The effects of bovine colostrum supplementation on in vivo immunity following prolonged exercise: a randomised controlled trial

Jones, Arwel and March, Daniel and Thatcher, Rhys and Diment, Bethany and Walsh, Neil and Davison, Glen (2018) The effects of bovine colostrum supplementation on in vivo immunity following prolonged exercise: a randomised controlled trial. European Journal of Nutrition . ISSN 1436-6207

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Abstract

Background

Bovine colostrum (COL) has been advocated as a nutritional countermeasure to exercise-induced immune dysfunction, but there is a lack of research with clinically relevant in vivo measures.

Aim

To investigate the effects of COL supplementation on in vivo immunity following prolonged exercise using experimental contact hypersensitivity (CHS) with the novel antigen diphenylcyclopropenone (DPCP).

Methods

In a double-blind design, 31 men were randomly assigned to COL (20 g/day) or placebo (PLA) for 58 days. Participants ran for 2 h at 60% maximal aerobic capacity on day 28 and received a primary DPCP exposure (sensitisation) 20 min after. On day 56, participants received a low-dose-series DPCP challenge to elicit recall of in vivo immune-specific memory (quantified by skinfold thickness 24 and 48 h later). Analysis of the dose–response curves allowed determination of the minimum dose required to elicit a positive response (i.e., sensitivity).

Results

There was no difference in summed skinfold thickness responses between COL and PLA at 24 h (p = 0.124) and 48 h (p = 0.405). However, sensitivity of in vivo immune responsiveness was greater with COL at 24 h (p < 0.001) and 48 h (p = 0.023) with doses ~ twofold greater required to elicit a positive response in PLA.

Conclusions

COL blunts the prolonged exercise-induced decrease in clinically relevant in vivo immune responsiveness to a novel antigen, which may be a mechanism for reduced illness reports observed in the previous studies. These findings also suggest that CHS sensitivity is highly relevant to host defence.

Keywords:Running, Host defence, Contact hypersensitivity, Diphenylcyclopropenone, Whole integrated immune response
Subjects:C Biological Sciences > C600 Sports Science
B Subjects allied to Medicine > B120 Physiology
C Biological Sciences > C550 Immunology
B Subjects allied to Medicine > B400 Nutrition
Divisions:College of Social Science > Lincoln Institute of Health
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ID Code:30287
Deposited On:30 Jan 2018 19:47

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