한국인 790명을 대상으로 한 HLA-A 및 HLA-DR 대립유전자 빈도 및 일배체형 연관성에 대한 종합적 분석
A Comprehensive Analysis of HLA-A and HLA-DR Allele Frequencies and Haplotype Associations in a Korean Population of 790 Individuals
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초록
Human leukocyte antigen (HLA) 시스템은 주조직 적합성 복합체(major histocompatibility complex, MHC)의 일부분으로, 자가 세포와 비자가 세포 및 항원을 구분하여 면역 반응에서 중요한 역할을 한다. HLA allele의 다양한 변이는 질병감수성과 면역 반응에 영향을 미치며, 이는 각기 다른 인구 집단에서 차이가 난다. 특히, HLA-A와 HLA-DRB1 allele은 다양한 면역 관련 질환과 연관되어 있어, 이러한 유전자의 빈도와haplotype의 연관성을 이해하는 것이 유전학적 및 면역학적 연구에서 매우 중요하다. 한국인에서 이러한 특성의 분포를 조사하기 위해, 서울중앙혈액원에 헌혈한 자원자들의 혈액에서peripheral blood mononuclear cell을 분리하고, 790명의샘플에 대해 HLA 유전자형 분석을 수행하였다. 연구 결과, HLA-A와 HLA-DRB1 allele은 한국인 집단에서 널리 분포하고 있으며, HLA-A*24:02 (21.7%)와 HLA-DRB1*09:01 (9.9%)이 가장 빈번하게 나타났다. 특정 HLA-A와 HLA-DRB1 allele 간의 중요한 haplotype 연관성이 카이제곱 검정을 통해확인되었으며, 이는 특정 유전자 조합이 질병 발병에 영향을 미칠 수 있음을 시사한다. 이러한 통찰은 질병에 대한 예측 및 예방전략 개발에 기여할 수 있다. 한국인 집단의 독특한 유전적 특성은 이 그룹에서 HLA allele과 haplotype 분포를 연구하는 것이질병 감수성을 이해하는 중요한 지표임을 강조한다.
Abstract
The human leukocyte antigen (HLA) system, which is part of the major histocompatibility complex (MHC) plays a vital role in immune responses by differentiating between itself and foreign cells and antigens. The significant diversity of alleles affects disease susceptibility and immune responses within different populations. Specifically, the HLA-A and HLA-DRB1 alleles are associated with various immune-related diseases, and understanding the frequency and haplotype associations of these alleles is vital for genetic and immunological research. To investigate the distribution of these characteristics in Koreans, we isolated peripheral blood mononuclear cells (PBMCs) from blood samples donated by volunteers at the Seoul Central Blood Bank and performed HLA typing on 790 samples. Our study found that the HLA-A and HLA-DRB1 alleles are widely distributed within the Korean population, with HLA-A*24:02 (21.7%) and HLA-DRB1*09:01 (9.9%) being the most frequent. Significant haplotype associations between specific HLA-A and HLA-DRB1 alleles were identified using the Chi-square test, suggesting that certain genetic combinations may influence disease onset. This insight could contribute to the development of predictive and preventative strategies for various diseases. The unique genetic characteristics of the Korean population highlight the importance of studying the HLA allele and the haplotype distributions in this group as key indicators for understanding disease susceptibility.
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