实用医学杂志 ›› 2025, Vol. 41 ›› Issue (3): 339-346.doi: 10.3969/j.issn.1006-5725.2025.03.005

• 基础研究 • 上一篇    

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

卢钰芬1,郑孝明1,韦少娟1,陈礼琴1,徐彤彤1,吕祥威2()   

  1. 1.桂林医学院附属医院综合科 (广西 桂林 541001 )
    2.桂林医学院广西肿瘤免疫与微环境调控重点实验室 ;(广西 桂林 541199 )
  • 收稿日期:2024-09-20 出版日期:2025-02-10 发布日期:2025-02-19
  • 通讯作者: 吕祥威 E-mail:lvxiangwei910@163.com
  • 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

Yufen LU1,Xiaoming ZHENG1,Shaojuan WEI1,Liqin CHEN1,Tongtong XU1,Xiangwei. LÜ2()   

  1. *.Department of General Medicine,Affiliated Hospital of Guilin Medical College,Guilin 541001,Guangxi,China
  • Received:2024-09-20 Online:2025-02-10 Published:2025-02-19
  • Contact: Xiangwei. Lü E-mail:lvxiangwei910@163.com

摘要:

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

Abstract:

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.

Key words: miR-483-3p, myocardial ischemia-reperfusion injury, apoptosis, cellular pyroptosis

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