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SNAREs Controlling Vesicular Release of BDNF and Development of Callosal Axons.

Abstract：

:At presynaptic active zones, exocytosis of neurotransmitter vesicles (SVs) is driven by SNARE complexes that recruit Syb2 and SNAP25. However, it remains unknown which SNAREs promote the secretion of neuronal proteins, including those essential for circuit development and experience-dependent plasticity. Here we demonstrate that Syb2 and SNAP25 mediate the vesicular release of BDNF in axons and dendrites of cortical neurons, suggesting these SNAREs act in multiple spatially segregated secretory pathways. Remarkably, axonal secretion of BDNF is also strongly regulated by SNAP47, which interacts with SNAP25 but appears to be dispensable for exocytosis of SVs. Cell-autonomous ablation of SNAP47 disrupts the layer-specific branching of callosal axons of projection cortical neurons in vivo, and this phenotype is recapitulated by ablation of BDNF or its receptor, TrkB. Our results provide insights into the molecular mechanisms of protein secretion, and they define the functions of SNAREs in BDNF signaling and regulation of neuronal connectivity.

journal_name

Cell Rep

journal_title

Cell reports

authors

Shimojo M,Courchet J,Pieraut S,Torabi-Rander N,Sando R 3rd,Polleux F,Maximov A

doi

10.1016/j.celrep.2015.04.032

subject

Has Abstract

pub_date

2015-05-19 00:00:00

pages

1054-66

issue

7

issn

2211-1247

pii

S2211-1247(15)00433-7

journal_volume

11

pub_type

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