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Updated: Oct 1, 2026

Induction and Analysis of Epithelial to Mesenchymal Transition
Published on: August 27, 2013
Focal adhesion kinase tyrosine phosphorylation is associated with myogenesis and modulated by insulin
1Signal Transduction Research Laboratory, Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Punjab, India.
Abstract:
Focal adhesion kinase (FAK) was heavily phosphorylated as a function of differentiation of C2C12 mouse skeletal muscle cells. Insulin caused increases in FAK phosphorylation before stabilization in proliferated cells, while in differentiated cells there was a consistent transient inhibition of FAK phosphorylation before stimulation. The expression level of FAK was unaltered. Specific inhibition of insulin receptor tyrosine kinase activity abolished the insulin-mediated dephosphorylation of FAK. The data strongly indicate that FAK tyrosine phosphorylation, necessary for skeletal muscle differentiation, is modulated by insulin. Thus, for the first time, we report the differential regulation of FAK tyrosine phosphorylation by insulin during skeletal muscle differentiation.
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