Belnacasan (VX-765) 化学構造
分子量: 509

品質と確認

Quality Control & MSDS

製品情報

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  • 研究分野

製品の説明

生物活性

情報 Belnacasan (VX-765)は、0.8nMのKiによるインターロイキン変換酵素/カスパーゼ-1の強力で選択的な阻害剤です。
目標 Caspase-1
IC50 0.8 nM (Ki) [1]
In vitro試験 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. [1]
In vivo試験 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. [1] In vivo, VX-765 blocks kindling epileptogenesis in rats by preventing IL-1β increase in forebrain astrocytes without significant effect on afterdischarge duration. [2] 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%. [3] 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. [4]
臨床試験 VX-765 is currently in Phase II clinical trials in patients with treatment-resistant partial epilepsy.
特集 A potent and selective inhibitor of interleukin-converting enzyme/caspase-1.

推薦された実験操作 (公開の文献だけ)

キナーゼアッセイ: [1]

Protease Enzyme Assays Enzyme inhibition is assayed by tracking of the rate of hydrolysis of an appropriate substrate labeled with either p-nitroaniline or aminomethyl coumarin (AMC) as follows: ICE/caspase-1, suc-YVAD-p-nitroanilide; caspase-4, Ac-WEHD-AMC; caspase-6, Ac-VEID-AMC; caspase-3, -7, -8, and -9, Ac-DEVD-AMC; and granzyme B, Ac-IEPD-AMC. Enzymes and substrates are incubated in a reaction buffer [10 mM Tris, pH 7.5, 0.1% (w/v) CHAPS, 1 mM dithiothreitol, and 5% (v/v) dimethyl sulfoxide] for 10 minutes at 37 °C. Glycerol is added to the buffer at 8% (v/v) for caspase-3, -6, and -9 and granzyme B to improve stability of enzymes. The rate of substrate hydrolysis is monitored using a fluorometer

動物実験: [1]

動物モデル Collagen-induced arthritis mouse model.
製剤 VX-765 is dissolved in 25% Cremophor EL.
投薬量 ≤200 mg/kg
管理 Administered via p.o.

Conversion of different model animals based on BSA

SpeciesWeight (kg)Body Surface Area (m2)Km factor
Baboon120.620
Dog100.520
Monkey30.2412
Rabbit1.80.1512
Guinea pig0.40.058
Rat0.150.0256
Hamster0.080.025
Mouse0.020.0073
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

Value based on data from FDA Draft Guidelines: Center for Drug Evaluation and Research, Center for Biologics Evaluation and Research. (2002) Estimating the safe starting dose in clinical trials for therapeutics in adult healthy volunteers, U.S. Food and Drug Administration, Rockville, Maryland, USA.

For example, to convert the dose of resveratrol used in a mouse (22.4 mg/kg) to a dose based on surface area for 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

参考

化学情報

Download Belnacasan (VX-765) SDF Download Belnacasan (VX-765) SDF
分子量 509
化学式

C24H33ClN4O6

CAS No. 273404-37-8, 851091-96-8
保管 2年-20℃
6月-80℃in DMSO
別名 N/A
溶解度 (25°C) * In vitro DMSO 100 mg/mL (196 mM)
<1 mg/mL (<1 mM)
エタノール 100 mg/mL (196 mM)
* <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.
化学名 (S)-1-((S)-2-(4-amino-3-chlorobenzamido)-3,3-dimethylbutanoyl)-N-((2R,3S)-2-ethoxy-5-oxo-tetrahydrofuran-3-yl)pyrrolidine-2-carboxamide

研究分野

技術サポート&よくある質問(FAQ)

顧客がするかもしれない質問に対する答えは、指示を取り扱っている阻害剤で見つかります。話題は、貯蔵液(阻害剤と特別な注意を細胞ベースの分析法と動物のために必要とする問題を保存することは実験します)を準備する方法を含みます。

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