ISSN:
1439-6327
Keywords:
Physical training
;
Acute exercise
;
Lymphocyte
;
T-cell growth factor
;
Thymus
;
Stress
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The aim of this study was a detailed examination of the effects of moderate exercise on T-cells in adult male Wistar rats. The T-cell populations were compared in sedentary rats (C, n = 5) and in rats trained for 4 weeks on a treadmill (30–60 min·day−1, 6 days·week−1, 20–30 m·min−1) and sacrificed at rest (Trest, n=5). In the T-rest rats, there were higher percentages of CD4+CD8−, CD4− CD8 + and CD4 − CD8 −thymocytes (P〈0.05, P〈0.05 and P〈0.01 respectively) and of CD4−CD8 + splenocytes (P〈 0.01), and a lower percentage of CD4−CD8+ cells in the lymph nodes (P〈0.01). Compared with T-rest or C rats, trained rats (n = 5) or untrained rats (n = 5) sacrificed immediately after a running session (60 min, 30 m·min−1) had a higher percentage of mononucleated cells CD4 + CD8 -in the blood (P〈0.05 and P〈0.01). Lastly, compared with C rats, rats (n=5) sacrificed immediately after their 5th day of training (30–60 min·day−1) presented a higher total splenocyte population (P〈0.05) and greater in vitro production of T-cell growth factor (interleukin 2 + interleucin 4) by splenocytes in response to a mitogen (P〈0.01). These results would indicate that moderate endurance training modifies the cellular composition of lymphoid organs, without impairing the in vitro functions of T-cells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00243515
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