OBJECTIVE: To observe the antagonism effects of both alcohol and ethyl acetate extracts, monomer CA 1201 three components from Chinese herb Cissus assamica on endothelin 1 (ET 1) biological responses in vivo and in vitro.

• 目的：观察红背丝绸2种提取物和单体（CA?1201）对内皮素?1（endothelin?1，ET?1）生物效应的拮抗作用。 方法：用红背丝绸3种提取物对ET?1致小鼠急性死亡、血管收缩和升压作用的拮抗，探索用中草药拮抗ET的生物效应。