Although there are differences in the results among studies, a decrease in parvalbumin expression in the prefrontal cortex has been confirmed in schizophrenia and autism (Beasley and Reynolds, 1997; Hashemi et al., 2017; Ariza et al., 2018; Kaar et al., 2019) (Table 2). This evidence concerns the gene PVALB and schizophrenia.