收稿日期: 2024-09-20
网络出版日期: 2025-02-19
基金资助
国家自然科学基金项目(82160068)
Effects of miR⁃483⁃3p on hypoxia/reoxygenation⁃induced apoptosis and pyroptosis in cardiomyocytes
Received date: 2024-09-20
Online published: 2025-02-19
目的 探讨 miR-483-3p 对乏氧/复氧(hypoxia/reoxygenation, H/R)诱导的H9c2心肌细胞凋亡和焦亡的影响及其可能机制。 方法 体外培养大鼠H9c2心肌细胞,腺相关病毒感染H9c2及三气培养箱构建H/R模型,将细胞随机分为空白对照(Sham)组、模型(H/R)组、AAV-miR-483-3p mimic+H/R(AAV-miR-483-3p)组、AAV-miR-483-3p 阴性对照+H/R(AAV-NC)组。使用倒置显微镜观察各组细胞生长状态;细胞计数试剂盒-8(CCK-8)法检测细胞增殖活性;乳酸脱氢酶(LDH)试剂盒检测各组细胞 LDH 释放量;流式细胞术检测各组细胞凋亡率;缺口末端标记法(TUNEL)法检测各组细胞凋亡情况;蛋白免疫印迹法(Western blot)检测各组细胞IL-1β、GSDMD蛋白的表达水平。 结果 与Sham组相比,H/R组细胞状态异常且细胞死亡数量增多、细胞活性下降、LDH释放量增多、细胞凋亡率及凋亡水平升高、IL-1β、GSDMD蛋白的表达水平升高(P < 0.05);与H/R组相比较,AAV-miR-483-3p组细胞状态得到改善且细胞死亡数量较少、细胞增殖活性上升、LDH释放量下降、细胞凋亡率及凋亡水平降低、IL-1β及GSDMD蛋白的表达水平降低(P < 0.05)。 结论 过表达miR-483-3p可通过提升细胞活性、细胞代谢、抑制细胞凋亡及细胞焦亡的机制改善 H/R 诱导的 H9c2 心肌细胞损伤。
关键词: miR-483-3p; 心肌缺血再灌注损伤; 细胞凋亡; 细胞焦亡
卢钰芬 , 郑孝明 , 韦少娟 , 陈礼琴 , 徐彤彤 , 吕祥威 . miR-483-3p 对乏氧/复氧诱导的心肌细胞凋亡和焦亡的作用研究[J]. 实用医学杂志, 2025 , 41(3) : 339 -346 . DOI: 10.3969/j.issn.1006-5725.2025.03.005
Objective To investigate the effects of miR-483-3p on hypoxia/reoxygenation (H/R)-induced apoptosis and pyroptosis of H9c2 cardiomyocytes and its possible mechanism. Methods Rat H9c2 cardiomyocytes were cultured in vitro,adeno-associated virus-infected H9c2 and the H/R model were constructed by triple-air incubator, and the cells were randomly divided into blank control (Sham) group, model (H/R) group, AAV-miR-483-3p mimic+H/R (AAV-miR-483-3p) group, AAV-miR-483-3p negative control+H/R (AAV-NC) group. The growth status of cells in each group was observed using an inverted microscope; cell proliferation activity was detected by cell counting kit-8 (CCK-8); LDH release by lactate dehydrogenase (LDH) kit; apoptosis rate by flow cytometry; apoptosis by notched end labeling (TUNEL).Western blot (WB) was used to detect the expression levels of IL-1β and GSDMD proteins in each group. Results Compared with the Sham group, the H/R group showed abnormal cell status and increased cell death, decreased cell activity, increased LDH release, increased apoptosis rate and apoptosis level, and increased expression levels of IL-1β and GSDMD proteins (P < 0.05); compared with the H/R group, the AAV-miR-483-3p group showed improved cell status and less cell death, increased cell proliferation activity, increased LDH release, and increased IL-1β and GSDMD protein expression levels (P < 0.05). Compared with the H/R group, the AAV-miR-483-3p group showed improved cell status and less cell death, increased cell proliferation activity, decreased LDH release, decreased apoptosis rate and apoptosis level, and decreased expression of IL-1β and GSDMD proteins (P < 0.05). Conclusion Over-expression of miR-483-3p can improve H/R-inducedH9c2 cardiomyocyte injury by enhancing cell activity and cell metabolism, and inhibiting apoptosis and cell charring.
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