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J Appl Physiol 71: 815-820, 1991;
8750-7587/91 $5.00
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Journal of Applied Physiology, Vol 71, Issue 3 815-820, Copyright © 1991 by American Physiological Society

ARTICLES

Immunomodulations of thymocytes and splenocytes in trained rats

A. Ferry, P. Rieu, F. Laziri, C. Y. Guezennec, A. elHabazi, C. Le Page and M. Rieu
Laboratoire de Physiologie des Adaptations, Centre Hospitalier Universitaire Cochin Port-Royal, Universite Rene Descartes Paris V, France.

The aim of this study was to describe the effects of training (running) on thymus and spleen cells in the rat. Young Wistar control rats (n = 6), rats trained for 4 wk (n = 5), and rats trained for 4 wk followed by 1 wk of intensive training (3 h/day, n = 6) were studied. Various lymphocyte surface and nuclear markers were determined by immunocytochemistry. The results show that 4 wk of training 1) decreased the percentage of bromodeoxyuridine (BrdU+) thymocytes (cell in phase S of the cycle, immature thymocytes; P less than 0.05) and the viability of thymocytes stimulated with concanavalin A (Con A; P less than 0.05) and 2) increased the absolute number of CD8+ (suppressor/cytotoxic T cells; 29%) and the percentage of CD8+ splenocytes (P less than 0.01). An additional week of intensive training in the 4-wk trained rats induced 1) a decrease in the absolute number of thymocytes (25%, P less than 0.05), TCR+ thymocytes, splenocytes (28%, P less than 0.01), T, CD4+ (helper T cells; 34%), and CD8+ (31%) splenocytes (P less than 0.01) and 2) an increase in the viability of splenocytes after stimulation with Con A for 72 h (P less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)


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J Appl Physiol, June 1, 1999; 86(6): 1823 - 1827.
[Abstract] [Full Text] [PDF]


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