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Related Experiment Videos

[57Co-bleomycin kinetics after local and systemic administration].

J Bier, P Benders, K Bitter

    Deutsche Zahnarztliche Zeitschrift
    |January 1, 1980
    PubMed
    Summary

    Directly injecting 57Co bleomycin into tumors resulted in lower organ exposure and higher tumor concentration compared to intravenous administration in mice. This finding impacts cancer drug delivery strategies.

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    Clinical oral investigations·2018

    Area of Science:

    • Pharmacology
    • Oncology
    • Radiopharmaceuticals

    Context:

    • Bleomycin is an anticancer drug used in chemotherapy.
    • Investigating optimal drug delivery methods is crucial for cancer treatment efficacy and safety.
    • Labeled bleomycin (57Co bleomycin) allows for tracking drug distribution in vivo.

    Purpose:

    • To compare the excretion and organ distribution of labeled bleomycin following intratumoral (i.t.) versus intravenous (i.v.) administration in a mouse tumor model.
    • To assess the impact of administration route on tumor and local lymph node drug concentration.
    • To evaluate the organ and blood load associated with different administration methods.

    Summary:

    • No significant differences in bleomycin excretion were observed between intratumoral and intravenous administration routes.
    • Intravenous administration of 57Co bleomycin led to higher blood and organ load compared to intratumoral injection.
    • Tumor concentration of 57Co bleomycin was significantly higher following intratumoral injection than intravenous administration.

    Impact:

    • Intratumoral injection of labeled bleomycin may offer a more targeted delivery approach, potentially reducing systemic toxicity.
    • Findings suggest that direct tumor injection could be a more effective strategy for maximizing local drug concentration.
    • Further toxicity studies are warranted to confirm the safety profile of intratumoral bleomycin administration.

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