In:
Journal of Leukocyte Biology, Oxford University Press (OUP), Vol. 94, No. 4 ( 2013-10-01), p. 551-561
Abstract:
Recent studies indicate that murine Tregs highly express the ENTDP1, as well as the 5′-NT and thereby, suppress Teff function by extracellular adenosine production. Furthermore, CD73 seems to play a role as costimulatory molecule for T cell differentiation. In this study, we analyzed the expression of CD73 on peripheral and lymph nodal Teffs and Tregs in a cohort of 95 HIV patients at different stages of disease, including LTNP and ECs. In contrast to murine Tregs, CD73 was only expressed on a small minority (∼10%) of peripheral Tregs. In contrast, we see high expression of CD73 on peripheral CD8+ T cells. In HIV infection, CD73 is markedly reduced on all Teffs and Tregs, regardless of the memory subtype. On CD8+ T cells, a positive correlation between CD73 expression and CD4 counts (P=0.0003) was detected. CD73 expression on CD8+ T cells negatively correlated with HLA-DR ( & lt;0.0001) and PD1 (P=0.0457) expression. The lower CD73 expression on CD8+ T cells was partially reversible after initiation of ART (P=0.0016). Functionally, we observed that CD8+CD73+ T cells produce more IL-2 upon HIV-specific and unspecific stimulation than their CD73− counterparts and show a higher proliferative capacity. These data indicate that down-regulation of CD73 on CD8+ T cells correlates with immune activation and leads to functional deficits in HIV infection.
Type of Medium:
Online Resource
ISSN:
0741-5400
,
1938-3673
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2013
detail.hit.zdb_id:
2026833-6
SSG:
12
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