Influence of 4 weeks of bovine colostrum supplementation on neutrophil and mucosal immune responses to prolonged cycling

Jones, A. W. and Thatcher, R. and March, D. S. and Davison, G. (2015) Influence of 4 weeks of bovine colostrum supplementation on neutrophil and mucosal immune responses to prolonged cycling. Scandinavian Journal of Medicine and Science in Sports, 25 (6). pp. 788-796. ISSN 0905-7188

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Abstract

Bovine colostrum (COL) has been advocated as a nutritional countermeasure to exercise-induced immune dysfunction. The aims of this study were to identify the effects of 4 weeks of COL supplementation on neutrophil responses and mucosal immunity following prolonged exercise. In a randomized double-blind, parallel group design, participants [age 28 ± 8 years; body mass 79 ± 7 kg; height 182 ± 6 cm; maximal oxygen uptake ( V ˙ O 2 m a x ) 55 ± 9 mL/kg/min] were assigned to 20 g per day of COL (n = 10) or an isoenergetic/isomacronutrient placebo (PLA; n = 10) for 4 weeks. Venous blood and unstimulated saliva samples were obtained before and after 2.5 h of cycling at 15% Δ (∼55-60% V ˙ O 2 m a x ). A significantly greater formyl-methionyl-leucyl phenylalanine-stimulated oxidative burst was observed in the COL group compared with PLA group (P < 0.05) and a trend toward a time × group interaction (P = 0.06). However, there was no effect of COL on leukocyte trafficking, phorbol-12-myristate-13-acetate-stimulated oxidative burst, bacterial-stimulated neutrophil degranulation, salivary secretory IgA, lactoferrin or lysozyme (P > 0.05). These findings provide further evidence of the beneficial effects of COL on receptor-mediated stimulation of neutrophil oxidative burst in a model of exercise-induced immune dysfunction.

Keywords:Immune function, antimicrobial peptides, exercise, innate immune system, leukocyte, bmjconvert, NotOAChecked
Subjects:C Biological Sciences > C550 Immunology
C Biological Sciences > C600 Sports Science
B Subjects allied to Medicine > B400 Nutrition
Divisions:College of Science
College of Social Science > Lincoln Institute of Health
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ID Code:19016
Deposited On:15 Oct 2015 15:24

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