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• W2108374655 abstract "1 The roles of 5-hydroxytryptamine (5-HT) and dopamine systems in mediating the increased feeding induced by buspirone, gepirone and ipsapirone were investigated. 2 All three compounds induced dose-dependent increases in food intake when administered subcutaneously to free feeding rats. Buspirone was effective over a narrower dose range than either gepirone or ipsapirone, and the maximal effect observed was smaller than the effects elicited by gepirone and ipsapirone. 3 Depletion of brain 5-HT with parachlorophenylalanine (PCPA) prevented the effects of equi-effective doses of gepirone (2.5 mg kg−1) and ipsapirone (2.5 mg kg−1), but failed to prevent buspirone (1 mg kg−1)-induced eating. Thus buspirone does not appear to interact with 5-HT systems to elicit feeding. 4 Gepirone (0.2 μg) and ipsapirone (0.04 and 0.2 μg) increased food intake when injected into the dorsal raphé nucleus (DRN), presumably by inhibiting the activity of DRN 5-hydroxytryptaminergic afferents. Buspirone (0.04–5 μg) was ineffective when injected into the DRN. 5 Pretreatment with haloperidol (0.1 mg kg−1, 30 min) significantly attenuated the effects of equi-effective doses of buspirone, gepirone and ipsapirone, indicating that these drugs interact with dopaminergic systems to increase feeding. 6 Previously it has been shown that each of these drugs increases striatal dopamine activity. Increased dopaminergic neurotransmission in the striatum induces a general behavioural activation, which under certain conditions facilitates feeding. It is possible that this mechanism underlies the behavioural effects of buspirone, gepirone and ipsapirone. The effects of gepirone and ipsapirone probably involve an indirect action to inhibit the activity of DRN 5-hydroxytryptaminergic afferents, whereas buspirone interacts directly with dopaminergic systems." @default.
• W2108374655 created "2016-06-24" @default.
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• W2108374655 date "1990-03-01" @default.
• W2108374655 modified "2023-09-25" @default.
• W2108374655 title "The involvement of 5-hydroxytryptaminergic and dopaminergic mechanisms in the eating induced by buspirone, gepirone and ipsapirone" @default.
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• W2108374655 doi "https://doi.org/10.1111/j.1476-5381.1990.tb12961.x" @default.
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