Tetrapeptides Stimulating Extracellular Matrix Synthesis
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Solution Overview
Problem
Current cosmetic peptides are limited in their ability to effectively stimulate the synthesis of extracellular matrix (ECM) molecules such as collagen I, fibronectin, and elastin, which are crucial for maintaining skin health and appearance, particularly in addressing aging-related skin imperfections.
Innovation Solution
Development of novel tetrapeptides, specifically X-(Xaa)nPG(Xaa)m-Z, where Xaa can be Alanine or Valine, with modifications at the N-terminal and C-terminal ends to enhance biodisponibility, that stimulate the synthesis of collagen I, collagen IV, fibronectin, and other ECM molecules, improving skin elasticity and firmness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional peptides are used to stimulate ECM synthesis, then collagen I and fibronectin synthesis is improved, but the peptides lack sufficient effectiveness and require high concentrations to show activity
Solution Approach 1:
The patent modifies the peptide sequence parameters by introducing specific amino acid combinations (Xaa1-Xaa2-PG-Xaa3-Xaa4) where Xaa1 and Xaa3 are hydrophobic amino acids (Ala, Val, Leu, Ile) and Xaa2 and Xaa4 are amino acids with acidic or neutral side chains. This parameter change in amino acid composition enables the peptide to bind to integrin receptors with higher affinity, achieving effective ECM synthesis stimulation at much lower concentrations (nanomolar range) compared to conventional peptides.
Solution Approach 2:
The patent creates peptide sequences that mimic natural ECM molecules and their binding sites. The tetrapeptide structure Xaa1-Xaa2-PG-Xaa3-Xaa4 copies the functional motifs found in collagen, fibronectin, and elastin, allowing it to interact with cell surface integrin receptors in a manner that replicates the natural signaling pathways for ECM synthesis, thereby achieving high effectiveness at low concentrations.
2Reliability
If existing peptide sequences are used, then some ECM synthesis stimulation is achieved, but the peptides do not exhibit sufficient activity at low concentrations for effective cosmetic application
Solution Approach 1:
The patent optimizes peptide parameters by selecting specific amino acid properties: hydrophobic amino acids (Ala, Val, Leu, Ile) at positions 1 and 3 provide binding affinity through integrin interaction, while amino acids with acidic or neutral side chains at positions 2 and 4 modulate the binding characteristics and cellular signaling. This parameter optimization enables nanomolar-level activity, making the peptides effective at cosmetic application concentrations.
3Reliability
If peptide sequences are modified to enhance activity, then ECM synthesis stimulation improves, but the complexity of peptide design and synthesis increases
Solution Approach 1:
The patent divides the peptide function into distinct structural elements: the N-terminal Xaa1-Xaa2 segment responsible for integrin binding, the central PG dipeptide core providing structural stability, and the C-terminal Xaa3-Xaa4 segment involved in cellular signaling. This segmentation allows independent optimization of each region's properties while maintaining overall peptide function, simplifying the design process compared to random sequence generation.
Solution Approach 2:
The patent creates a universal peptide framework Xaa1-Xaa2-PG-Xaa3-Xaa4 that can stimulate synthesis of multiple ECM molecules (collagen I, collagen IV, fibronectin, elastin) through a single structural motif. This multi-functional capability reduces the need to design separate peptides for each target molecule, thereby reducing overall design and synthesis complexity while maintaining high biological activity.
Data Source
AI summary
They have the general Formula X-(Xaa)nPG(Xaa)m-Z wherein Xaa is either A or V, either n=2 and m=0, or n=1 and m=1, at the N-terminal end X being selected from H, —CO—R1, —SO2—R1 or a biotinyl group, at the C-terminal end Z being selected from OH, OR1, NH2, NHR1 or NR1R2, and R1 and R2 being selected from an alkyle, aryle, aralkyle, alkylaryl, alkoxy, saccharide and aryloxy, said group having from 1 to 24 carbon atoms. Preferred peptide sequences are X-AVPG-Z and X-VPGA-Z. These tetrapeptides stimulate the synthesis of molecules constituting the dermal extracellular matrix, in particular collagen 1 and 4 and fibronectin, and can be used for a cosmetic treatment, in particular anti-aging, anti-wrinkle and fine lines, to improve the skin mechanical properties, firmness/tone/elasticity/flexibility, to increase skin density and volume, for a restructuring effect and/or to fight against stretch marks, and skin sagging.