CBA mice were given a single Desferal dose (50 mg/kg). The mice received 3H-Thymidine 1 hour before they were killed. They were killed 1, 2, 6, or 9 hours after Desferal. Radiometry, and autoradiography were used to determine the level of DNA synthesis. Desferal was found to stimulate splenic 3H-incorporation 3 hours after drug injection and to increase the DNA-synthesizing cell fraction. In contrast, the agent inhibited 3H-incorporation in the bone marrow and thymus 9 hours after injection. This suppressive affect was accompanied by a decrease in the DNA-synthesizing cell fraction in these organs. In the thymus, there was a significant increase in the DNA-synthesizing cell fraction among lymphoblasts 1 and 3 hours following the administration of Desferal.
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