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SALIVARY ANTIMICROBIAL PROTEIN RESPONSE TO PROLONGED RUNNING

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Author(s): Trevor L Gillum | Matthew Kuennen | Cheryl Gourley | Karol Dokladny | Suzanne Schneider

Journal: Biology of Sport
ISSN 0860-021X

Volume: 30;
Issue: 1;
Start page: 3;
Date: 2013;
Original page

Keywords: lactoferrin | Lysozyme | upper respiratory tract infections (URIs) | salivary IgA | mucosal immunity

ABSTRACT
Prolonged exercise may compromise immunity through a reduction of salivary antimicrobial proteins (AMPs). Salivary IgA (IgA) has been extensively studied, but little is known about the effect of acute, prolonged exercise on AMPs including lysozyme (Lys) and lactoferrin (Lac). Objective: To determine the effect of a 50-km trail race on salivary cortisol (Cort), IgA, Lys, and Lac. Methods: 14 subjects: (6 females, 8 males) completed a 50km ultramarathon. Saliva was collected pre, immediately after (post) and 1.5 hrs post race ( 1.5). Results: Lac concentration was higher at 1.5 hrs post race compared to post exercise (p0.05). IgA concentration, secretion rate, and IgA/Osm were lower 1.5 hrs post compared to pre race (p
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