scholarly journals Protein Kinase C  and Glycogen Synthase Kinase-3  Control Neuronal Polarity in Developing Rodent Enteric Neurons, whereas SMAD Specific E3 Ubiquitin Protein Ligase 1 Promotes Neurite Growth But Does Not Influence Polarity

2007 ◽  
Vol 27 (35) ◽  
pp. 9458-9468 ◽  
Author(s):  
B. P. S. Vohra ◽  
M. Fu ◽  
R. O. Heuckeroth
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Glycogen Synthase ◽  
Neurite Growth ◽  
Enteric Neurons ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Neuronal Polarity ◽  
Ubiquitin Protein Ligase ◽  
Kinase C

scholarly journals Dual Regulation of Glycogen Synthase Kinase 3 (GSK3)α/β by Protein Kinase C (PKC)α and Akt Promotes Thrombin-mediated Integrin αIIbβ3Activation and Granule Secretion in Platelets

2012 ◽  
Vol 288 (6) ◽  
pp. 3918-3928 ◽  
Author(s):  
Samantha F. Moore ◽  
Marion T. J. van den Bosch ◽  
Roger W. Hunter ◽  
Kei Sakamoto ◽  
Alastair W. Poole ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Glycogen Synthase ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Kinase C ◽  
Granule Secretion

scholarly journals Convergence of Multiple Signaling Cascades at Glycogen Synthase Kinase 3: Edg Receptor-Mediated Phosphorylation and Inactivation by Lysophosphatidic Acid through a Protein Kinase C-Dependent Intracellular Pathway

2002 ◽  
Vol 22 (7) ◽  
pp. 2099-2110 ◽  
Author(s):  
Xianjun Fang ◽  
Shuangxing Yu ◽  
Janos L. Tanyi ◽  
Yiling Lu ◽  
James R. Woodgett ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Lysophosphatidic Acid ◽  
Glycogen Synthase ◽  
Glycogen Synthase Kinase ◽  
Hek293 Cells ◽  
Glycogen Synthase Kinase 3 ◽  
Kinase C ◽  
Pkc Inhibitors

ABSTRACT Lysophosphatidic acid (LPA) is a natural phospholipid with multiple biological functions. We show here that LPA induces phosphorylation and inactivation of glycogen synthase kinase 3 (GSK-3), a multifunctional serine/threonine kinase. The effect of LPA can be reconstituted by expression of Edg-4 or Edg-7 in cells lacking LPA responses. Compared to insulin, LPA stimulates only modest phosphatidylinositol 3-kinase (PI3K)-dependent activation of protein kinase B (PKB/Akt) that does not correlate with the magnitude of GSK-3 phosphorylation induced by LPA. PI3K inhibitors block insulin- but not LPA-induced GSK-3 phosphorylation. In contrast, the effect of LPA, but not that of insulin or platelet-derived growth factor (PDGF), is sensitive to protein kinase C (PKC) inhibitors. Downregulation of endogenous PKC activity selectively reduces LPA-mediated GSK-3 phosphorylation. Furthermore, several PKC isotypes phosphorylate GSK-3 in vitro and in vivo. To confirm a specific role for PKC in regulation of GSK-3, we further studied signaling properties of PDGF receptor β subunit (PDGFRβ) in HEK293 cells lacking endogenous PDGF receptors. In clones expressing a PDGFRβ mutant wherein the residues that couple to PI3K and other signaling functions are mutated with the link to phospholipase Cγ (PLCγ) left intact, PDGF is fully capable of stimulating GSK-3 phosphorylation. The process is sensitive to PKC inhibitors in contrast to the response through the wild-type PDGFRβ. Therefore, growth factors, such as PDGF, which control GSK-3 mainly through the PI3K-PKB/Akt module, possess the ability to regulate GSK-3 through an alternative, redundant PLCγ-PKC pathway. LPA and potentially other natural ligands primarily utilize a PKC-dependent pathway to modulate GSK-3.

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