Poziotinib (HM781-36B)

Catalog No.S7358 Synonyms: NOV120101

Poziotinib (HM781-36B) Chemical Structure

Molecular Weight(MW): 491.34

Poziotinib (HM781-36B) is an irreversible pan-HER inhibitor with IC50 of 3.2 nM, 5.3 nM and 23.5 nM for HER1, HER2, and HER4, respectively. Phase 2.

Size Price Stock Quantity  
USD 147 In stock
USD 477 In stock
USD 997 In stock
Bulk Discount

Free Overnight Delivery on orders over $ 500
Next day delivery by 10:00 a.m. Order now.

Purity & Quality Control

Choose Selective EGFR Inhibitors

Biological Activity

Description Poziotinib (HM781-36B) is an irreversible pan-HER inhibitor with IC50 of 3.2 nM, 5.3 nM and 23.5 nM for HER1, HER2, and HER4, respectively. Phase 2.
HER1 [1]
(Cell-free assay)
HER2 [1]
(Cell-free assay)
HER4 [1]
(Cell-free assay)
3.2 nM 5.3 nM 23.5 nM
In vitro

Poziotinib specifically inhibits the cell growth in HER2 amplified gastric cancer cells, and inhibits the phosphorylation of EGFR and key components of downstream signaling cascades such as STAT3, AKT and ERK. Poziotinib also induces apoptosis and G1 cell cycle arrest by activating the mitochondrial pathway in HER2 amplified gastric cancer cells. Furthermore, Poziotinib also exerts synergistic effects with chemotherapeutic agents in both HER2 amplified and HER2 non-amplified gastric cancer cells. [1]

In vivo In nude mice bearing N87 human gastric cancer xenografts, Poziotinib (0.5 mg/kg p.o.) alone significantly inhibits the growth of tumors, and coadministraion of Poziotinib and 5-FU causes more effective tumor inhibition. [1] In addition, HM781-36B shows excellent antitumor activity in a variety of EGFR- and HER-2-dependent tumor xenograft models, including erlotinib-sensitive HCC827 NSCLC cells, erlotinib-resistant NCI-H1975 NSCLC cells, HER-2 overexpressing Calu-3 NSCLC cells, NCI-N87 gastric cancer cells, SK-Ov3 ovarian cancer cells and EGFR-overexpressing A431 epidermoid carcinoma cancer cells. [2]


Kinase Assay:[1]
+ Expand

Enzyme activity assay:

To determine the IC50 values of HM781-36B for kinase inhibition, enzymes of EGFR, HER2, and HER4 are expressed as recombinant proteins in Sf9 insect cells. Enzyme selectivity screening is then performed using a tyrosine kinase assay kit. Briefly, the reactions are performed in 96 well polystyrene round-bottomed plates containing kinase buffer composed of 100 mM HEPES (pH 7.4), 25 mM MgCl2, 10 mM MnCl2 and 250 μM Na3VO4. The reactions are initiated by the addition of 100 ng/assay enzyme, 100 μM ATP, and 10 ng/mL poly(Glu, Tyr). After 1 h of incubation at room temperature, the reactions are terminated by adding 6 mM EDTA solution and then anti-phosphotyrosine antibody, PTK Green Tracer, and FP dilution buffer mixtures. The fluorescence polarization values are then measured after 30 min at room temperature using a Victor3 microplate reader. Finally, the IC50 values were calculated using the following equation: Y = bottom + (top–bottom)/(1 + 10(X-logIC50)).
Cell Research:[1]
+ Expand
  • Cell lines: Gastric cancer cell lines (SNU-1, 5, 16, 216, 484, 601, 620, 638, 668, 719, N87 and AGS)
  • Concentrations: ~10 μM
  • Incubation Time: 72 hours
  • Method: Viable cell growth is determined by an MTT reduction assay. Briefly, all cell lines are seeded at a density of 3 × 103 per well in 96-well culture plates and then incubated at 37 °C for 24 h. The cells are then treated with 0.001, 0.01, 0.1, or 10 μM of HM781-36B. Three days later, 50 μg of MTT are added to each well and the samples are then incubated for 4 h to reduce the dye. Next, the samples are treated with DMSO, after which the absorbance of the converted dye in the living cells is measured at a wavelength of 540 nm. Six replicate wells are used for each analysis, and at least three independent experiments are conducted. Data points shown represent the mean while bars represent the SE.
    (Only for Reference)
Animal Research:[1]
+ Expand
  • Animal Models: BALB/c athymic nude mice bearing N87 xenografts
  • Formulation: Suspended in 23% PEG/TW in water
  • Dosages: 0.5 mg/kg daily
  • Administration: p.o.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 98 mg/mL (199.45 mM)
Water Insoluble
Ethanol Insoluble
In vivo Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
2% DMSO+40% PEG 300+2% Tween 80+ddH2O
For best results, use promptly after mixing.

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 491.34


CAS No. 1092364-38-9
Storage powder
in solvent
Synonyms NOV120101

Bio Calculators

Molarity Calculator

Molarity Calculator

Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

  • Mass
    Molecular Weight

*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).

Dilution Calculator

Dilution Calculator

Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:

Concentration (start) x Volume (start) = Concentration (final) x Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )

  • C1

* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).

The Serial Dilution Calculator Equation

  • Serial Dilutions

  • Computed Result

  • C1=C0/X C1: LOG(C1):
    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
    C5=C4/X C5: LOG(C5):
    C6=C5/X C6: LOG(C6):
    C7=C6/X C7: LOG(C7):
    C8=C7/X C8: LOG(C8):
Molecular Weight Calculator

Molecular Weight Calculator

Enter the chemical formula of a compound to calculate its molar mass and elemental composition:

Total Molecular Weight: g/mol

Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03429101 Recruiting Breast Cancer Spectrum Pharmaceuticals Inc May 2018 Phase 1
NCT03318939 Recruiting NSCLC Spectrum Pharmaceuticals Inc October 13 2017 Phase 2
NCT03292250 Recruiting HNSCC|Head and Neck Neoplasms Seoul National University Hospital|Korean Cancer Study Group|Chungnam National University Hospital September 10 2017 Phase 2
NCT03066206 Recruiting Malignant Neoplasm of Respiratory and Intrathoracic Organ|Non-Small Cell Lung Cancer M.D. Anderson Cancer Center|Lung Cancer Research Foundation|Spectrum Pharmaceuticals Inc March 17 2017 Phase 2
NCT02979821 Completed HER2 Gene Mutation|Adenocarcinoma Lung Stage IV Korean Association for the Study of Targeted Therapy|Konkuk University Medical Center|Kyungpook National University|Kosin University Gospel Hospital|Chonnam National University Hospital|Chungnam National University Hospital October 2016 Phase 2
NCT02659514 Recruiting Breast Cancer Spectrum Pharmaceuticals Inc February 2016 Phase 2

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

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

  • * Indicates a Required Field

EGFR Signaling Pathway Map

Related EGFR Products0

Tags: buy Poziotinib (HM781-36B) | Poziotinib (HM781-36B) supplier | purchase Poziotinib (HM781-36B) | Poziotinib (HM781-36B) cost | Poziotinib (HM781-36B) manufacturer | order Poziotinib (HM781-36B) | Poziotinib (HM781-36B) distributor
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID