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- W2005366962 abstract "α-Internexin is a type IV intermediate filament protein that is expressed abundantly in neurons during development of the peripheral and central nervous systems as well as in few neurons of the adult central nervous system. It has been suggested that α-internexin may act as a scaffold for the formation of neuronal intermediate filaments during early development. In addition, recent reports suggest that α-internexin could play a major role in two degenerative neurological disorders. We report here an analysis of mice with a targeted disruption of α-internexin gene. Unexpectedly, α-internexin −/− mice developed normally and did not exhibit overt phenotypes. Moreover, the absence of α-internexin did not interfere with neurite extension of cultured DRG neurons. The number and caliber of L4 ventral root axons remained unchanged in α-internexin −/− mice. In the retina, α-internexin begins to be expressed in retinal ganglion cells when their first axons reach the optic chiasma. Using HRP tracer, we show that the projection pattern of the RGC axons is not modified by the absence of α-internexin. Electron microscopy did not reveal significant differences in axonal calibers, in myelination of axons and in neurofilament structures between α-internexin −/− and control mice during development and at adult stage. These data indicate that α-internexin is not required for the polymerization of neurofilament in vivo. Mice deficient for both α-internexin and neurofilament light chain (NF-L) exhibited no over phenotypes as well. No intermediate filament structures were detectable in optic nerve of α-internexin −/−; NF-L −/− mice. Ours results do not support the hypothesis of a role for type IV intermediate filaments in axonal outgrowth during development of nervous system." @default.
- W2005366962 created "2016-06-24" @default.
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- W2005366962 date "1999-05-01" @default.
- W2005366962 modified "2023-09-26" @default.
- W2005366962 title "No requirement of α-internexin for nervous system development and for radial growth of axons" @default.
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- W2005366962 doi "https://doi.org/10.1016/s0169-328x(99)00104-7" @default.
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