviewed original papers of the highest scientific merit covering the broad spectrum of biomedical specialities including, although not exclusively: Cardiovascular system Cerebrovascular system Gastrointestinal tract and liver Genomic medicine Infection and immunity Inflammation Oncology Metabolism Endocrinology and nutrition Nephrology Circulation Respiratory system Vascular biology Molecular pathology.
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