Guilt by rewiring: gene prioritization through network rewiring in Genome Wide Association Studies
Year: 2013
Type: article
Abstract: Although Genome Wide Association Studies (GWAS) have identified many susceptibility loci for common diseases, they only explain a small portion of heritability. It is challenging to identify the remaining disease loci because their association signals are likely weak and difficult to identify among millions of candidates. One potentially useful direction to increase statistical power is to incorporate functional genomics information, especially gene expression networks, to prioritize GWAS signals. Most current methods utilizing network information to prioritize disease genes are based on the 'guilt by association' principle, in which networks are treated as static, and disease-associated genes are assumed to locate closer with each other than random pairs in the network. In contrast, we propose a novel 'guilt by rewiring' principle. Studying the dynamics of gene networks between controls and patients, this principle assumes that disease genes more likely undergo rewiring in patients, whereas most of the network remains unaffected in disease condition. To demonstrate this principle, we consider the changes of co-expression networks in Crohn's disease patients and controls, and how network dynamics reveals information on disease associations. Our results demonstrate that network rewiring is abundant in the immune system, and disease-associated genes are more likely to be rewired in patients. To integrate this network rewiring feature and GWAS signals, we propose to use the Markov random field framework to integrate network information to prioritize genes. Applications in Crohn's disease and Parkinson's disease show that this framework leads to more replicable results, and implicates potentially disease-associated pathways.
Source: Human Molecular Genetics
DOI: 10.1093/hmg/ddt668
Authors: L. Hou, M. Chen, C. K. Zhang, J. Cho, H. Zhao
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
Funders: National Institutes of Health, National Cancer Institute, National Institute of General Medical Sciences, National Institute of Diabetes and Digestive and Kidney Diseases, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Center for Research Resources, National Center for Advancing Translational Sciences
Awards: G2687828324, G2835737691, G3636177618, G3930030549, G4027004511, G5131402472, Statistical Methods to Map Genes for Complex Traits, Defining the genetic architecture of IBD in Ashkenazi Jewish populations, G7976442279, Yale University Clinical and Translational Science Award Program, Yale University Clinical and Translational Science Award Program, Inflammatory Bowel Disease Genetics Consortium Data Coordinating Center, Mount Sinai NYC Genetics Research Center: Multi-omic integration across data-types, cell niches and populations
OpenAlex ID: W2147356740