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Publication Abstract from PubMed

Lysine-specific demethylase 1 (LSD1/KDM1) demethylates histone H3, in addition to the tumor suppressor p53 and DNA methyltransferase 1 (Dnmt1), thus regulating eukaryotic gene expression by altering chromatin structure. Specific inhibitors of LSD1 are desired as anti-cancer agents, since LSD1 aberrations are associated with several cancers, and LSD1 inhibition restores the expression of abnormally silenced genes in cancerous cells. In this study, we designed and synthesized several candidate compounds to inhibit LSD1, based on the structures of LSD1 and monoamine oxidase B (MAO-B), in complex with an anti-depressant tranylcypromine (2-PCPA) derivative. The compound S2101 showed stronger LSD1 inhibition than tranylcypromine and the known small LSD1 inhibitors in LSD1 demethylation assays, with <i>k</i>_inact/<i>K_I</i> values of 4560 M ^-1 s ^-1. In comparison with tranylcypromine, the compound displayed weaker inhibition of the monoamine oxidases. The inhibition modes of the two 2-PCPA derivatives, 2-PFPA and S1201, were identified by determining the inhibitor-bound LSD1 structures, which revealed the enhanced stability of the inhibitor-FAD adducts by their interactions with the surrounding LSD1 residues. These molecules are potential pharmaceutical candidates for cancer or latent virus infection, as well as research tools for LSD1-related biological investigations.<i></i>

Structurally Designed <i>Trans</i>-2-phenylcyclopropylamine Derivatives Potently Inhibit Histone Demethylase LSD1/KDM1.,Mimasu S, Umezawa N, Sato S, Higuchi T, Umehara T, Yokoyama S Biochemistry. 2010 Jun 22. PMID:20568732^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.