Sensitivity of different phases of the cell cycle to selected hepatotoxins in cultured liver-derived (BL9L) cells |
| |
Authors: | D N Skilleter A R Mattocks G E Neal |
| |
Institution: | MRC Toxicology Unit, Medical Research Council Laboratories, Carshalton, Surrey, UK. |
| |
Abstract: | 1. Many toxins are active against dividing cells and cytofluorometric analysis of synchronized dividing liver-derived (BL9L) cells has been employed to study the relative sensitivity of the G1(G0), S and G2/M phases of the cell cycle to selected hepatotoxins. 2. The cytotoxic metal beryllium, which inhibits cell division, caused a specific block at the G1 phase of the cell cycle. 3. Dehydroretronecine, an antimitotic metabolite of the hepatotoxic plant pyrrolizidine alkaloids, retarded progression of cells through the cell cycle with a consistent accumulation at the late S to G2 phase. 4. Exposure of cells to aflatoxin B1-8,9-epoxide, the putative carcinogenic metabolite of the hepatocarcinogen aflatoxin B1, particularly during the early period of S phase, produced morphologically transformed cells. |
| |
Keywords: | |
|
|