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Abstract
HIV infection is associated with immune dysfunction, perturbation of immune-cell subsets and opportunistic infections. CD161++CD8+T-cells are a tissue-infiltrating population that produce IL17A, IL22, IFNγ and TNFα, cytokines important in mucosal immunity. In adults they dominantly express the semi-invariant TCR Vα7.2, the canonical feature of Mucosal Associated Invariant T-cells (MAIT) and have been recently implicated in host defence against pathogens. We analyzed the frequency and function of CD161++/MAIT-cells in peripheral blood and tissue from patients with early-stage or chronic-stage HIV infection. We show that the CD161++/MAIT-cell population is significantly decreased in early HIV infection and fails to recover despite otherwise successful treatment. We provide evidence that CD161++/MAIT-cells are not preferentially infected but may be depleted through diverse mechanisms including accumulation in tissues and activation-induced cell death. This loss may impact on mucosal defence and could be important in susceptibility to specific opportunistic infections in HIV.
Original language | English |
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Pages (from-to) | 951-61 |
Number of pages | 11 |
Journal | Blood |
Volume | 121 |
Issue number | 6 |
Early online date | 18 Dec 2012 |
DOIs | |
Publication status | Published - 7 Feb 2013 |
Keywords / Materials (for Non-textual outputs)
- HIV Infections
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