title: Endurance run increases circulating IL-6 and IL-1ra but downregulates ex vivo TNF-alpha and IL-1 beta production.
abstract: We investigated whether a 6-h endurance run changes cytokine plasma concentrations and lipopolysaccharides (LPS) stimulated ex vivo production of cytokines in a whole blood culture of 19 well-trained athletes. The average distance covered was 65.1 +/- 8.64 (SD) km. At the end of the exercise, the mean plasma concentration of interleukin-1-receptor agonist (IL-1ra), which was 188 pg/ml 24 h before finish, increased to 886 pg/ml (P < 0.0005). The mean plasma interleukin-6 concentration increased from 18.5 +/- 4.2 to 71.5 +/- 33.3 pg/ml (P < 0.0001). The increase of neutrophils correlated with the increase of IL-1ra concentrations (r = 0.58, P < 0.005). We could not detect an effect of exercise on plasma concentrations of interleukin-1 beta (IL-1 beta) or tumor necrosis factor-alpha (TNF-alpha). The ex vivo LPS-stimulated production of IL-1 beta in athletes 24 h before the run was significantly higher than in sedentary controls. Exercise induced a decrease of LPS-stimulated production of IL-1 beta and TNF-alpha, whereas production of IL-1ra was unchanged. These results show that prolonged exercise elicits a selective downregulation of the proinflammatory cytokine production and upregulation of the cytokines IL-1ra and interleukin-6.
authors.affiliation: Department of Medicine, University Hospital St. Radboud, Nijmegen, The Netherlands.
authors.forename: J P
authors.initials: JP
authors.lastname: Drenth
authors.forename: S H
authors.initials: SH
authors.lastname: Van Uum
authors.forename: M
authors.initials: M
authors.lastname: Van Deuren
authors.forename: G J
authors.initials: GJ
authors.lastname: Pesman
authors.forename: J
authors.initials: J
authors.lastname: Van der Ven-Jongekrijg
authors.forename: J W
authors.initials: JW
authors.lastname: Van der Meer
mesh_terms: D000328:Adult; D015536:Down-Regulation; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1 / Q000096:biosynthesis*; D015850:Interleukin-6 / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010807:Physical Endurance / Q000502:physiology; D011863:Radioimmunoassay; D012420:Running / Q000502:physiology*; D012795:Sialoglycoproteins / Q000097:blood*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis*
chemical_list: C507763:IL1RN protein, human; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1; D015850:Interleukin-6; D012795:Sialoglycoproteins; D014409:Tumor Necrosis Factor-alpha