When a diffusible axon guidance cue stops diffusing: roles for netrins in adhesion and morphogenesis |
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Authors: | Baker K Adam Moore Simon W Jarjour Andrew A Kennedy Timothy E |
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Institution: | Centre for Neuronal Survival, Montréal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, H3A 2B4, Canada. |
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Abstract: | Netrins are a small family of secreted proteins that are best known for their role as secreted long-range chemotropic guidance cues. Extracellular gradients of netrin protein, established by diffusion, are thought to direct cell and axon migration during neural development. In addition to this long-range role, recent findings provide increasing support for short-range functions, in which secreted netrin protein remains closely associated with its cellular source. Emerging evidence for short-range actions of netrins suggests that they contribute to tissue morphogenesis by regulating cell-cell and cell-matrix adhesion. |
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