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1.
Nat Commun ; 10(1): 2837, 2019 06 28.
Artigo em Inglês | MEDLINE | ID: mdl-31253775

RESUMO

The diagnostic yield of exome and genome sequencing remains low (8-70%), due to incomplete knowledge on the genes that cause disease. To improve this, we use RNA-seq data from 31,499 samples to predict which genes cause specific disease phenotypes, and develop GeneNetwork Assisted Diagnostic Optimization (GADO). We show that this unbiased method, which does not rely upon specific knowledge on individual genes, is effective in both identifying previously unknown disease gene associations, and flagging genes that have previously been incorrectly implicated in disease. GADO can be run on www.genenetwork.nl by supplying HPO-terms and a list of genes that contain candidate variants. Finally, applying GADO to a cohort of 61 patients for whom exome-sequencing analysis had not resulted in a genetic diagnosis, yields likely causative genes for ten cases.


Assuntos
Regulação da Expressão Gênica/fisiologia , Predisposição Genética para Doença , Análise de Sequência de RNA/métodos , Transcriptoma , Bases de Dados de Ácidos Nucleicos , Humanos , Modelos Genéticos , Análise de Componente Principal , Software , Interface Usuário-Computador
2.
Brain ; 140(11): 2860-2878, 2017 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-29053796

RESUMO

The autosomal dominant cerebellar ataxias, referred to as spinocerebellar ataxias in genetic nomenclature, are a rare group of progressive neurodegenerative disorders characterized by loss of balance and coordination. Despite the identification of numerous disease genes, a substantial number of cases still remain without a genetic diagnosis. Here, we report five novel spinocerebellar ataxia genes, FAT2, PLD3, KIF26B, EP300, and FAT1, identified through a combination of exome sequencing in genetically undiagnosed families and targeted resequencing of exome candidates in a cohort of singletons. We validated almost all genes genetically, assessed damaging effects of the gene variants in cell models and further consolidated a role for several of these genes in the aetiology of spinocerebellar ataxia through network analysis. Our work links spinocerebellar ataxia to alterations in synaptic transmission and transcription regulation, and identifies these as the main shared mechanisms underlying the genetically diverse spinocerebellar ataxia types.


Assuntos
Redes Reguladoras de Genes/genética , Ataxias Espinocerebelares/genética , Animais , Células COS , Caderinas/genética , Cercopithecus aethiops , Proteína p300 Associada a E1A/genética , Exoma/genética , Feminino , Células HEK293 , Humanos , Cinesina/genética , Masculino , Linhagem , Fosfolipase D/genética , Plasmídeos , Reação em Cadeia da Polimerase em Tempo Real , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Análise de Sequência de DNA , Transfecção
3.
Nat Commun ; 6: 5890, 2015 Jan 19.
Artigo em Inglês | MEDLINE | ID: mdl-25597830

RESUMO

The main challenge for gaining biological insights from genetic associations is identifying which genes and pathways explain the associations. Here we present DEPICT, an integrative tool that employs predicted gene functions to systematically prioritize the most likely causal genes at associated loci, highlight enriched pathways and identify tissues/cell types where genes from associated loci are highly expressed. DEPICT is not limited to genes with established functions and prioritizes relevant gene sets for many phenotypes.


Assuntos
Estudo de Associação Genômica Ampla/métodos , Software
4.
Nat Genet ; 47(2): 115-25, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25581432

RESUMO

Many cancer-associated somatic copy number alterations (SCNAs) are known. Currently, one of the challenges is to identify the molecular downstream effects of these variants. Although several SCNAs are known to change gene expression levels, it is not clear whether each individual SCNA affects gene expression. We reanalyzed 77,840 expression profiles and observed a limited set of 'transcriptional components' that describe well-known biology, explain the vast majority of variation in gene expression and enable us to predict the biological function of genes. On correcting expression profiles for these components, we observed that the residual expression levels (in 'functional genomic mRNA' profiling) correlated strongly with copy number. DNA copy number correlated positively with expression levels for 99% of all abundantly expressed human genes, indicating global gene dosage sensitivity. By applying this method to 16,172 patient-derived tumor samples, we replicated many loci with aberrant copy numbers and identified recurrently disrupted genes in genomically unstable cancers.


Assuntos
Variações do Número de Cópias de DNA , Dosagem de Genes , Regulação Neoplásica da Expressão Gênica/genética , Genômica , Neoplasias/genética , Transcriptoma , Hibridização Genômica Comparativa , Perfilação da Expressão Gênica , Redes Reguladoras de Genes , Loci Gênicos , Humanos , RNA Mensageiro/genética , RNA Neoplásico/genética
5.
Nat Genet ; 46(9): 957-63, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25108383

RESUMO

Hypospadias is a common congenital condition in boys in which the urethra opens on the underside of the penis. We performed a genome-wide association study on 1,006 surgery-confirmed hypospadias cases and 5,486 controls from Denmark. After replication genotyping of an additional 1,972 cases and 1,812 controls from Denmark, the Netherlands and Sweden, 18 genomic regions showed independent association with P < 5 × 10(-8). Together, these loci explain 9% of the liability to developing this condition. Several of the identified regions harbor genes with key roles in embryonic development (including HOXA4, IRX5, IRX6 and EYA1). Subsequent pathway analysis with GRAIL and DEPICT provided additional insight into possible genetic mechanisms causing hypospadias.


Assuntos
Genes Controladores do Desenvolvimento , Hipospadia/genética , Estudos de Casos e Controles , Dinamarca , Feminino , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla/métodos , Genótipo , Humanos , Masculino , Países Baixos , Polimorfismo de Nucleotídeo Único , Suécia
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