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Related Experiment Videos

Cellular changes in rat urinary bladder carcinomas induced by FANFT: a quantitative electron microscopic analysis.

B U Pauli, S M Cohen, R S Weinstein

    The Journal of Urology
    |March 1, 1983
    PubMed
    Summary

    Quantitative morphometric analysis of rat bladder tumors reveals significant cellular and organelle changes during carcinogenesis. These changes correlate with tumor progression and invasiveness, offering insights into neoplastic transformation.

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    Area of Science:

    • Urothelial biology
    • Carcinogenesis research
    • Quantitative pathology

    Background:

    • The Fischer rat N-(4-hydroxybutyl)-N-nitrosobutylamine (FANFT) model is used to study urinary bladder cancer.
    • Understanding the morphometric changes during carcinogenesis is crucial for identifying biomarkers of tumor progression.

    Purpose of the Study:

    • To quantitatively analyze the morphometric alterations in rat urinary bladder epithelium during FANFT-induced carcinogenesis.
    • To correlate these quantitative changes with tumor differentiation and biological behavior.

    Main Methods:

    • Collection of morphometric data from normal and neoplastic urinary bladder epithelia in Fischer rats.
    • Sequential measurements of organelle and cellular compartment volumes, surface areas, and numerical densities.

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  • Utilized standard point and intersection counting methods for quantitative analysis.

    • Main Results:

    • Neoplastic transformation and tumor progression are associated with increased volume densities of cells, nuclei, microvilli, rough endoplasmic reticulum, and mitochondria.
    • Decreased volume densities were observed in cytoplasmic matrix, fusiform vesicles, Golgi complex, and lysosomes.
    • Nuclear/cytoplasmic ratio increased with tumor invasiveness, from 1:4 in normal urothelium to 1:2 in invasive tumors.

    Conclusions:

    • Quantitative morphometric data provide valuable insights into the cellular and ultrastructural changes during urinary bladder carcinogenesis.
    • The observed changes correlate with tumor differentiation and biological behavior, aiding in the understanding of cancer progression.
    • Smooth endoplasmic reticulum proliferation may indicate a role in carcinogen detoxification.