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Purity: =99.95%
ONC206 (ONC-206; ONC 206), an analogue of ONC201 (TRAIL inducer) and benzyl-flurobenzyl imipridone, is a novel, potent and selective antagonist of the D2-like dopamine receptors (DRD2/3/4) with a broad-spectrum of anticancer activity. DRD2 is a G protein-coupled receptor (GPCR) that is overexpressed in many cancers, controls an array of pro-survival signaling pathways, and its antagonism causes anti-cancer effects. ONC201, the founding member of the imipridone class of anti-cancer compounds, is a small molecule DRD2 antagonist that is in Phase I/II advanced cancer clinical trials. In this study, we evaluated the binding target and antitumor activity of ONC206, a chemical analogue of ONC201.
| Targets |
D2-like dopamine receptors (DRD2/3/4)
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|---|---|
| ln Vitro |
In contrast to D1 samples (DRD 1/5), ONC206 is selective against D2 samples (DRD2/3/4) [2]. Tumor cell migration and toxins are strongly inhibited by ONC206 [1]. 0.05 μM; over 48 hours) does not cause cell death or limit cell proliferation, but rather inhibits the migration of ONC201 and TRAIL-activated HCT116 Bax migration cells [1]. ISR and TRAIL trapping, which induces tumor development and cell death, is mediated by ONC206 [1]. Induced cells in the cell proliferation experiment for colorectal cell lines do not develop ONC201 resistance in ONC206 [1].
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| ln Vivo |
Onc206 (100 mg/kg; sidewall every ten times) significantly inhibits the growth of tumors [2].
Efficacy evaluations in MHH-ES-1 athymic nude mice xenografts demonstrated that ONC206 (100 mg/kg PO every 10 days) causes significant tumor growth inhibition that was comparable to methotrexate (400 mg/kg, IP) while being better tolerated. In summary, ONC206 is an imipridone that acts as a selective antagonist of DRD2 at nanomolar concentrations and has broad-spectrum anti-tumor activity. ONC206 may address tumor types where the properties of ONC201 do not permit for complete therapeutic engagement in vivo.[2] |
| Enzyme Assay |
An orphan small molecule target prediction algorithm revealed that ONC206, like ONC201, antagonizes DRD2. Experimental GPCR profiling using the PathHunter® β-Arrestin assay, determined that ONC206 selectively antagonizes the D2-like (DRD2/3/4), but not the D1-like (DRD 1/5), subfamily of dopamine receptors. ONC206 possesses a ~10-fold increased affinity for DRD2 compared to ONC201 with a Ki of ~320nM with selectivity that was superior to approved antipsychotics. The increased association rate for the ONC206-DRD2 interaction was responsible for the increased affinity, whereas the dissociation rate was similar to ONC201 and atypical antipsychotics that are well tolerated [2].
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| Cell Assay |
Cell proliferation assay [1]
Cell Types: HCT116 Cell Tested Concentrations: 0.05 μM Incubation Duration: over 48 hrs (hours) Experimental Results: Inhibition of ONC201- and TRAIL-resistant HCT116 Bax−/− Cell migration. |
| Animal Protocol |
In the PC12 rat pheochromocytoma cell line ONC206 (GI50 200nM) was superior to ONC201. ONC206 time-course experiments revealed anti-cancer effects occurring at 48-72 post-treatment, similar to ONC201. In support of a wide therapeutic window, ONC206 reduced the viability of normal fibroblasts (HFF-1) at relatively high doses (GI50 > 5µM). Efficacy evaluations in MHH-ES-1 athymic nude mice xenografts demonstrated that ONC206 (100 mg/kg PO every 10 days) causes significant tumor growth inhibition that was comparable to methotrexate (400 mg/kg, IP) while being better tolerated.
