Skip to Main content Skip to Navigation
Journal articles

Bergmann glia and the recognition molecule CHL1 organize GABAergic axons and direct innervation of Purkinje cell dendrites.

Abstract : The geometric and subcellular organization of axon arbors distributes and regulates electrical signaling in neurons and networks, but the underlying mechanisms have remained elusive. In rodent cerebellar cortex, stellate interneurons elaborate characteristic axon arbors that selectively innervate Purkinje cell dendrites and likely regulate dendritic integration. We used GFP BAC transgenic reporter mice to examine the cellular processes and molecular mechanisms underlying the development of stellate cell axons and their innervation pattern. We show that stellate axons are organized and guided towards Purkinje cell dendrites by an intermediate scaffold of Bergmann glial (BG) fibers. The L1 family immunoglobulin protein Close Homologue of L1 (CHL1) is localized to apical BG fibers and stellate cells during the development of stellate axon arbors. In the absence of CHL1, stellate axons deviate from BG fibers and show aberrant branching and orientation. Furthermore, synapse formation between aberrant stellate axons and Purkinje dendrites is reduced and cannot be maintained, leading to progressive atrophy of axon terminals. These results establish BG fibers as a guiding scaffold and CHL1 a molecular signal in the organization of stellate axon arbors and in directing their dendritic innervation.
Complete list of metadatas

Cited literature [66 references]  Display  Hide  Download

https://www.hal.inserm.fr/inserm-00707838
Contributor : Delphine Autard <>
Submitted on : Wednesday, June 13, 2012 - 3:52:55 PM
Last modification on : Tuesday, October 20, 2020 - 5:00:04 PM
Long-term archiving on: : Friday, September 14, 2012 - 2:36:35 AM

File

journal.pbio.0060103.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Fabrice Ango, Caizhi Wu, Johannes van der Want, Priscilla Wu, Melitta Schachner, et al.. Bergmann glia and the recognition molecule CHL1 organize GABAergic axons and direct innervation of Purkinje cell dendrites.. PLoS Biology, Public Library of Science, 2008, 6 (4), pp.e103. ⟨10.1371/journal.pbio.0060103⟩. ⟨inserm-00707838⟩

Share

Metrics

Record views

251

Files downloads

482