Alcalase Enzymatic Treatment of Collagen Tissue for Pliability
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Solution Overview
Problem
Tissue products derived from collagen-containing matrices often exhibit undesirable stiffness and unnatural feel, which can complicate surgical procedures and tissue regeneration, as they do not meet the desired mechanical properties and may induce an immune response.
Innovation Solution
The use of alcalase to treat collagen-containing tissue matrices under specific conditions, including incubation time and radiation, to enhance pliability without significant collagen degradation, thereby improving mechanical properties and reducing immunogenicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tissue products are used for surgical applications, then they provide tissue replacement or augmentation, but they are undesirably stiff and have an unnatural feel
Solution Approach 1:
The patent applies enzymatic treatment with proteases (such as bromelain, collagenase, or dispase) to modify the collagen matrix structure. This chemical parameter change selectively degrades specific collagen cross-links and intermolecular bonds, transforming the tissue from a stiff state to a more pliable state while preserving sufficient structural integrity for surgical handling.
2Ease of operation
If enzymes are used to increase pliability, then the tissue becomes more flexible, but collagen degradation may occur
Solution Approach 1:
The patent employs controlled enzymatic treatment where enzymes are applied at specific concentrations for defined time periods to achieve partial degradation of collagen cross-links. This partial action is sufficient to improve pliability while stopping before excessive degradation occurs, maintaining the structural framework needed for tissue integrity and surgical performance.
Solution Approach 2:
The enzymatic treatment process includes monitoring and control mechanisms to assess collagen degradation levels. Treatment conditions (enzyme concentration, time, temperature, pH) are adjusted based on measured outcomes to prevent over-degradation, ensuring that pliability improvements do not compromise structural integrity.
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 treatment with alcalase increases tissue pliability and maintains essential mechanical properties like tensile strength and elasticity, while reducing the immune response, resulting in tissue products that feel more natural and support effective tissue regeneration.
Implementation Method 1
contacting the collagen-containing matrix with alcalase under conditions including an incubation time in a solution having an alcalase activity selected to produce a desired increase in a pliability of the tissue matrix
Implementation Method 2
contacting the dermal tissue matrix with alcalase; and treating the tissue matrix with radiation, wherein the alcalase is provided under conditions selected to produce a desired tissue matrix pliability after treatment with radiation
Data Source
Figure 1A~1D
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AI summary
Methods for treating tissue matrices and tissue matrices produced according to the methods are provided. The methods can include treating a tissue matrix with a proteolytic enzyme to produce a desired pliability of the tissue matrix and/or to control the immunogenicity of the tissue matrix. The methods can also comprise performing an assay to determine if contacting the at least one collagen-containing tissue matrix with a proteolytic enzyme has altered the at least one collagen-containing tissue matrix to reduce a human immune response to the tissue matrix. The methods can comprise treatment with alcalase under conditions controlled to produce a desired pliability without unacceptable alteration in collagen structure.