PMID- 17409267 OWN - NLM STAT- MEDLINE DCOM- 20070921 LR - 20210206 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 110 IP - 3 DP - 2007 Aug 1 TI - Alternative splicing due to an intronic SNP in HMSD generates a novel minor histocompatibility antigen. PG - 1055-63 AB - Here we report the identification of a novel human leukocyte antigen (HLA)-B44-restricted minor histocompatibility antigen (mHA) with expression limited to hematopoietic cells. cDNA expression cloning studies demonstrated that the cytotoxic T lymphocyte (CTL) epitope of interest was encoded by a novel allelic splice variant of HMSD, hereafter designated as HMSD-v. The immunogenicity of the epitope was generated by differential protein expression due to alternative splicing, which was completely controlled by 1 intronic single-nucleotide polymorphism located in the consensus 5' splice site adjacent to an exon. Both HMSD-v and HMSD transcripts were selectively expressed at higher levels in mature dendritic cells and primary leukemia cells, especially those of myeloid lineage. Engraftment of mHA(+) myeloid leukemia stem cells in nonobese diabetic/severe combined immunodeficient (NOD/SCID)/gammac(null) mice was completely inhibited by in vitro preincubation with the mHA-specific CTL clone, suggesting that this mHA is expressed on leukemic stem cells. The patient from whom the CTL clone was isolated demonstrated a significant increase of the mHA-specific T cells in posttransplantation peripheral blood, whereas mHA-specific T cells were undetectable in pretransplantation peripheral blood and in peripheral blood from his donor. These findings suggest that the HMSD-v-encoded mHA (designated ACC-6) could serve as a target antigen for immunotherapy against hematologic malignancies. FAU - Kawase, Takakazu AU - Kawase T AD - Division of Immunology, Aichi Cancer Center Research Institute, 1-1 Kanokoden, Chikusa-ku, Nagoya 464-8681, Japan. FAU - Akatsuka, Yoshiki AU - Akatsuka Y FAU - Torikai, Hiroki AU - Torikai H FAU - Morishima, Satoko AU - Morishima S FAU - Oka, Akira AU - Oka A FAU - Tsujimura, Akane AU - Tsujimura A FAU - Miyazaki, Mikinori AU - Miyazaki M FAU - Tsujimura, Kunio AU - Tsujimura K FAU - Miyamura, Koichi AU - Miyamura K FAU - Ogawa, Seishi AU - Ogawa S FAU - Inoko, Hidetoshi AU - Inoko H FAU - Morishima, Yasuo AU - Morishima Y FAU - Kodera, Yoshihisa AU - Kodera Y FAU - Kuzushima, Kiyotaka AU - Kuzushima K FAU - Takahashi, Toshitada AU - Takahashi T LA - eng PT - Clinical Trial PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070404 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (DNA, Complementary) RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (HLA-B Antigens) RN - 0 (HLA-B44 Antigen) RN - 0 (Minor Histocompatibility Antigens) RN - 0 (RNA Splice Sites) SB - IM MH - Alternative Splicing/*genetics/immunology MH - Animals MH - Cell Line, Tumor MH - DNA, Complementary/genetics/immunology MH - Epitopes, T-Lymphocyte/*genetics/immunology MH - HLA-B Antigens/genetics/immunology MH - HLA-B44 Antigen MH - Humans MH - Immunotherapy MH - Leukemia, Myeloid/*genetics/immunology/therapy MH - Mice MH - Mice, Inbred NOD MH - Mice, SCID MH - Minor Histocompatibility Antigens/*genetics/immunology MH - Neoplastic Stem Cells MH - *Polymorphism, Single Nucleotide MH - RNA Splice Sites MH - T-Lymphocytes, Cytotoxic/immunology EDAT- 2007/04/06 09:00 MHDA- 2007/09/22 09:00 CRDT- 2007/04/06 09:00 PHST- 2007/04/06 09:00 [pubmed] PHST- 2007/09/22 09:00 [medline] PHST- 2007/04/06 09:00 [entrez] AID - S0006-4971(20)49564-3 [pii] AID - 10.1182/blood-2007-02-075911 [doi] PST - ppublish SO - Blood. 2007 Aug 1;110(3):1055-63. doi: 10.1182/blood-2007-02-075911. Epub 2007 Apr 4.