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Mol Cells. 2000 Aug 31;10(4):469-74.

Interleukin-6-induced tyrosine phosphorylation of phospholipase C-gamma1 in PC12 cells.

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Department of Life Science and School of Environmental Engineering, Pohang University of Science and Technology, Korea.


Phospholipase C (PLC)-gamma1 plays a pivotal role in the signal transduction pathway mediated by growth factors. In this study, we found that neurite outgrowth of pheochromocytoma (PC12) cells was significantly induced by interleukin-6 (IL-6). Stimulation of PC12 cells with IL-6 led to tyrosine phosphorylation of PLC-gamma1 in a dose- and time-dependent manner. IL-6 stimulation also increased the hydrolysis of phosphatidylinositol 4,5-bisphosphate. Accumulation of total inositol phosphate as well as tyrosine phosphorylation of PLC-gamma1 was inhibited by the pretreatment of protein kinase inhibitors such as genistein and staurosporine. These results suggest that PLC-gamma1 may be involved in the signal transduction pathway of IL-6-induced PC12 cell differentiation.

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