8-OH-DPAT enhances dopamine D-induced maternal disruption in rats
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, ISSN: 1432-1351, Vol: 208, Issue: 4, Page: 467-477
2022
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Article Description
Recent evidence indicates that 5-HT receptors play a significant role in mediating maternal behavior in rats. Given that they also modulate the mesocortical dopamine system, we hypothesized that 5-HT receptors may mediate maternal behavior, possibly by interacting with the D receptor. To address this issue, we used a combination of 5-HT agonist (8-OH-DPAT, 0.5 mg/kg) and two D drugs (an agonist quinpirole, QUIN, 1.0 mg/kg; a potent D antagonist haloperidol, HAL, 0.1 mg/kg) on rat maternal behavior in the home-cage maternal behavior and pup preference tests. We replicated the findings that acute QUIN, HAL, and 8-OH-DPAT disrupted home-cage maternal behavior. When administered in combination, pretreatment with HAL and QUIN worsened 8-OH-DPAT-induced maternal disruption and induced a decrease in the pup preference ratio. Accordingly, 8-OH-DPAT enhanced QUIN’ and HAL’s disruption of pup retrieval and pup preference, reversed the increase in hovering over pups induced by HAL. These findings suggest that activation of 5-HT receptors enhances D-mediated maternal disruption. Furthermore, given that the combination of D drugs and 5-HT agonists only produced an additive effect on maternal disruption, 5-HT receptors may have a direct effect on maternal behavior independent of their interaction with D receptors.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85128174716&origin=inward; http://dx.doi.org/10.1007/s00359-022-01551-4; http://www.ncbi.nlm.nih.gov/pubmed/35434766; https://link.springer.com/10.1007/s00359-022-01551-4; https://dx.doi.org/10.1007/s00359-022-01551-4; https://link.springer.com/article/10.1007/s00359-022-01551-4
Springer Science and Business Media LLC
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