5.04314

Bortezomib

≥98% (LC/MS), solid, 20S proteasome inhibitor, Calbiochem^®

• Synonym(s): Bortezomib, (R)-3-Methyl-1-((S)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butylboronic acid, BTZ, LDP-341, LDP341, MG341, MLN-341, MLN341, PS341, Proteasome Inhibitor XXII, PS-341, MG-341, Pyz-Phe-boroLeu, BTZ, LDP-341, LDP341, MG341, MLN-341, MLN341, PS341, Proteasome Inhibitor XXII, PS-341, MG-341, Pyz-Phe-boroLeu, (R)-3-Methyl-1-((S)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butylboronic acid
• Empirical Formula (Hill Notation): C₁₉H₂₅BN₄O₄
• CAS Number: 179324-69-7
• Molecular Weight: 384.24
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• product name: Bortezomib,
• Assay: ≥98% (LC/MS)
• Quality Level: 100
• form: solid
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze; desiccated (hygroscopic); protect from light
• color: off-white
• solubility: DMSO: 100 mg/mL; ethanol: 2 mg/mL (with sonication)
• storage temp.: −20°C
• InChI: 1S/C19H25BN4O4/c1-13(2)10-17(20(27)28)24-18(25)15(11-14-6-4-3-5-7-14)23-19(26)16-12-21-8-9-22-16/h3-9,12-13,15,17,27-28H,10-11H2,1-2H3,(H,23,26)(H,24,25)/t15-,17-/m0/s1
• InChI key: GXJABQQUPOEUTA-RDJZCZTQSA-N

Description

General description

Bortezomib, a cell-permeable dipeptidylboronate compound, is a proteasome inhibitor. The proteasomal system is crucial for cellular protein turnover, which is necessary for maintaining cell homeostasis. Bortezomib binds reversibly to the chymotrypsin-like subunit of the 26S proteasome, inhibiting its function and thereby preventing the degradation of multiple pro-apoptotic factors. Bortezomib selectively inhibits 20S proteasome β5 ChTL/chymotrypsin- over β1 CL/caspase- and β2 TL/trypsin-like activity (kinact/Ki = 38,000, 5,700, and <100 M-1s-1, respectively, in human 20S proteasome assays using 10 M Suc-LLVY-AMC/Cat. No. 539142, 10 M Z-LLE-AMC/Cat. No. 539141, or 50 M Boc-LRR-AMC as substrate; IC50 in 1 h = 7, 74, and 4,200 nM, respectively) via a covalent, slowly reversible, interaction between the nucleophilic Thr1 hydroxy group/Thr1Oγ of the catalytic β subunit and the inhibitor′s electrophilic boronic moiety, displaying much reduced potency against human chymotrypsin, cathepsin G, leukocyte elastase, and thrombin (Ki = 0.32, 0.63, 2.3, and 13 M, respectively, vs. 620 nM using rabbit muscle 20S). A widely used inhibitor both in cultures in vitro and in animals in vivo. Despite being the first proteasome inhibitor approved by FDA for clinical anticancer treatment, its therapeutic efficacy continues to be hampered by off-target effects and dose-limiting toxicity.

Application

Bortezomib has been used to induce aerobic glycolysis/ neuropathic pain in mice and study chemotherapy-induced painful peripheral neuropathy.

Biochem/physiol Actions

Cell permeable: yes

Reversible: yes

Features and Benefits

• Cell permeable and enables targeted action
• Allows reversible modulation of cellular processes

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Preparation Note

Use only fresh DMSO or Ethanol for reconstitution.

Reconstitution

Following reconstitution, aliquot and freeze (-20°C.) Stock solutions are stable for up to 6 months at -20°C.

Other Notes

Du, X.L, and Chen, Q. 2013. Acta Haematol.129, 207.
Tamatani, T., et al. 2013. Int. J. Oncol.42, 935.
Beck, P., et al. 2012. J. Biol. Chem.393, 1101.
Fang, H.T., et al. 2012. Proc. Natl. Acad. Sci. USA.109, 2521.
Chen, D., et al. 2011. Curr. Cancer Drug Targets11, 239.
Demo, S.D., et al. 2007. Cancer Res.67, 6383.
Adams, J., et al. 1999. Cancer Res.59, 2615.
Teicher, B.A., et al. 1999. Clin. Cancer Res.5, 2638.
Adams, J., et al. 1998. Bioorg. Med. Chem. Lett.8, 333.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable