Quantitative Proteomics After Spinal Cord Injury (SCI) in a Regenerative and a Nonregenerative Stage in the Frog Xenopus laevis.
Mol Cell Proteomics
; 17(4): 592-606, 2018 04.
Article
in En
| MEDLINE
| ID: mdl-29358338
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Regeneration
/
Spinal Cord
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Spinal Cord Injuries
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Xenopus laevis
/
Amphibian Proteins
Limits:
Animals
Language:
En
Journal:
Mol Cell Proteomics
Journal subject:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
Year:
2018
Document type:
Article
Affiliation country:
Chile
Country of publication:
United States