Abstract
Ornithine decarboxylase (ODC) activity is induced when epidermal cells are incubated for 5-12 hr in the presence of 10 μm-adriamycin (ADR). The magnitude and duration of ODC induction by 5 μm-daunomycin (DAU) are much smaller. At 10 μm, ADR does not alter DNA synthesis but DAU inhibits ODC activity and DNA synthesis by 40 and 60%, respectively. ADR (10 μm) and, to a lesser degree, DAU (5 μm) also enhance 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced ODC activity, but, in contrast to ADR, 10-50 μm-DAU inhibit the ODC response to TPA by 50% or more. The induction and superinduction of ODC activities by ADR and/or TPA are all inhibited by the Ca2+-channel blocker verapamil. The ODC-inducing activity of ADR, therefore, may have a role in the mechanism by which mouse epidermal cells escape from the cytotoxic activity of this anthracycline antibiotic.
| Original language | English |
|---|---|
| Pages (from-to) | 459-463 |
| Number of pages | 5 |
| Journal | Toxicology in Vitro |
| Volume | 6 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1992 |
All Science Journal Classification (ASJC) codes
- Toxicology
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