Abstract：
:The high iron demand associated with enhanced erythropoiesis during high-altitude hypoxia leads to skeletal muscle iron mobilization and decrease in myoglobin protein levels. To investigate the effect of enhanced erythropoiesis on systemic and muscle iron metabolism under nonhypoxic conditions, 8 healthy volunteers were treated with recombinant erythropoietin (rhEpo) for 1 month. As expected, the treatment efficiently increased erythropoiesis and stimulated bone marrow iron use. It was also associated with a prompt and considerable decrease in urinary hepcidin and a slight transient increase in GDF-15. The increased iron use and reduced hepcidin levels suggested increased iron mobilization, but the treatment was associated with increased muscle iron and L ferritin levels. The muscle expression of transferrin receptor and ferroportin was up-regulated by rhEpo administration, whereas no appreciable change in myoglobin levels was observed, which suggests unaltered muscle oxygen homeostasis. In conclusion, under rhEpo stimulation, the changes in the expression of muscle iron proteins indicate the occurrence of skeletal muscle iron accumulation despite the remarkable hepcidin suppression that may be mediated by several factors, such as rhEpo or decreased transferrin saturation or both.
journal_name
Bloodjournal_title
Bloodauthors
Robach P,Recalcati S,Girelli D,Gelfi C,Aachmann-Andersen NJ,Thomsen JJ,Norgaard AM,Alberghini A,Campostrini N,Castagna A,Viganò A,Santambrogio P,Kempf T,Wollert KC,Moutereau S,Lundby C,Cairo Gdoi
10.1182/blood-2008-09-178095subject
Has Abstractpub_date
2009-06-25 00:00:00pages
6707-15issue
26eissn
0006-4971issn
1528-0020pii
blood-2008-09-178095journal_volume
113pub_type
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