Lipidoid Lipid Nanoparticles for Low-Toxicity Gene Delivery
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Solution Overview
Problem
Existing gene delivery techniques, such as the use of viral vectors, cause acute toxicity and harmful side-effects in patients, necessitating the development of compositions and methods for delivering nucleic acids to cells with high efficiency and low toxicity.
Innovation Solution
Development of novel lipid nanoparticle compositions comprising lipidoid compounds, which are used to deliver nucleic acids to cells in vivo, ex vivo, and in vitro, with specific compounds of Formulas (I) and (II), allowing for high efficiency and low toxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If viral vectors are used for gene delivery, then gene delivery efficiency is achieved, but acute toxicity and harmful side-effects occur
Solution Approach 1:
The patent modifies the chemical structure of lipid components by varying parameters such as chain length, saturation, and headgroup composition to create lipid nanoparticle compositions that achieve effective gene delivery while reducing cytotoxicity. Specific parameter changes include using ionizable lipids with optimized pKa values and controlled hydrophobic chain lengths to balance transfection efficiency and biocompatibility
Solution Approach 2:
The invention employs composite lipid nanoparticle formulations consisting of multiple lipid types (ionizable lipid, helper lipid, cholesterol, and PEG-lipid) in specific ratios. This composite approach combines the advantages of different lipid components to achieve both high gene delivery efficiency and reduced toxicity, with each component contributing specific functional properties to the overall system
2Ease of manufacture
If conventional lipid formulations are used, then ease of manufacture is maintained, but delivery efficiency to hepatocytes is insufficient
Solution Approach 1:
The patent optimizes specific parameters of lipid molecules including the ionization constant (pKa) of ionizable lipids, the length and saturation of hydrophobic chains, and the composition ratio of different lipid components to enhance hepatocyte targeting and uptake. These parameter optimizations maintain compatibility with existing manufacturing processes while significantly improving delivery efficiency to liver cells
Data Source
AI summary
Compositions comprising lipidoid compounds, methods of preparing such compositions, and the use of these compositions in gene delivery applications are disclosed.