生物活性
Ex26 is a peripherally-restricted biphenylcarboxamide derivative that acts as a highly potent and subtype-selective S1P1 antagonist (IC50= 0.93 nM against S1PR1 and >3.1 μM against S1PR2/3/4/5). Ex26 significantly elevates CpG-A-stimulated interferon (IFN) production in plasmacytoid dendritic cell culture (10 μM) and prevents S1P1 agonist-induced S1P1 receptor internalization and polyubiquitinylation in HEK cells (0.1-1,000 nM). Ex26 induces lymphocyte sequestration (ED50= 0.06 mg/kg, i.p.) in lymph nodes and pulmonary edema (2 hr post 30 mg/kg i.p.) in mice, leading to the inhibition of lymphocyte and thymocyte egress (0.1 mg/kg/hr continuously for 3 days after a loading dose of 3 mg/kg). Ex26 has been shown to ameliorate experimental autoimmune encephalomyelitis (EAE) in a mouse MS model and elevate CpG-A-stimulated serum IFN upregulation in micein vivo(30 mg/kg/d, i.p.).
化学数据
| 分子量 | 494.98 |
| 分子式 | C28H28ClFN2O3 |
| CAS号 | 1233332-37-0 |
| 纯度 | >98% |
| 溶解性（25°C） | DMSO: 25 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 |
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 | 2.0203 mL | 10.1014 mL | 20.2028 mL |
| 5 mM | 0.4041 mL | 2.0203 mL | 4.0406 mL |
| 10 mM | 0.202 mL | 1.0101 mL | 2.0203 mL |
