化合物PF543 T6085

Product Introduction
Bioactivity


英文名: PF-543

描述: PF-543 (Sphingosine Kinase 1 Inhibitor II) 是一种选择性可逆和鞘氨醇竞争性 SPHK1抑制剂，可诱导细胞凋亡、坏死和自噬。它对 SPHK1的选择性是 SPHK2 的 100 倍以上。它还抑制全血中 1-磷酸鞘氨醇形成，IC50为 26.7 nM。

细胞实验: CellTiter-Glo Assay (Only for Reference)

激酶实验: FITC-S1P quantification/Caliper assay: A 384-well format of the SphK enzyme assay based on separation of FITC-S1P from unreacted FITC-sphingosine substrate using a microfluidic capillary electrophoresis mobility-shift system is developed. Briefly, 3 nM SphK1–His6 is incubated with 1 μM FITC-sphingosine, 20 μM ATP and 10 μM compound (a final concentration of DMSO of 2 %) in a buffer containing 100 mM Hepes (pH 7.4), 1 mM MgCl2,0.01% Triton X-100, 10% glycerol, 100 μM sodium orthovanadate and 1 mM DTT for 1 h in a 384-well Matrical MP-101-1-PP plate. Reaction mixtures (10 μL) are quenched by the addition of 20 μL of 30 mM EDTA and 0.15% Coating Reagent-3 in 100 mM Hepes, and a small aliquot of each reaction (a few nanolitres) is analysed in the Caliper LabChip 3000 instrument under -1.5 psi (psi=6.9 kPa) pressure, a downstream voltage of -1900 V and a sip time of 0.2 s. Phosphorylated fluorescent product and unphosphorylated fluorescent substrate appeared as distinctive peaks and are quantified using the Caliper data.

体外活性: PF543 is a cell-permeable hydroxyl methylpyrrolidine compound that inhibits SphK-1/SphK1-catalyzed sphingosine phosphorylation in a reversible and sphingosine-competitive manner, exhibiting no affinity toward S1P receptors and much reduced inhibitory activity against Sphk2 (6.8% inhibition at 10 μM) or 46 other lipid and portein kinases (IC50 >10 μM). In the SphK1-overexpression 1483 head and neck carcinoma cells, PF-543 decreases the level of endogenous S1P 10-fold with a proportional increase in the level of sphingosine. PF-543 binds SphK1 reversibly (k off t1/2=8.5 min) and with high affinity and the binding constant (Kd) is 5 nM. PF543 had no effect on the proliferation and survival of 1483, A549, LN229, Jurkat, U937 and MCF-7 cells, despite a dramatic change in the cellular S1P/sphingosine ratio. PF-543 is effective as a potent inhibitor of S1P formation in whole blood, indicating that the SphK1 isoform of sphingosine kinase is the major source of S1P in human blood. [1]

体内活性: Administration of the potent sphingosine kinase 1 inhibitor, PF-543 in a mouse hypoxic model of pulmonary hypertension has no effect on vascular remodelling but reduces right ventricular hypertrophy. Administration of 10 mg/kg PF-543 for 24 h to mice induces a decrease in SK1 expression in pulmonary vessels[2].

存储条件: Powder: -20°C for 3 years | In solvent: -80°C for 1 year

溶解度: H2O : <1 mg/mL
DMSO : 93 mg/mL (199.74 mM)
Ethanol : 93 mg/mL (199.74 mM)


关键字: anti-inflammatory | Inhibitor | inhibit | S1P | Autophagy | SK1 | Lysophospholipid Receptor | LPL Receptor | SphK | Apoptosis | PF543 | caspase-3/7 | necrosis | PF-543 | Sphingosine kinase | anti-cancer | Nrf-2 | sphingosine-competitive | PAH

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注：该产品未在中华人民共和国食品药品监督管理部门申请医疗器械注册和备案，不可用于临床诊断或治疗等相关用途