Iron Chelator Antimicrobial Composition for Microbial Control
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Solution Overview
Problem
Current antimicrobial compositions are ineffective in controlling microbial growth due to limited bioavailability of iron, which is essential for microbial survival, and there is a need for compositions that can inhibit microbial growth in industrial aqueous systems and consumer goods while being environmentally friendly and cost-effective.
Innovation Solution
The development of antimicrobial compositions that include a high-affinity iron-selective chelating agent capable of competing with microbial siderophores, thereby reducing the bioavailability of iron and enhancing the activity of antimicrobial agents by stressing microorganisms, making them more vulnerable to the antimicrobial agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antimicrobial compositions are used, then microbial growth control is attempted, but the compositions are ineffective due to limited bioavailability of iron which is essential for microbial survival
Solution Approach 1:
The patent introduces iron chelators as intermediary substances that bind to iron ions, forming chelate complexes. These chelators act as mediators between the iron source and microbial siderophores, preventing microbes from accessing iron while maintaining iron in a non-toxic, bound state. The chelators compete with microbial siderophores for iron binding, effectively sequestering iron away from microorganisms.
Solution Approach 2:
The patent changes the chemical parameters of iron by introducing chelating agents that alter iron's bioavailability. By adjusting the chelator-to-iron ratio and selecting specific chelating agents with different binding affinities, the system modifies iron's chemical state from freely available to chelate-bound, thereby controlling microbial access to this essential nutrient without completely removing it from the system.
2Reliability
If higher doses of biocides are used to control microbial growth, then antimicrobial effect is enhanced, but environmental impact increases and cost increases
Solution Approach 1:
The patent applies preliminary action by first sequestering iron using chelators before introducing antimicrobial agents. This preliminary iron deprivation weakens microorganisms by removing an essential nutrient, making them more susceptible to subsequent antimicrobial treatment. This staged approach allows lower doses of biocides to achieve the same effect, reducing environmental impact and cost.
Solution Approach 2:
The patent converts the potentially harmful effect of iron (which supports microbial growth) into a beneficial tool for control. By using iron chelators, the system transforms iron from a nutrient that promotes microbial proliferation into a controlled element that, when sequestered, creates iron-deficiency stress in microbes, making them vulnerable to antimicrobial agents while avoiding the need for high biocide doses.
3Productivity
If iron is made more bioavailable to support microbial metabolic functions, then microbial growth is promoted, but antimicrobial control becomes more difficult
Solution Approach 1:
The patent employs iron chelators with multi-functionality: they bind iron with high affinity to prevent microbial uptake, they compete with siderophores for iron binding, and they maintain iron in a stable, non-toxic form. This single chelating agent performs multiple functions simultaneously - controlling iron bioavailability, preventing toxicity, and enhancing antimicrobial efficacy - making the system versatile and effective across different microbial threats.
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 compositions effectively inhibit microbial growth by reducing the bioavailability of iron, enhancing the potency of antimicrobial agents, and allowing for lower doses of biocides, which is environmentally beneficial and cost-effective.
Implementation Method 1
introducing a higher-affinity iron-selective chelating agent capable of competing with microbial siderophores. Because the iron chelator will compete with the siderophores and selectively form a complex with the iron
Data Source
Figure 1
AI summary
The present invention, therefore, is directed to an antimicrobial compositions that decreases the bioavailability of iron by introducing a higher-affinity iron-selective chelating agent capable of competing with microbial siderophores. In one aspect, the present invention relates to an antimicrobial composition including a potentiating antimicrobial composition including one or more antimicrobial agents and a chelator having a weight ratio of the antimicrobial agent to the chelator from about 1:1000 to about 1000:1.