Title : Dynamic regulation and involvement of the heat shock transcriptional response in arsenic carcinogenesis.

Pub. Date : 2006 May

PMID : 16447264






4 Functional Relationships(s)
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1 We show here that arsenite is a ubiquitous inducer of the heat shock response in mammalian cells: that it activated heat shock transcription factor 1 (HSF1) DNA-binding activity, enhanced hsp 70 promoter, and induced hsp70mRNA and synthesis of HSP chaperones. arsenite heat shock protein family A (Hsp70) member 4 Homo sapiens
2 We show here that arsenite is a ubiquitous inducer of the heat shock response in mammalian cells: that it activated heat shock transcription factor 1 (HSF1) DNA-binding activity, enhanced hsp 70 promoter, and induced hsp70mRNA and synthesis of HSP chaperones. arsenite heat shock protein family A (Hsp70) member 4 Homo sapiens
3 Using a high throughput hsp70 promoter-luciferase reporter assay, we observed a hormetic dose response where low concentrations of arsenite stimulated and high concentrations inhibited. arsenite heat shock protein family A (Hsp70) member 4 Homo sapiens
4 The effect of arsenite in inducing the hsp 70-luciferase reporter absolutely required a functional HSF1 as it was not observed in HSF1 minus cells but re-instated by expression of HSF1. arsenite heat shock protein family A (Hsp70) member 4 Homo sapiens