Wnt7b signalling through Frizzled-7 receptor promotes dendrite development by coactivating CaMKII and JNK.

Autor:	Ferrari ME; Laboratorio de Toxicología Experimental, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina.; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 2000 - Rosario, Argentina., Bernis ME; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 2000 - Rosario, Argentina.; Departamento de Química Biológica-CIQUIBIC, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba-CONICET, 5000 - Córdoba, Argentina., McLeod F; Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK., Podpolny M; Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK., Coullery RP; Laboratorio de Toxicología Experimental, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina.; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 2000 - Rosario, Argentina., Casadei IM; Laboratorio de Toxicología Experimental, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina.; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 2000 - Rosario, Argentina., Salinas PC; Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK., Rosso SB; Laboratorio de Toxicología Experimental, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina srosso@fbioyf.unr.edu.ar.; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 2000 - Rosario, Argentina.
Jazyk:	angličtina
Zdroj:	Journal of cell science [J Cell Sci] 2018 Jul 09; Vol. 131 (13). Date of Electronic Publication: 2018 Jul 09.
DOI:	10.1242/jcs.216101
Abstrakt:	The formation of complex dendritic arbors is crucial for the assembly of functional networks as abnormal dendrite formation underlies several neurodevelopmental and psychiatric disorders. Many extracellular factors have been postulated as regulators of dendritic growth. Wnt proteins play a critical role in neuronal development and circuit formation. We previously demonstrated that Wnt7b acts through the scaffold protein dishevelled 1 (Dvl1) to modulate dendrite arborisation by activating a non-canonical Wnt signalling pathway. Here, we identify the seven-transmembrane frizzled-7 (Fz7, also known as FZD7) as the receptor for Wnt7b-mediated dendrite growth and complexity. Importantly, Fz7 is developmentally regulated in the intact hippocampus, and is localised along neurites and at dendritic growth cones, suggesting a role in dendrite formation and maturation. Fz7 loss-of-function studies demonstrated that Wnt7b requires Fz7 to promote dendritic arborisation. Moreover, in vivo Fz7 loss of function results in dendritic defects in the intact mouse hippocampus. Furthermore, our findings reveal that Wnt7b and Fz7 induce the phosphorylation of Ca 2+ /calmodulin-dependent protein kinase II (CaMKII) and JNK proteins, which are required for dendritic development. Here, we demonstrate that Wnt7b-Fz7 signals through two non-canonical Wnt pathways to modulate dendritic growth and complexity. Competing Interests: Competing interestsThe authors declare no competing or financial interests. (© 2018. Published by The Company of Biologists Ltd.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu