Latent CMV impairs NK-cells after acute exercise

rain Behav Immun. 2012 Jan;26(1):177-86. Epub 2011 Sep 10.

NK-cells have an impaired response to acute exercise and a lower expression of the inhibitory receptors KLRG1 and CD158a in humans with latent cytomegalovirus infection.

Bigley AB, Lowder TW, Spielmann G, Rector JL, Pircher H, Woods JA, Simpson RJ.

Source

Laboratory of Integrated Physiology, Department of Health and Human Performance, University of Houston, 3855 Holman Street, Houston, TX 77204, USA.

Abstract

NK-cells and γδ T-cells are cytotoxic effectors of the immune system that are preferentially mobilized into the blood compartment in response to acute stress and exercise.
...
EBVpos had higher proportions of CD8+ NK-cells, but cellular responses to exercise were not influenced by EBV. The frequency and exercise-responsiveness of γδ T-cells was not affected by CMV or EBV serostatus (p>0.05). In conclusion, latent CMV infection is associated with lowered numbers of NK-cells expressing inhibitory receptors and a blunted mobilization of NK-cells in response to acute exercise. This may indicate a compromised immune response to "fight-or-flight" situations in those infected with CMV.
Copyright © 2011 Elsevier Inc. All rights reserved.

http://www.ncbi.nlm.nih.gov/

pubmed/21933704