Amphiphilic Polymers for Targeted Cellular Payload Release
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Solution Overview
Problem
Current pharmaceutical formulations lack the ability to respond to changes in macromolecule concentration, such as those occurring within cells, which limits their targeted delivery and release of bioactive agents.
Innovation Solution
Development of polymers with specific repeat units that form hierarchical structures, like poly(2-oxazoline) nanostructures, which undergo a lower critical solution temperature (LCST) transition in response to macromolecule concentration changes, enabling controlled release of payloads within high macromolecular environments like cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pharmaceutical formulations are used, then the formulations can protect payloads from the surrounding biological environment and enhance circulation half-life, but the formulations cannot respond to changes in macromolecule concentration to enable targeted release at the desired site
Solution Approach 1:
The patent employs polymers whose conformation and solubility change in response to macromolecule concentration changes. The polymers transition from an extended soluble conformation in low macromolecule concentration environments (circulation) to a collapsed insoluble conformation in high macromolecule concentration environments (cellular interiors), enabling targeted payload release based on the parameter change of macromolecule concentration
Solution Approach 2:
The formulations utilize the natural macromolecular crowding effect present in cellular environments as an intrinsic trigger for payload release. The polymers automatically respond to the high macromolecule concentration inside cells without requiring external stimuli, allowing the system to self-regulate payload release based on the local biological environment
2Productivity
If hierarchical structure formulations are used, then the formulations can facilitate accumulation in target tissue, but there are no formulations that respond to changes in macromolecule concentration occurring upon entry into a cell
Solution Approach 1:
The patent utilizes changes in macromolecule concentration as a trigger parameter. The polymers are designed to undergo conformational changes and phase transitions in response to the specific parameter change of macromolecule concentration that occurs when transitioning from extracellular to intracellular environments, enabling targeted payload release at the desired site
Solution Approach 2:
The patent employs polymers that undergo phase transitions between soluble and insoluble states based on macromolecule concentration. The polymers transition from a soluble extended conformation in physiological fluids to an insoluble collapsed conformation in high macromolecule concentration environments, facilitating payload release through this phase transition mechanism
3Adaptability or versatility
If polymers with macromolecule concentration responsiveness are developed, then targeted delivery and release can be enhanced, but the formulations may increase in complexity
Solution Approach 1:
The patent employs block copolymers composed of hydrophilic and hydrophobic blocks that self-assemble into hierarchical structures. This composite material approach allows the polymer to exhibit both solubility in physiological fluids and responsiveness to macromolecule concentration changes, achieving complex functionality through the combination of simple hydrophilic and hydrophobic segments
Solution Approach 2:
The patent utilizes block copolymers with distinct hydrophilic and hydrophobic segments that self-assemble into hierarchical structures with core-shell morphology. The segmentation of the polymer into functional blocks enables independent optimization of each segment's properties while maintaining overall responsiveness to macromolecule concentration changes
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
These polymers form stable nanostructures that degrade and release bioactive agents specifically within high macromolecular environments, enhancing targeted delivery and minimizing systemic toxicity, thereby improving the efficacy of biotherapeutics.
Implementation Method 1
undergo a lower critical solution temperature (LCST) transition in response to macromolecule concentration changes
Data Source
AI summary
Disclosed herein are amphiphilic polymers and hierarchical structures (e.g., emulsions) comprising said polymer. Also disclosed herein are methods of using the polymers and hierarchical structure disclosed herein.