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2016 ; 2
(ä): 16012
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Schizophrenia interactome with 504 novel protein-protein interactions
#MMPMID27336055
Ganapathiraju MK
; Thahir M
; Handen A
; Sarkar SN
; Sweet RA
; Nimgaonkar VL
; Loscher CE
; Bauer EM
; Chaparala S
NPJ Schizophr
2016[]; 2
(ä): 16012
PMID27336055
show ga
Genome-wide association studies of schizophrenia (GWAS) have revealed the role of
rare and common genetic variants, but the functional effects of the risk variants
remain to be understood. Protein interactome-based studies can facilitate the
study of molecular mechanisms by which the risk genes relate to schizophrenia
(SZ) genesis, but protein-protein interactions (PPIs) are unknown for many of the
liability genes. We developed a computational model to discover PPIs, which is
found to be highly accurate according to computational evaluations and
experimental validations of selected PPIs. We present here, 365 novel PPIs of
liability genes identified by the SZ Working Group of the Psychiatric Genomics
Consortium (PGC). Seventeen genes that had no previously known interactions have
57 novel interactions by our method. Among the new interactors are 19 drug
targets that are targeted by 130 drugs. In addition, we computed 147 novel PPIs
of 25 candidate genes investigated in the pre-GWAS era. While there is little
overlap between the GWAS genes and the pre-GWAS genes, the interactomes reveal
that they largely belong to the same pathways, thus reconciling the apparent
disparities between the GWAS and prior gene association studies. The interactome
including 504 novel PPIs overall, could motivate other systems biology studies
and trials with repurposed drugs. The PPIs are made available on a webserver,
called Schizo-Pi at http://severus.dbmi.pitt.edu/schizo-pi with advanced search
capabilities.