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Sustained release liposome for pulmonary drug delivery

机译:缓释脂质体用于肺部药物输送

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Purpose: The objective of this study was to establish drug loaded liposome with sustained release property for pulmonary application. Methods: The drug for lung disease therapy (drug A) loaded liposome was prepared by ammonium ion gradient method. Physicochemical characteristics such as particle size and drug encapsulation efficiency were evaluated. The drug release profiles of the different formulation of liposomes were analyzed by dialysis method. Results: Loading of drug A into liposome of around 60% entrapment efficiency was achieved by an ammonium ion gradient method. Entrapment efficiency could be controlled by changing the lipid properties and incubation temperature on processing. The release profile of drug A from liposome prepared by this method exhibited the sustained release. The drug release pattern depended on the phase transition temperature of lipid and ammonium salt using preparation process of liposome. Surface modification with hydrophilic polymer prolonged the drugs releasing from liposome. Conclusion: These results indicate that drug A loaded liposome prepared by ammonium ion gradient method have a high potential for pulmonary delivery with sustained release property.
机译:目的:本研究的目的是建立具有缓释特性的载药脂质体,用于肺部应用。方法:采用铵离子梯度法制备载有肺疾病的脂质体药物(药物A)。评价了诸如颗粒大小和药物包封效率的理化特性。通过透析方法分析了不同脂质体制剂的药物释放曲线。结果:通过铵离子梯度法实现了将药物A装载到脂质体中的包封率约为60%。可以通过在加工过程中改变脂质特性和孵育温度来控制包封效率。通过该方法制备的药物A从脂质体的释放曲线显示出持续释放。在脂质体的制备过程中,药物的释放方式取决于脂质和铵盐的相变温度。用亲水聚合物进行的表面改性延长了药物从脂质体释放的时间。结论:这些结果表明,通过铵离子梯度法制备的载有药物A的脂质体具有较高的肺释放潜力,具有缓释特性。

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