Airway CD8+CD161++TCRvα7.2+ T Cell Depletion During Untreated HIV Infection Targets CD103 Expressing Cells

Mvaya, Leonard, Mwale, Andrew, Hummel, Annemarie, Phiri, Joseph, Kamng'ona, Raphael, Mzinza, David, Chimbayo, Elizabeth, Malamba, Rose, Kankwatira, Anstead, Mwandumba, Henry ORCID: https://orcid.org/0000-0003-4470-3608 and Jambo, Kondwani ORCID: https://orcid.org/0000-0002-3195-2210 (2019) 'Airway CD8+CD161++TCRvα7.2+ T Cell Depletion During Untreated HIV Infection Targets CD103 Expressing Cells'. Frontiers in immunology, Vol 10, p. 2003.

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Abstract

HIV-infected adults are at an increased risk to lower respiratory tract infections (LRTIs). CD8CD161TCRvα7.2 T cells are an innate-like T cell subset that are thought to play an important role in early defense against pathogens in the respiratory tract. HIV infection leads to irreversible depletion of these cells in peripheral blood, however, its impact on this subset in the human airway is still unclear. Here, we show presence of CD103 expressing CD8CD161TCRvα7.2 T cells in the airway that exhibited a distinct cytokine functional profile compared to their CD103 airway counterparts and those from peripheral blood. These CD103 expressing airway CD8CD161TCRvα7.2 T cells were selectively depleted in untreated HIV-infected adults compared to healthy controls. Their frequency was positively correlated with frequency of airway CD4 T cells. Furthermore, the frequency of airway CD8CD161TCRvα7.2 T cells was also inversely correlated with HIV plasma viral load, while suppressive antiretroviral therapy (ART) resulted in restoration of airway CD8CD161TCRvα7.2 T cells. Our findings show that CD103 expressing airway CD8CD161TCRvα7.2 T cells are functionally distinct and are preferentially depleted during untreated asymptomatic HIV infection. Depletion of CD103 expressing airway CD8CD161TCRvα7.2 T cells, at a major portal of pathogen entry, could partly contribute to the increased propensity for opportunistic LRTIs observed in untreated HIV-infected adults.

Item Type:	Article
Subjects:	WC Communicable Diseases > Virus Diseases > Acquired Immunodeficiency Syndrome. HIV Infections > WC 503 Acquired immunodeficiency syndrome. HIV infections WF Respiratory System > WF 140 Diseases of the respiratory system (General) WF Respiratory System > Lungs > WF 600 Lungs
Faculty: Department:	Clinical Sciences & International Health > Clinical Sciences Department Clinical Sciences & International Health > Malawi-Liverpool-Wellcome Programme (MLW)
Digital Object Identifer (DOI):	https://doi.org/10.3389/fimmu.2019.02003
Depositing User:	Julie Franco
Date Deposited:	23 Sep 2019 14:18
Last Modified:	21 Nov 2019 15:31
URI:	https://archive.lstmed.ac.uk/id/eprint/12464

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