首页> 外文期刊>Journal of Huazhong University of Science and Technology >Egr-1 Mediates Si0_2-driven Transcription of Membrane Type Ⅰ Matrix Metalloproteinase in Macrophages
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Egr-1 Mediates Si0_2-driven Transcription of Membrane Type Ⅰ Matrix Metalloproteinase in Macrophages

机译:Egr-1介导Si0_2驱动的巨噬细胞中的膜I型基质金属蛋白酶的转录。

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The up-regulation mechanism of membrane type Ⅰ matrix metalloproteinase (MT1-MMP) in macrophages stimulated by silica in vitro and the contribution of early growth response 1 (Egr-1) transcription factor in the gene expression pathway were investigated. Macrophages stimulated by silica were treated with Egr-1 antibody or Egr-1 decoy oligodeoxynucleotides (ODN). The levels of MT1-MMP proteins were determined by Western blot and the expression of MT1-MMP mRNAs was detected by RT-PCR. The results showed as compared with control macrophages, silica-stimulated group showed up-regulated gene expression of MT1-MMP via Egr-1 (P < 0.01). Compared with silica-stimulated macrophages untreated with antibody, the cells treated with 5 μg/mL Egr-1 antibody were associated with reduced expression of MT1-MMP protein (P < 0.01) and mRNA (P < 0.01). Compared with silica-stimulated untransfected group, the Egr-1 "decoy" ODN group was associated with reduction in the expression of MT1-MMP protein and mRNA (P < 0.01). It was concluded gene expression of MT1-MMP which may play a critical role in silicosis was up-regulated by silica in macrophages. Egr-1 participated in the expression of MT1-MMP and positively regulated the expression. Both Egr-1 antibody and Egr-1 decoy ODN suppressed the expression of MT1-MMP through the Egr-1 pathway and may become a potential therapeutic tool in the management of silicosis in the future.
机译:研究了二氧化硅体外刺激巨噬细胞膜Ⅰ型基质金属蛋白酶(MT1-MMP)的上调机制以及早期生长反应1(Egr-1)转录因子在基因表达途径中的作用。二氧化硅刺激的巨噬细胞用Egr-1抗体或Egr-1诱饵寡聚脱氧核苷酸(ODN)处理。 Western blot检测MT1-MMP蛋白水平,RT-PCR检测MT1-MMP mRNA表达。结果表明,与对照巨噬细胞相比,硅石刺激组通过Egr-1上调了MT1-MMP的基因表达(P <0.01)。与未经抗体处理的二氧化硅刺激巨噬细胞相比,经5μg/ mL Egr-1抗体处理的细胞与MT1-MMP蛋白和mRNA的表达降低有关(P <0.01)。与二氧化硅刺激的未转染组相比,Egr-1“诱饵” ODN组与MT1-MMP蛋白和mRNA表达的降低有关(P <0.01)。得出结论,可能在矽肺中起关键作用的MT1-MMP基因表达被巨噬细胞中的二氧化硅上调。 Egr-1参与MT1-MMP的表达并积极调节其表达。 Egr-1抗体和Egr-1诱饵ODN均可通过Egr-1途径抑制MT1-MMP的表达,并且将来可能成为治疗矽肺的潜在治疗工具。

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