Amphiphilic Peptide Hydrogels for Tissue Engineering
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Solution Overview
Problem
There is a need for materials in tissue engineering that are easily tunable and have suitable biochemical and physiological properties to meet the mechanical and structural requirements of specific tissues, while being biocompatible and thermally stable.
Innovation Solution
A purified amphiphilic peptide formulation with a folding group of charged and hydrophobic amino acid residues arranged in a substantially alternating pattern, capable of self-assembling into a hydrogel in an aqueous biocompatible solution, with a net charge between −7 and +11, and a buffer containing ionic salts and biological buffering agents to induce self-assembly and maintain thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If amphiphilic peptides are administered in concentrated form to target tissues, then offsite toxicity is reduced and localized therapeutic effects are enabled, but the complexity of formulation and delivery increases
Solution Approach 1:
The peptide formulation is segmented into distinct functional components: amphiphilic peptides with specific folding groups, buffer systems with controlled ionic strength, and optional active agents. This segmentation allows each component to be optimized independently for its specific function while maintaining overall formulation simplicity
Solution Approach 2:
The amphiphilic peptides self-assemble into hydrogels at the target site through spontaneous aggregation driven by their alternating charged and hydrophobic residues, eliminating the need for complex external assembly mechanisms or additional formulation steps to achieve localized concentration
2Stability of the object's composition
If peptides are designed with alternating charged and hydrophobic amino acid residues to enable self-assembly, then hydrogel formation is achieved, but the molecular design complexity increases
Solution Approach 1:
The peptide sequence parameters are systematically controlled with specific constraints: alternating pattern of charged and hydrophobic residues, folding group length of 2-50 residues, net charge between -7 and +11, and optional turn sequences. These parameter ranges provide a standardized design framework that ensures self-assembly while limiting design complexity
Solution Approach 2:
The peptide incorporates multiple amino acid residue types with distinct properties (charged, hydrophobic, and optionally turn-inducing residues) arranged in a composite alternating pattern, creating a multifunctional molecule that simultaneously enables folding, self-assembly, and hydrogel formation
3Reliability
If buffer systems with ionic salts are used to induce self-assembly and maintain thermal stability, then hydrogel formation is enhanced, but the formulation complexity increases
Solution Approach 1:
The buffer system parameters are controlled within specific ranges: ionic strength of 0.1-1.0 M, pH 6.0-8.0, and temperature 20-37°C. These parameter specifications provide a standardized formulation framework that reliably induces self-assembly while maintaining thermal stability without requiring complex buffer compositions
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 peptide formulation forms a thermally stable, biocompatible hydrogel that can be administered in a concentrated form to target tissues, reducing offsite toxicity and enabling localized therapeutic effects, with antimicrobial, antiviral, and antifungal properties, suitable for tissue engineering applications.
Implementation Method 1
The peptide may be configured to self-assemble into a hydrogel
Implementation Method 2
a folding group having a plurality of charged amino acid residues and hydrophobic amino acid residues arranged in a substantially alternating pattern
Implementation Method 3
a folding group having a plurality of charged amino acid residues and hydrophobic amino acid residues arranged in a substantially alternating pattern
Implementation Method 4
a buffer containing ionic salts and biological buffering agents to induce self-assembly and maintain thermal stability
Data Source
AI summary
Preparations including a purified amphiphilic peptide including a folding group having a plurality of charged amino acid residues and hydrophobic amino acid residues arranged in a substantially alternating pattern and a turn sequence, configured to self-assemble into a hydrogel and being thermally stable are disclosed. The peptide may have a net charge of from −7 to +11. The peptide may include an effective amount of counterions. The preparation may include between 0.5% w/v and 6.0% w/v of the peptide. The preparation may include a biocompatible solution. The preparation may include a buffer. The buffer may include an effective amount of an ionic salt and a biological buffering agent to form the hydrogel. Kits including the preparation are also disclosed. The kits may include a mixing device and/or a delivery device. Medical or surgical tools having at least a portion of an exterior surface coated with the hydrogel are also disclosed.