Liquid-Cell Electron Tomography of Biological Systems

Area of Science:

• Materials Science
• Microscopy
• Infectious Diseases

Background:

• Liquid-cell electron microscopy (LCEM) allows real-time imaging of materials and biological systems.
• Current LCEM techniques are limited to two-dimensional (2-D) observations.
• There is a need for higher-dimensional imaging in liquid environments.

Purpose of the Study:

• To introduce a novel 3-D imaging technique for materials in liquid.
• To apply this technique for observing and quantifying host-pathogen interactions in solution.
• To gain new insights into bacteriophage-host bacterium interactions.

Main Methods:

• Development of liquid-cell electron tomography (LCET).
• Utilizing LCET within the vacuum system of an electron microscope.
• Analyzing genetic content of phage pathogens.

Main Results:

• Demonstrated 3-D imaging of materials enclosed in liquid.
• Successfully observed and quantified host-pathogen interactions in solution.
• Revealed structural features of infectious phage units and new host interaction paradigms.

Conclusions:

• LCET provides a technological advancement for in situ imaging.
• This method offers a new level of dimensionality beyond 2-D imaging.
• The study offers new insights into bacteriophage-host interactions.