title: Evaluation of anti-tumor effects of tumor cell lysate enriched by HSP-70 against fibrosarcoma tumor in BALB/c mice.
abstract: The cytosolic members of the heat shock protein 70 (HSP-70) family have been shown to elicit protective cell mediated immunity in animal tumor models. The aim of this study was to investigate the effect of the HSP-70 enriched lysate of heated tumor cells as vaccines in cancer immunotherapy in the mouse model for WEHI-164 fibrosarcoma. Three animal bearing tumor groups were investigated: test group; vaccinated with enriched HSP-70 tumor lysate, control group I; vaccinated with tumor lysate only and control group II; received PBS. The results indicated that vaccinated mice in the test group had resulted in a significant reduction in tumor size and longer survival. To find the mechanism of these results, we measured the splenocytes proliferation, tumor infiltrated lymphocytes and cytotoxic activity of the splenocytes. The results indicated a significant increase in the proliferation of mouse splenocytes, a significant increase in the CD8+ lymphocytes as well as significant increase in the cytotoxic activity of splenocytes against the target cells in the test group. In addition, we analyzed the shifting of Th1/Th2 in all the groups. The results indicated a significant increase in the IFN-gamma production in the test group. These findings provided a useful therapeutic model for development of approaches to cancer treatments.
authors.affiliation: Department of Immunology, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
authors.forename: Seyed Mahmoud
authors.initials: SM
authors.lastname: Hashemi
authors.forename: Zuhair M
authors.initials: ZM
authors.lastname: Hassan
authors.forename: Sara
authors.initials: S
authors.lastname: Soudi
authors.forename: Tooba
authors.initials: T
authors.lastname: Ghazanfari
authors.forename: Maryam
authors.initials: M
authors.lastname: Kheirandish
authors.forename: Shahram
authors.initials: S
authors.lastname: Shahabi
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000276:immunology / Q000494:pharmacology*; D018414:CD8-Positive T-Lymphocytes / Q000187:drug effects / Q000276:immunology; D019496:Cancer Vaccines / Q000276:immunology / Q000494:pharmacology*; D002457:Cell Extracts / Q000276:immunology / Q000494:pharmacology*; D005260:Female; D005354:Fibrosarcoma / Q000188:drug therapy* / Q000276:immunology / Q000473:pathology*; D018840:HSP70 Heat-Shock Proteins / Q000276:immunology / Q000494:pharmacology*; D016233:Immunotherapy, Active; D016219:Immunotherapy, Adoptive; D007279:Injections, Subcutaneous; D007371:Interferon-gamma / Q000096:biosynthesis; D016246:Lymphocytes, Tumor-Infiltrating / Q000187:drug effects / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D013154:Spleen / Q000276:immunology; D015996:Survival Rate; D016176:T-Lymphocyte Subsets / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D016896:Treatment Outcome; D047368:Tumor Burden / Q000187:drug effects / Q000276:immunology; D014407:Tumor Cells, Cultured / Q000737:chemistry / Q000276:immunology
chemical_list: D000970:Antineoplastic Agents; D019496:Cancer Vaccines; D002457:Cell Extracts; D018840:HSP70 Heat-Shock Proteins; D007371:Interferon-gamma