We have examined the effect of IL-12-producing cellular vaccines on the cytotoxicity and proliferative potential of CD45+ tumour-infiltrating cells (TIL) in mice carrying syngeneic TC-1 and TC-1/A9 HPV 16-associated tumours after chemotherapy with CBM-4A ifosfamide derivative. The chemotherapy resulted in the decrease of the CD4+ and CD8+ TIL, increase of the Gr-1+/CD11b+ TIL, no changes in the infiltration with CD4+/CD25+ Treg TIL, and decrease of the cytolytic and proliferative potential of the CD45+ TIL. Subsequent immunotherapy with the IL-12-producing, genetically modified TC-1 (TC-1-IL-12) cells increased tumour infiltration with CD8+ and CD4+ cells, decreased the Gr-1+/CD11b+ cells, and increased the cytolytic and proliferative potential of the CD45+ TIL. Taken together, these findings suggest that peritumoral administration of the IL-12-producing cellular vaccine can restore the cytolytic potential and inhibit immunosuppressive TIL-dependent mechanisms in the individuals bearing HPV 16-associated tumours, and explain our previously described tumour-inhibitory effects of the vaccine in mice with minimal residual disease after the tumour chemotherapy.
- MeSH
- CD4-pozitivní T-lymfocyty imunologie MeSH
- CD8-pozitivní T-lymfocyty imunologie MeSH
- cytotoxické testy imunologické MeSH
- experimentální nádory imunologie terapie virologie MeSH
- financování organizované MeSH
- genetická terapie MeSH
- ifosfamid analogy a deriváty terapeutické užití MeSH
- imunoenzymatické techniky MeSH
- imunoterapie MeSH
- infekce papilomavirem imunologie terapie virologie MeSH
- inhibitory angiogeneze terapeutické užití MeSH
- interleukin-12 fyziologie MeSH
- lidé MeSH
- lidský papilomavirus 16 patogenita MeSH
- myši inbrední C57BL MeSH
- myši MeSH
- nádorové buňky kultivované MeSH
- proliferace buněk MeSH
- průtoková cytometrie MeSH
- tumor infiltrující lymfocyty imunologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- myši MeSH
- zvířata MeSH
