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A non-negative matrix factorization method for detecting modules in heterogeneous omics multi-modal data

机译:一种用于检测异构组学多模态数据中模块的非负矩阵分解方法

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摘要

>Motivation: Recent advances in high-throughput omics technologies have enabled biomedical researchers to collect large-scale genomic data. As a consequence, there has been growing interest in developing methods to integrate such data to obtain deeper insights regarding the underlying biological system. A key challenge for integrative studies is the heterogeneity present in the different omics data sources, which makes it difficult to discern the coordinated signal of interest from source-specific noise or extraneous effects.>Results: We introduce a novel method of multi-modal data analysis that is designed for heterogeneous data based on non-negative matrix factorization. We provide an algorithm for jointly decomposing the data matrices involved that also includes a sparsity option for high-dimensional settings. The performance of the proposed method is evaluated on synthetic data and on real DNA methylation, gene expression and miRNA expression data from ovarian cancer samples obtained from The Cancer Genome Atlas. The results show the presence of common modules across patient samples linked to cancer-related pathways, as well as previously established ovarian cancer subtypes.>Availability and implementation: The source code repository is publicly available at .>Contact: >Supplementary information: are available at Bioinformatics online.
机译:>动机:高通量组学技术的最新进展使生物医学研究人员能够收集大规模的基因组数据。结果,人们对开发集成这些数据以获得有关基础生物学系统的更深刻见解的方法的兴趣日益增长。集成研究的关键挑战是不同的组学数据源中存在异质性,这使得很难从特定于源的噪声或外来效应中分辨出感兴趣的协调信号。>结果:一种基于非负矩阵分解的异构数据分析方法。我们提供了一种用于联合分解涉及的数据矩阵的算法,该算法还包括针对高维设置的稀疏性选项。根据从癌症基因组图谱获得的卵巢癌样品的合成数据和实际DNA甲基化,基因表达和miRNA表达数据,评估了所提出方法的性能。结果显示,与癌症相关途径相关的患者样本中存在通用模块,以及先前建立的卵巢癌亚型。>可用性和实现方式:源代码存储库可在。>上公开获得。联系人: >补充信息:可从在线生物信息学获得。

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