PMID- 9630510 OWN - NLM STAT- MEDLINE DCOM- 19980722 LR - 20190702 IS - 0027-5107 (Print) IS - 0027-5107 (Linking) VI - 414 IP - 1-3 DP - 1998 May 11 TI - Use of acridine orange in: flow cytometric evaluation of erythropoietic cytotoxicity. PG - 49-61 AB - Cytotoxic insult to bone marrow frequently impairs the proliferating and maturational abilities of erythroid cells. Typically, a ratio of enucleated, immature polychromatic erythrocytes (PCE) to mature normochromatic erythrocytes (NCE) is used to assess cytotoxicity in the micronucleus (MN) assay. The effects of cyclophosphamide (CP) on PCE/NCE ratio in rat bone marrow and spleen were assessed by a newly developed flow cytometric procedure using glutaraldehyde-fixed, acridine orange (AO)-stained cells, and compared to manual scoring of PCE/NCE in Wright stained slides. Comparison of methods showed that manual and flow cytometric determination of PCE were not statistically different. Several other parameters of cytotoxicity could be simultaneously assessed because the method allowed use of unfractionated whole bone marrow/spleen cell samples. Absolute numbers of total nucleated cells (TNC), a ratio of TNC to total erythrocytes (TE), and determination of RNA content within the PCE population demonstrated dose- and time-dependent effects with CP treatment. Shifts in RNA content were particularly sensitive, correctly identifying all CP-treated from control specimens, even in those samples where PCE/NCE ratio was similar. The AO methodology provided a more rapid, statistically-superior, and thorough approach in the assessment of bone marrow and spleen cytotoxicity than the conventional manual method of scoring PCE/NCE ratio alone. CI - Copyright 1998 Elsevier Science B.V. FAU - Criswell, K A AU - Criswell KA AD - Pathology and Experimental Toxicology, Parke-Davis Pharmaceutical Research, Warner-Lambert, Ann Arbor, MI 48105, USA. criswek@aa.wl.com FAU - Krishna, G AU - Krishna G FAU - Zielinski, D AU - Zielinski D FAU - Urda, G A AU - Urda GA FAU - Theiss, J C AU - Theiss JC FAU - Juneau, P AU - Juneau P FAU - Bleavins, M R AU - Bleavins MR LA - eng PT - Comparative Study PT - Journal Article PL - Netherlands TA - Mutat Res JT - Mutation research JID - 0400763 RN - 0 (Alkylating Agents) RN - 63231-63-0 (RNA) RN - 8N3DW7272P (Cyclophosphamide) RN - F30N4O6XVV (Acridine Orange) SB - IM MH - *Acridine Orange MH - Alkylating Agents/pharmacology MH - Animals MH - Bone Marrow Cells/physiology MH - Cell Death MH - Cyclophosphamide/pharmacology MH - Erythrocytes/*physiology MH - Erythroid Precursor Cells/*physiology MH - Flow Cytometry/*methods MH - Micronucleus Tests/*methods MH - RNA/analysis MH - Rats MH - Spleen/physiology EDAT- 1998/06/19 00:00 MHDA- 1998/06/19 00:01 CRDT- 1998/06/19 00:00 PHST- 1998/06/19 00:00 [pubmed] PHST- 1998/06/19 00:01 [medline] PHST- 1998/06/19 00:00 [entrez] AID - S1383-5718(98)00041-2 [pii] AID - 10.1016/s1383-5718(98)00041-2 [doi] PST - ppublish SO - Mutat Res. 1998 May 11;414(1-3):49-61. doi: 10.1016/s1383-5718(98)00041-2.