For instance, differential DNA methylation patterns between OCD patients and healthy control probands have been described for the oxytocin receptor ( OXTR ) gene [ 4 – 7 ], the serotonin transporter ( SLC6A4 ) gene [ 8 ], the monoamine oxidase A ( MAOA ) gene [ 9 ], the brain-derived neurotrophic factor ( BDNF ) gene [ 10 ], and, on a nominally significant level, the gamma-aminobutyric acid B receptor 1 ( GABBR1 ), estrogen receptor 1 ( ESR1 ), myelin oligodendrocyte glycoprotein ( MOG ) genes and again the brain-derived neurotrophic factor ( BDNF ) gene [ 11 ].
1
—
—