Cajal-Retzius cells instruct neuronal migration by coincidence signaling between secreted and contact-dependent guidance cues

Cristina Gil-Sanz, Santos J. Franco, Isabel Martinez-Garay, Ana Espinosa, Sarah Harkins-Perry, Ulrich Müller

Research output: Contribution to journalArticlepeer-review

Abstract

The convergence of APP (substrate) and BACE-1 (enzyme) is a rate-limiting, obligatory event triggering the amyloidogenic pathway-a key step in Alzheimer@s disease (AD) pathology. However, as both APP/BACE-1 are highly expressed in brain, mechanisms precluding their unabated convergence are unclear. Exploring dynamic localization of APP/BACE-1 in cultured hippocampal neurons, we found that after synthesis via the secretory pathway, dendritic APP/BACE-1-containing vesicles are largely segregated in physiologic states. While BACE-1 is sorted into acidic recycling endosomes, APP is conveyed in Golgi-derived vesicles. However, upon activity induction-a known trigger of the amyloidogenic pathway-APP is routed into BACE-1-positive recycling endosomes via a clathrin-dependent mechanism. A partitioning/convergence of APP/BACE-1 vesicles is also apparent in control/AD brains, respectively. Considering BACE-1 is optimally active in an acidic environment, our experiments suggest that neurons have evolved trafficking strategies that normally limit APP/BACE-1 proximity and also uncover a pathway routing APP into BACE-1-containing organelles, triggering amyloidogenesis

Original languageEnglish (US)
Pages (from-to)461-477
Number of pages17
JournalNeuron
Volume79
Issue number3
DOIs
StatePublished - Aug 7 2013
Externally publishedYes

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Cajal-Retzius cells instruct neuronal migration by coincidence signaling between secreted and contact-dependent guidance cues'. Together they form a unique fingerprint.

Cite this