Abstract
Background
New therapies for melanoma have yielded promising results, but their application is limited because of serious side-effects and only moderate impact on patient survival. Vaccine therapies may offer some hope by targeting tumor-specific responses, considering the immunogenic nature of melanomas.
Objectives
To investigate the safety profile and efficiency of a xenogeneic cell-based vaccine therapy in stage III melanoma patients and evaluate the survival rate in treated patients.
Materials and Methods
Twenty-seven stage III melanoma patients were immunized with a lyophilized xenogeneic polyantigenic vaccine (XPV) prepared from murine melanoma B16 and carcinoma LLC cells.
Results
Neither grade III/IV toxicities, nor clinically significant changes in blood and biochemical parameters were noted after an induction course of 10 XPV subcutaneous immunizations. No laboratory or clinical signs of systemic autoimmunity were documented. Following 10 vaccinations, a relative increase in the numbers of circulating memory CD4+CD45RO+ T cells (but not CD8+ CD45RO+ T cells)was observed. Peripheral blood mononuclear cells obtained from XPV-treated patients demonstrated increased proliferative responses to human BRO melanoma-associated antigens and marked increases in serum levels of IFN and IL-8. Serum levels of TNF-, IL-4 and IL-6 were not affected. The overall five-year survival rate in the treated patients was significantly higher than that in 27 control patients with matched clinical and prognostic characteristics (55% vs 18%).
Conclusion
XPV-based immunotherapy could be maximally effective when started as early as possible before or after surgical excision of the primary tumor and local metastases, i.e. when tumor-mediated suppressive effects on immunity are minimal.
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Abbreviations
- Ab:
-
antibody
- IFN:
-
interferon
- IL:
-
interleukin
- M:
-
mean
- PBMC:
-
peripheral blood mononuclear cell
- SEM:
-
standard error of the mean
- SI:
-
stimulation index
- TAA:
-
tumor-associated antigen
- TNF:
-
tumor necrosis factor
- XPV:
-
xenogeneic polyantigenic vaccine
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Seledtsova, G.V., Shishkov, A.A., Kaschenko, E.A. et al. Xenogeneic cell-based vaccine therapy for stage III melanoma: safety, immune-mediated responses and survival benefits. Eur J Dermatol 26, 138–143 (2016). https://doi.org/10.1684/ejd.2016.2733
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DOI: https://doi.org/10.1684/ejd.2016.2733