Crossref journal-article
Society for Neuroscience
The Journal of Neuroscience (393)
Abstract

The mechanisms underlying the subcellular localization of neurotrophins and their receptors are poorly understood. We show that in cultured hippocampal neurons, the mRNAs for BDNF and TrkB have a somatodendritic localization, and we quantify the extent of their dendritic mRNA localization. In the dendrites the labeling covers on average the proximal 30% of the total dendritic length. On high potassium depolarization, the labeling of BDNF and TrkB mRNA extends on average to 68% of the dendritic length. This increase does not depend on new RNA synthesis, is inhibited by the Na+channel blocker tetrodotoxin, and involves the activation of glutamate receptors. Extracellular Ca2+, partly flowing through L-type Ca2+channels, is absolutely required for this process to occur. At the protein level, a brief stimulation of hippocampal neurons with 10 mmKCl leads to a marked increase of BDNF and TrkB immunofluorescence density in the distal portion of dendrites, which also occurs, even if at lower levels, when transport is inhibited by nocodazole. The protein synthesis inhibitor cycloheximide abolishes this increase. The activity-dependent modulation of mRNA targeting and protein accumulation in the dendrites may provide a mechanism for achieving a selective local regulation of the activity of neurotrophins and their receptors, close to their sites of action.

Bibliography

Tongiorgi, E., Righi, M., & Cattaneo, A. (1997). Activity-Dependent Dendritic Targeting of BDNF and TrkB mRNAs in Hippocampal Neurons. The Journal of Neuroscience, 17(24), 9492–9505.

Authors 3
  1. Enrico Tongiorgi (first)
  2. Massimo Righi (additional)
  3. Antonino Cattaneo (additional)
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Dates
Type When
Created 7 years, 4 months ago (April 3, 2018, 9:35 a.m.)
Deposited 2 years, 4 months ago (April 13, 2023, 7:43 a.m.)
Indexed 1 month, 2 weeks ago (July 7, 2025, 1:26 a.m.)
Issued 27 years, 8 months ago (Dec. 15, 1997)
Published 27 years, 8 months ago (Dec. 15, 1997)
Published Online 27 years, 8 months ago (Dec. 15, 1997)
Published Print 27 years, 8 months ago (Dec. 15, 1997)
Funders 0

None

@article{Tongiorgi_1997, title={Activity-Dependent Dendritic Targeting of BDNF and TrkB mRNAs in Hippocampal Neurons}, volume={17}, ISSN={1529-2401}, url={http://dx.doi.org/10.1523/jneurosci.17-24-09492.1997}, DOI={10.1523/jneurosci.17-24-09492.1997}, number={24}, journal={The Journal of Neuroscience}, publisher={Society for Neuroscience}, author={Tongiorgi, Enrico and Righi, Massimo and Cattaneo, Antonino}, year={1997}, month=dec, pages={9492–9505} }