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Non cell-autonomous processes are thought to play critical roles in the cellular maintenance of the healthy and diseased brain but mechanistic details remain unclear. We report that the interruption of a non cell-autonomous mode of sonic hedgehog (Shh) signaling originating from dopaminergic neurons causes progressive, adult-onset degeneration of dopaminergic, cholinergic, and fast spiking GABAergic...
Establishment of limb innervation by motor neurons involves a series of hierarchical axon guidance decisions by which motor-neuron subtypes evaluate peripheral guidance cues and choose their axonal trajectory. Earlier work indicated that the pathway into the dorsal limb by lateral motor column (LMC[l]) axons requires the EphA4 receptor, which mediates repulsion elicited by ephrinAs expressed in ventral...
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