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Begacestat
γ-分泌酶抑制剂,Begacestat (GSI-953) 是淀粉样前体蛋白 γ 分泌酶 (gamma-secretase) 的选择性噻吩磺酰胺抑制剂 (IC50Aβ40=15 nM),用于阿尔兹海默症的治疗。
目录号: PC15679 纯度: ≥98%
CAS No. :769169-27-9
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中文名称
Begacestat
中文别名
(S)-5-氯-N-(4,4,4-三氟-1-羟基-3-(三氟甲基)-2-丁基)噻吩-2-磺酰胺;脱乙酰头孢匹林钠盐
英文名称
Begacestat
英文别名
2-Thiophenesulfonamide,5-chloro-N-[(1S)-3,3,3-trifluoro-1-(hydroxymethyl)-2-(trifluoromethyl)propyl]-;GSI-953;5-chloro-N-[(2S)-4,4,4-trifluoro-1-hydroxy-3-(trifluoromethyl)butan-2-yl]thiophene-2-sulfonamide;BEGACESTAT;UNII-3666C56BBU;5-Chloro-N-[(1S)-3,3,3-trifluoro-1-(hydroxymethyl)-2- (trifluoromethyl)propyl] thiophene-2-sulfonamide
Cas No.
769169-27-9
分子式
C9H8NO3F6S2Cl
分子量
391.74
包装储存
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
生物活性

Begacestat (GSI-953) is a selective thiophene sulfonamide inhibitor of amyloid precursor protein gamma-secretase (IC5040=15 nM) for the treatment of Alzheimers disease.

性状

Solid

IC50 & Target[1][2]

IC50: 15 nM (Aβ40).

体内研究(In Vivo)

Begacestat (5 mg/kg, p.o. in mice) treatment for 4 h significantly reduces the Aβ40 and Aβ42 in brain (37% lowering of brain Aβ40 and 25% lowering of Aβ40 observed).
Begacestat (GSI-953: 0, 2.5, 5, or 10 mg/kg, oral gavage, 3 h) results in a dose-dependent reversal of contextual fear conditioning deficits when compound is orally administered 3 h before training. Significant deficits are observed after treatment with 2.5 mg/kg Begacestat, and there is some reversal of this at 5 mg/kg and full reversal at 10 mg/kg compared with vehicle-dosed Tg2576 mice.
A dosage-related trend of slightly lower percentages of SP CD4+ cells in males at all dosages (SP CD4+ cells=~11% in controls compared with ~7% to ~9% in Begacestat-dosed animals) and females at 2000 mg/kg/day (SP CD4+ cells=~10% in controls compared with ~8% in Begacestat-dosed animals) is observed.

Medlife has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Tg2576 mice
Dosage: 0, 2.5, 5, or 10 mg/kg
Administration: Oral gavage for two consecutive days
Result: Resulted in a dose-dependent reversal of contextual fear conditioning deficits when compound is orally administered 3 h before training.
Animal Model: Sprague-Dawley rats
Dosage: 0, 200, 600, or 2000 mg/kg/day for 10 (5 males/group and 5 females at 600 mg/kg/day) or 28 (10/sex/group) consecutive days
Administration: P.O. for 10 (5 males/group and 5 females at 600 mg/kg/day) or 28 (10/sex/group) consecutive days.
Result: A dosage-related trend of slightly lower percentages of SP CD4+ cells in males at all dosages and females at 2000 mg/kg/day was observed.
运输条件

Room temperature or refrigerated transportation.

储存方式
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
ClinicalTrial
参考文献
溶解度数据
体外研究: 

DMSO : 50 mg/mL (127.64 mM; Need ultrasonic)

配制储备溶液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 2.5527 mL 12.7636 mL 25.5271 mL
5 mM 0.5105 mL 2.5527 mL 5.1054 mL
10 mM 0.2553 mL 1.2764 mL 2.5527 mL
*

产品不同,其溶解度不同。建议根据产品选择合适的溶剂配制储备溶液;配成溶液后,建议分装保存,避免反复冻融造成的产品失效
储备液的保存方式和期限:-80°C, 6 months; -20°C, 1 month。-80°C 储存时,建议在 6 个月内使用,-20°C 储存时,建议在 1 个月内使用。

体内研究:

建议根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都建议先按照 体外研究 方式配制澄清的储备液,再依次添加助溶剂:

——为保证实验结果的可靠性,澄清的储备液可以根据储存条件,适当保存;体内实验的工作液,建议您现用现配,当天使用; 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比;如在配制过程中出现沉淀、析出现象,可以通过加热和/或超声的方式助溶

  • 1.

    建议依照次序添加每种溶剂: 10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.5 mg/mL (6.38 mM); Clear solution

    此方案可获得 ≥ 2.5 mg/mL (6.38 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;向上述体系中加入50 μL Tween-80,混合均匀;然后继续加入 450 μL生理盐水定容至 1 mL。

    将 0.9 g 氯化钠,完全溶解于 100 mL ddH?O 中,得到澄清透明的生理盐水溶液
  • 2.

    建议依照次序添加每种溶剂: 10% DMSO    90% (20% SBE-β-CD in saline)

    Solubility: ≥ 2.5 mg/mL (6.38 mM); Clear solution

    此方案可获得 ≥ 2.5 mg/mL (6.38 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中,混合均匀。

    将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中,再用生理盐水定容至 10 mL,完全溶解,澄清透明
  • 3.

    建议依照次序添加每种溶剂: 10% DMSO    90% corn oil

    Solubility: ≥ 2.5 mg/mL (6.38 mM); Clear solution

    此方案可获得 ≥ 2.5 mg/mL (6.38 mM,饱和度未知) 的澄清溶液,此方案不适用于实验周期在半个月以上的实验。

    以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中,混合均匀。

*
搜索质检报告(COA)

1:一般建议:溶解度为Medlife测试数据,可能与文献描述存在差异。这是由于生产工艺和批次不同产生的正常现象。为了使其更好的溶解,请用37℃加热试管并在超声波水浴中震动片刻。不同批次产品溶解度各有差异,仅做参考,具体以实验方案为准。

2:储存条件:粉末-20°C一般情况可以保存3年,溶于溶剂-80°C一般情况可以保存1年。不同产品及不同批次产品可能存在差异,请细致阅读产品信息,并辅助参考相关文献描述。

The molarity calculator equation
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
The dilution calculator equation
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2