Carfilzomib (PR-171)

Carfilzomib (PR-171) is an irreversible proteasome inhibitor with IC50 of <5 nM, displayed preferential in vitro inhibitory potency against the ChT-L activity in the β5 subunit, but little or no effect on the PGPH and T-L activities.

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Carfilzomib (PR-171) Chemical Structure

Carfilzomib (PR-171) Chemical Structure
Molecular Weight: 719.91

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Customer Reviews(2)

Quality Control & MSDS

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Carfilzomib (PR-171) is available in the following compound libraries:

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Product Description

Biological Activity

Description Carfilzomib (PR-171) is an irreversible proteasome inhibitor with IC50 of <5 nM, displayed preferential in vitro inhibitory potency against the ChT-L activity in the β5 subunit, but little or no effect on the PGPH and T-L activities.
Targets Proteasome [1]
IC50 5 nM
In vitro Carfilzomib inhibits proliferation in a variety of cell lines and patient-derived neoplastic cells, including multiple myeloma, and induced intrinsic and extrinsic apoptotic signaling pathways and activation of c-Jun-N-terminal kinase (JNK). Carfilzomib reveals enhanced anti-MM activity compared with bortezomib, overcome resistance to bortezomib and other agents, and acts synergistically with dexamethasone (Dex). Carfilzomib shoes preferential in vitro inhibitory potency against the ChT-L activity in the β5 subunit, with over 80% inhibition at doses of 10 nM. Short exposure to low-dose Carfilzomib leads to preferential binding specificity for the β5 constitutive 20S proteasome and the β5i immunoproteasome subunits. Measurement of caspase activity in ANBL-6 cells pulsed with Carfilzomib reveals substantial increases in caspase-8, caspase-9, and caspase-3 activity after 8 hours, giving a 3.2-, 3.9- and 6.9-fold increase, respectively, over control cells after 8 hours. In carfilzomib pulse-treated cells, the mitochondrial membrane integrity is decreased to 41% (Q1 + Q2), compared with 75% in vehicle-treated control cells. [1] In another study, Carfilzomib has also shown preclinical effectiveness against hematological and solid malignancies. [2] Carfilzomib directly inhibits osteoclasts formation and bone resorption. [3]
In vivo Carfilzomib moderately reduces tumor growth in an in vivo xenograft model. Carfilzomib effectively decreases multiple myeloma cell viability following continual or transient treatment mimicking. Carfilzomib increases trabecular bone volume, decreases bone resorption and enhances bone formation in non-tumor bearing mice. [3]
Features

Protocol(Only for Reference)

Kinase Assay: [1]

Enzyme-linked immunosorbent assay for subunit profiling of carfilzomib ANBL-6 cells (2 × 106/well) are plated in 96-well plates and treated with Carfilzomib doses from 0.001 to 10 μM for 1 hour. Cells are then lysed (20 mM Tris-HCl, 0.5 mM EDTA), and cleared lysates are transferred to polymerase chain reaction (PCR) plates. A standard curve is generated using untreated ANBL-6 cell lysates starting at a concentration of 6 μg protein/μL. The active site probe [biotin-(CH2)4-Leu-Leu-Leu-epoxyketone; 20 μM] is added and incubated at room temperature for 1 hour. Cell lysates are then denatured by adding 1% sodium dodecyl sulfate (SDS) and heating to 100°C, followed by mixing with 20 μL per well streptavidin-sepharose high-performance beads in a 96-well multiscreen DV plate and incubated for 1 hour. These beads are then washed with enzyme-linked immunosorbent assay (ELISA) buffer (PBS, 1% bovine serum albumin, and 0.1% Tween-20), and incubated overnight at 4°C on a plate shaker with antibodies to proteasome subunits. Antibodies used included mouse monoclonal anti-β1, anti-β2, anti-β1i, and anti-β5i, goat polyclonal anti-β2i, and rabbit polyclonal anti-β5 (affinity-purified antiserum against KLH-CWIRVSSDNVADLHDKYS peptide). The beads are washed and incubated for 2 hours with horseradish peroxidase-conjugated secondary goat antirabbit, goat antimouse or rabbit antigoat antibodies. After washing, the beads are developed using the supersignal ELISA picochemiluminescence substrate. Luminescent detection is performed. Raw luminescence is converted to μg/mL by comparison with the standard curve and expressed as the % inhibition relative to vehicle control. Curve fits are generated using the following nonsigmoidal dose-response equation: Y = Bottom + (Top-Bottom)/(1 + 10̂((LogEC50 − X) × HillSlope)), where X is the logarithm of concentration, Y is the % inhibition, and EC50 is the dose showing 50% effect.

