PMID- 1372701 OWN - NLM STAT- MEDLINE DCOM- 19920427 LR - 20190702 IS - 0027-5107 (Print) IS - 0027-5107 (Linking) VI - 278 IP - 2-3 DP - 1992 Feb-Mar TI - Micronucleus induction in mouse peripheral reticulocytes by 7,12-dimethylbenz[a]anthracene. PG - 169-73 AB - Micronucleus assays using mouse peripheral blood stained vitally on acridine orange (AO)-coated slides were evaluated at two laboratories with 7,12-dimethylbenz[a]anthracene (DMBA) and compared with the standard bone marrow assay. DMBA was administered by single intraperitoneal injection to CD-1 mice at doses ranging from 5 to 80 mg/kg, then 5 microliters of peripheral blood was sampled from a tail vein at 24, 48, 72, 96, and 120 h after treatment. Similar incidences of micronucleated young erythrocytes were observed in peripheral blood reticulocytes and bone marrow polychromatic erythrocytes. The dose response of micronucleated reticulocytes was delayed compared to that of micronucleated polychromatic erythrocytes. The dose-response curves after treatment with DMBA differed depending on the sampling times, which revealed the difficulty of obtaining accurate dose-response relations in the micronucleus assay. The present result demonstrated that the simple and rapid AO supravital staining method is a valuable and easier method for obtaining dose- and time-response data for quantification of micronucleus induction by chemicals. FAU - Suzuki, T AU - Suzuki T AD - Division of Genetics and Mutagenesis, National Institute of Hygiene Sciences, Tokyo, Japan. FAU - Tamai, K AU - Tamai K FAU - Kodama, Y AU - Kodama Y FAU - Asita, A O AU - Asita AO FAU - Matsuoka, A AU - Matsuoka A FAU - Sofuni, T AU - Sofuni T FAU - Kurita, M AU - Kurita M FAU - Ohtsuki, H AU - Ohtsuki H FAU - Hiwatashi, T AU - Hiwatashi T FAU - Hayashi, M AU - Hayashi M LA - eng PT - Comparative Study PT - Journal Article PL - Netherlands TA - Mutat Res JT - Mutation research JID - 0400763 RN - 0 (Mutagens) RN - 57-97-6 (9,10-Dimethyl-1,2-benzanthracene) SB - IM MH - 9,10-Dimethyl-1,2-benzanthracene/*toxicity MH - Animals MH - Bone Marrow/drug effects/pathology MH - Dose-Response Relationship, Drug MH - Male MH - Mice MH - Mice, Inbred Strains MH - Micronucleus Tests/methods MH - Mutagens/*toxicity MH - Reticulocytes/*drug effects EDAT- 1992/02/01 00:00 MHDA- 1992/02/01 00:01 CRDT- 1992/02/01 00:00 PHST- 1992/02/01 00:00 [pubmed] PHST- 1992/02/01 00:01 [medline] PHST- 1992/02/01 00:00 [entrez] AID - 0165-1218(92)90229-S [pii] AID - 10.1016/0165-1218(92)90229-s [doi] PST - ppublish SO - Mutat Res. 1992 Feb-Mar;278(2-3):169-73. doi: 10.1016/0165-1218(92)90229-s.