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1979•Indian Journal of PharmacologyRequires access

Effect of L-histidine pretreatment on haloperidol induced catalepsy and ethamphetamine stereotypy in mice

VV Joshi, MP Muley, J J Balsara, Chandorkar Ag

Open publisher page 4 citations

Abstract

. Pretreatment with L-histidine, precursor of histamine, was found to potentiate haloperido1 induced catalepsy and to antagonise methamphetamine stereotypy while pretreatment with chlorcyclizine, a H1-receptor blocker, was found to antagonise haloperidol catalepsy and to potentiate methamphetamine stereotypy: Further, chlorcyclizine was found to antagonise the potentiating effect of L-histidine on haloparidol catalepsy and also the inhibitory effect of L histidine on methamphetamine stereotypy. Our results indicate that the central histaminergic system by exerting a modulatory influence on the striatal dopaminergic system may influence the functioning of the extrapyramidal motor system.

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. Pretreatment with L-histidine, precursor of histamine, was found to potentiate haloperido1 induced catalepsy and to antagonise methamphetamine stereotypy while pretreatment with chlorcyclizine, a H1-receptor blocker, was found to antagonise haloperidol catalepsy and to potentiate methamphetamine stereotypy: Further, chlorcyclizine was found to antagonise the potentiating effect of L-histidine on haloparidol catalepsy and also the inhibitory effect of L histidine on methamphetamine stereotypy. Our results indicate that the central histaminergic system by exerting a modulatory influence on the striatal dopaminergic system may influence the functioning of the extrapyramidal motor system.

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Available abstract

. Pretreatment with L-histidine, precursor of histamine, was found to potentiate haloperido1 induced catalepsy and to antagonise methamphetamine stereotypy while pretreatment with chlorcyclizine, a H1-receptor blocker, was found to antagonise haloperidol catalepsy and to potentiate methamphetamine stereotypy: Further, chlorcyclizine was found to antagonise the potentiating effect of L-histidine on haloparidol catalepsy and also the inhibitory effect of L histidine on methamphetamine stereotypy. Our results indicate that the central histaminergic system by exerting a modulatory influence on the striatal dopaminergic system may influence the functioning of the extrapyramidal motor system.

Key concepts: Stereotypy, Catalepsy, Histaminergic, Haloperidol, Methamphetamine, Pharmacology, Dopaminergic, Chemistry

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Effect of L-histidine pretreatment on haloperidol induced catalepsy and ethamphetamine stereotypy in mice — Research Paper | ScholarLens