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作为一种抗阿米巴药物的二氯尼特糠酸酯的位点特异性递送增强。

Enhancement of site specific delivery of diloxanide furoate as an antiamoebic drug.

作者信息

Tiwari Vaibhav, Verma Shekhar, Verma Santosh K, Dangi Jawahar S

机构信息

Institute of Pharmaceutical Sciences, Guru Ghasidas Central University, Bilaspur, C. G., India.

SSTC-SSGI-Faculty of Pharmaceutical Science, Junwani, Bhilai, Chhattisgarh 490020, India.

出版信息

Eur J Pharm Sci. 2016 Apr 30;86:50-7. doi: 10.1016/j.ejps.2016.03.001. Epub 2016 Mar 4.

Abstract

The basic aim of the present research work is to deliver the diloxanide furoate (DF) at specific area using pectin microspheres. The microspheres were prepared by spray drying method and cross-linked by zinc acetate. Different concentrations of polymer (pectin 0.5-3%) and cross-linking agent (0-3% w/v in a mixture of ethanol:water) are taken to optimize the entrapment efficiency, swelling behavior, size and first 6h in-vitro release in simulated gastric fluids. Optimized formulation was characterized in the terms of in-vitro release, in-vivo drug disposition in various organs and in the blood of Sprague-Dawley albino rats and in-vivo gastrointestinal tract transit behavior using X-ray imaging method on albino rabbits. Findings suggested that microspheres containing a concentration of polymer (2% w/v) have average size of 100-500 μm, entrapment efficiency 85.82 ± 0.5 with swelling index 18.77 ± 5.21. In-vitro results and in-vivo gastric transit behavior (using X-ray imaging) have shown no release in first 3-6h that proved the colon specific delivery of DF. The results also suggested that the above approach have not only site specific delivery, but it improves the conversion of active drug by increasing the enzyme mediated hydrolytic degradation of DF due to the presence of polysaccharide polymer:water gel complex.

摘要

本研究工作的基本目的是使用果胶微球在特定区域递送二氯尼特糠酸酯(DF)。微球通过喷雾干燥法制备,并用醋酸锌交联。采用不同浓度的聚合物(果胶0.5 - 3%)和交联剂(在乙醇:水的混合物中为0 - 3% w/v)来优化包封率、溶胀行为、尺寸以及在模拟胃液中的前6小时体外释放。优化后的制剂通过体外释放、在Sprague-Dawley白化大鼠的各种器官和血液中的体内药物处置以及使用X射线成像方法对白化兔进行体内胃肠道转运行为来表征。研究结果表明,含有聚合物浓度为2% w/v的微球平均尺寸为100 - 500μm,包封率为85.82±0.5,溶胀指数为18.77±5.21。体外结果和体内胃转运行为(使用X射线成像)显示在最初3 - 6小时内无释放,这证明了DF的结肠特异性递送。结果还表明,上述方法不仅具有位点特异性递送,而且由于多糖聚合物:水凝胶复合物的存在,通过增加酶介导的DF水解降解来提高活性药物的转化率。

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