Targeted delivery via biodegradable polymers
First Claim
1. A method for locally delivering a biologically active molecule to a site in the vascular system where treatment is needed to promote vascularization or revascularization of a tissue, the method comprising:
- a) selecting a biodegradable covalently polymerizable material, b) mixing a biologically active molecule with the material, wherein the biologically active molecule is effective to promote vascularization or revascularization of the tissue, c) applying the material to the site where treatment is needed, and d) covalently polymerizing the material to permit controlled release of a therapeutically effective amount of the biologically active molecule.
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Abstract
Delivery of bioactive molecules such as nucleic acid molecules encoding a protein can be significantly enhanced by immobilization of the bioactive molecule in a polymeric material adjacent to the cells where delivery is desired, where the bioactive molecule is encapsulated in a vehicle such as liposomes which facilitates transfer of the bioactive molecules into the targeted tissue. Targeting of the bioactive molecules can also be achieved by selection of an encapsulating medium of an appropriate size whereby the medium serves to deliver the molecules to a particular target. For example, encapsulation of nucleic acid molecules or biologically active proteins within biodegradable, biocompatible polymeric microparticles which are appropriate sized to infiltrate, but remain trapped within, the capillary beds and alveoli of the lungs can be used for targeted delivery to these regions of the body following administration to a patient by infusion or injection.
64 Citations
11 Claims
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1. A method for locally delivering a biologically active molecule to a site in the vascular system where treatment is needed to promote vascularization or revascularization of a tissue, the method comprising:
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a) selecting a biodegradable covalently polymerizable material, b) mixing a biologically active molecule with the material, wherein the biologically active molecule is effective to promote vascularization or revascularization of the tissue, c) applying the material to the site where treatment is needed, and d) covalently polymerizing the material to permit controlled release of a therapeutically effective amount of the biologically active molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification