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Dissecting How CD4 T Cells Are Lost During HIV Infection
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Mar 09 2016
Source: Cell Host Microbe. 19(3):280-291. -
Alternative Title:Cell Host Microbe
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Description:Although the replicative life cycle of HIV within CD4 T cells is understood in molecular detail, less is known about how this human retrovirus promotes the loss of CD4 T lymphocytes. It is this cell death process that drives clinical progression to acquired immune deficiency syndrome (AIDS). Recent studies have highlighted how abortive infection of resting and thus nonpermissive CD4 T cells in lymphoid tissues triggers a lethal innate immune response against the incomplete DNA products generated by inefficient viral reverse transcription in these cells. Sensing of these DNA fragments results in pyroptosis, a highly inflammatory form of programmed cell death, that potentially further perpetuates chronic inflammation and immune activation. As discussed here, these studies cast CD4 T cell death during HIV infection in a different light. Further, they identify drug targets that may be exploited to both block CD4 T cell demise and the chronic inflammatory response generated during pyroptosis.
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Source:Cell Host Microbe. 19(3):280-291.
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Pubmed ID:26962940
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Pubmed Central ID:PMC4835240
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