LGG-Derived Antimicrobial Peptides for Poultry Pathogen Control
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Solution Overview
Problem
Current treatments for avian pathogenic E. coli (APEC) and Salmonella infections in poultry are limited, leading to economic losses and human health risks, with the emergence of antibiotic-resistant strains complicating the issue.
Innovation Solution
A composition comprising an antimicrobial peptide with an amino acid sequence at least 80% identical to specific sequences (e.g., SEQ ID NO:21 or SEQ ID NO:32) is administered to treat or prevent bacterial infections, targeting bacterial membranes and potentially used in combination with antibiotics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antimicrobial drugs are used to treat APEC infections, then disease progression is halted, but antibiotic resistance develops
Solution Approach 1:
The patent changes the chemical parameters of the antimicrobial agent by using peptide-based compounds with specific amino acid sequences (SEQ ID NO:21 and SEQ ID NO:32) derived from LGG, which have different structural and functional properties compared to conventional antibiotics, thereby achieving antimicrobial activity while avoiding resistance mechanisms that target traditional antibiotic structures
Solution Approach 2:
The patent employs short-lived peptide molecules that are rapidly degraded by proteases in the gastrointestinal tract, creating a transient antimicrobial effect that prevents resistance development through repeated exposure to the same stable antibiotic structure, while still providing sufficient therapeutic benefit during the active period
2Quantity of substance
If conventional antibiotics are used to treat Salmonella infections, then bacterial load is reduced, but resistance spreads
Solution Approach 1:
The patent uses LGG-derived peptides as intermediary substances that mediate the antimicrobial effect against Salmonella through a different mechanism than conventional antibiotics, specifically by disrupting bacterial membranes and interfering with quorum sensing, thereby reducing bacterial load without selecting for classic antibiotic resistance patterns
Solution Approach 2:
The patent creates a composite therapeutic approach by combining LGG probiotic cells with their derived peptide products, where the live bacteria provide continuous peptide production and the purified peptides provide direct antimicrobial activity, creating a multi-component system that addresses Salmonella through multiple mechanisms simultaneously
3Productivity
If antibiotics are used in poultry industry, then APEC and Salmonella infections are treated, but economic losses from resistance continue
Solution Approach 1:
The patent applies LGG-derived peptides as a preventive measure in poultry feed and water before Salmonella and APEC infections establish themselves, creating a protective environment that prevents colonization and reduces the need for curative antibiotic treatments, thereby maintaining productivity while avoiding resistance development
Solution Approach 2:
The patent utilizes the probiotic LGG's natural ability to produce antimicrobial peptides as a self-service mechanism where the administered probiotic automatically generates its own therapeutic agents (the peptides) within the host animal, providing continuous protection without requiring external antibiotic intervention and reducing economic losses from resistance
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 antimicrobial peptides effectively reduce APEC and Salmonella loads in chickens, preventing colonization and infection, while minimizing the risk of antibiotic resistance development.
Implementation Method 1
The antimicrobial peptides effectively reduce APEC and Salmonella loads in chickens, preventing colonization and infection
Data Source
AI summary
Avian pathogenic bacteria, such as avian pathogenic E. coli (APEC) and Salmonella, cause severe infections in poultry products such as chickens and turkeys leading to food contamination and disease in humans. Previously, antibiotics were used to control bacterial infections and growth, contributing to more multi-drug resistant bacterial strains. The increased restrictions on the use of antibiotics in food-producing animals necessitate the development of new antibiotic alternative therapies. Here, the efficacy of novel antibacterial probiotics and peptides were tested against APEC and Salmonella infections in chickens. The alternative treatment methods disclosed herein are needed to combat these foodborne pathogens in avian animals and to help decrease the use of conventional antibiotics in poultry.