Cell death by pyroptosis drives CD4 T-cell depletion in HIV-1 infection.
Cell death by pyroptosis drives CD4 T-cell depletion in HIV-1 infection.
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The pathway causing CD4 T-cell death in HIV-infected hosts remains poorly understood. Apoptosis has been proposed as the key mechanism for CD4 T-cell loss. We now show that caspase-3-mediated apoptosis accounts for the death of only a small fraction of productively infected cells. The remaining >95% of quiescent lymphoid CD4 T-cells die by caspase-1-mediated pyroptosis triggered by abortive viral infection. Pyroptosis corresponds to an intensely inflammatory form of programmed cell death where cytoplasmic contents and pro-inflammatory cytokines including IL-1β, are released. This death pathway thus links the two signature events in HIV infection––CD4 T-cell depletion and chronic inflammation––and creates a vicious pathogenic cycle where dying CD4 T-cells release inflammatory signals that attract more cells to die. This cycle can be broken by caspase-1 inhibitors shown to be safe in humans, raising the possibility of a new class of “anti-AIDS” therapeutics targeting the host rather than the virus.
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DOI:
10.3390/v3050586
发表时间:
2011-05
期刊:
Viruses
影响因子:
--
作者:
Février M;Dorgham K;Rebollo A
通讯作者:
Rebollo A
影响因子:
82.9
作者:
通讯作者:
--
DOI:
10.1073/pnas.94.5.1925
发表时间:
1997-03-04
影响因子:
11.1
作者:
Bleul, CC;Wu, LJ;Mackay, CR
通讯作者:
Mackay, CR
影响因子:
64.5
作者:
Cho YS;Challa S;Moquin D;Genga R;Ray TD;Guildford M;Chan FK
通讯作者:
Chan FK
影响因子:
32.4
作者:
Eckstein, DA;Penn, ML;Goldsmith, MA
通讯作者:
Goldsmith, MA