ISSN:
1573-4919
Keywords:
chemical stress
;
HSP70 synthesis
;
gene regulation
;
heat shock factors
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
Notes:
Abstract It was reported that chemical stresses such as arsenite, cadmium or salicylate fail to induce synthesis of the inducible form of HSP70 (HSP70i). We report here that exposure of cells to higher doses of these chemical treatments induced significant synthesis of HSP70i in CHO cells as well as other cell lines. The synthesis of HSP70i is primarily regulated at the transcriptional level. Although all tested chemical treatments induced heat shock factor (HSF) binding to the heat shock element (HSE), HSP70i synthesis appears to be regulated by an alternative factor (CHBF) which constitutively binds to the HSE at 37°C. The treatments, which dissociate the HSE-CHBF complex, induced significant HSP70i synthesis. The treatments, which failed to induce HSP70i synthesis, still activated HSF binding to HSE but the HSE-CHBF complex remained as that of untreated control cells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00926737
