Bacterial Networks on Hydrophobic Micropillars

Area of Science:

• Microbiology
• Biotechnology
• Materials Science

Background:

• Bacteria form complex multicellular communities, with early colony formation and spatial organization crucial for intercellular communication.
• Understanding bacterial growth at the nanoscale is key to deciphering cell-cell interactions during initial colonization.
• Staphylococcus aureus (S. aureus) poses significant clinical challenges due to increasing antibiotic resistance.

Purpose of the Study:

• To present a simple, low-cost method for patterning S. aureus bacterial colonies.
• To control the three-dimensional (3D) architecture of growing bacterial colonies.
• To provide a platform for studying initial stages of bacterial community development and communication.

Main Methods:

• Utilized micropatterned poly(dimethyl siloxane) (PDMS) platforms leveraging surface wetting properties.
• Employed the physiological activities of S. aureus cells to guide colony formation.
• Fabricated connected networks of bacterial microcolonies with controlled growth.

Main Results:

• Successfully patterned S. aureus colonies and controlled their growth architecture.
• Demonstrated radial growth of patterned microcolonies from nanostrings into micrometer-thick rods.
• Achieved controlled formation of bacterial microcolony networks.

Conclusions:

• The developed method offers a simple, efficient, and low-cost approach to control bacterial colony architecture.
• This technique facilitates research into cell-cell communication mechanisms like quorum sensing and horizontal gene transfer.
• Provides a valuable platform for studying early-stage bacterial multicellularity and biofilm development.