EHV-1 glycoprotein D (EHV-1 gD) is required for virus entry and cell-cell fusion, and an EHV-1 gD deletion mutant induces a protective immune response in mice

EHV-1 glycoprotein D (EHV-1 gD) is required for virus entry and cell-cell fusion, and an EHV-1 gD... Insertional mutagenesis was used to construct an equine herpesvirus 1 (EHV-1) mutant in which the open reading frame for glycoprotein D was replaced by a lacZ cassette. This gD deletion mutant (ΔgD EHV-1) was unable to infect normally permissive RK cells in culture, but could be propagated in an EHV-1 gD-expressing cell line (RK/gD). Phenotypically complemented ΔgD EHV-1 was able to infect RK cells, but did not spread to form syncytial plaques as seen with wild type EHV-1 or with ΔgD EHV-1 infection of RK/gD cell cultures. Therefore EHV-1 gD is required for virus entry and for cell-cell fusion. The phenotypically complemented ΔgD EHV-1 had very low pathogenicity in a mouse model of EHV-1 respiratory disease, compared to a fully replication-competent EHV-1 reporter virus ( lacZ 62/63 EHV-1). Intranasal or intramuscular inoculation of mice with ΔgD EHV-1 induced protective immune responses that were similar to those elicited in mice inoculated with lacZ 62/63 EHV-1 and greater than those following inoculation with UV-inactivated virus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

EHV-1 glycoprotein D (EHV-1 gD) is required for virus entry and cell-cell fusion, and an EHV-1 gD deletion mutant induces a protective immune response in mice

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Publisher
Springer-Verlag
Copyright
Copyright © Wien by 2000 Springer-Verlag/
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050070027
Publisher site
See Article on Publisher Site

Abstract

Insertional mutagenesis was used to construct an equine herpesvirus 1 (EHV-1) mutant in which the open reading frame for glycoprotein D was replaced by a lacZ cassette. This gD deletion mutant (ΔgD EHV-1) was unable to infect normally permissive RK cells in culture, but could be propagated in an EHV-1 gD-expressing cell line (RK/gD). Phenotypically complemented ΔgD EHV-1 was able to infect RK cells, but did not spread to form syncytial plaques as seen with wild type EHV-1 or with ΔgD EHV-1 infection of RK/gD cell cultures. Therefore EHV-1 gD is required for virus entry and for cell-cell fusion. The phenotypically complemented ΔgD EHV-1 had very low pathogenicity in a mouse model of EHV-1 respiratory disease, compared to a fully replication-competent EHV-1 reporter virus ( lacZ 62/63 EHV-1). Intranasal or intramuscular inoculation of mice with ΔgD EHV-1 induced protective immune responses that were similar to those elicited in mice inoculated with lacZ 62/63 EHV-1 and greater than those following inoculation with UV-inactivated virus.

Journal

Archives of VirologySpringer Journals

Published: Dec 1, 2000

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