Abstract:
:Characterization of immune responses induced by live attenuated simian immunodeficiency virus (SIV) strains may yield clues to the nature of protective immunity induced by this vaccine approach. We investigated the ability of CD8(+) T lymphocytes from rhesus macaques immunized with the live, attenuated SIV strain SIVmac239Deltanef or SIVmac239Delta3 to inhibit SIV replication. CD8(+) T lymphocytes from immunized animals were able to potently suppress SIV replication in autologous SIV-infected CD4(+) T cells. Suppression of SIV replication by unstimulated CD8(+) T cells required direct contact and was major histocompatibility complex (MHC) restricted. However, CD3-stimulated CD8(+) T cells produced soluble factors that inhibited SIV replication in an MHC-unrestricted fashion as much as 30-fold. Supernatants from stimulated CD8(+) T cells were also able to inhibit replication of both CCR5- and CXCR4-dependent human immunodeficiency virus type 1 (HIV-1) strains. Stimulation of CD8(+) cells with cognate cytotoxic T-lymphocyte epitopes also induced secretion of soluble factors able to inhibit SIV replication. Production of RANTES, macrophage inhibitory protein 1alpha (MIP-1alpha), or MIP-1beta from stimulated CD8(+) T cells of vaccinated animals was almost 10-fold higher than that from stimulated CD8(+) T cells of control animals. However, addition of antibodies that neutralize these beta-chemokines, either alone or in combination, only partly blocked inhibition of SIV and HIV replication by soluble factors produced by stimulated CD8(+) T cells. Our results indicate that inhibition of SIV replication by CD8(+) T cells from animals immunized with live attenuated SIV strains involves both MHC-restricted and -unrestricted mechanisms and that MHC-unrestricted inhibition of SIV replication is due principally to soluble factors other than RANTES, MIP-1alpha, and MIP-1beta.
journal_name
J Viroljournal_title
Journal of virologyauthors
Gauduin MC,Glickman RL,Means R,Johnson RPdoi
10.1128/JVI.72.8.6315-6324.1998subject
Has Abstractpub_date
1998-08-01 00:00:00pages
6315-24issue
8eissn
0022-538Xissn
1098-5514journal_volume
72pub_type
杂志文章abstract:UNLABELLED:The cytomegaloviruses (CMVs) are among the most genetically complex mammalian viruses, with viral genomes that often exceed 230 kbp. Manipulation of cytomegalovirus genomes is largely performed using infectious bacterial artificial chromosomes (BACs), which necessitates the maintenance of the viral genome in...
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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.73.12.10320-10328.1999
更新日期:1999-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/JVI.67.1.178-188.1993
更新日期:1993-01-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.64.10.4703-4708.1990
更新日期:1990-10-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:1976-11-01 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
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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:1982-05-01 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:2007-05-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.13.6162-6167.2000
更新日期:2000-07-01 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
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journal_title:Journal of virology
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.8.3.303-310.1971
更新日期:1971-09-01 00:00:00
abstract::China is facing a rapid upsurge in cases of human immunodeficiency virus type 1 (HIV-1) and hepatitis C virus (HCV) infection due to large numbers of paid blood donors (PBD), injection drug users (IDU), and sexual partners of infected individuals. In this report, a total of 236 HIV-1-positive blood samples were collec...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.24.13591-13599.2004
更新日期:2004-12-01 00:00:00
abstract::Humans differ substantially with respect to susceptibility to human immunodeficiency virus type 1 (HIV-1). We evaluated variants of nine host genes participating in the viral life cycle for their role in modulating HIV-1 infection. Alleles were assessed ex vivo for their impact on viral replication in purified CD4 T c...
journal_title:Journal of virology
pub_type: 杂志文章
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