Integrated Bayesian analysis of rare exonic variants to identify risk genes for schizophrenia and neurodevelopmental disorders.
Hoang T. Nguyen,Julien Bryois,April Kim,April Kim,Amanda Dobbyn,Laura M. Huckins,Ana B. Muñoz-Manchado,Douglas M. Ruderfer,Giulio Genovese,Giulio Genovese,Menachem Fromer,Xinyi Xu,Dalila Pinto,Sten Linnarsson,Matthijs Verhage,August B. Smit,Jens Hjerling-Leffler,Joseph D. Buxbaum,Christina M. Hultman,Pamela Sklar,Shaun Purcell,Shaun Purcell,Kasper Lage,Kasper Lage,Xin He,Patrick Sullivan,Patrick Sullivan,Eli A. Stahl,Eli A. Stahl +28 more
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TLDR
A pipeline used in ASD studies is extended and applied to infer rare genetic parameters for SCZ and four NDDs and finds many new DD risk genes, supported by gene set enrichment and PPI network connectivity analyses.Abstract:
Integrating rare variation from trio family and case–control studies has successfully implicated specific genes contributing to risk of neurodevelopmental disorders (NDDs) including autism spectrum disorders (ASD), intellectual disability (ID), developmental disorders (DDs), and epilepsy (EPI). For schizophrenia (SCZ), however, while sets of genes have been implicated through the study of rare variation, only two risk genes have been identified. We used hierarchical Bayesian modeling of rare-variant genetic architecture to estimate mean effect sizes and risk-gene proportions, analyzing the largest available collection of whole exome sequence data for SCZ (1,077 trios, 6,699 cases, and 13,028 controls), and data for four NDDs (ASD, ID, DD, and EPI; total 10,792 trios, and 4,058 cases and controls). For SCZ, we estimate there are 1,551 risk genes. There are more risk genes and they have weaker effects than for NDDs. We provide power analyses to predict the number of risk-gene discoveries as more data become available. We confirm and augment prior risk gene and gene set enrichment results for SCZ and NDDs. In particular, we detected 98 new DD risk genes at FDR 0.55), but low between SCZ and the NDDs (ρ<0.3). An in-depth analysis of 288 NDD genes shows there is highly significant protein–protein interaction (PPI) network connectivity, and functionally distinct PPI subnetworks based on pathway enrichment, single-cell RNA-seq cell types, and multi-region developmental brain RNA-seq. We have extended a pipeline used in ASD studies and applied it to infer rare genetic parameters for SCZ and four NDDs (
https://github.com/hoangtn/extTADA
). We find many new DD risk genes, supported by gene set enrichment and PPI network connectivity analyses. We find greater similarity among NDDs than between NDDs and SCZ. NDD gene subnetworks are implicated in postnatally expressed presynaptic and postsynaptic genes, and for transcriptional and post-transcriptional gene regulation in prenatal neural progenitor and stem cells.read more
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Analysis of protein-coding genetic variation in 60,706 humans
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An integrated encyclopedia of DNA elements in the human genome.
TL;DR: The Encyclopedia of DNA Elements project provides new insights into the organization and regulation of the authors' genes and genome, and is an expansive resource of functional annotations for biomedical research.
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