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-glucan on innate immune function and susceptibility to respiratory infection
1 Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
2 Department of Pathology and Microbiology, School of Medicine, University of South Carolina, Columbia, SC, USA
* To whom correspondence should be addressed. E-mail: jmdavis{at}sc.edu.
Both moderate exercise and the soluble oat fiber
-glucan can increase immune function and decrease risk of infection, but no information exists on their possible combined effects. This study tested the effects of moderate exercise and oat
-glucan on respiratory infection, macrophage anti-viral resistance and NK cytotoxicity. Mice were assigned to four groups: Ex-H2O, Ex-O
G, Con-H2O, or Con-O
G. Oat
-glucan was fed in the drinking water for 10 days prior to intranasal inoculation of HSV-1 or sacrifice. Exercise consisted of treadmill running (1h/day) for 6 days. Macrophage resistance to HSV-1 was increased with both Ex and O
G, whereas NK cytotoxicity was only increased with Ex. Ex was also associated with a 45% and 38% decrease in morbidity and mortality, respectively. Mortality was also decreased with O
G but this effect did not reach statistical significance. No additive effects of Ex and O
G were found. These data confirm a positive effect of both moderate exercise and oat
-glucan on immune function, but only moderate exercise was associated with a significant reduction in the risk of URTI in this model.
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