PMID- 16963008 OWN - NLM STAT- MEDLINE DCOM- 20061114 LR - 20111117 IS - 0008-8749 (Print) IS - 0008-8749 (Linking) VI - 241 IP - 1 DP - 2006 May TI - Identification of hepatitis C virus (HCV) 2a-derived epitope peptides having the capacity to induce cytotoxic T lymphocytes in human leukocyte antigen-A24+ and HCV2a-infected patients. PG - 38-46 AB - Since virus-specific cytotoxic T lymphocytes (CTLs) play a critical role in preventing the spread of hepatitis C virus (HCV), vaccine-based HCV-specific CTL induction could be a promising strategy to treat HCV-infected patients. In this study, we tried to identify HCV2a-derived epitopes, which can induce human leukocyte antigen (HLA)-A24-restricted and peptide-specific CTLs. Peripheral blood mononuclear cells of HCV2a-infected patients or healthy donors were stimulated in vitro with HCV2a-derived peptides, which were prepared based on the HLA-A24 binding motif. As a result, three peptides (HCV2a 576-584, HCV2a 627-635, and HCV2a 1085-1094) efficiently induced peptide-specific CTLs from HLA-A24(+) HCV2a-infected patients as well as healthy donors. The cytotoxicity was exhibited by peptide-specific CD8(+) T cells in an HLA-A24-restricted manner. In addition, the HCV2a 627-635 peptide was frequently recognized by immunoglobulin G of HCV2a-infected patients. These results indicate that the identified three HCV2a peptides might be applicable to peptide-based immunotherapy for HLA-A24(+) HCV2a-infected patients. FAU - Wang, Yi AU - Wang Y AD - Cancer Vaccine Development Division, Kurume University Research Center for Innovative Cancer Therapy, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan. FAU - Takao, Yukari AU - Takao Y FAU - Harada, Mamoru AU - Harada M FAU - Komatsu, Nobukazu AU - Komatsu N FAU - Ono, Takeharu AU - Ono T FAU - Sata, Michio AU - Sata M FAU - Itoh, Kyogo AU - Itoh K FAU - Yamada, Akira AU - Yamada A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060911 PL - Netherlands TA - Cell Immunol JT - Cellular immunology JID - 1246405 RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (HLA-A Antigens) RN - 0 (HLA-A24 Antigen) RN - 0 (Peptide Fragments) SB - IM MH - Cell Line, Tumor MH - Cytotoxicity, Immunologic MH - Epitopes, T-Lymphocyte/*immunology MH - HLA-A Antigens/*biosynthesis/blood MH - HLA-A24 Antigen MH - Hepacivirus/*immunology MH - Hepatitis C, Chronic/immunology/metabolism MH - Humans MH - Lymphocyte Activation/immunology MH - Peptide Fragments/*immunology MH - T-Lymphocyte Subsets/immunology/virology MH - T-Lymphocytes, Cytotoxic/*immunology/*virology EDAT- 2006/09/12 09:00 MHDA- 2006/11/15 09:00 CRDT- 2006/09/12 09:00 PHST- 2006/06/06 00:00 [received] PHST- 2006/07/24 00:00 [revised] PHST- 2006/07/28 00:00 [accepted] PHST- 2006/09/12 09:00 [pubmed] PHST- 2006/11/15 09:00 [medline] PHST- 2006/09/12 09:00 [entrez] AID - S0008-8749(06)00130-4 [pii] AID - 10.1016/j.cellimm.2006.07.009 [doi] PST - ppublish SO - Cell Immunol. 2006 May;241(1):38-46. doi: 10.1016/j.cellimm.2006.07.009. Epub 2006 Sep 11.