Cited by 111Cytomegalovirus and herpesvirus researchT-cell and B-cell ImmunologyHIV Research and Treatment

Cytomegalovirus infection induces the accumulation of short-lived, multifunctional CD4+ CD45RA+ CD27− T cells: the potential involvement of interleukin-7 in this process: IL-7 induces re-expression of CD45RA in CD4+ T cells

Open access
Libri, Valentina, Azevedo, Rita I., Jackson, Sarah E., Di Mitri, Diletta, Lachmann, Raskit, Fuhrmann, Stephan, Vukmanovic-Stejic, Milica, Yong, Kwee +4 more·2011·Immunology

Abstract

The relative roles that ageing and lifelong cytomegalovirus (CMV) infection have in shaping naive and memory CD4+ T-cell repertoires in healthy older people is unclear. Using multiple linear regression analysis we found that age itself is a stronger predictor than CMV seropositivity for the decrease in CD45RA+ CD27+ CD4+ T cells over time. In contrast, the increase in CD45RA⁻ CD27⁻ and CD45RA+ CD27⁻ CD4+ T cells is almost exclusively the result of CMV seropositivity, with age alone having no significant effect. Furthermore, the majority of the CD45RA⁻ CD27⁻ and CD45RA+ CD27⁻ CD4+ T cells in CMV-seropositive donors are specific for this virus. CD45RA+ CD27⁻ CD4+ T cells have significantly reduced CD28, interleukin-7 receptor α (IL-7Rα) and Bcl-2 expression, Akt (ser473) phosphorylation and reduced ability to survive after T-cell receptor activation compared with the other T-cell subsets in the same donors. Despite this, the CD45RA+ CD27⁻ subset is as multifunctional as the CD45RA⁻ D27+ and CD45RA⁻ CD27⁻ CD4+ T-cell subsets, indicating that they are not an exhausted population. In addition, CD45RA+ CD27⁻ CD4+ T cells have cytotoxic potential as they express high levels of granzyme B and perforin. CD4+ memory T cells re-expressing CD45RA can be generated from the CD45RA⁻ CD27+ population by the addition of IL-7 and during this process these cells down-regulated expression of IL-7R and Bcl-2 and so resemble their counterparts in vivo. Finally we showed that the proportion of CD45RA+ CD27⁻ CD4+ T cells of multiple specificities was significantly higher in the bone marrow than the blood of the same individuals, suggesting that this may be a site where these cells are generated.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1111/j.1365-2567.2010.03386.x

Cites

52 of 52 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Unlike senescent fibroblasts, T cells with characteristics of senescence are prone to apoptosis in vitro.

    “Unlike senescent fibroblasts however, T cells that have characteristics of senescence are prone to apoptosis in vitro [23, 28] although they may be induced to persist by appropriate signals such as growth factors in vivo [32].”
  • Within primary human T cells, both CD4+ and CD8+ populations contain a subset of poorly proliferative cells with characteristics very similar to senescent fibroblasts.

    “Within primary human T cells, in both CD4 + [23, 28, 29] and CD8 + [25, 30] populations, there is a subset of poorly proliferative cells that exhibit characteristics that are very similar to senescent fibroblasts (Fig. 1).”
  • Senescent-like T cells can be identified by surface marker expression CD27-, CD28-, CD45RA+, KLRG1+, CD57+, which are characteristics of highly differentiated T cells.

    “These cells can be identified by surface marker expression (CD27 - ,CD28 - , CD45RA + , KLRG1 + , CD57 + ) that are all characteristics of highly differentiated T cells [23, 28, 30, 31].”
  • Compared to less differentiated populations, senescent T cells secrete high levels of inflammatory cytokines IFN-gamma and TNF-alpha after short term activation.

    “In comparison to less differentiated populations, senescent T cells also secrete high levels of inflammatory cytokines such IFN  and TNF  after short term activation [28, 30, 50]”
  • Undifferentiated T cells with relatively long telomeres are CD27+CD28+, while senescent T cells with the shortest telomeres are found within the CD27-CD28- population.

    “While undifferentiated T cells that have relatively long telomeres are CD27 + CD28 + , senescent T cells with the shortest telomeres are found within the CD27 - CD28 - population [22, 28, 34, 54].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. IL-7 induces re-expression of CD45RA in CD4 + T cells 13652567, 2011, 3, · DOI
  2. Pilling D, Akbar AN, Girdlestone J et al. Interferon-beta mediates stromal cell rescue of T cells from apoptosis. Eur J Immunol 1999; 29:1041-50.

Cited by

Sorted by citations

Authors
Libri, V., Azevedo, R. I., Jackson, S. E., Di Mitri, D., Lachmann, R., Fuhrmann, S., Vukmanovic-Stejic, M., Yong, K., Battistini, L., Kern, F., Soares, M. V. D., & Akbar, A. N.
Affiliations
  • University College London (GB)
  • Instituto de Medicina Molecular João Lobo Antunes (PT)
  • Brighton and Sussex Medical School (GB)
  • Fondazione Santa Lucia (IT)
Corresponding author
Akbar, Arne N.
Venue
Immunology
Publisher
Wiley
Published
2011-01-07
Volume
132
Issue
3
Pages
326-339
ISSN
0019-2805 (ISSN-L)
OpenAlex
W1942062259
Cited by
111
References
52
Citations by year
2026: 4 · 2025: 3 · 2024: 11 · 2023: 7 · 2022: 4 · 2021: 7 · 2020: 4 · 2019: 5 · 2018: 6 · 2017: 10 · 2016: 9 · 2015: 7 · 2014: 7 · 2013: 10 · 2012: 9
FWCI
8.19
Type
journal article
Language
en
Open access
Locations
  • Immunology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Directorate for Biological Sciences
  • Biotechnology and Biological Sciences Research Council (BB/E019188/1)
  • Fundação para a Ciência e a Tecnologia (POCI2010)
Topics
  • Health Sciences › Medicine › Epidemiology › Cytomegalovirus and herpesvirus research
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
Keywords
cytomegalovirus infection, CD4+ T cells, IL-7, CD127, T cell exhaustion, memory T cells, CD28, Bcl-2, Akt phosphorylation, granzyme B, perforin, bone marrow, T cell receptor specificity
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Cell Differentiation, Cell Separation, Cell Survival, Cytomegalovirus Infections, Flow Cytometry, Humans, Middle Aged, Signal Transduction, CD4-Positive T-Lymphocytes, Interleukin-7, T-Lymphocyte Subsets, Leukocyte Common Antigens, Tumor Necrosis Factor Receptor Superfamily, Member 7, Young Adult

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review