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

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）

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K_m系数（3），再除以大鼠的K_m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。