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Flow cytometric detection of erythropoietic cytotoxicity in mouse bone marrow

VM Benning, MB Maratrat, EC Fournier, CP Melcion and AC Cordier

Rhone-Poulenc Sante, Centre de Recherche de Vitry-Alfortville, Institut de Recherche sur la Securite du Medicament, Vitry sur Seine, France.

Erythroblast proliferation and maturation in bone marrow are the processes leading to the formation of polychromatic erythrocytes (PE) and normochromatic erythrocytes (NE), respectively. PE contain RNA but no DNA, and can therefore be distinguished both from NE (which lack both RNA and DNA) and from nucleated cells (which contain both DNA and RNA). Cytotoxic agents that induce impairment of the maturation process change the PE:NE ratio. We have developed a simple and rapid method of determining the PE:NE ratio, based on flow cytometric analysis of formaldehyde-fixed, acridine orange (AO)-stained cells. The effects of cyclophosphamide (CP), mitomycin C (MMC), and vincristine (VC) were tested and the PE:NE ratio was evaluated over 7 days of treatment. In this study we monitored the kinetics of these compounds and were able to demonstrate both a time- and a dose-dependent effect. We detected a difference between the effects of the alkylating agents tested and those induced by the spindle inhibitor tested. Flow cytometry of fixed bone marrow samples stained with AO provides more information, better and more rapid statistical analysis, than conventional microscopic methods for counting the PE:NE ratio.

Volume 39, Issue 1, pp. 15-21, 01/01/1991
Copyright © 1991 by The Histochemical Society


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