Abemaciclib methanesulfonate (LY2835219) is a specific and effective inhibitor of CDK4(IC50=2 nM) and CDK6(IC50=10 nM).

CDK4:2 nM, CDK6:10 nM

MsOH处理皮下和颅内胶质瘤模型（U87 mg）中,LY2835219以剂量依赖的方式抑制肿瘤生长.

在视网膜母细胞瘤中,LY2835219通过特异性抑制CDK4和6,使细胞周期停滞在G1期,抑制DNA合成,且抑制癌细胞生长。

Cells (5 × 103) are plated in 96 well plates. Cells are treated the next day for 24 to 48 hours and then assessed for caspase-3 activity by Caspase-Glo-3/7 Assay, as per manufacturer's instructions and a luminescence plate reader.

LY2835219 is dissolved in DMSO to a 10 mM concentration.? Cells are seeded in a 96-well plate, allowed to adhere overnight, and treated with DMSO control (0.1% v/v) or the indicated compounds for 72 h. Cell viability and proliferation are determined using a Cell Counting Kit according to the manufacturer's instructions. The interaction between LY2835219 and mTOR inhibitor is determined using CompuSyn. Combination index (CI) values of 1 indicates and additive drug interaction, whereas a CI of < 1 is synergistic and a CI of > 1 is antagonistic.