结肠靶向给药系统研究进展

通过查阅国内外文献综述近年来国内外结肠靶向给药的研究动态,结肠靶向给药系统的几种类型：ｐＨ依赖型,时滞释药型和菌群触发型及其所使用的材料。介绍了结肠的特殊生理结构和功能,阐明药物在结肠的吸收和作用机理。     

结肠靶向给药系统研究概况

本文对结肠靶向给药系统的特点、当前制剂学手段进行介绍与分析，认为结肠靶向给药对便秘、结肠炎、大肠癌等肠道疾病的治疗以及蛋白多肽药物的口服给药都具有重要意义，是一个极具前景的新药研究领域。     

口服结肠靶向给药系统的研究现状

通过查阅献资料，综述了近几年来国内外口服结肠靶向药给系统的研究情况，介绍了口服结肠靶向给药的概念及其优点和结肠靶向给药系统的几种类型：pH依赖型，时滞释药型，菌群触发型及其使用的材料。     

基于纳米技术的结肠靶向给药系统研究进展

通过纳米技术将药物直接纳米化或包封于纳米载体后进行结肠靶向给药,可使药物在胃、十二指肠、空肠、回肠前端不释放药物,直至将药物运送至回盲部才释放,从而发挥结肠局部或全身治疗作用.这一纳米给药技术能消除体内生理环境的作用,防止药物进入结肠靶点前被破坏或降解.利用纳米药物载体比表面积大、界面活性高的特点,通过对其进行表面修饰,还可避免其被体内的免疫系统识别、吞噬,克服体内的"生物屏障",从而实现体内结肠靶向给药[1].     

结肠靶向给药系统

本文介绍结肠的特殊生理结构和功能．综述3种结肠靶向给药系统的制备方法及其所用的材料。阐明药物在结肠的吸收和作用机理。     

新型结肠靶向给药系统

结肠靶向给药系统已取得一定进展，主要包括：前体药物、pH依赖型、时滞型及菌群触发型等。恰当的结肠给药系统要求释药机制只与结肠的特定生理因素相关。随着研究深入，近年来研发出一些新的结肠给药系统，它们设计原理独特、靶向性强、适合于工业化生产。本文将在回顾以往给药系统的基础上，对这些新的给药系统的制备及其体内外评价进行详细描述。     

结肠吸收及结肠靶向给药

目的：对目前结肠吸收及其靶向给药方面的研究进行综述。方法：讨论药物结肠吸收特点和结肠靶向给药方法。结果：结肠是多肽药物口服的最佳吸收部位和缓控释制度口服持续吸收的重要部位。结肠靶向制剂可用于结肠局部病患的治疗和多肽药物的口服给药。结论：结肠吸收及其靶向给药是有意义而又有许多有待研究的领域。     

结肠靶向给药系统的研究

２０年前 ,人们对用于溃疡性结肠炎的药物吡柳磺胺 (Ｓｕｌｆ＿ａｓａｌａｚｉｎｅ)的作用方式已经有了充分的了解 ,并且发现口服轻泻剂只有到达大肠后才发挥作用。因此 ,人们对结肠靶向给药产生了兴趣 ,并且不断地开发各种结肠靶向给药系统［１］。升结肠和大部分横结肠只有口服途径能接触到 ,直肠给药很少能把药物运送到结肠 ,所以发展口服结肠靶向给药系统具有重要意义。口服结肠靶向给药系统中的药物在上消化道中不释放 ,只有当药物到达人体回盲部后 ,才能使给药系统把药物释放出来 ,并且在结肠部发挥局部或全身治疗作用。１结肠靶向给…     

口服结肠靶向给药系统的研究进展

口服结肠靶向给药系统在药物转运和治疗结肠局部疾病方面具有重要作用。本文总结了口服结肠靶向给药系统近年来的研究概况,并对结肠靶向药物制剂的体内、外评价方法作一介绍。     

口服结肠给药系统的研究进展

口服结肠靶向给药系统(oral colon targetting drug deliv-ery system,OCTDDS))将治疗结肠疾病的药物靶向输送至结肠,不仅降低常规的口服或直肠给药的毒副作用,且能将药物输送至病灶处,减少给药剂量,提高患者的顺应性;还能提高多肽、蛋白等类药物口服给药的生物利用度。笔者将近年有关口服结肠给药系统的研究综述如下。1口服结肠释药系统的应用1.1时控给药根据时辰药理学原理,应用药剂手段使药物在一定的时滞后释放,使之与人的生理周期相匹配,可用于治疗哮喘、高血压、心绞痛、消化道溃疡及风湿性关节炎等具有节律性的疾病。结肠靶向给药…     

中药靶向制剂研究进展

检索了近5年(1999-2004年)来万方、维普、CNKI、PubMed和ScienceDirect数据库中有关中药靶向制剂研究的文献,井对其进行了综合分析和总结.从微球制剂、复合性乳剂以及脂质体三方面对中药靶向制剂的研究进展作了介绍和展望.指出了中药靶向制剂研究存在的问题与进一步研究的建议.中药靶向制剂的研究切实可行,并且具有其独特的临床意义和优势.     

