Impairment of CD1d-restricted natural killer T cells in chronic HIV type 1 clade C infection.

Abstract:

:Recent studies suggest that natural killer T (NKT) cells play a role in early antiviral pathogenesis and are rapidly depleted in chronic human immunodeficiency virus type 1 (HIV-1) clade B infection. We aimed to characterize the phenotypic and functional characteristics of NKT cells in HIV-1 clade C-infected Africans at different stages of HIV-1 disease. NKT cell frequencies, subsets, and ex vivo effector functions were assessed using multiparametric flow cytometry in a cross-sectional analysis of cryopreserved peripheral blood mononuclear cells from a cohort of 53 HIV-1 clade C chronically infected South African adults with CD4 T cell counts ranging from 94 to 839 cells/μl. We observed a significant decline of NKT cell numbers in advanced HIV-1 disease as well as activation and functional impairment of NKT cells in individuals with low CD4 T cell counts. The loss of NKT cells was largely driven by a reduction in the CD4(+) and CD4(-)CD8(-) NKT cell subsets in advanced disease. These findings demonstrate significant impairment of the NKT cell compartment in progressive HIV-1 clade C disease that might play an important role in the modulation of immune function in HIV-1 infection.

authors

Mureithi MW,Cohen K,Moodley R,Poole D,Mncube Z,Kasmar A,Moody DB,Goulder PJ,Walker BD,Altfeld M,Ndung'u T

doi

10.1089/AID.2010.0237

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

501-9

issue

5

eissn

0889-2229

issn

1931-8405

journal_volume

27

pub_type

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