Endogenous regulator of G protein signaling proteins suppress Galphao-dependent, mu-opioid agonist-mediated adenylyl cyclase supersensitization.


Chronic mu-opioid agonist treatment leads to dependence with withdrawal on removal of agonist. At the cellular level withdrawal is accompanied by a supersensitization of adenylyl cyclase, an effect that requires inhibitory Galpha proteins. Inhibitory Galpha protein action is modulated by regulator of G protein signaling (RGS) proteins that act as GTPase… (More)


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