Advertisement

 

 

CD4+ T cells with an activated and exhausted phenotype distinguish immunodeficiency during aviremic HIV-2 infection.

CD4+ T cells with an activated and exhausted phenotype distinguish immunodeficiency during aviremic HIV-2 infection.
Author Information (click to view)

Buggert M, Frederiksen J, Lund O, Betts MR, Biague A, Nielsen M, Tauriainen J, Norrgren H, Medstrand P, Karlsson AC, Jansson M, ,


Buggert M, Frederiksen J, Lund O, Betts MR, Biague A, Nielsen M, Tauriainen J, Norrgren H, Medstrand P, Karlsson AC, Jansson M, , (click to view)

Buggert M, Frederiksen J, Lund O, Betts MR, Biague A, Nielsen M, Tauriainen J, Norrgren H, Medstrand P, Karlsson AC, Jansson M, ,

Advertisement
Share on FacebookTweet about this on TwitterShare on LinkedIn

AIDS (London, England) 30(16) 2415-2426

Abstract
OBJECTIVE
HIV type 2 (HIV-2) represents an attenuated form of HIV, in which many infected individuals remain ‘aviremic’ without antiretroviral therapy. However, aviremic HIV-2 disease progression exists, and in the current study, we therefore aimed to examine if specific pathological characteristics of CD4 T cells are linked to such outcome.

DESIGN
HIV-seronegative (n = 25), HIV type 1 (HIV-1) (n = 33), HIV-2 (n = 39, of whom 26 were aviremic), and HIV-1/2 dually (HIV-D) (n = 13)-infected study participants were enrolled from an occupational cohort in Guinea-Bissau.

METHODS
CD4 T-cell differentiation, activation, exhaustion, senescence, and transcription factors were assessed by polychromatic flow cytometry. Multidimensional clustering bioinformatic tools were used to identify CD4 T-cell subpopulations linked to infection type and disease stage.

RESULTS
HIV-2-infected individuals had early and late-differentiated CD4 T-cell clusters with lower activation (CD38HLA-DR) and exhaustion programmed death-1 (PD-1) than HIV-1 and HIV-D-infected individuals. We also noted that aviremic HIV-2-infected individuals possessed fewer individuals. CD4 T cells with pathological signs compared to other HIV-infected groups. Still, compared to HIV-seronegative individuals, aviremic HIV-2-infected individuals had T-bet CD4 T cells that showed elevated immune activation/exhaustion, and particularly the frequencies of PD-1 cells were associated with a suboptimal percentage of CD4 T cells.

CONCLUSION
Increased frequencies of CD4 T cells with an activated/exhausted phenotype correlate with exacerbated immunodeficiency in aviremic HIV-2-infected individuals. Thus, these findings encourage studies on the introduction of antiretroviral therapy also to individuals with aviremic HIV-2 infection.

Submit a Comment

Your email address will not be published. Required fields are marked *

eleven + fifteen =

[ HIDE/SHOW ]