Here, various studies described region-specific differences either in the number of astrocytes or in the expression levels of astrocyte-specific markers like the glial fibrillary acidic protein (GFAP), the aldehyde dehydrogenase 1 L1 (ALDH1L1) or the glutamate transporter-1 (GLT-1) in postmortem tissue samples of schizophrenia patients [155,156,157]. The gene discussed is GFAP; the disease is schizophrenia.