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| 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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| Viana,A.F.; Heckler,A.P.; Fenner,R.; Rates,S.M.K.. |
| The aim of the present study was to assess the analgesic activity of the aerial parts of two Hypericum species native to Southern Brazil, H. caprifoliatum and H. polyanthemum. The antinociceptive effect of the H. polyanthemum cyclohexane extract (POL; 180 mg/kg) and of the H. caprifoliatum methanol (MET) and cyclohexane (CH) extracts (90 mg/kg) was evaluated in the hot-plate (ip and po) and writhing (po) tests using male Swiss CF1 mice weighing 22-27 g (N = 10 per group). All extracts displayed antinociceptive effects in the hot-plate test (MET ip = 48%, MET po = 39%, CH ip = 27%, CH po = 50%, POL ip = 74%, and POL po = 49% compared to control). Pretreatment with naloxone (2.5 mg/kg, sc) abolished the effects of CH and POL, and partially prevented the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Hypericum caprifoliatum; Hypericum polyanthemum; Analgesia; Antinociception; Hot-plate test; Writhing test. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000500011 |
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