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  • Title: An inappropriate erythropoietic response to iron deficiency anaemia in the elderly.
    Author: Matsuo T, Kario K, Kodoma K, Asada R.
    Journal: Clin Lab Haematol; 1995 Dec; 17(4):317-21. PubMed ID: 8697726.
    Abstract:
    This study was carried out to clarify the features of iron deficiency anaemia in the elderly. Subjects were chosen from residents undergoing an annual health check in a home for the aged and the features of anaemia in the elderly were compared with those in middle-aged adults under 60 years old. The red cell count, red cell size and haemoglobin content in an elderly group with iron-deficiency anaemia did not differ from those in middle-aged adults. No significant differences of the serum ferritin and iron levels were noted between the two groups. Total iron binding capacity was higher in the middle-aged adults than in the elderly, while the reticulocyte count was significantly lower in the elderly group. Immature reticulocytes showing a considerable amount of residual RNA by flow cytometry with fluorescent staining were also lower in the elderly group than in the middle-aged adults. Serum erythropoietin levels in both groups were significantly higher than in non-anaemic age-matched controls and no difference in erythropoietin levels was noted between them. The ratio of the reticulocyte count to the log-transformed erythropoietin level was low in the elderly group with iron-deficiency anaemia compared with the middle-aged adults with iron deficiency anaemia. The same result was seen when the immature reticulocyte count was related to the log-transformed erythropoietin level. These findings suggest that the red cell production response to erythropoietin in the elderly with iron-deficiency anaemia might be inappropriate compared with both non-anaemic and anaemic middle-aged adults.
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