Dinaciclib (SCH727965)

Selective CDK Inhibitor

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

Selective CDK Inhibitor

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

Most Potent CDK Inhibitor

LY2835219 : CDK4, IC50=2 nM; CDK6, IC50=10 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.

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.

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, R-roscovitine) 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.

Abemaciclib mesylate (LY2835219)

Abemaciclib (LY2835219) is a potent and selective inhibitor of CDK4 and CDK6 with IC50 of 2 nM and 10 nM in cell-free assays, respectively. Phase 3.

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.