| Full text | |
| Author(s): |
Moreira, A.
[1]
;
Bacurau, R. F. P.
[2]
;
Napimoga, M. H.
[3, 4]
;
Arruda, A. F. S.
[1]
;
Freitas, C. G.
[1]
;
Drago, G.
[5]
;
Aoki, M. S.
[2]
Total Authors: 7
|
| Affiliation: | [1] Univ Sao Paulo, Sch Phys Educ & Sport, BR-05508030 Sao Paulo - Brazil
[2] Univ Sao Paulo, Sch Arts Sci & Humanities, BR-05508030 Sao Paulo - Brazil
[3] Sao Leopoldo Mand Inst, Campinas, SP - Brazil
[4] Res Ctr, Campinas, SP - Brazil
[5] Pinheiros Sport Club, Sao Paulo - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | BIOLOGY OF SPORT; v. 30, n. 4, p. 243-247, 2013. |
| Web of Science Citations: | 12 |
| Abstract | |
Athletes engaged in strenuous training might experience transient immune suppression that could lead to greater incidence of upper respiratory tract infections (URTI). Since interleukin 21 (IL-21) stimulates immunoglobulin A (IgA) secreting cells and a low level of this immunoglobulin is associated with increased incidence of URTI, the aim of the present study was to investigate the effect of a basketball match on salivary cortisol (sC), salivary IL-21 (sIL-21) and salivary IgA (sIgA) levels. Twenty male basketball players participated in an official game in two teams (10 players in each team). The saliva samples were collected before the warm-up and approximately 10-15 min after the end of the match and were analysed by ELISA methods. sC concentration increased significantly after the match while sIL-21 level was reduced (p < 0.05). In opposition to the study's hypothesis, sIgA level did not change in response to the match. The present findings suggest that a basketball match is sufficiently stressful to elevate sC concentration and attenuates the sIL-21 output without compromising the sIgA level. It is reasonable to speculate that the stability of sIgA acute responses to the match, despite the decrement in sIL-21, indicates that other mechanisms rather than IL-21 stimulating B cell proliferation/differentiation might modulate IgA concentration and secretion rate. (AU) | |
| FAPESP's process: | 08/10404-3 - Salivary immunoglobulin A and salivary cortisol responses to training and competition in athletes from team sports and combat sports |
| Grantee: | Alexandre Moreira |
| Support Opportunities: | Regular Research Grants |