NCIt definition : The mesylate salt form of seclidemstat, an orally available, reversible, noncompetitive
inhibitor of lysine-specific demethylase 1 (LSD1, or KDM1A), with potential antineoplastic
activity. Upon oral administration, seclidemstat reversibly inhibits LSD1, a demethylase
that suppresses the expression of target genes by converting the di- and mono-methylated
forms of lysine at position 4 of histone 3 (H3K4) to mono- and unmethylated H3K4,
respectively. LSD1 inhibition enhances H3K4 methylation and increases the expression
of tumor suppressor genes. This may lead to an inhibition of cell growth in LSD1-overexpressing
tumor cells. In addition, LSD1 demethylates mono- or di-methylated H3K9 which increases
gene expression of tumor promoting genes; inhibition of LSD1 promotes H3K9 methylation
and decreases transcription of these genes.;