Dendrite morphogenesis depends on relative levels of NT-3/TrkC signaling Journal Article

Author(s): William, Joo; Hippenmeyer, Simon; Luo, Liqun
Article Title: Dendrite morphogenesis depends on relative levels of NT-3/TrkC signaling
Affiliation IST Austria
Abstract: Neurotrophins regulate diverse aspects of neuronal development and plasticity, but their precise in vivo functions during neural circuit assembly in the central brain remain unclear. We show that the neurotrophin receptor tropomyosin-related kinase C (TrkC) is required for dendritic growth and branching of mouse cerebellar Purkinje cells. Sparse TrkC knockout reduced dendrite complexity, but global Purkinje cell knockout had no effect. Removal of the TrkC ligand neurotrophin-3 (NT-3) from cerebellar granule cells, which provide major afferent input to developing Purkinje cell dendrites, rescued the dendrite defects caused by sparse TrkC disruption in Purkinje cells. Our data demonstrate that NT-3 from presynaptic neurons (granule cells) is required for TrkC-dependent competitive dendrite morphogenesis in postsynaptic neurons (Purkinje cells)—a previously unknown mechanism of neural circuit development.
Journal Title: Science
Volume: 346
Issue 6209
ISSN: 0036-8075
Publisher: American Association for the Advancement of Science  
Date Published: 2014-10-31
Start Page: 626
End Page: 629
DOI: 10.1126/science.1258996
Open access: yes (repository)