The present invention is a novel method for preparing liposomes, which solves the problem of easy oxidization, hydrolysis and changeability of drug preparation into some problems in the process of liposome, and for all kinds of drugs with high encapsulation efficiency. The preparation process includes the following steps: A, will be used for lipids and lipophilic substances to form liposome solution to form the oil phase solution in organic solvent (O); B, the entrapment of water-soluble substances dissolved in water to form aqueous solution (W); C, the two kinds of solution according to the appropriate the proportion of mixed and emulsified W / O emulsion (including microemulsion, reverse micelle); D, the W / O type emulsion freeze drying to remove solvent, obtained by freeze-drying product; E, will get the freeze-dried product of hydration, obtain liposome. The process is simple and easy to implement.
【技术实现步骤摘要】
本专利技术涉及生物医药
,确切地说它是一种新的脂质体(liposomes)(包括类脂体,niosomes)制备方法。
技术介绍
脂质体是由磷脂双分子层形成的闭合囊泡状结构。脂质体根据其结构的不同可以分为单层脂质体(unilamellar yesicles)、多层脂质体(multilamellar yesicles)和多囊脂质体(multivesicular liposomes)。脂质体由英国人Alec D. Bangham在1965年首先发现。此后,人们发现脂质体作为物质载体,尤其是药物载体,有着巨大的应用价值,于是便对脂质体进行了系统而广泛的研究。经过了二十多年的探索,科研人员已经提出了许多很有价值的脂质体制备方法。 目前脂质体主要通过分散技术(dispersion technique)制备,其方法可分为三大类1)以机械分散技术为基础。如薄膜分散法(film dispersion),即将用于形成脂质体的磷脂溶于有机溶媒中——通常是氯仿或氯仿和甲醇的混合物,之后在减压的条件下除去溶媒形成干燥的磷脂膜。将磷脂膜水化即可形成多层脂质体(multilamella ...
【技术保护点】
1.一种新的脂质体制备方法,其特征在于:a、将用于形成脂质体的脂类物质和待包封的亲脂性物质溶于有机溶剂形成油相(O),将待包封的亲水性物质溶于水形成内水相(W),将油相(O)、内水相(W)按合适的比例混合并乳化得到W/O型乳剂(包括微乳、反胶束);b、将得到的W/O型乳剂冷冻干燥除去溶媒得到冻干产物;c、将得到的冻干产物水化得到脂质体。
【技术特征摘要】
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