Cytoskeletal disruption during human cytomegalovirus infection of human lung fibroblasts.

Abstract:

:Human cytomegalovirus (HCMV) infection causes a rapid, progressive disruption of the host cell cytoskeleton that correlates with actin depolymerization. Whole-mount (3D) electron microscopy was used to analyze the cytoskeleton of uninfected and HCMV-infected human lung fibroblast cells. Within 2 min of HCMV infection, localized areas of cytoskeletal disruption were observed. Disruption extended throughout the cytoplasm during the ensuing 45 to 90 min of infection and resulted in generalized cytoskeletal disorganization. Actin depolymerization occurred, as indicated by an increase in DNase I inhibition and alteration in the fluorescence pattern with rhodamine-conjugated phalloidin. Thus, actin appears to be the primary cytoskeletal target involved during HCMV infection. Fractionation of the virus seed inoculum showed that development of DNase I inhibitory activity in infected cells was associated only with the virus-containing fractions. Cytochalasin B treatment at early times of HCMV infection stimulated progeny virus production. This study demonstrates that rapid cytoskeletal disruption occurs during early periods of HCMV infection and indicates that actin depolymerization facilitates viral infectivity.

journal_name

Eur J Cell Biol

authors

Jones NL,Lewis JC,Kilpatrick BA

subject

Has Abstract

pub_date

1986-08-01 00:00:00

pages

304-12

issue

2

eissn

0171-9335

issn

1618-1298

journal_volume

41

pub_type

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