Motesanib Diphosphate (AMG-706)

Catalog No.S1032

For research use only.

Motesanib Diphosphate (AMG-706) is a potent ATP-competitive inhibitor of VEGFR1/2/3 with IC50 of 2 nM/3 nM/6 nM, respectively; similar activity against Kit (c-Kit), ~10-fold more selective for VEGFR than PDGFR and Ret. Phase 3.

Motesanib Diphosphate (AMG-706) Chemical Structure

CAS No. 857876-30-3

Selleck's Motesanib Diphosphate (AMG-706) has been cited by 11 Publications

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Biological Activity

Description Motesanib Diphosphate (AMG-706) is a potent ATP-competitive inhibitor of VEGFR1/2/3 with IC50 of 2 nM/3 nM/6 nM, respectively; similar activity against Kit (c-Kit), ~10-fold more selective for VEGFR than PDGFR and Ret. Phase 3.
Targets
VEGFR1 [1]
(Cell-free assay)
VEGFR2 [1]
(Cell-free assay)
VEGFR2/Flk1 [1]
(Cell-free assay)
VEGFR3 [1]
(Cell-free assay)
Kit [1]
(Cell-free assay)
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2 nM 3 nM 6 nM 6 nM 8 nM
In vitro

Motesanib Diphosphate has broad activity against the human VEGFR family, and displays >1000 selectivity against EGFR, Src, and p38 kinase. Motesanib Diphosphate significantly inhibits VEGF-induced cellular proliferation of HUVECs with an IC50 of 10 nM, while displaying little effect at bFGF-induced proliferation with an IC50 of >3,000 nM. Motesanib Diphosphate also potently inhibits PDGF-induced proliferation and SCF-induced c-kit phosphorylation with IC50 of 207 nM and 37 nM, respectively, but not effective against the EGF-induced EGFR phosphorylation and cell viability of A431 cells. [1] Althouth displaying little antiproliferative activity on cell growth of HUVECs alone, Motesanib Diphosphate treatment significantly sensitizes the cells to fractionated radiation. [2]

In vivo Administration of Motesanib Diphosphate at 100 mg/kg significantly inhibits VEGF-induced vascular permeability in a time-dependent manner. Oral administration of Motesanib Diphosphate twice daily or once daily potently inhibits, in a dose-dependent manner, VEGF-induced angiogenesis using the rat corneal model with ED50 of 2.1 mg/kg and 4.9 mg/kg, respectively. Motesanib Diphosphate induces a dose-dependent tumor regression of established A431 xenografts by selectively targeting neovascularization in tumor cells. [1] Administration of Motesanib Diphosphate in combination with radiation displays significant anti-tumor activity in head and neck squamous cell carcinoma (HNSCC) xenograft models. [2] Motesanib Diphosphate treatment also induces significant dose-dependent reductions in tumor growth and blood vessel density of MCF-7, MDA-MB-231, or Cal-51 xenografts, which can be markedly enhanced when combined with docetaxel or tamoxifen. [3]

Protocol (from reference)

Kinase Assay:[1]
  • In vitro kinase assays:

    Optimal enzyme, ATP, and substrate (gastrin peptide) concentrations are established for each enzyme using homogeneous time-resolved fluorescence (HTRF) assays. Motesanib Diphosphate is tested in a 10-point dose-response curve for each enzyme using an ATP concentration of two-thirds Km for each. Most assays consist of enzyme mixed with kinase reaction buffer [20 mM Tris-HCl (pH 7.5), 10 mM MgCl2, 5 mM MnCl2, 100 mM NaCl, 1.5 mM EGTA]. A final concentration of 1 mM DTT, 0.2 mM NaVO4, and 20 μg/mL BSA is added before each assay. For all assays, 5.75 mg/mL streptavidin-allophycocyanin and 0.1125 nM Eu-PT66 are added immediately before the HTRF reaction. Plates are incubated for 30 minutes at room temperature and read on a Discovery instrument. IC50 values are calculated using the Levenberg-Marquardt algorithm into a four-parameter logistic equation.

Cell Research:[1]
  • Cell lines: A431, MO7e, HUVEC and NHDF cells
  • Concentrations: Dissolved in DMSO, final concentrations ~25 μM
  • Incubation Time: 2 hours
  • Method: Cells are preincubated for 2 hours with different concentrations of Motesanib Diphosphate, and exposed with 50 ng/mL VEGF or 20 ng/mL bFGF for an additional 72 hours. Cells are washed twice with DPBS, and plates are frozen at -70 °C for 24 hours. Proliferation is assessed by the addition of CyQuant dye, and plates are read on a Victor 1420 workstation. IC50 data are calculated using the Levenberg-Marquardt algorithm into a four-parameter logistic equatio
Animal Research:[1]
  • Animal Models: Female Sprague-Dawley rats with induced corneal angiogenesis, and female CD-1 nu/nu mice injected s.c. with A431 cells
  • Dosages: ~100 mg/kg
  • Administration: Orally administered twice daily or once daily

Solubility (25°C)

In vitro

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
Saline
For best results, use promptly after mixing.

30 mg/mL

Chemical Information

Molecular Weight 569.44
Formula

C22H23N5O.2H3PO4

CAS No. 857876-30-3
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CC1(CNC2=C1C=CC(=C2)NC(=O)C3=C(N=CC=C3)NCC4=CC=NC=C4)C.OP(=O)(O)O.OP(=O)(O)O

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Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT01386866 Completed Drug: AMG 706 Advanced Solid Tumors Amgen May 2009 Phase 1
NCT00448786 Completed Drug: AMG 706 Solid Tumors Amgen February 2007 Phase 1
NCT00322400 Completed Drug: Docetaxel|Drug: Paclitaxel|Drug: AMG 706 Locally Recurrent and Metastatic Breast Cancer Amgen March 2006 Phase 1
NCT01235416 Completed Drug: AMG 706 Histologically or Cytologically Documented Solid Tumors Amgen September 2005 Phase 1

(data from https://clinicaltrials.gov, updated on 2022-01-17)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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