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Related Experiment Videos

Offsetting toxicity of antineoplastic agents.

E S Cook, L G Nutini, J C Fardon

    Journal of Surgical Oncology
    |January 1, 1975
    PubMed
    Summary

    Yeast extract PCO partially reverses chemotherapy"s bone marrow toxicity but boosts its anti-cancer effects on tumors. PCO enhances methotrexate"s efficacy against leukemia in vivo.

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    Area of Science:

    • Oncology
    • Pharmacology
    • Cell Biology

    Background:

    • Methotrexate and fluorouracil are antimitotic chemotherapy drugs.
    • Bone marrow cells and ascites Krebs-2 carcinoma are common models for studying drug effects.
    • Yeast extracts are being explored for their potential biological activities.

    Purpose of the Study:

    • To investigate the effect of PCO, a yeast extract, on the antimitotic activity of methotrexate and fluorouracil.
    • To determine if PCO modifies the toxicity of these drugs on bone marrow cells.
    • To evaluate the in vivo efficacy of PCO in combination with chemotherapy.

    Main Methods:

    • In vitro studies using bone marrow cells and ascites Krebs-2 carcinoma.
    • In vivo studies using L-1210 lymphoid leukemia and ascites Krebs-2 tumor models.
    • Administration of PCO in conjunction with methotrexate and fluorouracil.

    Main Results:

    • PCO partially offsetted the mitotic inhibitory effects of methotrexate and fluorouracil on bone marrow cells in vitro.
    • PCO increased the antimitotic activity of these drugs against ascites Krebs-2 carcinoma in vitro.
    • In vivo, PCO enhanced methotrexate's action against L-1210 lymphoid leukemia.
    • PCO did not interfere with fluorouracil's effectiveness against ascites Krebs-2 tumor in vivo.

    Conclusions:

    • PCO demonstrates a differential effect on chemotherapy, reducing bone marrow toxicity while enhancing anti-tumor activity.
    • PCO shows potential as an adjunct therapy to improve the therapeutic index of methotrexate and fluorouracil.
    • Further research is warranted to explore the mechanisms underlying PCO's effects and its clinical applicability.

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