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Related Experiment Videos

Maturational age affects pirenperone dose-response pattern.

C Goodrich, M Dillehay

    General Pharmacology
    |January 1, 1987
    PubMed
    Summary
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    The serotonin 5-HT2 antagonist pirenperone reduced preferred temperatures in young mice. Higher doses were needed to observe this effect in older mice, suggesting age-related changes in drug response.

    Area of Science:

    • Neuropharmacology
    • Developmental Biology
    • Thermoregulation

    Background:

    • Serotonin 5-HT2 receptors play a role in regulating body temperature.
    • Pirenperone is a selective antagonist of serotonin 5-HT2 receptors.
    • Understanding age-dependent drug effects is crucial for pediatric pharmacology.

    Purpose of the Study:

    • To investigate the effects of pirenperone on temperature preference in mice of different ages.
    • To determine the dose-response relationship of pirenperone's effect on thermoregulation across early developmental stages.

    Main Methods:

    • Pirenperone was administered to mice aged 3, 5, and 7 days.
    • Three doses (0.16, 0.48, and 1.6 mg/kg) were tested.
    • Temperature preference was measured 1 hour after injection.

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    Main Results:

    • All tested doses significantly decreased preferred temperature in 3-day-old mice.
    • Only the highest dose (1.6 mg/kg) significantly affected temperature preference in 5- and 7-day-old mice.
    • A shift in the dose-response curve with increasing age was observed.

    Conclusions:

    • Pirenperone's effect on temperature preference is age-dependent in young mice.
    • The sensitivity to pirenperone decreases with age during the early postnatal period.
    • Developmental changes in serotonin receptor systems may underlie these observed age-related differences.