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ID:11218425
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时间:2018-07-10
《ph依赖型白头翁汤结肠靶向片制备及体外释放度评价》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、pH依赖型白头翁汤结肠靶向片制备及体外释放度评价摘要目的:拟制备用于治疗痢疾、慢性溃疡性结肠炎、结肠炎等疾病的中药新制剂pH依赖型白头翁汤结肠靶向片,并对其体外释放性能进行考察,探讨制备中药结肠靶向制剂的可行性。方法:以白头翁汤中的有效成分白头翁皂苷B4和盐酸小檗碱为评价指标,对制剂的包衣处方进行筛选;采用体外释放度测定法考察该制剂的体外释放性能。结果:拟定了白头翁汤结肠靶向片的制备方法,并进行了体外释放度评价,体外释放度测定结果表明,在人工胃液2H溶出液中未检测到白头翁皂苷B4和盐酸小檗碱,在人工小肠液
2、4H两指标累积溶出率均小于5%,而在人工结肠液1H两指标累积溶出率均达90%以上。结论:制备得白头翁汤结肠靶向片,该制剂能达到结肠定位释药的目的。关键词pH依赖型白头翁汤结肠靶向片制备方法体外释放度评价【中图分类号】R283;R944.4【文献标识码】A【文章编号】1007-8517(2008)08-0021-03PreparationandinvitroevaluationofpH-dependentBaitouwengsouptabetsforcolon-specificdelivery9FengGu
3、o,LiuwenGuiyangTraditionalChinesemedicinecollege,Guiyang550001AbstractObjectivetobepreparedforthetreatmentofdysentery,chroniculcerativecolitis,colitisandotherdiseases,traditionalChinesemedicinepreparationsnewpH-dependentBaitouweng-colon-specificfilms,andt
4、hereleaseofitsperformanceinvitroinvestigationofthecolontargetofChinesemedicineTothepreparationoffeasibility.MethodsBaitouwengtheactiveingredientsinthesoupBaitouwengsaponinB4andberberinefortheEvaluationoftheprescriptionformulationscoatedscreenusinginvitror
5、eleaseofthedeterminationofInvestigationagentsinvitroreleaseperformance.ResultsBaitouwengsoupdevelopedcolontargetingthefilmpreparationandconductoftheinvitroreleaseoftheevaluation,invitroreleaseofresultsshowthatthedissolutionofgastricjuiceof2hwasnotdetected
6、BaitouwengsaponinB4andberberine,theartificial4htwosmallintestinalfluidaccumulationindicatorsofthe9dissolutionrateoflessthan5percent,whileinthecolonoftwoindicatorsof1hcumulativedissolutionratereached90percent.ConclusionPreparationofaBaitouweng-colon-target
7、ing,theagentscanachievethepurposeofcolon-release.KeywordspH-dependentBaitouwengcolon-targetedfilms,preparationmethodsinvitroreleaseofevaluation口服结肠定位释药系统(OCDDS)是通过药物传递技术,使药物口服后,在上消化道不释放,将药物运送到人体回盲部后开始崩解或蚀解并释放出来,从而使药物定位靶向地到达大肠发挥局部或全身治疗作用的给药系统。9白头翁汤来源于《伤寒论》
8、,是临床常用的经典方,由白头翁、黄连、黄柏和秦皮4味药组成,具有清热解毒、凉血止痢之功效1。主治:热痢下重,腹痛里急,脓血杂下,肛门灼热,苔黄,脉弦数者。经现代大量研究表明2-9,白头翁汤对痢疾(如急性菌痢、热痢、阿米巴痢疾、细菌性痢疾等)、慢性溃疡性结肠炎、结肠炎等疾病的治疗,疗效确切,不良反应小,是临床常用的基础方。但白头翁汤在临床应用中出现使用不方便,口服白头翁汤后药物在到达结肠之前易被吸收分解,直肠给药也到不了结肠,并
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