Abstract:
: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.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Whitworth GB,Misaghi BC,Rosenthal DM,Mills EA,Heinen DJ,Watson AH,Ives CW,Ali SH,Bezold K,Marsh-Armstrong N,Watson FLdoi
10.1016/j.ydbio.2016.06.003subject
Has Abstractpub_date
2017-06-15 00:00:00pages
360-373issue
2eissn
0012-1606issn
1095-564Xpii
S0012-1606(16)30089-6journal_volume
426pub_type
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