Antisense Morpholino Oligomers Targeting Bacterial Virulence
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Solution Overview
Problem
The widespread use of antibiotics has led to antibiotic resistance in many bacterial pathogens, including multi-drug-resistant bacteria, making existing treatments ineffective and raising concerns about a post-antibiotic era, especially in biofilm-based infections which are resistant to conventional antimicrobial agents and host defenses.
Innovation Solution
The use of antisense morpholino oligomers specifically targeting bacterial virulence factors such as antibiotic resistance genes, biofilm formation proteins, and fatty acid biosynthesis proteins, conjugated with cell-penetrating peptides, to increase antibiotic susceptibility and disrupt biofilm formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antibiotics are used to treat bacterial infections, then bacterial infections can be controlled or eliminated, but antibiotic resistance develops in pathogenic bacteria
Solution Approach 1:
The patent extracts and targets specific virulence factors and resistance genes within bacterial pathogens using antisense oligomers. By identifying and eliminating these specific harmful genetic elements, the approach restores antibiotic effectiveness without requiring broad-spectrum antibiotic use, thereby preventing further resistance development.
Solution Approach 2:
Instead of using antibiotics to kill bacteria directly (conventional approach), the patent inverts the strategy by using antisense oligomers to silence specific bacterial genes that confer resistance and virulence. This indirect approach removes the resistance mechanism rather than attempting to overcome it with stronger antibiotics.
2Reliability
If antibiotics are used to treat infections, then bacterial growth is inhibited, but biofilm-based infections remain resistant to conventional antimicrobial agents
Solution Approach 1:
The patent applies local quality by targeting specific genes within biofilm-associated bacteria that are responsible for biofilm formation and resistance. By using antisense oligomers to silence these specific local genetic factors, the approach makes biofilm-based infections susceptible to conventional antibiotics without affecting the entire bacterial population.
Solution Approach 2:
The patent employs preliminary action by introducing antisense oligomers before antibiotic treatment to pre-silence resistance genes and biofilm formation factors. This preliminary genetic disruption prepares the bacteria to be more susceptible to subsequent antibiotic therapy, overcoming biofilm resistance before the antibiotic can be ineffective.
3Reliability
If multiple antibiotics are used to treat multi-drug-resistant bacteria, then treatment effectiveness may be achieved, but the complexity and cost of treatment increases
Solution Approach 1:
The patent applies universality by using a single class of antisense oligomer compounds that can target multiple different resistance genes and virulence factors. This multi-functional approach allows one treatment mechanism to address various resistance patterns, simplifying therapy compared to using multiple specialized antibiotics for different resistance mechanisms.
Solution Approach 2:
The patent merges the approach of genetic silencing with conventional antibiotic therapy. By combining antisense oligomers (which silence resistance genes) with standard antibiotics, the treatment achieves synergistic effectiveness against multi-drug-resistant bacteria while maintaining simpler administration than using multiple antibiotics alone.
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 antisense oligomers effectively increase the susceptibility of antibiotic-resistant bacteria to commonly used antibiotics and reduce biofilm formation, providing a potential therapeutic solution for infections caused by resistant pathogens.
Implementation Method 1
a targeting sequence of sufficient length and complementarity to specifically hybridize to a bacterial mRNA target sequence
Implementation Method 2
where the oligomer is conjugated to a cell-penetrating peptide (CPP)
Data Source
AI summary
Provided are antisense morpholino oligomers targeted against bacterial virulence factors such as genes that contribute to antibiotic resistance or biofilm formation, or genes associated with fatty acid biosynthesis, and related compositions and methods of using the oligomers and compositions, for instance, in the treatment of an infected mammalian subject.