Tissue Matrix Anti-microbial Binding via Passive Adsorption
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Solution Overview
Problem
Existing tissue matrices used for regenerating or repairing damaged tissues are prone to infection due to their foreign body nature, and current methods to enhance antimicrobial activity often alter the biologic properties of the matrices or require chemical cross-linking, which can be harmful.
Innovation Solution
A method involving a collagen-based tissue matrix that is contacted with a cationic anti-microbial agent using a non-denaturing aqueous solution, allowing stable binding by passive adsorption without cross-linking, thereby maintaining the matrix's functionality and preventing adverse modifications to the agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical cross-linking is used to bind anti-microbial agents to tissue matrix, then binding stability is improved, but the biologic properties of the matrix are altered and harmful effects occur
Solution Approach 1:
The patent changes the binding mechanism from chemical cross-linking to passive adsorption, utilizing electrostatic interactions between cationic anti-microbial agents and the tissue matrix. This parameter change in binding mechanism achieves stable binding without the harmful effects of cross-linking on biologic properties
Solution Approach 2:
The patent uses electrostatic interactions as an intermediary mechanism to bind anti-microbial agents to the tissue matrix. This intermediary approach avoids direct chemical cross-linking while maintaining stable binding, thereby preserving the biologic properties of the matrix
2Object-affected harmful factors
If anti-microbial agents are bound to tissue matrix, then infection risk is reduced, but the matrix regenerative capabilities may be compromised
Solution Approach 1:
The patent changes the binding method to passive adsorption without cross-linking, which maintains the matrix structure and regenerative capabilities while providing anti-microbial protection. The electrostatic binding preserves the matrix's ability to support tissue regeneration
3Duration of action of stationary object
If cross-linking is used to enhance anti-microbial activity, then duration of action is improved, but the matrix structure is modified adversely
Solution Approach 1:
The patent changes the binding mechanism to passive adsorption, which provides sufficient duration of anti-microbial activity without adversely modifying the matrix structure. The electrostatic interactions maintain structural integrity while providing prolonged protection
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 method effectively reduces the risk of infection by maintaining the biologic properties of the tissue matrix and preserving the antimicrobial activity for an extended period post-implantation, ensuring the matrix's regenerative capabilities and safety.
Implementation Method 1
contacting the tissue matrix with an aqueous solution containing a cationic anti-microbial agent, wherein the agent stably binds to the matrix by passive adsorption
Data Source
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AI summary
Tissue matrices having anti-microbial properties are provided. In certain embodiments, the tissue matrices include cationic anti-microbial agents that form a stable bond with the tissue matrices without adversely affecting the biologic properties of the tissue matrices.