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arXiv 1409.3899q-bio.GN
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用于联合成像和RNA测序数据分析的方法

Methods for Joint Imaging and RNA-seq Data Analysis

Junhai Jiang, Nan Lin, Shicheng Guo, Jinyun Chen, Momiao Xiong

摘要:

新兴的基因组和解剖成像数据的综合分析尚未得到很好的发展,提供了宝贵的信息,为整体发现疾病的基因组结构,并有可能打开一个新的途径,发现新的疾病易感基因,不能确定,如果他们被单独分析。成像和基因组数据分析成功的一个关键问题是如何减少它们的维度。用于成像信息提取和RNA测序数据简化的大多数先前方法不探索成像空间信息,并且通常忽略基因组位置水平上的基因表达变化。为了克服这些局限性,我们扩展功能主成分分析从一维到二维(2DFPCA)表示成像数据,并开发了一个多功能线性模型(MFLM),其中图像的功能主得分作为多个数量性状和跨基因的RNA测序作为一个功能预测器评估与图像的基因表达的关联。所开发的方法已应用于卵巢癌和KIRC研究的图像和RNA测序数据。我们分别鉴定了24个和84个基因,它们的表达与卵巢癌和KIRC研究中的成像变异相关。我们的研究结果表明,许多与图像显著相关的基因没有差异表达,但揭示了它们的形态和代谢功能。MFLM回归系数函数的峰值往往能发现剪接位点和多个基因表达亚型。

英文摘要:

Emerging integrative analysis of genomic and anatomical imaging data which has not been well developed, provides invaluable information for the holistic discovery of the genomic structure of disease and has the potential to open a new avenue for discovering novel disease susceptibility genes which cannot be identified if they are analyzed separately. A key issue to the success of imaging and genomic data analysis is how to reduce their dimensions. Most previous methods for imaging information extraction and RNA-seq data reduction do not explore imaging spatial information and often ignore gene expression variation at genomic positional level. To overcome these limitations, we extend functional principle component analysis from one dimension to two dimension (2DFPCA) for representing imaging data and develop a multiple functional linear model (MFLM) in which functional principal scores of images are taken as multiple quantitative traits and RNA-seq profile across a gene is taken as a function predictor for assessing the association of gene expression with images. The developed method has been applied to image and RNA-seq data of ovarian cancer and KIRC studies. We identified 24 and 84 genes whose expressions were associated with imaging variations in ovarian cancer and KIRC studies, respectively. Our results showed that many significantly associated genes with images were not differentially expressed, but revealed their morphological and metabolic functions. The results also demonstrated that the peaks of the estimated regression coefficient function in the MFLM often allowed the discovery of splicing sites and multiple isoform of gene expressions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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