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[Experimental study on local immunochemotherapy].

M Kasuga, M Sakita, T Yamane

    Gan to Kagaku Ryoho. Cancer & Chemotherapy
    |December 1, 1982
    PubMed
    Summary
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    Intratumor chemoimmunotherapy combining Mitomycin C (MMC) and BCG significantly improved complete cure rates and inhibited metastasis in a mouse model. This approach also enhanced tumor-specific immunity, leading to greater resistance against tumor rechallenge.

    Area of Science:

    • Oncology
    • Immunology
    • Pharmacology

    Context:

    • Hepatoma 134 (MH 134) mouse ascites model used.
    • Inbred male C3H/He mice served as the host-tumor system.
    • Mitomycin C (MMC) and Bacillus Calmette-Guerin (BCG) were selected as chemotherapeutic and immunopotentiating agents, respectively.

    Purpose:

    • To evaluate the efficacy of intratumor chemoimmunotherapy (MMC + BCG) compared to monotherapy (MMC alone or BCG alone) or systemic therapy.
    • To investigate the impact of intratumor therapy on the development of tumor-specific immunity.

    Summary:

    • Intratumor treatment with MMC + BCG resulted in an 85% complete cure rate.
    • This combination therapy markedly inhibited lymph node metastases compared to single-agent treatments.
    • Mice treated with MMC + BCG showed enhanced immunity to tumor rechallenge (79% immune) compared to BCG alone (57% immune).

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  • Intratumoral MMC administration preserved immune responses (PFC and DTH against SRBC) better than intraperitoneal MMC.

    • Impact:

    • Intratumor chemoimmunotherapy demonstrates superior efficacy in treating hepatoma, offering a promising therapeutic strategy.
    • The findings highlight the potential of combining chemotherapy and immunotherapy locally to potentiate anti-tumor immunity.
    • This approach may lead to improved patient outcomes by enhancing tumor eradication and preventing metastasis.