Serotonin-induced or neurotensin-induced reversal was blocked by β-ARK1 inhibitor, dynasore, or << cPKC >> antagonist 5,6,7,13-tetrahydro-13-methyl-5-oxo-12H-indolo[2,3-a]pyrrolo[3,4c]carbazole-12-propanenitrile ([[ Gö6976 ]]).