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β-CD-Functionalized Microdevice for Rapid Capture and Release of Bacteria
Alexandra Perez-Anes1,2, Anna Szarpak-Jankowska1, Dorothée Jary2
1Grenoble Alpes University and Centre de Recherches sur les Macromolécules Végétales , 601, rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France.
ACS Applied Materials & Interfaces
|April 11, 2017
Summary
Researchers developed a novel method using beta-cyclodextrin (β-CD) to capture and release bacteria from liquid. This host-guest interaction strategy shows promise for pathogen concentration and detection in microfluidic devices.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Microfluidics
Background:
- Pathogen detection in liquids often requires a concentration step.
- Carbohydrates are effective affinity ligands for bacterial capture via lectin interactions.
- Cyclodextrin-immobilized substrates for selective bacterial trapping remain unexplored.
Purpose of the Study:
- To investigate the use of beta-cyclodextrin (β-CD) functionalized surfaces for bacterial capture and elution.
- To explore host-guest interactions for selective pathogen concentration.
- To assess the feasibility of integrating this method into microfluidic devices.
Main Methods:
- Quartz-crystal microbalance with dissipation monitoring experiments were employed.
- Functionalization of surfaces with β-cyclodextrin (β-CD) for bacterial capture.
- Elution of captured bacteria using a methylated β-CD derivative in aqueous solution.
Main Results:
- Rapid and efficient capture of bacterial cells in liquid was achieved using β-CD surfaces.
- Facile elution of bacteria was demonstrated with a competitive β-CD derivative.
- Proof-of-concept studies showed potential for β-CD-modified microfluidic devices in bacterial concentration.
Conclusions:
- The β-CD based host-guest interaction strategy enables efficient bacterial capture and elution under physiological conditions.
- This method can be integrated into microfluidic devices for pathogen concentration.
- The approach shows broad applicability for Gram-negative bacteria detection, exemplified by Escherichia coli.