Chemical force microscopy of single live cells

Area of Science:

• Biophysics
• Microbiology
• Surface Science

Background:

• Studying live cell surface properties at the subcellular level, especially in hydrated conditions, has been challenging.
• Understanding cell surface characteristics is crucial for various biological and medical applications.

Purpose of the Study:

• To demonstrate chemical force microscopy's capability in mapping live cell hydrophobicity with nanoscale resolution.
• To investigate the local hydrophobic character of medically important microorganisms, Aspergillus fumigatus and Mycobacterium bovis.

Main Methods:

• Chemical force microscopy (CFM) was employed to map surface hydrophobicity.
• The technique was validated using reference surfaces with known chemical properties.
• CFM was applied to probe the nanoscale hydrophobic features of live microbial cells.

Main Results:

• Nanoscale resolution mapping of live cell hydrophobicity was successfully achieved.
• Local hydrophobic variations on the surfaces of Aspergillus fumigatus and Mycobacterium bovis were identified.
• The study demonstrated the technique's applicability to a wide range of cell types.

Conclusions:

• Chemical force microscopy offers a novel approach for studying nanoscale surface properties of live cells.
• This method provides new opportunities for understanding the role of surface hydrophobicity in mediating cellular events.
• The findings have implications for microbiology, cell biology, and the development of new diagnostic or therapeutic strategies.