Oligothioetheramides for Antibacterial Membrane Disruption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The rapid evolution of bacterial resistance to existing antibiotics, coupled with the challenges of discovering new antibiotics due to structural complexity and poor intracellular penetration, necessitates the development of effective, non-peptidic, and non-traditional antibacterial agents.
Innovation Solution
The development of cationic oligothioetheramides (oligoTEAs) with specific alkyl thioether and tertiary amide structures, which incorporate cationic groups, alkyl groups, aromatic groups, and heterocyclic groups, allowing for precise tuning of hydrophobicity while maintaining charge, thereby selectively targeting and disrupting bacterial membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antibiotics are used to treat bacterial infections, then bacterial killing activity is achieved, but bacterial resistance develops rapidly
Solution Approach 1:
The patent changes the chemical parameters of antibacterial agents by using oligothioetheramides with specific backbone structures, cationic groups, and hydrophobic side chains. This parameter change enables membrane disruption activity while avoiding traditional antibiotic resistance mechanisms, as the compounds act through a different mode of action (membrane disruption rather than intracellular target inhibition).
Solution Approach 2:
Instead of targeting intracellular bacterial components (the traditional approach), the patent inverts the strategy by targeting the bacterial cell membrane itself. This inversion allows the compounds to kill bacteria through membrane disruption, a mechanism to which bacteria have not yet developed resistance.
2Reliability
If AMPs are used to disrupt bacterial membranes, then broad-spectrum antibacterial activity is achieved, but toxicology profile deteriorates
Solution Approach 1:
The patent applies local quality by designing oligothioetheramides with specific local structural features: cationic groups for membrane interaction, hydrophobic side chains for membrane insertion, and a rigid backbone for structural integrity. By optimizing the local composition and arrangement of these functional groups, the compounds achieve selective toxicity against bacteria while reducing harm to mammalian cells.
3Ease of manufacture
If synthetic polymers are used to mimic AMPs, then preparation cost is reduced, but sequence definition precision deteriorates
Solution Approach 1:
The patent uses segmentation by designing oligothioetheramides as discrete oligomeric units with defined sequences of cationic groups, hydrophobic side chains, and backbone structures. These segmented oligomers can be synthesized through controlled polymerization methods that maintain sequence definition while using cost-effective synthetic chemistry rather than expensive peptide synthesis.
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
OligoTEAs demonstrate potent antibacterial activity, selectively killing bacterial cells over mammalian cells by disrupting membrane structure, while maintaining stability and activity in the presence of serum, thus addressing the limitations of traditional antibiotics.
Implementation Method 1
Bilayer disruption is the primary mode of cell death and occurs via nonspecific interactions with the bacterial membrane leading to membrane permeabilization and cell death
Implementation Method 2
The sequence defined agents (e.g., compounds) are based on oligothioetheramide (oligoTEA) chemistry and contain cationic and hydrophobic domains
Implementation Method 3
The compounds comprise alkyl thioethers and tertiary amides. The tertiary amides further comprise cationic groups
Data Source
AI summary
Provided are oligothioetheramides (oligoTEAs) having a plurality of cationic groups, such as, for examples, cationic groups having guanidinium groups. The cationic oligoTEAs exhibit activity against gram-positive and gram-negative bacteria. The compounds can be used as antibacterial compounds against the same.