GLP1R and major depressive disorder: Glucagon-like peptide-1 receptor (GLP-1R) is an incretin hormone that has been shown to improve memory deficits in a variety of diseases (Liarakos et al., 2023; Sharma et al., 2018), including bipolar disorder, diabetes-related depression and cognitive impairment (Cooper et al., 2023), and depression (Dumiaty et al., 2024).