Multi-arm polypeptide-poly(ethylene glycol) block copolymers...

C - Chemistry – Metallurgy – 08 – G

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C08G 81/02 (2006.01) A61K 9/51 (2006.01) A61K 47/34 (2006.01) A61K 47/48 (2006.01) C08G 65/329 (2006.01) C08G 83/00 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2508015

The invention provides a mufti-arm block copolymer for use in delivering a variety of bioactive agents. The copolymer of the invention contains a central core from which extend multiple (3 or more) copolymer arms. Each copolymer arm possesses an inner polypeptide segment and an outer hydrophilic polymer segment. Thus, the overall structure of the copolymer comprises an inner core region that includes the central core and the inner polypeptide segment, while the outer core region is hydrophilic in nature. The mufti-arm copolymer of the invention is particularly useful for delivery of biologically active agents that can be entrapped within the inner core region.

Copolymère séquencé à plusieurs bras destiné à être utilisé pour l'apport de toute une gamme d'agents bioactifs. Le copolymère selon la présente invention contient un noyau central à partir duquel s'étendent des bras copolymères multiples (3 ou plus). Chaque bras copolymère possède un segment polypeptide interne et un segment polymère hydrophile externe. Par conséquent, la structure globale du copolymère comprend une région centrale interne constituée du noyau central et du segment polypeptide interne, tandis que la région externe est de nature hydrophile. Le copolymère à bras multiples selon la présente invention est particulièrement utile pour apporter des agents biologiquement actifs qui peuvent être piégés dans la région centrale interne.

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