Bergmann Glia and the Recognition Molecule CHL1 Organize GABAergic Axons and Direct Innervation of Purkinje Cell Dendrites

Ango, F., Wu, C., Van der Want, J. J., Wu, P., Schachner, M., Huang, Z. J. (2008) Bergmann Glia and the Recognition Molecule CHL1 Organize GABAergic Axons and Direct Innervation of Purkinje Cell Dendrites. PLoS Biology, 6 (4). e103.

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URL: https://www.ncbi.nlm.nih.gov/pubmed/18447583
DOI: 10.1371/journal.pbio.0060103

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.

Item Type: Paper
Subjects: organs, tissues, organelles, cell types and functions > tissues types and functions > axon
organs, tissues, organelles, cell types and functions > cell types and functions
organism description > animal > mammal > rodent > mouse
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
CSHL Authors:
Communities: CSHL labs > Huang lab
Depositing User: CSHL Librarian
Date Deposited: 10 Apr 2012 18:55
Last Modified: 10 Jan 2017 15:42
PMCID: PMC2689695
Related URLs:
URI: http://repository.cshl.edu/id/eprint/25787

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