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Ginkgo biloba leaf extract (EGb 761) enhances catalepsy induced by haloperidol and L-nitroarginine in mice BJMBR
Fontana,L.; Souza,A.S.; Del Bel,E.A.; Oliveira,R.M.W. de.
Ginkgo biloba extract EGb 761 has been reported to have therapeutic effects which have been attributed to anti-oxidant and free radical-scavenging activities, including a direct action on nitric oxide production. L G-nitro-arginine (L-NOARG), a nitric oxide synthase inhibitor, and haloperidol, a drug that blocks dopamine receptors, are both known to induce catalepsy in rodents. Nitric oxide has been shown to influence dopaminergic transmission in the striatum. The purpose of the present study was to evaluate the effect of the extract obtained from leaves of Ginkgo biloba tree EGb 761 on catalepsy induced by haloperidol or by L-NOARG. Albino Swiss mice (35-45 g, N = 8-12) received by gavage a single or repeated oral dose (twice a day for 4 days) of EGb 761...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Nitric oxide; Ginkgo biloba; Catalepsy; Herbal medicine; Neuroleptic interaction; Extrapyramidal system.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001100012
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Dopaminergic profile of new heterocyclic N-phenylpiperazine derivatives BJMBR
Neves,G.; Fenner,R.; Heckler,A.P.; Viana,A.F.; Tasso,L.; Menegatti,R.; Fraga,C.A.M.; Barreiro,E.J.; Dalla-Costa,T.; Rates,S.M.K..
Dopamine constitutes about 80% of the content of central catecholamines and has a crucial role in the etiology of several neuropsychiatric disorders, including Parkinson's disease, depression and schizophrenia. Several dopaminergic drugs are used to treat these pathologies, but many problems are attributed to these therapies. Within this context, the search for new more efficient dopaminergic agents with less adverse effects represents a vast research field. The aim of the present study was to report the structural design of two N-phenylpiperazine derivatives, compound 4: 1-[1-(4-chlorophenyl)-1H-4-pyrazolylmethyl]-4-phenylhexahydropyrazine and compound 5: 1-[1-(4-chlorophenyl)-1H-1,2,3-triazol-4-ylmethyl]-4-phenylhexahydropyrazine, planned to be dopamine...
Tipo: Info:eu-repo/semantics/other Palavras-chave: N-phenylpiperazine derivatives; Dopamine; Apomorphine hypothermia; Amphetamine stereotypy; Catalepsy.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000500010
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Acute effects of selective serotonin reuptake inhibitors on neuroleptic-induced catalepsy in mice BJMBR
Pires,J.G.P.; Bonikovski,V.; Futuro-Neto,H.A..
Depression found in Parkinson disease (PD) usually responds to selective serotonin reuptake inhibitors (SSRIs). Drugs that modify experimental neuroleptic catalepsy (NC) might affect extrapyramidal symptoms in PD. Therefore, the effects of SSRIs on NC were tested in mice, 26-36 g, separated by sex. Catalepsy was induced with haloperidol (H; 1 mg/kg, ip) and measured at 30-min intervals using a bar test. An SSRI (sertraline, ST; paroxetine, PX; fluoxetine) or vehicle (C) was injected ip 30 min before H. Dunnett's test was used for comparison of means. ST (1-5 mg/kg) or PX (1-5 mg/kg) attenuated NC, with a similar inhibition found in both sexes (5 mg/kg, 180 min: ST - males: 124 ± 10 vs 714 ± 15 s in C; females: 116 ± 10 vs 718 ± 6 s in C; PX - males: 106 ±...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Selective serotonin reuptake inhibitors; Fluoxetine; Sertraline; Paroxetine; Extrapyramidal system; Catalepsy.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001200015
Registros recuperados: 3
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