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. 2008 Apr 25;320(5875):531-5.
doi: 10.1126/science.1155164.

Vaccinia virus uses macropinocytosis and apoptotic mimicry to enter host cells

Jason Mercer  1 , Ari Helenius
Affiliations

Vaccinia virus uses macropinocytosis and apoptotic mimicry to enter host cells

Jason Mercer et al. Science. .

Abstract

Viruses employ many different strategies to enter host cells. Vaccinia virus, a prototype poxvirus, enters cells in a pH-dependent fashion. Live cell imaging showed that fluorescent virus particles associated with and moved along filopodia to the cell body, where they were internalized after inducing the extrusion of large transient membrane blebs. p21-activated kinase 1 (PAK1) was activated by the virus, and the endocytic process had the general characteristics of macropinocytosis. The induction of blebs, the endocytic event, and infection were all critically dependent on the presence of exposed phosphatidylserine in the viral membrane, which suggests that vaccinia virus uses apoptotic mimicry to enter cells.

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  • Cell biology. A one-sided signal.
    Fairn GD, Grinstein S. Fairn GD, et al. Science. 2008 Apr 25;320(5875):458-60. doi: 10.1126/science.1158173. Science. 2008. PMID: 18436763 No abstract available.

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