CDK2 Inhibitor

Abemaciclib (LY2835219) is a selective and BBB-permeable CDK4/6 inhibitor with IC₅₀ values of 2 nM and 10 nM for CDK4 and CDK6, respectively.

Ro-3306 is a potent and selective inhibitor of CDK1, with K_is of 20 nM, 35 nM and 340 nM for CDK1, CDK1/cyclin B1 and CDK2/cyclin E, respectively.

Dinaciclib (SCH 727965) is a potent inhibitor of CDK, with IC₅₀s of 1 nM, 1 nM, 3 nM, and 4 nM for CDK2, CDK5, CDK1, and CDK9, respectively.

Flavopiridol (Alvocidib) is a broad spectrum and competitive inhibitor of CDKs, inhibiting CDK1, CDK2, CDK4 with IC₅₀s of 30, 170, 100 nM, respectively.

(R)-Roscovitine (Seliciclib) is an orally bioavailable, selective and BBB-permeable CDKs inhibitor with IC₅₀s of 0.2 μM, 0.65 μM, and 0.7 μM for CDK5, Cdc2, and CDK2, respectively.

ZnPc-PEG2-VH032 is a VHL-pathway-dependent photodegradation targeting chimera (PDTAC) and cytotoxic agent. ZnPc-PEG2-VH032 (HY-120217) binds to the VHL ligand domain, and then specifically degrades VHL under light irradiation, a process independent of non-specific ROS-mediated protein damage. ZnPc-PEG2-VH032 uses Zinc phthalocyanine (HY-19204) as a photosensitizer, and generates ROS via type I and type II photodynamic pathways under 680 nm LED irradiation. On one hand, it targets and degrades the bound VHL protein through ROS; on the other hand, it exerts direct photodynamic cytotoxicity. Meanwhile, the degradation of VHL downregulates the phosphorylation level of CDK2/4, induces cell cycle arrest in tumor cells, further enhances the sensitivity of tumor cells to oxidative damage caused by ROS, and achieves a synergistic anti-tumor effect. ZnPc-PEG2-VH032 exerts significant in vivo efficacy in an orthotopic mouse model of non-muscle invasive bladder cancer (NMIBC).

PF-07104091 hydrate is a potent and selective CDK2/cyclin E₁ and GSK3β inhibitor, with K_is of 1.16 and 537.81 nM, respectively. PF-07104091 hydrate has anti-tumor activity for cyclin E₁-amplified cancers. (patent WO2020157652A2).

Abemaciclib methanesulfonate (LY2835219 methanesulfonate) is a selective and BBB-permeable CDK4/6 inhibitor with IC₅₀s of 2 nM and 10 nM for CDK4 and CDK6, respectively.

SNS-032 (BMS-387032) is a potent and selective inhibitor of CDK2, CDK7, and CDK9 with IC₅₀s of 38 nM, 62 nM and 4 nM, respectively. SNS-032 has antitumor effect.

SY-5609 (CDK7-IN-3) is an orally active, highly selective, noncovalent CDK7 inhibitor with a K_D of 0.065 nM. SY-5609 shows poor inhibition on CDK2 (K_i=2600 nM), CDK9 (K_i=960 nM), CDK12 (K_i=870 nM). SY-5609 induces apoptosis in tumor cells and has antitumor activity.

hSMG-1 inhibitor 11j, a pyrimidine derivative, is a potent and selective inhibitor of hSMG-1, with an IC₅₀ of 0.11 nM. hSMG-1 inhibitor 11j exhibits >455-fold selectivity for hSMG-1 over mTOR (IC₅₀=50 nM), PI3Kα/γ (IC₅₀=92/60 nM) and CDK1/CDK2 (IC₅₀=32/7.1 μM). hSMG-1 inhibitor 11j can be used for the research of cancer.

Kenpaullone is a potent inhibitor of CDK1/cyclin B and GSK-3β, with IC₅₀s of 0.4 μM and 23 nM, and also inhibits CDK2/cyclin A, CDK2/cyclin E, and CDK5/p25 with IC₅₀s of 0.68 μM, 7.5 μM, 0.85 μM, respectively. Kenpaullone, a small molecule inhibitor of KLF4, reduces self-renewal of breast cancer stem cells and cell motility in vitro.

GSK 3 Inhibitor IX (6-Bromoindirubin-3'-oxime; BIO) is a potent, selective, reversible and ATP-competitive inhibitor of GSK-3α/β and CDK1-cyclinB complex with IC₅₀s of 5 nM/320 nM/80 nM for (GSK-3α/β)/CDK1/CDK5, respectively.

Samuraciclib hydrochloride (CT7001 hydrochloride) is a potent, selective, ATP-competitive and orally active CDK7 inhibitor, with an IC₅₀ of 41 nM. Samuraciclib hydrochloride displays 45-, 15-, 230- and 30-fold selectivity over CDK1, CDK2 (IC₅₀ of 578 nM), CDK5 and CDK9, respectively. Samuraciclib hydrochloride inhibits the growth of breast cancer cell lines with GI₅₀ values between 0.2-0.3 µM. Samuraciclib hydrochloride has anti-tumor effects.

Toyocamycin (Vengicide) is an adenosine analog produced by Streptomyces diastatochromogenes, acts as an XBP1 inhibitor. Toyocamycin blocks RNA synthesis and ribosome function, and induces apoptosis. Toyocamycin affects IRE1α-XBP1 pathway, and inhibits XBP1 mRNA cleavage with an IC₅₀ value of 80 nM with affecting IRE1α auto-phosphorylation. Toyocamycin specifically inhibits CDK9 with an IC₅₀ value of 79 nM.

Amantadine (1-Adamantanamine) is an orally avtive and potent antiviral agent with activity against influenza A viruses. Amantadine inhibits several ion channels such as NMDA and M2, and also inhibits Coronavirus ion channels. Amantadine also has anti-orthopoxvirus and anticancer activity. Amantadine can be used for Parkinson's disease, postoperative cognitive dysfunction (POCD) and COVID-19 research.

YKL-5-124 is a potent, selective, irreversible and covalent CDK7 inhibitor with IC₅₀s of 53.5 nM and 9.7 nM for CDK7 and CDK7/Mat1/CycH, respectively. YKL-5-124 is >100-fold greater selective for CDK7 than CDK9 and CDK2, and inactive against CDK12 and CDK13. YKL-5-124 induces a strong cell-cycle arrest, inhibits E2F-driven gene expression, and exhibits little effect on RNA polymerase II phosphorylation status.

Tambiciclib (GFH009, JSH-009) is an orally active, highly potent and selective CDK9 inhibitor (IC₅₀ = 1 nM), demonstrating >200-fold selectivity over other CDKs, >100-fold selectivity over DYRK1A/B, and excellent selectivity over 468 kinases/mutants. Tambiciclib demonstrates potent in vitro and in vivo antileukemic efficacy in acute myeloid leukemia (AML) mouse models by inhibiting RNA Pol II phosphorylation, downregulating MCL1 and MYC, and inducing apoptosis. Tambiciclib can be used for AML research.

AT7519 (AT7519M) as a potent inhibitor of CDKs, with IC₅₀s of 210, 47, 100, 13, 170, and <10 nM for CDK1, CDK2, CDK4 to CDK6, and CDK9, respectively.

CPS2 is a first-in-class, highly potent, selective and irreversible PROTAC CDK2 degrader (IC₅₀= 24 nM). CPS2 can be used for the research of acute myeloid leukemia.