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Related Experiment Videos

Both hydroxy- and methoxyindoles modify basal temperature in the rat.

D J Morton

    Journal of Pineal Research
    |January 1, 1987
    PubMed
    Summary

    Pineal gland metabolites like hydroxytryptophan can lower body temperature in rats. These findings suggest indolic compounds play a role in thermoregulation, potentially involving central and peripheral actions.

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    Area of Science:

    • Neuroendocrinology
    • Physiology

    Background:

    • The pineal gland produces indoleamine metabolites.
    • Thermoregulation is a critical physiological process influenced by various factors.

    Purpose of the Study:

    • To investigate the effect of pineal gland tryptophan metabolites on body temperature in male rats.
    • To explore the potential role of these metabolites in thermoregulation.

    Main Methods:

    • Administration of various pineal gland tryptophan metabolites to male rats via intraperitoneal injection (100 micrograms/kg).
    • Monitoring of rectal temperatures to assess hypothermic effects.

    Main Results:

    • Hydroxytryptophan, N-acetylserotonin, hydroxytryptophol, and their methoxyindole counterparts induced significant hypothermia.
    • Evidence suggests multiple indolic products contribute to thermoregulation.

    Conclusions:

    • Pineal gland indoleamine metabolites are implicated in the regulation of body temperature.
    • The mechanism may involve central and/or peripheral actions and potentially interact with the pituitary-thyroid and adrenal axes.
    • The pineal gland may integrate environmental signals for fine-tuning thermoregulation.

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