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Research Article Free access | 10.1172/JCI108583

The effects of colcemid on hematopoiesis in the mouse.

P A Bunn Jr, S E Shackney, and S S Ford

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Published November 1, 1976 - More info

Published in Volume 58, Issue 5 on November 1, 1976
J Clin Invest. 1976;58(5):1280–1285. https://doi.org/10.1172/JCI108583.
© 1976 The American Society for Clinical Investigation
Published November 1, 1976 - Version history
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Abstract

Colcemid was found to induce a dose and schedule dependent marrow magakaryocytosis and peripheral thrombocytosis. The response could be divided into early and late components. The early component appears to have been due to a direct stimulatory effect, probably by enhancement of endoreduplication in metaphase arrested megakaryocyte precursors. The ealy stimulatory response was blunted on toxic drug schedules. In contrast, the late component of the thrombopoietic response was demonstrated best on the most toxic drug schedules. It coincided temporally with the reactive restoration of the mononuclear marrow and blood cell elements, respectively. Thus, the late component appears to be a nonspecific rebound phenomenon. On comparing the thrombopoietic properties of Colcemid with those of the vinca alkaloids in experimental systems, the former appears to have a more favorable therapeutic index. The data suggest that colchicine and its derivatives may be useful agents in the treatment of clinical thrombocytopenic states.

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