FLT3-ITD

FLT3-ITD/D835Y-IN-1 (Compound 1) is an inhibitor of FLT3-ITD and BCR-ABL. It induces pro-apoptotic (apoptosis) effects by inhibiting the FLT3 and BCR-ABL pathways, along with potentially other targets. This compound is applicable in acute myeloid leukemia (AML) research.

FLT3-ITD-IN-2 (Compound A1) is an inhibitor of the FLT3-ITD kinase, exhibiting an IC50 of 2.12 nM. It effectively suppresses the proliferation of the FLT3-dependent human AML cell line MOLM-13, with an IC50 of 25.65 nM. FLT3-ITD-IN-2 demonstrates antitumor activity against acute myeloid leukemia.

FLT3-ITD-IN-3 (13v) is an orally active inhibitor of FLT3-ITD (internal tandem duplication of FLT3), which works by blocking FLT3 signaling. This inhibition leads to cell cycle arrest in the G0/G1 phase and induces apoptosis. The compound is currently employed in studies related to acute myeloid leukemia (AML).

PDGFRα/FLT3-ITD-IN-3 (Compound 18d) is a potent inhibitor of PDGFRα (IC50: 0.153 μM) and FLT3 (IC50: 0.004 μM), with potential applications in the study of acute myeloid leukaemia or chronic eosinophilic leukaemia.

PDGFRα/FLT3-ITD-IN-1 are potent inhibitors of PDGFRα/FLT3, and their IC50 values are greater than 0.036 and 0.003 μM, respectively. PDGFRα/FLT3-ITD-IN-1 exhibits investigational potential in acute myeloid leukemia or chronic eosinophilic leukemia.

PDGFRα/FLT3-ITD-IN-2 is a potent inhibitor of PDGFRα (IC50>20 μM) and FLT3 (IC50: 0.004 μM). PDGFRα/FLT3-ITD-IN-2 has shown investigational potential in acute myeloid leukemia or chronic eosinophilic leukemia.

Quizartinib (AC220) is an inhibitor of FLT3 (Kd: 1.6 nM) and demonstrates high selectivity for FLT3 when tested against a panel of 227 additional kinases.

BSc5371 is a potent and irreversible FLT3 inhibitor (Kds: 1.3, 0.83, 1.5, 5.8, and 2.3 nM for mutant FLT3 D835H, FLT3 ITD/D835V, FLT3 ITD/F691L, FLT3-ITD, and wild type FLT3 wt).

FLT3-IN-6 is a potent and selective inhibitor of FLT3-ITD [FLT3 mutation], with an IC50 of 1.336 nM.

Tandutinib (CT53518) (MLN518, CT53518), an effective FLT3 antagonist (IC50: 0.22 μM), can also inhibit c-Kit and PDGFR, 15-20 fold higher potency for FLT3 versus CSF-1R and >100-fold selectivity for the same target versus FGFR, EGFR, and KDR.

Itacnosertib (TP-0184) is an orally available ACRV1 (ALK-2), FLT3 and JAK2 inhibitor that inhibits the growth of tumor cells overexpressing ALK-2, overcomes FLT3 inhibitor resistance and synergistically inhibits AML growth with venetoclax, and possesses potential antitumor and antileukemic activity.

FLT3/ITD-IN-1 (Compound 1) is a highly potent inhibitor of FLT3 internal tandem duplications (FLT3-ITD) with IC50 values of 38.2 nM for FLT3 and 144.1 nM for FLT3-ITD, and shows exceptional antiproliferative activities against several acute myeloid leukemia cell lines [1].

FLT3/ITD-IN-3 (Compound 19) is a potent inhibitor of FLT3-ITD, demonstrating efficacy against FLT3D835Y (IC50: 0.3 nM), FLT3 (IC50: 0.4 nM), and FLT3-ITD (IC50: 0.9 nM). It significantly inhibits FLT3 phosphorylation and effectively suppresses the proliferation of AML cells.

FLT3/ITD-IN-4 (Compound 16) is a selective inhibitor of FLT3 internal tandem repeat mutations (FLT3-ITD) with an IC50 of 2.3 nM and is applicable for studying acute myeloid leukemia.

FLT3/ITD-IN-2 is a potent inhibitor of FLT3-ITD and is able to act on FLT3D835Y (IC50: 0.3 nM), FLT3 (IC50: 0.4 nM) and FLT3-ITD (IC50: 1.0 nM).FLT3/ITD-IN-2 effectively inhibits the phosphorylation of FLT3 and is able to effectively inhibit the proliferation of acute myeloid leukemia cells.

FLT3/ITD-IN-5 (Example 6) is an orally active inhibitor of both FLT3 and FLT3-ITD, exhibiting IC50 values of 0.088 nM and 0.348 nM, respectively. This compound is utilized in cancer research.

LY2457546 is a highly potent, orally bioavailable multi-target anti-angiogenic tyrosine kinase inhibitor. It shows strong inhibitory activity against multiple targets including VEGFR2, PDGFRβ, FLT-3, Tie-2, and Eph family receptors, and is applied in cancer research such as leukemia.

PROTAC FLT-3 degrader 1 is a PROTAC FLT-3 degrader of internal tandem duplication (ITD) with an IC50 of 0.6 nM and exhibits anti-proliferative activity.

BIX02188 is a selective and potent MEK5 inhibitor that inhibits MEK5-induced apoptosis in cells expressing the oncogenic mutant FLT3-ITD.

SILA-123, an inhibitor of FLT3 (FLT3-WT: IC50=2.1 nM; FLT3-ITD: IC50=1.0 nM), induces cell apoptosis by hindering the cell cycle progression at the G0/G1 phase through the suppression of FLT3 phosphorylation and its downstream signaling pathways. This compound is utilized in the study of acute myeloid leukemia.

FLT3-IN-27 (compound 49) is an inhibitor of FLT3-ITD with an IC50 of 174 nM. It impedes cell growth by causing cell cycle arrest at the G1 phase, making it suitable for research in acute myeloid leukemia.

FLT3-IN-29 (Compound MY-10) is an FLT3 inhibitor with IC50 values of 6.5 nM and 10.3 nM for FLT3-ITD and FLT3-D835Y mutants, respectively. It induces cell cycle arrest at the G0/G1 phase and effectively triggers apoptosis (Apoptosis). Additionally, FLT3-IN-29 reduces reactive oxygen species (ROS) and mitochondrial membrane potential (MMP), displaying anti-leukemic properties.

FLT3-IN-28 (Compound 12y) is an orally active FLT3 inhibitor with antitumor properties. It selectively targets cancer cells with FLT3 internal tandem duplication (ITD) mutations, demonstrating IC50 values of 85, 290, 130, 65, and 220 nM against BaF3-FLT3-ITD, BaF3-TEL-VEGFR2, MV4-11, MOLM-13, and MOLM-14 cell lines, respectively. These lines include acute myeloid leukemia (AML) cells harboring FLT3-ITD mutations such as MV4-11 and MOLM-13/14. The compound also reduces phosphorylation levels of FLT3 and STAT5 in MOLM-13 cells, leading to cell cycle arrest and apoptosis. With an oral bioavailability of 19.2% in SD rats, FLT3-IN-28 extends survival in a dose-dependent manner in MOLM-13 xenografted NSG mouse models. It holds promise for research in FLT3-ITD-related cancer studies.

SKLB4771 (FLT3-IN-1) is a novel potent and selective Flt3 inhibitor.