Dynamic Antimicrobial Hydrogel via Receptor-Ligand Crosslinking
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Solution Overview
Problem
Existing hydrogels, particularly dynamic hydrogel materials, suffer from insufficient mechanical properties and biocompatibility due to chemical interactions, limiting their clinical applications, and lack effective antimicrobial activity for tissue repair.
Innovation Solution
A dynamic antimicrobial hydrogel is developed using natural receptor-ligand recognition between vancomycin and a dipeptide-based receptor, forming crosslinking points through specific interactions to create an injectable self-healing hydrogel with enhanced mechanical properties and antimicrobial activity, achieved through a method involving modification reactions and UV-induced crosslinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If chemical interactions (reversible covalent bonds and hydrogen bonds) are used to create dynamic hydrogels, then self-healing capability is improved, but mechanical strength and biocompatibility deteriorate
Solution Approach 1:
The patent introduces a peptide-based intermediary system that mediates between the need for dynamic self-healing and mechanical strength. The peptide sequences act as molecular mediators that form reversible crosslinks through specific binding, providing both self-healing capability and enhanced mechanical properties compared to simple hydrogen bonding alone.
Solution Approach 2:
The patent creates a composite hydrogel system combining peptide crosslinkers with hydrogel matrix. This composite approach integrates the self-healing properties of reversible peptide interactions with the structural support of the hydrogel network, achieving both soft mechanics and self-repair capabilities.
2Ease of repair
If chemical interactions are used to create dynamic hydrogels, then self-healing capability is improved, but biocompatibility deteriorates
Solution Approach 1:
The peptide sequences serve as biocompatible intermediaries that enable self-healing through natural biomolecular interactions. These peptide mediators are designed to be biologically compatible while providing the necessary reversible binding for self-repair functionality.
Solution Approach 2:
The patent changes the chemical parameters of crosslinking from synthetic chemical bonds to biomolecular peptide interactions. This parameter change shifts the system toward better biocompatibility while maintaining self-healing capability through reversible peptide binding.
3Ease of manufacture
If conventional hydrogel materials are used, then ease of manufacture is maintained, but antimicrobial activity deteriorates
Solution Approach 1:
The patent designs the peptide crosslinker to perform multiple functions simultaneously: providing structural crosslinking for hydrogel formation, enabling self-healing through reversible binding, and delivering antimicrobial activity through vancomycin incorporation. This multi-functional design maintains ease of manufacture while adding therapeutic capabilities.
Solution Approach 2:
The patent merges the structural function of crosslinkers with the therapeutic function of antimicrobial agents. The vancomycin-containing peptide crosslinker combines mechanical network formation with bacterial inhibition, creating a single component that performs both structural and therapeutic roles.
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 hydrogel exhibits excellent self-recovery, injectability, and antimicrobial activity, demonstrating potential for clinical applications in skin repair with improved biocompatibility and dynamics, facilitating rapid tissue repair.
Implementation Method 1
based on natural mutual recognition between the ligand vancomycin and a dipeptide D-Ala-D-Ala (abbreviated as AA)-based receptor, ligand/receptor-based crosslinking points are formed
Implementation Method 2
adding a photoinitiator to trigger a crosslinking reaction under irradiation of ultraviolet (UV) light to obtain the dynamic hydrogel
Data Source
AI summary
A dynamic antimicrobial hydrogel based on natural receptor-ligand recognition, and a preparation method and use thereof are provided. A ligand vancomycin and a receptor AA-based material each are first modified with a modification material, and then a photoinitiator is added to prepare a hydrogel material under irradiation of ultraviolet (UV) light. In the hydrogel, a three-dimensional (3D) network structure is formed through crosslinking. After undergoing a fracture under an external pressure, the hydrogel can rapidly heal itself through crosslinking due to a ligand-receptor interaction and a multi-hydrogen-bond interaction, which bio-mimicks a natural ligand-receptor interaction to realize the dynamics of the hydrogel material. The high antiomicrobial activity of vancomycin imparts the functionality of the hydrogel material; and the physiologically-derived monomer improves the biocompatibility and reduces the biological toxicity.