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A virus joins the movement. Intracellular pathogens
1Department of Microbiology and Immunology, Fairchild Science Building, Stanford University School of Medicine, Stanford, California 94305-5402, USA.
Current Biology : CB
|May 1, 1996
Summary
Vaccinia virus infection triggers the formation of actin tails within host cells. These structures resemble those used by pathogenic bacteria for cell-to-cell spread.
Area of Science:
- Microbiology
- Cell Biology
- Virology
Background:
- Vaccinia virus is a large DNA virus known for its complex replication cycle.
- Cell-to-cell spread is a critical mechanism for viral dissemination and pathogenesis.
- Actin-based motility is a known mechanism for the spread of certain intracellular pathogens.
Purpose of the Study:
- To investigate the mechanism of vaccinia virus cell-to-cell spread.
- To determine if vaccinia virus utilizes host cell actin dynamics for its dissemination.
Main Methods:
- Live-cell imaging of vaccinia virus-infected cells.
- Fluorescence microscopy to visualize actin structures.
- Immunofluorescence staining to identify viral and host cell components.
Main Results:
- Vaccinia virus induces the formation of actin tails in infected host cells.
- These actin tails share structural and dynamic similarities with those formed by intracellular bacteria.
- The actin tails appear to facilitate the movement of vaccinia virus particles between adjacent cells.
Conclusions:
- Vaccinia virus employs a novel mechanism for cell-to-cell spread involving actin tail formation.
- This mechanism is analogous to that used by intracellular bacteria, highlighting convergent evolution in pathogen dissemination strategies.
- Understanding this process could reveal new targets for antiviral therapies.