Polyamide Polymers Enhancing Oligonucleotide Endosomal Escape
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Solution Overview
Problem
Current methods for delivering oligonucleotides using polyconjugates face challenges in achieving effective therapeutic delivery due to limitations in endosomal escape and cellular uptake, particularly for therapeutic purposes.
Innovation Solution
Development of novel endosomolytic poly(amide) polymers and polyconjugates containing cationic and aliphatic moieties, which are designed to facilitate the delivery of oligonucleotides by incorporating masking agents and targeting ligands to enhance cellular uptake and endosomal escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyconjugates are used for oligonucleotide delivery, then oligonucleotides can be delivered to cells, but endosomal escape and cellular uptake are insufficient for effective therapeutic delivery
Solution Approach 1:
The patent employs composite polymer structures combining poly(amide) backbone with cationic and aliphatic functional moieties. This composite approach creates a multifunctional delivery system that simultaneously provides oligonucleotide binding, cellular membrane interaction, and endosomal escape capabilities, resolving the contradiction between delivery effectiveness and structural simplicity
Solution Approach 2:
The patent introduces masking agents and targeting ligands at specific locations on the polymer structure. The masking agents are positioned to control polymer conformation and hide cationic charges during circulation, while targeting ligands are placed to recognize specific cell surface receptors. This localized functional differentiation enhances therapeutic delivery without requiring complete structural redesign
2Reliability
If masking agents and targeting ligands are incorporated to enhance cellular uptake and endosomal escape, then therapeutic delivery is improved, but the polymer synthesis and conjugation process becomes more complex
Solution Approach 1:
The patent synthesizes the poly(amide) polymer with distinct functional segments: the backbone provides structural integrity, cationic moieties provide oligonucleotide binding, aliphatic moieties provide membrane interaction, masking agents provide steric protection, and targeting ligands provide cell-specific recognition. This segmentation allows each component to be optimized independently while maintaining overall functionality, balancing manufacturing complexity with performance
Solution Approach 2:
The patent performs preliminary conjugation of masking agents and targeting ligands to the poly(amide) backbone during the polymer synthesis phase. By establishing these functional groups early in the synthesis process rather than adding them later, the patent simplifies the overall manufacturing workflow and ensures uniform distribution of functional moieties throughout the polymer structure
Data Source
AI summary
The present invention provides poly(amide) polymers, polyconjugates, compositions and methods for the delivery of oligonucleotides for therapeutic purposes.