Copolymer including uncharged hydrophilic block and cationic...

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 81/00 (2006.01) C08L 87/00 (2006.01) C08L 89/00 (2006.01)

Patent

CA 2718003

The present invention relates to a block copolymer containing an uncharged hydrophilic polymer chain block and a cationic polyamino acid chain block, wherein the hydrophilic polymer chain block is covalently bound to one end of the main chain of the polyamino acid chain block, and the hydrophobic group is covalently bound to the side chains of not less than 10% and not greater than 70% of amino acid repeating units in the polyamino acid chain block. This block copolymer forms a stable aggregate with siRNA, a small-molecule nucleic acid, under a physiological condition.

La présente invention concerne un copolymère séquencé comprenant un bloc de chaîne polymère hydrophile non chargé, et un bloc de chaîne de poly(acide aminé) cationique. Dans le copolymère, un bloc de chaîne polymère hydrophile est combiné avec une extrémité de l'une quelconque des chaînes principales du bloc de chaîne de poly(acide aminé) par liaison covalente, et un radical hydrophobe est combiné avec une chaîne latérale ayant de 10 à 70 motifs de répétition d'acide aminé dans le bloc de chaîne de poly(acide aminé) par liaison covalente. Le copolymère produit un agrégat stable avec l'ARNsi, un acide nucléique à petite molécule, dans des conditions physiologiques.

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