MEK inhibitor-1

GDC-0623 (RG 7421) is a potent, ATP-uncompetitive MEK1 inhibitor with a Ki of 0.13 nM, currently in Phase 1.

MEK4 inhibitor-1 is a newly developed compound specifically designed to inhibit the activity of MEK4, a key enzyme involved in pancreatic adenocarcinoma, with an IC 50 value of 61 nM.

GDC-0425 (RG-7602) is a potent and highly selective inhibitor of Checkpoint kinase 1 (Chk1). This product blocks DNA damage-induced cell cycle arrest by inhibiting Chk1 activity, forcing damaged cells into mitosis and ultimately leading to apoptosis. Research indicates that the activity of GDC-0425 is modulated by the Ras-MEK signaling pathway, and it significantly enhances tumor regression when combined with DNA-damaging agents like Gemcitabine.

LLS30 is an allosteric inhibitor of Galectin-1 (Gal-1). LLS30 inhibits the downstream MEK/ERK signaling pathway and also inhibits Akt phosphorylation. LLS30 exhibits potent proliferation-inhibitory activity against various prostate cancer cell lines.

MEK-IN-1 is a MEK inhibitor that serves as a chemical compound used in biological research to inhibit the activity of MEK enzymes.

MEK/RAF-IN-1 (Compound 16b) serves as an inhibitor targeting both MEK and RAF, demonstrating potent efficacy with IC 50 values reported at 28 nM for MEK1, and 3 nM for both BRAF and BRAFV600E. This compound exhibits significant antitumor capabilities, effectively curbing cell proliferation in vitro in MIA PaCa-2 (G12C KRAS), HCT116 (G13D KRAS), and C26 (G12D KRAS) cells. Furthermore, MEK/RAF-IN-1 significantly restricts tumor growth in xenograft mouse models employed in the study of colorectal cancer.

Atebimetinib (IMM-1-104) is an orally active, deeply periodic MEK inhibitor that directly targets MEK and chronically suppresses MAPK signaling. It is intended for combination therapy in metastatic pancreatic cancer and non-small cell lung cancer (NSCLC).

XSJ-10 is an HDAC inhibitor containing a RAS/RAF protein interference unit, with IC50 values of 0.05 μM in PANC-1 cells and 0.04 μM in HT-29 cells. It effectively induces cancer cell apoptosis and tumor inhibition by strongly suppressing the RAS-RAF-MEK-ERK signaling pathway and HDAC3 acetylation levels.

HDB-1 is a selective inhibitor of the P2Y14 receptor (P2Y14R) with an IC50 of 26 pM. HDB-1 shows no significant inhibition on P2Y1R, P2Y2R, P2Y4R, P2Y6R, and P2Y12R. HDB-1 blocks the activation of hepatic stellate cells (HSC) by inhibiting the PKA/Raf1/MEK/ERK signaling pathway mediated by P2Y14R, thereby alleviating the core pathological process of liver fibrosis. HDB-1 is used in liver fibrosis research models to investigate purinergic receptor signaling specificity, hepatic stellate cell activation pathways, and downstream MAPK pathway modulation in fibrogenesis-related cellular systems.

U0126, an effective and selective non-competitive inhibitor of MAP kinase, inhibits MEK-1 and MEK-2 with IC50 values of 0.07 and 0.06 μM respectively. U0126 inhibits autophagy and mitophagy.

PD184161 is a novel, orally-active MEK inhibitor. PD184161 inhibited MEK activity (IC50 = 10-100 nM) in a time- and concentration-dependent manner[1].

GIT1-IN-1 is an inhibitor of ARF GTPase-activating protein 1 (GIT1), with a KD value of 6.2 μM. It induces apoptosis (cell death) in liver cancer and colon cancer cells, halts the cell cycle in the G2/M phase, and suppresses cell proliferation, colony formation, and migration. Furthermore, GIT1-IN-1 can inhibit the activity of MEK and ERK in liver and colon cancer cells, reduce cyclin D1 expression, and stabilize cyclin B1 protein. This compound is applicable for research in liver and colon cancer.

Pelitinib (EKB-569) (EKB-569) is an effective irreversible EGFR inhibitor (IC50: 38.5 nM).

