Cayman Chemical Item Number 13123

MLS 2052; ​GSK3 Inhibitor IX; 6-Bromoindirubin-3'-oxime (CAS 667463-62-9)

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BIO is a cell-permeable bis-indolo (indirubin) compound that acts as a highly potent, selective, reversible, and ATP-competitive inhibitor of GSK3α/β (IC50 = 5 nM). 1,2 Its specificity has been tested against various cyclin-dependent kinases (CDKs) (IC50s = 83, 300, 320, and 10,000 nM for Cdk5/p25, Cdk2/A, Cdk1/B, and Cdk4/D1, respectively). BIO was also tested for its specificity towards many other commonly studied kinases (IC50 ≥10 µM), including MAP kinases, PKA, PKC isoforms, PKG, CK, and IRTK. 1,2 Inhibition of GSK by BIO has been shown to result in the activation of the Wnt signaling pathway and sustained pluripotency in human and mouse embryonic stem cells (ESCs).3 BIO is reported to maintain self-renewal in human and mouse ESCs as well as induce the differentiation of neonatal cardiomyocytes.4

1. Meijer, L., Skaltsounis, A., Magiatis, P., et al. GSK-3-selective inhibitors derived from tyrian purple indirubins. Chem Biol 10 1255-1266 (2003).

2. Polychronopoulos, P., Magiatis, P., Skaltsounis, A., et al. Structural basis for the synthesis of indirubins as potent and selective inhibitors of glycogen synthase kinase-3 and cyclin-dependent kinases. J Med Chem 47 935-946 (2004).

3. Sato, N., Meijer, L., Skaltsounis, L., et al. Maintenance of pluripotency in human and mouse embryonic stem cells through activation of Wnt signaling by a pharmacological GSK-3-specific inhibitor. Nat Med 10(1) 55-63 (2004).

4. Tseng, A., Engel, F.B., and Keating, M.T. The GSK-3 inhibitor BIO promotes proliferation in mammalian cardiomyocytes. Chem Biol 13 957-963 (2006).

  • MLS 2052
  • ​GSK3 Inhibitor IX
  • 6-Bromoindirubin-3'-oxime
Formal Name 6-​bromo-​3-​[(3E)-​1,​3-​dihydro-​3-​(hydroxyimino)-​2H-​indol-​2-​ylidene]-​1,​3-​dihydro-​(3Z)-​2H-​indol-​2-​one
CAS Number 667463-62-9
Molecular Formula C16H10BrN3O2
Formula Weight 356.2
Formulation A crystalline solid
Purity ≥98%
λmax 224, 254, 281, 291, 330, 344, 503 nm
Stability 2 years
Storage -20°C
Shipping Room temperature in continental US; may vary elsewhere
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Size Price Quantity Subtotal
1 mg $25.00 $0.00
5 mg $99.00 $0.00
10 mg $138.00 $0.00
25 mg $313.00 $0.00
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Cart Total $0.00

Pricing updated 2015-07-30. Prices are subject to change without notice.

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