HM43239

HM43239 is an orally active small molecule inhibitor of FLT3 that selectively inhibits not only FLT3 wild type, ITD mutants or TKD mutations, but also FLT3 ITD/TKD double mutations. HM43239 directly inhibits the kinase activity of FLT3 as a reversible Type I inhibitor and effectively modulates downstream p-STAT5 and p-ERK. HM43239 also demonstrated inhibition of SYK, JAK1/2 and TAK1, known to be involved in tumor cell proliferation and/or differentiation HM43239 monotherapy induced dose-dependent regression of tumor growth in FLT3 wild-type and FLT3 mutated leukemia cancer cell line. HM43239 is an orally active and selective FLT3 inhibitor with IC50s of 1.1 nM, 1.8 nM and 1.0 nM for FLT3 WT, FLT3 internal tandem duplication (ITD) and FLT3 D835Y kinases, respectively. HM43239 inhibits the kinase activity of FLT3 as a reversible type I inhibitor and modulates p-STAT5, p-ERK, SYK, JAK1/2, and TAK1. HM43239 inhibits the proliferation and induces the apoptosis of leukemic cells.

Product information

CAS Number: 2569527-64-4

Molecular Weight: 501.07

Formula: C29H33ClN6

Chemical Name: 5-chloro-N-(3-cyclopropyl-5-{[(3R, 5S)-3, 5-dimethylpiperazin-1-yl]methyl}phenyl)-4-(6-methyl-1H-indol-3-yl)pyrimidin-2-amine

Smiles: CC1C=C2NC=C(C2=CC=1)C1=NC(NC2C=C(C=C(CN3C[C@H](C)N[C@H](C)C3)C=2)C2CC2)=NC=C1Cl

InChiKey: FZLSDZZNPXXBBB-KDURUIRLSA-N

InChi: InChI=1S/C29H33ClN6/c1-17-4-7-24-25(12-31-27(24)8-17)28-26(30)13-32-29(35-28)34-23-10-20(9-22(11-23)21-5-6-21)16-36-14-18(2)33-19(3)15-36/h4,7-13,18-19,21,31,33H,5-6,14-16H2,1-3H3,(H,32,34,35)/t18-,19+

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: To be determined

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

HM43239 potently inhibits the growth of acute myeloid leukemia cell lines harboring FLT3 ITD mutation, such as MV4-11 (IC50: 1.3 nM), MOLM-13 (IC50: 5.1 nM), and MOLM-14 (IC50: 2.9 nM). HM43239 also inhibits KG1a cells (CD34+/CD38- cells) proliferation. HM43239 induces the caspase 3/7-dependent apoptosis of leukemic stem cell (LSC) marker-expressing KG1a cells (CD34+/CD38- cells). HM43239 potently inhibits phosphorylation of SYK, STAT3, and STAT5 in KG1a cells.

In Vivo:

HM43239 shows the excellent dose proportional antitumor activity in mouse models xenografted with both MV4-11 and MOLM-13 cell lines without any significant toxicity. HM43239 prolongs survival in FLT3 ITD/TKD double mutated xenograft mouse models.

References:

1. JiSook Kim, et.al. Abstract 1293: HM43239, a novel FLT3 inhibitor in overcoming resistance for acute myeloid leukemia. Cancer Res July 1 2019 (79) (13 Supplement) 1293.
2. Naval G. Daver, et.al. HM43239, a Novel Potent Small Molecule FLT3 Inhibitor, in Acute Myeloid Leukemia (AML) with FMS-like Tyrosine Kinase 3 (FLT3) Mutations: Phase 1 /2 Study. Blood 2019; 134 (Supplement_1): 1331.
3. Miyoung Lee, et.al. Abstract 804: Antitumor activity of the potent and novel FLT3 inhibitor HM43239 in acute myeloid leukemia. Cancer Res July 1 2018 (78) (13 Supplement) 804.

Products are for research use only. Not for human use.