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Ferritin synthesis by monocyte‐derived macrophages in thalassemic patients with intrinsic iron overload
Author(s) -
Saab Ghaleb A.,
Jurjus Abdo,
Sarrou Elias A.
Publication year - 1987
Publication title -
european journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 84
eISSN - 1600-0609
pISSN - 0902-4441
DOI - 10.1111/j.1600-0609.1987.tb01146.x
Subject(s) - monocyte , ferritin , macrophage , medicine , immunology , chemistry , biochemistry , in vitro
Macrophage ferritin content was determined following culture of peripheral blood monocytes for a period of 8 d in 40% autologous plasma to render them mature macrophages. Ferritin content was measured prior to and following culture using the radioimmunoassay. The normal range of values was established in a group of 22 healthy volunteer blood donors. A significant increase in the ratio of macrophage/ monocyte ferritin was observed in every donor studied (range 1.2 ‐ 1.8, p < 0.001). Also, a further significant increase was observed when these macrophages were additionally incubated for 6 h with heterologous antibody‐coated sheep red blood cells (range 1.2 ‐ 1.57, p < 0.001). Finally, the same studies were performed on a group of thalassemic patients with and without intrinsic iron overload. Again there were significant increases in monocyte ferritin content following culture as well as ingestion of heterologous sheep red cells, with magnitudes similar to those obtained with normal donor monocytes. Therefore we could not demonstrate the presence of a cellular ferritin synthesis defect in macrophages of thalassemic patients with intrinsic iron overload to explain the uncontrolled absorption of dietary iron from their gut.