Modulation of delta opioid-evoked hypothermia in rats by WAY 100635 and fluoxetine.
Delta opioid receptor and 5-hydroxytryptamine (5-HT) interactions in rats were investigated using the endpoint of hypothermia. The intraperitoneal (i.p.) administration of SNC-80, a delta opioid agonist (35mg/kg, i.p.), produced a significant hypothermia. For combined administration, SNC-80-evoked hypothermia was (1) abolished by pre-treatment with naltrindole (5mg/kg, i.p.); (2) attenuated by pre-treatment with WAY 100635 (1mg/kg, s.c.), a 5-HT(1A) antagonist; and (3) enhanced by pre-treatment with non-hypothermic doses of fluoxetine (2.5, 5 and 10mg/kg, i.p.). The present data reveal that 5-HT(1A) receptor activation mediates a significant proportion of the hypothermic response to delta opioid receptor activation and that a 5-HT uptake blockade potentiates delta receptor-induced hypothermia.[1]References
- Modulation of delta opioid-evoked hypothermia in rats by WAY 100635 and fluoxetine. Rawls, S.M., Cowan, A. Neurosci. Lett. (2006) [Pubmed]
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