地骨皮甲素是一种从地骨皮中分离出的生物碱类物质,具有显著降压作用。地骨皮为茄科植物枸杞的干燥根皮。春初或秋后采挖根部,洗净,剥取根皮,晒干,用于治疗阴虚潮热、骨蒸盗汗、肺热咳嗽、咳血、内热消渴等症。现代药理学研究表明其具有降血压、降血糖、调血脂、解热、抗菌及抗病毒等活性。
制备取5kg地骨皮,粉碎至60目,置于CO₂超临界萃取罐中。通入液态CO₂,流量为2ml/min/g原料;同时通入90%甲醇做夹带剂,流量同样控制在2ml/min/g。将原料温度设定在40℃,压力维持在23MPa条件下萃取2小时后解析。得萃取物用99%甲醇溶液溶解,并通过过氧化铝短柱(250g中性氧化铝,粒度120-200目)收集液体浓缩,得浸膏。以氯仿、甲醇和水按3:2:3混合为流动相,主机转速设为850rpm,流速2ml/min,紫外检测器在线监测,收集流分减压干燥后即得地骨皮甲素。经HPLC检测,含量达98.3%。
生物活性Kukoamine A 是一种天然的精胺衍生物,是有效的锥虫硫磷还原酶(trypanothione reductase)抑制剂,Ki 值为 1.8 μM,具有抗高血压活性。
靶点地骨皮甲素是一种白色结晶性粉末,可溶于甲醇、乙醇和DMSO等有机溶剂,来源于地骨皮。
用途用于含量测定/鉴定/药理实验等。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3,4-二羟基苯基丙酸 | dihydrocaffeic acid | 1078-61-1 | C9H10O4 | 182.176 |
The benefits of lowering blood pressure (BP) are well established for the prevention of cardiovascular disease. While there are a number of pharmaceuticals available for lowering BP, there is considerable interest in using dietary modifications, lifestyle and behaviour changes as alternative strategies. Kukoamines, caffeic acid derivatives of polyamines present in solanaceous plants, have been reported to reduce BP. We investigated the effect of orally administered synthetic kukoamine A on BP in the Spontaneously Hypertensive Rat (SHR) laboratory animal model of hypertension. Prior to the hypertension study, we determined the safety of the synthetic kukoamine A in a single oral dose (5 or 10 mg kg-1bodyweight) 14-day observational study in mice. No negative effects of the oral administration of kukoamine A were observed. We subsequently investigated the effect of daily oral doses of kukoamine A (0, 5, 10 mg kg-1bodyweight) for 35 days using the SHR rat model of hypertension. The normotensive control Wistar Kyoto (WKY) strain was used to provide a baseline for normal BP in rats. We observed no effect of orally administered synthetic kukoamine A on arterial hypertension in this laboratory animal model of hypertension.