Local infusion of ghrelin into the lateral amygdala blocks extinction of conditioned taste aversion in rats.

•Intra-LA infusion of ghrelin blocks extinction of acquired CTA memory.•Intra-LA infusion of ghrelin blocks both extinction and acquisition through activation of the ghrelin receptor, GHS-R1a.•PI3K inhibitor only abolishes the suppression of ghrelin/GHS-R1a signaling on acquisition, but not on extinction.