In summary, ONC206 is an imipridone that acts as a selective antagonist of DRD2 at nanomolar concentrations and has broad-spectrum anti-tumor activity. ONC206 may address tumor types where the properties of ONC201 do not permit for complete therapeutic engagement in vivo [2]. |
| References |
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| Additional Infomation |
DRD2 Antagonist/ClpP Agonist ONC206 is an orally bioavailable, selective bitopic dopamine receptor D2 (DRD2) antagonist and mitochondrial caseinolytic protease P (ClpP) agonist, with potential antineoplastic activity. Upon administration, DRD2 antagonist/ClpP agonist ONC206 targets, binds to and inhibits the activity of DRD2. This may inactivate Akt (protein kinase B) and extracellular signal-regulated kinase (ERK), which may result in inhibition of the phosphatidylinositol 3-kinase (PI3K)/Akt signal transduction pathway as well as the mitogen-activated protein kinase (MAPK)/ERK-mediated pathway. This may lead to the induction of tumor cell apoptosis mediated by tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL)/death receptor type 5 (DR5; TRAIL receptor 2) signaling in tumor cells. In addition, ONC206 targets and binds to ClpP and induces proteolysis. This may disrupt mitochondrial structure and function in tumor cells and lead to tumor cell death. DRD2, a G protein-coupled receptor (GPCR), is overexpressed in various malignancies. It is activated by dopamine produced by the tumor cells or present in the tumor microenvironment (TME) and plays an important role in the pro-survival and stress signaling pathways. ONC206 is able to cross the blood-brain barrier (BBB).
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| Molecular Formula |
C23H22F2N4O
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|---|---|
| Molecular Weight |
408.4438
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| Exact Mass |
408.176
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| Elemental Analysis |
C, 67.63; H, 5.43; F, 9.30; N, 13.72; O, 3.92
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| CAS # |
1638178-87-6
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| PubChem CID |
135297777
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| Appearance |
Off-white to light yellow solid
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| LogP |
2.2
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| Hydrogen Bond Donor Count |
0
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| Hydrogen Bond Acceptor Count |
5
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| Rotatable Bond Count |
4
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| Heavy Atom Count |
30
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| Complexity |
733
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| Defined Atom Stereocenter Count |
0
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| InChi Key |
ITMGVSSHWMTJRR-UHFFFAOYSA-N
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| InChi Code |
InChI=1S/C23H22F2N4O/c24-18-7-6-17(20(25)12-18)14-29-22(30)19-15-27(13-16-4-2-1-3-5-16)10-8-21(19)28-11-9-26-23(28)29/h1-7,12H,8-11,13-15H2
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| Chemical Name |
7-benzyl-4-(2,4-difluorobenzyl)-2,4,6,7,8,9-hexahydroimidazo[1,2-a]pyrido[3,4-e]pyrimidin-5(1H)-one
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| Synonyms |
ONC 206; ONC-206; ONC206; 1638178-87-6; UNII-OW6LM47PNK; ONC-206; OW6LM47PNK; 11-benzyl-7-[(2,4-difluorophenyl)methyl]-2,5,7,11-tetrazatricyclo[7.4.0.02,6]trideca-1(9),5-dien-8-one; 4-((2,4-Difluorophenyl)methyl)-2,4,6,7,8,9-hexahydro-7-(phenylmethyl)imidazo(1,2-a)pyrido(3,4-E)pyrimidin-5(1H)-one; 7-Benzyl-4-(2,4-difluorobenzyl)-1,2,6,7,8,9-hexahydroimidazo[1,2-a]pyrido[3,4-e]pyrimidin-5(4H)-one; ONC206
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
DMSO : ~100 mg/mL (~244.83 mM)
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|---|---|
| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 3.25 mg/mL (7.96 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 32.5 mg/mL clear DMSO stock solution to 400 μL of PEG300 and mix evenly; then add 50 μL of Tween-80 to the above solution and mix evenly; then add 450 μL of normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 3.25 mg/mL (7.96 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 32.5 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. 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. View More
Solubility in Formulation 3: ≥ 3.25 mg/mL (7.96 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. Solubility in Formulation 4: 10 mg/mL (24.48 mM) in Cremophor EL (add these co-solvents sequentially from left to right, and one by one), clear solution; with ultrasonication. |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.4483 mL | 12.2417 mL | 24.4834 mL | |
| 5 mM | 0.4897 mL | 2.4483 mL | 4.8967 mL | |
| 10 mM | 0.2448 mL | 1.2242 mL | 2.4483 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.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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