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  • Title: Methylation status of the reelin promoter region in the brain of schizophrenic patients.
    Author: Tochigi M, Iwamoto K, Bundo M, Komori A, Sasaki T, Kato N, Kato T.
    Journal: Biol Psychiatry; 2008 Mar 01; 63(5):530-3. PubMed ID: 17870056.
    Abstract:
    BACKGROUND: Hypermethylation of the reelin (RELN) promoter region and the reduced levels of its messenger RNA and protein have been implicated in the pathophysiology of schizophrenia. We intended a technical replication of recent studies that observed hypermethylation of CpG or CpNpG sites in the RELN promoter region in the brain of schizophrenic patients. METHODS: The DNA methylation status of the promoter region of RELN was examined by using the pyrosequencing method in the prefrontal cortices of 14 patients with schizophrenia and 13 control subjects. RESULTS: All of the CpG and two proposed CpNpG sites analyzed showed no detectable DNA methylation (< 5%) in both control subjects and patients with schizophrenia. No detectable DNA methylation was observed in both gray and white matter, excluding the possibility of cellular heterogeneity of start materials. CONCLUSIONS: We did not confirm the hypermethylation of the RELN promoter region in the brains of schizophrenic patients, suggested in the previous studies.
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