Document Detail

Transferrin receptor expression on reticulocytes as a marker of iron status in dialyzed patients.
MedLine Citation:
PMID:  20604729     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Erythropoietin therapy should be accompanied by an adequate iron supply in order to avoid functional iron deficiency (FID) related to enhanced erythropoiesis. Therefore, accurate monitoring of the body's iron homeostasis is needed. This study was conducted to investigate whether transferrin receptor (TfR) expression on reticulocytes can reflect iron status in patients with chronic renal failure (CRF).
METHODS: TfR expression [antibody binding capacity (ABC)] and the proportion of TfR positive reticulocytes (%TfR+ Ret) relative to all reticulocytes were measured by a quantitative flow cytometric method at baseline and at 3 weeks in 34 dialysis patients. Iron status (plasma ferritin and soluble TfR) and hemoglobin (Hb) with advanced cellular indices, such as the percentage of hypochromic reticulocytes (%HYPOr) and cellular Hb in reticulocytes (CHr), were also analyzed.
RESULTS: Patients with FID had significantly higher TfR ABC and %TfR+ Ret compared with patients with replete iron status (p=0.034 and p=0.006, respectively). In patients whose Hb concentrations showed a reduction, the mean increase (3 weeks- baseline) in TfR ABC was four-fold higher and %TfR(+)Ret was three-fold higher when compared with patients whose Hb was stable or had increased. The changes in TfR expression correlated significantly with the changes in reticulocyte indices [CHr (negatively), %HYPOr (positively)] and plasma ferritin (negatively).
CONCLUSIONS: Reticulocyte TfR expression reflected the changes in the Hb level and the iron availability at the cellular level, and therefore it might be useful in the assessment of iron status in patients with CRF.
Kati Soininen; Kari Punnonen; Irma Matinlauri; Pauli Karhapää; Mari Rehu
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Clinical chemistry and laboratory medicine : CCLM / FESCC     Volume:  48     ISSN:  1434-6621     ISO Abbreviation:  Clin. Chem. Lab. Med.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-22     Completed Date:  2011-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806306     Medline TA:  Clin Chem Lab Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1239-45     Citation Subset:  IM    
Department of Clinical Chemistry, University of Eastern Finland, and Eastern Finland Laboratory Centre (ISLAB), Kuopio, Finland.
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MeSH Terms
Aged, 80 and over
Biological Markers / metabolism
Gene Expression Regulation*
Hemoglobins / metabolism
Iron / administration & dosage,  metabolism*
Kidney Failure, Chronic / blood,  metabolism,  therapy
Middle Aged
Receptors, Transferrin / immunology,  metabolism*
Renal Dialysis*
Reticulocytes / metabolism*
Reg. No./Substance:
0/Biological Markers; 0/Hemoglobins; 0/Receptors, Transferrin; 7439-89-6/Iron

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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