Title : Modulation of the effects of cocaine by 5-HT1B receptors: a comparison of knockouts and antagonists.

Pub. Date : 2000 Nov

PMID : 11164086






7 Functional Relationships(s)
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1 Modulation of the effects of cocaine by 5-HT1B receptors: a comparison of knockouts and antagonists. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
2 To evaluate the role of the 5-HT1B receptor in mediating the actions of cocaine, we used two model systems: knockout (KO) mice lacking the 5-HT1B receptor and an acute treatment with the 5-HT1B/1D antagonist GR127935. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
3 To evaluate the role of the 5-HT1B receptor in mediating the actions of cocaine, we used two model systems: knockout (KO) mice lacking the 5-HT1B receptor and an acute treatment with the 5-HT1B/1D antagonist GR127935. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
4 In contrast, as demonstrated previously, the 5-HT1B receptor KO mice showed a heightened locomotor response to cocaine, as well as an increased propensity to self-administer cocaine. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
5 In contrast, as demonstrated previously, the 5-HT1B receptor KO mice showed a heightened locomotor response to cocaine, as well as an increased propensity to self-administer cocaine. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
6 Thus, an acute pharmacological blockade of the 5-HT1B receptor decreases some effects of cocaine, while a constitutive genetic KO of the same receptor has opposite effects. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus
7 These results suggest that compensatory changes have taken place during the development of the 5-HT1B KO mice, which may have rendered these mice more vulnerable to cocaine. Cocaine 5-hydroxytryptamine (serotonin) receptor 1B Mus musculus