“The PKA activity was increased by 39 and 6% of the control, when 30 microM db cAMP … 0.1 microM forskolin were applied, respectively; the PKA activity in response to db cAMP and forskolin was reduced and enhanced, respectively, when the tissues were pretreated with 0.6 mM Mn.”
“The contractile depression caused by db cAMP was reduced and by forskolin was enhanced by pretreatment of the tissue with 0.6 mM Mn for 30 min.”