Molecular Weight(MW): 509
Belnacasan (VX-765) is a potent and selective inhibitor of caspase-1 with Ki of 0.8 nM in a cell-free assay. Phase 2.
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BMMs were treated as above for 1 h. Cell lysates, as well as cell culture supernatants, were analyzed by western blot for cleavage of caspase-1. Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) served as loading control.
Mucosal Immunol, 2015, 10.1038/mi.2015.44. Belnacasan (VX-765) purchased from Selleck.
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2. For more details, such as half maximal inhibitory concentrations (IC50s) and working concentrations of each inhibitor, please click on the link of the inhibitor of interest.
3. "+" indicates inhibitory effect. Increased inhibition is marked by a higher "+" designation.
4. Orange "√" refers to compounds which do inhibitory effects on the related isoform, but without specific value.
|Description||Belnacasan (VX-765) is a potent and selective inhibitor of caspase-1 with Ki of 0.8 nM in a cell-free assay. Phase 2.|
|Features||A potent and selective inhibitor of interleukin-converting enzyme/caspase-1.|
VX-765 is an orally absorbed prodrug of VRT-043198, which exhibits potent inhibition against ICE/caspase-1 and caspase-4 with Ki of 0.8 nM and less than 0.6 nM, respectively. And VRT-043198 also inhibits IL-1β release from both PBMCs and whole blood with IC50 of 0.67 μM and 1.9 μM, respectively. 
|In vivo||In collagen-induced arthritis mouse model, VX-765 (200 mg/kg) inhibits LPS-induced IL-1β production by about 60%, and results in a dose-dependent, statistically significant reduction in the inflammation scores and effective protection from joint changes.  In vivo, VX-765 blocks kindling epileptogenesis in rats by preventing IL-1β increase in forebrain astrocytes without significant effect on afterdischarge duration.  In the mouse model of acute seizures, VX-765 (50 mg/kg-200 mg/kg) produces the anticonvulsant effect by delaying the time to onset of the first seizure and decreasing the number of seizures as well as their total duration by average 50% and 64%.  In adult rats with genetic absence epilepsy (GAERS), VX-765, after the 3rd drug injection, significantly reduces the cumulative duration and number of spike-and-wave discharges (SWDs) by 55% on average by selectively blocking IL-1β biosynthesis. |
|In vitro||DMSO||100 mg/mL (196.46 mM) warming|
|Ethanol||100 mg/mL warmed (196.46 mM)|
|In vivo||2% DMSO+30% PEG 300+ddH2O||5mg/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.
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
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Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
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Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT01501383||Terminated||Epilepsy||Vertex Pharmaceuticals Incorporated||December 2011||Phase 2|
|NCT01048255||Completed||Partial Epilepsy||Vertex Pharmaceuticals Incorporated||January 2010||Phase 2|
|NCT00205465||Completed||Psoriasis||Vertex Pharmaceuticals Incorporated||December 2004||Phase 2|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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Frequently Asked Questions
The recommended dose of VX-765 is 100mg/kg p.o. in 25% cremophor EL in water. Is VX0765 directly soluble at 10mg/ml in 25% cremophor in water? How to formulate it for in vivo use in mice?
You can prepare 25% cremophor EL in water first and then directly resuspend VX-765 powder in the vehicle. The powder may not be fully dissolved, but the suspension is stable and can be used for gavage feeding.