Abemaciclib mesylate (LY2835219)

Selective CDK Inhibitors

BS-181 HCl : CDK7-selective, IC50=21 nM.

Selective CDK Inhibitors

SNS-032 (BMS-387032) : CDK2-selective, IC50=48 nM.

CDK Inhibitor in Clinical Trial

Palbociclib (PD0332991) Isethionate : Phase III for Metastatic Breast Cancer.

Newest CDK Inhibitor

NU6027 : Potent ATR/CDK inhibitor, inhibits CDK1/2, ATR and DNA-PK with K_i of 2.5 μM/1.3 μM, 0.4 μM and 2.2 μM, enter cells more readily than the 6-aminopurine-based inhibitors.

Classic CDK Inhibitor

Palbociclib (PD-0332991) HCl : Highly selective inhibitor of CDK4/6 with IC50 of 11 nM/16 nM. It shows no activity against CDK1/2/5, EGFR, FGFR, PDGFR, InsR, etc. Phase 2/3.

SU9516 ^New

SU 9516 is a 3-substituted indolinone CDK inhibitor with IC50 of 22 nM, 40 nM, and 200 nM for CDK2, CDK1, and CDK4, respectively.

Ro-3306 ^New

RO-3306 is an ATP-competitive, and selective CDK1 inhibitor with K_i of 20 nM, >15-fold selectivity against a diverse panel of human kinases. RO-3306 enhances p53-mediated Bax activation and mitochondrial apoptosis.

Purvalanol A ^New

Purvalanol A is a potent, and cell-permeable CDK inhibitor with IC50 of 4 nM, 70 nM, 35 nM, and 850 nM for cdc2-cyclin B, cdk2-cyclin A, cdk2-cyclin E, and cdk4-cyclin D1, respectively. Purvalanol A induces endoplasmic reticulum stress-mediated apoptosis and autophagy.

Palbociclib (PD-0332991) HCl

Palbociclib (PD-0332991) HCl is a highly selective inhibitor of CDK4/6 with IC50 of 11 nM/16 nM in cell-free assays, respectively. It shows no activity against CDK1/2/5, EGFR, FGFR, PDGFR, InsR, etc. Phase 3.

Features:Non-cytotoxic, and halts cancer cell growth & could be used in glioblastoma that has relapsed after temozolomide treatment (a chemotherapeutic used to treat many cancers).

Palbociclib (PD0332991) Isethionate

Palbociclib (PD0332991) Isethionate is a highly selective inhibitor of CDK4/6 with IC50 of 11 nM/16 nM in cell-free assays. It shows no activity against CDK1/2/5, EGFR, FGFR, PDGFR, InsR, etc. Phase 3.

Features:The 1st specific inhibitor for CDK4/6 to show promise in multiple cancers.

Dinaciclib (SCH727965)

Dinaciclib (SCH727965, PS-095760) is a novel and potent CDK inhibitor for CDK2, CDK5, CDK1 and CDK9 with IC50 of 1 nM, 1 nM, 3 nM and 4 nM in cell-free assays, respectively. It also blocks thymidine (dThd) DNA incorporation. Dinaciclib induces apoptosis through the activation of caspases 8 and 9. Phase 3.

Flavopiridol HCl

Flavopiridol HCl (NSC 649890 HCl, alvocidib, L86-8275, HMR-1275, DSP-2033) competes with ATP to inhibit CDKs including CDK1, CDK2, CDK4 and CDK6 with IC50 of ~ 40 nM in cell-free assays. It is 7.5-fold more selective for CDK1/2/4/6 than CDK7. Flavopiridol is initially found to inhibit EGFR and PKA. Flavopiridol HCl induces autophagy and ER stress. Flavopiridol HCl blocks HIV-1 replication. Phase 1/2.

Roscovitine (Seliciclib)

Roscovitine (Seliciclib, CYC202) is a potent and selective CDK inhibitor for Cdc2, CDK2 and CDK5 with IC50 of 0.65 μM, 0.7 μM and 0.16 μM in cell-free assays. It shows little effect on CDK4/6. Phase 2.

Ribociclib (LEE011)

Ribociclib (LEE011) is an orally available, and highly specific inhibitor of CDK4 and CDK6 with IC50 of 10 nM and 39 nM. Phase 3.

SNS-032 (BMS-387032)

SNS-032 (BMS-387032) has firstly been described as a selective inhibitor of CDK2 with IC50 of 48 nM in cell-free assays and is 10- and 20-fold selective over CDK1/CDK4. It is also found to be sensitive to CDK7/9 with IC50 of 62 nM/4 nM, with little effect on CDK6. SNS-032 (BMS-387032) induces apoptosis. Phase 1.