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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

SALIVARY IL-21 AND IGA RESPONSES TO A COMPETITIVE MATCH IN ELITE BASKETBALL PLAYERS

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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 type: Regular Research Grants