HIVEP2 and schizophrenia: Shn-2 KO mice, a mouse model of schizophrenia with iDG in the hippocampus, showed a decrease in the number of PV-positive cells in the frontal cortex, without signs of neurodegeneration in either region[11], which suggests that the immature signature can be seen in the mutant mice not only in the hippocampus but also in the frontal cortex.