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SP2509是一种选择性histone demethylase LSD1抑制剂，IC50为 13 nM，对MAO-A，MAO-B，乳酸脱氢酶和葡萄糖氧化酶没有活性。 In AML cells, SP2509 inhibits the association of LSD1 with CoREST, increases promoter-specific H3K4Me3 and induces p53, p21 and C/EBPα. SP2509 also significantly inhibits the colony growth and induces apoptosis of OCI-AML3. In addition, SP2509 induces differentiation of cultured and primary AML cells, and exerts synergistic lethal activity when used in combination with panobinostat. In mice bearing OCI-AML3 xenografts, SP2509 (25 mg/kg i.p.) significantly improved the survival of the mice, while co-treatment with SP2509 and panobinostat exerts superior in vivo activity. SP2509 (HCI-2509)是一种选择性histone demethylase LSD1抑制剂，IC50为 13 nM，对MAO-A，MAO-B，乳酸脱氢酶和葡萄糖氧化酶没有活性。SP2509 可诱导凋亡并促进自噬。

Target	Value
LSD1 (Cell-free assay)	13 nM

在AML细胞中，SP2509抑制LSD1与CoREST联合，增加启动子特异性H3K4Me3，并诱导p53，p21和C/EBPα。SP250也显著抑制菌落生长，并诱导OCI-AML3的细胞凋亡。此外，SP2509诱导培养的和原代AML细胞的增殖，并且与panobinostat结合使用时，发挥协同致死性。

在负荷OCI-AML3异种移植物的小鼠体内，SP2509 (25 mg/kg i.p.)显著提高小鼠的存活率，与SP2509和panobinostat联合治疗发挥出优良的体内活性。