Fluorinated Polyamine Polymers for Higher Cell Transfection Viability
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Solution Overview
Problem
Cationic polymers like polyethyleneimines and poly(amidoamine) dendrimers have low transfection efficacy and poor cell viability, limiting their commercial and clinical applications for delivering biomolecules into cells.
Innovation Solution
Modified polyamine polymers with fluorinated substituents, such as polyethyleneimine and poly(amidoamine) dendrimers, are used to enhance delivery efficiency and cell viability by improving affinity for cell membranes and facilitating transport across lipid bilayers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cationic polymers like polyethyleneimines and poly(amidoamine) dendrimers are used as carriers to introduce exogenous genes into cells, then ease of manufacture is improved, but transfection efficacy and cell viability deteriorate
Solution Approach 1:
The patent modifies the chemical structure of cationic polymers by introducing fluorinated substituents (e.g., -CF3 groups) at specific positions on the polymer backbone. This parameter change in molecular structure enhances the polymer's ability to interact with cell membranes and facilitates endosomal escape, thereby improving transfection efficacy while maintaining ease of manufacture through established polymerization methods
Solution Approach 2:
The invention creates composite polymeric structures by combining cationic polymer backbones with fluorinated side chains or substituents. This composite approach integrates the advantageous properties of both the cationic polymer (ease of manufacture, gene complexing ability) and the fluorinated groups (membrane affinity, endosomal disruption), resolving the contradiction between manufacturability and transfection efficacy
2Ease of manufacture
If cationic polymers like polyethyleneimines and poly(amidoamine) dendrimers are used as carriers to introduce exogenous genes into cells, then ease of manufacture is improved, but cell viability deteriorates
Solution Approach 1:
By modifying the polymer structure with fluorinated substituents, the patent changes the physical-chemical parameters of the carrier system. The fluorinated groups reduce the polymers' cytotoxicity by altering membrane interaction mechanisms, allowing for less damaging cellular uptake and endosomal escape processes while maintaining ease of manufacture
Solution Approach 2:
The patent converts the potentially harmful strong cationic character of the polymers into a beneficial effect by adding fluorinated groups. These groups modulate the polymer's interaction with cellular membranes, transforming the harmful cytotoxic effect into a controlled, beneficial cellular uptake mechanism that improves cell viability while maintaining manufacturing simplicity
3Reliability
If modified polyamine polymers with fluorinated substituents are used to enhance delivery efficiency, then transfection efficacy is improved, but device complexity increases
Solution Approach 1:
The patent achieves improved transfection efficacy by changing the chemical parameters of the polymer (adding fluorinated substituents) rather than by increasing structural complexity. The modifications are introduced at specific positions on the polymer backbone, providing enhanced membrane affinity and endosomal escape capability without creating complex multi-component systems
Solution Approach 2:
The fluorinated substituents are placed at specific local positions on the polymer structure (e.g., at the N-terminal or at specific repeat units) rather than uniformly throughout. This local modification approach provides targeted functional enhancement for membrane interaction while keeping the overall polymer structure relatively simple and easy to characterize
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 modified polymers demonstrate improved transfection efficacy and cell viability, enabling effective delivery of biomolecules such as DNA, RNA, and proteins into various cell types.
Implementation Method 1
improving affinity for cell membranes and facilitating transport across lipid bilayers
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
Provided herein are compounds, compositions, and methods for delivering biomolecules to cells. In particular, the present disclosure provides modified polyamine polymers, including polyamine polymers having fluorinated substituents.