PMID- 17686178 OWN - NLM STAT- MEDLINE DCOM- 20081208 LR - 20181113 IS - 1479-5876 (Electronic) IS - 1479-5876 (Linking) VI - 5 DP - 2007 Aug 8 TI - Semi-allogeneic vaccine for T-cell lymphoma. PG - 39 AB - BACKGROUND: Experimental results from studies with inbred mice and their syngeneic tumors indicated that the inoculation of semi-allogeneic cell hybrids (derived from the fusion between syngeneic tumor cells and an allogeneic cell line) protects the animal host from a subsequent lethal challenge with unmodified syngeneic tumor cells. METHODS: Semi-allogeneic somatic cell hybrids were generated by the fusion of EL-4 T lymphoma cells (H-2b) and BALB/c-derived renal adenocarcinoma RAG cells (H-2d). Cell hybrids were injected intra-peritoneally (i.p.) in C57BL/6 mice (H-2b) before challenging the mice with a tumorigenic dose of EL-4 cells. RESULTS: Semi-allogeneic tumor cell hybrids could not form a tumor in the animal host because they expressed allogeneic determinants (H-2d) and were rejected as a transplant. However, they conferred protection against a tumorigenic challenge of EL-4 cells compared to control mice that were mock-vaccinated with i.p.-injected phosphate-buffered saline (PBS) and in which EL-4 lymphomas grew rapidly to a large size in the peritoneal cavity. Screening of spleen-derived RNA by means of focused microarray technology revealed up-regulation of genes involved in the Th-1-type immune response and in the activation of dendritic antigen-presenting cells (APC). CONCLUSION: The results of our studies are entirely consistent with the concept that CD80- and CD86-expressing APC play a central role in mediating the immune protection induced by semi-allogeneic vaccines by activating a Th-1 response and instructing T cells responsible for killing autologous tumor cells. FAU - Yu, Jin AU - Yu J AD - Department of Radiation Oncology, Medical University of South Carolina, Charleston, SC, USA. yujin@musc.edu FAU - Kindy, Mark S AU - Kindy MS FAU - Gattoni-Celli, Sebastiano AU - Gattoni-Celli S LA - eng PT - Journal Article DEP - 20070808 PL - England TA - J Transl Med JT - Journal of translational medicine JID - 101190741 RN - 0 (Cancer Vaccines) RN - TDQ283MPCW (Eosine Yellowish-(YS)) RN - YKM8PY2Z55 (Hematoxylin) SB - IM MH - Animals MH - Cancer Vaccines/*immunology MH - Cell Line, Tumor MH - Dendritic Cells/immunology MH - Eosine Yellowish-(YS) MH - Gene Expression Regulation, Neoplastic MH - Genes, Neoplasm MH - Hematoxylin MH - Lymphoma, T-Cell/genetics/*immunology/*prevention & control MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Oligonucleotide Array Sequence Analysis MH - Spleen/immunology PMC - PMC1971246 EDAT- 2007/08/10 09:00 MHDA- 2008/12/17 09:00 PMCR- 2007/08/08 CRDT- 2007/08/10 09:00 PHST- 2007/05/29 00:00 [received] PHST- 2007/08/08 00:00 [accepted] PHST- 2007/08/10 09:00 [pubmed] PHST- 2008/12/17 09:00 [medline] PHST- 2007/08/10 09:00 [entrez] PHST- 2007/08/08 00:00 [pmc-release] AID - 1479-5876-5-39 [pii] AID - 10.1186/1479-5876-5-39 [doi] PST - epublish SO - J Transl Med. 2007 Aug 8;5:39. doi: 10.1186/1479-5876-5-39.