Syntaxin 1 is required for DCC/Netrin‐1‐dependent chemoattraction of migrating neurons from the lower rhombic lip |
| |
Authors: | Tiziana Cotrufo Rosa María Andrés Oriol Ros Francesc Pérez‐Brangulí Ashraf Muhaisen Giulia Fuschini Ramón Martínez Marta Pascual Joan X. Comella Eduardo Soriano |
| |
Affiliation: | 1. Developmental Neurobiology and Regeneration Unit, Department of Cell Biology, Institute for Research in Biomedicine, Parc Cientific de Barcelona, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), University of Barcelona, Barcelona, Spain;2. Cell Signaling and Apoptosis Laboratory, Institut de Recerca del Hospital Vall D’Hebron (VHIR) and Institut de Neurociències, Autonomous University of Barcelona, Bellaterra, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain |
| |
Abstract: | Directed cell migration and axonal guidance are essential steps in neural development that share many molecular mechanisms. The guidance of developing axons and migrating neurons is likely to depend on the precise control of plasmalemma turnover in selected regions of leading edges and growth cones, respectively. Previous results provided evidence of a signaling mechanism that couples chemotropic deleted in colorectal cancer (DCC)/Netrin‐1 axonal guidance and exocytosis through Syntaxin1(Sytx1)/TI‐VAMP SNARE proteins. Here we studied whether Netrin‐1‐dependent neuronal migration relies on a similar SNARE mechanism. We show that migrating neurons in the lower rhombic lip (LRL) express several SNARE proteins, and that DCC co‐associates with Sytx1 and TI‐VAMP in these cells. We also demonstrate that cleavage of Sytx1 by botulinum toxin C1 (BoNT/C1) abolishes Netrin‐1‐dependent chemoattraction of migrating neurons, and that interference of Sytx1 functions with shRNAs or Sytx1‐dominant negatives disrupts Netrin‐1‐dependent chemoattraction of LRL neurons. These findings indicate that a Sytx1/DCC interaction is required for Netrin‐1 guidance of migrating neurons, thereby highlighting a relationship between guidance signaling and SNARE proteins that regulate membrane turnover. |
| |
Keywords: | membrane turnover mouse nervous system development SNARE proteins |
|
|