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Application of a Deep Matrix Factorization Model on Integrated Gene Expression Data

[ Vol. 15 , Issue. 4 ]

Author(s):

Yong-Jing Hao, Mi-Xiao Hou, Ying-Lian Gao, Jin-Xing Liu* and Xiang-Zhen Kong   Pages 359 - 367 ( 9 )

Abstract:


Background: Non-negative Matrix Factorization (NMF) has been extensively used in gene expression data. However, most NMF-based methods have single-layer structures, which may achieve poor performance for complex data. Deep learning, with its carefully designed hierarchical structure, has shown significant advantages in learning data features.

Objective: In bioinformatics, on the one hand, to discover differentially expressed genes in gene expression data; on the other hand, to obtain higher sample clustering results. It can provide the reference value for the prevention and treatment of cancer.

Method: In this paper, we apply a deep NMF method called Deep Semi-NMF on the integrated gene expression data. In each layer, the coefficient matrix is directly decomposed into the basic and coefficient matrix of the next layer. We apply this factorization model on The Cancer Genome Atlas (TCGA) genomic data.

Results: The experimental results demonstrate the superiority of Deep Semi-NMF method in identifying differentially expressed genes and clustering samples.

Conclusion: The Deep Semi-NMF model decomposes a matrix into multiple matrices and multiplies them to form a matrix. It can also improve the clustering performance of samples while digging out more accurate key genes for disease treatment.

Keywords:

NMF, gene expression data, TCGA, deep semi-NMF, feature selection, clustering.

Affiliation:

School of Information Science and Engineering, Qufu Normal University, Rizhao, School of Information Science and Engineering, Qufu Normal University, Rizhao, Library of Qufu Normal University, Qufu Normal University, Rizhao, School of Information Science and Engineering, Qufu Normal University, Rizhao, School of Information Science and Engineering, Qufu Normal University, Rizhao



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