ß-catenin signaling modulates the tempo of dendritic growth of adult-born hippocampal neurons.
EMBO J
; 39(21): e104472, 2020 11 02.
Article
en En
| MEDLINE
| ID: mdl-32929771
ABSTRACT
In adult hippocampal neurogenesis, stem/progenitor cells generate dentate granule neurons that contribute to hippocampal plasticity. The establishment of a morphologically defined dendritic arbor is central to the functional integration of adult-born neurons. We investigated the role of canonical Wnt/ß-catenin signaling in dendritogenesis of adult-born neurons. We show that canonical Wnt signaling follows a biphasic pattern, with high activity in stem/progenitor cells, attenuation in immature neurons, and reactivation during maturation, and demonstrate that this activity pattern is required for proper dendrite development. Increasing ß-catenin signaling in maturing neurons of young adult mice transiently accelerated dendritic growth, but eventually produced dendritic defects and excessive spine numbers. In middle-aged mice, in which protracted dendrite and spine development were paralleled by lower canonical Wnt signaling activity, enhancement of ß-catenin signaling restored dendritic growth and spine formation to levels observed in young adult animals. Our data indicate that precise timing and strength of ß-catenin signaling are essential for the correct functional integration of adult-born neurons and suggest Wnt/ß-catenin signaling as a pathway to ameliorate deficits in adult neurogenesis during aging.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Transducción de Señal
/
Beta Catenina
/
Hipocampo
/
Neuronas
Límite:
Animals
Idioma:
En
Revista:
EMBO J
Año:
2020
Tipo del documento:
Article
País de afiliación:
Alemania