Polyamino acids functionalized by hydrophobic grafts bearing an anionic charge and applications thereof, such as therapeutic applications
申请人:Breyne Olivier
公开号:US20100098656A1
公开(公告)日:2010-04-22
The present invention relates to novel materials based on biodegradable polyamino acids that are useful especially for the vectorization of active principle(s) (AP). The invention further relates to novel pharmaceutical, cosmetic, dietetic or phytosanitary compositions based on these polyamino acids. The object of the invention is to provide a novel polymer starting material that is capable of being used for the vectorization of AP and makes it possible on the one hand to achieve high polymer/AP ratios, and on the other hand optimally to satisfy all the specifications required in the case in point: biocompatibility, biodegradability, ability to associate easily with numerous active principles or to solubilize them, and ability to release these active principles in vivo. This object is achieved by the present invention, which relates first and foremost to linear polyamino acids comprising aspartic units or glutamic units and having hydrophobic grafts comprising hydrophobic groups containing from 8 to 30 carbon atoms, at least one of these hydrophobic grafts having at least one anionic charge and/or one or more mutually identical or different ionizable groups each capable of giving rise to at least one anionic charge. These polymers are amphiphilic and anionic and are capable of being converted easily and economically to particles for the vectorization of active principles, these particles themselves being capable of forming stable aqueous colloidal suspensions.
本发明涉及基于可生物降解的聚氨基酸的新材料,特别适用于活性成分的载体化。该发明还涉及基于这些聚氨基酸的新型药用、化妆品、饮食或植物保健组合物。本发明的目的是提供一种新型聚合物起始材料,能够用于活性成分的载体化,一方面实现高聚合物/活性成分比,另一方面能够最佳地满足所需的所有规格要求:生物相容性、可生物降解性、能够轻松与许多活性成分结合或溶解它们的能力,以及在体内释放这些活性成分的能力。本发明通过首先涉及含有天冬氨酸单元或谷氨酸单元并具有含有8至30个碳原子的疏水侧链的线性聚氨基酸来实现这一目的,其中至少一个这些疏水侧链具有至少一个阴离子电荷和/或一个或多个能够产生至少一个阴离子电荷的相互相同或不同的离子化基团。这些聚合物是两性和带负电荷的,能够轻松且经济地转化为用于活性成分载体化的颗粒,这些颗粒本身能够形成稳定的水胶体悬浮液。