An essential role of phosphatidylinositol 3-kinase in myogenic differentiation.


The oncogene p3k, coding for a constitutively active form of phosphatidylinositol 3-kinase (PI 3-kinase; EC, strongly enhances myogenic differentiation in cultures of chicken-embryo myoblasts. It increases the size of the myotubes and induces elevated levels of the muscle-specific proteins MyoD, myosin heavy chain, creatine kinase, and desmin. Inhibition of PI 3-kinase activity with LY294002 or with dominant-negative mutants of PI 3-kinase interferes with myogenic differentiation and with the induction of muscle-specific genes. PI 3-kinase is therefore an upstream mediator for the expression of the muscle-specific genes and is both necessary and rate-limiting for the process of myogenesis.

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@article{Jiang1998AnER, title={An essential role of phosphatidylinositol 3-kinase in myogenic differentiation.}, author={Bing Jiang and J Z Zheng and Peter Vogt}, journal={Proceedings of the National Academy of Sciences of the United States of America}, year={1998}, volume={95 24}, pages={14179-83} }