姜黄素治疗银屑病的机制及其局部递送系统研究进展

银屑病(psoriasis)是一种炎症性皮肤疾病,其临床表现以红斑与鳞屑为主,病程较长,并且较难治愈。姜黄素属于一种酚类物质,提取自中药姜黄(Rhizoma Curcumae Longae),有抗炎、抗氧化、抗肿瘤等药理作用,对于银屑病治疗有一定效果。由于姜黄素存在口服给药利用度低、传统外用给药渗透性差等局限性,为了提高姜黄素的利用率并扩大其在银屑病等慢性皮肤病中的应用,姜黄素局部递送系统的研究成为热点。该文主要综述了姜黄素治疗银屑病的作用机制,并总结了近年来对姜黄素局部药物递送系统的研究进展,为进一步研究姜黄素提供参考。     

超声微泡介导的基因递送系统应用进展

超声波可聚焦于体内的特定部位。含气体微泡既可以作为医学超声显像的造影剂，又可以作为药物或基因载体。超声微泡有望实现基因的靶向递送，因此成为药物递送系统研究的热门领域。本文阐述了超声微泡介导的基因递送系统在心肌、血管、骨骼肌和肿瘤组织等方面的研究进展，讨论其在未来应用中面临的问题。     

红细胞作为药物递送系统的研究进展

传统的治疗药物存在稳定性差、摄取效率低、细胞毒性大以及靶向能力差等缺点。因此需要安全的药物传递系统来延长药物在体内的循环和暴露。以红细胞为载体的新型药物递送系统凭借其良好的生物相容性、低免疫原性以及长循环时间而逐渐成为理想的药物递送平台。基于红细胞的药物递送系统包括多种类型,主要有红细胞膜包裹纳米颗粒载药系统和基因工程红细胞等。另外,对红细胞进行功能化修饰,可显著增强靶向性,进一步开发和扩大红细胞载药体系在多种疾病治疗中的应用。本研究介绍了以红细胞为载体的化学药物及疫苗的递送方法,重点讨论了仿生纳米红细胞药物递送系统及其对机体各部位的靶向性研究,并且总结了近年来基因工程红细胞策略的研究进展。     

固体自微乳药物递送系统的研究进展

作为一种新型的药物递送系统,固体自微乳药物递送系统可以显著提高水难溶性药物的口服生物利用度,且具有液态自微乳和固体制剂二者的优势。通过设计不同的辅料处方和包衣技术,可以控制药物释放使其具有靶向性,来达到不同的给药目的。固体自微乳药物递送系统的应用前景广阔,具有研究意义。本文对固体自微乳载体、固化技术、固体自微乳新制剂的应用进行了总结归纳,为提高水难溶性药物释放的固体自微乳化技术的研究提供了参考。     

脂质类纳米载体在难溶性药物递送中的应用

随着新技术在药物研发中的广泛应用,大量有活性的难溶性候选药物涌现出来,但水溶性差的问题又严重制约了此类药物的开发。目前纳米载体作为难溶性药物递送系统的研究日益增多。本文综述了微乳、脂肪乳、脂质体、固体脂质纳米粒、纳米脂质载体、脂质纳米混悬剂和仿生载体等脂质类纳米载体在难溶性药物递送中的应用,旨在为产品的开发提供新策略。     

姜黄素纳米制剂抗消化系统肿瘤的药理作用研究进展

姜黄素（curcumin）是从姜黄中提取的多酚化合物,具有抗肿瘤、抗炎、抗菌等广泛的药理活性,但其溶解度低、生物利用度差、药动学差,限制了该药的临床应用。近年来,基于纳米技术的药物递送系统（主要包括纳米颗粒、脂质体、胶束、聚合物、纳米凝胶等）有效改善了姜黄素的生物利用度和溶解性,提高了体内药物活性。就姜黄素纳米制剂在消化系统肿瘤（胃癌、肝癌、结直肠癌、胰腺癌和食管癌）中的应用进行综述,旨在为姜黄素纳米制剂的进一步研究与利用提供参考。     

多肽介导的核酸药物递送系统研究进展

核酸药物作为新型基因治疗药物备受关注,但生物学稳定性差、易被体内核酸酶降解、生物利用度低、靶组织内聚集浓度低等是制约其发展的主要因素。新的药物递送技术的快速发展在一定程度上解决了核酸药物的稳定性及靶向递送问题,极大地推动了核酸药物的研发进展。尤其是多肽蛋白类递送载体,已成为核酸药物递送系统研究领域的热点之一。介绍核酸药物递送载体多肽修饰的两种主要方式——共价缀合和非共价络合,重点综述近年来多肽缀合物和复合物以及多肽修饰的载体在核酸药物递送系统中的应用研究,探讨多肽介导的核酸药物递送系统在应用中存在的问题,为新型核酸药物递送系统研发提供参考。     

