Dscam-mediated repulsion controls tiling and self-avoidance

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Dscam-mediated repulsion controls tiling and self-avoidance.

Recent studies have uncovered the molecular basis of self-avoidance and tiling, two fundamental principles required for the formation of neural circuits. Both of these wiring strategies are established through homophilic repulsion between Dscam proteins expressed on opposing cell surfaces. In Drosophila, Dscam1 mediates self-avoidance, whereas Dscam2 mediates tiling. By contrast, phenotypes in ...

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Dendrite Self-Avoidance Is Controlled by Dscam

Dendrites distinguish between sister branches and those of other cells. Self-recognition can often lead to repulsion, a process termed "self-avoidance." Here we demonstrate that dendrite self-avoidance in Drosophila da sensory neurons requires cell-recognition molecules encoded by the Dscam locus. By alternative splicing, Dscam encodes a vast number of cell-surface proteins of the immunoglobuli...

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Drosophila Sensory Neurons Require Dscam for Dendritic Self-Avoidance and Proper Dendritic Field Organization

A neuron's dendrites typically do not cross one another. This intrinsic self-avoidance mechanism ensures unambiguous processing of sensory or synaptic inputs. Moreover, some neurons respect the territory of others of the same type, a phenomenon known as tiling. Different types of neurons, however, often have overlapping dendritic fields. We found that Down's syndrome Cell Adhesion Molecule (Dsc...

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ژورنال

عنوان ژورنال: Current Opinion in Neurobiology

سال: 2008

ISSN: 0959-4388

DOI: 10.1016/j.conb.2008.05.005