Acute phase response in exercise: interaction of age and vitamin E on neutrophils and muscle enzyme release.

Published

Journal Article

Several host defense responses and metabolic reactions that occur during infection have been observed after exercise. We hypothesized that these reactions, known as the "acute phase response," contribute to the breakdown and clearance of damaged tissue after exercise. This hypothesis was tested with 21 male volunteers representing two ranges of age (22-29 and 55-74 yr), who ran downhill on an inclined treadmill to accentuate damaging eccentric muscular contractions. The subject groups were further divided in a double-blind placebo-controlled protocol, which examined the influence of 48 days of dietary vitamin E supplementation before the exercise. All subjects were monitored for 12 days after exercise for changes in circulating leukocytes, superoxide release from neutrophils, lipid peroxidation, and efflux of the intramuscular enzyme creatine kinase (CK) into the circulation. Among those receiving placebo, the less than 30-yr-old subjects responded to exercise with a significantly greater neutrophilia and higher plasma CK concentrations than the greater than 55-yr-old subjects. Dietary supplementation with vitamin E tended to eliminate the differences between the two age groups, primarily by increasing the responses of the greater than 55-yr-old subjects. At the time of peak concentrations in the plasma, CK correlated significantly with superoxide release from neutrophils. The association of enzyme efflux with neutrophil mobilization and function supports the concept that neutrophils are involved in the delayed increase in muscle membrane permeability after damaging exercise.

Full Text

Duke Authors

Cited Authors

  • Cannon, JG; Orencole, SF; Fielding, RA; Meydani, M; Meydani, SN; Fiatarone, MA; Blumberg, JB; Evans, WJ

Published Date

  • December 1990

Published In

Volume / Issue

  • 259 / 6 Pt 2

Start / End Page

  • R1214 - R1219

PubMed ID

  • 2175569

Pubmed Central ID

  • 2175569

International Standard Serial Number (ISSN)

  • 0002-9513

Digital Object Identifier (DOI)

  • 10.1152/ajpregu.1990.259.6.R1214

Language

  • eng

Conference Location

  • United States