SB-505124 塩酸塩 水和物

外観

白色～うすい黄色～うすい黄赤色粉末～結晶

説明

SB-505124 inhibits the TGF-β1 receptor serine/threonine kinase ALK5 with an IC₅₀ value of 47 nM. Though it is a less potent antagonist of ALK4 (IC₅₀ = 129 nM) and ALK7, SB-505124 selectively and concentration-dependently inhibits ALK4-, ALK5-, and ALK7-dependent activation of downstream SMAD2 and SMAD3 and TGF-β–induced MAP kinase pathway components without altering ALK1-3 or ALK6-induced SMAD signaling. In an assay determining in vitro phosphorylation of SMAD3, SB-505124 is more potent than SB-431452 with IC₅₀ values of 47 versus 94 nM, respectively.

使用

SB-505124 is a selective inhibitor of transforming growth factor-beta type I receptor ALK5 and as well as being a selective inhibitor of ALK4 but with less potency. SB-505124 blocks TGF-β–induced apoptosis of FaO cells and NRP 154 cells in a concentration-dependent manner. SB-505124 has been shown to suppress the migration and invasion of breast cancer MCF-7-M5 cells.

Biochem/physiol Actions

SB-505124 selectively inhibits TGF-β type I receptors, activin receptor-like kinases (ALK) 4, 5 and 7. It inhibits ALK4-, 5- and 7-mediated activation of Smad2, Smad3 and MAPK pathway induced by TGF-β.1 SB-505124 inhibits the human fibroblast trans-differentiation induced by the co-culture with Esophageal squamous cell carcinoma.2