GFAP and schizophrenia: Another study evaluating GFAP protein expression by western blot of various brain regions of 23 schizophrenics, including the dorsolateral prefrontal cortex, visual cortex, anterior cingulate cortex, hippocampus and temporal gyrus, failed to detect any changes in GFAP protein expression in schizophrenia, except for a significant decrease in the anterior cingulate cortex.66