Iron status and the acute post-exercise hepcidin response in athletes.

Autor: Peter Peeling; Marc Sim; Claire E Badenhorst; Brian Dawson; Andrew D Govus; Chris R Abbiss; Dorine W Swinkels; Debbie Trinder
Sprache: Englisch
Veröffentlicht: 2014
Quelle: Directory of Open Access Journals: DOAJ Articles
Online Zugang: https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24667393/?tool=EBI
https://doaj.org/toc/1932-6203
1932-6203
doi:10.1371/journal.pone.0093002
https://doaj.org/article/111803da2dd843328ab863bd6cbb514d
https://doi.org/10.1371/journal.pone.0093002
https://doaj.org/article/111803da2dd843328ab863bd6cbb514d
Erfassungsnummer: ftdoajarticles:oai:doaj.org/article:111803da2dd843328ab863bd6cbb514d

Zusammenfassung

This study explored the relationship between serum ferritin and hepcidin in athletes. Baseline serum ferritin levels of 54 athletes from the control trial of five investigations conducted in our laboratory were considered; athletes were grouped according to values <30 μg/L (SF<30), 30-50 μg/L (SF30-50), 50-100 μg/L (SF50-100), or >100 μg/L (SF>100). Data pooling resulted in each athlete completing one of five running sessions: (1) 8 × 3 min at 85% vVO2peak; (2) 5 × 4 min at 90% vVO2peak; (3) 90 min continuous at 75% vVO2peak; (4) 40 min continuous at 75% vVO2peak; (5) 40 min continuous at 65% vVO2peak. Athletes from each running session were represented amongst all four groups; hence, the mean exercise duration and intensity were not different (p>0.05). Venous blood samples were collected pre-, post- and 3 h post-exercise, and were analysed for serum ferritin, iron, interleukin-6 (IL-6) and hepcidin-25. Baseline and post-exercise serum ferritin levels were different between groups (p<0.05). There were no group differences for pre- or post-exercise serum iron or IL-6 (p>0.05). Post-exercise IL-6 was significantly elevated compared to baseline within each group (p<0.05). Pre- and 3 h post-exercise hepcidin-25 was sequentially greater as the groups baseline serum ferritin levels increased (p<0.05). However, post-exercise hepcidin levels were only significantly elevated in three groups (SF30-50, SF50-100, and SF>100; p<0.05). An athlete's iron stores may dictate the baseline hepcidin levels and the magnitude of post-exercise hepcidin response. Low iron stores suppressed post-exercise hepcidin, seemingly overriding any inflammatory-driven increases.