scholarly journals Deletion of Cardiomyocyte Glycogen Synthase Kinase-3 Beta (GSK-3β) Improves Systemic Glucose Tolerance with Maintained Heart Function in Established Obesity

Cells ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 1120 ◽  
Author(s):  
Manisha Gupte ◽  
Prachi Umbarkar ◽  
Anand Prakash Singh ◽  
Qinkun Zhang ◽  
Sultan Tousif ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Cardiac Function ◽  
Cardiac Dysfunction ◽  
Glycogen Synthase ◽  
Critical Role ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Total Period ◽  
Gsk 3Β

Obesity is an independent risk factor for cardiovascular diseases (CVD), including heart failure. Thus, there is an urgent need to understand the molecular mechanism of obesity-associated cardiac dysfunction. We recently reported the critical role of cardiomyocyte (CM) Glycogen Synthase Kinase-3 beta (GSK-3β) in cardiac dysfunction associated with a developing obesity model (deletion of CM-GSK-3β prior to obesity). In the present study, we investigated the role of CM-GSK-3β in a clinically more relevant model of established obesity (deletion of CM-GSK-3β after established obesity). CM-GSK-3β knockout (GSK-3βfl/flCre+/−) and controls (GSK-3βfl/flCre−/−) mice were subjected to a high-fat diet (HFD) in order to establish obesity. After 12 weeks of HFD treatment, all mice received tamoxifen injections for five consecutive days to delete GSK-3β specifically in CMs and continued on the HFD for a total period of 55 weeks. To our complete surprise, CM-GSK-3β knockout (KO) animals exhibited a globally improved glucose tolerance and maintained normal cardiac function. Mechanistically, in stark contrast to the developing obesity model, deleting CM-GSK-3β in obese animals did not adversely affect the GSK-3αS21 phosphorylation (activity) and maintained canonical β-catenin degradation pathway and cardiac function. As several GSK-3 inhibitors are in the trial to treat various chronic conditions, including metabolic diseases, these findings have important clinical implications. Specifically, our results provide critical pre-clinical data regarding the safety of GSK-3 inhibition in obese patients.

scholarly journals Glycogen synthase kinase-3-mediated phosphorylation of serine 73 targets sterol response element binding protein-1c (SREBP-1c) for proteasomal degradation

2016 ◽  
Vol 36 (1) ◽  
Author(s):  
Qingming Dong ◽  
Francesco Giorgianni ◽  
Sarka Beranova-Giorgianni ◽  
Xiong Deng ◽  
Robert N. O'Meally ◽  
...  
Keyword(s):  
Functional Role ◽  
Glycogen Synthase ◽  
Proteasomal Degradation ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Response Element ◽  
Element Binding Protein ◽  
Gsk 3Β

We have identified Serine 73 as a novel GSK-3β site on SREBP-1c that alters its affinity for SCAP, and proteasomal degradation. Phosphorylation of Serine 73 by GSK-3β during starvation (insulin-depleted stat) may lead to lower levels of SREBP-1c; conversely, de-phosphorylation of this site may be involved in stabilizing SREBP-1c by insulin (by blocking GSK-3β action). A functional role of this site needs to be corroborated in vivo.

scholarly journals GSK-3β in Pancreatic Cancer: Spotlight on 9-ING-41, Its Therapeutic Potential and Immune Modulatory Properties

Biology ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 610
Author(s):  
Robin Park ◽  
Andrew L. Coveler ◽  
Ludimila Cavalcante ◽  
Anwaar Saeed
Keyword(s):  
Pancreatic Cancer ◽  
Therapeutic Potential ◽  
Glycogen Synthase ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
In Vivo Models ◽  
Gsk 3Β ◽  
Early Phase Clinical Trials

