arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.03355q-bio.GNcs.OHstat.ME
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深度通路分析的扩展:一个包含多维癌症基因组数据的通路路径分析框架

An Extension of Deep Pathway Analysis: A Pathway Route Analysis Framework Incorporating Multi-dimensional Cancer Genomics Data

Yue Zhao

摘要:

癌症研究的最新突破来自于新兴的通路分析领域。通过将统计方法应用于先前已知的基因和蛋白质调控信息,通路分析提供了一种有意义的方式来解释基因组数据。虽然已经研究了许多基因/蛋白质调控关系,但以前从未以基因/蛋白质调控网络和途径的有组织形式提供如此大量的数据。然而,通径分析的研究还处于起步阶段,尤其是在将其应用于解决实际问题时。在本文中,我们提出了一种新的方法来研究生物途径,交叉分析突变信息,转录组和蛋白质组学数据。利用这一结果,我们确定了可能导致疾病病因的异常途径。每个途径路径被编码为一个bavonet网络,该网络用一系列条件概率初始化,这些条件概率专门设计用于编码途径中编码的调控关系的方向性。更复杂的相互作用,如磷酸化和甲基化,在其他途径中,可以使用这种方法建模。我们的模型的有效性通过其区分真实途径与TCGA mRNA-seq上的诱饵、突变、拷贝数变异和乳腺癌和卵巢癌研究的磷酸化数据的能力来证明。大多数的途径可以通过生物学文献来证实。此外,正确识别途径的比例高于以前的工作,其中仅纳入乳腺癌患者的mRNA-seq突变数据。因此,这种结合更多样化数据的深入途径分析可以提高扰动途径检测的准确性。

英文摘要:

Recent breakthroughs in cancer research have come via the up-and-coming field of pathway analysis. By applying statistical methods to prior known gene and protein regulatory information, pathway analysis provides a meaningful way to interpret genomic data. While many gene/protein regulatory relationships have been studied, never before has such a significant amount data been made available in organized forms of gene/protein regulatory networks and pathways. However, pathway analysis research is still in its infancy, especially when applying it to solve practical problems. In this paper we propose a new method of studying biological pathways, one that cross analyzes mutation information, transcriptome and proteomics data. Using this outcome, we identify routes of aberrant pathways potentially responsible for the etiology of disease. Each pathway route is encoded as a bayesian network which is initialized with a sequence of conditional probabilities specifically designed to encode directionality of regulatory relationships encoded in the pathways. Far more complex interactions, such as phosphorylation and methylation, among others, in the pathways can be modeled using this approach. The effectiveness of our model is demonstrated through its ability to distinguish real pathways from decoys on TCGA mRNA-seq, mutation, Copy Number Variation and phosphorylation data for both Breast cancer and Ovarian cancer study. The majority of pathways distinguished can be confirmed by biological literature. Moreover, the proportion of correctly indentified pathways is \% higher than previous work where only mRNA-seq mutation data is incorporated for breast cancer patients. Consequently, such an in-depth pathway analysis incorporating more diverse data can give rise to the accuracy of perturbed pathway detection.

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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