摘要:
Embodiments of the invention include devices and methods for the controlled elution of nucleic acid delivery complexes. In an embodiment, the invention includes a method of making a medical device. The method can include complexing nucleic acids with a carrier agent to form a delivery complex solution, applying the delivery complex solution to a substrate, and applying a polymeric solution to the substrate. In another embodiment, the invention includes a method of making a medical device including complexing nucleic acids with a carrier agent to form nucleic acid delivery complexes, combining the nucleic acid delivery complexes with a polymer solution and a cross-linking agent, wherein the cross-linking agent is positively charged or charge neutral. In an embodiment, the invention includes an implantable medical device including a substrate and a coating disposed on a surface of the substrate, the coating comprising a polymeric matrix and a plurality of disperse nucleic acid delivery complexes disposed within the polymeric matrix. Other embodiments are included herein.
摘要:
Embodiments of the invention include devices for the release of nucleic acids and related methods. In an embodiment, the invention includes an active agent eluting coating including a polymeric matrix, a cationic carrier agent disposed with the matrix, and an active agent disposed within the matrix, the active agent including nucleic acids substantially uncomplexed with the cationic carrier agent. In an embodiment, the invention includes a method of making an implantable medical device including selecting a concentration of a cationic carrier agent corresponding to a desired elution profile, combining a matrix forming polymer, an active agent, a solvent, and the cationic carrier agent to form a coating composition having the selected concentration of the cationic carrier agent, the active agent comprising nucleic acids, and depositing the coating composition onto the surface of a substrate. Other embodiments are included herein.
摘要:
Embodiments of the invention include devices and methods for the controlled elution of nucleic acid delivery complexes. In an embodiment, the invention includes a medical device including a substrate surface, a polymeric coating disposed on the surface, the polymeric coating coupled to the substrate surface through the reaction product of a photoreactive group; the polymeric coating comprising negatively charged species on the surface; and a plurality of nucleic acid delivery complexes disposed on the polymeric coating, the nucleic acid delivery complexes comprising a nucleic acid and a cationic carrier agent complexed to the nucleic acid. Other embodiments are included herein.
摘要:
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.
摘要:
Embodiments of the invention include devices and methods for delivery of nucleic acids as active agents. Embodiments of the invention include devices and methods for delivery of nucleic acids as active agents. In an embodiment, an article for delivering an active agent is included. The article can include a dehydrated complex including a nucleic acid, a transfection agent, and a saccharide protectant. The nucleic acid and transfection agent can form a liposome or a lipoplex. The dehydrated complex can be disposed within a polymeric matrix. The dehydrated complex can be disposed within a microparticle. Other embodiments are also included herein.
摘要:
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.
摘要:
Embodiments of the invention include particles with nucleic acid complexes, medical devices including the same and related methods. In an embodiment, the invention can include a method of making a medical device. The method can include contacting nucleic acids with cationic carrier agents to form nucleic acid complexes, adsorbing the nucleic acid complexes to porous particles to form nucleic acid complex containing particles, mixing the nucleic acid complex containing particles with a polymer solution to form a coating mixture, and applying the coating mixture to a substrate. In an embodiment, the method can include contacting nucleic acids with cationic carrier agents to form nucleic acid complexes, combining the nucleic acid complexes with a material to form nucleic acid complex containing particles in situ, mixing the nucleic acid complex particles with a polymer solution to form a coating mixture, and applying the coating mixture to a substrate. In an embodiment, the invention can include an implantable medical device including a substrate, an elution control matrix disposed on the substrate; a plurality of particles disposed within the elution control matrix, and a plurality of nucleic acid complexes disposed within the particles, the nucleic acid complexes comprising a nucleic acid and a cationic carrier agent. Other embodiments are included herein.