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Glucose stimulation induces expression of the transcription factors Egr-1 and c-Jun as well as phosphorylation of CREB and c-Jun in insulinoma cells. The activator protein-1 (AP-1) binding sites within the c-Jun promoter, the serum response elements (SREs) within the Egr-1 promoter, and cyclic AMP response elements (CREs) function as glucose responsive element. Glucose-induced transcriptional regulation...
The biosynthesis of the zinc finger transcription factor Egr-1 is stimulated by many extracellular signaling molecules including hormones, neurotransmitters, growth and differentiation factors. The Egr-1 gene represents a convergence point for many intracellular signaling cascades. An increase of the intracellular Ca 2+ concentration, by activating ionotropic or Gα q/11 -coupled receptors...
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