Article (Scientific journals)
T cell immunosenescence after early life adversity: association with cytomegalovirus infection.
Elwenspoek, M.M.C.; Sias, K.; Hengesch, X. et al.
2017In Frontiers in Immunology, 8, p. 1263
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Keywords :
early life adversity; immunosenescence; CD57; cytomegalovirus; telomere length; T cells
Abstract :
[en] Early life adversity (ELA) increases the risk for multiple age-related diseases, such as diabetes type 2 and cardiovascular disease. As prevalence is high, ELA poses a major and global public health problem. Immunosenescence, or aging of the immune system, has been proposed to underlie the association between ELA and long-term health consequences. However, it is unclear what drives ELA-associated immunosenescence and which cells are primarily affected. We investigated different biomarkers of immunosenescence in a healthy subset of the EpiPath cohort. Participants were either parent-reared (Ctrl, n = 59) or had experienced separation from their parents in early childhood and were subsequently adopted (ELA, n = 18). No difference was observed in telomere length or in methylation levels of age-related CpGs in whole blood, containing a heterogeneous mixture of immune cells. However, when specifically investigating T cells, we found a higher expression of senescence markers (CD57) in ELA. In addition, senescent T cells (CD57+) in ELA had an increased cytolytic potential compared to senescent cells in controls. With a mediation analysis we demonstrated that cytomegalovirus (CMV) infection, which is an important driving force of immunosenescence, largely accounted for elevated CD57 expression observed in ELA. Leukocyte telomere length may obscure cell-specific immunosenescence; here, we demonstrated that the use of cell surface markers of senescence can be more informative. Our data suggest that ELA may increase the risk of CMV infection in early childhood, thereby mediating the effect of ELA on T cell-specific immunosenescence. Thus, future studies should include CMV as a confounder or selectively investigate CMV seronegative cohorts.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Elwenspoek, M.M.C.
Sias, K.
Hengesch, X.
Schaan, Violetta ;  University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE)
Leenen, F.A.D.
Adams, P.
Meriaux, S.B.
Schmitz, S.
Bonnemberger, F.
Ewen, A.
Schächinger, H.
Vögele, Claus ;  University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE)
Muller, C.P.
Turner, J.D.
More authors (4 more) Less
External co-authors :
no
Language :
English
Title :
T cell immunosenescence after early life adversity: association with cytomegalovirus infection.
Publication date :
17 October 2017
Journal title :
Frontiers in Immunology
ISSN :
1664-3224
Publisher :
Union for Immunological Societies (IUIS), Lausanne -Frontiers Research Foundation, Switzerland
Volume :
8
Pages :
1263
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 23 October 2017

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