product name GSK-3 Inhibitor IX (BIO)
Description: BIO is a specific inhibitor of GSK-3 with IC50 of 5 nM for GSK-3α/β in a cell-free assay, it shows >16-fold selectivity over CDK5, also a pan-JAK inhibitor. BIO also activated Wnt signaling and involved in maintaining pluripotency in human and mouse ESCs (embryonic stem cells). In Cos-1 cells treated with 5 μm BIO for 24 hours, phosphorylation of β-catenin was inhibited on GSK-3 specific sites. In cell line deficient for AhR or ARNT, 10 μm BIO treatment for 24 hours showed its effect is through a direct and AhR- independent pathway.
References: Chem Biol. 2003 Dec;10(12):1255-66; Nat Med. 2004 Jan;10(1):55-63; Cancer Res. 2011 Jun 1;71(11):3972-9.
356.17
Formula
C16H10BrN3O2
CAS No.
667463-62-9
Storage
-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)
DMSO: 71 mg/mL (199.3 mM)
Water: <1 mg/mL
Ethanol: 21 mg/mL (59.0 mM)
Solubility (In vivo)
30% PEG400+0.5% Tween80+5% propylene glycol: 30 mg/mL
Synonyms
GSK-3 Inhibitor IX, 6-bromoindirubin-3-oxime
other peoduct :References PubMed ID：:http://www.ncbi.nlm.nih.gov/pubmed/19423857
| In Vitro |
In vitro activity: 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 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 Assay: COS1, Hepa (wild-type, CEM/LM AhR deficient and ELB1 ARNT deficient), or SH-SY5Y cells are grown in 6 cm culture dishes in Dulbeccos 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. |
|---|---|
| In Vivo | BIO suppresses melanoma tumor growth in a mouse xenograft model. |
| Animal model | Xenopus laevis embryos model |
| Formulation & Dosage | Dissolved in 30% Solutol (Basf) at a concentration of 10 mg/mL; 50 mg/kg; Oral gavage |
| References | Chem Biol. 2003 Dec;10(12):1255-66; Nat Med. 2004 Jan;10(1):55-63; Cancer Res. 2011 Jun 1;71(11):3972-9. |
