Abstract
Studies in CBA mice and Wistar rats demonstrated the involvement of serotonin (5-HT) receptors in immunosuppression evoked using the selective δ2 opioid receptor (δ2-OR) agonist DSLET (100 μg/kg). This opioid effect was seen in conditions of selective activation of 5-HT1A autoreceptors with 8-OH-DPAT (0.1 mg/kg) and in conditions of prior blockade of postsynaptic 5-HT1A and 5-HT2A receptors with WAY-100635 and ketanserin (1 and 3 mg/kg). The question of the different contributions of these types of 5-HT receptor to δ-induced suppression of the immune response is discussed.
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