Ribociclib (LEE011) 是一种高度特异性的

Ribociclib  (Synonyms: 瑞博西尼; LEE011)

Ribociclib (LEE011) 是一种高度特异性的 CDK4/6 抑制剂，IC₅₀ 值分别为 10 nM 和 39 nM，对 cyclin B/CDK1 复合体的活性低于其 1000 倍。

生物活性    
Ribociclib (LEE01) is a highly specific CDK4/6 inhibitor with IC50 values of 10 nM and 39 nM, respectively, and is over 1,000-fold less potent against the cyclin B/CDK1 complex[1].

体外研究
Treating a panel of 17 neuroblastoma cell lines with Ribociclib (LEE011) across a four-log dose range (10 to 10,000 nM). Treatment with Ribociclib significantly inhibits substrate adherent growth relative to the control in 12 of the 17 neuroblastoma cell lines examined (mean IC50=306±68 nM, considering sensitive lines only, where sensitivity is defined as an IC50 of less than 1 μM. Ribociclib treatment of two neuroblastoma cell lines (BE2C and IMR5) with demonstrated sensitivity to CDK4/6 inhibition results in a dose-dependent accumulation of cells in the G0/G1 phase of the cell cycle. This G0/G1 arrest becomes significant at Ribociclib concentrations of 100 nM (p=0.007) and 250 nM (p=0.01), respectively[2].

体内研究
CB17 immunodeficient mice bearing BE2C, NB-1643 (MYCN amplified, sensitive in vitro), or EBC1 (non-amplified, resistant in vitro) xenografts are treated once daily for 21 days with Ribociclib (LEE011; 200 mg/kg) or with a vehicle control. This dosing strategy is well tolerated, as no weight loss or other signs of toxicity are observed in any of the xenograft models. Tumor growth is significantly delayed throughout the 21 days of treatment in mice harboring the BE2C or 1643 xenografts (both, p<0.0001), although growth resumed post-treatment[2].

分子量    
434.54

性状    
Solid

Formula    
C23H30N8O

CAS 号    
1211441-98-3

中文名称    
瑞博西尼；瑞柏司可里布

运输条件    
Room temperature in continental US; may vary elsewhere.

储存方式    
Powder    -20°C    3 years
4°C    2 years
In solvent    -80°C    6 months
-20°C    1 month
溶解性数据    
In Vitro: 
DMSO : 12.5 mg/mL (28.77 mM; ultrasonic and warming and heat to 60°C)

配制储备液    
浓度溶剂体积质量    1 mg    5 mg    10 mg
1 mM    2.3013 mL    11.5064 mL    23.0128 mL
5 mM    0.4603 mL    2.3013 mL    4.6026 mL
10 mM    0.2301 mL    1.1506 mL    2.3013 mL
*
请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，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，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

In Vivo:
请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 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.
请依序添加每种溶剂： 5% DMSO    40% PEG300    5% Tween-80    50% saline

Solubility: ≥ 1 mg/mL (2.30 mM); Clear solution

2.
请依序添加每种溶剂： 5% DMSO    95% (20% SBE-β-CD in saline)

Solubility: ≥ 1 mg/mL (2.30 mM); Clear solution

3.
请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% saline

Solubility: ≥ 0.89 mg/mL (2.05 mM); Clear solution

4.
请依序添加每种溶剂： 10% DMSO    90% (20% SBE-β-CD in saline)

Solubility: ≥ 0.89 mg/mL (2.05 mM); Clear solution

5.
请依序添加每种溶剂： 10% DMSO    90% corn oil

Solubility: ≥ 0.89 mg/mL (2.05 mM); Clear solution

 

参考文献	[1]. VanArsdale T, et al. Molecular Pathways: Targeting the Cyclin D-CDK4/6 Axis for Cancer Treatment. Clin Cancer Res. 2015 Jul 1;21(13):2905-10.  [Content Brief] [2]. Rader J, et al. Dual CDK4/CDK6 Inhibition Induces Cell-Cycle Arrest and Senescence in Neuroblastoma. Clin Cancer Res. 2013 Nov 15;19(22):6173-82.  [Content Brief]