毒理性
Dicentrine 被发现是大鼠胸主动脉中一种强效的α1-肾上腺素受体阻断剂,它通过竞争性拮抗去甲肾上腺素(pA2 = 8.19 +/- 0.09)或苯肾上腺素(pA2 = 9.01 +/- 0.10)诱导的血管收缩表现出这一特性。这些效果在去除内皮的主动脉中仍然存在。Dicentrine 通过抑制血栓素的形成和提高腺苷 3': S'-环磷酸的水平,抑制了血小板的聚集和释放反应。(A15323) d-Dicentrine 显著抑制了人类肝癌细胞系 HuH-7 的生长,通过在组织培养中延长其倍增时间。一项体外克隆形成实验表明,d-dicentrine 减少了肝癌细胞系 HuH-7 和 MS-G2 的克隆形成效率。在 21 种肿瘤细胞系中的 MTT 实验也显示,d-dicentrine 对食管癌 HCE-6、淋巴瘤细胞系 Molt-4 和 CESS、白血病细胞系 HL60 和 K562 以及肝癌细胞系 MS-G2 具有最强的细胞毒性。(A15341) Dicentrine 也是一种选择性的α1-肾上腺素受体拮抗剂,具有强大的抗心律失常和抗高血压活性。(A15324)
Dicentrine was found to be a potent alpha 1-adrenoceptor blocking agent in rat thoracic aorta as revealed by its competitive antagonism of noradrenaline- (pA2 = 8.19 +/- 0.09) or phenylephrine (pA2 = 9.01 +/- 0.10)-induced vasoconstriction. These effects still persisted in denuded aorta. Dicentrine inhibited platelet aggregation and release reaction through the suppression of thromboxane formation and elevation of adenosine 3': S'-cyclic monophosphate. (A15323) d-Dicentrine significantly inhibits the growth of human hepatoma cell line HuH-7 by delaying its doubling time in tissue culture. An in vitro colony forming assay showed that d-dicentrine decreased the colony formation efficiency in both hepatoma cell lines, HuH-7 and MS-G2. An MTT assay in 21 tumor cell lines also revealed that d-dicentrine was most cytotoxic to esophageal carcinoma HCE-6, lymphoma cell lines Molt-4 and CESS, leukemia cell lines HL60 and K562, and hepatoma cell line MS-G2. (A15341) Dicentrine is also a selective α1-adrenoceptor antagonist with potent antiarrhythmic and antihypertensive activities. (A15324)
来源:Toxin and Toxin Target Database (T3DB)