申请人:——
公开号:US20030050226A1
公开(公告)日:2003-03-13
The invention involves the formation of a prodrug from a fatty acid carrier and a neuroactive drug. The prodrug is stable in the environment of both the stomach and the bloodstream and may be delivered by ingestion. The prodrug passes readily through the blood brain barrier. Once in the central nervous system, the prodrug is hydrolyzed into the fatty acid carrier and the drug to release the drug.
In a preferred embodiment, the carrier is 4, 7, 10, 13, 16, 19 docosahexa-enoic acid and the drug is dopamine. Both are normal components of the central nervous system. The covalent bond between the drug and the carrier preferably is an amide bond, which bond may survive the conditions in the stomach. Thus, the prodrug may be ingested and will not be hydrolyzed completely into the carrier molecule and drug molecule in the stomach.
该发明涉及利用脂肪酸载体和神经活性药物制备前药。该前药在胃和血液中均稳定,并可通过口服途径输送。该前药可轻易穿过血脑屏障。一旦进入中枢神经系统,前药将水解成脂肪酸载体和药物以释放药物。在优选实施例中,载体为4,7,10,13,16,19二十二碳六烯酸,药物为多巴胺。两者均为中枢神经系统的正常成分。药物和载体之间的共价键通常是酰胺键,这种键可以在胃中的条件下存活。因此,前药可以被口服,并不会在胃中完全水解成载体分子和药物分子。