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Related Experiment Videos

A clinically relevant canine lung cancer model.

J R Benfield, E C Shors, W G Hammond

    The Annals of Thoracic Surgery
    |December 1, 1981
    PubMed
    Summary

    Developing a canine lung cancer model, this study details reproducible carcinogenesis using chemical carcinogens. Early hyperplastic changes progress to invasive cancers, establishing a predictable model for lung cancer research.

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    What surgeons can/can't do.

    Bulletin of the American College of Surgeons·2007

    Area of Science:

    • Comparative oncology
    • Chemical carcinogenesis

    Background:

    • Studying early human lung cancer is challenging.
    • A reliable animal model is needed to understand lung cancer development.

    Purpose of the Study:

    • To establish a canine model for studying early lung cancer.
    • To investigate the pathogenesis and timeline of chemically induced lung cancer in dogs.

    Main Methods:

    • Administered various chemical carcinogens (benzo[a]pyrene, nitrosomethylurea, etc.) via endobronchial injections, topical applications, and sustained-release implants.
    • Utilized isolated tracheal segments as cervical pedicle grafts.
    • Monitored gross and histological changes over time.

    Main Results:

    • Reproducible gross and histological evolution of lung lesions was observed.

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  • Early changes included hyperplasia and metaplasia, followed by atypia within 6-18 weeks.
  • Invasive cancers developed within 8-65 months in treated lungs, with varying success rates depending on the regimen.

    • Conclusions:

    • A canine model for focal lung carcinogenesis with a well-defined pathogenesis and extended preneoplastic period has been established.
    • This model allows for predictable cancer development at specific sites.
    • The model is suitable for investigating early lung cancer development and potential interventions.