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  • Title: Renal and extrarenal erythropoietin production in anaemic rats.
    Author: Erslev AJ, Caro J, Kansu E, Silver R.
    Journal: Br J Haematol; 1980 May; 45(1):65-72. PubMed ID: 7378330.
    Abstract:
    Rats were rendered anaemic by a single bleeding or by a single injection of phenylhydrazine. At various times after the onset of anaemia they were nephrectomized and challenged with a 6 h exposure to hypoxia. The erythropoietin titre observed at the end of this hypoxic period was corrected for renal erythropoietin induced by the anaemia alone, and the resulting extrarenal component was compared to total erythropoietin production of nephric rats in response to anaemia plus 6 h hypoxia. Extrarenal erythropoietin production was found to increase from 10.3% in normal rats to 12.5% in moderately anaemic rats to 15.1% in rats with severe bleeding anaemia. In phenylhydrazine-treated rats this extrarenal component was found to be 18.3% possibly due to stimulation of extrarenal erythropoietin by haemolysed red cells. Chronic phenylhydrazine administration resulted in splenomegaly and Kupffer cell hyperactivity but not in any further stimulation of extrarenal erythropoietin production.
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