Delanzomib

SKU: orb1301139

Description

Delanzomib (CEP-18770) is a potent and selective oral proteasome inhibitor, targeting the chymotrypsin-like activity with an IC50 of 3.8 nM while sparing other proteasomal activities. It has demonstrated anti-tumor efficacy in preclinical models of multiple myeloma and solid tumors, supporting its investigation in both in vitro and in vivo cancer research.

Research Area

Cell Biology, Protein Biochemistry, Signal Transduction

Key Properties

• CAS Number: 847499-27-8
• MW: 413.28
• Purity: 99.46% (May vary between batches)
• Formula: C₂₁H₂₈BN₃O₅
• SMILES: CC(C)C[C@H](NC(=O)[C@@H](NC(=O)c1cccc(n1)-c1ccccc1)[C@@H](C)O)B(O)O
• Target: NF-κB,Apoptosis,Proteasome
• Solubility: 10% DMSO+40% PEG300+5% Tween 80+45% Saline:2 mg/mL (4.84 mM);H2O:< 1 mg/mL (insoluble or slightly soluble);DMSO:77 mg/mL (186.31 mM);Ethanol:77 mg/mL (186.31 mM)

Bioactivity

• Target IC50:
  Chymotrypsin-like proteasome:3.8 nM
• In Vivo:
  CEP-18770 reveals sustained dose-related relative tumor weight inhibition. CEP-18770 leads to dose-related complete tumor regressions, as compared to bortezomib treatment, which results in a 50% incidence of CR at its maximally tolerated dose (MTD) of 1.2 mg/kg intravenously. In contrast to bortezomib, CEP-18770 reveals dose-related increase in the incidence of tumor-free mice by the completion of these studies (120 days after tumor transplantation). Oral administration of CEP-18770 produces a marked decrease in tumor weight and notable dose-related incidence of complete tumor regression with minimal changes in animal body weight over the course of the 120 day studies. When compared to bortezomib, equiactive doses of CEP-18770 reveal a greater and more sustained dose-related inhibition of tumor proteasome activity, corresponding temporarily with maximum induction of caspase-3 and 7 activity. The maximum apoptotic signal is 2.5 fold greater for CEP-18770 versus bortezomib. In contrast, proteasome inhibition profiles of CEP-18870 and bortezomib are comparable in the normal peripheral mouse tissues examined (liver, lungs, whole blood, and brain [no activity]) in both their magnitude and their duration. No proteasome inhibition is detected in brain tissue at any time point for either CEP-18770 or bortezomib. In MM xenograft models, the addition of CEP-18770 to melphalan completely preventes the growth of both melphalan-sensitive or melphalan-resistant tumours. The combination of CEP-18770 and bortezomib leads to complete regression of bortezomib-sensitive tumours and markedly delays progression of bortezomib-resistant tumours compared to treatment with either agent alone. Single agent CEP-18770 PO also shows marked anti-MM effects in these xenograft models
• In Vitro:
  CEP-18770 demonstrates marginal prevention of the tryptic and peptidyl gultamyl activities of the protesome. The IC50 values of CEP-18770 are similar to those of bortezomib, with the chymotryptic and caspase-like activities being inhibited at low-nanomolar concentrations. CEP-18770 inhibits A2780 ovarian cancer cells, PC3 prostate cancer, H460, LoVo colon cancer, RPMI8226 multiple myeloma cancer and HS-Sultan anaplastic non-Hodgkin lymphoma with IC50 values of 13.7, 22.2, 34.2 11.3, 5.6 and 8.2 nM, respectively. CEP-18770 blocks the ubiquitin-proteasome pathway in several MM and in the chronic myelogenous leukemia cell line, K562. CEP-18770 causes an accumulation of ubiquitinated proteins over 4 to 8 hours with a profile similar to that observed after bortezomib treatment. IκBα degradation is completely blocked by pretreatment with CEP-18770. CEP-18770 significantly inhibits high levels of NF-κB activity in both RPMI-8226 and U266 cells. The time- and concentration-dependent suppression of NF-kB DNA-binding activity in MM cell lines by CEP-18770 leads to a decrease of expression of several NF-κB-modulated genes mediating the growth and survival of tumor cells including IkBα itself, the X-chromosome-linked inhibitor-of-apoptosis protein (XIAP), the pro-inflammatory cytokines TNF-α and interleukin-1β (IL-1β), the intracellular adhesion molecule (ICAM1), and the pro-angiogeneic factor vascular endothelial growth factor. The expression of these NF-κB–mediated genes and their modulation by bortezomib are associated with more favorable Clinicalal responsiveness to this agent, highlighting their potential prognostic value in response to CEP-18770 exposure.
• Cell Research:
  HMEC and TEC cells are seeded into 24-well plates at a density of 104 cells/well in DMEM supplemented with 5% FCS. After incubation with proteasome inhibitors (48 hours), cells are washed, air dried, and stained with crystal violet as described. Cell number is determined, in duplicate samples, on the basis of a standard curve obtained with known cell numbers. All experiments are performed in triplicate. In vitro formation of capillary-like structures is studied on cells (4 × 104 cells/well in DMEM supplemented with 5% FCS. After incubation with proteasome inhibitors (48 hours), cells are washed (cells/well in 24-well plates) and seeded onto Matrigel-coated wells in DMEM containing 0.25% BSA. HMEC and TEC cells (5 × 103 per well), suspended in 200 μL DMEM with 5% FCS (positive control), serum-free medium (negative control), are layered onto the Matrigel surface in the presence or absence of proteasome inhibitor CEP-18770. Cells are observed with a inverted microscope and experimental results are then recorded after a 6-hour incubation at 37 °C. Data is analyzed, as the mean (× 1 SD) of total length of capillary-like structures, by the Micro-Image system and is expressed as mm/field by the computer analysis system in 5 different fields at 100 × magnification in duplicated wells for 4 different experiments. (Only for Reference)

Storage & Handling

• Storage: Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature.
• Expiration Date: 12 months from date of receipt.
• Disclaimer: For research use only

Alternative Names

CEP18770, CEP-18770, CEP 18770, Chymotrypsin-like proteasome, chymotrypsin-like, Delanzomib, anti-cancer, antiangiogenic, Apoptosis, inhibit, Inhibitor, NFkB, NF-kB, Nuclear factor-κB, Nuclear factor-kappaB, NF-κB, NFκB, Proteasome

Compound Identifiers

PubChem CID

24800541