Polymerized Peptide Hydrogel via Oxidative Cross-Linking
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Solution Overview
Problem
Conventional collagen-like peptides lack satisfactory physical strength and are prone to denaturation by heat, making them unsuitable for medical and research applications, and natural collagen use is limited by safety concerns such as allergy risks and parasitic zoonosis.
Innovation Solution
A polymerized peptide with a triple-helical structure formed through oxidative cross-linking of collagen-like peptides, incorporating cysteine residues for enhanced strength and stability, and functional amino acid sequences for specific physiological functions, such as cell adhesiveness, is developed. This peptide can be processed into hydrogels or sheets for various medical and research applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional collagen-like peptides are used, then safety is improved (avoiding natural collagen risks), but physical strength and thermal stability deteriorate
Solution Approach 1:
The invention creates a composite structure by polymerizing multiple collagen-like peptide chains through oxidative cross-linking. The resulting polymerized peptide combines the safety of synthetic peptides with enhanced physical strength through intermolecular cross-links, effectively resolving the contradiction between safety and strength
Solution Approach 2:
The invention changes the molecular weight and structural parameters of collagen-like peptides by controlling the degree of polymerization and cross-linking density. This transforms weak individual peptides into strong polymer networks with improved mechanical properties while maintaining the safety advantages of synthetic peptides
2Reliability
If conventional collagen-like peptides are used, then safety is improved (avoiding natural collagen risks), but thermal stability deteriorates
Solution Approach 1:
The polymerized peptide forms a composite network structure where cross-linked peptide chains provide enhanced thermal stability. The interconnected network resists thermal denaturation better than individual peptide chains, while the synthetic origin maintains safety advantages
Solution Approach 2:
By adjusting the cross-linking density and molecular weight of the polymerized peptides, the invention optimizes thermal stability parameters. The cross-linked structure raises the denaturation temperature and improves resistance to thermal degradation while preserving safety
3Adaptability or versatility
If natural collagen is used, then physiological activities are improved (cell adhesion, wound healing), but safety deteriorates (allergy risks, parasitic zoonosis)
Solution Approach 1:
The invention copies the beneficial physiological functions of natural collagen by incorporating specific functional motifs (such as RGD sequences for cell adhesion) into synthetic peptide sequences. This allows replication of collagen's biological activities without the safety risks associated with natural collagen extraction
Solution Approach 2:
The invention modifies the amino acid sequence parameters to include specific functional motifs known to mediate physiological activities. By optimizing the sequence composition and arrangement, the synthetic peptides achieve desired biological functions while maintaining complete control over safety characteristics
4Adaptability or versatility
If collagen-like peptides are processed into sheets or gels, then applicability is improved (medical materials, wound dressings), but structural integrity deteriorates
Solution Approach 1:
The invention performs preliminary oxidative cross-linking of collagen-like peptides before processing into sheets or gels. This pre-cross-linking strengthens the molecular network, ensuring structural integrity is maintained during subsequent processing and final application as medical materials
Solution Approach 2:
The polymerized peptides form a composite network that provides structural reinforcement to processed forms. The cross-linked structure maintains integrity in sheet and gel formulations, enabling their use as medical materials and wound dressings without sacrificing strength
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 polymerized peptide provides a safe, stable, and functional alternative to natural collagen, offering improved physical properties and specific physiological functions, suitable for use in medical materials, wound dressings, and regenerative medicine.
Implementation Method 1
A collagen-like peptide having a triple-helical structure composed of triple strands of peptide chains containing a plurality of cysteine (Cys) residues is subjected to oxidative cross-linking to be produced as a polymerized peptide
Data Source
Figure 1~2A
Figure 2B~2D
Figure 2E~2G
AI summary
Although collagen is useful as a medical material, there exist risks of allergies and zoonoses when used in human. There, artificial collagens or the like are being considered as medical materials. However, the conventional artificial collagens were not necessarily satisfactory in terms of, for example, physical strength, denaturation due to heating, and inability of being processed into the shape of a sheet i.e. the conventional artificial collagens have been problematic in terms of practicality. The present invention is produced as a polymerized peptide prepared by oxidatively cross-linking collagen-like peptides having the triple-helical structure containing three peptide chains each containing multiple cysteine (Cys) residues. This polymerized peptide can be processed into a hydrogel and a thin membrane sheet before use, and is capable of imparting a particular physiological function such as cellular adhesion by incorporating functional amino acid sequences present on biological polymers. Further, the present invention provides a method for producing the abovementioned polymerized peptide and the like; and use applications employing the same, such as cell culturing, wound dressing, and compositions including regenerative medical materials and research materials.