AFM review study on pox viruses and living cells

Area of Science:

• Biophysics
• Cell Biology
• Nanotechnology

Background:

• Studying single living cells requires advanced imaging techniques to observe dynamic processes at high resolution.
• Atomic force microscopy (AFM) has emerged as a powerful tool for nanoscale investigations of biological samples.

Purpose of the Study:

• To investigate the dynamic behavior of single living cells, including viral infection and replication, using high-speed AFM.
• To characterize the mechanical properties of living cells and their response to viral infection.

Main Methods:

• High-speed atomic force microscopy (AFM) with a lateral resolution of 30-40 nm was employed for long-term imaging of living cells over many hours.
• Cells were infected with pox viruses to observe specific cellular processes and viral liberation.
• AFM was also used to characterize pox viruses at a molecular level and to assess the mechanical resonance properties of cells.

Main Results:

• The study successfully observed the liberation of progeny virions from living, pox-infected cells, confirming earlier findings.
• Quasi-ordered structural details of pox viruses were resolved, though potential artifacts at very high resolutions were noted.
• Preliminary data on the mechanical resonance spectra of living cells indicated sufficient stiffness for high-speed imaging and suggested potential for cell-type specific characterization.

Conclusions:

• High-speed AFM is a viable technique for long-term, high-resolution imaging of living cells and their interactions with viruses.
• The observed cellular responses and viral dynamics provide insights into the host-pathogen relationship.
• The mechanical characterization of cells using AFM holds promise for future biomedical applications.