Effects of acute exercise on salivary free insulin-like growth factor 1  and interleukin 10 in sportsmen.

Taye J. Lasisi , Ade F. Adeniyi
1. Departments of Physiology and Oral Pathology, College of Medicine, University of Ibadan, Nigeria.
2. Department of Physiotherapy, University of Ibadan /University College Hospital, Ibadan.

Abstract
Background:Saliva analysis is rapidly developing as a tool for the assessment of biomarkers of sports training. It remains  poorly understood whether a short bout of sport training can alter some salivary immune biomarkers.

Aim:To investigate the effect of acute exercise using football training session on salivary flow rate, salivary free Insulin-like  Growth Factor-1 (IGF-1) and Interleukin 10 (IL-10).

Methods:Saliva samples were collected before and immediately after a football session. Salivary flow rates, salivary levels of free  IGF-1 and IL-10 (using ELISA) were determined. Data was analyzed and compared using Related Samples Wilcoxon Signed  Rank test (non-parametric test). Relationships between salivary flow rate and levels of free IGF-1 and IL-10 were determined  using Spearman correlation test.

Results:There were 22 male footballers with a mean age of 20.46 years. Salivary flow rate reduced significantly (p = 0.01) after  the training session while salivary levels of free IGF-1 and IL-10 did not show any significant change. Also, there were no correlations between salivary flow rates and salivary levels of free IGF-1 and IL-10 before and after exercise.

Conclusion: These findings suggest that acute exercise caused significant reduction in salivary flow rate but no change in the
levels of salivary free IGF-1 and IL-10.

Keywords: Saliva, exercise, Insulin-like Growth Factor, interleukin 10,salivary flow rate