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The HLA system in the Korean population.

S J Kim, B Nisperos, E Mickelson

Human Immunology

|November 1, 1986

Summary

This study analyzed human leukocyte antigen (HLA) frequencies and linked genetic markers in 162 Koreans. Findings reveal distinct Korean HLA profiles compared to other Asian and Caucasian populations, highlighting unique genetic characteristics.

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Area of Science:

Immunogenetics
Population Genetics
Molecular Anthropology

Background:

The human leukocyte antigen (HLA) system plays a crucial role in immune response and is highly polymorphic.
Understanding HLA antigen and haplotype frequencies in diverse populations is essential for transplantation, disease association studies, and evolutionary research.

Purpose of the Study:

To determine the frequencies of various HLA antigens (Class I and Class II), HLA-D defined haplotypes, and closely linked genetic markers in a healthy Korean population.
To compare these frequencies with those of other ethnic groups, specifically Chinese, Japanese, and Caucasians, to identify population-specific genetic characteristics.

Main Methods:

Genotyping of HLA-A, B, C, DR, and DQ antigens using serological and/or molecular methods.
Analysis of HLA-D haplotypes and HLA-linked markers including Glyoxalase I (GLO), Factor B (Bf), C2, and C4.
Statistical analysis of allele and haplotype frequencies and assessment of linkage disequilibrium.

Main Results:

Identified high-frequency HLA antigens (e.g., A2, B44, DR4) and genetic markers (e.g., GLO-2, BfS) in Koreans.
Observed absence of specific HLA antigens (e.g., A23, B18) in the studied Korean cohort.
HLA-DR4 was the most common Class II antigen, associated with specific HLA-D haplotypes (Dw4, Dw10, Dw13, Dw15).
Significant linkage disequilibrium was observed between several HLA alleles and haplotypes.
Koreans exhibited shared HLA characteristics with other Oriental populations but also possessed distinct allelic frequencies and haplotypes.

Conclusions:

The study provides a comprehensive profile of HLA and linked genetic marker frequencies in Koreans.
The findings underscore the genetic distinctiveness of the Korean population within the broader East Asian context.
This data is valuable for future genetic research, anthropological studies, and clinical applications involving the Korean population.