生物活性
CYT997 (Lexibulin)作用于癌细胞系,是一种有效的microtubule(微管)聚合抑制剂,IC50为10-100 nM。CYT997(1 μM)处理A549细胞24小时,诱导微管快速重组,包括现有的微管网络遭破坏,及一些细胞质微管蛋白在菌斑处累积,导致细胞形态发生显著变化,包括粘附细胞丢失,细胞减少。CYT997作用于16种癌细胞具有毒性,IC50为作用于HepG2细胞的9 nM到作用于 KHOS/NP细胞的101 nM。CYT997有效作用于HCT15细胞, 具有多耐药机制Pgp(MDR+), IC50为52 nM。
化学数据
分子量 | 434.53 |
分子式 | C24H30N6O2 |
CAS号 | 917111-44-5 |
纯度 | >98% |
溶解性(25°C) | DMSO 77 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 |
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细胞系 | DU145, A549, Ramos, KHOS/NP, A375, HCT-15, HT1376, BT-20, A431, PA-1, U937, HepG2, TF-1, Baf3/TelJAK2, PC3, and K562 |
方法 | Exposing the cells to various concentrations of CYT997 for ~72 hours. Assessing cell proliferation with either the Alamar blue or MTT assays. For MTT assays, adding 5 mg/mL of MTT to all wells, incubating plates for 6 hours at 37 °C, and then adding lysis buffer (10% SDS in 0.01 N HCl) and measuring absorbance at 620 nm in a BMG Technologies Lumistar or Polarstar plate reader. For Alamar blue assays, adding Alamar blue (10 μL/well) to each well and incubating the plates at 37 °C for 4 hours. Then measureing the fluorescence using a fluorescence plate reader with an excitation filter at 544 nm and an emission filter at 590 nm. For cell cycle analysis, cells are fixed and permeabilized with 70% ethanol in PBS and incubated at 4 °C overnight. RNase-treated samples (10 μg RNase/mL for 20 minutes at 37 °C) are stained with propidium iodide (5 μg/mL) at 4 °C for a minimum of 10 minutes. Cell cycle variables are determined by fluorescence-activated cell sorting (FACS) analysis using a Beckman-Coulter Quanta SC MPL system and analyzed using CXP Software. For apoptosis analysis, cells are detached and collected. Using the Vybrant Apoptosis Assay Kit to do Annexin staining . Storing cells on ice and analyzing on a Beckman Coulter Quanta MPL within 1 hour of preparation. Using two-channel analysis to determine Annexin V–positive cells . |
浓度 | Dissolved in DMSO, final concentrations ~1 μM |
处理时间 | ~72 hours |
动物实验 |
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动物模型 | Male nude mice inoculated s.c. with PC3 cells, and female BALB/c mice inoculated with 4T1 cells |
配制 | Formulated in NMP/PEG300/saline |
剂量 | ~30 mg/kg/day |
给药处理 | Oral gavage thrice a day |
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 |
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1 mM | 2.3013 mL | 11.5067 mL | 23.0134 mL |
5 mM | 0.4603 mL | 2.3013 mL | 4.6027 mL |
10 mM | 0.2301 mL | 1.1507 mL | 2.3013 mL |