Aberrant expression of BCL2A1-restricted minor histocompatibility antigens in melanoma cells: application for allogeneic transplantation

  • Hiroki Torikai
  • Yoshiki Akatsuka
  • Yasushi Yatabe
  • Yasuo Morishima
  • Yoshihisa Kodera
  • Kiyotaka Kuzushima
  • Toshitada Takahashi
Original Article


It has been shown that allogeneic hematopoietic stem cell transplantation (HSCT) can be one of the therapeutic options for patients with metastatic solid tumors, such as renal cancer. However, the development of relatively severe GVHD seems to be necessary to achieve tumor regression in the current setting. Thus, it is crucial to identify minor histocompatibility antigens (mHags) only expressed in tumor cells but not GVHD target organs. In this study, we examined whether three mHags: ACC-1 and ACC-2 encoded by BCL2A1, and HA-1 encoded by HMHA1, could serve as such targets for melanoma. Real-time PCR and immunohistochemical analysis revealed that the expression of both BCL2A1and HMHA1 in melanoma cell lines and primary melanoma cells was comparable to that of hematopoietic cells. Indeed, melanoma cell lines were efficiently lysed by cytotoxic T lymphocytes specific for ACC-1, ACC-2, and HA-1. Our data suggest that targeting mHags encoded not only by HMHA1, whose aberrant expression in solid tumors has been reported, but also BCL2A1 may bring about beneficial selective graft-versus-tumor effects in a population of melanoma patients for whom these mHags are applicable.


Minor histocompatibility antigen Allogeneic hematopoietic stem cell transplantation Melanoma 


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Copyright information

© The Japanese Society of Hematology 2008

Authors and Affiliations

  • Hiroki Torikai
    • 1
  • Yoshiki Akatsuka
    • 1
  • Yasushi Yatabe
    • 2
  • Yasuo Morishima
    • 3
  • Yoshihisa Kodera
    • 4
  • Kiyotaka Kuzushima
    • 1
  • Toshitada Takahashi
    • 1
  1. 1.Division of ImmunologyAichi Cancer Center Research InstituteNagoyaJapan
  2. 2.Department of Pathology and Molecular DiagnosticsAichi Cancer Center Central HospitalNagoyaJapan
  3. 3.Department of Hematology and Cell TherapyAichi Cancer Center Central HospitalNagoyaJapan
  4. 4.Department of HematologyJapanese Red Cross Nagoya First HospitalNagoyaJapan

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