Inactive analog of U0126(MEK-1/2 inhibitor), used as a negative control

BMS-599626 (AC480) has been used in trials studying the treatment of Cancer, Metastases, and HER2 or EGFR Expressing Advanced Solid Malignancies.

SL327 is a selective inhibitor for MEK1/2 with IC50 of 0.18 μM/0.22 μM; able to transport through the blood-brain barrier.

Hederacolchiside A1 (Raddeanoside R13) shows anti-leishmanial activity, it exhibits a strong antiproliferative activity on all stages of development of the parasite by altering membrane integrity and potential. Hederacolchiside A1 shows antiproliferation activities in three cancer cell lines with the IC50 value of 2.4 uM, it exhibits a preferential cytotoxicity on a pigmented melanoma cell line. It suppresses proliferation of tumor cells by inducing apoptosis through modulating PI3K/Akt/mTOR signaling pathway.

Tpl2 kinase inhibitor is an inhibitor of tumor progression locus 2 (Tpl2; IC50= 0.05 μM).1It is selective for Tpl2 over MEK, p38 MAPK, Src, MK2, and PKC (IC50s = >40, 180, >400, 110, and >400 μM, respectively). Tpl2 kinase inhibitor inhibits LPS-induced TNF-α production in isolated human monocytes and whole blood (IC50s = 0.7 and 8.5 μM, respectively). It enhances differentiation induced by calcitriol in HL-60 and U937 leukemia cells when used at a concentration of 5 μM.2Tpl2 kinase inhibitor (5 μM) inhibits the proliferation of KG-1a leukemia cells.3 1.Garvin, L.K., Green, N., Hu, Y., et al.Inhibition of Tpl2 kinase and TNF-α production with 1,7-naphthyridine-3-carbonitriles: Synthesis and structure-activity relationshipsBioor. Med. Chem. Lett.15(23)5288-5292(2005) 2.Wang, X., and Studzinski, G.P.Expression of MAP3 kinase COT1 is up-regulated by 1,25-dihydroxyvitamin D3 in parallel with activated c-jun during differentiation of human myeloid leukemia cellsJ. Steroid. Biochem. Mol. Biol.121(1-2)395-398(2010) 3.Wang, X., Gocek, E., Novik, V., et al.Inhibition of Cot1/Tlp2 oncogene in AML cells reduces ERK5 activation and up-regulates p27Kip1 concomitant with enhancement of differentiation and cell cycle arrest induced by silibinin and 1,25-dihydroxyvitamin D3Cell Cycle9(22)4542-4551(2010)

AZD8330 (ARRY-704) is a novel, selective, non-ATP competitive MEK 1/2 inhibitor with IC50 of 7 nM. Phase 1.

iMDK quarterhydrate, a potent PI3K inhibitor, is effective in inhibiting the growth factor MDK (also known as midkine or MK) while demonstrating suppression of non-small cell lung cancer (NSCLC). In combination with a MEK inhibitor, iMDK quarterhydrate demonstrates cooperative inhibition of NSCLC without causing harm to normal cells and mice [1].

Hymenialdisine Analogue #1 is the indole derivative of Hymenialdisine, a potent inhibitor of a variety of kinases including MEK-1, GSK-3Β, and CKI. It also exhibits inhibition of the G2 cell cycle checkpoint at the micromolar concentrations.

RO5126766 (CH5126766) is a dual RAF/MEK inhibitor with IC50 of 8.2 nM, 19 nM, 56 nM, and 160 nM for BRAF V600E, BRAF, CRAF, and MEK1, respectively. Phase 1.

(2Z,3Z)-U0126 is a highly selective inhibitor of both MEK1 and MEK2, a type of MAPK/ERK kinase. It was found to functionally antagonize AP-1 transcriptional activity via noncompetitive inhibition of the dual specificity kinase MEK with IC50 of 72 nM for MEK1 and 58 nM for MEK2. U0126 inhibited anchorage-independent growth of Ki-ras-transformed rat fibroblasts by simultaneously blocking both extracellular signal-regulated kinase and mammalian target of rapamycin pathways.

GSK1790627, the N-deacetylated metabolite of Trametinib, represents an orally active MEK inhibitor that promotes autophagy and triggers apoptosis [1].