HIV Nef is secreted in exosomes and triggers apoptosis in bystander CD4+ T cells.
HIV Nef is secreted in exosomes and triggers apoptosis in bystander CD4+ T cells.
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DOI:
10.1111/j.1600-0854.2009.01006.x
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发表时间:
2010-01
期刊:
影响因子:
--
通讯作者:
Peterlin BM
中科院分区:
文献类型:
--
作者:
Lenassi M;Cagney G;Liao M;Vaupotic T;Bartholomeeusen K;Cheng Y;Krogan NJ;Plemenitas A;Peterlin BM
The HIV accessory protein Nef is one of the earliest and most abundantly expressed viral proteins. It is also found in the serum of infected individuals (Caby et. al, 2005). Extracellular Nef protein has deleterious effects on CD4+ T cells (James et. al, 2004), the primary targets of HIV, and can suppress immunoglobulin class switching in bystander B cells (Qiao et. al, 2006). Nevertheless, the mode of exit of Nef from infected cells remains a conundrum. We found that Nef stimulates its own export via the release of exosomes from all cells examined. Depending on its intracellular location, these Nef exosomes form at the plasma membrane, late endosomes or both compartments in Jurkat, SupT1 and primary T cells, respectively. Nef release through exosomes is conserved also during HIV-1 infection of peripheral blood lymphocytes. Released Nef exosomes cause activation-induced cell death of resting PBLs in vitro. Thus, HIV-infected cells export Nef in bioactive vesicles, which facilitate the depletion of CD4+ T cells that is a hallmark of AIDS.
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影响因子:
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作者:
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通讯作者:
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