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Related Experiment Videos

Testosterone and tolerance in rat vas deferens.

H F Miranda, W W Wolstenholme

    General Pharmacology
    |January 1, 1984
    PubMed
    Summary

    Testosterone and protein synthesis inhibitors, cycloheximide and actinomycin D, prevent tolerance development in rat vas deferens smooth muscle. These inhibitors do not affect normal muscle responses to norepinephrine.

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    Area of Science:

    • Pharmacology
    • Molecular Biology
    • Physiology

    Background:

    • Tolerance to drugs can develop in smooth muscle tissues.
    • Protein synthesis is implicated in cellular adaptation processes.

    Purpose of the Study:

    • To investigate the role of testosterone and protein synthesis in the development of tolerance in rat vas deferens smooth muscle.
    • To determine if protein synthesis inhibitors affect normal physiological responses.

    Main Methods:

    • Treatment of rat vas deferens smooth muscle with testosterone, cycloheximide, and actinomycin D.
    • Assessment of tolerance development to morphine and ethanol.
    • Evaluation of physiological responses to norepinephrine.

    Main Results:

    • Testosterone inhibited the development of tolerance in rat vas deferens smooth muscle.
    • Cycloheximide and actinomycin D also inhibited tolerance development.
    • The inhibitory effects were not due to toxic side effects of the inhibitors.
    • Physiological responses to norepinephrine remained unaltered.

    Conclusions:

    • Testosterone plays a role in preventing smooth muscle tolerance.
    • Protein synthesis is crucial for the development of tolerance in this tissue.
    • Cycloheximide and actinomycin D are effective tools for studying tolerance mechanisms without affecting normal function.

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