从丹参中筛选血管紧张素转换酶抑制剂

目的 :从丹参中筛选血管紧张素转换酶抑制剂 (ACEI)。方法 :分别提取丹参水溶性和脂溶性部分 ,用荧光检测法筛选抑制血管紧张素转换酶 (ACE)活性的有效部位或成分。结果 :丹参水溶性部分、丹参总酚酸及丹酚酸B显著降低了大鼠肺组织的ACE活性 ,其IC₅₀ 分别为 ( 2.45± 0.07) ,( 0.24± 0.02 ) ,( 0.02± 0.01)g·L^-1。含丹参酮Ⅰ ,Ⅱ的菲醌类成分或脂溶性部分没有作用。 结论 :丹参具有ACEI作用 ,其活性成分存在水溶性部分中 ,主要为含丹酚酸B等酚酸类物质。

Screening of angiotensin converting enzyme inhibitors from Salvia miltiorrhizae

OBJECTIVE: To screen angiotensin converting enzyme inhibitor (ACEI) from traditional Chinese medicine, Salvia miltiorrhiza. METHOD: Hydrophilic and lipophilic fractions of S. miltiorrhiza were isolated, and their effective components were screened by a fluorimetric assay for inhibition of angiotensin converting enzyme (ACE). RESULT: Water-soluble fractions, total salvianolic acids and salvianolic acid B markedly decreased ACE activity of rabbit lung tissue. Their IC50 value were (2.45 +/- 0.07), (0.24 +/- 0.02), (0.02 +/- 0.01) g x L(-1) respectively. Lipophilic components or phenanthraquinones including tanshinone I and II showed no changes on the activity of ACE. CONCLUSION: S. miltiorrhiza inhibits angiotensin converting enzyme and its active components are in aqueous extract, in which the main were salvianolic acids including salvianolic acids B.