Catalog No.S7198 Synonyms: GSK-3 Inhibitor IX, 6-bromoindirubin-3-oxime

BIO Chemical Structure

Molecular Weight(MW): 356.17

BIO is a specific inhibitor of GSK-3 with IC50 of 5 nM for GSK-3α/β in a cell-free assay, shows >16-fold selectivity over CDK5, also a pan-JAK inhibitor.

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1 Customer Review

  • Lysates of HCT116p53KO cells were harvested 24 hs after treatment with different GSK3 inhibitors and GSK3A/B activation/inactivation checked by western blot: a mix of pSer21-GSK3A and pSer9-GSK3B antibodies and antibody cross-reacting with both pTyr279-GSK3A and pTyr216-GSK3B were used to assess the specificity of the inhibitor for GSK3A. BIO: 6-bromoindirubin-3'-oxime, TWS: TWS119, SB2: SB216763, SB4: SB415286.

    PLoS One 2014 9(7), e100947. BIO purchased from Selleck.

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2. For more details, such as half maximal inhibitory concentrations (IC50s) and working concentrations of each inhibitor, please click on the link of the inhibitor of interest.
3. "+" indicates inhibitory effect. Increased inhibition is marked by a higher "+" designation.
4. Orange "√" refers to compounds which do inhibitory effects on the related isoform, but without specific value.

Biological Activity

Description BIO is a specific inhibitor of GSK-3 with IC50 of 5 nM for GSK-3α/β in a cell-free assay, shows >16-fold selectivity over CDK5, also a pan-JAK inhibitor.
Features The first pharmacological agent shown to maintain self-renewal in human and mouse embryonic stem cells.
GSK-3 [1]
(Cell-free assay)
TYK2 [4]
(Cell-free assay)
CDK5/p35 [1]
(Cell-free assay)
CDK2/CyclinA [1]
(Cell-free assay)
CDK1/CyclinB [1]
(Cell-free assay)
5 nM 30 nM 0.08 μM 0.30 μM 0.32 μM
In vitro

BIO (6-bromoindirubin-3'-oxime) is a specific inhibitor of glycogen synthase kinase-3 (GSK-3), with IC50 of 5 nM for GSK-3α/β, shows >16-fold selectivity over CDK5. BIO interacts within the ATP binding pocket of these kinases, reduces β-catenin phosphorylation on a GSK-3-specific site in cellular models, closely mimicks Wnt signaling in Xenopus embryos. [1] In human and mouse embryonic stem cells, BIO maintains the undifferentiated phenotype and sustains expression of the pluripotent state-specific transcription factors Oct-3/4, Rex-1 and Nanog. BIO-mediated Wnt activation is functionally reversible, as withdrawal of the compound leads to normal multidifferentiation programs in both human and mouse embryonic stem cells. [2] BIO promotes proliferation in mammalian cardiomyocytes. [3]6BIO is also a pan-JAK inhibitor, with IC50 values of 0.03, 1.5, 8.0, 0.5 μM for TYK2, JAK1, JAK2 and JAK3. BIO selectively inhibits phosphorylation of STAT3 and induces apoptosis of human melanoma cells. [4]

In vivo BIO suppresses melanoma tumor growth in a mouse xenograft model. [4]


Kinase Assay:[1]
+ Expand

Kinase assay:

Kinase activities are assayed in Buffer A or C at 30°C, at a final ATP concentration of 15 μM. Blank values are subtracted and activities calculated as pmoles of phosphate incorporated during a 10 min incubation. Controls are performed with appropriate dilutions of dimethylsulfoxide. In a few cases phosphorylation of the substrate is assessed by autoradiography after SDS-PAGE. GSK-3α/β is purified from porcine brain by affinity chromatography on immobilized axin. It is assayed, following a 1/100 dilution in 1 mg BSA/ml 10 mM DTT, with 5 μl 40 μM GS-1 peptide, a specific GSK-3 substrate, (YRRAAVPPSPSLSRHSSPHQSpEDEEE), in buffer A, in the presence of 15 μM [γ-32P] ATP (3,000 Ci/mmol; 1 mCi/ml) in a final volume of 30 μl. After 30 min incubation at 30°C, 25 μl aliquots of supernatant are spotted onto 2.5 × 3 cm pieces of Whatman P81 phosphocellulose paper, and 20 seconds later, the filters are washed five times (for at least 5 min each time) in a solution of 10 ml phosphoric acid/liter of water. The wet filters are counted in the presence of 1 ml ACS scintillation fluid.
Cell Research:[1]
+ Expand
  • Cell lines: COS1, Hepa or SH-SY5Y cells
  • Concentrations: ~10 μM
  • Incubation Time: 12 or 24 h
  • Method: COS1, Hepa (wild-type, CEM/LM AhR deficient and ELB1 ARNT deficient), or SH-SY5Y cells are grown in 6 cm culture dishes in Dulbecco's Modified Medium (DMEM) containing 10% fetal bovine serum. For treatment, IO (5 μM), BIO (5 or 10 μM), MeBIO (5 or 50 μM), LiCl (20 or 40 mM), or mock solution (DMSO, 0.5% final concentration) is added to medium when cell density reaches ∼70% confluence. After 12 (SH-SY5Y) or 24 hours, the cells, while still in plate, are lysed with lysis buffer (1% SDS, 1 mM sodium orthovanadate, 10 mM Tris [pH 7.4]). The lysate is passed several times through a 26G needle, centrifuged at 10,000 × g for 5 min, and adjusted to equal protein concentration. About 8 μg of each sample is loaded for immunoblotting. Enhanced chemiluminescence is used for detection. The following primary antibodies are used: mouse anti-β-catenin CT (Upstate Biotechnolgies, Clone 7D8, recognizes total β-catenin), mouse anti-phospho-β-catenin (Upstate Biotechnologies, Clone 8E7, recognizes dephosphorylated β-catenin), mouse anti-GSK-3 β, mouse anti-GSK-3 phosphoTyr216, rabbit anti-AhR (Aryl hydrocarbon receptor), and rabbit anti-actin.
    (Only for Reference)
Animal Research:[4]
+ Expand
  • Animal Models: mouse
  • Formulation: freshly prepared in 30% Solutol (Basf) at a concentration of 10 mg/mL.
  • Dosages: 50 mg/kg
  • Administration: Oral gavage
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 71 mg/mL (199.34 mM)
Ethanol 21 mg/mL (58.96 mM)
Water <1 mg/mL
In vivo 30% PEG400+0.5% Tween80+5% propylene glycol 30 mg/mL

* 1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 356.17


CAS No. 667463-62-9
Storage powder
in solvent
Synonyms GSK-3 Inhibitor IX, 6-bromoindirubin-3-oxime

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Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02991495 Not yet recruiting Yellow Fever Epicentre April 2017 Phase 4
NCT03022708 Not yet recruiting Heart Defect, Congenital Xeltis March 2017 --
NCT03025516 Not yet recruiting Pulmonary TB|Diagnoses Diseases Find|Universidad Peruana Cayetano Heredia|University of Cape Town March 2017 --
NCT03044002 Not yet recruiting Peripheral Artery Disease|Access Site Complication|Outpatient Treatment Biotronik AG February 2017 --
NCT02753439 Not yet recruiting Impacted Third Molar Tooth The Baruch Padeh Medical Center, Poriya|Geistlich Pharma AG February 2017 --
NCT03008616 Not yet recruiting Severe Preeclampsia Velo Bio, LLC February 2017 Phase 2

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GSK-3 Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID