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    • 2. 发明授权
    • Stabilizing vitamin A derivatives by encapsulation in lipid vesicles formed with alkylammonium fatty acid salts
    • 通过包封在用烷基铵脂肪酸盐形成的脂质囊泡中来稳定维生素A衍生物
    • US06183774B2
    • 2001-02-06
    • US09375683
    • 1999-08-17
    • Duncan T. AustMichael A. RossJames M. WilmottJames A. Hayward
    • Duncan T. AustMichael A. RossJames M. WilmottJames A. Hayward
    • A61K9127
    • A61K9/1272
    • The present invention provides for vitamin A derivative selected from the group consisting of retinol, retinyl ester and any combination thereof incorporated into liposomes formed with alkylammonium fatty acid salts, and methods for manufacturing same. The liposomes of the invention may deliver vitamin A derivative materials at the occurrence of a preset triggering condition. Preferred liposomes of the invention are cationic liposomes. The preferred liposomes of the invention are formed with alkylammonium fatty acid salts, e.g., trialkylammonium fatty acid salts of long chain amides. The encapsulated vitamin A derivative is thus stabilized by the liposomes. The present invention thus also provides a method of stabilizing vitamin A derivative be encapsulation in such liposomes. The liposomes of the invention are used to provide topical skin treatment formulations useful in the treatment of skin.
    • 本发明提供了选自视黄醇,视黄酯以及与烷基铵脂肪酸盐形成的脂质体中的任意组合的维生素A衍生物及其制造方法。 本发明的脂质体可以在预设的触发条件发生时递送维生素A衍生物质。 本发明优选的脂质体是阳离子脂质体。 本发明优选的脂质体由烷基铵脂肪酸盐形成,例如长链酰胺的三烷基铵脂肪酸盐。 包封的维生素A衍生物因此被脂质体稳定。 因此,本发明还提供了一种将维生素A衍生物稳定化在这种脂质体中的方法。 本发明的脂质体用于提供用于治疗皮肤的局部皮肤治疗制剂。