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PR-924

Alias: PR924; PR-924; PR-924
Cat No.:V28561 Purity: ≥98%
PR-924 is a selective inhibitor of the tripeptide epoxyketone immunoprotease subunit LMP-7 with IC50 of 22 nM.
PR-924
PR-924 Chemical Structure CAS No.: 1416709-79-9
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
PR-924 is a selective inhibitor of the tripeptide epoxyketone immunoprotease subunit LMP-7 with IC50 of 22 nM. PR-924 covalently modifies the N-terminal threonine active site of the proteasome. PR-924 inhibits cell growth and triggers apoptosis in multiple myeloma cells, and has anti-tumor activity.
Biological Activity I Assay Protocols (From Reference)
ln Vitro
Viability is inhibited in MM cell lines in a time- and dose-dependent manner (IC 50 range for PR-924 (1-20 μM; 24-72 hours; MM.1S, MM.1R, RPMI-8226, KMS12, LR-5, DOX40, INA-6, OPM1, and OPM2 cells) treatment significantly reduced
ln Vivo
In human plasmacytoma xenografts, PR-924 (6 mg/kg; i.v.; twice weekly; for 21 days; CB-17 SCID mice) therapy significantly reduces tumor growth [1]. In the SCID-hu model, PR-924 therapy dramatically lowered shIL-6R levels. PR-924 treatment can increase the longevity of tumor-bearing animals [1].
Cell Assay
Cell Viability Assay[1]
Cell Types: MM.1S, MM.1R, RPMI-8226, KMS12, LR-5, DOX40, INA-6, OPM1 and OPM2 Cell
Tested Concentrations: 1-20 μM
Incubation Duration: 24 hrs (hours), 48 Hourly and 72 hour
Experimental Results: Dramatically diminished viability of all MM cell lines in a time- and dose-dependent manner (IC 50 range for
Cell Types: 3-7 μM for 48 hrs (hours)).

Apoptosis analysis[1]
Cell Types: MM.1S and MM.1R Cell
Tested Concentrations: 3 μM
Incubation Duration: 48 hrs (hours)
Experimental Results: A significant increase in the annexin V+/PI-apoptotic cell population was triggered.

Western Blot Analysis [1]
Cell Types: MM.1S and MM.1R Cell
Tested Concentrations: 3 μM
Incubation Duration: 48 hrs (hours)
Experimental Results: Triggers the activation of caspase-3, caspase-8 and caspase-9, and Dramatically downregulates the expression of Bcl- 2 egg whites.
Animal Protocol
Animal/Disease Models: CB-17 SCID (severe combined immunodeficient) mouse injected with MM.1S cells [1]
Doses: 6 mg/kg
Route of Administration: intravenous (iv) (iv)injection; twice weekly; for 21 days
Experimental Results: Inhibition of human plasmacytoma xenografts of tumor growth.
References

[1]. PR-924, a selective inhibitor of the immunoproteasome subunit LMP-7, blocks multiple myeloma cell growth both in vitro and in vivo. Br J Haematol. 2011 Jan;152(2):155-63.

[2]. Carfilzomib can induce tumor cell death through selective inhibition of the chymotrypsin-like activity of the proteasome. Blood. 2009 Oct 15;114(16):3439-47.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C37H38N4O5
Molecular Weight
618.73
Exact Mass
618.284
CAS #
1416709-79-9
Related CAS #
(R)-PR-924
PubChem CID
92135659
Appearance
Off-white to light yellow solid powder
Density
1.3±0.1 g/cm3
Boiling Point
969.0±65.0 °C at 760 mmHg
Flash Point
539.8±34.3 °C
Vapour Pressure
0.0±0.3 mmHg at 25°C
Index of Refraction
1.648
LogP
6.17
Hydrogen Bond Donor Count
4
Hydrogen Bond Acceptor Count
5
Rotatable Bond Count
12
Heavy Atom Count
46
Complexity
1200
Defined Atom Stereocenter Count
4
SMILES
CC1=C(CC2=CC=CC=C12)C(=O)N[C@H](C)C(=O)N[C@@H](CC3=CNC4=CC=CC=C43)C(=O)N[C@@H](CC5=CC=CC=C5)C(=O)[C@]6(CO6)C
InChi Key
ADBUEVSHEJICCM-LZNHGOJSSA-N
InChi Code
InChI=1S/C37H38N4O5/c1-22-27-14-8-7-13-25(27)18-29(22)35(44)39-23(2)34(43)41-32(19-26-20-38-30-16-10-9-15-28(26)30)36(45)40-31(33(42)37(3)21-46-37)17-24-11-5-4-6-12-24/h4-16,20,23,31-32,38H,17-19,21H2,1-3H3,(H,39,44)(H,40,45)(H,41,43)/t23-,31+,32+,37-/m1/s1
Chemical Name
N-[(2R)-1-[[(2S)-3-(1H-indol-3-yl)-1-[[(2S)-1-[(2R)-2-methyloxiran-2-yl]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxopropan-2-yl]amino]-1-oxopropan-2-yl]-3-methyl-1H-indene-2-carboxamide
Synonyms
PR924; PR-924; PR-924
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO : ~50 mg/mL (~80.81 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (4.04 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (4.04 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.6162 mL 8.0811 mL 16.1621 mL
5 mM 0.3232 mL 1.6162 mL 3.2324 mL
10 mM 0.1616 mL 0.8081 mL 1.6162 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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