辅酶Q10纳米乳液的制备以及性能研究

为了实现CoQ10在皮肤组织有效地递送,采用高压均质法制备运载CoQ10的纳米乳液(CoQ10-NES),通过响应面分析对CoQ10-NES的制备工艺进行了优化,并对其物理特性、抗氧化活性、生物相容性、经皮吸收以及贮藏和光照稳定性进行了考察.结果 表明,CoQ10-NES粒径大小均一,平均粒径和电位分别为(106.1±...     

纳米结构脂质载体肺部给药研究进展

传统吸入疗法不能使药物靶向到肺的特定部位,而纳米载体药物的肺部给药系统可克服传统吸入药物的不足。其中纳米结构脂质载体是固体和液体脂质的混合物经表面活性剂乳化后形成的纳米粒,具有更好的胶体稳定性和持续的药物释放行为。其组成成分具有无毒、生理惰性和生物相容性的特点,还具有良好的雾化特性,特别适用于肺部应用,并且生产过程简单（高压均质）,适合大规模生产。本文介绍了常见肺部给药纳米载体,概述了纳米结构脂质载体应用于肺部的优势,为其在肺部给药领域中的深度开发提供参考。     

利福布汀纳米结构脂质载体的制备工艺及体外评价

目的:将利福布汀(rifabutin,RFB)制成利福布汀纳米结构脂质载体(RFB-NLC),提高其水溶性、缓释性.方法:首先进行RFB含量测定方法学考察,以乳化剂用量、药物与脂质用量比、固液脂质用量比为处方因素,以包封率和载药量为指标,单因素考察基础上,以Box-Behnken效应面法进行处方优化,采用差式扫描量热法...     

纳米结构脂质载体用于肺靶向递送体系研究进展

目的 为肺部疾病的治疗和难溶性药物替代制剂的研发提供参考。方法 总结纳米结构脂质载体（NLC）的基本类型、制备方法及在肺部疾病治疗中应用的研究进展,并探讨其提高肺部相关疾病治疗有效性和安全性的效果。结果 NLC包括无定型、不完全晶体型、多重结构型3种形态,制备方法包括高压均质法、溶剂分散法、熔融乳化-超声法、乳微法等;NLC可使药物活性成分更易被包载,储存中药物外泄减少,物理稳定性更好,能控制药物靶向释放,提高难溶性药物的饱和溶解度;一定程度上降低给药频率,减少给药剂量和减弱不良反应。结论 NLC为基于脂质纳米粒上开发的一种新型药物传递系统,其载体药物经肺部吸入给药,特别适用于肺部疾病的治疗,是口服和静脉给药途径较有潜力的替代方案。     

辅酶Q10亚微乳注射剂的制备及其性质研究

目的对静脉注射用辅酶Q10亚微乳剂的处方工艺进行研究,并对其体外理化性质进行考察。方法以乳剂粒径、稳定常数为评价指标,采用正交设计对制剂处方进行优化,用高压均质法制备辅酶Q10亚微乳。结果按照优化的处方工艺制备的辅酶Q10亚微乳平均粒径为(176.4±15.2)nm,zeta电位为(-35.93±8.13)mV,40℃下考察6个月,理化性质稳定。结论该处方工艺可行,所制备的辅酶Q10静脉注射亚微乳剂具有较高稳定性,解决了辅酶Q10的水溶性问题。     

纳米结构脂质载体在脑靶向传递体系的研究进展

随着全球环境不断恶化以及社会老龄化程度不断加深,中枢神经系统疾病已经成为社会关注的热点话题,而血脑屏障是治疗多种中枢神经系统疾病的主要障碍。纳米技术已被证明有效用于脑靶向的治疗,而纳米结构脂质载体是一种极具发展前景的新型纳米载体给药系统。通过查阅近年来的相关文献,本文介绍了纳米结构脂质载体和血脑屏障的结构特点,总结了药物透过血脑屏障的评价方法,并对纳米结构脂质载体在治疗中枢神经系统疾病中的应用进行综述。笔者对近年来纳米结构脂质载体在脑靶向传递体系的研究进展进行归纳和总结,同时对其发展前景进行展望,以期为今后纳米结构脂质载体用于中枢神经系统疾病的临床治疗提供更理想的治疗方案,为更深层次的理论研究和机制探索开拓思路。     

