Cationic Gel Particle for Intracellular Delivery
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Solution Overview
Problem
Current methods face challenges in delivering components or compounds into cells without inhibiting cell proliferation or differentiation, particularly in selecting polymers that can easily enter cells without disrupting cellular processes.
Innovation Solution
Development of a novel intracellular delivery vehicle, specifically a cationic gel particle with a positive charge, synthesized through radical polymerization using a cationic polymerization initiator and monomers, which allows easy introduction into cells without affecting cell survival, proliferation, or differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cationic polymers are used for intracellular delivery, then delivery efficiency is improved, but cell proliferation is inhibited
Solution Approach 1:
The patent modifies the chemical structure of cationic polymers by introducing specific side chains (e.g., polyethylene glycol chains, carboxylic acid groups) to adjust the balance between positive charge density and biocompatibility. This parameter change allows the polymer to maintain sufficient cationic character for efficient cellular uptake while reducing toxicity to cell proliferation
Solution Approach 2:
The invention creates composite polymer structures combining cationic moieties with biocompatible segments (such as PEG chains and hydrophilic side groups). This composite approach enables the delivery vehicle to exhibit both high delivery efficiency through cationic interactions and reduced cytotoxicity through the biocompatible components
2Ease of operation
If cationic polymers are introduced into cells, then intracellular delivery is achieved, but cell division is inhibited
Solution Approach 1:
The patent applies local quality by concentrating the cationic charge primarily at the polymer's terminal groups or side chains rather than throughout the entire backbone. This localized cationic distribution enables effective interaction with cellular membranes for delivery while minimizing disruption to intracellular processes that would inhibit cell division
3Ease of manufacture
If conventional polymerization methods are used, then polymer production is achieved, but selective polymer identification for cell-compatible delivery is difficult
Solution Approach 1:
The patent establishes specific parameter ranges for polymer structure (charge density, molecular weight, side chain length and composition) that correlate with cell compatibility. These defined parameters provide clear selection criteria for identifying polymers suitable for intracellular delivery without inhibiting cellular functions
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 vehicle enables efficient delivery of desired components into cells with minimal impact on cellular functions, as demonstrated by its ability to introduce temperature-sensitive probes without inhibiting cell division or differentiation, showcasing its biocompatibility and effectiveness.
Implementation Method 1
synthesized through radical polymerization using a cationic polymerization initiator and monomers
Implementation Method 2
an arbitrarily shaped gel particle of which surface is covered with a positive charge
Data Source
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AI summary
An intracellular delivery vehicle of which surface is covered by a positive charge, an intracellular delivery complex in which a component or compound desired is loaded in the intracellular delivery vehicle, a temperature-sensitive probe comprising the intracellular delivery complex, and a method for measuring the intracellular temperature by the temperature-sensitive probe are disclosed. The intracellular delivery vehicle is useful on account of its capability of easily delivering the component or compound desired inside the cell without inhibiting cell proliferation.