吉林大学学报(医学版) ›› 2024, Vol. 50 ›› Issue (6): 1644-1653.doi: 10.13481/j.1671-587X.20240618

• 基础研究 • 上一篇    

敲低RIP3对缺氧/复氧诱导人肾小管上皮HK2细胞自噬、细胞焦亡和铁死亡的影响

何国斌,王焕()   

  1. 河南省新乡市中心医院肾内科,河南 新乡 453000
  • 收稿日期:2023-12-06 出版日期:2024-11-28 发布日期:2024-12-10
  • 通讯作者: 王焕 E-mail:57033676@qq.com
  • 作者简介:何国斌(1980-),男,河南省新乡市人,主治医师,医学硕士,主要从事肾脏病诊疗方面的研究。
  • 基金资助:
    河南省卫健委医学科技攻关计划联合共建项目(LHGJ20220988)

Effect of knockdown of RIP3 on autophagy, pyroptosis, and ferroptosis of hypoxia/reoxygenation-induced human renal tubular epithelial HK2 cells

Guobin HE,Huan WANG()   

  1. Department of Nephrology,Central Hospital,Xinxiang City,Henan Province,Xinxiang 453000,China
  • Received:2023-12-06 Online:2024-11-28 Published:2024-12-10
  • Contact: Huan WANG E-mail:57033676@qq.com

摘要:

目的 探讨敲低受体相互作用蛋白激酶3(RIP3)对缺氧复氧(H/R)诱导下人肾小管上皮HK2细胞自噬、焦亡和铁死亡的影响。 方法 将慢病毒干扰载体质粒shRIP3和阴性对照慢病毒干扰载体质粒shNC分别转染至HK2细胞中,分为shRIP3组和shNC组,另以正常培养未转染的HK2细胞作为空白组,转染48 h后,采用实时荧光定量PCR(RT-qPCR)法和Western blotting法验证慢病毒转染效果。将HK2细胞分为对照组、H/R组、shNC+H/R组和shRIP3+H/R组。CCK-8法检测各组HK2细胞存活率,免疫荧光染色法检测各组细胞中微管结合蛋白1轻链(LC)3B和含核苷酸结合结构域富亮氨酸重复序列(NLR)家族Pyrin域蛋白3(NLRP3)蛋白荧光强度,Western blotting法检测各组HK2细胞中LC3Ⅱ、LC3Ⅰ、Beclin1、含半胱氨酸的天冬氨酸蛋白酶(Caspase)-1、膜穿孔蛋白D(GSDMD)、白细胞介素(IL)-1β和IL-18蛋白表达水平,试剂盒检测各组细胞中铁离子(Fe2+)水平。 结果 与空白组和shNC组比较,shRIP3组HK2细胞中RIP3 mRNA和蛋白表达水平均明显降低(P<0.05)。CCK-8法检测,与对照组比较,H/R组HK2细胞存活率明显降低(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞存活率明显升高(P<0.05)。免疫荧光染色法检测,与对照组比较,H/R组HK2细胞中LC3B蛋白荧光强度明显降低(P<0.05),NLRP3蛋白荧光强度明显升高(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞中LC3B蛋白荧光强度明显升高(P<0.05),NLRP3蛋白荧光强度明显降低(P<0.05)。Western blotting法检测,与对照组比较,H/R组HK2细胞中LC3Ⅱ/LC3Ⅰ比值明显降低(P<0.05),Beclin1蛋白表达水平明显降低(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞中LC3Ⅱ/LC3Ⅰ比值明显升高(P<0.05),Beclin1蛋白表达水平明显升高(P<0.05);与对照组比较,H/R组HK2细胞中Caspase-1、GSDMD、IL-1β和IL-18蛋白表达水平均明显升高(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞中Caspase-1、GSDMD、IL-1β和IL-18蛋白表达水平均明显降低(P<0.05)。与对照组比较,H/R组HK2细胞中GPX4和SLC7A11蛋白表达水平均明显降低(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞中GPX4和SLC7A11蛋白表达水平均明显升高(P<0.05)。与对照组比较,H/R组HK2中细胞Fe2+水平明显升高(P<0.05);与H/R组比较,shRIP3+H/R组HK2细胞中Fe2+水平明显降低(P<0.05)。 结论 靶向敲低RIP3可诱导H/R诱导人肾小管上皮HK2细胞自噬,抑制细胞焦亡和减轻铁死亡。

