In vitro micronucleus bioassay of human peripheral lymphocytes for adriamycin in the presence of cyclophosphamide and urines of patients administered anticancer drugs

Modulation of doxorubicin-induced genotoxicity by Aegle marmelos in mouse bone marrow: a micronucleus study

The effect of various concentrations of Aegle marmelos (AME) on the doxorubicin (DOX)-induced genotoxic effects in mice bone marrow was studied. Treatment of mice with different concentrations of DOX resulted in a dose-dependent elevation in the frequency of micronucleated polychromatic (MPCE) as well as normochromatic (MNCE) erythrocytes in mouse bone marrow. The frequencies of MPCE and MNCE increased with scoring time, and the greatest elevation for MPCE was observed at 48 hours post-DOX treatment, whereas a maximum increase in MNCE was observed at 72 hours post-DOX treatment. This increase in MPCE and MNCE was accompanied by a decline in the polychromatic erythrocytes-normochromatic erythrocytes (PCE/NCE) ratio, which showed a DOX-dose-dependent decline. Treatment of mice with 200, 250, 300, 350, and 400 mg/kg body weight of AME, orally once daily for 5 consecutive days before DOX treatment, significantly reduced the frequency of DOX-induced micronuclei accompanied by a significant elevation in the PCE/NCE ratio at all scoring times. The greatest protection against DOX-induced genotoxicity was observed at 350 mg/kg AME. The protection against DOX-induced genotoxicity by AME may be due to inhibition of free radicals and increased antioxidant status.

Correlation between cell survival and micronuclei-induction in HeLa cells treated with adriamycin after exposure to various doses of gamma-radiation

The effect of 10 microg/ml of adriamycin (doxorubicin) post-treatment was studied in HeLa cells exposed to 0, 0.5, 1, 2 and 3 Gy of gamma radiation. The survival of HeLa cells declined in a dose dependent manner in both irradiation+PBS and irradiation+ADR groups. Treatment of adriamycin immediately after irradiation resulted in a significant decline in the cell survival. The surviving fraction of HeLa cells reduced to 0.61 after exposure to 0. 5 Gy in the irradiation+ADR group, whereas a similar effect (i.e. surviving fraction of 0.61) was obtained for 3 Gy in the irradiation+PBS group. In contrast, the frequency of micronuclei increased in a dose dependent manner in both irradiation+PBS and irradiation+ADR groups. A significant elevation in the frequency of micronuclei was observed in the latter when compared with the former group. The dose response for both groups was linear quadratic. The cell proliferation indices also showed a dose dependent decline in both the groups. The decline in the cell proliferation was significantly higher in the irradiation+ADR group when compared with the irradiation+PBS group. A close correlation between the cell survival and micronuclei induction was observed in both groups, where the cell survival declined with the elevation in the micronuclei frequency. The relationship between cell survival and micronuclei induction was linear quadratic.

Micronuclei-induction and its correlation to cell survival in HeLa cells treated with different doses of adriamycin

The treatment of HeLa cells with different concentrations of adriamycin (0, 5, 10, 25, 50 and 100 microg/ml) resulted in a significant and dose-dependent decline in the cell survival. Conversely, the frequency of micronuclei increased in a concentration-dependent manner. The micronuclei-induction and cell survival were found to be inversely related.

Urinary biological monitoring markers of anticancer drug exposure in oncology nurses

People handling anticancer drugs or their wastes may absorb these potent genotoxic agents. The aim of this study was to determine the utility of some general urinary markers among 24 female oncology nurses handling these drugs in comparison with 25 "unexposed" nurses. The markers were the Salmonella typhimurium reverse and forward mutation assays, total thioethers, and D-glucaric acid. The reverse mutation assay was the most specific and sensitive marker for anti-cancer drug exposure. Use of the marker battery was no great advantage as a screening tool relative to use of the reverse mutation assay alone. Better recording of work practices in nurse work logs would have improved interpretation of results.