DYRK Inhibitor

Leucettinib-92 (compound 92) is an inhibitor of DYRK/CLK kinase, The IC₅₀s are 147 nM (CLK1), 39 nM (CLK2), 5.2 nM (CLK4), 0.8 μM (CLK3), 124 nM (DYRK1A), 204 nM (DYRK1B), 0.16 μM (DYRK2), respectively. 1.0 μM (DYRK3), 0.52 μM (DYRK4), 2.78 μM (GSK3).

Dyrk1A-IN-5 (Compound 5j) is a potent and selective DYRK1A inhibitor, with an IC₅₀ of 6 nM. yrk1A-IN-5 exhibits significant selectivity for DYRK1B (IC₅₀ = 600 nM) and CLK1 (IC₅₀ = 500 nM), but shows almost no inhibition of DYRK2 (IC₅₀ > 10 μM). Dyrk1A-IN-5 can be used for Down syndrome research.

ARN25068 is a sub-micromolar inhibitor of the three protein kinases, GSK-3β, FYN and DYRK1A to tackle tau hyperphosphorylation.

AZ-Dyrk1B-33 is a potent and selective Dyrk1B kinase inhibitor, with an IC₅₀ of 7 nM.

CK2/ERK8-IN-1 is a dual casein kinase 2 (CK2) (K_i of 0.25 µM) and ERK8 (MAPK15, ERK7) inhibitor with IC₅₀s of 0.50 μM. CK2/ERK8-IN-1 also binds to PIM1, HIPK2 (homeodomain-interacting protein kinase 2), and DYRK1A with K_is of 8.65 µM, 15.25 µM, and 11.9 µM, respectively. CK2/ERK8-IN-1 has pro-apoptotic efficacy.

YK-2-69 is a highly selective DYRK2 inhibitor with an IC₅₀ value of 9 nM. YK-2-69 specifically interacts with Lys-231 and Lys-234 of DYRK2 and can be utilized in researches related to prostate cancer.

Dyrk1A-IN-3 (Compound 8b), a highly selective dual-specificity tyrosine-regulated kinase 1A (DYRK1A) inhibitor, maintains high levels of DYRK1A binding affinity (IC₅₀=76 nM). Dyrk1A-IN-3 can be used for the research of neurodegenerative disorders such as Alzheimer’s Disease, Huntington’s Disease, and Parkinson’s Disease.

Dyrk1A-IN-4 is a potent and orally active Dyrk1A inhibitor. Dyrk1A-IN-4 exhibits IC₅₀s against DYRK1A and DYRK2 of 2 nM and 6 nM. Dyrk1A-IN-4 exhibits the inhibition of the DYRK1A pSer520 autophosphorylation in U2OS cells with an IC₅₀ of 28 nM. Dyrk1A-IN-4 can be used for the studies of ovarian adenocarcinoma, neuroblastoma and cervical squamous cell carcinoma.

MU1210 (compound 12f), a chemical probe, is an inhibitor of CDC-like kinases Clk1, Clk2, and Clk4 (with IC₅₀ values of 8, 20, and 12 nM respectively), with IC₅₀ for HIPK1 and DYRK2 are 187 and 1309 nM. MU1210 also has favorable pharmacokinetic characteristics (in mice, 10 mg/kg, intraperitoneal injection: C_max=1.24 μM, T_1/2=58 minutes; no acute toxicity observed).

EHT 5372 is a highly potent and selective inhibitor of DYRK's family kinases with IC₅₀s of 0.22, 0.28, 10.8, 93.2, 22.8, 88.8, 59.0, 7.44, and 221 nM for DYRK1A, DYRK1B, DYRK2, DYRK3, CLK1, CLK2, CLK4, GSK-3α, and GSK-3β, respectively.

7-Deazaguanine (Compound 1) is a highly selective, well-tolerated, brain-penetrant DYRK1A inhibitor. 7-Deazaguanine is promising for research of cancers and Down’s syndrome.

CLK1-IN-3 (compound 10ad) is a potent and selective Clk1 inhibitor, with an IC₅₀ of 5 nM and over 300-fold selectivity for Dyrk1A. CLK1-IN-3 also shows a relatively potent inhibition against Clk2 and Clk4, with IC₅₀ values of 42 and 108 nM, respectively. CLK1-IN-3 potently induces autophagy in vitro. CLK1-IN-3 can be used for acute liver injury (ALI) research.

ON 108600 (108600) is a CK2 (CK2α1: IC₅₀ = 50 nM; CK2α2 = 5 nM), TNIK (IC₅₀ = 5 nM) and DYRK (DYRK1A: IC₅₀ = 16 nM; DYRK1B = 7 nM; DYRK2: = 28 nM). ON 108600 suppresses the growth of CD44high/CD24low breast cancer stem cell (BCSC) populations, induces G2/M arrest and apoptosis in triple negative breast cancer (TNBC) cells, and inhibits tubulin polymerization. ON 108600 can be used for the study of chemotherapy-resistant and metastatic TNBC.

LDN-192960 is an inhibitor of Haspin and Dual-specificity Tyrosine-regulated Kinase 2 (DYRK2) with IC₅₀s of 10 nM and 48 nM, respectively.

BT173 is a potent homeodomain interacting protein kinase 2 (HIPK2) inhibitor. BT173 binds to HIPK2 and does not inhibit HIPK2 kinase activity but rather, interfered allosterically with the ability of HIPK2 to associate with Smad3. BT173 attenuates renal fibrosis through suppression of the TGF-β1/Smad3 pathway. BT173 can be studied in research for kidney diseases such as renal fibrosis.

GNF2133 hydrochloride is a potent, selective and orally active DYRK1A inhibitor with IC₅₀s of 0.0062, >50 µM for DYRK1A and GSK3β, respectively. GNF2133 hydrochloride shows good proliferation potency and efficacy on rat and human primary β-cell. GNF2133 hydrochloride significantly improves glucose disposal capacity and increases insulin secretion. GNF2133 hydrochloride has the potential for the research of type 1 diabetes.

LDN-192960 hydrochloride is an inhibitor of Haspin and Dual-specificity Tyrosine-regulated Kinase 2 (DYRK2) with IC₅₀s of 10 nM and 48 nM, respectively.

HTH-01-091 is a potent and selective maternal embryonic leucine zipper kinase (MELK) inhibitor, with an IC₅₀ of 10.5 nM. HTH-01-091 also inhibits PIM1/2/3, RIPK2, DYRK3, smMLCK and CLK2. HTH-01-091 can be uesd for breast cancer research.

DYRKs-IN-1 hydrochloride is a potent DYRKs (Dual-specificity tyrosine-phosphorylation-regulated kinases) inhibitor with IC₅₀s of 5 nM and 8 nM for DYRK1A and DYRK1B, respectively. DYRKs-IN-1 hydrochloride has antitumor activity.

LDN-209929 dihydrochloride is a potent and selective haspin kinase inhibitor (IC₅₀=55 nM) with180-fold selectivity verses DYRK2 (IC₅₀=9.9 μM). LDN-209929 is a optimized analogue of LDN-192960 (HY-13455).