Acute phase response in exercise. II. Associations between vitamin E, cytokines, and muscle proteolysis

Joseph Gerard Cannon, S. N. Meydani, R. A. Fielding, M. A. Fiatarone, M. Meydani, M. Farhangmehr, S. F. Orencole, J. B. Blumberg, W. J. Evans

Research output: Contribution to journalArticle

256 Scopus citations

Abstract

Cytokines such as interleukin 1 (IL-1), tumor necrosis factor-α (TNF-α), and interleukin 6 (IL-6) mediate a variety of host responses to trauma and infection, including skeletal muscle proteolysis. This investigation assesses the influence of damaging eccentric exercise on in vitro production and plasma concentrations of cytokines and their relationship to muscle protein breakdown. In a double-blind placebo-controlled protocol, 21 male subjects took vitamin E supplements (800 IU/day) for 48 days, then ran downhill on an inclined treadmill. Twenty-four hours after this single session of eccentric exercise, endotoxin-induced secretion of IL-1β was augmented 154% (P < 0.01) in cells obtained from the placebo subjects, but no significant exercise-related changes were observed in cells from the vitamin E-supplemented subjects. TNF-α secretion was also significantly increased 24 h after exercise, but the response was not inhibited by vitamin E. In contrast, IL-6 secretion did not change after exercise, but dietary vitamin E supplementation significantly reduced IL-6 secretion throughout the 12-day period of observation (P = 0.023). Urinary 3-methylhistidine excretion correlated with mononuclear cell secretion of both IL-1β (P < 0.05) and prostaglandin E2 (P < 0.05), supporting the concept that these mononuclear cell products contribute to the regulation of muscle proteolysis.

Original languageEnglish (US)
Pages (from-to)R1235-R1240
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume260
Issue number6 29-6
DOIs
StatePublished - Jan 1 1991

Keywords

  • 3-Methylhistidine
  • Interleukin 1
  • Interleukin 6
  • Tumor necrosis factor-α

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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    Cannon, J. G., Meydani, S. N., Fielding, R. A., Fiatarone, M. A., Meydani, M., Farhangmehr, M., Orencole, S. F., Blumberg, J. B., & Evans, W. J. (1991). Acute phase response in exercise. II. Associations between vitamin E, cytokines, and muscle proteolysis. American Journal of Physiology - Regulatory Integrative and Comparative Physiology, 260(6 29-6), R1235-R1240. https://doi.org/10.1152/ajpregu.1991.260.6.r1235