Therefore, mean methylation rates and mRNA expression of genes involved in dopaminergic neurotransmission as well as in synapse formation, function, and preservation, namely Drd2 and the “synapse-co-factors” DISC1, Syp, and Dtnbp1, were investigated in the cingulate and prefrontal cortex being in scope of current schizophrenia research15 and finally correlated with each other. This evidence concerns the gene DTNBP1 and schizophrenia.