Coexpression analysis of human genes across many microarray data sets

被引:562
作者
Lee, HK
Hsu, AK
Sajdak, J
Qin, J
Pavlidis, P [1 ]
机构
[1] Columbia Univ, Columbia Genome Ctr, New York, NY 10032 USA
[2] Columbia Univ, Coll Phys & Surg, New York, NY 10032 USA
[3] Columbia Univ, Dept Biomed Informat, New York, NY 10032 USA
关键词
D O I
10.1101/gr.1910904
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We present a large-scale analysis of mRNA coexpression based on 60 large human data sets containing a total of 3924 microarrays. We sought pairs of genes that were reliably coexpressed (based on the correlation of their expression profiles) in Multiple data sets, establishing a high-confidence network of 88O5 genes connected by 220,649 "coexpression links" that are observed in at least three data sets. Confirmed positive correlations between genes were much more common than confirmed negative correlations. We show that confirmation of coexpression in multiple data sets is correlated with functional relatedness, and show how cluster analysis of the network can reveal functionally coherent groups of genes. Our findings demonstrate how the large body of accumulated microarray data can be exploited to increase the reliability of inferences about gene function.
引用
收藏
页码:1085 / 1094
页数:10
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