Catalog No.S7198 Synonyms: GSK-3 Inhibitor IX, 6-bromoindirubin-3-oxime
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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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.
(e and f) Confocal immunofluorescence staining. U87 GSLCs and U251 GSLCs were seeded in suspension and treated with control, Tet, BIO or ICG-001 for 48 h. Blue fluorescence represents DAPI, red fluorescence represents β-catenin, and green fluorescence represents TUNEL. Scale bars, 40 μm
Int J Oncol, 2017, 50(1):101-110. BIO purchased from Selleck.
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Choose Selective GSK-3 Inhibitors
|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.|
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.  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.  BIO promotes proliferation in mammalian cardiomyocytes. 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. 
|In vivo||BIO suppresses melanoma tumor growth in a mouse xenograft model. |
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.
|In vitro||DMSO||71 mg/mL (199.34 mM)|
|Ethanol||6 mg/mL (16.84 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
30% PEG400+0.5% Tween80+5% propylene glycol
For best results, use promptly after mixing.
* 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.
|Synonyms||GSK-3 Inhibitor IX, 6-bromoindirubin-3-oxime|
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT03958019||Not yet recruiting||Other: RESTORE II Program||Oesophageal Cancer|Gastric Cancer|Liver Cancer|Pancreatic Cancer||University of Dublin Trinity College|Health Research Board Ireland|St. James''s Hospital Ireland|St Vincent''s University Hospital Ireland|Tallaght University Hospital Ireland||January 1 2020||Not Applicable|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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