PMID- 9803675 OWN - NLM STAT- MEDLINE DCOM- 19981201 LR - 20191024 IS - 0925-5710 (Print) IS - 0925-5710 (Linking) VI - 68 IP - 2 DP - 1998 Aug TI - Induction of antitumor cytotoxic activity using CD34+ cord blood cell-derived and irradiated tumor cell-primed dendritic cells. PG - 169-82 AB - Dendritic cells (DCs) are the most powerful antigen-presenting cells in the immune system. They can activate immunologically naive T cells and improve the efficacy of immunotherapy against tumors. In the present study we investigated whether CD34+ cord blood cell-derived DCs are capable of inducing antitumor cytotoxic cells, such as cytotoxic T lymphocytes (CTLs), NK cells, and monocytes. Cord blood T cells stimulated by DCs pulsed with irradiated K562 major histocompatibility complex (MHC) class I+ cells were highly effective in eliciting a selective killing response against K562 class I+ cells. This killing activity was almost completely abrogated by antibodies to CD8 or MHC class I, but not to CD4. This suggests that tumor cell-pulsed DCs generated from CD34+ cord blood cells are able to induce tumor specific CTLs against corresponding tumor cells from cord blood T cells, and that these CTLs are CD8+ T cells which may recognize tumor cells via MHC class I molecules. This observation has potentially important implications for the use of DCs in clinical immunotherapy in cord blood transplantation. FAU - Fujii, S AU - Fujii S AD - Second Department of Internal Medicine, Kumamoto University School of Medicine, Japan. FAU - Fujimoto, K AU - Fujimoto K FAU - Osato, M AU - Osato M FAU - Matsui, K AU - Matsui K FAU - Takatsuki, K AU - Takatsuki K FAU - Kawakita, M AU - Kawakita M LA - eng PT - Journal Article PL - Japan TA - Int J Hematol JT - International journal of hematology JID - 9111627 RN - 0 (Antigens, CD34) RN - 0 (Antigens, Neoplasm) RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Antigen Presentation/immunology MH - Antigens, CD34/analysis MH - Antigens, Neoplasm/*immunology MH - CD8-Positive T-Lymphocytes/physiology MH - Cytotoxicity, Immunologic/immunology MH - Dendritic Cells/*immunology/radiation effects MH - Fetal Blood/*cytology MH - Histocompatibility Antigens Class I/analysis MH - Humans MH - Infant, Newborn MH - K562 Cells/immunology MH - Monocytes/immunology MH - T-Lymphocytes/immunology MH - Tumor Cells, Cultured EDAT- 1998/11/06 00:00 MHDA- 1998/11/06 00:01 CRDT- 1998/11/06 00:00 PHST- 1998/11/06 00:00 [pubmed] PHST- 1998/11/06 00:01 [medline] PHST- 1998/11/06 00:00 [entrez] AID - S0925571098000693 [pii] AID - 10.1016/s0925-5710(98)00069-3 [doi] PST - ppublish SO - Int J Hematol. 1998 Aug;68(2):169-82. doi: 10.1016/s0925-5710(98)00069-3.