柠檬酸递送药物的研究进展

柠檬酸因价廉易得,具有良好的生物相容性、生物可降解性和多功能性受到了广泛关注,已经发展出了众多的柠檬酸基生物材料,并在药物递送系统取得实际进展。总结了柠檬酸在递送基因治疗药物、蛋白质治疗药物、免疫治疗药物、化学治疗药物中的研究进展,希望柠檬酸在药物递送系统得到进一步的研究发展。     

纳米制剂在透皮药物递送系统中的应用研究进展

透皮药物递送系统作为一种非侵入式给药途径，与传统给药方式相比具有顺应性高、无首过效应等优势。纳米技术的应用使得透皮药物递送系统的药物选择范围进一步扩大，并提高了药物的治疗效果，形成了一种极具价值、令人期待的新型给药方式。目前常用于透皮药物递送系统的纳米制剂包括纳米乳、脂质纳米囊泡、脂质纳米粒、聚合物纳米粒、纳米晶体、溶致液晶纳米粒等。介绍了皮肤屏障和透皮递送的常用促渗方法，综述了各类应用于透皮药物递送系统的纳米制剂及其与物理促渗方法联合应用的研究进展，以期为纳米制剂在透皮递送方面的深入研究提供参考。     

非病毒基因递送载体的研究进展

目前,基因药物的递送成为药学研究的热点,基因递送载体主要包括病毒载体和非病毒载体。非病毒基因载体的毒性低,生物相容性好,转染效率高,具有潜在的临床应用价值。本文就靶向递送基因载体、多功能基因载体、同时载基因与化疗药物的载体、智能基因载体和脂质体等非病毒基因递送载体的研究进展做一综述。     

姜黄素纳米颗粒在中枢神经系统疾病中的研究进展

姜黄素是一种提取自姜黄的多酚类化合物，具有神经保护作用，可以通过血脑屏障，是治疗多种神经系统疾病候选的理想药物。在胶质瘤、脑血管病、癫痫、神经退行性疾病和创伤性脑损伤等神经系统疾病中的作用已受到广泛关注。然而，姜黄素因生物利用率低，导致应用受到限制。近年来，人们发现纳米颗粒可有效提高姜黄素生物利用率。众多前期临床试验中发现，纳米颗粒药物输送系统使姜黄素药理作用得到了良好的应用。因此，本文就姜黄素纳米颗粒对中枢神经系统各类疾病的作用及机制的最新研究进展进行综述，以期为姜黄素在神经系统的广泛应用提供参考。     

壳多糖及其衍生物在动物细胞培养中的应用研究进展

壳多糖作为一种碱性天然多糖 ,由于其无毒且具有良好的生物及组织相容性而备受人们的重视 ,本文综述了壳多糖及其衍生物作为细胞培养微载体材料、生物微胶囊材料、基因转移载体、细胞培养生物因子及作为药物吸收促进因子 5个方面的研究进展。     

姜黄素纳米制剂在肿瘤治疗中的研究进展

姜黄素是一种天然的多酚类化合物,广泛存在于包括姜黄在内的多种草本植物中。它是一种天然的抗氧剂,具有许多的药理活性,安全有效,尤其是抗肿瘤作用受到广泛的关注。但由于姜黄素的水中溶解度差、光降解、化学不稳定以及生物利用度低等问题限制了其在临床的广泛应用。因此,需要开发适当的给药系统来解决这一问题。本文综述了近年来姜黄素纳米制剂在肿瘤治疗中的研究进展,重点阐述了其抗肿瘤纳米制剂的种类及其在细胞和动物实验中的应用,为进一步的研发提供依据。     

PCL-PEG-PCL载姜黄素纳米粒子的制备以及体外药物释放的考察

目的制备一种生物可降解、生物相容性良好的姜黄素纳米粒子,并对其体外药物释放行为进行考察。方法采用开环聚合法制备生物可降解的PCL-PEG-PCL三嵌段聚合物,然后采用乳液挥发法制备负载姜黄素的PCL-PEG-PCL纳米粒子,通过透射电镜观察所制备纳米粒子的形貌特征,动态光散射(DLS)测定粒径,采用HPLC测定纳米粒子的包封率和载药量,同时考察其体外药物释放行为。结果姜黄素纳米粒子具有球形结构,粒径在200 nm左右,载药量为(14.23±0.35)%,3 d体外累积释药量65%。结论所制备的姜黄素纳米粒子具有较高的载药量和包封率,同时体外药物释放实验证实姜黄素纳米粒子具有良好的缓释功能。     

Lung-targeted delivery system of curcumin loaded gelatin microspheres

The purpose of the study is to design and evaluate curcumin loaded gelatin microspheres (C-GMS) for effective drug delivery to the lung. C-GMS was prepared by the emulsification-linkage technique and the formulation was optimized by orthogonal design. The mean encapsulation efficiency and drug loading of the optimal C-GMS were 75.5?±?3.82 % and 6.15?±?0.44%, respectively. The C-GMS presented a spherical shape and smooth surface with a mean particle diameter of 18.9 μm. The in vitro drug release behavior of C-GMS followed the first-order kinetics. The tissue distribution showed that the drug concentrations at lung tissue for the C-GMS suspension were significantly higher than those for the curcumin solution, and the Ce for lung was 36.19. Histopathological studies proved C-GMS was efficient and safe to be used as a passive targeted drug delivery system to the lung. Hence, C-GMS has a great potential for the targeted delivery of curcumin to the lung.     

