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- W1966610111 abstract "Development of the cerebellum involves a coordinated program of neuronal process outgrowth and migration resulting in a foliated structure that plays a key role in motor function. Neuron navigator 2 (Nav2) is a cytoskeletal-interacting protein that functions in neurite outgrowth and axonal elongation. Herein we show that hypomorphic mutant mice lacking the full-length Nav2 transcript exhibit ataxia and defects in cerebellar development. At embryonic day (E)17.5, the mutant cerebellum is reduced in size and exhibits defects in vermal foliation. Reduction in cell proliferation at early times (E12.5 and E14.5) may contribute to this size reduction. The full-length Nav2 transcript is expressed in the premigratory zone of the external granule layer (EGL). Granule cells in the germinal zone of the EGL appear to proliferate normally, however, due to the reduction in cerebellar circumference there are fewer total BrdU-labeled granule cells in the mutants, and these fail to migrate normally toward the interior of the cerebellum. In Nav2 hypomorphs, fewer granule cells migrate out of cerebellar EGL explants and neurite outgrowth from both explants and isolated external granule cell cultures is reduced. This suggests that the formation of parallel axon fibers and neuronal migration is disrupted in Nav2 mutants. This work supports an essential role for full-length Nav2 in cerebellar development, including axonal elongation and migration of the EGL neurons." @default.
- W1966610111 created "2016-06-24" @default.
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- W1966610111 date "2011-05-01" @default.
- W1966610111 modified "2023-10-16" @default.
- W1966610111 title "Nav2 hypomorphic mutant mice are ataxic and exhibit abnormalities in cerebellar development" @default.
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- W1966610111 doi "https://doi.org/10.1016/j.ydbio.2011.03.008" @default.
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