Multi-functional Peptides for Antibacterial and Immune Modulation
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Solution Overview
Problem
Current antibacterial peptides face challenges in effectively modulating immune cell activity and exhibiting broad-spectrum antibacterial activity against various bacteria, including resistance issues and limited structural similarities, which complicates their mechanism of action and application.
Innovation Solution
Development of novel multi-functional peptides comprising specific amino acid sequences (e.g., BOBWX1OU and X1 RWWUX1X2m) that combine antibacterial and immunomodulatory properties, targeting Formyl Peptide Receptors (FPR1 and FPR2) to activate immune responses and disrupt bacterial cell membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antibiotics are used to destroy microorganisms, then antibacterial activity is achieved, but microorganisms develop resistance
Solution Approach 1:
The patent changes the fundamental mechanism of action from conventional antibiotics to antimicrobial peptides that physically disrupt cell membranes. This parameter change in the mode of action prevents resistance development while maintaining antibacterial activity, as the physical membrane disruption mechanism is difficult for bacteria to resist
Solution Approach 2:
The patent creates composite peptide structures combining hydrophobic and hydrophilic regions, basic amino acids and aromatic residues. This composite structure enables simultaneous membrane binding and pore formation, achieving broad-spectrum antibacterial activity against both Gram-positive and Gram-negative bacteria without inducing resistance
2Reliability
If antibacterial peptides are designed to bind to cell membranes, then antibacterial activity is achieved, but immune cell activity modulation is insufficient
Solution Approach 1:
The patent designs peptides with dual functionality: they simultaneously exhibit antibacterial activity through membrane binding and modulate immune cell activity. The peptide structure includes both hydrophobic regions for membrane interaction and specific amino acid sequences that interact with immune cell receptors, enabling one peptide to perform multiple functions
Solution Approach 2:
The patent applies local quality by creating distinct functional regions within the peptide structure. The hydrophobic region targets bacterial membranes for antibacterial activity, while specific amino acid residues (such as basic amino acids and aromatic residues) in other regions interact with immune cell receptors to modulate immune responses, allowing different parts of the same peptide to perform different functions
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 peptides demonstrate high antibacterial activity against both Gram-negative and Gram-positive bacteria, while modulating immune cell activity, potentially offering improved resistance profiles and therapeutic applications in immune-related diseases and skin autoimmune conditions.
Implementation Method 1
antibacterial peptides have positively charged amino acid such as lysine, arginine and histidine and hydrophobic region. According to Shai-Matsuzaki-Huang (SMH) model, which is currently the most feasible hypotheses related to the action mechanism of antibacterial peptides, it is explained the features in amino acid sequence and mechanism of antibacterial peptide as follows: the hydrophilic region with positive charge binds to the cell membrane of a negatively charged bacterium
Implementation Method 2
when bind mainly to cell membranes 1) form ion channels in the cell membrane, which inhibit the energy generation of microorganisms
Implementation Method 3
2) create large holes in the cell membrane, resulting in cell death. the hydrophobic region the peptide bound to the cell membrane of the bacterium interacts with hydrophobic region of phospholipid of the cell membrane and forms pores on the cell membrane
Implementation Method 4
Formyl peptide receptor 1 (FPR1) and formyl peptide receptor 2 (FPR2) expressed in phagocytic cells such as neutrophils and monocytes play an important roles in the defense and resolution of inflammation of host against pathogen infection. The above receptors are known to bind to pertussis toxin-sensitive Gi proteins. The activation of FPR2 induces the dissociation of the Gβγ subunit from the Gαi subunit and the Gβγ subunit induces the activation of phospholipase Cβ or phosphoinositide 3-kinase
Data Source
AI summary
The present invention provides a novel multi-functional peptide that effectively regulates the activity of immune cells while also exhibiting excellent antibacterial activity against various bacteria such as Gram-negative bacteria and Gram-positive bacteria.