Nucleic Acid-Encapsulated Particles in Ethylene Vinyl Acetate Copolymer Matrices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for delivering nucleic acid-encapsulated lipid particles face challenges in achieving controlled and sustained release due to the low melting point of lipids, which complicates their incorporation into conventional medical devices and leads to instability and degradation.
Innovation Solution
An implantable medical device is developed with nucleic acid-encapsulated particles dispersed within a polymer matrix containing an ethylene vinyl acetate copolymer, where the melting temperature of the carrier is matched or exceeded by the polymer matrix, ensuring stability and controlled release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lipids are used to encapsulate nucleic acids, then protection from degradation and cellular uptake are improved, but the low melting point of lipids makes controlled and sustained release difficult
Solution Approach 1:
The patent combines lipids with a polymer matrix to create a composite delivery system. The polymer matrix provides structural support and controlled release properties, while the lipid particles maintain their protective and cellular uptake functions. This composite structure allows the system to benefit from both materials' advantages, enabling sustained release over an extended period while maintaining nucleic acid protection.
2Ease of manufacture
If conventional polymer materials are used to form implantable devices, then device structure and controlled release are improved, but the processing temperatures are incompatible with low melting point lipids
Solution Approach 1:
The patent selects a polymer matrix with a melting temperature ratio to the carrier melting temperature of about 2°C/°C or less. This parameter matching ensures that the polymer can be processed at temperatures compatible with the lipid carrier, allowing the lipid particles to be incorporated into the polymer matrix during standard processing without degradation. The specific selection of polymer properties enables manufacturing at lower temperatures that preserve lipid integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables a sustained release of nucleic acids over an extended period, enhancing the stability and efficacy of nucleic acid delivery while maintaining the integrity of the encapsulated particles.
Implementation Method 1
The ratio of the melting temperature of the ethylene vinyl acetate copolymer to the melting temperature of the carrier is about 2° C./° C. or less
Implementation Method 2
capable of delivering nucleic acid-encapsulated particles over a sustained period of time
Data Source
AI summary
An implantable medical device is provided. The device comprises a drug release layer, wherein the drug release layer contains particles dispersed within a polymer matrix. The lipid particles include a carrier component that contains a carrier (e.g., peptide, protein, carbohydrate, lipid, polymer, etc.) and encapsulates a nucleic acid, wherein the polymer matrix includes an ethylene vinyl acetate copolymer. The ratio of the melting temperature of the ethylene vinyl acetate copolymer to the melting temperature of the carrier is about 2° C./° C. or less.