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Long-term intermittent hyperoxic exposures do not enhance erythropoiesis.
MedLine Citation:
PMID:  21834800     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Eur J Clin Invest 2011 ABSTRACT: Background  Based on a report of a marked increase in the erythropoietin concentration ([EPO]) a few hours after the cessation of a single 2-h session of O(2) breathing, short periods of O(2) administration have been advocated as a therapy for anaemia. Accordingly, the purpose of the present study was to evaluate this theory by investigating the effect of 10 daily short-term exposures to normobaric O(2) over a 2-week period on the plasma [EPO] in healthy individuals. Material and methods  Twenty men were assigned to either an experimental (NBO(2) ) or to a control (AIR) group. The NBO(2) group breathed 100% normobaric O(2) for 2 h every weekday over a 2-week period. The AIR group breathed air within the same time protocol. Blood samples were collected at the pre-, mid- and post-intervention periods to determine [EPO]. Results  [EPO] of the NBO(2) group was significantly lower than that of the AIR group during the mid- and post-periods (P < 0·001). [EPO] of the NBO(2) group showed a slight, albeit statistically nonsignificant, decrease during the mid (∼ 11%)- and post (∼ 16%)-periods. Conclusions  Daily short-term exposures to normobaric hyperoxia do not increase the [EPO] in healthy individuals. The increased O(2) tension suppresses [EPO]. Hence, administration of pure O(2) to enhance erythropoiesis is not warranted.
Authors:
Michail E Keramidas; Barbara Norman; Thomas Gustafsson; Ola Eiken; Igor B Mekjavic
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-13
Journal Detail:
Title:  European journal of clinical investigation     Volume:  -     ISSN:  1365-2362     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-8-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0245331     Medline TA:  Eur J Clin Invest     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 The Authors. European Journal of Clinical Investigation © 2011 Stichting European Society for Clinical Investigation Journal Foundation.
Affiliation:
Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia Jozef Stefan International Postgraduate School, Ljubljana, Slovenia Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden.
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