J Rheumatol:miR-98在系统性红斑狼疮中的作用及其潜在机制

2018-06-21 xiangting MedSci原创

在SLE CD4+T细胞中miR-98下调通过调节Fas介导的凋亡信号通路而诱导细胞凋亡。

T淋巴细胞凋亡在系统性红斑狼疮(SLE)发病机制中起重要作用。然而,SLE中细胞凋亡的潜在调控机制尚不清楚。这项研究旨在探讨miR-98在SLE中的作用及其潜在机制。

研究人员采用蛋白质印迹法和定量逆转录PCR(qRT-PCR)分析miR-98和Fas的表达。进行荧光素酶报告分析以识别miR-98靶标。为了改变miRNA水平,将miR-98模拟物和抑制剂转染到细胞中。使用慢病毒构建以使SLE CD4+T细胞中过度表达Fas水平。用qRT-PCR和蛋白质印迹法检测基因和蛋白表达。Annexin V染色和流式细胞术检测细胞凋亡水平。

与健康对照相比,SLE CD4+T细胞中miR-98下调,而Fas mRNA和蛋白表达上调。miR-98通过模拟转染上调在mRNA和蛋白水平保护了Jurkat细胞免于Fas介导的凋亡,而miR-98抑制剂则诱导完全相反的效应。荧光素酶报告分析表明miR-98直接靶向Fas mRNA。此外,miR-98抑制剂通过Fas-caspase轴诱导初始健康CD4+T细胞的凋亡,而SLE CD4+T细胞中miR-98上调则导致相反的效应。

这项研究表明,在SLE CD4+T细胞中miR-98下调通过调节Fas介导的凋亡信号通路而诱导细胞凋亡。这些结果提示miR-98可作为SLE治疗的潜在靶点。

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    2018-11-20 smallant2002
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    2018-06-23 zhouqu_8

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