Distinct subsets of syt-IV/BDNF vesicles are sorted to axons versus dendrites and recruited to synapses by activity
BDNF plays a critical role in the regulation of synaptic strength and is essential for long-term potentiation, a phenomenon that underlies learning and memory. However, whether BDNF acts in a diffuse manner or is targeted to specific neuronal subcompartments or synaptic sites to affect circuit funct...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
18 April 2012
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| In: |
The journal of neuroscience
Year: 2012, Volume: 32, Issue: 16, Pages: 5398-5413 |
| ISSN: | 1529-2401 |
| DOI: | 10.1523/JNEUROSCI.4515-11.2012 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1523/JNEUROSCI.4515-11.2012 Verlag, Volltext: http://www.jneurosci.org/content/32/16/5398 
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| Author Notes: | Camin Dean, Huisheng Liu, Thorsten Staudt, Markus A. Stahlberg, Siv Vingill, Johanna Bückers, Dirk Kamin, Johann Engelhardt, Meyer B. Jackson, Stefan W. Hell, and Edwin R. Chapman |
MARC
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| 520 | |a BDNF plays a critical role in the regulation of synaptic strength and is essential for long-term potentiation, a phenomenon that underlies learning and memory. However, whether BDNF acts in a diffuse manner or is targeted to specific neuronal subcompartments or synaptic sites to affect circuit function remains unknown. Here, using photoactivation of BDNF or syt-IV (a regulator of exocytosis present on BDNF-containing vesicles) in transfected rat hippocampal neurons, we discovered that distinct subsets of BDNF vesicles are targeted to axons versus dendrites and are not shared between these compartments. Moreover, syt-IV- and BDNF-harboring vesicles are recruited to both presynaptic and postsynaptic sites in response to increased neuronal activity. Finally, using syt-IV knockout mouse neurons, we found that syt-IV is necessary for both presynaptic and postsynaptic scaling of synaptic strength in response to changes in network activity. These findings demonstrate that BDNF-containing vesicles can be targeted to specific sites in neurons and suggest that syt-IV-regulated BDNF secretion is subject to spatial control to regulate synaptic function in a site-specific manner. | ||
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