PX-478 2HCl

HIF-1α inhibitor CAS# 685898-44-6

PX-478 2HCl

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Chemical structure

PX-478 2HCl

3D structure

Chemical Properties of PX-478 2HCl

Cas No. 685898-44-6 SDF Download SDF
PubChem ID 11234794 Appearance Powder
Formula C13H20Cl4N2O3 M.Wt 394.12
Type of Compound N/A Storage Desiccate at -20°C
Solubility DMSO : 100 mg/mL (253.73 mM; Need ultrasonic)
H2O : ≥ 35 mg/mL (88.81 mM)
*"≥" means soluble, but saturation unknown.
Chemical Name 4-[(2S)-2-amino-2-carboxyethyl]-N,N-bis(2-chloroethyl)benzeneamine oxide;dihydrochloride
SMILES C1=CC(=CC=C1CC(C(=O)O)N)[N+](CCCl)(CCCl)[O-].Cl.Cl
Standard InChIKey GIGCDIVNDFQKRA-LTCKWSDVSA-N
Standard InChI InChI=1S/C13H18Cl2N2O3.2ClH/c14-5-7-17(20,8-6-15)11-3-1-10(2-4-11)9-12(16)13(18)19;;/h1-4,12H,5-9,16H2,(H,18,19);2*1H/t12-;;/m0../s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of PX-478 2HCl

DescriptionPX-478 is an inhibitor of hypoxia-inducible factor-1α (HIF-1α), and is cytotoxic to a variety of cancer cell lines under normoxia and hypoxia in vitro with IC50 of 20-30 μM.In Vitro:PC3 and DU 145 cells express HIF-1α protein are treated with PX-478 for 20 hr under normoxia. PC3 cells are more sensitive to PX-478 as compared with DU 145 cells. Densitometric analysis shows that the IC50 for HIF-1α inhibition for PC3 cells under normoxic condition is 20-25 μM, whereas the IC50 for HIF-1α inhibition for the DU 145 cells is 40-50 μM. PC3 and DU 145 cells are treated with different concentrations of PX-478 (10, 20, 30, 40, 50, and 60 μM) for 18-20 hr under normoxia or hypoxia. Under normoxia, PC3 cells are more sensitive to PX-478 than DU 145 cells. IC50 for clonogenic survival (n=3) is 17 μM for PC3 cells and 35 μM for DU 145 cells. When cells are treated with the drug under hypoxic condition for 18 hr, the IC50 is 16 μM for PC3 cells and 22 μM for DU 145 cells. Thus DU 145 cells are more sensitive to PX-478 under hypoxic condition[1].In Vivo:PX-478 is administered to mice with congenital HO (Nfatc1-Cre/caACVR1fl/fl) every other day starting from birth for 2 wk. Treated mice have significantly less ectopic bone at the ankle joints compared with mutant mice treated with vehicle (6.8 mm3 vs. 2.2 mm3, P<0.01)[2].

References:
[1]. Palayoor ST, et al. PX-478, an inhibitor of hypoxia-inducible factor-1alpha, enhances radiosensitivity of prostate carcinoma cells. Int J Cancer. 2008 Nov 15;123(10):2430-2437. [2]. Agarwal S, et al. Inhibition of Hif1α prevents both trauma-induced and genetic heterotopic ossification. Proc Natl Acad Sci U S A. 2016 Jan 19;113(3):E338-47.

Protocol

Cell Assay [1]
To determine the effect of PX-478 in combination with radiation, cells are treated with PX-478 for 24 hr under normoxic condition, irradiated and plated after 1 hr. Colonies are stained with crystal violet after 12 days and the colonies of >50 cells are counted. For combination treatments, net survival is calculated by correcting the toxicity of PX-478 alone. Enhancement factor (EF) is calculated by dividing the dose of radiation required to reduce plating efficiency to 10% when cells are treated with radiation alone by the dose of radiation required to reduce plating efficiency to 10% when cells are treated with PX-478 and radiation[1].

