Single cell microfluidic studies of bacterial motility.

Area of Science:

• Microbiology
• Biophysics
• Biotechnology

Background:

• Bacterial gliding motility is a surface movement mechanism used by many species.
• The Agl-Glt system in Myxococcus xanthus is a novel macromolecular machinery crucial for this motility.
• Understanding the Agl-Glt system's interaction with the cytoskeleton (MreB) is key to explaining motility generation.

Purpose of the Study:

• To describe a new method for studying bacterial gliding motility.
• To enable high-resolution experiments using microfluidic and advanced microscopy techniques.
• To overcome limitations associated with traditional agar-based assays.

Main Methods:

• Development of a chitosan-functionalized microfluidic chamber for cell culture.
• Utilizing microfluidic techniques with inhibitors (A22, CCCP) to perturb motility.
• Employing advanced microscopy techniques like Total Internal Reflection Fluorescence (TIRF) and Atomic Force Microscopy (AFM).
• Implementing image processing for enhanced data quality.

Main Results:

• A straightforward procedure for creating a chitosan-functionalized microfluidic chamber is presented.
• The chamber facilitates bacterial gliding in liquid on a non-agar substrate.
• The setup supports high-resolution experiments for studying bacterial motility mechanisms.

Conclusions:

• The developed microfluidic chamber provides a robust platform for high-resolution studies of bacterial gliding motility.
• This method circumvents the disadvantages of agar-based assays.
• The procedure is potentially applicable to various bacterial systems adhering to chitosan.