Lung-targeted delivery system of curcumin loaded gelatin microspheres

The purpose of the study is to design and evaluate curcumin loaded gelatin microspheres (C-GMS) for effective drug delivery to the lung. C-GMS was prepared by the emulsification-linkage technique and the formulation was optimized by orthogonal design. The mean encapsulation efficiency and drug loading of the optimal C-GMS were 75.5?±?3.82 % and 6.15?±?0.44%, respectively. The C-GMS presented a spherical shape and smooth surface with a mean particle diameter of 18.9 μm. The in vitro drug release behavior of C-GMS followed the first-order kinetics. The tissue distribution showed that the drug concentrations at lung tissue for the C-GMS suspension were significantly higher than those for the curcumin solution, and the Ce for lung was 36.19. Histopathological studies proved C-GMS was efficient and safe to be used as a passive targeted drug delivery system to the lung. Hence, C-GMS has a great potential for the targeted delivery of curcumin to the lung.     

微针在儿童经皮递药中的研究进展

与传统的口服和肠外给药途径相比,经皮给药系统作为一种非侵入性替代方法非常有吸引力。特别对于儿童患者,它有助于克服该群体特有的问题,如吞咽困难、口服制剂的适口性以及与针头相关的恐惧和疼痛。然而,儿童的皮肤屏障功能有效地限制了药物的经皮吸收。微针可突破皮肤最外层的角质层,增加经皮给药的药量。过去几十年,以微针为基础药物输送系统的研究取得了显著进展。与微针相关的研究论文呈指数级激增。本文概括了微针的分类及特点,讨论了微针在儿童经皮递药中的研究进展,最后对微针介导的儿童经皮递药的未来前景进行了简要展望。     

SNEDDS curcumin formulation leads to enhanced protection from pain and functional deficits associated with diabetic neuropathy: An insight into its mechanism for neuroprotection

Curcumin has shown to be effective against various diabetes related complications. However major limitation with curcumin is its low bioavailability. In this study we formulated and characterized self nano emulsifying drug delivery system (SNEDDS) curcumin formulation to enhance its bioavailability and then evaluated its efficacy in experimental diabetic neuropathy. Bioavailability studies were performed in male Sprague Dawley rats. Further to evaluate the efficacy of formulation in diabetic neuropathy various parameters like nerve function and sensorimotor perception were assessed along with study of inflammatory proteins (NF-κB, IKK-β, COX-2, iNOS, TNF-α and IL-6). Nanotechnology based formulation resulted in prolonged plasma exposure and bioavailability. SNEDDS curcumin provided better results against functional, behavioural and biochemical deficits in experimental diabetic neuropathy, when compared with naive curcumin. Further western blot analysis confirmed the greater neuroprotective action of SNEDDS curcumin. SNEDDS curcumin formulation due to higher bioavailability was found to afford enhanced protection in diabetic neuropathy.From the Clinical EditorIn this study the authors formulated and characterized a self-emulsifying drug delivery system for formulation to enhance curcumin bioavailability in experimental diabetic neuropathy. Enhanced efficacy was demonstrated in a rat model.     

Eudragit® S100 coated calcium pectinate microspheres of curcumin for colon targeting

Currently, colon-specific drug delivery systems have been investigated for drugs that can exert their bioactivities in the colon. In this study, Eudragit? S100 coated calcium pectinate microsphere, a pH-dependent and enzyme-dependent system, as colon-specific delivery carrier for curcumin was investigated. Curcumin-loaded calcium pectinate microspheres were prepared by emulsification-linkage method, and the preparation technology was optimised by uniform experimental design. The morphology of microspheres was observed under scanning electron microscopy. Interactions between drug and polymers were investigated with differential scanning calorimetry (DSC) and X-ray diffraction. In?vitro drug release studies were performed in simulated colonic fluid in the presence of Pectinex Ultra SP-L or 1% (w/v) rat caecal content, and the results indicated that the release of curcumin was significantly increased in the presence of 1% (w/v) rat caecal contents. It could be concluded that Eudragit? S100 coated calcium pectinate microsphere was a potential carrier for colon delivery of curcumin.