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Discovery and Development of GSK3 Inhibitors for the Treatment of Type 2 Diabetes
Abstract
Originally identified as a modulator of glycogen metabolism, glycogen synthase kinase-3 (GSK3) is now understood to play an important regulatory role in a variety of pathways including initiation of protein synthesis, cell proliferation, cell differentiation, apoptosis, and is essential for embryonic development as a component of the Wnt signaling cascade. GSK3 can be considered as a target for both metabolic and neurological disorders. GSK3's association with neuronal apoptosis and hyper-phosphorylation of tau make this kinase an attractive therapeutic target for neurodegenerative conditions such as head trauma, stroke and Alzheimer's disease. While noting GSK3's many associated functions, this review will focus on GSK3 as a central negative regulator in the insulin signaling pathway, its role in insulin resistance, and the utility of GSK3 inhibitors for intervention and control of metabolic diseases including type 2 diabetes. Recent crystal structures, including the active (phosphorylated Tyr-216) form of GSK3beta, provide a wealth of structural information and greater understanding of GSK3's unique regulation and substrate specificity. Many potent and selective small molecule inhibitors of GSK3 have now been identified, and used in vitro to modulate glycogen metabolism and gene transcription, increase glycogen synthase activity and enhance insulin-stimulated glucose transport. The pharmacology of potent and selective GSK3 inhibitors (CT 99021 and CT 20026) is described in a number of in vitro and in vivo models following acute or chronic exposure. The efficacy of clinical candidates in diabetic primates and the implications for clinical development are discussed. The profile of activity is consistent with a unique form of insulin sensitization which is well suited for indications such as metabolic syndrome X and type 2 diabetes.
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In the citing paper
“The concentration of GSK-3 inhibitor causing half-maximal glycogen synthase stimulation (EC 50 ) in CHO-IR cells was 66 nmol/l [35], which is similar to the EC 50 observed in soleus muscles in this study (data not shown).”
In the citing paper
“CHIR-637, a low-molecular weight (531 Da) small molecule, is an ATP-competitive inhibitor of GSK-3β giving an IC 50 of 4 nmol/l in a cell-free binding assay [35].”
In the citing paper
“This inhibitor is approximately equipotent against both isoforms of GSK-3 (α/β).”
In the citing paper
“Like other GSK-3 inhibitors in this class, it exhibits >2,500-fold selectivity against a panel of 16 other protein kinases, including cdc2 and erk2, which are the closest homologues of GSK-3.”
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Metadata
- Authors
- Wagman, A., Johnson, K., & Bussiere, D.
- Venue
- Current Pharmaceutical Design
- Publisher
- Bentham Science Publishers Ltd.
- Published
- 2004-04-01
- Volume
- 10
- Issue
- 10
- Pages
- 1105-1137
- ISSN
- 1381-6128 (ISSN-L)
- OpenAlex
- W2146895097
- Cited by
- 153
- References
- 0
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 7 · 2023: 4 · 2022: 4 · 2021: 2 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 4 · 2016: 6 · 2015: 5 · 2014: 6 · 2013: 8 · 2012: 5
- FWCI
- 4.62
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Current Pharmaceutical Design (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Keywords
- glycogen synthase kinase-3, GSK-3 inhibitors, type 2 diabetes, insulin resistance, insulin signaling, insulin sensitization, glycogen metabolism, Wnt signaling, tau hyperphosphorylation, metabolic syndrome, small-molecule kinase inhibitors, clinical development
- MeSH terms
- Animals, Diabetes Mellitus, Experimental, Diabetes Mellitus, Type 2, Enzyme Inhibitors, Humans, Hypoglycemic Agents, Models, Molecular, Substrate Specificity, Drug Design, Molecular Structure, Glycogen Synthase Kinase 3
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