Lipid Nanoparticle Lyophilization for Stable Nucleic Acid Storage
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Solution Overview
Problem
Lipid nanoparticle formulations for nucleic acid delivery face stability issues during storage, requiring impractical cold temperatures, which limits their use and distribution, especially in remote areas lacking proper equipment.
Innovation Solution
A method of lyophilizing lipid nanoparticles with specialized excipients such as potassium sorbate, thiosulfate, and iodixanol, combined with specific lyophilization parameters, to maintain integrity and efficacy upon reconstitution, allowing storage at more practical temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If lipid nanoparticle formulations are stored at cold temperatures to maintain stability, then the stability and integrity of the formulation is improved, but the ease of operation and distribution is worsened due to impractical storage requirements
Solution Approach 1:
The patent applies parameter changes by modifying the physical state of the lipid nanoparticle formulation through lyophilization (freeze-drying), transforming it from a liquid suspension requiring cold storage to a solid lyophilized cake that can be stored at higher temperatures. This phase transition fundamentally changes the storage temperature parameter from -70°C to 25°C, resolving the contradiction between stability and ease of operation
Solution Approach 2:
The patent uses composite materials by combining lipid nanoparticles with excipients (such as sugars, polymers, or other stabilizing agents) during the lyophilization process. This creates a composite lyophilized formulation where the excipients form a protective matrix that maintains nanoparticle integrity without requiring ultra-cold storage, thus improving both stability and ease of distribution
2Ease of operation
If lipid nanoparticle formulations are lyophilized to enable practical storage temperatures, then the ease of operation is improved, but the manufacturing precision and integrity of the nanoparticles may be worsened
Solution Approach 1:
The patent applies preliminary action by optimizing the formulation composition before lyophilization, including selecting specific excipients and adjusting pH, buffer composition, and nanoparticle concentration. These preliminary adjustments ensure that the nanoparticles remain intact and functional after the lyophilization process, preventing aggregation or structural damage
Solution Approach 2:
The patent uses intermediaries (excipients such as sugars like sucrose or trehalose, or polymers) that act as protective agents during lyophilization. These intermediaries form a glassy matrix around the nanoparticles during freezing and drying, preventing direct exposure to damaging conditions and maintaining nanoparticle size, shape, and encapsulation efficiency after reconstitution
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
The method preserves lipid nanoparticle integrity, encapsulated nucleic acid, and particle size, enabling stable storage and convenient reconstitution for administration at temperatures ranging from -20°C to 25°C.
Implementation Method 1
A method of lyophilizing lipid nanoparticles
Implementation Method 2
lyophilization process comprising freezing and drying
Data Source
AI summary
Methods of preparing lyophilized lipid nanoparticle-nucleic acid compositions are provided. The methods comprise preparing a suspension of lipid nanoparticles with a monosaccharide and one or more excipients selected from thiosulfate, potassium sorbate, sodium benzoate, and iodixanol. Lyophilized lipid nanoparticle-nucleic acid compositions and methods of reconstituting and administering the same are further provided.