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1.
Nat Commun ; 12(1): 2182, 2021 04 12.
Artigo em Inglês | MEDLINE | ID: mdl-33846329

RESUMO

Autosomal genetic analyses of blood lipids have yielded key insights for coronary heart disease (CHD). However, X chromosome genetic variation is understudied for blood lipids in large sample sizes. We now analyze genetic and blood lipid data in a high-coverage whole X chromosome sequencing study of 65,322 multi-ancestry participants and perform replication among 456,893 European participants. Common alleles on chromosome Xq23 are strongly associated with reduced total cholesterol, LDL cholesterol, and triglycerides (min P = 8.5 × 10-72), with similar effects for males and females. Chromosome Xq23 lipid-lowering alleles are associated with reduced odds for CHD among 42,545 cases and 591,247 controls (P = 1.7 × 10-4), and reduced odds for diabetes mellitus type 2 among 54,095 cases and 573,885 controls (P = 1.4 × 10-5). Although we observe an association with increased BMI, waist-to-hip ratio adjusted for BMI is reduced, bioimpedance analyses indicate increased gluteofemoral fat, and abdominal MRI analyses indicate reduced visceral adiposity. Co-localization analyses strongly correlate increased CHRDL1 gene expression, particularly in adipose tissue, with reduced concentrations of blood lipids.


Assuntos
Fatores de Risco Cardiometabólico , Cromossomos Humanos X/genética , Lipídeos/sangue , Proteínas do Olho/metabolismo , Feminino , Regulação da Expressão Gênica , Estudos de Associação Genética , Loci Gênicos , Predisposição Genética para Doença , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Proteínas do Tecido Nervoso/metabolismo , Fenômica , Polimorfismo de Nucleotídeo Único/genética , Tela Subcutânea/metabolismo , Sequenciamento Completo do Genoma
2.
Am J Epidemiol ; 190(10): 1977-1992, 2021 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-33861317

RESUMO

Genotype-phenotype association studies often combine phenotype data from multiple studies to increase statistical power. Harmonization of the data usually requires substantial effort due to heterogeneity in phenotype definitions, study design, data collection procedures, and data-set organization. Here we describe a centralized system for phenotype harmonization that includes input from phenotype domain and study experts, quality control, documentation, reproducible results, and data-sharing mechanisms. This system was developed for the National Heart, Lung, and Blood Institute's Trans-Omics for Precision Medicine (TOPMed) program, which is generating genomic and other -omics data for more than 80 studies with extensive phenotype data. To date, 63 phenotypes have been harmonized across thousands of participants (recruited in 1948-2012) from up to 17 studies per phenotype. Here we discuss challenges in this undertaking and how they were addressed. The harmonized phenotype data and associated documentation have been submitted to National Institutes of Health data repositories for controlled access by the scientific community. We also provide materials to facilitate future harmonization efforts by the community, which include 1) the software code used to generate the 63 harmonized phenotypes, enabling others to reproduce, modify, or extend these harmonizations to additional studies, and 2) the results of labeling thousands of phenotype variables with controlled vocabulary terms.


Assuntos
Estudos de Associação Genética/métodos , Fenômica/métodos , Medicina de Precisão/métodos , Agregação de Dados , Humanos , Disseminação de Informação , National Heart, Lung, and Blood Institute (U.S.) , Fenótipo , Avaliação de Programas e Projetos de Saúde , Estados Unidos
4.
Nature ; 586(7831): 763-768, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-33057201

RESUMO

Age is the dominant risk factor for most chronic human diseases, but the mechanisms through which ageing confers this risk are largely unknown1. The age-related acquisition of somatic mutations that lead to clonal expansion in regenerating haematopoietic stem cell populations has recently been associated with both haematological cancer2-4 and coronary heart disease5-this phenomenon is termed clonal haematopoiesis of indeterminate potential (CHIP)6. Simultaneous analyses of germline and somatic whole-genome sequences provide the opportunity to identify root causes of CHIP. Here we analyse high-coverage whole-genome sequences from 97,691 participants of diverse ancestries in the National Heart, Lung, and Blood Institute Trans-omics for Precision Medicine (TOPMed) programme, and identify 4,229 individuals with CHIP. We identify associations with blood cell, lipid and inflammatory traits that are specific to different CHIP driver genes. Association of a genome-wide set of germline genetic variants enabled the identification of three genetic loci associated with CHIP status, including one locus at TET2 that was specific to individuals of African ancestry. In silico-informed in vitro evaluation of the TET2 germline locus enabled the identification of a causal variant that disrupts a TET2 distal enhancer, resulting in increased self-renewal of haematopoietic stem cells. Overall, we observe that germline genetic variation shapes haematopoietic stem cell function, leading to CHIP through mechanisms that are specific to clonal haematopoiesis as well as shared mechanisms that lead to somatic mutations across tissues.


Assuntos
Hematopoiese Clonal/genética , Predisposição Genética para Doença , Genoma Humano/genética , Sequenciamento Completo do Genoma , Adulto , África/etnologia , Grupo com Ancestrais do Continente Africano/genética , Idoso , Idoso de 80 Anos ou mais , Autorrenovação Celular/genética , Proteínas de Ligação a DNA/genética , Feminino , Mutação em Linhagem Germinativa/genética , Células-Tronco Hematopoéticas/citologia , Células-Tronco Hematopoéticas/metabolismo , Humanos , Peptídeos e Proteínas de Sinalização Intracelular/genética , Masculino , Pessoa de Meia-Idade , National Heart, Lung, and Blood Institute (U.S.) , Fenótipo , Medicina de Precisão , Proteínas Proto-Oncogênicas/genética , Proteínas com Motivo Tripartido/genética , Estados Unidos , alfa Carioferinas/genética
5.
Nat Genet ; 52(9): 969-983, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32839606

RESUMO

Large-scale whole-genome sequencing studies have enabled the analysis of rare variants (RVs) associated with complex phenotypes. Commonly used RV association tests have limited scope to leverage variant functions. We propose STAAR (variant-set test for association using annotation information), a scalable and powerful RV association test method that effectively incorporates both variant categories and multiple complementary annotations using a dynamic weighting scheme. For the latter, we introduce 'annotation principal components', multidimensional summaries of in silico variant annotations. STAAR accounts for population structure and relatedness and is scalable for analyzing very large cohort and biobank whole-genome sequencing studies of continuous and dichotomous traits. We applied STAAR to identify RVs associated with four lipid traits in 12,316 discovery and 17,822 replication samples from the Trans-Omics for Precision Medicine Program. We discovered and replicated new RV associations, including disruptive missense RVs of NPC1L1 and an intergenic region near APOC1P1 associated with low-density lipoprotein cholesterol.


Assuntos
Predisposição Genética para Doença/genética , Variação Genética/genética , Genoma/genética , LDL-Colesterol/genética , Simulação por Computador , Estudo de Associação Genômica Ampla/métodos , Humanos , Modelos Genéticos , Anotação de Sequência Molecular/métodos , Fenótipo , Sequenciamento Completo do Genoma/métodos
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