Name: ONX-0914 (PR-957)
Brand: Selleck Chemicals
SKU: S7172
Availability: InStock
Rating: 5 (22 reviews)

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Quality Control

Batch: Purity: 99.76%

99.76

Related Targets	HDAC Caspase Secretase MMP HCV Protease Cysteine Protease DPP Tyrosinase HIV Protease Serine Protease
Other Proteasome Inhibitors	MG132 Celastrol Epoxomicin (BU-4061T) Oprozomib Delanzomib VR23 Marizomib (Salinosporamide A) PI-1840 Isoginkgetin KSQ-4279 (USP1-IN-1)

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
Raji	Function assay			Inhibition of proteasome subunit beta-5i in human Raji cells using BODIPY-NC005 by fluorescent densitometry, IC50=0.0057μM	25006746
EBC1	Antitumor assay	15 mg/kg	5 days	Antitumor activity against human EBC1 cells xenografted in CD-1 nude mouse assessed as tumor regression at 15 mg/kg, po qd administered for 5 days on and 2 days off up to 32 days	25006746
SJ-GBM2	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells	25006746
SK-N-SH	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-SH cells	25006746
RPMI8226	Function assay			Inhibition of proteasome subunit beta-1i in human RPMI8226 cells using BODIPY-NC001 by fluorescent densitometry, IC50=0.34μM	25006746
Raji	Function assay			Inhibition of proteasome subunit beta-1i in human Raji cells using BODIPY- epoxomicin by fluorescent densitometry, IC50=0.46μM	25006746
Raji	Function assay			Inhibition of proteasome subunit beta-2i in human Raji cells using BODIPY- epoxomicin by fluorescent densitometry, IC50=0.59μM	25006746
RPMI8226	Function assay			Inhibition of proteasome subunit beta-2i in human RPMI8226 cells using BODIPY-epoxomicin by fluorescent densitometry, IC50=0.59μM	25006746
Raji	Function assay			Inhibition of 20s proteasome subunit beta-2c in human Raji cells using BODIPY- epoxomicin by fluorescent densitometry, IC50=1.1μM	25006746
RPMI8226	Function assay			Inhibition of 20s proteasome subunit beta-2c in human RPMI8226 cells using BODIPY-epoxomicin by fluorescent densitometry, IC50=1.1μM	25006746
SK-N-MC	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29339252
RD	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for RD cells	29339252
MG 63 (6-TG R)	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for MG 63 (6-TG R) cells	29339252
NCI-H727	Cytotoxicity assay		48 hrs	Cytotoxicity against human NCI-H727 cells assessed as reduction in cell viability after 48 hrs by Hoechst 33342 staining based HCS assay, EC50=0.3μM	29339252
PC3	Cytotoxicity assay		48 hrs	Cytotoxicity against human PC3 cells assessed as reduction in cell viability after 48 hrs by Hoechst 33342 staining based HCS assay, EC50=0.33μM	29339252
HuH7	Cytotoxicity assay		48 hrs	Cytotoxicity against human HuH7 cells assessed as reduction in cell viability after 48 hrs by Hoechst 33342 staining based HCS assay, EC50=0.39μM	29339252
Caco2	Cytotoxicity assay		48 hrs	Cytotoxicity against human Caco2 cells assessed as reduction in cell viability after 48 hrs by Hoechst 33342 staining based HCS assay, EC50=1.3μM	29339252
DAOY	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for DAOY cells	30380863
A673	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	30380863
Rh41	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh41 cells	30380863
A20	Function assay			Inhibition of LMP2 in mouse A20 cells by ELISA, IC50=0.328μM	30380863
A20	Function assay			Inhibition of 20S proteosome beta 5 in mouse A20 cells by ELISA, IC50=0.401μM	30380863
MOLT4	Function assay			Inhibition of 20S proteosome beta 5 in human MOLT4 cells by ELISA, IC50=0.422μM	30380863
A20	Function assay			Inhibition of MECL1 in mouse A20 cells by ELISA, IC50=0.699μM	30380863
MOLT4	Function assay			Inhibition of MECL1 in human MOLT4 cells by ELISA, IC50=0.902μM	30380863
A20	Function assay			Inhibition of 20S proteosome beta 2 in mouse A20 cells by ELISA, IC50=0.913μM	30380863
MOLT4	Function assay			Inhibition of 20S proteosome beta 2 in human MOLT4 cells by ELISA, IC50=0.927μM	30380863
PBMC	Function assay	100 nM	3 to 72 hrs	Inhibition of 20S proteasome beta 5i in human PBMC cells assessed as induction of PSMB5 expression at 100 nM after 3 to 72 hrs by RT-PCR analysis	31283222
PBMC	Function assay	100 nM	3 to 72 hrs	Inhibition of 20S proteasome beta 5i in human PBMC cells assessed as induction of PSMB6 expression at 100 nM after 3 to 72 hrs by RT-PCR analysis	31283222
PBMC	Function assay	100 nM	3 to 72 hrs	Inhibition of 20S proteasome beta 5i in human PBMC cells assessed as induction of PSMB7 expression at 100 nM after 3 to 72 hrs by RT-PCR method	31283222
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 100 mg/mL (172.21 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : 100 mg/mL

Ethanol : 100 mg/mL

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	5.000mg/ml (8.61mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

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Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	580.67	Formula	C₃₁H₄₀N₄O₇	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	960374-59-8	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	CC(C(=O)NC(CC1=CC=C(C=C1)OC)C(=O)NC(CC2=CC=CC=C2)C(=O)C3(CO3)C)NC(=O)CN4CCOCC4

Mechanism of Action

Features	The first highly selective, small molecule inhibitor of the immunoproteasome. Potential use in cancer and autoimmune diseases (e.g. rheumatoid arthritis, inflammatory bowel disease, and lupus).
Targets/IC₅₀/Ki	LMP7 (Cell-free assay) ~10 nM
In vitro	ONX-0914 (PR-957) is 20- to 40-fold more selective for LMP7 over the next most sensitive sites, β5 or LMP2. It blocks presentation of LMP7-specific, MHC-I–restricted antigens in vitro and in vivo with minimal cross-reactivity for the constitutive proteasome. Selective inhibition of LMP7 by this compound blocks production of interleukin-23 (IL-23) by activated monocytes and interferon-gamma and IL-2 by T cells. LMP7 inhibition blocks production of IL-23 by ~90% and of tumor necrosis factor-α (TNF-α) and IL-6 by ~50%.
In vivo	In mouse models of rheumatoid arthritis and lupus, treatment with ONX-0914 (PR-957) reverses signs of disease and results in reductions in cellular infiltration, cytokine production and autoantibody levels at well-tolerated doses. The maximum tolerated dose (MTD) of this compound in mice is 30 mg/kg body weight. IFN-g release is inhibited by ~60% at LMP7-selective concentrations and by ~90% at higher concentrations. Production of IL-2 is also inhibited by ~50%.
References	[1] https://pubmed.ncbi.nlm.nih.gov/19525961/

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ONX-0914 (PR-957) Proteasome inhibitor

Chemical Structure

Molecular Weight: 580.67