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Related Experiment Videos

Carcinogenicity testing in nude mouse cell cultures.

A M Laaksonen, R A Mäntyjärvi, O O Hänninen

    Archives of Toxicology. Supplement. = Archiv Fur Toxikologie. Supplement
    |January 1, 1986
    PubMed
    Summary

    3-methylcholanthrene (MC) significantly enhanced Simian virus 40 (SV40) transformation of mouse fibroblasts, increasing tumor formation. Anthracene, a non-carcinogen, showed no effect, highlighting MC

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    Area of Science:

    • Oncology
    • Virology
    • Cell Biology

    Background:

    • Chemical carcinogens and viral agents are known to induce cellular transformation.
    • Investigating the synergistic effects of carcinogens and viruses is crucial for understanding carcinogenesis.

    Purpose of the Study:

    • To evaluate the combined effect of 3-methylcholanthrene (MC) and Simian virus 40 (SV40) on the transformation of mouse skin fibroblasts.
    • To assess the impact of MC post-treatment duration on viral transformation frequency.
    • To compare the tumorigenicity of cells transformed by SV40 alone versus combined SV40 and MC treatment.

    Main Methods:

    • Secondary cultures of newborn NMRI nu/nu (nude) mouse skin fibroblasts were used.
    • Cells were exposed to SV40 and subsequently treated with MC for 72 hours.
    • Viral transformation frequency and tumorigenicity of resulting cell lines were evaluated.

    Main Results:

    • Long-term (72 h) post-treatment with MC increased SV40-induced transformation by up to 4.3-fold.
    • Anthracene, a non-carcinogenic compound, did not affect viral transformation frequency.
    • Cell lines transformed by the combined SV40 and MC treatment exhibited higher tumorigenicity compared to those transformed by SV40 alone.

    Conclusions:

    • 3-methylcholanthrene acts as a potent promoter of SV40-induced cell transformation in mouse fibroblasts.
    • The observed increase in transformation and tumorigenicity suggests a synergistic interaction between MC and SV40.
    • These findings contribute to understanding the mechanisms of chemical-carcinogen-enhanced viral oncogenesis.

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