DLG4 and schizophrenia: Genetic variants of DLG4 are possibly associated with synaptic dysfunction, which results in DLG4-related synaptopathy; such conditions as neurodevelopmental disorders, intellectual disability (ID), develop of schizophrenia, autism spectrum disorder (ASD) and cerebral visual impairment (Xing et al., 2016; Tokunaga et al., 2024; Bosch et al., 2016; Moutton et al., 2018) are observed in individuals having it.