两种方法对肾小球RNA测序数据均一化效果的研究

    Effect of different methods upon data homogenization of glomerular RNA sequencing

    • 摘要: 目的 利用不同方法对人肾小球RNA测序数据均一化效果进行了研究,寻找一种能更好地均一化处理数据的方法。方法 选取肾癌手术患者的癌旁组织,利用筛网技术提取肾小球。采用Trizol方法提取肾小球RNA,利用Ion Xpress平台进行测序。利用DESEQ2软件中的rlog和median/ratio方法对测序数据结果进行均一化。采用R package软件中的PCA进行数据分析,Pheatmap和GGPLOT2程序进行绘图。结果 Ion Xpress推荐的常规rlog方法不能很好的将数据均一化,Deseq2软件的median/ratio具有较好的数据均一化作用。通过选取8个看家基因进行了聚类分析,发现看家基因在kmeans的三个分类中未显示明显的差别,证明了数据均一化结果的可靠性。结论 Deseq2软件的median/ratio方法能够用于肾小球的RNA测序结果的数据处理,具有较好的数据均一化作用。

       

      Abstract: Objective RNA sequencing is a common technique for gene expression profiling. The goal was to examine the effects of different methods upon data homogenization of glomerular RNA sequencing and seek an optimal mode of data processing.Methods The adjacent tissues of kidney cancer were harvested and glomeruli extracted by screen technology. Trizol method was employed for extracting glomerular RNA. Then RNA data were acquired by Ion Xpress deep sequencing. PCA analysis was performed with the PCA data in R package. And rlog and median/ratio of DESEQ2 were utilized for data homogenization. Pheatmap and GGPLOT2 in R package were used for drawing a heat map.Results The conventional rlog method recommended by Ion Xpress could not well homogenize the data while the median/ratio of Deseq2 software offered better data homogenization. Cluster analysis was performed by selecting eight housekeeping genes. Housekeeping genes showed no significant differences among three classifications of kmeans. Thus it proved the reliability of the data homogenization results.Conclusion The median/ratio method of Deseq2 software may be employed for processing the data of glomerular RNA sequencing. And it has a better effect of data homogenization.

       

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