A1934-5mg | Oprozomib (ONX-0912) [935888-69-0] Clinisciences

Background

ONX-0912 (as known as oprozomib), discovered during a medicinal chemistry effort using tripeptide epoxyketones, is an orally bio-available and potent proteasome inhibitor that inhibits growth and induces apoptosis in bortezomib resistant multiple myeloma (MM) cells. Although ONX-0912, an analog of carfilzomib, is structurally distinct from bortezomib, it possesses the same ability as bortezomib to predominantly inhibit chymotrypsin-like activity of the proteasome. ONX-0912 exhibits significant anti-MM activities to reduce tumor progression and prolong survival in many animal tumor model studies, which are associated with activation of caspase-3, caspase-8, caspase-9, and poly(ADP) ribose polymerase and inhibition of anglogensis and MM cells migration.

Reference

Dharminder Chauhan, Ajita V. Singh, Monette Aujay, Christopher J. Kirk, Madhavi Bandi, Bryan Ciccarelli, Noopur Raje, Paul Richardson, and Kenneth C. Anderson. A novel oraaly active proteasome inhibitor ONX 0912 triggers in vitro and in vivo cytotoxicity in multiple myeloma. Blood 2010; 116(23): 4906-4915

Product Citation

1. T. Ukmar-Godec, P. Fang, et al. "Proteasomal degradation of the intrinsically disordered protein tau at single-residue resolution." Sci Adv. 2020 Jul 22;6(30):eaba3916. PMID:32832664
2. Felix Lambrecht. "Computational methods for the structure determination of highly dynamic molecular machines by cryo-EM." Georg-August-Universit?t G?ttingen. 2019.
3. McCourt JL, Talsness DM, et al. "Mouse models of two missense mutations in actin-binding domain 1 of dystrophin associated with Duchenne or Becker muscular dystrophy." Hum Mol Genet. 2018 Feb 1;27(3):451-462. PMID:29194514
4. Haselbach D, Schrader J, et al. "Long-range allosteric regulation of the human 26S proteasome by 20S proteasome-targeting cancer drugs." Nat Commun. 2017 May 25;8:15578. PMID:28541292
5. Schrader J, Henneberg F, et al. "The inhibition mechanism of human 20S proteasomes enables next-generation inhibitor design." Science. 2016 Aug 5;353(6299):594-8. PMID:27493187
6. Vandewynckel YP, Coucke C, et al. "Next-generation proteasome inhibitor oprozomib synergizes with modulators of the unfolded protein response to suppress hepatocellular carcinoma."Oncotarget. 2016 Jun 7;7(23):34988-5000. PMID:27167000

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Chemical Properties

Physical Appearance	A solid
Storage	Desiccate at -20°C
M.Wt	532.61
Cas No.	935888-69-0
Formula	C₂₅H₃₂N₄O₇S
Synonyms	ONX-0912,ONX0912,ONX 0912,PR 047,Oprozomib
Solubility	≥26.6 mg/mL in DMSO; insoluble in H2O; ≥2.77 mg/mL in EtOH with gentle warming and ultrasonic
Chemical Name	N-[(2S)-3-methoxy-1-[[(2S)-3-methoxy-1-[[(2S)-1-[(2R)-2-methyloxiran-2-yl]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxopropan-2-yl]amino]-1-oxopropan-2-yl]-2-methyl-1,3-thiazole-5-carboxamide
SDF	Download SDF
Canonical SMILES	CC1=NC=C(S1)C(=O)NC(COC)C(=O)NC(COC)C(=O)NC(CC2=CC=CC=C2)C(=O)C3(CO3)C
Shipping Condition	Small Molecules with Blue Ice, Modified Nucleotides with Dry Ice.
General tips	We do not recommend long-term storage for the solution, please use it up soon.

Protocol

Cell experiment:
Cell lines	The human HNSCC cell lines UMSCC-22A, UMSCC-22B, 1483, UMSCC-1, and Cal33.
Preparation method	The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while.Stock solution can be stored below -20°C for several months.
Reaction Conditions	48 h; IC50 values ranging from 58.9 to185.7 nmol/L in 8 different HNSCC cell lines.
Applications	In trypan blue exclusion assays, ONX 0912 exhibited IC50 values ranging from 58.9 to185.7 nmol/L in 8 different HNSCC cell lines. In the 4 HNSCC cell lines (UMSCC-1, UMSCC-22B, 1483, and UMSCC-1) examined, treatment ONX 0912 resulted in processing of caspase-3 to active subunits and cleavage of the caspase substrate PARP.
Animal experiment:
Animal models	Athymic nude mice
Dosage form	30 mg/kg; Oral taken.
Applications	Using nude mice harboring HNSCC xenograft tumors, oral administration of 30 mg/kg ONX 0912 effectively inhibited CT-L activity in normal and HNSCC tumor tissues. Treatments (10 mg/kg and 30 mg/kg) were administered via oral gavage once a day on 2 consecutive days and repeated weekly for 2 weeks. Treatment with 10 mg/kg ONX 0912 did not have a significant effect on tumor growth, relative to treatment with vehicle alone. In contrast, highly significant inhibition of HNSCC tumor growth was seen with 30 mg/kg ONX 0912 (P = 0.003). These results show that consecutive-day treatment with orally administered ONX 0912, using a dose that has previously been shown to be well tolerated, leads to inhibition of HNSCC tumor growth.
Other notes	Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.
References: [1] Zang Y, Thomas S M, Chan E T, et al. Carfilzomib and ONX 0912 inhibit cell survival and tumor growth of head and neck cancer and their activities are enhanced by suppression of Mcl-1 or autophagy[J]. Clinical Cancer Research, 2012, 18(20): 5639-5649.

Biological Activity

Description	Oprozomib (ONX 0912) is an orally bioavailable inhibitor for CT-L activity of 20S proteasome β5 and LMP7 with IC50 values of 36 nM and 82 nM, respectively.
Targets	20S proteasome β5	20S proteasome LMP7
IC50	36 nM	82 nM