ERBB4 and schizophrenia: Although astrocytic SynCAM1 is functionally linked to erbB4 receptor function, and alterations in ligand-induced erbB4 signaling have been associated to the physiopathology of schizophrenia [[52], [53] and references therein], we did not observe differences in PPI between GFAP-DNSynCAM1 mice and their WT littermates.