HLA antigens and primary open-angle glaucoma in black Americans

Area of Science:

• Immunogenetics
• Ophthalmology
• Human Leukocyte Antigen (HLA) System

Background:

• Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness worldwide.
• Genetic factors, including human leukocyte antigen (HLA) genes, are implicated in POAG pathogenesis.
• Previous studies suggest racial disparities in POAG prevalence and genetic associations.

Purpose of the Study:

• To investigate the association of specific HLA antigen frequencies with POAG in Black and White patient cohorts.
• To compare HLA antigen profiles between POAG patients and healthy controls within each racial group.
• To identify potential race-specific genetic markers for POAG susceptibility.

Main Methods:

• Case-control study comparing HLA antigen frequencies.
• Analysis of HLA-A, HLA-B, and HLA-DR loci.
• Statistical comparison between patients with primary open-angle glaucoma and non-glaucomatous individuals across racial groups.

Main Results:

• Black patients with POAG showed increased HLA-B7 and HLA-B12, and decreased HLA-A1 and HLA-A11 frequencies compared to controls.
• White patients with POAG shared increased HLA-B7, HLA-B12, and decreased HLA-A11 frequencies with Black patients.
• White patients with POAG additionally exhibited increased HLA-A3 and decreased HLA-Bw35 frequencies, not observed in Black patients.

Conclusions:

• Specific HLA antigen profiles are associated with primary open-angle glaucoma in both Black and White populations.
• Distinct HLA antigen associations exist between racial groups, suggesting differential genetic contributions to POAG.
• HLA antigen typing may offer insights into the complex genetic basis of POAG and inform personalized risk assessment.