A2614-1ml | Bortezomib (PS-341) [179324-69-7] Biotrend

Background

Bortezomib (originally codenamed PS-341) is the first therapeutic proteasome inhibitor to the tested in humans. It is approved in the U.S. for treating relapsed multiple myeloma and mantle cell lymphoma. [1] The drug is an N-protected dipeptide and can be written as Pyz-Phe-boroLeu, which stands for pyrazinoic acid, phenylalanine and Leucine with a boronic acid instead of a carboxylic acid. Peptides are written N-terminus to C-terminus, and this convention is used here even though the "C-terminus" is a boronic acid instead of a carboxylic acid. While multiple mechanisms are likely to be involved, proteasome inhibition may prevent degradation of pro-apoptotic factors, permitting activation of programmed cell death in neoplastic cells dependent upon suppression of pro-apoptotic pathways. Recently, it was found that bortezomib caused a rapid and dramatic change in the levels of intracellular peptides that are produced by the proteasome. [2] Some intracellular peptides have been shown to be biologically active, and so the effect of bortezomib on the levels of intracellular peptides may contribute to the biological and/or side effects of the drug.

A potent (Ki = 0.6 nM), specific and reversible proteasome inhibitor. It inhibits cell proliferation of H460 cells (Human non-small cell lung cancer cell lines) with an IC₅₀ of 0.1 µM.

References:
1. Takimoto CH, Calvo E. "Principles of Oncologic Pharmacotherapy" in Pazdur R, Wagman LD, Camphausen KA, Hoskins WJ (Eds) Cancer Management: A Multidisciplinary Approach. 11 ed. 2008.
2. Gelman JS, Sironi J, Berezniuk I, Dasgupta S, Castro LM, Gozzo FC, Ferro ES, Fricker LD (2013). "Alterations of the intracellular peptidome in response to the proteasome inhibitor bortezomib". In Gartel, Andrei L. PLoS One 8 (8): e53263.

Product Citation

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3. Rachel Sharninghausen, Jiwon Hwang, et al. "Identification of ERAD-dependent degrons for the endoplasmic reticulum lumen." bioRxiv. June 22, 2023.
4. Nuria Vilaboa, Juan Antonio Lopez, et al. "Disruption of Proteostasis by Natural Products and Synthetic Compounds That Induce Pervasive Unfolding of Proteins: Therapeutic Implications." Pharmaceuticals (Basel). 2023 Apr 19;16(4):616. PMID: 37111374
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7. Mikhail S. Chesnokov, Marianna Halasi, et al. "Novel FOXM1 inhibitor identified via gene network analysis induces autophagic FOXM1 degradation to overcome chemoresistance of human cancer cells." Cell Death Dis. 2021 Jul 14;12(7):704. PMID:34262016
8. Qi Zhu, Xu-xu Zhuang, et al. "Lycorine, a natural alkaloid, promotes the degradation of alpha-synuclein via PKA-mediated UPS activation in transgenic Parkinson's disease models." Phytomedicine. 2021 Jul;87:153578. PMID:34038839
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11. Dana Mamriev, Ruqaia Abbas, et al. "A small-molecule ARTS mimetic promotes apoptosis through degradation of both XIAP and Bcl-2." Cell Death Dis. 2020 Jun 25;11(6):483. PMID:32587235
12. Haiyang Yu, Shan Lu, et al. "TDP-43 and HSP70 phase separate into anisotropic, intranuclear liquid spherical annuli." bioRxiv. March 29, 2020.
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Chemical Properties

Physical Appearance	A solid
Storage	Store at -20°C
M.Wt	384.24
Cas No.	179324-69-7
Formula	C₁₉H₂₅BN₄O₄
Synonyms	Bortezomib,PS-341,LDP-341,MLM341,MG-341,NSC-681239
Solubility	insoluble in EtOH; insoluble in H2O; ≥19.21 mg/mL in DMSO
Chemical Name	[(1R)-3-methyl-1-[[(2S)-3-phenyl-2-(pyrazine-2-carbonylamino)propanoyl]amino]butyl]boronic acid
SDF	Download SDF
Canonical SMILES	B(C(CC(C)C)NC(=O)C(CC1=CC=CC=C1)NC(=O)C2=NC=CN=C2)(O)O
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 [1]:
Cell lines	Canine malignant melanoma cell lines (CMM-1, CMM-2, ChMC, KMeC, LMeC, OMJ, OMS, OMK, and NML
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	72h; IC50=3.5~5.6 nM (nine kinds of cells)
Applications	Bortezomib potently suppressed the growth in 21 drugs, while other compounds had no or minimal effect on cell growth. We thus focused on bortezomib and examined its growth inhibitory properties against nine canine malignant melanoma cell lines (CMM-1, CMM-2, ChMC, KMeC, LMeC, OMJ, OMS, OMK, and NML). Bortezomib inhibited the growth of all cell lines with calculated IC50 values of 3.5~5.6 nM.
Animal experiment [1]:
Animal models	Nude athymic mice
Dosage form	0.8 mg/kg; intravenous injection
Applications	The in vivo growth inhibitory activity of bortezomib against CMM-1 cells was evaluated using a xenograft mouse model. Bortezomib significantly suppressed the growth of tumours after Day 4 of treatment (P < 0.01, control vs. bortezomib). Tumours from the bortezomib-treated mice showed a significant decrease in mitotic index compared to controls (P
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] Ito K, Kobayashi M, Kuroki S, et al. The proteasome inhibitor bortezomib inhibits the growth of canine malignant melanoma cells in vitro and in vivo[J]. The Veterinary Journal, 2013, 198(3): 577-582.

Biological Activity

Description	Bortezomib (PS-341) is a potent inhibitor of 20S proteasome with Ki of 0.6 nM.
Targets	20S proteasome
IC50	0.6 nM (K_i)

Bortezomib (PS-341) [179324-69-7]

Katalog-Nummer A2614-1ml

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