FLT3 Inhibitor

Sorafenib (Bay 43-9006) is a potent oral active multikinase inhibitor. Sorafenib blocks autophosphorylation and activity of receptor tyrosine kinases (VEGFR-2, VEGFR-3) and RAF family kinases, thereby suppressing the RAF/MEK/ERK and PI3K/Akt pathways, inhibiting STAT3 phosphorylation, and selectively inhibiting the MAPK pathway in cancer cells. Sorafenib induces cell cycle arrest, autophagy, apoptosis, and PARP cleavage, reduces Bcl-2, Bcl-XL, cyclin D1 levels, and activates Bak and Bax. Sorafenib inhibits tumor growth and metastasis in mouse and rat models. Sorafenib can be used for cancer research, such as colon, breast, non-small-cell lung cancer (NSCLC), ovarian, pancreatic, melanoma, colorectal and hepatocellular carcinoma.

Cabozantinib is a potent and orally active inhibitor of VEGFR2 and MET, with IC₅₀ values of 0.035, and 1.3 nM, respectively. Cabozantinib displays strong inhibition of KIT, RET, AXL, TIE2, and FLT3 (IC₅₀=4.6, 5.2, 7, 14.3, and 11.3 nM, respectively). Cabozantinib shows antiangiogenic activity. Cabozantinib disrupts tumor vasculature and promotes tumor and endothelial cell apoptosis.

Gilteritinib (ASP2215) is a potent and ATP-competitive FLT3/AXL inhibitor with IC₅₀s of 0.29 nM/0.73 nM, respectively.

Quizartinib (AC220) is an orally active, potent and selective FLT3 inhibitor. Quizartinib inhibits kinase activity of mutant-FLT3, -PDGFRA and -KIT isoforms and inhibits autophosphorylation. Quizartinib inhibits cellular proliferation, induces apoptosis in cancer cells. Quizartinib can be used for the research of cancer.

R406 is an orally available and competitive Syk/FLT3 inhibitor for ATP binding with a K_i of 30 nM, potently inhibits Syk kinase activity in vitro with an IC₅₀ of 41 nM, measured at an ATP concentration corresponding to its K_m value. R406 reduces immune complex-mediated inflammation. R406 also inhibits Lyn (IC₅₀=63 nM) and Lck (IC₅₀=37 nM).

Enzomenib enantiomer (DSP-5336 enantiomer) is an enantiomer of Enzomenib (HY-156794). Enzomenib (DSP-5336) is an orally active Menin inhibitor (IC₅₀=1.4 nM, K_d=6.0 nM). Enzomenib disrupts the interaction between Menin and KMT2A/MLL fusion proteins, specifically inhibits the expression of leukemia driver genes such as HOX/MEIS1, and upregulates ITGAM. Enzomenib effectively induces cell differentiation, inhibits tumor cell proliferation, and suppresses primitive cell colony formation. Enzomenib reduces disease burden and prolongs survival, but causes adverse reactions including differentiation syndrome and QTc interval prolongation. Enzomenib is used for research on relapsed/refractory acute myeloid leukemia, acute lymphoblastic leukemia, and other hematologic malignancies with mixed lineage leukemia (MLL) rearrangements or NPM1 mutations.

IRAK1/4/pan-FLT3 Kinase-IN-1 hydrochloride is an orally active, potent and selective IRAK/pan-FLT3 kinase inhibitor with IC₅₀s of 5 nM, 0.6 nM and <0.5 nM against IRAK1, IRAK4 and FLT3, respectively. IRAK1/4/pan-FLT3 Kinase-IN-1 hydrochloride can be used for research on AML.

Rebastinib tosylate (DCC-2036 tosylate) is an orally active, non-ATP-competitive Bcr-Abl inhibitor, with IC₅₀ values of 0.8 nM and 4 nM against Abl1^WT and Abl1^T315I, respectively. Rebastinib tosylate potently inhibits CYP2C8 (IC₅₀ = 0.0533 μM) and CYP2C9 (IC₅₀ = 2.54 μM). Rebastinib tosylate allosterically inhibits Tie2 with an IC₅₀ of 0.63 nM. Rebastinib tosylate inhibits the transcriptional activity of FoxO1. Rebastinib tosylate inhibits SRC family kinases, KDR and FLT3 kinases. Rebastinib tosylate induces Apoptosis. Rebastinib tosylate exerts anti-tumor activity in breast cancer. Rebastinib tosylate exerts anti-angiogenic effects. Rebastinib tosylate increases myotube diameter and improves reduced contractility. Rebastinib tosylate can be used in research related to triple-negative breast cancer, luminal breast cancer, pancreatic neuroendocrine tumors, muscle atrophy, cancer cachexia, chronic myeloid leukemia, and B-lymphocytic leukemia.

