Sparatore B, Patrone M, Passalacqua M, Pedrazzi M, Pontremoli S, Melloni E. Neuronal differentiation of PC12 cells involves changes in protein kinase C-theta distribution and molecular properties.
Biochem Biophys Res Commun 2000;
275:149-53. [PMID:
10944456 DOI:
10.1006/bbrc.2000.3258]
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Abstract
In this study we demonstrate that the rat pheochromocytoma PC12 cell line expresses the novel protein kinase C isozyme designated PKC-θ. The isozyme is almost completely localized in the nuclear compartment of proliferating cells. Following stimulation with the nerve growth factor, PKC-θ is redistributed into the cytoplasm and the outgrowing neurite processes, mostly as a cytoskeletal associated kinase. This event is accompanied by an eightfold increase in the expression level and by the appearance of specific modifications of PKC-θ molecule. Conversely, the kinase is down-regulated once cells reach the terminally differentiated state displaying a neuron-like phenotype. These data suggest a functional role for the kinase in the regulation of cytoskeletal modeling along the multistage differentiation process of PC12 cells.
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