PMID- 9630520 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 assessment of micronuclei induction. PG - 63-75 AB - The micronucleus assay is a widely accepted method for evaluation of clastogens and aneugens. In the current study, acridine orange (AO) supravital staining was adapted for flow cytometric usage to assess micronucleated cells in rat bone marrow and spleen. Cyclophosphamide was used as a positive control test compound and results were compared to manual scoring in Wright-stained slides. In bone marrow, both manual and flow cytometric methods demonstrated positive dose response-trends for micronucleated polychromatic erythrocytes (MNPCE). Significant elevations in MNPCE were observed at all doses of cyclophosphamide, and comparisons between methods in bone marrow were not statistically different. The flow cytometric method was more sensitive in spleen samples, showing dose- and time-related increases in micronuclei compared with manual scoring. AO proved to be a sensitive discriminator of RNA and DNA, allowing distinct separation of polychromatic erythrocytes (PCE), normochromic erythrocytes (NCE), total nucleated cells (TNC), and micronucleated populations within both PCE and NCE regions. These results support the use of AO-based flow cytometry to provide a rapid and sensitive indicator of micronuclei inducers. 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 - 8N3DW7272P (Cyclophosphamide) RN - F30N4O6XVV (Acridine Orange) SB - IM MH - *Acridine Orange MH - Animals MH - Bone Marrow Cells/cytology MH - Cyclophosphamide/pharmacology MH - Evaluation Studies as Topic MH - Flow Cytometry/*methods MH - Micronucleus Tests/*methods MH - Rats MH - Spleen/cytology 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)00042-4 [pii] AID - 10.1016/s1383-5718(98)00042-4 [doi] PST - ppublish SO - Mutat Res. 1998 May 11;414(1-3):63-75. doi: 10.1016/s1383-5718(98)00042-4.