Transient Deregulation of Canonical Wnt Signaling in Developing Pyramidal Neurons Leads to Dendritic Defects and Impaired Behavior.
Cell Rep
; 27(5): 1487-1502.e6, 2019 04 30.
Article
in En
| MEDLINE
| ID: mdl-31042475
ABSTRACT
During development, the precise implementation of molecular programs is a key determinant of proper dendritic development. Here, we demonstrate that canonical Wnt signaling is active in dendritic bundle-forming layer II pyramidal neurons of the rat retrosplenial cortex during dendritic branching and spine formation. Transient downregulation of canonical Wnt transcriptional activity during the early postnatal period irreversibly reduces dendritic arbor architecture, leading to long-lasting deficits in spatial exploration and/or navigation and spatial memory in the adult. During the late phase of dendritogenesis, canonical Wnt-dependent transcription regulates spine formation and maturation. We identify neurotrophin-3 as canonical Wnt target gene in regulating dendritogenesis. Our findings demonstrate how temporary imbalance in canonical Wnt signaling during specific time windows can result in irreversible dendritic defects, leading to abnormal behavior in the adult.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pyramidal Cells
/
Dendrites
/
Neurogenesis
/
Wnt Signaling Pathway
/
Spatial Memory
Type of study:
Prognostic_studies
Limits:
Animals
/
Female
/
Humans
/
Male
Language:
En
Journal:
Cell Rep
Year:
2019
Type:
Article
Affiliation country:
Switzerland