Translational profiling of retinal ganglion cell optic nerve regeneration in Xenopus laevis.

Translational profiling of retinal ganglion cell optic nerve regeneration in Xenopus laevis.
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DOI:
10.1016/j.ydbio.2016.06.003
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发表时间:
2017-06-15
影响因子:
2.7
通讯作者:
Watson FL
Watson FL
中科院分区:
生物学3区
文献类型:
--
作者:
Whitworth GB;Misaghi BC;Rosenthal DM;Mills EA;Heinen DJ;Watson AH;Ives CW;Ali SH;Bezold K;Marsh-Armstrong N;Watson FL

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Unlike adult mammals, adult frogs regrow their optic nerve following a crush injury, making Xenopus laevis a compelling model for studying the molecular mechanisms that underlie neuronal regeneration. Using Translational Ribosome Affinity Purification (TRAP), a method to isolate ribosome-associated mRNAs from a target cell population, we have generated a transcriptional profile by RNA-Seq for retinal ganglion cells (RGC) during the period of recovery following an optic nerve injury. Based on bioinformatic analysis using the Xenopus laevis 9.1 genome assembly, our results reveal a profound shift in the composition of ribosome-associated mRNAs during the early stages of RGC regeneration. As factors involved in cell signaling are rapidly down-regulated, those involved in protein biosynthesis are up-regulated alongside key initiators of axon development. Using the new genome assembly, we were also able to analyze gene expression profiles of homeologous gene pairs arising from a whole-genome duplication in the Xenopus lineage. Here we see evidence of divergence in regulatory control among a significant proportion of pairs. Our data should provide a valuable resource for identifying genes involved in the regeneration process to target for future functional studies, in both naturally regenerative and non-regenerative vertebrates.
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