[PDF][PDF] Dissecting how CD4 T cells are lost during HIV infection

G Doitsh, WC Greene - Cell host & microbe, 2016 - cell.com
Cell host & microbe, 2016cell.com
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 …
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.
cell.com