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In vivo and in vitro cytogenetic effects of the anti-tumor agent amsacrina (AMSA)
Abstract:
The genotoxic effect of AMSA, an anti-tumor agent, was evaluated using the micronucleus and anaphase-telophase tests. The doses assayed by the in vivo micronucleus test were 1.5, 3 and 6 mg/kg: they are within the range of those used in clinical trials. A significant increase of micronucleated cells (P less than 0.01) was observed in the three assayed doses, with a linear dose response (r 0.98). In the in vitro test, 3 drug concentrations, i.e. 10, 1 and 0.1 microgram/ml, were analyzed with the 2 higher doses. AMSA showed a marked inhibition of cellular replication, but with 0.1 microgram/ml it was possible to determine an increase (P less than 0.01) in aberrations in anaphase-telophase cells. Both studies clearly demonstrate the clastogenic effect of the drug, which should be taken into account when considering its carcinogenic risk.
Insights
The anti-tumor drug AMSA (Amsacrine) significantly increases genotoxic effects, causing DNA damage at clinical doses. Both in vivo and in vitro studies confirm its clastogenic potential, highlighting risks.
Area of Science:
- Pharmacology
- Toxicology
- Genetics
Background:
- Amsacrine (AMSA) is an anti-tumor agent used in clinical trials.
- Evaluating the genotoxic potential of anti-cancer drugs is crucial for assessing carcinogenic risk.
Purpose of the Study:
- To evaluate the genotoxic effects of Amsacrine (AMSA).
- To assess the clastogenic potential of AMSA using in vivo and in vitro assays.
Main Methods:
- In vivo micronucleus test with doses of 1.5, 3, and 6 mg/kg.
- In vitro anaphase-telophase test with drug concentrations of 10, 1, and 0.1 microgram/ml.
- Analysis of micronucleated cells and chromosomal aberrations.
Main Results:
- A significant, dose-dependent increase in micronucleated cells was observed in vivo (P < 0.01, r = 0.98).
- AMSA markedly inhibited cellular replication in vitro.
- A significant increase in anaphase-telophase cell aberrations was noted at 0.1 microgram/ml (P < 0.01).
Conclusions:
- Both studies demonstrate the clastogenic effect of AMSA.
- The genotoxic findings necessitate consideration of the drug's carcinogenic risk.