Deprivation-induced dendritic shrinkage might be oppositely affected by the expression of wild-type and mutated human amyloid precursor protein

Alán Alpár, Nicole Naumann, Uwe Ueberham, Thomas Arendt, Ulrich Gärtner

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The physiological role of the amyloid precursor protein (APP) and its proteolytic fragments in the brain is associated with neuronal survival, neurite outgrowth, synaptic formation, and neuronal plasticity. However, malregulation of APP processing leads to disordered balance of fragments, which may results in opposite, degenerative neuronal effects. In the present study, we analyzed in vivo effects of the expression of wild-type or mutated human APP on afferent deprivation-induced changes of dendritic morphology. After vibrissectomy, expression of wild-type human APP prevented diameter shrinkage of dendritic segments as well as dendritic rarefaction of apical arbors. In contrast, mutant human APP expression exacerbated degenerative changes of deprived barrel neurons. Degradation of apical arbors was especially pronounced. Results demonstrate for the first time opposite effects of the expression of wild-type and mutated human APP on deprivation-induced dendritic restructuring in vivo.

Original languageEnglish
Pages (from-to)1813-1822
Number of pages10
JournalJournal of Neuroscience Research
Volume87
Issue number8
DOIs
Publication statusPublished - Jun 2 2009

Keywords

  • Barrels
  • Neocortex
  • Pyramidal cell
  • Whisker

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience

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