Linked Life Data

21775449

Source:http://linkedlifedata.com/resource/pubmed/id/21775449

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
19
pubmed:dateCreated
2011-9-12
pubmed:abstractText
Human immunodeficiency virus type 1 (HIV-1) Vpu enhances the release of viral particles from infected cells by targeting BST-2/tetherin, a cellular protein inhibiting virus release. The widely used HIV-1(NL4-3) Vpu functionally inactivates human BST-2 but not murine or monkey BST-2, leading to the notion that Vpu antagonism is species specific. Here we investigated the properties of the CXCR4-tropic simian-human immunodeficiency virus DH12 (SHIV(DH12)) and the CCR5-tropic SHIV(AD8), each of which carries vpu genes derived from different primary HIV-1 isolates. We found that virion release from infected rhesus peripheral blood mononuclear cells was enhanced to various degrees by the Vpu present in both SHIVs. Transfer of the SHIV(DH12) Vpu transmembrane domain to the HIV-1(NL4-3) Vpu conferred antagonizing activity against macaque BST-2. Inactivation of the SHIV(DH12) and SHIV(AD8) vpu genes impaired virus replication in 6 of 8 inoculated rhesus macaques, resulting in lower plasma viral RNA loads, slower losses of CD4(+) T cells, and delayed disease progression. The expanded host range of the SHIV(DH12) Vpu was not due to adaptation during passage in macaques but was an intrinsic property of the parental HIV-1(DH12) Vpu protein. These results demonstrate that the species-specific inhibition of BST-2 by HIV-1(NL4-3) Vpu is not characteristic of all HIV-1 Vpu proteins; some HIV-1 isolates encode a Vpu with a broader host range.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1098-5514
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
9708-15
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Some human immunodeficiency virus type 1 Vpu proteins are able to antagonize macaque BST-2 in vitro and in vivo: Vpu-negative simian-human immunodeficiency viruses are attenuated in vivo.
pubmed:affiliation
NIAID, NIH, Bethesda, MD 20892-0460, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Intramural