首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到19条相似文献,搜索用时 46 毫秒
1.
紫衫醇是具有良好抗癌活性的天然药物。但由于极差的水溶性,大大地限制了它在临床上的应用。为此开发适宜的紫衫醇给药系统成为紫杉醇大规模应用的关键。本文综述了紫衫醇给药的最新进展,归纳了几种给药的途径,为紫杉醇给药系统的研究提供了一些线索。  相似文献   

2.
改性聚乳酸-聚乙二醇——多西紫杉醇给药系统的制备   总被引:1,自引:0,他引:1  
通过丙交酯与氨基碳酸脂共聚来改善聚乳酸的活性,再利用改性后的活性氨基与聚乙二醇接枝共聚来改善聚乳酸的亲水性,将两亲接枝共聚物作为药物载体材料,采用溶剂-反溶剂法制备载有疏水性抗癌药物多西紫杉醇的聚合物纳米粒子,纳米颗粒的尺寸约100 nm。  相似文献   

3.
通过丙交酯与氨基碳酸脂共聚来改善聚乳酸的活性,再利用改性后的活性氨基与聚乙二醇接枝共聚来改善聚乳酸的亲水性,将两亲接枝共聚物作为药物载体材料,采用溶剂-反溶剂法制备载有疏水性抗癌药物多西紫杉醇的聚合物纳米粒子,纳米颗粒的尺寸约100 nm。  相似文献   

4.
透析法制备紫杉醇聚合物胶束给药系统   总被引:6,自引:0,他引:6       下载免费PDF全文
以4-二甲氨基吡啶(DMAP)和二环己基碳二亚胺(DCC)作催化剂和缩合剂,合成聚乙二醇-共轭亚油酸(PEG-CLA)聚合物;以PEG-CLA为载体,采用透析法制备了紫杉醇聚合物胶束给药系统;利用动态光散射法(DLS)、透射电镜(TEM)、X-射线光电能谱(XPS)表征了紫杉醇胶束的粒径与粒径分布、形貌以及表面组分特性,分别在pH值为7.4的磷酸盐缓冲溶液(PBS)和1 mol/L水杨酸钠溶液中进行了紫杉醇胶束的体外药物释放试验。研究结果表明,所制备的紫杉醇胶束外形大致呈球状,粒径在100 nm左右,且粒径分布较窄。X-射线光电能谱显示,胶束表面没有吸附紫杉醇。在体外药物释放实验中,发现水杨酸钠对紫杉醇的释放起促进作用。  相似文献   

5.
张翠央  刘进兵  刘圳  郭照辉  雷平 《安徽化工》2021,47(5):11-15,21
姜黄素具有抗炎、抗癌、抗氧化及抗纤维化等多种药理作用.主要从三个方面展开综述:近年来姜黄素衍生物的合成及抗癌活性研究进展;近年来姜黄素新型递药系统的研究进展;姜黄素辅助用于临床抗癌联合用药的应用研究.  相似文献   

6.
介绍了透皮给药系统的特点、剂型、促渗技术和体内外研究模型,为透皮给药系统的研究提供参考。重点查阅了国外有关透皮给药系统的相关文献并进行分析总结。随着新材料、新技术、新设备的不断发展,促渗方法取得了很大的进步,透皮给药系统具有广阔的发展前景。  相似文献   

7.
脂质体载药系统经皮给药的研究进展   总被引:5,自引:0,他引:5  
脂质体是一类具有特殊性质的磷脂,近几年已开始被广泛用作多种药物的载体。药物经皮给药系统是药剂学中的一新兴的领域,通过脂质体包埋技术制备的各种经皮给药系统同样在我国的制药和化妆品行业得到广泛应用。通过对脂质体的组成及一般特性、脂质体载药系统经皮给药的药剂学促透机制和最新的基础实验和应用研究进展的综合分析后显示,脂质体包裹技术在国内相关领域中的应用将具广阔的前景。  相似文献   

8.
紫杉醇聚合物胶束载药体系的研究进展   总被引:1,自引:0,他引:1  
紫杉醇(paclitaxel,PTX)是一种常用的抗肿瘤药物,但其极差的水溶性限制了其在临床上的应用。为使其能更好的为人体所利用,近年来,研究者们开发了多种紫杉醇载药体系,其中聚合物胶束载药体系以其特有的优点为目前研究的热点,并具有广阔的发展前景。介绍了近年来采用两亲嵌段共聚物制备紫杉醇聚合物给药体系的研究进展。展望了该体系今后的发展方向。  相似文献   

