Abstract
Short-term effects of recombinant human erythropoietin on serum levels of transforming growth factor β-1, interleukin 1-a, interleukin 3, interferon ?, and tumour necrosis factor a in patients with chronic renal failure on chronic haemodialysis were investigated. Recombinant human erythropoietin was applied subcutaneously in a dose of 75 IU/kg on 19 patients. Serum levels of transforming growth factor β-1, interleukin 1-a, interleukin 3, interferon ?, tumour necrosis factor a and erythropoietin, red blood cell parameters: red blood cell count, haemoglobin, haematocrit, and erythrocyte indices were determined before and after recombinant human erythropoietin single application. Transforming growth factor β-1 serum levels were decreased after recombinant human erythropoietin (22.70 ± 1.51 ng/ml versus 18.77 ± 1.70 ng/ml (p < 0.01). None of the other investigated parameters was influenced significantly by recombinant human erythropoietin. Recombinant human erythropoietin in patients with chronic renal failure on chronic haemodialysis may influence anaemia not only through its stimulating effect on erythropoiesis, but also by direct oxygen-independent decrease of at least one of the negative regulators of erythropoiesis – the transforming growth factor β.
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