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Related Experiment Videos

Cell kinetics, cell structure, and radiotherapy

A Goldfeder

    Annals of the New York Academy of Sciences
    |December 10, 1982
    PubMed
    Summary

    This study characterized five experimental tumors, analyzing their cell cycle kinetics and response to combined radiotherapy. Microwave hyperthermia alone achieved total tumor regression, highlighting its therapeutic potential.

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    Response of an experimental mammary carcinoma to fractionated X-irradiation with misonidazole and microwave hyperthermia.

    International journal of radiation oncology, biology, physics·1984

    Area of Science:

    • Oncology
    • Experimental Pathology
    • Radiotherapy

    Background:

    • Five experimental tumors (3 mammary carcinomas, 1 sarcoma, 1 lymphoma) were utilized in isogeneic mouse hosts.
    • Tumor growth curves, cell cycle parameters (TG1, TG2, TS, Tc), and volume-doubling time (VDT) were analyzed.
    • Histological, ultrastructural, and kinetic parameters were evaluated to understand tumor heterogeneity.

    Purpose of the Study:

    • To characterize the cell cycle kinetics and morphology of five distinct experimental tumors.
    • To investigate the efficacy of combined radiotherapy using X-rays, misonidazole, and microwave hyperthermia.
    • To assess the individual and combined effects of these agents on tumor regression.

    Main Methods:

    • Tumor maintenance via serial subcutaneous transplants in isogeneic mice.
    • Analysis of growth curves, percent labeled mitoses, and cell cycle parameters.
    • Histological and electron microscopy for morphological assessment.
    • Evaluation of response to combined radiotherapy (X-rays, misonidazole, microwave hyperthermia).

    Main Results:

    • Significant variations in kinetic parameters and autoradiographic exposure times were observed among tumor types.
    • Combined radiotherapy (X-rays, misonidazole, hyperthermia) showed an enhancement factor of 3.9 compared to X-rays alone.
    • Microwave hyperthermia alone induced total tumor regression, with varying treatment times required per tumor type.

    Conclusions:

    • Tumor heterogeneity influences kinetic parameters and response to therapy.
    • Combined modality treatment significantly enhances radiotherapy efficacy.
    • Microwave hyperthermia demonstrates potent tumor-ablative capabilities, suggesting its value in cancer treatment strategies.

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