Polo-like Kinase (PLK) Inhibitor

dTAG Targeting Ligand 1 (SUBSTITUTE SHEET 245) is a PROTAC target protein ligand (Ligand for Target Protein for PROTAC). dTAG Targeting Ligand 1 can be used for synthesis PROTACs.

Scytonemin is a hydrophobic alkaloid pigment that can be isolated from the outer sheath of cyanobacteria. Scytonemin has protective function against short-wave solar ultraviolet (UV) radiation, which can reduce the generation of reactive oxygen species (ROS) and the formation of DNA damage. Scytonemin also has anti-inflammatory and anti-proliferative activities, produces concentration-dependent inhibition (IC₅₀=2.0 μM) of polo-like kinase 1 (PLK1)-mediated cdc25C phosphorylation, and plays an important role in regulating the G2/M transition in the cell cycle. It can be used in the research of cancer, acute inflammation and sunscreen cosmetics.

3MB-PP1, a bulky purine analog, is a Polo-like kinase 1 (Plk1) inhibitor. 3MB-PP1 blocks mitotic progression and cell division arise through target Plk1 in in cells expressing analog-sensitive Plk1 alleles. 3MB-PP1 specifically inhibits the activity of analog-sensitive Ssn3 (Cdk8). 3MB-PP1 inhibits Leu93 Mutant Zipper-interacting protein kinase (Leu93-ZIPK; IC₅₀=2 μM). 3MB-PP1 can be used for the research of hypha formation of Candida albicans and cell division.

TC-S 7005 is a Polo-like kinases (Plks) inhibitor with IC₅₀s of 4 nM, 24 nM and 214 nM for Plk2, Plk3, and Plk1, respectively.

Poloxin is a non-ATP competitive Polo-like Kinase 1 (PLK1) inhibitor that targets the polo-box domain, with an IC₅₀ of appr 4.8 μM.

Telocinobufagin (Telobufotoxin; Telocinobufogenin) is an orally active bufadienolide with potential anti-tumor effects. Telocinobufagin exerts its anti-cancer effects on non-small cell carcinoma, osteosarcoma, thyroid cancer, breast cancer and head and neck squamous cell carcinoma by inhibiting the STAT3, JAK2/STAT3, LARP1-mTOR, PI3K/Akt/Snail and PLK1 pathways, and can also induce tumor cell apoptosis. Telocinobufagin enhances the Th1 immune response and protects against Salmonella typhimurium infection. Telocinobufagin has a strong cardiac-stimulating effect by inhibiting the activity of Na⁺/K⁺-ATPase, and it can promote renal fibrosis. Telocinobufagin demonstrates non-opioid analgesic effects in various acute pain models.

RP-1664 is a selective and orally active PLK4 inhibitor with an IC₅₀ of 3 nM. RP-1664 demonstrates exquisite selectivity over related kinases, including AURKA/B and PLK1. RP-1664 disrupts centriole biogenesis in cancer cells and leads an accumulation of PLK4 and p21 protein. RP-1664 demonstrates increased sensitivity in TRIM37-high-expressing cells or tumors. RP-1664 exhibits anti-tumor activity in breast cancer and neuroblastoma research^[1][2].

KHS101 is a blood-brain barrier-penetrant anticancer agent that primarily functions by inhibiting HSPD1 (IC₅₀ = 14.4 μM) and TACC3 across different cellular backgrounds. KHS101 promotes the aggregation of HSPD1 with client proteins, destabilizes TACC3, and reduces the levels of TACC3, Aurora A and PLK1. KHS101 induces autophagy, apoptosis, cell cycle exit and neuronal differentiation; it suppresses cancer cell growth, motility, EMT and stemness; it also impairs mitochondrial bioenergetics and glycolysis in glioblastoma cells. KHS101 can be used in research related to glioblastoma multiforme and breast cancer.

BI2536-PEG2-Halo is a bifunctional molecule containing a ligand for Halo tag and a Polo-like kinase 1 (PLK1) inhibitor BI-2536 (HY-50698). BI2536-PEG2-Halo inhibits the proliferation of 293T cells with Halo-p53R273H(FL)-mCherry tag (IC₅₀=23 nM), exhibits selective toxicity against p53 mutant cancer cells.

