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miR-361-3P调控转化生长因子β1诱导成骨细胞凋亡的研究

本站小编 Free考研考试/2024-01-21

摘要: 目的 研究人成骨细胞内miR-361-3P对转化生长因子 β1(TGF-β1)和细胞凋亡标志分子caspase 3蛋白活性表达的影响,探讨miR-361-3P/TGF-β1通路在人成骨细胞凋亡中的作用机制。方法 用miR-361-3p mimic或inhibitor及TGF-β1 siRNA(siTGF-β1)转染人成骨细胞系hFob1.19; RT-qPCR和Western blotting 检测caspase 3的变化; CCK-8法检测细胞的增殖和凋亡; 荧光素酶基因报告实验检测miR-361-3p和TGF-β1基因的结合情况。结果 在hFob1.19细胞内,miR-361-3p mimic显著下调了TGF-β1mRNA表达,同时明显抑制了细胞内的TGF-β1 蛋白活性(P<0.05); miR-361-3p mimic 作用hFob1.19细胞48 h后,miR-361-3p可明显抑制细胞增殖(P<0.05),导致成骨细胞内caspase 3蛋白活性明显升高(P<0.05),并减少WT-TGF-β1的荧光素酶活性; miR-361-3p inhibitor可增强hFob1.19细胞增殖,抑制细胞内caspase 3蛋白活性,而si-TGF-β1则可明显增强caspase 3活性表达。结论 miR-361-3p可能通过抑制TGF-β1负向调控人成骨细胞的增殖并促进其凋亡。

miR-361-3P调控转化生长因子β1诱导成骨细胞凋亡的研究

王帆, 王鹏皓
中国医科大学附属第一医院骨科, 沈阳 110001
收稿日期:2022-11-16出版日期:2023-07-30发布日期:2023-07-08
通讯作者:王鹏皓E-mail:phwang@cmu.edu.cn
作者简介:王帆(1987-),女,护师,本科.
基金资助:国家自然科学基金(81971322)


关键词: 成骨细胞, miR-361-3P, 转化生长因子β1, caspase 3, 细胞凋亡
Abstract: Objective To investigate the effect of microRNA(miR)-361-3p on transforming growth factor-β1(TGF-β1)expression and apoptosis marker molecule caspase 3 protein activity,and the apoptotic mechanism of the miR-361-3p/TGF-1 pathway in human osteoblasts. Methods The miR-361-3p mimic or miR-361-3p and small interferingRNA(si-TGF-β1)were transfected into human osteoblasts (hFob1.19). The expression and binding of miR-361-3p and TGF-β1 were assessed by real-time quantitative PCR(RT-qPCR),CCK-8 kit, and luciferase gene reporter assay. Results Within hFob1.19 cells,the miR-361-3p mimic significantly downregulated TGF-1 mRNA expression and significantly inhibited TGF-β1 protein activity(P<0.05). Cell proliferation was significantly decreased in hFob1.19 cells after 48 h by the miR-361-3p mimic(P<0.05),and the activity of caspase 3 significantly increased(P<0.05). The miR-361-3p mimic also reduced the luciferase activity of WT-TGF-β1. The miR-361-3p inhibitor enhanced the proliferation of hFob1.19 cells and inhibited the protein activity of caspase 3 in the cells,while si-TGF-β1 enhanced the active expression of caspase 3. Conclusion miR-361-3p may negatively regulate the proliferation of hFob1.19 cells and promote apoptosis by inhibiting TGF-β1.
Key words: osteoblasts, miR-361-3p, transforming growth factor-β1, caspase 3, cell apoptosis
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https://journal.cmu.edu.cn/CN/article/downloadArticleFile.do?attachType=PDF&id=3239
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