9.
缓控释制剂给药系统的研究进展   总被引:1,自引:0,他引:1  
刘朋朋  季金苟 《河北化工》2007,30(12):14-17
就现存的缓控释制剂给药系统做了综合的概述和评价,总结了近年来有关的应用研究进展,同时对其发展趋势与应用前景做了展望.  相似文献   

10.
口服结肠靶向给药系统和制备方法的研究进展   总被引:6,自引:2,他引:4       下载免费PDF全文
吴庆喜  姚善泾 《化工学报》2013,64(1):210-222
口服结肠靶向给药系统作为第四代药物剂型的发展和应用,具有靶向定位性、可提高局部药物浓度、直接作用于病变部位、降低药物剂量、减少副反应等优点,因而备受研究者的关注。本文针对口服结肠靶向给药系统的给药机理、应用和制备技术,综述了该领域近些年来的研究进展,为系统研究口服结肠靶向给药系统提供理论依据和参考。  相似文献   

11.
    
Chemotherapy is still the most direct and effective means of cancer therapy nowadays. The proposal of drug delivery systems (DDSs) has effectively improved many shortcomings of traditional chemotherapy drugs. The technical support of DDSs lies in their excellent material properties. Polysaccharides include a series of natural polymers, such as chitosan, hyaluronic acid, and alginic acid. These polysaccharides have good biocompatibility and degradability, and they are easily chemical modified. Therefore, polysaccharides are ideal candidate materials to construct DDSs, and their clinical application prospects have been favored by researchers. On the basis of versatile types of polysaccharides, this review elaborates their applications from strategic design to cancer therapy. The construction and modification methods of polysaccharide-based DDSs are specifically explained, and the latest research progress of polysaccharide-based DDSs in cancer therapy are also summarized. The purpose of this review is to provide a reference for the design and preparation of polysaccharide-based DDSs with excellent performance.  相似文献   

12.
聚谷氨酸是生物可降解的高分子材料,作为新型药物载体具有广泛的用途。综述了聚谷氨酸及其衍生物在改善药物的水溶性、降低毒性、控制药物释放以及提高药物靶向性等方面的研究,为药物新剂型的开发提供参考。  相似文献   

13.
Sols of starches have been reported to form phase-separated systems when mixed with the gelatin solution. This has been attributed to the thermodynamic incompatibility of the starch-gelatin systems. The current work has been designed to study the effect of processed starches on the properties of the gelatin-starch based phase-separated physical hydrogels. The hydrogels were prepared using corn starch, soluble starch and boiled starch. The hydrogels were characterized by FTIR spectroscopy, thermal studies, textural studies and impedance spectroscopy. Metronidazole was incorporated within the hydrogels. The drug-loaded gels have shown good antimicrobial activity against Escherichia coli and Bacillus subtilis.  相似文献   

14.
    
It has been recently proven that xylooligosaccharides (XOS) with prebiotic properties have diverse beneficial biological effects including immunomodulatory and antitumor activities. The present article focused on the chemical and biological evaluation of corn-derived commercially available XOS and aimed to elucidate their cytotoxicity and inhibitory potential against tumor cells. Spectrophotometric chemical analyses, Fourier transform infrared spectroscopy, and high-performance liquid chromatography analyses were performed. Antioxidant activity was determined by measuring the oxygen radical absorbance capacity and hydroxyl radical averting capacity. In vitro cytotoxicity assays with human cell lines derived from normal and tumor tissues, assessments of ATP production, mitochondrial membrane potential specific staining, cytokine assays, and molecular docking were used to evaluate the biological activity of XOS. The sample showed significant antioxidant activity, and it was determined that most xylose oligomers in it are composed of six units. XOS exhibited antitumor activity with pronounced inhibitory effect on lysosomes, but mitochondrial functionality was also affected. The production of proinflammatory cytokines by lipopolysaccharide-stimulated U-937 cells was reduced by XOS treatment, which suggested the involvement of Toll-like receptor 4 (TLR4)-mediated signaling in the mechanism of XOS action. Molecular docking analyses confirmed the potential inhibitory interaction between the sample and TLR4. In addition, XOS treatment had significant tumor-cell-specific influence on the glutathione antioxidant system, affecting its balance and thus contributing to the inhibition of cellular viability. The present study elucidated the tumor-inhibitory potential of commercially available XOS that could be utilized in pharmaceutical and food industry providing disease-preventive and therapeutic benefits.  相似文献   

15.
16.
    
