Integrins Establish Dendrite-Substrate Relationships that Promote Dendritic Self-Avoidance and Patterning in Drosophila Sensory Neurons
| Autor: | Wesley B. Grueber, Richard Blazeski, Carol A. Mason, Michelle E. Kim, Brikha R. Shrestha |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
0303 health sciences
Dendritic spine Epidermis (botany) Neuroscience(all) General Neuroscience Integrin Dendrite Sensory system Biology Substrate (biology) Cell biology 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Dendritic Arborization Cell autonomous medicine biology.protein 030217 neurology & neurosurgery 030304 developmental biology |
| Zdroj: | Neuron. 73:79-91 |
| ISSN: | 0896-6273 |
| DOI: | 10.1016/j.neuron.2011.10.033 |
| Popis: | SummaryDendrites achieve characteristic spacing patterns during development to ensure appropriate coverage of territories. Mechanisms of dendrite positioning via repulsive dendrite-dendrite interactions are beginning to be elucidated, but the control, and importance, of dendrite positioning relative to their substrate is poorly understood. We found that dendritic branches of Drosophila dendritic arborization sensory neurons can be positioned either at the basal surface of epidermal cells, or enclosed within epidermal invaginations. We show that integrins control dendrite positioning on or within the epidermis in a cell autonomous manner by promoting dendritic retention on the basal surface. Loss of integrin function in neurons resulted in excessive self-crossing and dendrite maintenance defects, the former indicating a role for substrate interactions in self-avoidance. In contrast to a contact-mediated mechanism, we find that integrins prevent crossings that are noncontacting between dendrites in different three-dimensional positions, revealing a requirement for combined dendrite-dendrite and dendrite-substrate interactions in self-avoidance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|