Terapéutica farmacológica del trastorno delirante / Pharmacologic treatment of delusional disorder

La literatura disponible acerca de la terapéutica del trastorno delirante sugiere que esta entidad no responde bien a los tratamientos neurolépticos habituales. Varios trabajos informan de casos que responden a pimozida, luego de no haber respondido a otros antipsicóticos. No obstante, se carece de estudios controlados. Por este motivo no es posible llegar a conclusiones definitivas al respecto

Effect of pimozide on the increase of muscarinic receptors caused by mazindol and apomorphine in the rat cerebral motor cortex

The effects of pimozide, mazindol and apomorphine on muscarinic receptors in homogenates of rat cerebral motor cortex were measured by binding assays, using 3H-N-methylscopolamine (3H-NMS) alone as ligand (for the measurement of M1- and M2-like receptors) or in the presence of carbachol or pirenzepine for determination of M1- and M2-like receptors, respectively. Female Wistar rats (150g) were treated daily for one week with pimozide, a dopaminergic antagonist (10 and 20 mg/Kg, po, by gavage), or with apomorphine (1mg/Kg,ip). In another ser of experiments, animals were treated with pimozide and 30 min later with mazindol (10 mg/Kg, po, by gavage) or apomorphine. The drugs were administered daily for one week. Controls received the same volume of saline. 3H-NMS binding was increased from the control value of 418 ñ 17 ñ 42 fmol/mg protein by administration of mazindol (10mg/Kg) but binding was reduced to 360 ñ 11 fmol/mg protein upon administration of pimozide (20mg/Kg) plus mazindol (10mg/Kg. Similarly 10 mg/ Kg pimozide reduced the increase in M1-like receptors caused by mazindol from 262 ñ to 220 ñ 20 fmol/mg protein. Although 20 mg/Kg pimozide alone produced a decrease in M1-plus M2-like receptors (from 418 ñ 17 to 348 ñ 22 fmol/mg protein), its action was preferentially on M2-like receptors, decreasing them from 148 ñ 10 to o ñ 15 fmol/mg protein in the control and treated groups, respectively. At the higher dose, 20 mg/Kg pimozide also inhibited the 3 H-NMS binding (M1-plus M2-like receptors) in the presence of apomorphine (263ñ25 vs 418 ñ 17 fmol/mg protein...

Participaçäo colinérgica nos efeitos das drogas antipsicóticas na febre devida a um pirogênio bacteriano / Cholinergic participation in effects of antipsichotics drugs in the fever elicited by one bacterial pyrogen

Os resultados mostraram que a associaçäo de atropina às drogas antipsicóticas produziu reduçäo da resposta febril, quando clorpromazina e flufenazina foram os antipsicóticos utilizados. A associaçäo de atropina ao haloperidol e ao pimozide potencializou a resposta febril

Possível envolvimento dopaminérgico na resposta febril induzida pelo lipopolissacarídeo de E. coli, no coelho / Dopaminergic involvement in the fever response induced in rabbits by lipopolysaccharide from E. coli

Drogas neurolépticas como a clorpromazina (CLOR), flufenazina (Flu), haloperidol (HAL) e pinozide (Pim), conhecidas por atuarem como antipsicóticas e bloqueadoras de receptores dopaminérgicos centrais, inibiram parcialmente a resposta febril induzida pelo lipopolissacarídeo de E. coli (LPS), um pirogênio bacteriano, em coelhos. Os presentes resultados sugerem que os receptores dopaminérgicos centrais podem estar envolvidos nessa resposta febril, muito embora essa mobilizaçäo näo represente o principal mecanismo