title: Anti-tumor effects of fusion vaccine prepared by renal cell carcinoma 786-O cell line and peripheral blood dendritic cells of healthy volunteers in vitro and in human immune reconstituted SCID mice.
abstract: Dendritic cells (DC), as professional antigen presenting cells, play the central role in the process of body initiating the anti-tumor immunity, and the study on DC anti-tumor vaccine has become heated in recent years. In this study, we used polyethylene glycol (PEG) to induce renal cell carcinoma (RCC) 786-O cell line fused with peripheral blood DC of healthy volunteers, and discuss the biological characteristics of fusion vaccine and its anti-tumor effects in vitro and in human immune reconstituted SCID mice model of RCC. The study found that PEG could effectively induce cell fusion, and the expressions of CD86 and HLA-DR in fusion vaccine group were significantly up-regulated compared with the DC control group; the secretion of IL-12 was much higher and longer than that of the control; the functions of dendritic cell-tumor fusion vaccine to stimulate the proliferation of allogenic T lymphocytes and to kill RCC786-O cells in vitro were significantly higher than those of the control group, and after the killing, apoptosis body was observed in the target cells; after the injection of fusion vaccine into human immune reconstituted SCID mice model of RCC786-O via vena caudalis, the volume of mice tumor was reduced significantly, proliferation index of tumor cells decreased obviously compared with that of the control group, and more hemorrhage and putrescence focuses presented, accompanying large quantity of lymphocytes soakage. The results of this experimental study shows that fusion vaccine of RCC786-O cell line and DC can significantly stimulate the proliferation of allogenic T cells and specifically inhibit and kill RCC cells in vitro and in vivo, which makes the DC-RCC786-O fusion vaccine a possible new way of effective RCC immunotherapy.
authors.affiliation: Department of Urological Surgery, The Second Affiliated Hospital, Chongqing Medical University, Yuzhong District, Chongqing, PRC 400010, China. huzili6767@163.com
authors.forename: Zhi
authors.initials: Z
authors.lastname: Hu
authors.forename: Shihui
authors.initials: S
authors.lastname: Liu
authors.forename: Xuancheng
authors.initials: X
authors.lastname: Mai
authors.forename: Zili
authors.initials: Z
authors.lastname: Hu
authors.forename: Chuan
authors.initials: C
authors.lastname: Liu
mesh_terms: D000818:Animals; D019496:Cancer Vaccines / Q000276:immunology*; D002292:Carcinoma, Renal Cell / Q000276:immunology* / Q000473:pathology / Q000503:physiopathology; D002453:Cell Cycle / Q000502:physiology; D002459:Cell Fusion; D045744:Cell Line, Tumor / Q000187:drug effects; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects / Q000276:immunology*; D005260:Female; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D018664:Interleukin-12 / Q000276:immunology; D008297:Male; D051379:Mice; D016513:Mice, SCID; D009368:Neoplasm Transplantation / Q000276:immunology / Q000473:pathology; D011092:Polyethylene Glycols / Q000494:pharmacology; D011897:Random Allocation
chemical_list: D019496:Cancer Vaccines; D006680:HLA Antigens; D018664:Interleukin-12; D011092:Polyethylene Glycols