Erythropoiesis in chronic renal disease.

The diminished erythropoiesis in the anemia of chronic renal disease has been attributed to three possible factors: (1) decreased erythropoietin production, (2) inhibition of erythropoietin activity, and (3) decreased bone marrow response to erythropoietin. In this report we isolated and evaluated these parameters in 19 patients with chronic renal disease, nine patients with iron-deficiency anemia, and seven control subjects. The results in patients with chronic renal failure were as follows: (1) erythropoietin enhanced heme synthesis in bone marrow cell cultures by 88 +/- 12 per cent in renal failure, as compared to 65 +/- 7 per cent in the control group; (2) plasma erythropoietin activity did not increase appropriately for the degree of anemia; and (3) erythropoietin inhibitor activity in renal failure was not greater than in a control group. In conclusion, the relative failure of erythropoiesis in chronic renal disease appears to be due primarily to decreased production of erythropoietin and not to diminished marrow response to erythropoietin.