Plogosertib (CYC140) is a selective, potent, and orally active ATP-competitive PLK1 inhibitor (IC₅₀: 3 nM). Plogosertib is an anti-cancer agent with anti-proliferative activity. Plogosertib can be used in the research of several tumors, including esophageal, gastric, leukemia, non–small cell lung cancer, ovarian, and squamous cell cancers.

SBE13 Hydrochloride is a potent and selective Plk1 inhibitor, with an IC₅₀ of 200 pM; SBE13 Hydrochloride poorly inhibits Plk2 (IC₅₀>66 μM) or Plk3 (IC₅₀=875 nM).

HMN-176 is a stilbene derivative which inhibits mitosis, interfering with polo-like kinase-1 (plk1), without significant effect on tubulin polymerization.

PLK1/BRD4-IN-5 (Compound SC10) is an orally active PLK1 and BRD4 inhibitor with IC₅₀ values of 0.3  nM and 60.8  nM, respectively. PLK1/BRD4-IN-5 can induce MV4-11 cell block in S phase and apoptosis) in a dose-dependent manner. PLK1/BRD4-IN-5 can be used in cancer research.

PLK4-IN-4 (compound 22) is a potent PLK4 inhibitor with an IC₅₀ value of 7.9 nM. PLK4-IN-4 has the potential for the research of cancer.

Aurora kinase-IN-3 (Compound 15a) is an orally active AURKB inhibitor that elicits an AURKB-suppressive activity by disrupting the mitotic localization of AURKB, rather than inhibiting its phosphorylation of H3 at Ser10.

LFM-A13 is a potent BTK, JAK2, PLK inhibitor, inhibits recombinant BTK, Plx1 and PLK3 with IC₅₀s of 2.5 μM, 10 μM and 61 μM; LFM-A13 shows no effects on JAK1 and JAK3, Src family kinase HCK, EGFR and IRK.

PMV6-PEG4-BI2536 is an RIPTAC-like bifunctional molecule that promotes the formation of the p53^Y220C-PLK1 ternary complex (EC₅₀ = 1.4 μM). PMV6-PEG4-BI2536 causes PLK1 mislocalization and inhibits PLK1 activity, inducing G2/M phase arrest and apoptosis in p53^Y220C-mutant cells, while sparing cells with wild-type TP53. PMV6-PEG4-BI2536 can be used in research on uterine, gastric, pancreatic, prostate, and breast cancers harboring the p53^Y220C mutation. PMV6-PEG4-BI2536 is composed of PMV6 (a p53^Y220C mutant-binding ligand), PEG4 (a linker), and BI2536 (HY-159493) (a PLK inhibitor).

Volasertib (BI 6727) trihydrochloride is an orally active, highly potent and ATP-competitive Polo-like kinase 1 (PLK1) inhibitor with an IC₅₀ of 0.87 nM. Volasertib trihydrochloride inhibits PLK2 and PLK3 with IC₅₀s of 5 and 56 nM, respectively. Volasertib trihydrochloride induces mitotic arrest and apoptosis. Volasertib trihydrochloride, a dihydropteridinone derivative, shows marked antitumor activity in multiple cancer models.

AAPK-25 is a potent and selective Aurora/PLK dual inhibitor with anti-tumor activity, which can cause mitotic delay and arrest cells in a prometaphase, reflecting by the biomarker histone H3^Ser10 phosphorylation and followed by a surge in apoptosis. AAPK-25 targets Aurora-A, -B, and -C with K_d values ranging from 23-289 nM, as well as PLK-1, -2, and -3 with K_d values ranging from 55-456 nM.

LFM-A13 is a potent BTK, JAK2, PLK inhibitor, inhibits recombinant BTK, Plx1 and PLK3 with IC₅₀s of 2.5 μM, 10 μM and 61 μM. LFM-A13 has antiproliferative activity and anticancer activity. LFM-A13 can be used in cancer-related research