Naslov
Treatment of the budding yeast Sacharomyces cerevisiae with the lipid peroxydation product 4-HNE provokes a temporary cell cycle arrest in G1phase

Autori
Wonisch, Willibald ; Kohlwein, Sepp D. ; Schaur, Jork ; Tatzber, Franz ; Guttenberger, Helmut ; Žarković, Neven ; Winkler, Rudolf ; Esterbauer, Hermann

Izvornik
Free Radical Biology and Medicine (0891-5849) 25 (1998), 6; 682-687

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cell cycle; lipid peroxidation; HNE; Saccharomyces cerevisiae
(Cell cycle; cell cycle; lipid peroxidation; HNE; Saccharomyces cerevisiae)

Sažetak
The effects of 4-hydroxy-2-nonenal (HNE) on the cell division cycle were investigated in the yeast Saccharomyces cerevisiae. A short treatment with HNE at a concentration in the range of the IC50 value in S. cerevisiae SP-4 cells induced a significant increase in the proportion of G(0)/G(1) cells at the expense of S-phase cells. A similar delay in cell cycle progression upon treatment with HNE has recently been shown for HL-60 neoplastic cells. Long-term exposure in a synchronized yeast culture resulted in a pronounced dose-dependent block between G(0)/G(1)- and S-phase, probably at or close to a point in the cell cycle that has been designated as ''START.'' Incorporation of radioactively labeled precursors of macromolecules revealed that DNA synthesis was most susceptible to HNE in comparison to RNA and protein synthesis. Production of glutathione appeared to be required for the continuation of the cell cycle. HNE-treated yeast cells reentered the cell cycle when their glutathione content exceeded about twice the level of control cells. The release from the cell division cycle delay was followed by an enhanced growth to an extent that HNE-treated cells exceeded the number of control cells. These results indicate that HNE causes a biphasic modulation of cell proliferation. It was concluded that this effect was conserved during evolution from yeast to mammalian cells, emphasizing once more the usefulness of this unicellular organism as a model system for the investigation of the effects of free radical-derived products on the proliferation of eukaryotes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija, Temeljne medicinske znanosti

POVEZANOST RADA