The rapid progression in biomaterial nanotechnology apprehends the potential of non-toxic and potent polysaccharide delivery modules to overcome oral chemotherapeutic challenges. The present study is aimed to design, fabricate and characterize polysaccharide nanoparticles for methotrexate (MTX) delivery. The nanoparticles (NPs) were prepared by Abelmoschus esculentus mucilage (AEM) and chitosan (CS) by the modified coacervation method, followed by ultra-sonification. The NPs showed much better pharmaceutical properties with a spherical shape and smooth surface of 213.4–254.2 nm with PDI ranging between 0.279–0.485 size with entrapment efficiency varying from 42.08 ± 1.2 to 72.23 ± 2.0. The results revealed NPs to possess positive zeta potential and a low polydispersity index (PDI). The in-vitro drug release showed a sustained release of the drug up to 32 h with pH-dependence. Blank AEM -CS NPs showed no in-vivo toxicity for a time duration of 14 days, accompanied by high cytotoxic effects of optimized MTX loaded NPs against MCF-7 and MD-MBA231 cells by MTT assay. In conclusion, the findings advocated the therapeutic potential of AEM/CS NPs as an efficacious tool, offering a new perspective for pH-responsive routing of anticancer drugs with tumor cells as a target.  相似文献   

17.
    
A novel vector for gene delivery was synthesized. Here the ovalbumin (OVA) acts as a core and low‐molecular‐weight PEI600 was grafted to its surface. The finally product was characterized (1H‐NMR, UV, and TGA) and its biophysical properties such as DNA condensing, particle size, and zeta potential were determined. The agarose gel assay indicated that OVA‐PEI600 could efficiently condense plasmid DNA. Its particle size was about 150 nm and zeta potential was around +20 mV. The MTT assay showed that the cytotoxicity of OVA‐PEI600 was less than PEI25 kDa. Its transfection efficiency in SKOV‐3 and HepG2 cell lines was higher than that of PEI600 and comparable to PEI25 kDa. In vivo, luciferase activity could be tested in liver, spleen, kidney, lung, and blood serum, respectively, in mice. The core‐shell structure of OVA‐PEI600 provided a novel strategy for nonviral gene delivery. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009  相似文献   

18.
水溶性壳聚糖纳米粒子的制备及其BSA载药性能   总被引:3,自引:0,他引:3  
王春  杨连生  扶雄 《化工进展》2006,25(12):1431-1435
为了避免高分子量壳聚糖水溶性差以及增溶剂乙酸可能带来的负面作用,本文选择低分子量水溶性壳聚糖 (WSC)作研究对象,采用三聚磷酸(TPP)作交链剂制备不同WSC/TPP比率的WSC纳米粒子,并用于牛血清白蛋白 (BSA)的释放载体。经测得为球形形貌的纳米粒子空载和载药时粒径、Zeta电位分别在35~190 nm、35~42 mV。红外光谱及X–射线衍射证实了纳米粒子中WSC的氨基与TPP的磷酸基团发生了交联反应。纳米粒子载药性能试验表明在0.05~1 mg/mL范围内随着BSA浓度的增大,纳米粒子的载药量增加而负载率降低。体外释放实验表明水溶性壳聚糖纳米载体对蛋白质药物具有缓释特征。因此,水溶性壳聚糖有望成为新的载体应用于蛋白质药物的控制释放。  相似文献   

19.
《Progress in Polymer Science》2014,39(12):1987-2009
Currently, most of administered anti-cancer drugs are low molecular weight compounds (as compare to polymers) and hydrophobic in nature. Such small molecular anti-cancer drugs possess fast clearance rate from the blood circulating system and have toxic side effects. Poly(organophosphazenes) have wide range of biomedical applications owing good biocompatibility, sustainability and degradability into non-toxic by-products. So, in this review, we have carefully selected such poly(organophosphazenes), which proved to be good anti-cancer drug carriers because of overcoming crucial issues related to the administration of anti-cancer drugs i.e. poor hydrophilicity, lack of cancer cells specificity, and fast clearance rate from blood circulating system. Thence, the main focus of this review is to highlight the advancement that have been achieved in the synthesis of poly(organophosphazenes) and their application in anti-cancer drug delivery system (DDS).  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号