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The importance of serum transferrin receptor level in the diagnosis of functional iron deficiency due to recombinant human erythropoietin treatment in haemodialysis patients

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Abstract

In haemodialysis (HD) patients, functional iron deficiency frequently appears due to recombinant human erythropoietin (r-HuEPO) treatment. However, the diagnosis of iron deficiency is not always easy in such patients. Recent studies have shown that the serum transferrin receptor (s-TfR) level is a sensitive, quantitative measure of tissue iron deficiency. In this study, we examined the changes in s-TfR levels in patients with iron deficiency anaemia due to r-HuEPO treatment.

We compared s-TfR levels of 24 patients with i.v. administered r-HuEPO 50–70 U/kg/dose) at the end of each dialysis session (three times a week) and diagnosed as having iron deficiency anaemia by routine laboratory methods (ferritin<50 μg/l and transferrin saturation<16%) with s-TfR levels of 32 patients not receiving r-HuEPO and without iron deficiency anaemia. Also, 40 healthy volunteer subjects were included in the study as a control group. Serum ferritin and transferrin receptor levels were measured with ELISAs using monoclonal reagents. There were no differences between the two groups with and without iron deficiency anaemia with respect to mean age, body weight, haemodialysis duration, haemoglobin and serum creatinine levels (p>0.05). For s-TfR levels, while no difference was present between the control and the non-iron deficiency groups (p>0.05), the iron deficiency group had higher s-TfR values than those of both the control and non-iron deficiency groups (p<0.001). Besides, there was an inverse correlation between haemoglobin and s-TfR levels in patients with iron deficiency anaemia (r=−0.85, p<0.0001).

We conclude that the measurement of s-TfR levels may be useful in the diagnosis of functional iron deficiency in haemodialysis patients receiving r-HuEPO.

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Authors and Affiliations

  1. Department of Nephrology, Medical Faculty, Atatürk University, Erzurum, Turkey

    H. Z. Tonbul, N. Y. Selçuk & A. San

  2. Department of Haematology, Medical Faculty, Atatürk University, Erzurum, Turkey

    H. Kaya, S. B. Tekin & E. Akarsu

  3. Department of Biochemistry, Medical Faculty, Atatürk University, Erzurum, Turkey

    F. Akçay

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  1. H. Z. Tonbul
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  2. H. Kaya
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  3. N. Y. Selçuk
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  4. S. B. Tekin
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  5. A. San
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  6. F. Akçay
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  7. E. Akarsu
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Tonbul, H.Z., Kaya, H., Selçuk, N.Y. et al. The importance of serum transferrin receptor level in the diagnosis of functional iron deficiency due to recombinant human erythropoietin treatment in haemodialysis patients. International Urology and Nephrology 30, 645–651 (1998). https://doi.org/10.1007/BF02550560

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