Application of traditional Chinese medicine preparation in targeting drug delivery system

Abstract

Targeting drug system (TDS) or targeted drug delivery system (TDDS) is a new kind of drug delivery system which could make drug to be directly concentrated on the target site with high curative effects and low side-effects. As the quintessence of Chinese culture, traditional Chinese medicine (TCM) has a large advantage in many disease clinical treatments, especially in cancer, hypertension and many other intractable diseases owing to their low toxicity and side-effects relative to western medicine. This article reviews literatures on development of TCM-targeted preparations which were published in the past 10 years. TDS including active-targeting, passive-targeting and physical-chemical-targeting preparations were introduced through domestic and overseas literatures to reveal the unique advantages of TCM-targeting preparations in drug delivery system. In this article, we have reviewed some kinds of TCM-targeting preparations and indicated that great attention should be paid to the research on the TCM-targeting preparations.     

Polymers for colon targeted drug delivery

The colon targeted drug delivery has a number of important implications in the field of pharmacotherapy. Oral colon targeted drug delivery systems have recently gained importance for delivering a variety of therapeutic agents for both local and systemic administration. Targeting of drugs to the colon via oral administration protect the drug from degradation or release in the stomach and small intestine. It also ensures abrupt or controlled release of the drug in the proximal colon. Various drug delivery systems have been designed that deliver the drug quantitatively to the colon and then trigger the release of drug. This review will cover different types of polymers which can be used in formulation of colon targeted drug delivery systems.     

Developments in drug delivery of bioactive alkaloids derived from traditional Chinese medicine

The bioactive alkaloids (e.g. vincristine, hydroxycamptothecin, ligustrazine, and so on) from traditional Chinese medicine (TCM) have exerted potent efficacies (e.g. anti-tumor, anti-inflammation, immunosuppression, etc.). However, a series of undesirable physicochemical properties (like low solubility and weak stability) and baneful pharmacokinetic (PK) profiles (e.g. low bioavailability, short half time, rapid clearance, etc.) have severely restricted their applications in clinic. In addition, some side effects (like cumulative toxicities caused by high-frequency administration and their own toxicities) have recently been reported and also confined their clinical uses. Therefore, developments in drug delivery of such alkaloids are of significance in improving their drug-like properties and, thus, treatment efficiencies in clinic. Strategies, including (i) specific delivery via liposomes; (ii) sustained delivery via nanoparticles, gels, and emulsions; and (iii) transdermal delivery via ethosomes, solid lipid nanoparticles, and penetrating enhancers, have been reported to improve the pharmacokinetic and physicochemical characters of problematic TCM alkaloids, decline their adverse effects, and thus, boost their curative efficacies. In this review, the recent reports in this field were comprehensively summarized with the aim of providing an informative reference for relevant readers.     

中药口服缓控释给药系统质量评价体系的构建

中药口服缓控释给药系统是中药新型给药系统研究的热点, 而中药口服缓控释给药系统质量评价体系是其安全性、有效性的重要保证, 本文就如何构建中药口服缓控释给药系统质量评价体系进行了探讨。     

壳聚糖在靶向制剂中的应用进展

壳聚糖是一种天然高分子化合物，壳聚糖及其衍生物具有优良的生物相容性和生物可降解性，在制药业有广阔的应用前景。综述了近几年来壳聚糖及其衍生物在靶向制剂中的应用。     

自乳化制剂的研究进展

本文综述了近年来自微乳化给药系统(SMEDDS)的研究进展,对自微乳化给药系统的处方优化、质量评价和新型表面活性剂的使用进行了探讨,并对自乳化制剂(SEDDS)在中药新制剂的形成与实际应用进行了展望。     

紫杉醇靶向制剂的研究进展

目的介绍紫杉醇靶向制剂的研究进展。方法综述近年来国内外相关研究,介绍紫杉醇靶向制剂的制备方法、性能和药效等,指出目前紫杉醇靶向制剂的研究前景。结果紫杉醇靶向制剂不仅提高紫杉醇的溶解度,而且降低其毒副作用。结论紫杉醇靶向制剂为癌症化疗提供了新的研究途径,是很有临床应用前景的抗癌药物剂型。     

关于中药新药研发创新的几点思考

基于对近年来中药新药研发和注册申请状况的回顾分析,从中药新药技术审评和注册管理的视角,阐述了对中药新药研发创新议题的若干观点。包括对中药新药研发创新内涵的理解,对中药新药研发创新具体形式的认识,以及对当前中药新药研发创新方面存在问题的剖析等。     

肝靶向给药系统的研究进展

通过对近年来国内外报道的肝靶向研究相关文献进行检索,根据肝靶向药物的不同作用机制对肝靶向给药系统的研究进展进行分析和总结。有关肝靶向药物的研究结果表明,肝靶向给药系统能选择性地将药物输送至肝脏病变部位,通过提高其在肝脏病变组织的药物浓度,从而达到增强药物疗效、减少其毒副作用的目的。因此,肝靶向给药系统在肝脏疾病治疗方面具有广阔的应用前景。