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Alpha 1-tubulin mRNA level is increased during neurite outgrowth of NG 108-15 cells but not during neurite outgrowth inhibition by CNS myelin



Alpha 1-tubulin mRNA level is increased during neurite outgrowth of NG 108-15 cells but not during neurite outgrowth inhibition by CNS myelin



Neuroreport 8(3): 795-798



alpha 1-tubulin is an isotype of alpha-tubulin, and its mRNA is expressed in the rodent nervous system. A high level of alpha 1-tubulin mRNA in neurones is associated with axonal outgrowth during development as well as with axonal regeneration after axotomy in adult animals. We quantitated alpha 1-tubulin mRNA levels in motor neurone-like NG 108-15 cells using Northern blots in order to determine whether the expression of this neurite outgrowth-associated gene is regulated in NG 108-15 cells during neurite extension and during inhibition of this process by CNS myelin. Here we report that during the acute phase of neurite outgrowth, alpha 1-tubulin mRNA level increases in NG 108-15, a maximal induction of 1.7-fold over the initial level occurring 24 h after neurite outgrowth onset. By contrast, when these cells are plated on CNS myelin alpha 1-tubulin mRNA levels show no such increase. These findings indicate that an increase of the alpha 1-tubulin mRNA level is associated with neurite outgrowth of NG 108-15 cells. More interestingly, this study also demonstrates that the inhibition of neurite outgrowth by CNS myelin may affect the expression of a gene encoding a protein involved in neurite extension.

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Accession: 045203891

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PMID: 9106769


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