Abstract
Anthramycin methyl ether (AME) was tested for its ability to suppress erythropoiesis in the mouse. AME was injected either subcutaneously or intraperitoneally in doses ranging from 0.2 to 1.0 mg/kg. Radioiron was injected intravenously at varying times after AME and the 48-hour uptake in peripheral erythrocytes was determined. When subcutaneous injections were used, a threshold dose of greater than 0.2 mg/kg was required to reduce the uptake of radioiron. Maximum suppression was noted at 1.0 mg/kg AME. Intraperitoneal injections were more effective than subcutaneous ones; a maximum suppression was noted after 0.6 mg/kg. The nadir of radioiron incorporation was noted between 24 and 48 h after AME (1.0 mg/kg, s. c.) injection. Recovery required 10–12 days after which a slight overshoot above 59Fe incorporation in normal mice was observed.