Stemolecule ALK5 Inhibitor, also known as RepSox, E 616452, and SJN 2511, is a selective and ATP-competitive inhibitor of the TGFβ family type I receptor activin receptor-like kinase (ALK5)1. The ALK5 Inhibitor works by preventing autophosphorylation of ALK5. It has also been shown that ALK5 can replace Sox2 when reprogramming cells to induced pluripotent stem (iPS) cells. Through inhibition of the TGFβ pathway, ALK5 works to reprogram cells that have been transduced with Oct4, Klf4, and c-Myc2. ALK5 Inhibitor promotes the differentiation of MYH11-positive cells by modulating NOTCH signaling4.
Stemolecule ALK5 Inhibitor (RepSox)
Greater than 99% by HPLC analysis
For a 10 mM concentrated stock solution of ALK5 Inhibitor, reconstitute the compound by adding 348 µL of DMSO to the entire contents of the vial. If precipitate is observed, warm the solution to 37 °C for 2 to 5 minutes. For cell culture, the media should be prewarmed prior to adding the reconstituted compound. Note: for most cells, the maximum tolerance to DMSO is less than 0.5%. This molecule is soluble in DMSO at 100 mM and methanol at 17 mM.
Storage and Stability
Store powder at 4 °C or lower, protected from light. Information about the stability of Stemolecules in solution is largely not available. As a general guideline, we recommend that stock solution be freshly made and stored in aliquots at −20 °C. The effect of storage of stock solutions should be verified for each application.
The purity of ALK5 Inhibitor was determined by HPLC analysis. The accurate mass was determined by mass spectrometry. Cellular toxicity of ALK5 Inhibitor was tested on HeLa and HEK293 cells.