Genetic regulation of serum IgA levels and susceptibility to common immune, infectious, kidney, and cardio-metabolic traits.
Nat Commun
; 13(1): 6859, 2022 11 11.
Article
en En
| MEDLINE
| ID: mdl-36369178
Immunoglobulin A (IgA) mediates mucosal responses to food antigens and the intestinal microbiome and is involved in susceptibility to mucosal pathogens, celiac disease, inflammatory bowel disease, and IgA nephropathy. We performed a genome-wide association study of serum IgA levels in 41,263 individuals of diverse ancestries and identified 20 genome-wide significant loci, including 9 known and 11 novel loci. Co-localization analyses with expression QTLs prioritized candidate genes for 14 of 20 significant loci. Most loci encoded genes that produced immune defects and IgA abnormalities when genetically manipulated in mice. We also observed positive genetic correlations of serum IgA levels with IgA nephropathy, type 2 diabetes, and body mass index, and negative correlations with celiac disease, inflammatory bowel disease, and several infections. Mendelian randomization supported elevated serum IgA as a causal factor in IgA nephropathy. African ancestry was consistently associated with higher serum IgA levels and greater frequency of IgA-increasing alleles compared to other ancestries. Our findings provide novel insights into the genetic regulation of IgA levels and its potential role in human disease.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Enfermedades Inflamatorias del Intestino
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Enfermedad Celíaca
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Diabetes Mellitus Tipo 2
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Glomerulonefritis por IGA
Tipo de estudio:
Clinical_trials
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Prognostic_studies
Límite:
Animals
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Humans
Idioma:
En
Año:
2022
Tipo del documento:
Article