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Prenatal ethanol exposure in rats alters serotonergic-mediated behavioral and physiological function
Candace E Hofmann1, Wendy Simms, Wayne K Yu
1Department of Anatomy, University of British Columbia, 2177 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 1Z1.
Psychopharmacology
|June 20, 2002
Summary
Prenatal ethanol exposure alters serotonin receptor function in adult animals, affecting responses to specific agonists. These changes in 5-HT(1A) and 5-HT(2A) receptor function are sex-specific and impact behavior.
Area of Science:
- Neuroscience
- Pharmacology
- Developmental Biology
Background:
- Prenatal ethanol exposure is linked to altered 5-hydroxytryptamine (5-HT) function.
- Ethanol-exposed animals display behavioral issues like impaired response inhibition, anxiety, and aggression.
Purpose of the Study:
- Investigate alterations in 5-HT(1A) and 5-HT(2A) receptor function following prenatal ethanol exposure.
- Assess physiological and behavioral responses to 5-HT receptor agonists (8-OH-DPAT and DOI).
Main Methods:
- Adult female and male offspring from ethanol-exposed and control dams were used.
- Animals received injections of 8-OH-DPAT or DOI to measure hypothermia and wet-dog shakes (WDS).
- Physiological and behavioral responses were recorded at specific time points post-injection.
Main Results:
- Ethanol-exposed animals showed enhanced hypothermic responses to 8-OH-DPAT.
- A blunted dose-dependent hypothermic response to 8-OH-DPAT was observed in ethanol-exposed animals.
- Ethanol-exposed females exhibited increased WDS in response to DOI, unlike males.
Conclusions:
- Prenatal ethanol exposure alters 5-HT(1A) and 5-HT(2A) receptor function in adulthood.
- These alterations in receptor function are sex-specific.
- Findings have implications for understanding behavioral and hormonal changes in ethanol-exposed individuals.