Human Leukocyte Antigen Class I B and C Loci Contribute to Type 1 Diabetes (T1D) Susceptibility and Age at T1D Onset
Overview
Affiliations
Alleles of human leukocyte antigen (HLA) class II genes are well known to affect susceptibility to type 1 diabetes (T1D), but less is known about the contribution of HLA class I alleles to T1D susceptibility. In this study, molecular genotyping was performed at the HLA-B and HLA-C loci for 283 multiplex Caucasian families, previously typed for HLA-A and the class II loci. Allele frequencies were compared between affected siblings and affected family-based controls. Linkage disequilibrium coefficients were calculated for HLA-B-HLA-C haplotypes and for class I-lass II haplotypes. After adjustment for linkage disequilibrium, the following alleles remain associated with T1D: B*1801, B*3906, B*4403, C*0303, C*0802, and C*1601. B and C allele associations were tested for certain T1D-associated DRB1-DQB1 haplotypes, with the following results: B*3801 is protective on DRB1*0401-DQB1*0302 haplotypes, both C*0701 and C*0702 are predisposing on DRB1*0404-DQB1*0302 haplotypes, and B*3906 is predisposing on DRB1*0801-DQB1*0402 haplotypes. As with previous results for HLA-A, HLA-B and HLA-C are associated with age at T1D onset (mean 11.6 +/- 0.3 years). The protective allele B*4403 was associated with older age at onset (15.1 years; p < 0.04), and the predisposing alleles C*0702 and B*3906 were associated with younger age at onset (9.5 years, p < 0.001; and 7.8 years, p < 0.002, respectively). These data support a role for HLA class I alleles in susceptibility to and age at onset of T1D.
Noble J Front Immunol. 2024; 15:1457213.
PMID: 39328411 PMC: 11424550. DOI: 10.3389/fimmu.2024.1457213.
Robino A, Bevilacqua E, Aldegheri L, Conti A, Bazzo V, Tornese G Front Immunol. 2024; 15:1427349.
PMID: 39185409 PMC: 11341356. DOI: 10.3389/fimmu.2024.1427349.
MethPhaser: methylation-based long-read haplotype phasing of human genomes.
Fu Y, Aganezov S, Mahmoud M, Beaulaurier J, Juul S, Treangen T Nat Commun. 2024; 15(1):5327.
PMID: 38909018 PMC: 11193733. DOI: 10.1038/s41467-024-49588-0.
Human insulin as both antigen and protector in type 1 diabetes.
Amdare N, Shultz L, Greiner D, DiLorenzo T Eur J Immunol. 2024; 54(9):e2350949.
PMID: 38778498 PMC: 11563931. DOI: 10.1002/eji.202350949.
Differences in F pocket impact on HLA I genetic associations with autoimmune diabetes.
Ren X, Amarajeewa A, Jayasinghe M, Garstka M Front Immunol. 2024; 15:1342335.
PMID: 38596688 PMC: 11003304. DOI: 10.3389/fimmu.2024.1342335.