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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Simvastatin nanoemulsion for improved oral delivery: design, characterisation, in vitro and in vivo studies
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Simvastatin nanoemulsion for improved oral delivery: design, characterisation, in vitro and in vivo studies

机译:辛伐他汀纳米乳剂改善口服递送:设计,表征,体外和体内研究

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摘要

Simvastatin is poorly bioavailable as it is practically insoluble in water and shows dissolution rate-limited absorption. Therefore, the present study was aimed at preparing nanoemulsion (NE) of simvastatin for improving its solubility and/or dissolution rate for enhancing its bioavailability. The NEs were evaluated for particle size (PS), zeta potential, transmission electron microscopy (TEM), viscosity, in vitro release and stability studies. The optimised NE showed PS of 132 ± 9nm and zeta potential of 17.1 ±1.2mV. TEM studies demonstrated spherical shape and size of the globules. In vitro release studies showed increased dissolution rate of NE compared with plain drug (PD). Pharmacokinetic studies showed relative bioavailability of simvastatin NE was 369.0% with respect to PD suspension. Pharmacodynamic studies conducted in hyperlipidemic rats showed that significant decrease in the total cholesterol and triglyceride levels for NE as compared with PD proving improvement in bioavailability. In conclusion, NE has great potential for improving bioavailability of poorly water-soluble drugs like simvastatin.
机译:辛伐他汀的生物利用度差,因为它实际上不溶于水并且显示出溶解速率受限的吸收。因此,本研究旨在制备辛伐他汀的纳米乳剂(NE),以改善其溶解度和/或溶解速率,以提高其生物利用度。对NE进行了粒度(PS),ζ电势,透射电子显微镜(TEM),粘度,体外释放和稳定性研究的评估。优化的NE显示PS为132±9nm,ζ电位为17.1±1.2mV。 TEM研究表明球的球形和大小。体外释放研究表明,与普通药物(PD)相比,NE的溶出度增加。药代动力学研究表明,相对于PD悬浮液,辛伐他汀NE的相对生物利用度为369.0%。在高脂血症大鼠中进行的药效学研究表明,与PD相比,NE的总胆固醇和甘油三酯水平显着降低,证明其生物利用度得到改善。总之,NE具有改善难溶性药物(如辛伐他汀)的生物利用度的巨大潜力。

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