Disulfide Ionizable Lipids for Low-Toxicity Nucleic Acid Delivery
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Solution Overview
Problem
Conventional methods for delivering nucleic acids face challenges such as immunogenicity, tissue accumulation, and inflammation, limiting their effectiveness and safety in vivo.
Innovation Solution
Development of ionizable lipids containing biodegradable disulfide bonds, which are formulated into lipid nanoparticles to enhance drug encapsulation efficiency and reduce side effects like hepatotoxicity, enabling targeted delivery of anionic drugs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lipid-DNA conjugates are used for nucleic acid delivery, then drug encapsulation efficiency is improved, but inflammation and tissue accumulation occur in the body
Solution Approach 1:
The patent modifies the chemical structure of ionizable lipids by introducing a disulfide bond, which changes the biodegradability parameter of the lipid. This structural parameter change enables the lipid to maintain stable drug encapsulation while improving biodegradability to reduce inflammation and tissue accumulation in the body
Solution Approach 2:
The patent creates a composite lipid structure combining traditional ionizable lipid components with a disulfide bond motif. This composite structure integrates the drug encapsulation capability of conventional lipids with the biodegradable特性 of disulfide-containing compounds, achieving both high encapsulation efficiency and reduced harmful effects
2Reliability
If viral delivery systems are used for gene therapy, then delivery effectiveness is improved, but immunogenicity and mass production difficulties arise
Solution Approach 1:
The patent extracts and removes the viral component from the delivery system, replacing it with a non-viral ionizable lipid-based nanoparticle system. This extraction eliminates the immunogenicity associated with viral vectors while maintaining effective nucleic acid delivery through the lipid's ability to form stable complexes with anionic drugs
3Duration of action of stationary object
If ionizable lipids with disulfide bonds are used, then biodegradability is improved, but synthesis complexity increases
Solution Approach 1:
The patent segments the lipid molecule into distinct functional components: the ionizable lipid backbone and the disulfide bond motif. This segmentation allows for modular synthesis where the disulfide-containing fragment can be introduced as a separate unit, simplifying the overall manufacturing process while maintaining biodegradability
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 ionizable lipids with disulfide bonds stabilize drug delivery, exhibit low cytotoxicity, and achieve efficient cellular uptake, particularly for nucleic acid delivery, with potential therapeutic benefits for liver diseases.
Implementation Method 1
ionizable lipid containing a biodegradable disulfide bond
Data Source
AI summary
The present disclosure relates to a novel ionizable lipid containing a biodegradable disulfide bond. The ionizable lipid containing a disulfide bond, according to the present disclosure, stably delivers an anionic drug when prepared into lipid nanoparticles and exhibits an excellent effect, in particular, in delivering nucleic acids, and thus can be effectively used in related technical fields such as lipid nanoparticle-mediated gene therapy.