Abstract:
:Autophagy and the effects of its inhibition or induction were investigated during the entire infectious cycle of varicella-zoster virus (VZV), a human herpesvirus. As a baseline, we first enumerated the number of autophagosomes per cell after VZV infection compared with the number after induction of autophagy following serum starvation or treatment with tunicamycin or trehalose. Punctum induction by VZV was similar in degree to punctum induction by trehalose in uninfected cells. Treatment of infected cells with the autophagy inhibitor 3-methyladenine (3-MA) markedly reduced the viral titer, as determined by assays measuring both cell-free virus and infectious foci (P < 0.0001). We next examined a virion-enriched band purified by density gradient sedimentation and observed that treatment with 3-MA decreased the amount of VZV gE, while treatment with trehalose increased the amount of gE in the same band. Because VZV gE is the most abundant glycoprotein, we selected gE as a representative viral glycoprotein. To further investigate the role of autophagy in VZV glycoprotein biosynthesis as well as confirm the results obtained with 3-MA inhibition, we transfected cells with ATG5 small interfering RNA to block autophagosome formation. VZV-induced syncytium formation was markedly reduced by ATG5 knockdown (P < 0.0001). Further, we found that both expression and glycan processing of VZV gE were decreased after ATG5 knockdown, while expression of the nonglycosylated IE62 tegument protein was unchanged. Taken together, our cumulative results not only documented abundant autophagy within VZV-infected cells throughout the infectious cycle but also demonstrated that VZV-induced autophagy facilitated VZV glycoprotein biosynthesis and processing.
journal_name
J Viroljournal_title
Journal of virologyauthors
Buckingham EM,Carpenter JE,Jackson W,Grose Cdoi
10.1128/JVI.02646-13subject
Has Abstractpub_date
2014-01-01 00:00:00pages
890-902issue
2eissn
0022-538Xissn
1098-5514pii
JVI.02646-13journal_volume
88pub_type
杂志文章abstract:UNLABELLED:Transmission of chronic wasting disease (CWD) between cervids is influenced by the primary structure of the host cellular prion protein (PrP(C)). In white-tailed deer, PRNP alleles encode the polymorphisms Q95 G96 (wild type [wt]), Q95 S96 (referred to as the S96 allele), and H95 G96 (referred to as the H95 ...
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journal_title:Journal of virology
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.67.5.2879-2886.1993
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2012-04-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.10.2.220-227.1972
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journal_title:Journal of virology
pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2013-12-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.7.4122-4126.1995
更新日期:1995-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.7.2311-2315.1987
更新日期:1987-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2013-11-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.15.9786-9798.2005
更新日期:2005-08-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.50.3.739-747.1984
更新日期:1984-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01613-17
更新日期:2018-02-12 00:00:00