Amphiphilic diblock, triblock and star-block copolymers and their pharmaceutical compositions
First Claim
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1. A therapeutic composition consisting of:
- an amphiphilic diblock, triblock or star-shaped block copolymer formed by a biodegradable polymer selected from the group consisting of a polyester, a polyamide, a poly(ester-amide), a polyanhydride and combinations thereof, being covalently attached at the polymer ends to at least one hydrophilic vinyl polymer by way of a divalent sulfur atom; and
an effective amount of at least one therapeutic agent;
wherein said therapeutic composition is characterized by its ability to form a nanodispersion or micelle in aqueous media.
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Abstract
This invention relates to novel amphiphilic diblock, triblock copolymers and star-shaped block copolymers comprising a biodegradable polymer covalently attached at the polymer ends, to a hydrophilic vinyl polymer, via divalent sulfur atom; to a process for producing the block polymers; to a polymerization process which comprises subjecting the monomers capable of radical polymerization to radical polymerization in the presence of a macromolecular biodegradable chain-transfer agent; and to pharmaceutical compositions comprising the block copolymers loaded with therapeutic agents.
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Citations
8 Claims
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1. A therapeutic composition consisting of:
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an amphiphilic diblock, triblock or star-shaped block copolymer formed by a biodegradable polymer selected from the group consisting of a polyester, a polyamide, a poly(ester-amide), a polyanhydride and combinations thereof, being covalently attached at the polymer ends to at least one hydrophilic vinyl polymer by way of a divalent sulfur atom; and an effective amount of at least one therapeutic agent; wherein said therapeutic composition is characterized by its ability to form a nanodispersion or micelle in aqueous media. - View Dependent Claims (2, 5, 6, 8)
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3. A therapeutic composition consisting of:
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an amphiphilic diblock, triblock or star-shaped block copolymer formed by a biodegradable polymer selected from the group consisting of a polyester, a polyamide, a poly(ester-amide), a polyanhydride and combinations thereof, being covalently attached at the polymer ends to at least one hydrophilic vinyl polymer by way of a divalent sulfur atom; and an effective amount of at least one therapeutic agent; and
at least one targeting moiety conjugated to pendant functional groups in said at least one hydrophilic vinyl polymer;wherein said therapeutic composition is characterized by its ability to form a nanodispersion or micelle in aqueous media. - View Dependent Claims (4, 7)
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Specification