Volume 33, Issue 6 pp. 735-748
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Activity-dependent regulation of N-cadherin in DRG neurons: Differential regulation of N-cadherin, NCAM, and L1 by distinct patterns of action potentials

Kouichi Itoh

Kouichi Itoh

Unit on Neurocytology and Physiology, Laboratory of Developmental Neurobiology, UNP, National Institutes of Health, NICHD, Building 49, Room 5A38, 49 Convent Drive, Bethesda, Maryland 20892

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Miwako Ozaki

Miwako Ozaki

Unit on Neurocytology and Physiology, Laboratory of Developmental Neurobiology, UNP, National Institutes of Health, NICHD, Building 49, Room 5A38, 49 Convent Drive, Bethesda, Maryland 20892

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Beth Stevens

Beth Stevens

Unit on Neurocytology and Physiology, Laboratory of Developmental Neurobiology, UNP, National Institutes of Health, NICHD, Building 49, Room 5A38, 49 Convent Drive, Bethesda, Maryland 20892

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R. Douglas Fields

Corresponding Author

R. Douglas Fields

Unit on Neurocytology and Physiology, Laboratory of Developmental Neurobiology, UNP, National Institutes of Health, NICHD, Building 49, Room 5A38, 49 Convent Drive, Bethesda, Maryland 20892

Unit on Neurocytology and Physiology, Laboratory of Developmental Neurobiology, UNP, National Institutes of Health, NICHD, Building 49, Room 5A38, 49 Convent Drive, Bethesda, Maryland 20892Search for more papers by this author

Abstract

Cell adhesion molecule (CAM) expression is highly regulated during nervous system development to control cell migration, neurite outgrowth, fasciculation, and synaptogenesis. Using electrical stimulation of mouse dorsal root ganglion (DRG) neurons in cell culture, this work shows that N-cadherin expression is regulated by neuronal firing, and that expression of different CAMs is regulated by distinct patterns of neural impulses. N-cadherin was down-regulated by 0.1 or 1 Hz stimulation, but NCAM mRNA and protein levels were not altered by stimulation. L1 was down-regulated by 0.1 Hz stimulation, but not by 0.3 Hz, 1 Hz, or pulsed stimulation. N-cadherin expression was lowered with faster kinetics than L1 (1 vs. 5 days), and L1 mRNA returned to higher levels after terminating the stimulus. The RSLE splice variant of L1 was not regulated by action potential stimulation, and activity-dependent influences on L1 expression were blocked by target-derived influences. The results are consistent with changes in firing pattern accompanying DRG development and suggest that functional activity can influence distinct developmental processes by regulating the relative abundance of different CAMs. © 1997 John Wiley & Sons, Inc. J Neurobiol 33: 735–748, 1997

  • 1 This is a US Government work and, as such, is in the public domain in the United States of America.
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