Title: 5-HT-Dependent myoclonus in guinea pigs: Mediation through 5-HT1A-5-HT2 receptor interaction
Abstract: Investigations utilizing agonists for 5-HT receptor subtypes have been conducted to determine which 5-HT receptor subtype(s) subserve myoclonus in the guinea pig. Administration of a nonselective 5-HT agonist such as 5-MeODMT (5-HT1A/5-HT2 agonist) induces a dose-dependent behavior characterized by head jerking at low doses (1-2 mg/kg, SC) and full-blown myoclonus (continuous rhythmic whole-body jerking) at higher doses (2.5-5 mg/kg, SC). In contrast, the selective 5-HT1A receptor agonist 8-OH-DPAT and the selective 5-HT2 receptor agonist DOI do not induce myoclonus, and elicit only limited head jerking across an otherwise behaviorally active range of doses (1-5 mg/kg, SC). Importantly, the coadministration of both 8-OH-DPAT and DOI results in the emergence of dose-dependent myoclonic behavior. These data suggest that coactivation of 5-HT1A and 5-HT2 receptors may be required for the induction of myoclonus in the guinea pig.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 11
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