固体脂质纳米粒和纳米结构脂质载体在经皮给药系统中的研究进展

目的介绍固体脂质纳米粒和纳米结构脂质载体在经皮给药系统中的应用与优势,为其开发利用提供参考。方法查阅国内外相关文献共30余篇,从固体脂质纳米粒和纳米结构脂质载体用于经皮给药系统的优势、药物在固体脂质纳米粒和纳米结构脂质载体中的分布形式及固体脂质纳米粒和纳米结构脂质载体在经皮给药领域中的应用等方面进行综述。结果固体脂质纳米粒和纳米结构脂质载体可以增强药物稳定性,能在皮肤表面产生包封效应,增加皮肤水合作用,具有药物靶向性。结论固体脂质纳米粒和纳米结构脂质载体是极有发展前景的新型经皮给药系统。     

辅酶Q10静脉注射乳的制备及其体外释放研究

目的制备辅酶Q10静脉注射乳,并研究其体外释放行为。方法对处方组成进行响应面优化,确定最佳处方。用激光粒度仪测定乳剂粒径、Zeta电位,透射电镜观察乳滴形态,初步考察乳剂稳定性及体外释放行为。结果油水比与磷脂用量对其稳定性系数Ke的影响较大,采用最佳处方制备的乳剂平均粒径为172±19.2 nm,Zeta电位为-33.1±2.9 m V。体外药物的释放试验中,反透析法比透析法稍快。结论所制备的辅酶Q10静脉注射乳质量可控,稳定性良好,具一定缓释作用。     

辅酶Q10脂质体的制备及质量考察

目的制备辅酶Q10脂质体,并考察其性质.方法采用乙醇注入法制备辅酶Q10脂质体,正交设计优化处方,采用滤膜过滤分离-HPLC法测定脂质体包封率,并测定其Zeta电位和粒径,考察其稳定性.结果按正交设计最优组合制备的脂质体含药量为1.93 g·L-1,包封率为99.2%,Zeta电位为-31.2 mV,平均粒径为163 nm.结论乙醇注入法制得的辅酶Q10脂质体包封率高,粒径小而均一,稳定性较好.     

纳米结构脂质载体的制备与应用研究进展

此文综述了纳米结构脂质载体的制备方法与应用的最新研究进展,为其进一步研究提供参考。     

Coenzyme Q10 and retinaldehyde co-loaded nanostructured lipid carriers for efficacy evaluation in wrinkles

This study depicts coenzyme Q10 (CoQ10) and retinaldehyde (RAL) co-loaded nanostructured lipid carriers (NLCs); having activity on different targets of photoageing, which can overcome deficits of conventional topical dosage forms. The developed NLCs were characterised for particle size, polydispersity index and percent entrapment efficiency (%EE), followed by their incorporation into Carbopol^® 934?P-NF gel. In vitro cellular uptake and cytotoxicity assay was performed to evaluate NLCs and in vivo study on ultraviolet- (UV) induced wrinkle model to determine efficacy of NLCs. The developed stable, homogenous and spherical NLCs with size range of 200–230?nm and more than 80 %EE, showed prolonged, biphasic in vitro release pattern for CoQ10 and RAL. Ex vivo study portrayed negligible permeation through skin but appreciable penetration and distribution in skin layers. This has shown good uptake of both drugs with least cytotoxicity in cell culture studies. In vivo irritation study on Sprague Dawley (SD) rats and pharmacodynamic study on female Swiss albino mice proved it less irritant and efficacious. The developed NLCs thus hold promise in the efficient management of wrinkle and their reduction as indicated by the data obtained.     

YSA肽修饰的纳米结构脂质载体的制备及表征

目的本研究作者旨在制备载siRNA的YSA肽修饰的纳米结构脂质载体(siRNA/YSA-NLC)并对其进行表征。方法通过YSA与DSPE-PEG_(2000)-Mal发生反应生成DSPE-PEG_(2000)-YSA;采用熔融-超声法制备NLC;以合成的DSPE-PEG_(2000)-YSA对NLC进行表面修饰,制得YSA-NLC,与siRNA复合,制备siRNA/YSA-NLC复合物。采用MCF-7细胞对DSPE-PEG_(2000)-YSA的用量进行筛选,并对优化后的siRNA/YSA-NLC进行表征。结果 DSPE-PEG_(2000)-YSA在NLC中的用量为6%;siRNA/YSA-NLC的粒径为(114.26±11.35)nm,多聚分散度(PDI)为(0.287±0.043),Zeta电位为(6.16±2.79)mV,包封率为(82.31±2.41)%;在4～8℃条件下放置30 d,粒径、PDI和Zeta电位无明显变化;YSA-NLC对siRNA具有良好的保护作用,在血浆中24 h内仍能保持稳定。结论选定和制备了具有良好体外理化性质和瘤靶向能力的YSA-NLC递送siRNA。     

