石棉暴露人群血浆中差异microRNA筛选及功能分析

An analysis on plasma microRNA profiling and function among population exposed to asbestos

目的探讨石棉暴露对接触人群血浆micro RNA(mi RNA)表达的影响。方法选取暴露组(暴露年限>10年)和对照组(未暴露)各3人,用mi RNA芯片比较两组对象血浆mi RNA表达差异,使用Target Scan、mi Randa和Pic Tar 3种在线软件对差异表达mi RNA进行靶基因预测,最后对靶基因进行基因本体论分析和全基因组及代谢途径数据库通路分析。结果 mi RNA芯片筛测结果显示,石棉暴露人群血浆中40个mi RNA的表达与对照组存在差异(P<0.05),其中有9个mi RNA信号值>500。对这些信号值>500的mi RNA的靶基因进行预测和通路分析,有5个mi RNA检索到相应的靶基因,这些基因主要参与肿瘤相关的信号通路和代谢通路,包括FGFR3等潜在功能靶点。结论石棉暴露可致接触人群血浆中mi RNA发生差异表达,其靶基因主要参与肿瘤相关的信号通路,但其在石棉相关疾病中的作用机制有待进一步研究。

Objective To investigate the effects of asbestos exposure on plasma miRNA expression.Methods Plasma samples were collected from control group and asbestos -exposed group (time of exposure >10 years)and three samples from each group were selected to detect differentially expressed miRNA using LC Sciences miRNA Microarray -Single.The target genes of differential miRNA were predicted by three kinds of online software,Target Scan,miRanda and PicTar.GO term enrichment and KEGG pathways were analyzed.Results The results of microarray indicated that there were 40 differential miRNA expression between exposed and control groups(P <0.05),and the signal value of 9 differential miRNA exceeded 500.After analyzing signal pathways of target genes of 5 miRNA,of which the signal values were over 500,these target genes were found mainly involved in pathways associated with cancer and metabolism,including potential function targets of FAS,TP53 and FGFR3.Conclusion Asbestos exposure can result in differentially expressed miRNA in the plasma from workers occupationally exposed to asbestos and the target genes of these miRNA may play important roles in the pathways of cancer.However,the mechanism of these miRNA in asbestos -related diseases needs to be further studied in the future.