Fostamatinib (R788) is the oral proagent of the active compound R406. R406 is an orally available and competitive Syk/FLT3 inhibitor with a K_i of 30 nM and an IC₅₀ of 41 nM. R406 also inhibits Lyn (IC₅₀=63 nM) and Lck (IC₅₀=37 nM).

Pacritinib (SB1518) is a potent inhibitor of both wild-type JAK2 (IC₅₀=23 nM) and JAK2^V617F mutant (IC₅₀=19 nM). Pacritinib also inhibits FLT3 (IC₅₀=22 nM) and its mutant FLT3^D835Y (IC₅₀=6 nM).

Crenolanib is a potent and selective inhibitor of wild-type and mutant isoforms of the class III receptor tyrosine kinases FLT3 and PDGFRα/β with K_ds of 0.74 nM and 2.1 nM/3.2 nM, respectively.

Sorafenib (Bay 43-9006) tosylate is a potent oral active multikinase inhibitor. Sorafenib blocks autophosphorylation and activity of receptor tyrosine kinases (VEGFR-2, VEGFR-3) and RAF family kinases, thereby suppressing the RAF/MEK/ERK and PI3K/Akt pathways, inhibiting STAT3 phosphorylation, and selectively inhibiting the MAPK pathway in cancer cells. Sorafenib tosylate induces cell cycle arrest, autophagy, apoptosis, and PARP cleavage, reduces Bcl-2, Bcl-XL, cyclin D1 levels, and activates Bak and Bax. Sorafenib tosylate inhibits tumor growth and metastasis in mouse and rat models. Sorafenib tosylate can be used for cancer research, such as colon, breast, non-small-cell lung cancer (NSCLC), ovarian, pancreatic, melanoma, colorectal and hepatocellular carcinoma.

Rebastinib (DCC-2036) is an orally active, non-ATP-competitive Bcr-Abl inhibitor for Abl1^WT and Abl1^T315I with IC₅₀s of 0.8 nM and 4 nM, respectively. Rebastinib also inhibits SRC, KDR, FLT3, and Tie-2, and has low activity to seen towards c-Kit.

UNC2025 is a potent, ATP-competitive, highly orally active and BBB-permeable Mer/Flt3 inhibitor with IC₅₀ values of 0.74 nM and 0.8 nM, respectively. UNC2025 is >45-fold selectivity for MERTK relative to Axl (IC₅₀= 122 nM; K_i = 13.3 nM). UNC2025 exhibits an excellent PK properties, and can be used for the investigation of acute leukemia.

Ripretinib (DCC-2618) is an orally bioavailable, selective KIT and PDGFRA switch-control inhibitor. Ripretinib (DCC-2618) targets and binds to both wild-type and mutant forms of KIT and PDGFRA specifically at their switch pocket binding sites, thereby preventing the switch from inactive to active conformations of these kinases and inactivating their wild-type and mutant forms. Ripretinib (DCC-2618) also inhibits multiple other kinase targets, such as FLT3 and KDR (or VEGFR-2). DCC-2618 exerts antineoplastic effect and induces apoptosis.

Emavusertib is an orally active inhibitor for IRAK4 (IC₅₀=57 nM) and FLT3. Emavusertib inhibits NF-κB and MyD88 signaling pathways, reduces the generation of pro-inflammatory cytokines like IL-6 and IL-10, thereby exhibiting anti-inflammatory and anti-proliferative activities against cancer cells, leading to cell apoptosis. Emavusertib exhibits antitumor activity in mouse model

Linifanib (ABT-869) is a potent and orally active multi-target inhibitor of VEGFR and PDGFR family with IC₅₀s of 4, 3, 66, and 4 nM for KDR, FLT1, PDGFRβ, and FLT3, respectively. Linifanib shows prominent antitumor activity. Linifanib has much less activity against unrelated RTKs, soluble tyrosine kinases, or serine/threonine kinases. Linifanib is a specific miR-10b inhibitor that blocks miR-10b biogenesis.

Dovitinib (CHIR-258) is an orally active, potent multi-targeted tyrosine kinase (RTK) inhibitor with IC₅₀s of 1, 2, 36, 8/9, 10/13/8, 27/210 nM for FLT3, c-Kit, CSF-1R, FGFR1/FGFR3, VEGFR1/VEGFR2/VEGFR3 and PDGFRα/PDGFRβ, respectively. Dovitinib has potent antitumor activity.

Sorafenib-d₃ (Donafenib), a deuterated compound of Sorafenib, is the first deuterium-generation tumor suppressor small molecule. Sorafenib is a multikinase inhibitor IC₅₀s of 6 nM, 20 nM, and 22 nM for Raf-1, B-Raf, and VEGFR-3, respectively.

KW-2449 is a multi-targeted kinase inhibitor of FLT3, ABL, ABL^T315I and Aurora kinase with IC₅₀s of 6.6, 14, 4 and 48 nM, respectively.