GSK-3 (EC, originally identified in 1980, is one of the few signaling mediators that play central roles in a diverse range of signaling pathways, including those activated by Wnts, hedgehog, growth factors, cytokines, and G protein-coupled ligands[1]. It has been implemented in the mechanisms that regulate cellular proliferation, migration, inflammation and immune responses, glucose regulation, and apoptosis. For example: active GSK-3 suppresses pro-proliferation substrates, such as β-catenin, Myc, Jun and Snail, and enhances pro-differentiation substrates, such as p53, Rb, PTEN and TSC1/2Although the original name suggests the enzyme is involved only in the process of glycogen metabolism, recent findings have revealed over 50 substrates that are phosphorylated by GSK-3, among them the microtubule-associated protein, tau, that is the predominant component of neurofibrillary tangles in Alzheimer’s disease. Despite the impressive number of processes the enzyme is involved in, only four key mechanisms have been identified that contribute to regulating the actions of GSK3 in a substrate-specific manner. The phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway activated in response to insulin and many other growth factors often is a major regulator of GSK3 because Akt phosphorylates GSK3 on these inhibitory serine residues, but several other kinases also can phosphorylate these regulatory serines, such as protein kinase C and protein kinase A[2].
Recently, researchers found that inhibition of GSK-3 activity desensitizes cells to mTOR inhibitors but sensitizes cells to PLK1 inhibitors. In line with this observation, it has been hypothesized that GSK-3 inhibitors could be used to enhance the efficacy of PLK1 inhibitors, for example. Additionally, if GSK-3 activity were increased or reactivated by a targeted small molecule, cells would become resensitized to drugs from diverse drug classes, from nucleotide analogs to tyrosine kinase inhibitors[3].

[1] D.Wu, W.Pan. GSK3: a multifaceted kinase in Wnt signaling. Trends Biochem Sci. 2010 Mar;35(3):161-8.
[2] Glycogen synthase kinase-3 (GSK3): inflammation, diseases, and therapeutics. RS Jope, CJ Yuskaitis,E Beurel. Neurochem. Res. 2007, 32, 577-595.
From: C.A. Thorne et al. GSK-3 modulates cellular responses to a broad spectrum of kinase inhibitors. Nat Chem Biol. 2015 Jan;11(1):58-63.

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Axon ID Name Description From price
1909 A 1070722 Selective inhibitor of GSK-3 €95.00
2167 AR-A 014418 ATP-competitive GSK-3 inhibitor €85.00
2171 AZD1080 Selective inhibitor of GSK-3α and GSK-3β €90.00
3771 AZD2858 Potent and highly selective Glycogen Synthase Kinase-3β inhibitor €95.00
2194 AZD2858 hydrochloride Potent and highly selective Glycogen Synthase Kinase-3β inhibitor €95.00
1693 BIO GSK-3 inhibitor €90.00
3936 Bisindolylmaleimide I Potent and selective PKC inhibitor €120.00
2931 BRD0705 First-in-class, paralog selective GSK3α inhibitor €210.00
3153 BRD5648 Negative control compound of BRD0705 as a GSK3α inhibitor €210.00
1126 CHIR98014 GSK-3 inhibitor €99.00
1386 CHIR99021 GSK-3 inhibitor €60.00
2435 CHIR99021 dihydrochloride GSK-3 inhibitor €60.00
3509 Cromolyn disodium GSK-3β inhibitor €50.00
2511 IM 12 GSK-3β inhibitor attenuating neuronal differentiation of human NPCs €95.00
5011 Naive Stem Cell 5i inhibitor Set Set of five inhibitors for the induction and maintenance of human naive stem cell pluripotency €200.00
5010 Naive Stem Cell NHSM inhibitor Set Set of inhibitors for isolation, generation, derivatization and stabilization of naive hPSCs €230.00
3154 rac-BRD0705 GSK3α inhibitor €140.00
1303 SB 216763 GSK-3 inhibitor €85.00
2128 Stem Cell 2i inhibitor Set Set of MEK inhibitor PD0325901 (Axon 1408) and GSK-3 inhibitor CHIR99021 (Axon 1386) €90.00
2129 Stem Cell 3i inhibitor Set Set of FGFR inhibitor SU5402 (Axon 1667), MEK inhibitor PD184352 (Axon 1368) and GSK-3 inhibitor CHIR99021 (Axon 1386) €130.00
5009 Stem Cell 4i inhibitor Set Set of Thiazovivin, SB 431542, PD0325901, and CHIR99021 (inhibitors of ROCK, TGF-β, MEK, and GSK-3 resp.) €170.00
5007 Stem Cell 5i inhibitor Set Set of five inhibitors for neural differentiation of human pluripotent stem cells. €200.00
2130 Stem Cell Alternative 2i inhibitor Set Set of SRC inhibitor CGP77675 (Axon 2097) and GSK-3 inhibitor CHIR99021 (Axon 1386) €110.00
5006 Stem Cell CSD inhibitor Set Set of CHIR99021, SU5402, and DAPT, inhibitors of GSK-3, FGFR, and γ-secretase, resp. €140.00
5005 Stem Cell LSC inhibitor Set Set of LDN 193189 HCl, SB 431542 and CHIR99021, inhibitors of BMP, TGF-β, and GSK-3 resp. €130.00
2010 TDZD 8 Selective and non-ATP-competitive inhibitor of GSK-3β €90.00
3579 Tideglusib GSK-3 inhibitor €60.00
1562 TWS 119 GSK-3β inhibitor €70.00

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