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Research Articles |
Erythropoietin is produced mainly by the kidneys and stimulates erythropoiesis in the bone marrow. Chronic renal failure is characterized by anemia, which is principally caused by erythropoietin deficiency. Recombinant human erythropoietin (r-hEPO) corrects the anemia of chronic renal disease and improves patient well-being, exercise tolerance, and cognitive function. The clinical pharmacology, efficacy, safety, and tolerance of r-hEPO are presented. Four major studies attest to r-hEPO's efficacy in the treatment of anemia of chronic renal disease and document potential toxicities of hypertension, iron deficiency, thrombosis, and bone pain. Careful attention to the extent of correction of the hematocrit, increased heparinization during hemodialysis therapy, and compliance with dietary restrictions may minimize the incidence and severity of adverse reactions. Resistance to r-hEPO may be due to iron deficiency, aluminum toxicity, or inflammation, including infection. Potential future uses of r-hEPO include the treatment of various other anemias, such as those seen in sickle cell anemia, rheumatoid arthritis, and autologous blood donation. Controlled clinical studies in these areas have not been reported.
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