التفاصيل البيبلوغرافية
| العنوان: |
BDNF mobilizes synaptic vesicles and enhances synapse formation by disrupting cadherin-β-catenin interactions. |
| المؤلفون: |
Bamji, Shernaz X.1,2, Rico, Beatriz1,3, Kimes, Nikole1,4, Reichardt, Louis F.1 lfr@cgl.ucsf.edu |
| المصدر: |
Journal of Cell Biology. 7/17/2006, Vol. 174 Issue 2, p289-299. 11p. |
| مصطلحات موضوعية: |
*NEURONS, *CENTRAL nervous system, *NEUROTROPHINS, *CELL adhesion molecules, *GLYCOPROTEINS |
| الشركة/الكيان: |
CADHERIN Biomedical Inc. |
| مستخلص: |
Neurons of the vertebrate central nervous system have the capacity to modify synapse number, morphology, and efficacy in response to activity. Some of these functions can be attributed to activity-induced synthesis and secretion of the neurotrophin brain-derived neurotrophic factor (BDNF); however, the molecular mechanisms by which BDNF mediates these events are still not well understood. Using time-lapse confocal analysis, we show that BDNF mobilizes synaptic vesicles at existing synapses, resulting in small clusters of synaptic vesicles "splitting" away from synaptic sites. We demonstrate that BDNF's ability to mobilize synaptic vesicle clusters depends on the dissociation of cadherin-β-catenin adhesion complexes that occurs after tyrosine phosphorylation of β-catenin. Artificially maintaining cadherin-β-catenin complexes in the presence of BDNF abolishes the BDNF-mediated enhancement of synaptic vesicle mobility, as well as the longer-term BDNF-mediated increase in synapse number. Together, this data demonstrates that the disruption of cadherin-β-catenin complexes is an important molecular event through which BDNF increases synapse density in cultured hippocampal neurons. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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