Cited by 101Exercise and Physiological ResponsesT-cell and B-cell ImmunologyTelomeres, Telomerase, and Senescence

High-intensity exercise elicits the mobilization of senescent T lymphocytes into the peripheral blood compartment in human subjects

Simpson, Richard J., Florida-James, Geraint D., Cosgrove, Cormac, Whyte, Greg P., Macrae, Scott, Pircher, Hanspeter, Guy, Keith·2007·Journal of Applied Physiology

Abstract

Clonal expansion of T lymphocytes in response to antigenic stimulation is a fundamental process of adaptive immunity. As a consequence of clonal expansion, some T lymphocytes acquire a senescent phenotype, fail to replicate in response to further antigenic stimulation, and express the killer cell lectin-like receptor G1 (KLRG1) and/or CD57. Physical exercise elicits a mobilization of large numbers of T lymphocytes into the bloodstream from peripheral lymphoid compartments, but the frequency of senescent cells in the mobilized population is not known. Eight male runners (age: 29 ± 9 yr; maximal O 2 uptake 62 ± 6 ml·kg −1 ·min −1 ) performed an intensive treadmill-running protocol at 80% maximal O 2 uptake to volitional exhaustion. Blood lymphocytes isolated before, immediately after, and 1 h after exercise were assessed for cell surface expression of KLRG1, CD57, CD28, CD45RA, CD45RO, CD62L, and lymphocyte subset markers (CD3, CD4, CD8, CD56) by flow cytometry. The percentage of all CD3 + T lymphocytes expressing KLRG1 and CD57 increased with exercise ( P < 0.01). The change in T-lymphocyte KLRG1 expression was attributed to both CD4 + and CD8 bright T cells, with the relative change being greater for the CD8 bright population ( P < 0.01). Mobilized T-lymphocyte populations expressing KLRG1 and CD57 appeared to extravasate the peripheral blood compartment after 1 h of recovery. In conclusion, T lymphocytes with a senescent phenotype are mobilized and subsequently removed from the bloodstream in response to acute high-intensity exercise. This suggests that T lymphocytes contained within the peripheral lymphoid compartments that are mobilized by exercise are likely to be at a more advanced stage of biological aging and have a reduced capacity for clonal expansion than blood-resident T cells.

Integrity signals

Registry

Crossref · 10.1152/japplphysiol.00007.2007

Cites

31 of 31 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Simpson, R. J., Florida-James, G. D., Cosgrove, C., Whyte, G. P., Macrae, S., Pircher, H., & Guy, K.
Affiliations
  • Edinburgh Napier University (GB)
  • Liverpool John Moores University (GB)
  • University of Freiburg (DE)
Venue
Journal of Applied Physiology
Published
2007-07
Volume
103
Issue
1
Pages
396-401
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2048687381
Cited by
101
References
30
Citations by year
2026: 3 · 2025: 3 · 2024: 4 · 2023: 2 · 2022: 2 · 2021: 4 · 2020: 2 · 2019: 2 · 2018: 11 · 2017: 6 · 2016: 4 · 2015: 7 · 2014: 10 · 2013: 7 · 2012: 7
FWCI
7.93
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Edinburgh Napier Research Repository (Edinburgh Napier University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
Keywords
high-intensity exercise, KLRG1, CD57, T cell mobilization, clonal expansion, CD4+ T cells, lymphocyte migration, endurance runners, treadmill running, lymphocyte subsets
MeSH terms
Adult, Cell Movement, Flow Cytometry, Humans, Lymphocyte Activation, Male, Oxygen Consumption, Receptors, Immunologic, Time Factors, Cohort Studies, Exercise, CD4-Positive T-Lymphocytes, Trans-Activators, Immunophenotyping, Cellular Senescence, CD3 Complex, Leukocyte Common Antigens, CD28 Antigens, CD8-Positive T-Lymphocytes, Muscle Fatigue, CD57 Antigens, L-Selectin, Lectins, C-Type

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