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LY364947

Activin/BMP/TGF-ß pathway inhibitor; Inhibits ALK5

STEMCELL Technologies Inc.

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LY364947 is a selective inhibitor of the TGFβ/Activin/NODAL pathway that inhibits ALK5 (IC₅₀ = 59 nM)(Sawyer et al.). LY364947 less effectively inhibits TGFβRII (IC₅₀ = 400 nM), p38 MAPK (IC₅₀ = 740 nM), and mixed lineage kinase-7 (MLK-7; IC₅₀ = 1,400 nM) (Li et al., 2006; Sawyer et al.).

REPROGRAMMING

  • In combination with valproic acid, can replace SOX2 in reprogramming of mouse embryonic fibroblasts transduced with OCT4, KLF4 and c-MYC (Ichida et al.).

DIFFERENTIATION

  • Blocks chondrogenesis induced by mechanical load in human mesenchymal stem cells (Li et al., 2010).
  • Restores the hematopoietic potential of mouse para-aortic splanchnopleural cells deficient for the Evi-1 transcription factor (Sato et al.).
  • Impairs definitive endoderm differentiation competence in human embryonic stem (ES) cells (Jaremko et al.).
  • Blocks TGF-β-induced endothelial-to-mesenchymal transition of NMuMg mammary epithelial cells or mouse ES cell-derived endothelial cells (Peng et al.; Kokudo et al.).

CANCER RESEARCH

  • Suppresses colony-forming ability of mouse and human leukemia-initiating cells cultured with OP-9 stromal cells, and, when combined with imatinib, reduces lethality in a mouse model of chronic myeloid leukemia (Naka et al.).
  • Reduces invasiveness of MDA-MB-231 breast cancer cells in a matrigel invasion assay (Shiou et al.).

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