实用医学杂志 ›› 2024, Vol. 40 ›› Issue (15): 2056-2062.doi: 10.3969/j.issn.1006-5725.2024.15.003

• 基础研究 • 上一篇    下一篇

miR-143-3p靶向调控TLR2/ NF-κB/NLRP3通路对溃疡性结肠炎细胞焦亡的影响

史秀丽1,陈嘉琪1,朱璠1,曾娟1,2,吴娜1,2()   

  1. 1.江西中医药大学 (南昌 330004 )
    2.江西中医药大学附属医院 (南昌 330006 )
  • 收稿日期:2023-11-25 出版日期:2024-08-10 发布日期:2024-07-30
  • 通讯作者: 吴娜 E-mail:wuna0791@163.com
  • 基金资助:
    国家自然科学基金项目(82160903);江西省自然科学基金青年基金项目(20212BAB216060);江西省中医药中青年骨干人才(第四批)培养计划(赣中医药科教字[2022]7号)

The effect of miR⁃143⁃3p on pyroptosis of ulcerative colitis cells by regulating TLR2/NF⁃κB/NLRP3

Xiuli SHI1,Jiaqi CHEN1,Fan ZHU1,Juan ZENG1,2,Na. WU1,2()   

  1. Jiangxi University of Traditional Chinese Medicine,Nanchang 330004,China
  • Received:2023-11-25 Online:2024-08-10 Published:2024-07-30
  • Contact: Na. WU E-mail:wuna0791@163.com

摘要:

目的 研究miR-143-3p对LPS+ATP诱导HCT-116细胞焦亡的影响。 方法 双荧光素酶检测miR-143-3p与TLR2基因靶向关系。转染miR-143-3p mimic后建立焦亡模型,流式细胞术检测细胞凋亡,生化法检测Caspase-1活性及LDH含量;ELISA法检测IL-1β、IL-18含量。q-PCR检测NF-κB、TLR2、NLRP3、GSDMD mRNA水平;免疫荧光检测NLRP3、ASC蛋白表达;Western blot检测TLR2、GSDMD、p-NF-κB p65、cleave Caspase-1蛋白表达。 结果 双荧光素酶检测发现miR-143-3p靶向调控TLR2表达。miR-143-3p mimic组和si TLR2组较模型组细胞中NF-κB、TLR2、NLRP3、GSDMD mRNA表达及TLR2、GSDMD、p-NF-κB p65、cleave Caspase-1、ASC、NLRP3蛋白表达降低;Caspase-1活性及LDH、IL-1β、IL-18含量降低。 结论 miR-143-3p靶向TLR2基因调控NF-κB/NLRP3/Caspase-1信号通路调控溃疡性结肠炎细胞焦亡。

关键词: 溃疡性结肠炎, 细胞焦亡, miR-143-3p, TLR2, TLR2/ NF-κB/NLRP3

Abstract:

Objective To study the effect of miR-143-3p on pyroptosis of HCT-116 cells induced by LPS + ATP. Methods The targeting relationship between miR-143-3 p and TLR2 gene was detected by dual luciferase. The pyroptosis model was established after transfection of miR-143-3p mimic. Cell apoptosis was detected by flow cytometry, and the activity of Caspase-1 and LDH was detected by biochemical method. The levels of IL-1β and IL-18 were detected by ELISA. The mRNA levels of NF-κB, TLR2, NLRP3 and GSDMD were detected by q-PCR. The expression of NLRP3 and ASC was detected by immunofluorescence. The protein expressions of TLR2, GSDMD, p-NF-κB p65 and cleave Caspase-1 were detected by Western blot. Results Dual luciferase assay showed that miR-143-3p targeted TLR2 expression. The expressions of NF-κB, TLR2, NLRP3, GSDMD mRNA and TLR2, GSDMD, p-NF-κB p65, cleave Caspase-1, ASC, NLRP3 protein in miR-143-3p mimic group and si TLR2 group were lower than those in model group. The activity of Caspase-1 and the content of LDH, IL-1β and IL-18 decreased. Conclusion miR-143-3p regulates pyroptosis of ulcerative colitis cells by targeting TLR2 gene and regulating NF-κB/NLRP3/Caspase-1 signaling pathway.

Key words: ulcerative colitis, cell pyroptosis, miR-143-3p, TLR2, TLR2/ NF-κB/NLRP3

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