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Expression of Rab3A GTPase and other synaptic proteins is induced in differentiated NT2N neurons

Authors
  • Sheridan, Kathleen M.1
  • Maltese, William A.1
  • 1 Pennsylvania State University College of Medicine, Hood Research Program, Weis Center for Research, 100 N. Academy Avenue, Danville, PA, 17822-2616 , Danville
Type
Published Article
Journal
Journal of Molecular Neuroscience
Publisher
Springer-Verlag
Publication Date
Apr 01, 1998
Volume
10
Issue
2
Pages
121–128
Identifiers
DOI: 10.1007/BF02737123
Source
Springer Nature
Keywords
License
Yellow

Abstract

Postmitotic NT2N cells, which are derived from human NT2 teratocarcinoma cells by treatment with retinoic acid (RA) and mitotic inhibitors, are viewed as a good in vitro model for mature neurons of the human central nervous system. Although NT2N cells exhibit many morphological and biochemical characteristics of neurons, the expression of key protein components involved in regulated exocytosis have not been firmly established. Here we show by immunoblot analysis that mature morphologically differentiated NT2N cells contain readily detectable quantities of the synaptic vesicle-associated proteins, synaptobrevin, synapsin, and synaptophysin. They also express the presynaptic plasma membrane protein, SNAP-25, and a Rab GTPase implicated in the control of Ca2+-dependent exocytosis, Rab3A. These proteins were not detected in untreated NT2 cells or cells exposed to RA for only 6 d. The induction of an array of proteins known to be involved in the docking and fusion of synaptic vesicles with the plasma membrane provides further support for the validity of NT2N cells as a model for human cortical neurons and suggests that these cells may be useful for in vitro molecular studies of the Ca2+-regulated exocytic pathway in nerve terminals.

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