Blockade of the bradykinin-evoked diphasic response of isolated rat duodenum by the crude extract of and compounds obtained from Mandevilla velutina
Braz. j. med. biol. res
;
21(5): 1015-8, 1988. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-63603
ABSTRACT
The influence of an aqueous/ethanolic extract of M. velutina (CE) and of two compound (MV 8608 and MV 8612) purified from the plant on BK-, Ad- and K+ -induced responses of the rat duodenum was analyzed in vitro. In preparations precontracted with Ca2+, the CE (1 and 2 mg/ml) markedly inhibited BK -induced relaxation in a dose-dependent manner but was less effective against Ad-induced relaxation. The CE (0.5 mg/ml) also antagonized BK -induced relaxation and contraction of strips bathed in normal medium. The two compounds from M. velutina (10 and 20 microng/ml) also promoted a dose-dependent blockade of both responses to BK, only slightly depressing the response to K+
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Índice:
LILACS (Américas)
Assunto principal:
Plantas Medicinais
/
Bradicinina
/
Extratos Vegetais
/
Epinefrina
/
Duodeno
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
1988
Tipo de documento:
Artigo
/
Congresso e conferência
/
Documento de projeto
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