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Influences of sleep and the circadian rhythm on iron-status indices
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical Chemistry. (Anders Larsson)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical Chemistry.
Karolinska Institutet.
Karolinska Institutet.
2010 (English)In: Clinical Biochemistry, ISSN 0009-9120, E-ISSN 1873-2933, Vol. 43, no 16-17, 1323-1328 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: The aim was to study the influence of sampling time, food intake and sleep on tests used to screen for and monitor conditions of iron deficiency and overload. DESIGN AND METHODS: The 24 h variations of iron, transferrin, transferrin saturation (TS) and ferritin were studied in seven healthy individuals during standardised food intake, and during night or day sleep. RESULTS: Iron and TS showed clear diurnal variations, with peaks at 12.6 h and 12.8 h respectively, during night sleep, and at 19.7 h and 19.3 h, respectively, during day sleep. Ferritin did not demonstrate any circadian variation. Transferrin and ferritin were unaffected by sleep-condition. Meals did not have any effect except a slight decline of transferrin. CONCLUSIONS: Time of day and sleeping patterns had great influence on iron and TS, whereas no or only minor effects are seen on the concentration of ferritin and transferrin. Meals have limited effects.

Place, publisher, year, edition, pages
2010. Vol. 43, no 16-17, 1323-1328 p.
Keyword [en]
Iron; Transferrin; Transferrin saturation; Ferritin; Circadian rhythm; Sleep deprivation
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-132481DOI: 10.1016/j.clinbiochem.2010.08.023ISI: 000283041500010PubMedID: 20800590OAI: oai:DiVA.org:uu-132481DiVA: diva2:358140
Available from: 2010-10-21 Created: 2010-10-21 Last updated: 2010-12-07Bibliographically approved

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