Cited by 145Exercise and Physiological ResponsesCardiovascular and exercise physiologyPhysical Activity and Health

β2-Adrenergic receptor signaling mediates the preferential mobilization of differentiated subsets of CD8+ T-cells, NK-cells and non-classical monocytes in response to acute exercise in humans

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Graff, Rachel M., Kunz, Hawley E., Agha, Nadia H., Baker, Forrest L., Laughlin, Mitzi, Bigley, Austin B., Markofski, Melissa M., LaVoy, Emily C. +4 more·2018·Brain, Behavior, and Immunity

Abstract

Acute exercise preferentially mobilizes cytotoxic T-cells, NK-cells and non-classical monocytes to the bloodstream under the influence of hemodynamic forces and/or β 2-adrenergic receptor (β 2-AR) signaling. However, the relative contribution of these mechanisms to the redeployment of the most exercise-responsive cell types is largely unknown. We determined the lymphocyte and monocyte subtypes mobilized to blood during exercise via β 2-AR signaling whilst controlling for β 1-AR mediated reductions in hemodynamic forces. In a randomized, double blind, complete cross-over design, 14 healthy cyclists exercised for 30-minutes at +10% of blood lactate threshold after ingesting: (1) a placebo, (2) a β 1-preferential antagonist (10 mg bisoprolol), or (2) a non-preferential β 1 + β 2-antagonist (80 mg nadolol) across three trials separated by >7-days. Bisoprolol was administered to reduce hemodynamic forces (heart rate and blood pressure) during exercise to levels comparable with nadolol but without blocking β 2-ARs. The mobilization of total NK-cells, terminally differentiated (CD57+) NK-cells, central memory, effector memory and CD45RA+ effector memory CD8+ T-cells; non-classical monocytes; and γδ T-cells were significantly blunted or abrogated under nadolol compared to both bisoprolol and placebo, indicating that the exercise-induced mobilization of these cell types to the blood is largely influenced by β 2-AR signaling. Nadolol failed to inhibit the mobilization of classical monocytes, CD4+ T-cells (and their subsets) or naïve CD8+ T-cells, indicating that these cell types are mobilized with exercise independently of the β 2-AR. We conclude that the preferential mobilization of NK-cells, non-classical monocytes and differentiated subsets of CD8+ T-cells with exercise is largely dependent on catecholamine signaling through the β 2-AR. These findings provide mechanistic insights by which distinct lymphocyte and monocyte subtypes are preferentially mobilized to protect the host from anticipated injury or infection in response to an acute stress response.

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Authors
Graff, R. M., Kunz, H. E., Agha, N. H., Baker, F. L., Laughlin, M., Bigley, A. B., Markofski, M. M., LaVoy, E. C., Katsanis, E., Bond, R. A., Bollard, C. M., & Simpson, R. J.
Affiliations
  • University of Houston (US)
  • University of Arizona (US)
  • Children's National (US)
  • The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Simpson, Richard J.
Venue
Brain, Behavior, and Immunity
Publisher
Elsevier BV
Published
2018-11
Volume
74
Pages
143-153
ISSN
0889-1591 (ISSN-L)
OpenAlex
W2889061983
Cited by
145
References
68
Citations by year
2026: 21 · 2025: 20 · 2024: 21 · 2023: 19 · 2022: 15 · 2021: 26 · 2020: 15 · 2019: 7 · 2018: 1
FWCI
10.47
Type
journal article
Language
en
Open access
Locations
  • Brain Behavior and Immunity (acceptedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
NASA (NNX12AB48G, NNX16AB29G, NNX16AG02G)
Topics
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
Keywords
β2-adrenergic receptor signaling, acute exercise, lymphocyte mobilization, natural killer cells, non-classical monocytes, CD8+ T cells, γδ T cells, bisoprolol, nadolol, catecholamines, exercise immunology, stress response, lactate threshold
MeSH terms
Adult, Catecholamines, Double-Blind Method, Female, Humans, Killer Cells, Natural, Lymphocyte Activation, Male, Monocytes, Nadolol, Signal Transduction, Exercise, Bisoprolol, Receptors, Adrenergic, beta-2, CD8-Positive T-Lymphocytes, Cross-Over Studies, Healthy Volunteers

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