The association between the HLA-G 14-bp insertion/deletion polymorphism and type 1 diabetes

Type 1 diabetes (T1D) is a multifactorial disease that has a strong genetic component. The HLA-G is a nonclassical HLA class I locus that is associated with immunomodulatory functions, including downregulation of innate and adaptive immune responses and induction of immune tolerance. However, there...

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Veröffentlicht in:Genes and immunity 2016-01, Vol.17 (1), p.13-18
Hauptverfasser: Silva, H P V, Ururahy, M A G, Souza, K S C, Loureiro, M B, Oliveira, Y M C, Oliveira, G H M, Luchessi, A D, Carvalho, K T C, Freitas, J C O C, Donadi, E A, Hirata, R D C, Almeida, M G, Arrais, R F, Hirata, M H, Rezende, A A
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container_issue 1
container_start_page 13
container_title Genes and immunity
container_volume 17
creator Silva, H P V
Ururahy, M A G
Souza, K S C
Loureiro, M B
Oliveira, Y M C
Oliveira, G H M
Luchessi, A D
Carvalho, K T C
Freitas, J C O C
Donadi, E A
Hirata, R D C
Almeida, M G
Arrais, R F
Hirata, M H
Rezende, A A
description Type 1 diabetes (T1D) is a multifactorial disease that has a strong genetic component. The HLA-G is a nonclassical HLA class I locus that is associated with immunomodulatory functions, including downregulation of innate and adaptive immune responses and induction of immune tolerance. However, there is currently limited information about the involvement of HLA-G in T1D susceptibility. This case-control study aims to investigate the T1D susceptibility association of alleles and genotypes of a widely investigated 14-bp insertion/deletion polymorphism in the HLA-G and to provide further evidence of the frequency distribution of class II HLA-DR-DQ -risk genotypes in T1D children and adolescents in the Brazilian population. The deletion allele and the homozygous deletion genotype are associated with susceptibility to T1D and the insertion allele and the heterozygous deletion/insertion genotype are associated with protection from T1D. We also confirm that genetic susceptibility to T1D is associated with the DRB1*03:01-DQA1*05:01-DQB1*02:01 and DRB1*04-DQA1*03:01-DQB1*03:02 haplotypes in Brazilian northeast region. The DR3-DQ2/DR4-DQ8 genotype conferred the highest detected risk for T1D. Our results identify a novel association of the 14-bp deletion allele and the homozygous deletion genotype with T1D development and provide additional evidence of the importance of HLA class II heterozygous DR3-DQ2/DR4-DQ8 genotype in T1D susceptibility.
doi_str_mv 10.1038/gene.2015.45
format Article
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The HLA-G is a nonclassical HLA class I locus that is associated with immunomodulatory functions, including downregulation of innate and adaptive immune responses and induction of immune tolerance. However, there is currently limited information about the involvement of HLA-G in T1D susceptibility. This case-control study aims to investigate the T1D susceptibility association of alleles and genotypes of a widely investigated 14-bp insertion/deletion polymorphism in the HLA-G and to provide further evidence of the frequency distribution of class II HLA-DR-DQ -risk genotypes in T1D children and adolescents in the Brazilian population. The deletion allele and the homozygous deletion genotype are associated with susceptibility to T1D and the insertion allele and the heterozygous deletion/insertion genotype are associated with protection from T1D. We also confirm that genetic susceptibility to T1D is associated with the DRB1*03:01-DQA1*05:01-DQB1*02:01 and DRB1*04-DQA1*03:01-DQB1*03:02 haplotypes in Brazilian northeast region. The DR3-DQ2/DR4-DQ8 genotype conferred the highest detected risk for T1D. Our results identify a novel association of the 14-bp deletion allele and the homozygous deletion genotype with T1D development and provide additional evidence of the importance of HLA class II heterozygous DR3-DQ2/DR4-DQ8 genotype in T1D susceptibility.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>26492519</pmid><doi>10.1038/gene.2015.45</doi><tpages>6</tpages></addata></record>
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source MEDLINE; Springer Nature - Complete Springer Journals
subjects 45/22
45/29
45/77
631/208/727/2000
631/250/249/1313/1418
Adaptive immunity
Adolescent
Alleles
Biomedical and Life Sciences
Biomedicine
Brazil
Cancer Research
Case-Control Studies
Child
Development and progression
Diabetes
Diabetes mellitus (insulin dependent)
Diabetes Mellitus, Type 1 - genetics
Diabetes Mellitus, Type 1 - immunology
Disease susceptibility
DQA1 protein
Drb1 protein
Female
Gene deletion
Gene Expression
Gene polymorphism
Genetic aspects
Genetic polymorphisms
Genetic Predisposition to Disease
Genetic research
Genotype & phenotype
Haplotypes
Health aspects
Histocompatibility antigen HLA
Histocompatibility antigens
HLA antigens
HLA histocompatibility antigens
HLA-D Antigens - genetics
HLA-D Antigens - immunology
HLA-G Antigens - genetics
HLA-G Antigens - immunology
Human Genetics
Humans
Immune response
Immunological tolerance
Immunology
Immunomodulation
Insertion
Male
original-article
Polymorphism
Polymorphism, Genetic
Population genetics
Risk factors
Susceptibility
Type 1 diabetes
title The association between the HLA-G 14-bp insertion/deletion polymorphism and type 1 diabetes
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