We used the MOR agonist [D-Ala 2 , NMe-Phe 4 , Gly-ol 5 ]-enkephalin (DAMGO; H-2535, Bachem), GABAA receptor antagonist picrotoxin (PTX, P1675, Sigma-Aldrich), PKI (6221, Tocris), KT5720 (5720, Tocris), Forskolin (F3917, Sigma-Aldrich), Cycloheximide (0970, Tocris), ZD7288 (1000, Tocris), WIN55,212-2 (1038, Tocris), and Torin 2 (4248, Tocris).
Other reagents used for making solutions were purchased from Sigma-Aldrich or Fisher Scientific.