新型纳米结构脂质载体系统的研究进展

目的介绍新型的纳米结构脂质载体系统的研究进展,为其研究和应用提供参考。方法查阅相关文献33篇,进行整理和归纳。结果新型的纳米结构脂质载体能够克服固体脂质纳米粒的一些不足,并具有独特的结构特征,药物的包封机理和释放特征。结论纳米结构脂质载体作为药物传递系统的一种新剂型,具有广阔的发展前景。     

用Doehlert设计优化辅酶Q_(10)纳米粒的处方和制备工艺

目的更好地指导处方设计。方法采用纳米沉淀法制备辅酶Q10纳米粒;以粒径、载药量、包封率及总评优化值为指标,评价纳米粒的质量;采用Doehlert设计安排试验,考察稳定剂维生素E琥珀酸聚乙二醇酯(vitamin E polyethylene glycol 1000 succinate,TPGS)质量分数、聚乳酸-羟基乙酸共聚物(poly lactic-co-glycolic acid,PLGA)质量浓度、PLGA与药物质量比、水相与有机相体积比对制备工艺的影响,并对结果分别进行多元线性回归和二项式方程拟合,预测最佳工艺条件。结果各指标的二项式拟合方程均优于多元线性回归方程,按优化条件制备的样品平均粒径为(130.7±5.8)nm,载药量为(8.80±0.15)%,包封率为(87.99±1.49)%,与预测值偏差均小于10%。结论Doehlert设计较好地完成了辅酶Q10纳米粒的多目标同步优化,所建立的数学模型预测性良好。     

Cyproterone acetate-loaded nanostructured lipid carriers: effect of particle size on skin penetration and follicular targeting

Cyproterone acetate (CPA) is used to treat various skin disorders such as acne, hirsutism, and alopecia. Due to the limited skin penetration of CPA, nanostructured lipid carriers (NLCs) with different size ranges were considered in this study in order to enhance skin penetration and to target hair follicles. Drug loading, drug release and morphological assessment were evaluated for each targeted size (100, 300, and 600?nm). Ex vivo skin penetration was also investigated using Franz diffusion cells. Finally, in vivo follicular targeting was evaluated using rhodamine B-loaded micro and nanoparticles. Results revealed that 60–85% of drug was slowly released from lipid nanoparticles within 72?h. CPA-NLC with average diameter of 600?nm had better penetration and deposition in dermis-epidermis layer, also CPA-NLC 100 and 300?nm significantly increased drug penetration in dermis-epidermis in comparison to free CPA. Follicular targeting results revealed that NLC 300?nm had the best accumulation capacity in hair follicles. CPA-NLC with average diameter of 300?nm could be a promising topical novel drug delivery system for specific targeting of hair follicles and sebaceous glands to treat androgenic skin disorders such as acne, hirsutism, and alopecia.     

In vivo studies on the oridonin-loaded nanostructured lipid carriers

Oridonin (ORI)-loaded Nanostructured lipid carriers (NLC) were prepared by emulsion–evaporation and low temperature–solidification technique, and evaluated for morphological observation, particle size, zeta potential and in vitro drug release. Next, the characteristics of biodistribution and pharmacokinetics in vivo were examined. The average particle size of resultant NLC was 245.2?nm and the zeta potential was found to be -38.77 mV. The in vivo characteristics of ORI-loaded NLC were studied after intravenous administration using Kunming strain mice as experimental animals. An ORI control solution was studied parallelly. In tested organs, the distribution of ORI-loaded NLC to liver was higher than that of free drug. ORI-loaded NLC showed higher AUC (area under tissue concentration–time curve) values and circulated in the blood stream for a longer time compared with ORI solution. These results support the potential applications of NLC for the delivery of ORI.     

In vivo studies on the oridonin-loaded nanostructured lipid carriers

Oridonin (ORI)-loaded Nanostructured lipid carriers (NLC) were prepared by emulsion-evaporation and low temperature-solidification technique, and evaluated for morphological observation, particle size, zeta potential and in vitro drug release. Next, the characteristics of biodistribution and pharmacokinetics in vivo were examined. The average particle size of resultant NLC was 245.2?nm and the zeta potential was found to be -38.77 mV. The in vivo characteristics of ORI-loaded NLC were studied after intravenous administration using Kunming strain mice as experimental animals. An ORI control solution was studied parallelly. In tested organs, the distribution of ORI-loaded NLC to liver was higher than that of free drug. ORI-loaded NLC showed higher AUC (area under tissue concentration-time curve) values and circulated in the blood stream for a longer time compared with ORI solution. These results support the potential applications of NLC for the delivery of ORI.