Antibacterial Hydrogel with Dendritic Polymers for SSI Prevention
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Solution Overview
Problem
Current methods for preventing surgical site infections (SSIs) rely on traditional antibiotics, which can lead to antibiotic resistance and are not entirely effective, necessitating the development of alternative antimicrobial solutions.
Innovation Solution
A biodegradable hydrogel composition comprising a cross-linking agent and multiple co-polymers with a water-soluble backbone polymer and dendritic or hyperbranched polymers of generation 4, 5, or 6, featuring carboxylic amines for cross-linking, providing broad-spectrum antibacterial activity and resistance to resistant bacterial strains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antibiotics are used to prevent surgical site infections, then bacterial growth is inhibited, but antibiotic resistance develops
Solution Approach 1:
The patent changes the chemical parameters of the antimicrobial agent by using quaternary ammonium compounds with specific chain lengths and structures, replacing traditional antibiotics. This parameter change maintains antimicrobial effectiveness while avoiding the resistance development associated with conventional antibiotics.
Solution Approach 2:
The patent creates a composite hydrogel system combining polyethylene glycol backbone with dendritic or hyperbranched structures containing multiple quaternary ammonium groups. This composite structure provides broad-spectrum antimicrobial activity while maintaining biocompatibility and preventing resistance through multiple simultaneous mechanisms of action.
2Reliability
If dendritic polymers of high generation are used to enhance antimicrobial activity, then broad-spectrum antibacterial effect is achieved, but molecular weight and complexity increase
Solution Approach 1:
The patent concentrates antimicrobial functionality at the periphery of dendritic or hyperbranched structures where quaternary ammonium groups are positioned to maximize interaction with bacterial membranes. This local concentration of activity provides broad-spectrum effectiveness without requiring excessive overall molecular complexity.
Solution Approach 2:
The patent employs nested dendritic structures where generations are built within each other, with the polyethylene glycol backbone serving as the core and successive dendritic generations providing increasing numbers of antimicrobial groups in a compact, organized manner.
3Stability of the object's composition
If cross-linking is performed to form hydrogel network, then structural stability is improved, but biodegradability may be reduced
Solution Approach 1:
The patent employs biodegradable cross-linking bonds that provide temporary structural stability during the critical post-surgical period, then naturally degrade to allow tissue regeneration and clearance. The cross-links are designed to be sufficiently stable to maintain hydrogel integrity initially, but ultimately degradable to prevent long-term foreign body presence.
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 effectively inhibits bacterial growth and colonization on surgical sites, reducing the risk of SSIs and minimizing antibiotic resistance by forming a biocompatible, biodegradable barrier that remains effective against resistant bacteria.
Implementation Method 1
wherein at least one functional group comprising a carboxylic amine is covalently attached to the periphery of the dendritic or hyperbranched polymer
Implementation Method 2
forming a biocompatible, biodegradable barrier that remains effective against resistant bacteria
Implementation Method 3
at least one functional group comprising a carboxylic amine is covalently attached to the periphery of the dendritic or hyperbranched polymer
Data Source
Figure 1A~1B
Figure 1C
Figure 2
AI summary
The present invention relates to an antibacterial co-polymer comprising a water soluble backbone polymer having in at least one end a dendritic or hyperbranched polymer of generation 1 to 6 wherein at least one functional group comprising a carboxylic amine has been covalently attached to the periphery of the dendritic or hyperbranched polymer. The present invention also relates to said anti-bacterial co-polymer when said co-polymer has been cross-linked with a cross-linking agent and to uses of the cross-linked co-polymer in a hydrogel for the treatment or prevention of bacterial infections, particularly in surgical site infections (SSI's).