Animal Administration [2]
Mice[2] Burn/tenotomy or hybrid HO mice are administered PX-478 (100 mg/kg) or Rapamycin (5 mg/kg) in PBS solution via intraperitoneal injection. Mice receive injections every other day for the duration of the study. Nfatc1-Cre/caACVR1fl/wt mice are administered PX-478 (100 mg/kg) every other day for a total of 2 wk.

References:
[1]. Palayoor ST, et al. PX-478, an inhibitor of hypoxia-inducible factor-1alpha, enhances radiosensitivity of prostate carcinoma cells. Int J Cancer. 2008 Nov 15;123(10):2430-2437. [2]. Agarwal S, et al. Inhibition of Hif1α prevents both trauma-induced and genetic heterotopic ossification. Proc Natl Acad Sci U S A. 2016 Jan 19;113(3):E338-47.

PX-478 2HCl Dilution Calculator

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PX-478 2HCl Molarity Calculator

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Preparing Stock Solutions of PX-478 2HCl

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.5373 mL 12.6865 mL 25.373 mL 50.746 mL 63.4325 mL
5 mM 0.5075 mL 2.5373 mL 5.0746 mL 10.1492 mL 12.6865 mL
10 mM 0.2537 mL 1.2686 mL 2.5373 mL 5.0746 mL 6.3432 mL
50 mM 0.0507 mL 0.2537 mL 0.5075 mL 1.0149 mL 1.2686 mL
100 mM 0.0254 mL 0.1269 mL 0.2537 mL 0.5075 mL 0.6343 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on PX-478 2HCl

PX-478 2HCl, also called PX-478, is an experimental HIF-1α inhibitor. It inhibited HIF-1α protein at multiple levels in cancer cell lines under normoxia and hypoxia with an IC50 value of ~20-30 μM [1].

Hypoxia-inducible transcription factor HIF-1α activates target genes involved in glycolysis, erythropoiesis and angiogenesis. HIF-1α also regulates the expression of genes coding for apoptotic pathway, growth factors/receptors, cell cycle regulators, metastasis and invasiveness [1].

Under normoxic condition, the IC50 for PX-478 to inhibit HIF-1α in PC3 cells was 20-25 μmol/L, whereas the IC50 for PX-478 to inhibit HIF-1α in the DU 145 cells was ~40-50 μmol/L. in both DU 145 and PC3 cells, 1-hr hypoxia significantly upregulated HIF-1α protein. But the pretreatment with PX-478 for 20 hr under normoxia before 1-hr hypoxia attenuated the accumulation of HIF-1α induced by the 1-hr hypoxia. In PC3 cells, pretreatment with 20 μmol/L PX-478 before hypoxia inhibited HIF-1α by 40% compared to treatment with hypoxia alone. In DU 145 cells, pretreatment with 50 μmol/L PX-478 before hypoxia inhibited HIF-1α by 35% compared to treatment with hypoxia alone [1].

In nu/nu mice with C6 reporter xenografts, treatment with PX-478 at a dose of 30 mg/kg p.o. for 2 consecutive days prevented the transcriptional activity of HIF-1 in central ischemic regions of C6 tumors [2].

References:
[1].  Palayoor ST, Mitchell JB, Cerna D, et al. PX-478, an inhibitor of hypoxia-inducible factor-1α, enhances radiosensitivity of prostate carcinoma cells. International journal of cancer, 2008, 123(10): 2430-2437.
[2].  Schwartz DL, Powis G, Thitai-Kumar A, et al. The selective hypoxia inducible factor-1 inhibitor PX-478 provides in vivo radiosensitization through tumor stromal effects. Molecular cancer therapeutics, 2009, 8(4): 947-958.

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Description

PX-478 is an antitumor inhibitor of hypoxia-inducible factor-1α (HIF-1α).

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