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Reduction in resting plasma granulysin as a marker of increased training load

Citation

Shing, CM and Ogawa, K and Zhang, X and Nagatomi, R and Peake, JM and Suzuki, K and Jenkins, DG and Coombes, JS, Reduction in resting plasma granulysin as a marker of increased training load, Exercise Immunology Review, 13, (1) pp. 89-99. ISSN 1077-5552 (2007) [Refereed Article]

Abstract

Granulysin is a cytolytic granule protein released by natural killer cells and activated cytotoxic T lymphocytes. The influence of exercise training on circulating granulysin concentration is unknown, as is the relationship between granulysin concentration, natural killer cell number and natural killer cell cytotoxicity. We examined changes in plasma granulysin concentration, natural killer cell number and cytotoxicity following acute exercise and different training loads. Fifteen highly trained male cyclists completed a baseline 40-km cycle time trial (TT 401) followed by five weeks of normal training and a repeat time trial (TT 402). The cyclists then completed four days of high intensity training followed by another time trial (TT 403) on day five. Following one final week of normal training cyclists completed another time trial (TT 404). Fasting venous blood was collected before and after each time trial to determine granulysin concentration, natural killer cell number and natural killer cell cytotoxicity. Granulysin concentration increased significantly after each time trial (P<0.001). Pre-exercise granulysin concentration for TT 403 was significantly lower than pre-exercise concentration for TT 401 (-20.3 ± 7.5%, P<0.026), TT 402 (-16.7 ± 4.3%, P<0.003) and TT 404 (-21 ± 4.2%, P<0.001). Circulating natural killer cell numbers also increased significantly post-exercise for each time trial (P<0.001), however there was no significant difference across TT 40 (P>0.05). Exercise did not significantly alter natural killer cell cytotoxicity on a per cell basis, and there were no significant differences between the four time trials. In conclusion, plasma granulysin concentration increases following moderate duration, strenuous exercise and is decreased in response to a short-term period of intensified training.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Immunology
Research Field:Immunology not elsewhere classified
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Immune System and Allergy
Author:Shing, CM (Dr Cecilia Kitic)
ID Code:49874
Year Published:2007
Web of Science® Times Cited:4
Deposited By:Health Sciences A
Deposited On:2008-01-29
Last Modified:2012-03-05
Downloads:0

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