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Tandutinib (MLN518) FLT3 inhibitor

Cat.No.S1043

Tandutinib (MLN518, CT53518, NSC726292) is a potent FLT3 antagonist with IC50 of 0.22 μM. This compound also inhibits PDGFR and c-Kit, with 15 to 20-fold higher potency for FLT3 versus CSF-1R and >100-fold selectivity for the same target versus FGFR, EGFR and KDR. It was studied in Phase 2.
Tandutinib (MLN518) FLT3 inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 562.7

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Quality Control

Batch: Purity: 99.88%
99.88

Solubility

In vitro
Batch:

Ethanol : 100 mg/mL

DMSO : 35 mg/mL (62.2 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

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In vivo
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Chemical Information, Storage & Stability

Molecular Weight 562.7 Formula

C31H42N6O4

Storage (From the date of receipt)
CAS No. 387867-13-2 Download SDF Storage of Stock Solutions

Synonyms CT 53518, NSC726292, MLN518 Smiles CC(C)OC1=CC=C(C=C1)NC(=O)N2CCN(CC2)C3=NC=NC4=CC(=C(C=C43)OC)OCCCN5CCCCC5

Mechanism of Action

Targets/IC50/Ki
c-Kit
0.17 μM
PDGFRβ
0.20 μM
FLT3
0.22 μM
CSF-1R
3.43 μM
In vitro

Tandutinib (MLN518) has little activity against EGFR, FGFR, KDR, InsR, Src, Abl, PKC, PKA and MAPKs. It inhibits IL-3-independent cell growth and FLT3-ITD autophosphorylation with an IC50 of 10-100 nM. This compound also inhibits the proliferation of human leukemia Ba/F3 cells containing FLT3-ITD mutations with IC50 values of 10-30 nM, and the FLT3-ITD-positive Molm-13 and Molm-14 cells with an IC50 of 10 nM. In FLT3-ITD-positive Molm-14 cells but not the FLT3-ITD-negative THP-1 cells, Tandutinib treatment leads to significant apoptosis by 51% and 78% at 24 and 96 hours, respectively, due to specific FLT3 inhibition. It preferentially inhibits the growth of blast colonies from FLT3 ITD-positive compared with ITD-negative patients with AML, without affecting colony formation by normal human progenitor cells.

Kinase Assay
Cell based receptor autophosphorylation assays
Autophosphorylation of PDGFR family kinase assays are cell-based enzyme-linked immunosorbent (ELISA) assays using CHO cells expressing wild-type PDGFRβ, chimeric protein PDGFRβ/c-Kit, and PDGFRβ/Flt3 which contain the extracellular and transmembrane domains of PDGFRβ and the cytoplasmic domain of c-Kit, and Flt-3. Cells are grown to confluency in 96-well microtiter plates under standard tissue culture conditions, followed by serum starvation for 16 hours. Briefly, quiescent cells are incubated at 37 °C with increasing concentrations of Tandutinib (MLN518) for 30 minutes followed by the addition of 8 nM PDGF-BB for 10 minutes. Cells are lysed in 100 mM Tris, pH 7.5, 750 mM NaCl, 0.5% Triton X-100, 10 mM sodium pyrophosphate, 50 mM NaF, 10 μg/mL leupeptin, 1 mM phenylmethylsulfonyl fluoride, 1 mM sodium vanadate, and the lysate is cleared by centrifugation at 15,000g for 5 minutes. Clarified lysates are transferred into a second microtiter plate in which the wells are previously coated with 500 ng/well of 1B5B11 anti-PDGFRβ mAb and then incubated for 2 hours at room temperature. After washing three times with binding buffer (0.3% gelatin, 25 mM HEPES, pH 7.5, 100 mM NaCl, 0.01% Tween 20), 250 ng/mL of rabbit polyclonal anti-phosphotyrosine antibody is added and plates are incubated at 37 °C for 60 minutes. Subsequently, each well is washed three times with binding buffer and incubated with 1 μg/mL of horseradish peroxidase-conjugated anti-rabbit antibody at 37 °C for 60 minutes. Wells are washed prior to adding 2,2
In vivo

Oral administration of Tandutinib (MLN518) at 60 mg/kg bid significantly increases the survival in mice bearing Ba/F3 cells expressing W51 FLT3-ITD mutant, and gives a significant reduction in mortality in a mouse bone marrow transplantation model. Treatment with this compound at 180 mg/kg twice daily has mild toxicity toward normal hematopoiesis, however, it is a dose at which it is effective in treating FLT3 ITD-positive leukemia in mice.

References

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00904852 Withdrawn
Glioblastoma Multiforme
Millennium Pharmaceuticals Inc.
June 2009 Phase 1

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