446859-33-2

RepSox (446859-33-2) is a potent (IC50?ALK5 auto-P= 4 nM; IC50?TGF-β cellular assay = 23 nM) inhibitor of the TGF-β type I receptor (ALK5).1?RepSox can replace Sox2 in reprogramming adult cells into pluripotent stem cells via induction of Nanog transcription.2?It was able to convert astrocytes into neuronal cells as part of a small molecule cocktail (along with valproic acid and CHIR99021).3,4

Alk 5 Inhibitor II is a selective ATP competitive inhibitor of transforming growth factor-β (TGFβ). A potential drug for the treatment of fibrosis and cancer.

ChEBI: 1,5-naphthyridine, 2-[3-(6-methyl-2-pyridinyl)-1h-pyrazol-4-yl]- is a pyrazolopyridine.

Cell permeable, potent, selective and ATP-competitive inhibitor of TGF-β RI kinase (IC50=23nM, 4nM and 18nM for binding, auto-phosphorylation and cellular assay in HepG2 cells of TGF-β RI kinase, respectively). Minimally affects a panel of 9 closely related kinases including p38 MAPK (IC50>16μM).

RepSox Inhibits TGF-beta receptor signaling. Retroviral transduction of Sox2, Oct4, and Klf4 genes results in direct reprogramming of somatic cells into induced pluripotent stem cells (iPSCs).

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1) Gellibert?et al. (2004),?Identification of 1,5-Naphthyridine Derivatives as a Novel Series of Potent and Selective TGF-β Type I Receptor Inhibitors; J. Med. Chem.?47?4494 2) Ichida?et al.?(2009),?A Small-molecule Inhibitor of TGF-β Signaling Replaces Sox2 in Reprogramming by Inducing Nanog; Cell Stem Cell?5?491 3) Cheng?et al.?(2015),?Direct Conversion of astrocytes into neuronal cells by a drug cocktail;?Cell Res.?25?1269 4) Cheng?et al.?(2014),?Generation of neural progenitor cells by chemical cocktails and hypoxia; Cell Res.?24?665