An integrative tissue-network approach to identify and test human disease genes.

TitleAn integrative tissue-network approach to identify and test human disease genes.
Publication TypeJournal Article
Year of Publication2018
AuthorsYao V, Kaletsky R, Keyes W, Mor DE, Wong AK, Sohrabi S, Murphy CT, Troyanskaya OG
JournalNat Biotechnol
Date Published2018 Oct 22
ISSN1546-1696
Abstract

Effective discovery of causal disease genes must overcome the statistical challenges of quantitative genetics studies and the practical limitations of human biology experiments. Here we developed diseaseQUEST, an integrative approach that combines data from human genome-wide disease studies with in silico network models of tissue- and cell-type-specific function in model organisms to prioritize candidates within functionally conserved processes and pathways. We used diseaseQUEST to predict candidate genes for 25 different diseases and traits, including cancer, longevity, and neurodegenerative diseases. Focusing on Parkinson's disease (PD), a diseaseQUEST-directed Caenhorhabditis elegans behavioral screen identified several candidate genes, which we experimentally verified and found to be associated with age-dependent motility defects mirroring PD clinical symptoms. Furthermore, knockdown of the top candidate gene, bcat-1, encoding a branched chain amino acid transferase, caused spasm-like 'curling' and neurodegeneration in C. elegans, paralleling decreased BCAT1 expression in PD patient brains. diseaseQUEST is modular and generalizable to other model organisms and human diseases of interest.

DOI10.1038/nbt.4246
Alternate JournalNat. Biotechnol.
Full Text
PubMed ID30346941