Biodegradable Ionizable Lipids for Fast-Clearing Nucleic Acid Delivery
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Solution Overview
Problem
Existing cationic lipids with geminal dialkyl structures degrade slowly in the liver, making them unsuitable for applications requiring accelerated metabolism in vivo, and there is a need for improved lipid nanoparticles for efficient delivery of biologically active substances like nucleic acids.
Innovation Solution
Development of a new class of ionizable cationic lipid compounds with biodegradable groups in the tail chain, enhancing metabolism and reducing toxicity, and the formulation of lipid nanoparticles for efficient delivery of nucleic acids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional cationic lipids are used in lipid nanoparticles, then delivery efficiency is achieved, but metabolism in the liver is slow and toxicity increases
Solution Approach 1:
The patent modifies the chemical structure of cationic lipids by introducing biodegradable groups (ester bonds, amide bonds, or disulfide bonds) at specific positions in the molecular structure. This structural parameter change enables the lipids to be metabolized by enzymes in the liver, transforming them from non-degradable to biodegradable, thereby reducing accumulation and toxicity while maintaining delivery efficiency
Solution Approach 2:
The patent creates composite lipid structures by combining hydrophobic tail chains with biodegradable functional groups (ester, amide, or disulfide bonds). These composite structures integrate the delivery capabilities of traditional cationic lipids with the metabolic breakdown properties of biodegradable groups, achieving both efficient delivery and reduced toxicity
2Productivity
If cationic lipids with long circulation time are used, then delivery efficiency is improved, but metabolism and removal from the body are delayed
Solution Approach 1:
The patent introduces biodegradable functional groups (ester bonds, amide bonds, or disulfide bonds) into the cationic lipid structure, changing the metabolic parameter from slow/non-metabolizable to rapidly metabolizable. This allows the lipids to be broken down by hepatic enzymes after delivering their cargo, significantly reducing the circulation time and enabling faster clearance from the body
Solution Approach 2:
The patent extracts the non-biodegradable hydrocarbon tail portions from the lipid structure and replaces them with biodegradable functional groups that can be cleaved by enzymes. This extraction of the persistent component and replacement with degradable components enables the lipid to fulfill its delivery function while subsequently being removed from the system
Data Source
AI summary
Provided herein is a class of a rapidly metabolized lipid compound, and particularly relates to compounds represented by formula (I), or pharmaceutically acceptable salts, isotopic variants, tautomers, or stereoisomers thereof. Also provided is a nanoparticle pharmaceutical composition comprising said compound, and the application of said compound and its composition in the delivery of nucleic acids.