Leptin Receptor Affinity Peptide for MSC Recruitment
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Solution Overview
Problem
Mesenchymal stem cells (MSCs) have difficulty adhering to scaffold materials due to fluidity of body fluids, limiting their differentiation and repair capabilities, and existing methods fail to effectively recruit MSCs expressing the leptin receptor for tissue engineering applications.
Innovation Solution
A leptin receptor affinity peptide, identified through phage display technique, is used to specifically bind to MSCs and ligated with a collagen-binding domain, allowing it to anchor to collagen scaffolds, thereby improving MSC recruitment and retention on the scaffold material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MSCs are simply added to scaffold material or circulated in vivo, then the procedure is simple, but the MSCs cannot stay on the scaffold material for a long time due to fluidity of body fluid
Solution Approach 1:
The patent introduces an affinity peptide as an intermediary substance that specifically binds to the leptin receptor on MSC surfaces. This peptide acts as a molecular bridge between the scaffold material and MSCs, enabling specific adhesion without requiring complex surgical procedures for cell implantation. The affinity peptide modifies the scaffold surface to create specific binding sites for MSCs, resolving the contradiction between simple application and reliable retention.
2Reliability
If the scaffold material surface is modified with protein or polypeptide to improve MSC adhesion, then the repair effect is improved, but the complexity of scaffold preparation increases
Solution Approach 1:
The patent changes the chemical parameter of the scaffold surface by conjugating affinity peptides to it. This modification alters the surface properties of the scaffold from non-specific to specific binding capability. The affinity peptide conjugation transforms the scaffold into a targeted delivery system that selectively recruits MSCs expressing the leptin receptor, thereby improving repair effects while maintaining relatively simple preparation procedures.
3Strength
If a large number of different peptides are screened to find one with high affinity to leptin receptor, then the binding strength is improved, but the screening time and cost increase
Solution Approach 1:
The patent employs a phage display technology platform that provides built-in feedback mechanisms for peptide screening. The system uses leptin receptor-coated plates to selectively bind and enrich phages displaying high-affinity peptides through multiple rounds of selection. This feedback-driven enrichment process efficiently identifies optimal affinity peptides without requiring exhaustive screening of entire peptide libraries, thereby reducing time and resource consumption while achieving high binding 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 leptin receptor affinity peptide enhances the recruitment and retention of MSCs on collagen scaffolds, improving tissue injury repair and providing a basis for targeted therapy in tissue engineering.
Implementation Method 1
a phage display technique provides a mature solution. Numerous studies have proved that the phage display technique plays an important role in studying polypeptides or proteins in property, mutual recognition and interaction
Implementation Method 2
an affinity peptide with a strong binding strength to the leptin receptor can be found, the affinity peptide can be modified to the surface of the scaffold material so that the affinity peptide functions as a bridge to specifically bind to this portion of MSCs
Implementation Method 3
an application of a scaffold material to adsorb the MSCs for tissue injury repair and regeneration has been widely acknowledged
Data Source
AI summary
Disclosed in the present application are a leptin receptor affinity peptide and the use thereof. The sequence of the leptin receptor affinity peptide is as shown in SEQ ID NO. 1. Further disclosed in the present application is an affinity peptide with a collagen binding capacity, which affinity peptide comprises the leptin receptor affinity peptide and a short peptide with a collagen specific binding capacity, wherein the short peptide with the collagen specific binding capacity binds to the N-terminus of the leptin receptor affinity peptide. The affinity peptide of the present application has a high affinity with a leptin receptor and can specifically bind to MSCs. When the affinity peptide is connected to a biological material, the affinity peptide connected to the short peptide with the collagen specific binding capacity can specifically bind to a collagen scaffold, so that the recruitment of the biological material to MSCs expressing the leptin receptor on the surface is increased, a better tissue injury repair effect is obtained, and an experimental basis is provided for the research on MSCs in tissue engineering repair and targeted therapy.