Frequencies of 10 autosomal minor histocompatibility antigens in Korean population and estimated disparities in unrelated hematopoietic stem cell transplantation

Authors

  • H. Jung,

    1. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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  • C. S. Ki,

    1. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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  • J. W. Kim,

    1. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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  • E. S. Kang

    Corresponding author
    1. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
      Eun-Suk Kang, MD, PhD
      Department of Laboratory Medicine & Genetics
      Samsung Medical Center
      Sungkyunkwan University School of Medicine
      50 Ilwon-dong
      Gangnam-gu
      Seoul 135-710
      Korea
      Tel: +82 2 3410 2703
      Fax: +82 2 3410 2719
      e-mail: eskang@skku.edu
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Eun-Suk Kang, MD, PhD
Department of Laboratory Medicine & Genetics
Samsung Medical Center
Sungkyunkwan University School of Medicine
50 Ilwon-dong
Gangnam-gu
Seoul 135-710
Korea
Tel: +82 2 3410 2703
Fax: +82 2 3410 2719
e-mail: eskang@skku.edu

Abstract

Disparity of minor histocompatibility antigens (mHAs) is known to induce graft-versus-tumor and graft-versus-host disease reactions in stem cell transplantation. Not much information is available on genotypic and phenotypic distributions of the currently identified mHAs, especially in Korean population. Therefore, we report genotype and phenotype frequency analyses of 10 autosomal mHAs in 329 unrelated healthy Koreans using the Sequenom MassARRAY matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) system and polymerase chain reaction-sequence specific primers (PCR-SSP). Estimates of the probability of immunogenic mismatches between donor/recipient pairs were made from observed phenotypic frequencies. HA-1 was the most favorable mHA for clinical application with the highest disparity of 7.0%. Similar results were obtained in ACC-1. The Korean population can benefit the most in a setting of matched major histocompatibility complex (MHC)-restricted mHAs-mismatched unrelated hematopoietic stem cell transplantations with the disparity rate of 27.5% with eight hematopoietic mHAs. This is the first comprehensive report on the genotypic and phenotypic frequency distributions of human mHAs in the Korean population. It can contribute to not only donor selection before transplantation but also therapeutic approaches after transplantation. It is expected that mHA-based immunotherapy will lead to a new treatment modality tailored for patients at high risk of relapse following allogeneic hematopoietic cell transplantation.

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