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Carcinogenicity testing of antitumor agents.

G H Hottendorf

    Toxicologic Pathology
    |January 1, 1985
    PubMed
    Summary

    Animal studies often fail to predict human cancer risks from antitumor agents. Assessing DNA interaction and mutagenicity is more reliable for identifying carcinogenic potential and informing risk assessment.

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    Area of Science:

    • Oncology
    • Toxicology
    • Pharmacology

    Background:

    • Antitumor agents are investigated for carcinogenicity due to their inherent risks.
    • Animal bioassays are used to predict oncogenesis and identify target organs in humans.
    • Existing literature shows animal models confirm carcinogenicity of many antitumor agents and case reports link them to human tumors.

    Purpose of the Study:

    • To evaluate the utility of animal carcinogenicity testing for antitumor agents.
    • To propose a more effective approach for assessing the carcinogenic risk of these agents.
    • To highlight the limitations of animal models in predicting human oncogenesis.

    Main Methods:

    • Literature review of carcinogenicity testing of antitumor agents in animal bioassays.
    • Analysis of case reports linking antitumor agents to human tumors.
    • Evaluation of the predictive value of animal studies for human tumor sites.

    Main Results:

    • Animal studies confirm carcinogenicity of many antitumor agents.
    • Numerous case reports associate these agents with human tumors.
    • Animal studies demonstrate an inability to accurately predict human tumor sites.

    Conclusions:

    • Carcinogenic risk assessment should prioritize DNA interaction, mutagenicity, and teratogenicity testing.
    • DNA-reactive, mutagenic/teratogenic antitumor agents should be presumed carcinogenic without long-term animal bioassays.
    • The limitations of animal studies in predicting human tumor sites must be acknowledged.

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