B.triquetrum是生长于巴西沿海地区的一种红海藻,作者研究了从该海藻中提取的植物凝集素(BTL)的血管舒张作用和机理。将含或不含内皮的大鼠离体主动脉环分别用去氧肾上腺素预处理使之呈强直性收缩,尔后累计给予BTL(1～100μg/mL)。结果显示,对内皮完整的主动脉环,BTL在 B. triquetrum is a kind of red seaweed that grows in the coastal area of ​​Brazil. The authors studied the vasodilating effect and mechanism of lectin (BTL) extracted from the seaweed. Rat isolated aortic rings with or without endothelium were pretreated with phenylephrine for ankylosing contraction and BTL (1-100 μg/mL) was cumulatively administered. The results showed that for the intact aortic ring, BTL is