关键词: 人肾小管上皮HK2细胞, 缺氧/复氧, 受体相互作用蛋白激酶3, 自噬, 焦亡, 铁死亡

Abstract:

Objective To discuss the effect of knockdown of receptor-interacting protein kinase 3 (RIP3) on autophagy, pyroptosis, and ferroptosis in the human renal tubular epithelial HK2 cells under hypoxia/reoxygenation (H/R) conditions. Methods The lentiviral interference vector plasmid shRIP3 and negative control lentiviral interference vector plasmid shNC were transfected into the HK2 cells and the HK cells were divided into shRIP3 group and shNC group, and the normal cultured untransfected HK2 cells were regarded as blank group. After 48 h of transfection, real-time fluorescence quantitative PCR (RT-qPCR) and Western blotting methods were used to verify the lentiviral transfection efficiencies. The HK2 cells were divided into control group, H/R group, shNC+H/R group, and shRIP3+H/R group. CCK-8 method was used to detect the survival rates of the HK2 cells in various groups; immunofluorescence staining was used to detect the fluorescence intensities of light chain 3 (LC3B) and NLR family pyrin domain-containing 3 (NLRP3) proteins in the cells in various groups; Western blotting method was used to detect the expression levels of LC3Ⅱ, LC3Ⅰ, Beclin1, Caspase-1, Gasdermin D (GSDMD), interleukin (IL)-1β, and IL-18 proteins in the HK2 cells in various groups; Kits were used to detect the ferri ion(Fe2+) levels in the cells in various groups. Results Compared with blank group and shNC group, the expression levels of RIP3 mRNA and protein in the HK2 cells in shRIP3 group were decreased (P<0.05).The CCK-8 method results showed that compared with control group, the survival rate of the HK2 cells in H/R group was decreased (P<0.05); compared with H/R group, the survival rate of the HK2 cells in shRIP3+H/R group was increased (P<0.05). The immunofluorescence staining results showed that compared with control group, the fluorescence intensity of LC3B protein in the HK2 cells in H/R group was decreased (P<0.05), and the fluorescence intensity of NLRP3 protein was increased (P<0.05); compared with H/R group, the fluorescence intensity of LC3B protein in the HK2 cells in shRIP3+H/R group was increased (P<0.05), and the fluorescence intensity of NLRP3 protein was decreased (P<0.05). The Western blotting results showed that compared with control group, the ratio of LC3Ⅱ/LC3Ⅰ and the expression level of Beclin1 protein in the HK2 cells in H/R group were decreased (P<0.05); compared with H/R group, the ratio of LC3Ⅱ/LC3Ⅰ and expression level of Beclin1 protein in the HK2 cells in shRIP3+H/R group were increased (P<0.05); compared with control group, the expression levels of Caspase-1, GSDMD, IL-1β, and IL-18 proteins in the HK2 cells in H/R group were increased (P<0.05); compared with H/R group, the expression levels of Caspase-1, GSDMD, IL-1β, and IL-18 proteins in the HK2 cells in shRIP3+H/R group were decreased (P<0.05). Compared with control group, the expression levels of GPX4 and SLC7A11 proteins in the HK2 cells in H/R group were decreased (P<0.05); compared with H/R group, the expression levels of GPX4 and SLC7A11 proteins in the HK2 cells in shRIP3+H/R group were increased (P<0.05). Compared with control group, the Fe2+ level in the HK2 cells in H/R group was increased (P<0.05); compared with H/R group, the Fe2+ level in the HK2 cells in shRIP3+H/R group was decreased (P<0.05). Conclusion Targeted knockdown of RIP3 can induce the autophagy, inhibit the pyroptosis, and reduce the ferroptosis of the human renal tubular epithelial HK2 cells induced by H/R.

Key words: Human renal tubular epithelial HK2 cells, Hypoxia/reoxygenation, Receptor-interacting protein kinase 3, Autophagy, Pyroptosis, Ferroptosis

中图分类号: 

  • R692