alexa Histone H3 lysine 4 demethylation is a target of nonselective antidepressive medications.
Molecular Biology

Molecular Biology

Cell & Developmental Biology

Author(s): Lee MG, Wynder C, Schmidt DM, McCafferty DG, Shiekhattar R

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Abstract Demethylation of histone H3 lysine 4 is carried out by BHC110/LSD1, an enzyme with close homology to monoamine oxidases (MAO). Monoamine oxidase A or B are frequent targets of selective and nonselective small molecular inhibitors used for treatment of depression. Here we show that in contrast to selective monoamine oxidase inhibitors such as pargyline, nonselective monoamine oxidase inhibitors potently inhibit nucleosomal demethylation of histone H3 lysine 4. Tranylcypromine (brand name Parnate) displayed the best inhibitory activity with an IC50 of less than 2 microM. Treatment of P19 embryonal carcinoma cells with tranylcypromine resulted in global increase in H3K4 methylation as well as transcriptional derepression of two BHC110 target genes, Egr1 and the pluripotent stem cell marker Oct4. These results attest to the effectiveness of tranylcypromine as a small molecular inhibitor of histone demethylation. This article was published in Chem Biol and referenced in Cell & Developmental Biology

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