Serum-stimulated cell cycle progression and stress protein synthesis in C3H10T1/2 fibroblasts treated with sodium arsenite
✍ Scribed by Roeland Van Wijk; Marij Welters; Jan E. M. Souren; Hans Ovelgonne; Fred A. C. Wiegant
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 899 KB
- Volume
- 155
- Category
- Article
- ISSN
- 0021-9541
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✦ Synopsis
In this work, we demonstrate that a nonlethal dose of arsenite administered to quiescent C3HlOT112 fibroblasts can enhance the mitogenic effect of suboptimal concentrations of serum. The mitogenic effect was dependent on the serum concentration and on the time interval between the administration of arsenite and that of serum. This suggests that rnitogen sensitivity changes in time after arsenite treatment. It is shown that the concentrations of arsenite that enhance the mitogenic effect of serum also increase the mRNA levels of c-fos, HSP68, and HSP84 and induce the specific synthesis of Heat Shock Proteins (HSPs). The physiological significance of this phenomenon is most likely to counteract the long-term toxic effect of arsenite by early induction of compensation for cell loss.