The intensity of immune activation is linked to the level of CCR5 expression in human immunodeficiency virus type 1-infected persons.
Immunology
; 137(1): 89-97, 2012 Sep.
Article
em En
| MEDLINE
| ID: mdl-22862553
ABSTRACT
Immune activation is a main driver of AIDS- and non-AIDS-linked morbidities in the course of HIV-1 infection. As CCR5, the main HIV-1 co-receptor, is not only a chemokine receptor but also a co-activation molecule expressed at the surface of T cells, it could be directly involved in this immune activation. To test this hypothesis, we measured by flow cytometry the mean number of CCR5 molecules at the surface of non-activated CD4(+) T cells (CCR5 density), which determines the intensity of CCR5 signalling, and the percentage of CD8(+) T cells over-expressing CD38 (CD38 expression), a major marker of immune activation, in the blood of 67 HIV-1-infected, non-treated individuals. CCR5 density was correlated with CD38 expression independently of viral load (P=0.016). CCR5 density remained unchanged after highly active anti-retroviral therapy (HAART) introduction or cessation, whereas CD38 expression decreased and increased, respectively. Moreover, pre-therapeutic CCR5 density was highly predictive (r=0.736, P<10(-4) ) of residual CD38 over-expression after 9 months of HAART. Hence, CCR5 might play an immunological role in HIV-1 infection as a driver of immune activation. This could explain why CCR5 antagonists may have an inhibitory effect on immune activation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ativação Linfocitária
/
Linfócitos T CD4-Positivos
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Infecções por HIV
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HIV-1
/
Linfócitos T CD8-Positivos
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Receptores CCR5
/
ADP-Ribosil Ciclase 1
Limite:
Humans
Idioma:
En
Revista:
Immunology
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
França