Four weeks later, they were injected intraperitoneally with a designer receptors exclusively activated by designer drug (DREADD) agonist (compound 21) at 3 mg/kg in 90 l or 90 l 0
Four weeks later, they were injected intraperitoneally with a designer receptors exclusively activated by designer drug (DREADD) agonist (compound 21) at 3 mg/kg in 90 l or 90 l 0.2% DMSO in normal saline (vehicle), solvent for compound 21, 30 min before the one-hour conversation between familiar observers and mice with surgery. surgery mice before the surgery. Familiar observers developed anxious behavior after being with surgery mice. Surgery mice with familiar observers had less anxious behavior than surgery mice without interacting with familiar observers. Multiple brain regions including paraventricular thalamic nucleus (PVT) were activated in familiar observers. The activated cells in PVT contained orexin receptors. Injuring the neurons with ibotenic acid, antagonizing orexin signaling with an anti-orexin antibody or inhibiting neurons by chemogenetic approach in PVT abolished the consolation and…