Pu. Devi et al., A METHOD TO SCORE MICRONUCLEI IN-VIVO USING CYTOCHALASIN B-INDUCED CYTOKINESIS BLOCK, Mutation research. Fundamental and molecular mechanisms of mutagenesis, 401(1-2), 1998, pp. 33-37
The present paper describes an in vivo micronucleus assay using Cytoch
alasin B (CyB). Mice bearing three different rumours, fibrosarcoma (Sw
iss albino mice), B16 F1 melanoma(C57 BL) and Ehrlich ascites carcinom
a (Swiss albino mice), were injected with repeated doses of CyB at dif
ferent time intervals and binucleate cells were scored at 24, 36, 48,
60 and 72 h after CyB injection. Tt was found that three doses of 3 2 + 2 mg/kg CyB administered intraperitoneally (i.p.) at 12-h interval
s effectively blocked cytokinesis. The maximum number of binucleated c
ells (BNC) was scored at 60 h after the last CyB dose. This dose sched
ule was also effective in scoring micronuclei in BNC after irradiation
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