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  • Blackwell Science Ltd  (1)
  • 1995-1999  (1)
  • 1975-1979
  • 1
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Induction of the prodynorphin gene occurs in a tissue-specific manner following different physiological stimuli. Using electrophoretic mobility shift assays, we studied the relative activity of the five major regulatory sites in the rat prodynorphin promoter. Prodynorphin cyclic AMP-responsive element 2 (DynCRE2), DynCRE3, and the noncanonical prodynorphin AP-1 (ncDynAP-1) regulatory sites control, in a coordinated manner, prodynorphin induction in the spinal cord after noxious stimulation, whereas prodynorphin up-regulation in supraoptic neurons is regulated predominantly by the ncDynAP-1. Conversely, prodynorphin transactivation in the ovaries upon gonadotrophin stimulation is controlled by DynCRE1 and DynCRE3. Our results support the idea that stimulus-specific changes in nuclear proteins establish a functional hierarchy among regulatory sites in the prodynorphin promoter and provide further insight in the molecular mechanisms that govern prodynorphin gene regulation.
    Type of Medium: Electronic Resource
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