生物活性
Milciclib (PHA-848125)是一种有效的，ATP竞争性CDK抑制剂，作用于CDK2，IC50为45 nM，作用于CDK2比作用于CDK1， 2， 4， 5和7选择性高3倍以上。PHA-848125有效抑制细胞周期蛋白(cyclin)A/CDK2, IC50为45 nM，PHA-84812为ATP竞争性抑制剂。PHA-848125也抑制cyclin H/CDK7,cyclin D1/CDK4,p35/CDK5,cyclin E/CDK2，及cyclin B/CDK1活性，IC50 分别为of 0.15, 0.16, 0.265, 0.363, 0.398 μM。PHA-848125作用于大部分对PHA-848125敏感的细胞系时，诱导细胞周期停在G1期，这种抑制存在浓度依赖性。
化学数据
| 分子量 | 460.57 |
| 分子式 | C25H32N8O |
| CAS号 | 802539-81-7 |
| 纯度 | >98% |
| 溶解性（25°C） | DMSO 90 mg/mL |
| 储存和运输条件 | 固体粉末： -20°C 冷藏长期储存
常温运输及临时存放 |
实验操作 来自于公开的文献，仅供相同实验参考（如实验材料、目的不同，请参考其他文献）
| 细胞实验 |
|---|
| 细胞系 | Melanoma cells |
| 方法 | Suspending melanoma cells in culture media at a concentration of 2 × 104cells/mL, dispensing in 50 μL aliquots into flat-bottom 96-well plates and allowed to adhere overnight at 37 °C. Then adding Graded amounts of PHA-848125 or TMZ to the wells (4 wells per point) in 50 μL of CM and incubating the plates at 37 °C in a 5% CO2 humidified atmosphere for 5 days. The cytotoxic effects of TMZ are also evaluated in combination with the MGMT inhibitor BG. To this end, adding 10 μM BG to the plates 2 hours before TMZ and left in culture for the entire period of cell exposure to the drug. ContS1017rol groups are represented by untreated cells and cells treated with BG or DMSO alone. The growth of the cells treated with BG or DMSO alone does not differ from that of untreated cells. MGMT activity of BG-treated cells is undetectable 2 hours after the addition of the inhibitor PHA-848125 and remained essentially undetectable up to the end of the assay. Normal melanocytes are suspended in MGM at the concentration of 1.6 × 105cells/mL, plated (50 μL/well) and exposed to TMZ + BG or to PHA-848125 as described for melanoma cells. At the end of the incubation period, using the MTT assay to evaluate cell growth . Briefly, 0.1 mg of MTT (in 20 μL of PBS) is added to each well and cells are incubated at 37 °C for 4 hours. Cells are then lysed with a buffer (0.1 mL/well) containing 20% SDS and 50% N,N-dimethylformamide, pH 4.7. After overnight incubation, the absorbance is read at 595 nm using a 3550-UV microplate reader. Cell sensitivity to drug treatment is expressed in terms of IC50 (drug concentration producing 50% inhibition of cell growth, calculated on the regression line in which absorbance values at 595 nm are plotted against the logarithm of drug concentration). |
| 浓度 | 5.7 mg/mL |
| 处理时间 | 2 hours |
| 动物实验 |
|---|
| 动物模型 | K-Ras(G12D)LA2 mice |
| 配制 | 5% dextrose solution |
| 剂量 | 40 mg/kg twice daily for 10 days |
| 给药处理 | Oral administration |
不同实验动物依据体表面积的等效剂量转换表（数据来源于FDA指南）
| 小鼠 | 大鼠 | 兔 | 豚鼠 | 仓鼠 | 狗 |
| 重量 (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| 体表面积 (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km系数 | 3 | 6 | 12 | 8 | 5 | 20 |
| 动物 A (mg/kg) = 动物 B (mg/kg) × | 动物 B的Km系数 |
| 动物 A的Km系数 |
例如，依据体表面积折算法，将化合物用于小鼠的剂量20 mg/kg 换算成大鼠的剂量，需要将20 mg/kg 乘以小鼠的Km系数（3），再除以大鼠的Km系数（6），得到化合物用于大鼠的等效剂量为10 mg/kg。
储备液配制
以下数据基于产品分子量，对于特殊产品，请参照COA中的储备液配制条件和说明进行操作。
| Concentration / Solvent Volume / Mass | 1 mg | 5 mg | 10 mg |
|---|
| 1 mM | 2.1712 mL | 10.8561 mL | 21.7122 mL |
| 5 mM | 0.4342 mL | 2.1712 mL | 4.3424 mL |
| 10 mM | 0.2171 mL | 1.0856 mL | 2.1712 mL |
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