ITD-1 is the first selective TGFβ receptor inhibitor with an IC50 of 460 nM.
IC50&Target
IC50: 460 nM (TGFβ receptor)
体外研究
ITD-1 potently blocks phosphorylation of the effector SMAD2/3 proteins induced by TGFβ2, and only minimally in response to Activin A. HEK293T cells are transfected with a Smad4 response element driving luciferase (SBE4-Luc) to test whether ITD-1 blocks Activin A/Nodal and/or TGFβ signaling, which utilize the same intracellular signaling cascade through Smad4. ITD-1 strongly inhibits TGFβ2 signaling with similar efficacy (92% vs. 99% respectively), but with lower potency compared to SB-431542, an ACVR1B/TGFBR1 kinase inhibitor (IC50= 850nM vs. 70nM respectively), and is a weak and partial inhibitor of Activin A signals. ITD-1 selectively enhances the differentiation of uncommitted mesoderm to cardiomyocytes, but not to vascular smooth muscle and endothelial cells. ITD-1 reveals an unexpected role for TGFβ signaling in controlling cardiomyocyte differentiation from multipotent cardiovascular precursors.
分子式
C27H29NO3
分子量
415.52
CAS号
1099644-42-4
运输条件
Room temperature in continental US; may vary elsewhere.
储存方式
Powder
-20°C
3 years
4°C
2 years
In solvent
-80°C
6 months
-20°C
1 month
溶解性数据
In Vitro:
DMSO : 28 mg/mL (67.39 mM; Need ultrasonic and warming)