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Biochem Biophys Res Commun. 1998 Mar 6;244(1):226-9.

Expression of HuD protein is essential for initial phase of neuronal differentiation in rat pheochromocytoma PC12 cells.

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Department of Pathology, Kitasato University School of Medicine, Kanagawa, Japan.


HuD is a neuronal-specific, RNA-binding protein. Here we examined the change in the expression of HuD protein during nerve growth factor-mediated differentiation of PC12 cells. As cells differentiated and extended neurites, expression of HuD gradually increased up to 1.5-fold. When HuD expression was counteracted by antisense oligonucleotide, neurite extension was completely inhibited, yet the morphology of differentiated cells remained unchanged even after that treatment. Furthermore, this morphological change correlated well with the downregulation of cyclin-dependent kinase 2 activity. These results suggest that the HuD is critically involved in the initial phase of neuronal differentiation.

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