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Carcinogenicity of dimethoate.

M D Reuber

    Environmental Research
    |August 1, 1984
    PubMed
    Summary

    Dimethoate, an insecticide, is highly carcinogenic in animal studies. Research shows it significantly increases cancer risk, including leukemia and various malignant neoplasms in rats and mice.

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    Area of Science:

    • Toxicology
    • Carcinogenesis
    • Animal Models

    Background:

    • Insecticide safety evaluations are crucial for public health.
    • Understanding the long-term effects of pesticide exposure is essential.
    • Previous studies on dimethoate's carcinogenicity warranted further review.

    Purpose of the Study:

    • To review and synthesize findings on the carcinogenicity of the insecticide dimethoate in animal models.
    • To identify specific types and locations of neoplasms induced by dimethoate exposure.

    Main Methods:

    • Review of histological sections from animal studies.
    • Analysis of data from the National Cancer Institute study on dimethoate.
    • Examination of carcinogenicity in Osborne-Mendel rats, Wistar rats, and AB mice.

    Main Results:

    • Dimethoate demonstrated high carcinogenicity in Osborne-Mendel rats, increasing neoplasms at all sites.
    • Increased malignant neoplasms (carcinomas, sarcomas) and endocrine organ tumors (adrenal, thyroid, pituitary) were observed in rats.
    • Dimethoate exposure led to increased liver and reproductive organ neoplasms in rats, and monocytic or granulocytic leukemia in both rats and mice.
    • Toxic effects in male rats included testicular atrophy, renal disease, parathyroid hyperplasia, and polyarteritis.

    Conclusions:

    • Dimethoate is a potent carcinogen in rodents, inducing a range of malignant neoplasms and leukemia.
    • The findings highlight significant toxicological risks associated with dimethoate exposure.
    • Further research into the mechanisms of dimethoate-induced carcinogenesis and its implications for human health is warranted.

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