scholarly journals Modulation of Agrin-induced Acetylcholine Receptor Clustering by Extracellular Signal-regulated Kinases 1 and 2 in Cultured Myotubes

2010 ◽  
Vol 285 (42) ◽  
pp. 32370-32377 ◽  
Author(s):  
Mendell Rimer
Keyword(s):  
Acetylcholine Receptor ◽  
Receptor Clustering ◽  
Extracellular Signal ◽  
Cultured Myotubes

RNA splicing regulates agrin-mediated acetylcholine receptor clustering activity on cultured myotubes

Neuron ◽  
1992 ◽  
Vol 8 (6) ◽  
pp. 1079-1086 ◽  
Author(s):  
Michael Ferns ◽  
Werner Hoch ◽  
James T. Campanelli ◽  
Fabio Rupp ◽  
Zach W. Hall ◽  
...  
Keyword(s):  
Acetylcholine Receptor ◽  
Rna Splicing ◽  
Receptor Clustering ◽  
Cultured Myotubes

Regulation of acetylcholine receptor clustering by the tumor suppressor APC

2003 ◽  
Vol 6 (10) ◽  
pp. 1017-1018 ◽  
Author(s):  
Junmei Wang ◽  
Zheng Jing ◽  
Lili Zhang ◽  
Guangdou Zhou ◽  
Joe Braun ◽  
...  
Keyword(s):  
Tumor Suppressor ◽  
Acetylcholine Receptor ◽  
Receptor Clustering

scholarly journals Core 1 Glycans on α-Dystroglycan Mediate Laminin-induced Acetylcholine Receptor Clustering but Not Laminin Binding

2003 ◽  
Vol 278 (45) ◽  
pp. 44868-44873 ◽  
Author(s):  
Erin L. McDearmon ◽  
Ariana C. Combs ◽  
James M. Ervasti
Keyword(s):  
Acetylcholine Receptor ◽  
Receptor Clustering ◽  
Laminin Binding

scholarly journals Rafts are Required for Acetylcholine Receptor Clustering

2006 ◽  
Vol 30 (1-2) ◽  
pp. 37-38 ◽  
Author(s):  
Françoise Stetzkowski-Marden ◽  
Michel Recouvreur ◽  
Gilles Camus ◽  
Annie Cartaud ◽  
Sophie Marchand ◽  
...  
Keyword(s):  
Acetylcholine Receptor ◽  
Receptor Clustering

Local Anesthetics Inhibit Muscarinic Receptor-mediated Activation of Extracellular Signal-regulated Kinases in Rat Pheochromocytoma PC12 Cells 

1999 ◽  
Vol 91 (4) ◽  
pp. 1014-1014 ◽  
Author(s):  
Zhiming Tan ◽  
Shuji Dohi ◽  
Kenji Ohguchi ◽  
Shigeru Nakashima ◽  
Yoshinori Nozawa
Keyword(s):  
Tyrosine Phosphorylation ◽  
Pc12 Cells ◽  
Acetylcholine Receptor ◽  
Local Anesthetics ◽  
Muscarinic Acetylcholine Receptor ◽  
Erk Activation ◽  
Muscarinic Acetylcholine ◽  
M3 Muscarinic Acetylcholine Receptor ◽  
Extracellular Signal ◽  
Pheochromocytoma Pc12

Background Because protein phosphorylation is a key mechanism for controlling cellular functions and extracellular signal-regulated kinase (ERK) plays a role in cellular signal transduction, the authors wanted to determine whether local anesthetics interfere with biochemical signaling molecules. Methods Protein tyrosine phosphorylation and ERK activation induced by carbachol, an agonist for muscarinic acetylcholine receptors, were examined in rat pheochromocytoma PC12 cells, a model for investigating signal transduction. Carbachol-induced tyrosine-phosphorylated proteins of 44 and 42 kd were determined by Western blot analysis and identified as activated ERK1 and ERK2 using anti-ERK antibody. The ERK activation was blocked by preincubation with atropine or an M3 muscarinic acetylcholine receptor antagonist 4-diphenyacetooxy-1, 1-dimethylpiperidinium, indicating that is was mediated by M3 muscarinic acetylcholine receptor activation. Then, in the presence of local anesthetic, the carbachol-induced tyrosine phosphorylation and ERK activation were evaluated. The effects of three Na+ current-modifying reagents on carbachol-induced ERK activation were also evaluated. Results Procaine (10(-4) to 10(-3) M) inhibited carbachol-induced tyrosine phosphorylation and ERK activation in a concentration-dependent manner. Although tetracaine, lidocaine, and bupivacaine similarly suppressed carbachol-induced tyrosine phosphorylation and ERK activation, neither tetrodotoxin, veratridine, nor ouabain affected the carbachol-induced ERKs activation. Both ERKs were also activated by 4beta-phorbol 12-myristate 13-acetate, an activator of protein kinase C, and fluoroaluminate (AlF4-), respectively, but procaine did not affect ERK activation induced by these two substances. The inhibition of carbachol-induced ERK activation by procaine was not modified by a phosphatase inhibitor, calyculin A. Conclusions The current results indicate that local anesthetics inhibit the activity of the signal-transducing molecule(s) leading to M3 muscarinic acetylcholine receptor-mediated ERK activation in PC12 cells. Such action is unlikely to be a result of the drug's action on Na+ channels or on the electrochemical gradients of the neuronal cell membrane.

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