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J. Virol., 06 1997, 4679-4693, Vol 71, No. 6
IV Sandoval and L Carrasco
Infection of Vero cells with poliovirus results in complete disassembly of
the Golgi complex. Milestones of the process of disassembly are the release
to the cytosol of the beta-COP bound to Golgi membranes, the disruption of
the cis-Golgi network into fragments scattered throughout the cytoplasm,
and the disassembly of the stacked cisternae by a process mediated by long
tubular structures. Transient expression of the viral protein 2B in COS-7
cells also causes the disassembly of the Golgi complex by a process
preceded by the accumulation of the protein in the Golgi area. Vero cells
infected for 3 h show no recognizable Golgi complexes at the
ultrastructural level and display an enormously swollen endoplasmic
reticulum (ER) with extensive areas of its surface heavily coated.
Ro-090179 (Ro), a flavonoid isolated from the herb Agastache rugosa,
provokes the specific swelling and disruption of the Golgi complex and
strongly inhibits poliovirus infection. Ro provokes the swelling and the
disruption of the stacked cisternae and trans- Golgi elements without
affecting the cis-most Golgi cisternae much. Moreover, Ro inhibits the
fusion of the Golgi complex with the ER in cells treated with brefeldin A
and provokes the accumulation of the intermediate compartment membrane
protein p58 into ERD2-positive Golgi elements but has no effect on the
anterograde transport involved in protein secretion. Our results indicate
that the secretory pathway and specifically the Golgi complex are
preferential targets of poliovirus.
Copyright © 1997, American Society for Microbiology
Poliovirus infection and expression of the poliovirus protein 2B provoke the disassembly of the Golgi complex, the organelle target for the antipoliovirus drug Ro-090179
Centro de Biologia Molecular, Facultad de Ciencias, Universidad Autonoma de Madrid, Cantoblanco, Spain.
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