Chronic elevation of cAMP levels induces changes in the adenylate cyclase system, opiate receptor sensitivity and levels of Gs-mRNA in cultured neurons Academic Article uri icon


  • Neurons in primary culture were treated (5 days) with the adenylate cyclase stimulator 10(-5) M forskolin. The basal adenylate cyclase was decreased by 57%. The acute stimulatory effect of forskolin was down-regulated by 48%. The inhibitory effects of the 3 opiate receptor agonists (mu, delta and kappa) were partly abolished. The abundance of mRNA encoding the stimulatory G-protein (Gs) was decreased prominently. The data indicate that the cAMP system in neuronal cells in primary culture is under dynamic regulation, possibly including altered Gs-protein gene expression. Furthermore, long-term forskolin treatment might induce increased proliferation in susceptible neural blast cells.


  • Eriksson, Peter S
  • Nilsson, Michael
  • Carlsson, Björn
  • Isaksson, Olle GP
  • Rönnbäck, Lars
  • Hansson, Elisabeth

publication date

  • January 1992