4.4 Review

Establishing the applicability of cancer vaccines in combination with chemotherapeutic entities: current aspect and achievable prospects

Journal

MEDICAL ONCOLOGY
Volume 40, Issue 5, Pages -

Publisher

HUMANA PRESS INC
DOI: 10.1007/s12032-023-02003-y

Keywords

Cancer; Chemotherapy; Immunotherapy; Cancer vaccine; Combination therapy

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Cancer immunotherapy, particularly cancer vaccine therapy, holds promise in improving outcomes in cancer treatment. However, individually they may not result in substantial tumor eradication. Combination of cancer vaccines with chemotherapeutic agents has shown potential in intensifying anti-tumor activities by stimulating the immune response. This review summarizes the mechanisms of cancer vaccines, their interactions with chemotherapy, and future directions.
Cancer immunotherapy is one of the recently developed cancer treatment modalities. When compared with conventional anticancer drug regimens, immunotherapy has shown significantly better outcomes in terms of quality of life and overall survival. It incorporates a wide range of immunomodulatory modalities that channel the effects of the immune system either by broadly modulating the host immune system or by accurately targeting distinct tumor antigens. One such treatment modality that has gained interest is cancer vaccine therapy which acts by developing antibodies against tumor cells. Cancer vaccines target individual peptides or groups of antigens that are released by tumor cells and presented by the APCs. This also initiates an effective process to activate the host immune responses. Studies on various types of cancer vaccines are conducted, out of which only few are approved by FDA for clinical uses. Despite of documented safety and efficacy of conventional chemotherapy and cancer vaccines, individually they did not produce substantial results in eradication of the cancer as a monotherapy. Hence, the combination approach holds the extensive potential to provide significant improvement in disease outcomes. Certain chemotherapy has immunomodulatory effects and is proven to synergize with cancer vaccines thereby enhancing their anti-tumor activities. Chemotherapeutic agents are known to have immunostimulatory mechanisms apart from its cytotoxic effect and intensify the anti-tumor activities of vaccines by various mechanisms. This review highlights various cancer vaccines, their mechanism, and how their activity gets affected by chemotherapeutic agents. It also aims at summarizing the evidence-based outcome of the combination approach of a cancer vaccine with chemotherapy and a brief on future aspects.

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