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Detection of Microorganisms Using Artificial Siderophore-FeIII Complex-Modified Substrates
Tomohiko Inomata1, Suguru Endo1, Hiroki Ido1
1Department of Life Science and Applied Chemistry, Graduate School of Science, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|January 22, 2024
Summary
Artificial siderophore-iron complexes immobilized on gold surfaces selectively capture microorganisms. This selective binding, based on ligand structure, enables potential use as microbe-capturing probes for detection and identification.
Area of Science:
- Coordination Chemistry
- Surface Science
- Microbiology
Background:
- Siderophores are crucial for microbial iron uptake.
- Artificial siderophores mimic natural ones for potential applications.
- Developing selective microbe-capturing agents is important for diagnostics.
Purpose of the Study:
- To synthesize and immobilize artificial siderophore-iron (FeIII) complexes on gold substrates.
- To investigate the microorganism adsorption capabilities of these modified surfaces.
- To explore the potential of these systems as microbe-capturing probes.
Main Methods:
- Modification of gold substrates with four types of artificial siderophore-FeIII complexes.
- Scanning electron microscopy (SEM) for visualizing microorganism adsorption.
- Quartz crystal microbalance (QCM) and AC impedance spectroscopy for quantifying adsorption.
Main Results:
- The artificial siderophore-FeIII complexes exhibited selective immobilization of various microorganisms on gold surfaces.
- Adsorption specificity correlated with the structural features (catecholate and hydroxamate groups) of the artificial siderophores.
- Observed specific interactions between the complexes and microbial surface receptors.
Conclusions:
- Artificial siderophore-FeIII complexes on gold surfaces demonstrate selective microorganism capture.
- The binding specificity is dictated by the artificial siderophore structure, mimicking natural siderophore-microbe interactions.
- These FeL/Au systems show promise as effective probes for rapid microbial detection and identification.
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