首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Microencapsulation of budesonide with dextran by spray drying technique for colon-targeted delivery: an in vitro I in vivo evaluation in induced colitis in rat
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Microencapsulation of budesonide with dextran by spray drying technique for colon-targeted delivery: an in vitro I in vivo evaluation in induced colitis in rat

机译:喷雾干燥技术将葡聚糖与葡聚糖微囊化用于结肠靶向递送:大鼠诱导性结肠炎的体外I体内评估

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摘要

The aim of this study was developing colon targeted-delivery of budesonide for ulcerative colitis. Microcapsules were prepared using spray drying technique by different drug-to-dextran ratios and three molecular weights (MWs) of polymer. Differential scanning calorimetry, X-ray diffraction (XRD), drug release and loading efficiency of microcapsules were studied. In vivo efficacy of the selected formulation prepared by 1:10 drug-to-polymer ratio and dextran with MW 500000 (D10M500) against acetic acid-induced colitis in rats was evaluated and compared to the control and reference groups (mesalasine and budesonide suspensions). The results showed that D10M500 microcapsules could target the drug to colon and its efficacy in reducing macroscopic damage score was higher than mesalasine suspension. Treatment with D10M500 decreased the scores of crypt damage and total colitis significantly compared to the control group which just received the vehicle and the groups treated with mesalasine and budesonide suspension which could not reduce the colitis parameters significantly.
机译:本研究的目的是开发布地奈德用于溃疡性结肠炎的结肠靶向递送。使用不同的药物与葡聚糖比例和三种分子量(MWs)的聚合物,采用喷雾干燥技术制备微胶囊。研究了差示扫描量热法,X射线衍射(XRD),药物释放和微胶囊的负载效率。评价了通过1:10药物/聚合物比和MW 500000(D10M500)的右旋糖酐制备的所选制剂对大鼠乙酸诱发的结肠炎的体内功效,并将其与对照组和参考组(美沙拉素和布地奈德混悬液)进行了比较。结果表明,D10M500微胶囊可以将药物靶向结肠,其降低宏观损伤评分的功效高于美沙拉素混悬液。与仅接受媒介物的对照组以及用美沙拉素和布地奈德混悬液治疗的组相比,用D10M500进行的治疗显着降低了隐窝损伤和总结肠炎的评分,而这些组不能显着降低结肠炎的参数。

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