Cell Assay: [1]

Cell lines WST-1, ANBL-6 cells
Concentrations 100 nM
Incubation Time 1 hour
Method WST-1 is used to determine the effects of proteasome inhibitor Carfilzomib on cell proliferation. The inhibition of proliferation is calculated in relation to parallel control cells that receives vehicle alone. A linear spline function is used to interpolate the median inhibitory concentration (IC50) using XLfit 4 software. The degree of resistance (DOR) is calculated using the formula: DOR = IC50(resistant cells)/IC50(sensitive cells). ANBL-6 cells pulsed with 100 nM carfilzomib are washed and suspended in PBS containing 5 μg/mL of JC-1, which exhibits potential-dependent accumulation in mitochondria. Analysis of the mitochondrial membrane potential-dependent color shift from 525 to 590 nm is carried out on a FacScan, and the data are analyzed with CellQuest software.

Animal Study: [4]

Animal Models Beige-nude-XID mice
Formulation 10% sulfobutylether β-cyclodextrin in 10 mmol/L citrate buffer pH 3.5,
Dosages 2.0 mg/kg
Administration i.v.
Solubility 15% Captisol/citrate vehicle, , 30 mg/mL
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesBaboonDogMonkeyRabbitGuinea pigRatHamsterMouse
Weight (kg)121031.80.40.150.080.02
Body Surface Area (m2)0.60.50.240.150.050.0250.020.007
Km factor202012128653
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)
1

References

[1] Kuhn DJ, et al. Blood. 2007, 110(9), 3281-3290.

[2] Kuhn DJ, et al. Curr Cancer Drug Targets. 2011, 11(3), 285-295.

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Clinical Trial Information( data from http://clinicaltrials.gov, updated on 2014-09-13)

NCT Number Recruitment Conditions Sponsor
/Collaborators
Start Date Phases
NCT02101944 Not yet recruiting Refractory Multiple Myeloma National Cancer Institute (NCI) November 2014 --
NCT02235740 Not yet recruiting Cancer GlaxoSmithKline|Onyx Pharmaceuticals October 2014 Phase 1
NCT02203643 Not yet recruiting MULTIPLE MYELOMA (MM) University of Turin, Italy|Guido Tarone September 2014 Phase 2
NCT02114502 Withdrawn Myeloma M.D. Anderson Cancer Center September 2014 Phase 2
NCT02217163 Not yet recruiting Multiple Myeloma Singapore General Hospital September 2014 Phase 2

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Chemical Information

Download Carfilzomib (PR-171) SDF
Molecular Weight (MW) 719.91
Formula

C40H57N5O7

CAS No. 868540-17-4
Storage 3 years -20℃Powder
6 months-80℃in DMSO
Synonyms
Solubility (25°C) * In vitro DMSO 50 mg/mL (69 mM)
Water <1 mg/mL (<1 mM)
Ethanol <1 mg/mL (<1 mM)
In vivo 15% Captisol/citrate vehicle, 30 mg/mL
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Name L-Phenylalaninamide, (αS)-α-[[2-(4-morpholinyl)acetyl]amino]benzenebutanoyl-L-leucyl-N-[(1S)-3-methyl-1-[[(2R)-2-methyl-2-oxiranyl]carbonyl]butyl]-

Research Area

Customer Reviews (2)


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Rating
Source Cancer Res, 2014, 16. Carfilzomib (PR-171) purchased from Selleck
Method Western blot
Cell Lines MM.1S cells
Concentrations 10 nM
Incubation Time 24 h
Results CHOP expression was induced by carfilzomib indicating ER stress, which was enhanced by TAS-117 and associated with enhanced PARP cleavage.

Click to enlarge
Rating
Source J Virol, 2013, 87(23):13035-41. Carfilzomib (PR-171) purchased from Selleck
Method Flow cytometry
Cell Lines HeLa cells
Concentrations 1 uM
Incubation Time 24 h
Results The Carfilzomib enhanced the fluorescence of Hela cells, obviously.

Product Citations (3)

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