Article (Scientific journals)
In vivo importance of heparan sulfate-binding glycoproteins for murid herpesvirus-4 infection.
Gillet, Laurent; May, Janet S; Stevenson, Philip G
2009In Journal of General Virology, 90 (Pt 3), p. 602-13
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Keywords :
Animals; Cell Line; Cricetinae; Female; Glycoproteins/genetics/metabolism; Heparitin Sulfate/metabolism; Kidney/cytology/virology; Mice; NIH 3T3 Cells; Protein Binding; Receptors, Virus/metabolism; Rhadinovirus/genetics/metabolism/pathogenicity; Viral Envelope Proteins/genetics/metabolism
Abstract :
[en] Many herpesviruses bind to heparan sulfate (HS). Murid herpesvirus-4 (MuHV-4) does so via its envelope glycoproteins gp70 and gH/gL. MuHV-4 gp150 further regulates an HS-independent interaction to make that HS-dependent too. Cell binding by MuHV-4 virions is consequently strongly HS-dependent. Gp70 and gH/gL show some in vitro redundancy: an antibody-mediated blockade of HS binding by one is well tolerated, whereas a blockade of both severely impairs infection. In order to understand the importance of HS binding for MuHV-4 in vivo, we generated mutants lacking both gL and gp70. As expected, gL(-)gp70(-) MuHV-4 showed very poor cell binding. It infected mice at high dose but not at low dose, indicating defective host entry. But once entry occurred, host colonization, which for MuHV-4 is relatively independent of the infection dose, was remarkably normal. The gL(-)gp70(-) entry deficit was much greater than that of gL(-) or gp70(-) single knockouts. And gp150 disruption, which allows HS-independent cell binding, largely rescued the gL(-)gp70(-) cell binding and host entry deficits. Thus, it appeared that MuHV-4 HS binding is important in vivo, principally for efficient host entry.
Disciplines :
Microbiology
Author, co-author :
Gillet, Laurent  ;  Université de Liège - ULiège > Immunologie et vaccinologie
May, Janet S
Stevenson, Philip G
Language :
English
Title :
In vivo importance of heparan sulfate-binding glycoproteins for murid herpesvirus-4 infection.
Publication date :
2009
Journal title :
Journal of General Virology
ISSN :
0022-1317
eISSN :
1465-2099
Publisher :
Society for General Microbiology, London, United Kingdom
Volume :
90
Issue :
Pt 3
Pages :
602-13
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 November 2010

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