fty720p

FTY720 (S)-Phosphate 是 FTY720 的活性磷酸化对映异构体，是一种强效的鞘氨醇-1-磷酸（S1P）受体调节剂。其可与 S1P₁、S1P₃、S1P₄ 和 S1P₅ 受体亚型结合，Ki 值分别为 2.1、5.9、23 与 2.2 nM，并可诱导淋巴细胞受体内化，阻止 S1P 介导的淋巴细胞外流。FTY720 (S)-Phosphate 还能增强内皮屏障完整性，促进 Abcb1 与 Abcc1 等转运体活性，并抑制胞质磷脂酶 A2 活性，展现多重药理特性，是多发性硬化、自身免疫疾病及癌症研究中的关键分子。

FTY720 (S)-Phosphate，作为S1P受体1 (S1PR1) 激动剂，可用于研究急性肺损伤等急性炎症。

FTY720, an immune modulator, down-regulates sphingosine-1-phosphate (S1P) receptors, enhances the activity of sphingosine transporter Abcb1 and leukotriene C4 transporter Abcc1, and inhibits cytosolic phospholipase A2 activity. Its efficacy relies on in vivo phosphorylation by sphingosine kinases, resulting in FTY720-phosphate which also down-regulates S1P receptors. NBD-FTY720, a fluorescently-labeled analog of FTY720, retains the hydroxy methyl side chain targeted for phosphorylation, suggesting potential phosphorylation in vivo.