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Pipendoxifene (ERA-923) is a novel and potent estrogen antagonist (SERM) with antitumor activity. It inhibits estrogen binding to ER-alpha with IC50 of 14 nM. In ER-alpha-positive human MCF-7 breast carcinoma cells, ERA-923 inhibits estrogen-stimulated growth (IC50 = 0.2 nM) associated with cytostasis. In vitro, a MCF-7 variant with inherent resistance to tamoxifen (10-fold) or 4-OH tamoxifen (>1000-fold) retains complete sensitivity to ERA-923 . In preclinical models, ERA-923 has an improved efficacy and safety compared with tamoxifen. In the combination with temsirolimus, ERA-923 showed excellent anticancer activity in preclinical models.
| ln Vitro |
Pipendoxifene possesses exceptional preclinical pharmacology profiles, making it a novel 2-phenylindole selective estrogen receptor modulator (SERM) that has been chosen for additional research in the treatment of metastatic breast cancer [1].
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| References | |
| Additional Infomation |
ER modulator, ERA-923(Pipendoxifene) is a estrogen receptor modulator being evaluated for the treatment of breast cancer. Pipendoxifene is a new 2-phenyl indole selective estrogen receptor modulators (SERM )that exhibits an excellent preclinical pharmacological profile and was selected for further development as a treatment for metastatic breast cancer.
Pipendoxifene is a nonsteroidal 2-phenyl indole and a selective estrogen receptor modulator (SERM) with potential antineoplastic activity. Pipendoxifene antagonizes binding of estradiol to estrogen receptor alpha (ER alpha), thereby inhibiting ER alpha-mediated gene expression, interfering with estrogen activity and inhibiting estrogen-stimulated growth in estrogen-dependent breast cancer. In addition, this agent also exerts intrinsic estrogenic activity depending on the tissue types. Drug Indication Investigated for use/treatment in breast cancer. Mechanism of Action ERA-923 inhibits estrogen-stimulated growth associated with cytostasis. It has been shown to have a potent, selective oestrogen modulating effect, with few uterine side-effects. |
| Molecular Formula |
C29H32N2O3
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|---|---|
| Molecular Weight |
456.58
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| Exact Mass |
456.241
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| CAS # |
198480-55-6
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| Related CAS # |
Pipendoxifene hydrochloride;245124-69-0
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| PubChem CID |
6433099
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| Appearance |
Off-white to light yellow solid powder
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| Density |
1.2g/cm3
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| Boiling Point |
685.8ºC at 760mmHg
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| Flash Point |
368.6ºC
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| Vapour Pressure |
1.93E-19mmHg at 25°C
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| Index of Refraction |
1.628
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| LogP |
5.878
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| Hydrogen Bond Donor Count |
2
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| Hydrogen Bond Acceptor Count |
4
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| Rotatable Bond Count |
7
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| Heavy Atom Count |
34
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| Complexity |
611
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| Defined Atom Stereocenter Count |
0
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| InChi Key |
JICOGKJOQXTAIP-UHFFFAOYSA-N
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| InChi Code |
InChI=1S/C29H32N2O3/c1-21-27-19-25(33)11-14-28(27)31(29(21)23-7-9-24(32)10-8-23)20-22-5-12-26(13-6-22)34-18-17-30-15-3-2-4-16-30/h5-14,19,32-33H,2-4,15-18,20H2,1H3
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| Chemical Name |
2-(4-hydroxyphenyl)-3-methyl-1-[[4-(2-piperidin-1-ylethoxy)phenyl]methyl]indol-5-ol
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| Synonyms |
ERA-923 ERA 923 ERA923
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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 Note: Please store this product in a sealed and protected environment, avoid exposure to moisture. |
| 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) |
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
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| 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
Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)(e.g. IP/IV/IM/SC) *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). View More
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)] 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). View More
Oral Formulation 3: Dissolved in PEG400 (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.1902 mL | 10.9510 mL | 21.9020 mL | |
| 5 mM | 0.4380 mL | 2.1902 mL | 4.3804 mL | |
| 10 mM | 0.2190 mL | 1.0951 mL | 2.1902 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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