Abstract:
The invention provides an injectable formulation that includes an active agent; a biocompatible solvent system, crosslinkable polymers such as polysaccharides; and crosslinking agents; wherein the formulation is substantially free of water. The invention also provides a drug delivery depot formed from the injectable formulation wherein the polymers crosslink in the presence of water in the body of a patient, or in the air, prior to implantation in the patient. Also provided are methods of treatment using such formulations and drug delivery systems.
Abstract:
Silane-functionalized hydrophobic α(1→4)glucopyranose polymers and polymeric matrices are described. Biodegradable matrices can be formed from hydrophobic α(1→4)glucopyranose polymers with reactive pendent silyl ether groups. Reaction of the silyl ether groups provides improved matrix formation through bonding to a device surface of a device, polymer-polymer crosslinking, or both. Biodegradable matrices can be used for the preparation of implantable and injectable medical devices, including those that release a bioactive agent.
Abstract:
Embodiments of the invention include devices and methods for the release of nucleic acid complexes. In an embodiment the invention includes a nucleic acid delivery particle. The delivery particle can include a polymeric matrix including a polyethyleneglycol containing copolymer and a nucleic acid complex disposed within the polymeric matrix. The nucleic acid complex can include a nucleic acid and a carrier agent. In an embodiment the invention includes a medical device including a first polymeric matrix comprising a first polymer and a plurality of nucleic acid delivery particles disposed within the first polymeric matrix. The medical device can be configured to release the nucleic acid complex when the medical device is implanted within a subject. Other embodiments are included herein.