NT219 is a potent dual (bifunctional) inhibitor of insulin receptor substrate 1/2 (IRS1/2) and STAT3. IRS1/2 and STAT3 are major signaling connections regulated by a variety of oncogenes. NT219 affects IRS1/2 degradation and inhibits STAT3 phosphorylation. NT219 may be used for studying cancer diseases.

Physicochemical Properties

Molecular Formula	C16H14BRNO5S
Molecular Weight	412.255062580109
Exact Mass	410.977
CAS #	1198078-60-2
PubChem CID	135914977
Appearance	Yellow to brown solid powder
LogP	2.6
Hydrogen Bond Donor Count	6
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	4
Heavy Atom Count	24
Complexity	454
Defined Atom Stereocenter Count	0
SMILES	C(NCC1=CC(O)=C(O)C(O)=C1)(=S)/C=C/C1=CC=C(O)C(O)=C1Br
InChi Key	XDDQKKXXQHUUHJ-DUXPYHPUSA-N
InChi Code	InChI=1S/C16H14BrNO5S/c17-14-9(1-3-10(19)16(14)23)2-4-13(24)18-7-8-5-11(20)15(22)12(21)6-8/h1-6,19-23H,7H2,(H,18,24)/b4-2+
Chemical Name	(E)-3-(2-bromo-3,4-dihydroxyphenyl)-N-[(3,4,5-trihydroxyphenyl)methyl]prop-2-enethioamide
Synonyms	NT-219 NT 219 NT219
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture and light.
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References

[1]. A phase 1/2 study with open-label, dose escalation phase followed by single-arm expansion at the maximum tolerated dose to assess the safety, tolerability, pharmacokinetics, pharmacodynamics, and efficacy of NT219 injection alone and in combination with cetuximab in adults with advanced solid tumors and head and neck cancer. [2]. NT219, a dual inhibitor of IRS1/2 and STAT3, suppresses cancer stem cell-mediated resistance to KRASG12C and KRASG12D inhibitors in solid tumors. cell, 2024, 3(2): 1. [3]. Abstract C45: NT219, a novel bispecific inhibitor of STAT3 and IRS1/2, combined with chemotherapy or MEK inhibitor in gemcitabine-resistant pancreatic tumors, induced tumor regression. Cancer Research, 2019, 79(24_Supplement): C45-C45.

Additional Infomation

IRS1/IRS2/STAT3 Inhibitor NT219 is an inhibitor of signal transducer and activator of transcription 3 (STAT3) and insulin receptor substrate 1 (IRS1) and 2 (IRS2), with potential antineoplastic activity. Upon administration, the IRS1/IRS2/STAT3 inhibitor NT219 specifically targets and binds to IRS1/2 and STAT3. Inhibiting IRS1/2 prevents IRS1/2-mediated signaling pathways and other tumor survival pathways. Inhibiting STAT3 prevents nuclear translocation of STAT3 and the STAT3-mediated regulation of oncogenes expression. This causes tumor cell apoptosis and inhibits tumor cell proliferation. IRS1/2 and STAT3, oncogenic drivers that are upregulated in a variety of human cancers, play key roles in uncontrolled tumor cell proliferation and tumor resistance.

Solubility Data

Solubility (In Vitro)

DMSO : ≥ 100 mg/mL (~242.57 mM)

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.4257 mL	12.1283 mL	24.2565 mL
	5 mM	0.4851 mL	2.4257 mL	4.8513 mL
	10 mM	0.2426 mL	1.2128 mL	2.4257 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.