Glycogen synthase kinase-3 beta is a ubiquitously and constitutively expressed molecule with pleiotropic function. It acts as a protooncogene in the development of several solid tumors including pancreatic cancer through its involvement in various cellular processes including cell proliferation, survival, invasion and metastasis, as well as autophagy. Furthermore, the level of aberrant glycogen synthase kinase-3 beta expression in the nucleus is inversely correlated with tumor differentiation and survival in both in vitro and in vivo models of pancreatic cancer. Small molecule inhibitors of glycogen synthase kinase-3 beta have demonstrated therapeutic potential in pre-clinical models and are currently being evaluated in early phase clinical trials involving pancreatic cancer patients with interim results showing favorable results. Moreover, recent studies support a rationale for the combination of glycogen synthase kinase-3 beta inhibitors with chemotherapy and immunotherapy, warranting the evaluation of novel combination regimens in the future.

scholarly journals Erratum to: A Crosstalk between the Biorhythms and Gatekeepers of Longevity: Dual Role of Glycogen Synthase Kinase-3

2021 ◽  
Vol 86 (5) ◽  
pp. 611-611
Author(s):  
Gregory A. Shilovsky ◽  
Tatyana S. Putyatina ◽  
Galina V. Morgunova ◽  
Alexander V. Seliverstov ◽  
Vasily V. Ashapkin ◽  
...  
Keyword(s):  
Glycogen Synthase ◽  
Dual Role ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3

scholarly journals Possible Role of the Glycogen Synthase Kinase-3 Signaling Pathway in Trimethyltin-Induced Hippocampal Neurodegeneration in Mice

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e70356 ◽  
Author(s):  
Juhwan Kim ◽  
Miyoung Yang ◽  
Sung-Ho Kim ◽  
Jong-Choon Kim ◽  
Hongbing Wang ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Glycogen Synthase ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Hippocampal Neurodegeneration

scholarly journals Identification of a novel selective and potent inhibitor of glycogen synthase kinase-3

2019 ◽  
Vol 317 (6) ◽  
pp. C1289-C1303 ◽  
Author(s):  
Mahboubeh S. Noori ◽  
Pooja M. Bhatt ◽  
Maria C. Courreges ◽  
Davoud Ghazanfari ◽  
Chaz Cuckler ◽  
...  
Keyword(s):  
Design Space ◽  
Potent Inhibitor ◽  
Glycogen Synthase ◽  
Selective Inhibition ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Cellular Functions ◽  
Starting Point ◽  
Potential Therapeutics

Glycogen synthase kinase-3 (GSK-3) is a multitasking protein kinase that regulates numerous critical cellular functions. Not surprisingly, elevated GSK-3 activity has been implicated in a host of diseases including pathological inflammation, diabetes, cancer, arthritis, asthma, bipolar disorder, and Alzheimer’s. Therefore, reagents that inhibit GSK-3 activity provide a means to investigate the role of GSK-3 in cellular physiology and pathophysiology and could become valuable therapeutics. Finding a potent inhibitor of GSK-3 that can selectively target this kinase, among over 500 protein kinases in the human genome, is a significant challenge. Thus there remains a critical need for the identification of selective inhibitors of GSK-3. In this work, we introduce a novel small organic compound, namely COB-187, which exhibits potent and highly selective inhibition of GSK-3. Specifically, this study 1) utilized a molecular screen of 414 kinase assays, representing 404 unique kinases, to reveal that COB-187 is a highly potent and selective inhibitor of GSK-3; 2) utilized a cellular assay to reveal that COB-187 decreases the phosphorylation of canonical GSK-3 substrates indicating that COB-187 inhibits cellular GSK-3 activity; and 3) reveals that a close isomer of COB-187 is also a selective and potent inhibitor of GSK-3. Taken together, these results demonstrate that we have discovered a region of chemical design space that contains novel GSK-3 inhibitors. These inhibitors will help to elucidate the intricate function of GSK-3 and can serve as a starting point for the development of potential therapeutics for diseases that involve aberrant GSK-3 activity.

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