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Mol Cell Proteomics 2018 Apr 01;174:592-606. doi: 10.1074/mcp.RA117.000215.
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Quantitative Proteomics After Spinal Cord Injury (SCI) in a Regenerative and a Nonregenerative Stage in the Frog Xenopus laevis.

Lee-Liu D , Sun L , Dovichi NJ , Larraín J .

The capacity to regenerate the spinal cord after an injury is a coveted trait that only a limited group of nonmammalian organisms can achieve. In Xenopus laevis, this capacity is only present during larval or tadpole stages, but is absent during postmetamorphic frog stages. This provides an excellent model for comparative studies between a regenerative and a nonregenerative stage to identify the cellular and molecular mechanisms that explain this difference in regenerative potential. Here, we used iTRAQ chemistry to obtain a quantitative proteome of the spinal cord 1 day after a transection injury in regenerative and nonregenerative stage animals, and used sham operated animals as controls. We quantified a total of 6,384 proteins, with 172 showing significant differential expression in the regenerative stage and 240 in the nonregenerative stage, with an overlap of only 14 proteins. Functional enrichment analysis revealed that although the regenerative stage downregulated synapse/vesicle and mitochondrial proteins, the nonregenerative stage upregulated lipid metabolism proteins, and downregulated ribosomal and translation control proteins. Furthermore, STRING network analysis showed that proteins belonging to these groups are highly interconnected, providing interesting candidates for future functional studies. Data are available via ProteomeXchange with identifier PXD006993.

PubMed ID: 29358338
PMC ID: PMC5880103
Article link: Mol Cell Proteomics
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: a2m alb apoa1 dynll1 f2 fat1 fga fgb fgg gap43 hbz hrg mtdh nucb1 plaa rpl21 serpina3 tf trarg1 tsc2 vtn
GO keywords: vasculature development [+]

Article Images: [+] show captions
References [+] :
Becker, Neuronal regeneration from ependymo-radial glial cells: cook, little pot, cook! 2015, Pubmed