Abstract:
:Failure of antiretroviral therapy to eradicate HIV, even in individuals who suppress the virus to undetectable levels, is a consequence of persistent infection in latently infected cells and within anatomical reservoirs. Support for the notion that the lungs are distinct anatomical reservoirs of HIV comes from a spectrum of studies that have documented different levels of HIV within the lungs compared with the peripheral blood. Different HIV variants have also been found within these two compartments, including variants with distinct antiretroviral resistance mutations. Given that macrophages are long-lived cellular reservoirs of HIV because of their resistance to apoptosis, HIV can persist for prolonged periods within alveolar macrophages that are abundant within the lungs. Furthermore, the large number of cells in close proximity within the lungs provides fertile grounds for cell-to-cell spread of HIV. Distinct immunological pressures in the lungs compared with the peripheral blood likely account for differences in HIV levels within these two compartments in addition to the finding of different variants within these regions. Furthermore, coinfections and tobacco may serve as local stimuli to induce further HIV replication within the lungs. Herein, we review the evidence supporting the notion that lungs are important reservoirs of HIV infection, and we discuss various factors influencing HIV burden within these reservoirs.
journal_name
Rev Med Viroljournal_title
Reviews in medical virologyauthors
Costiniuk CT,Jenabian MAdoi
10.1002/rmv.1772subject
Has Abstractpub_date
2014-01-01 00:00:00pages
35-54issue
1eissn
1052-9276issn
1099-1654journal_volume
24pub_type
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