Abstract
Interleukin (IL)-7 and its receptor (IL-7Rα) play important roles in regulating lymphopoiesis. Previous studies have reported that human immunodeficiency virus-1 (HIV-1) viraemia affects the expression of IL-7Rα, but its effects on CD4+ and CD8+ T cell memory subsets have not been studied. Using eight-colour flow cytometry, we compared the immunophenotypic patterns of CD4+ and CD8+ T cell subsets expressing IL-7Rα and activation markers, as well as circulating IL-7 levels, in three well-defined groups of HIV-1-infected subjects: successfully treated, viraemic and long-term non-progressor (LTNP). Compared with successfully treated and LTNP subjects, viraemic patients had reduced expression of IL-7Rα on both CD4+ and CD8+ T cells, particularly on central and effector memory T cell compartments, and substantially elevated expression of activation markers on CD8+ T cell subsets. Circulating IL-7 levels were correlated negatively with the number of CD4+ and CD8+ T cell subsets expressing IL-7Rα; these associations were stronger with CD4+ T cell subsets and mainly with central and effector memory cells. The expression of activation markers on CD4+ and CD8+ cell T subsets was not related to circulating IL-7 levels. A strong negative correlation was observed between central memory CD4+ or CD8+ T cells expressing IL-7Rα and those expressing activation markers, independently of IL-7 levels. Collectively, these results provide further insight on the role of unsuppressed viral load in disrupting the IL-7/IL-7Rα system and contributing to HIV-1 disease progression.
| Original language | English |
|---|---|
| Pages (from-to) | 72-80 |
| Number of pages | 9 |
| Journal | Clinical and Experimental Immunology |
| Volume | 152 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Apr 2008 |
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Keywords
- Activation markers
- HIV-1
- Interleukin-7
- Interleukin-7 receptor
- T cell subsets
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology
Cite this
Persistent human immunodeficiency virus-1 antigenaemia affects the expression of interleukin-7Rα on central and effector memory CD4 + and CD8+ T cell subsets. / Mercier, F.; Boulassel, M. R.; Yassine-Diab, B.; Tremblay, C.; Bernard, N. F.; Sekaly, R. P.; Routy, J. P.
In: Clinical and Experimental Immunology, Vol. 152, No. 1, 04.2008, p. 72-80.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Persistent human immunodeficiency virus-1 antigenaemia affects the expression of interleukin-7Rα on central and effector memory CD4 + and CD8+ T cell subsets
AU - Mercier, F.
AU - Boulassel, M. R.
AU - Yassine-Diab, B.
AU - Tremblay, C.
AU - Bernard, N. F.
AU - Sekaly, R. P.
AU - Routy, J. P.
PY - 2008/4
Y1 - 2008/4
N2 - Interleukin (IL)-7 and its receptor (IL-7Rα) play important roles in regulating lymphopoiesis. Previous studies have reported that human immunodeficiency virus-1 (HIV-1) viraemia affects the expression of IL-7Rα, but its effects on CD4+ and CD8+ T cell memory subsets have not been studied. Using eight-colour flow cytometry, we compared the immunophenotypic patterns of CD4+ and CD8+ T cell subsets expressing IL-7Rα and activation markers, as well as circulating IL-7 levels, in three well-defined groups of HIV-1-infected subjects: successfully treated, viraemic and long-term non-progressor (LTNP). Compared with successfully treated and LTNP subjects, viraemic patients had reduced expression of IL-7Rα on both CD4+ and CD8+ T cells, particularly on central and effector memory T cell compartments, and substantially elevated expression of activation markers on CD8+ T cell subsets. Circulating IL-7 levels were correlated negatively with the number of CD4+ and CD8+ T cell subsets expressing IL-7Rα; these associations were stronger with CD4+ T cell subsets and mainly with central and effector memory cells. The expression of activation markers on CD4+ and CD8+ cell T subsets was not related to circulating IL-7 levels. A strong negative correlation was observed between central memory CD4+ or CD8+ T cells expressing IL-7Rα and those expressing activation markers, independently of IL-7 levels. Collectively, these results provide further insight on the role of unsuppressed viral load in disrupting the IL-7/IL-7Rα system and contributing to HIV-1 disease progression.
AB - Interleukin (IL)-7 and its receptor (IL-7Rα) play important roles in regulating lymphopoiesis. Previous studies have reported that human immunodeficiency virus-1 (HIV-1) viraemia affects the expression of IL-7Rα, but its effects on CD4+ and CD8+ T cell memory subsets have not been studied. Using eight-colour flow cytometry, we compared the immunophenotypic patterns of CD4+ and CD8+ T cell subsets expressing IL-7Rα and activation markers, as well as circulating IL-7 levels, in three well-defined groups of HIV-1-infected subjects: successfully treated, viraemic and long-term non-progressor (LTNP). Compared with successfully treated and LTNP subjects, viraemic patients had reduced expression of IL-7Rα on both CD4+ and CD8+ T cells, particularly on central and effector memory T cell compartments, and substantially elevated expression of activation markers on CD8+ T cell subsets. Circulating IL-7 levels were correlated negatively with the number of CD4+ and CD8+ T cell subsets expressing IL-7Rα; these associations were stronger with CD4+ T cell subsets and mainly with central and effector memory cells. The expression of activation markers on CD4+ and CD8+ cell T subsets was not related to circulating IL-7 levels. A strong negative correlation was observed between central memory CD4+ or CD8+ T cells expressing IL-7Rα and those expressing activation markers, independently of IL-7 levels. Collectively, these results provide further insight on the role of unsuppressed viral load in disrupting the IL-7/IL-7Rα system and contributing to HIV-1 disease progression.
KW - Activation markers
KW - HIV-1
KW - Interleukin-7
KW - Interleukin-7 receptor
KW - T cell subsets
UR - http://www.scopus.com/inward/record.url?scp=40449083885&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=40449083885&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2249.2008.03610.x
DO - 10.1111/j.1365-2249.2008.03610.x
M3 - Article
VL - 152
SP - 72
EP - 80
JO - Clinical and Experimental Immunology
JF - Clinical and Experimental Immunology
SN - 0009-9104
IS - 1
ER -