Local modulation of plus-end transport targets herpesvirus entry and egress in sensory axons

Proc Natl Acad Sci U S A. 2004 Nov 9;101(45):16034-9. doi: 10.1073/pnas.0404686101. Epub 2004 Oct 25.

Abstract

The core structures of many viruses move within cells by association with host cytoskeletal motor proteins; however, the mechanisms by which intracellular viral particles are transported toward sites of replication or the cell periphery at distinct stages of infection remain to be understood. The regulation of herpesvirus directional transport in sensory neurons was examined by tracking individual viral capsids within axons at multiple frames per s. After entry into axons, capsids underwent bidirectional and saltatory movement to the cell body independently of endosomes. A comparison of entry transport to a previous analysis of capsid axonal transport during egress revealed that capsid targeting in and out of cells occurs by modulation of plus-end, but not minus-end, motion. Entry transport was unperturbed by the presence of egressing virus from a prior infection, indicating that transport direction is not modulated globally by viral gene expression, but rather directly by a component of the viral particle.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Axonal Transport
  • Axons / virology*
  • Base Sequence
  • Capsid / physiology
  • Cells, Cultured
  • Chick Embryo
  • DNA Primers / genetics
  • Endosomes / physiology
  • Green Fluorescent Proteins / genetics
  • Green Fluorescent Proteins / metabolism
  • Herpesvirus 1, Suid / genetics
  • Herpesvirus 1, Suid / pathogenicity*
  • Herpesvirus 1, Suid / physiology
  • Models, Biological
  • Movement
  • Neurons, Afferent / virology*
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism
  • Viral Envelope Proteins / genetics
  • Viral Envelope Proteins / metabolism

Substances

  • DNA Primers
  • Recombinant Fusion Proteins
  • Viral Envelope Proteins
  • pseudorabies virus glycoproteins
  • Green Fluorescent Proteins