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The mouse median nerve experimental model in regenerative research

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  • Sara Buskbjerg Jager
  • Giulia Ronchi, Department of Clinical and Biological Sciences, Neuroscience Institute of the "Cavalieri Ottolenghi" Foundation (NICO), University of Turin, 10 Regione Gonzole, Orbassano, 10043 Turin, Italy., Unknown
  • Christian Bjerggaard Vægter
  • Stefano Geuna, Department of Clinical and Biological Sciences, Neuroscience Institute of the "Cavalieri Ottolenghi" Foundation (NICO), University of Turin, 10 Regione Gonzole, Orbassano, 10043 Turin, Italy., Unknown

Sciatic nerve crush injury in rat animal model is one of the most common experimental models used in regenerative research. However, the availability of transgenic mouse for nerve regeneration studies is constantly increasing and, therefore, the shift from rat model to mouse model is, in some cases, necessary. Moreover, since most of the human nerve lesions occur in the upper limb, it is also advantageous to shift from sciatic nerve to median nerve. In this study we described an experimental model which involves lesions of the median nerve in the mouse. Data showed that the finger flexor muscle contraction strength, assessed to evaluate the motor function recovery, and reached values not different from the control already 20 days after injury. The degree of nerve regeneration evaluated with stereological methods in light microscopy showed that, 25 days after injury, the number of regenerated myelinated fibers was comparable to the control, but they were smaller with a thinner myelin thickness. Stereological analysis made in electron microscopy confirmed these results, although the total number of fibers quantified was significantly higher compared to light microscopy analysis, due to the very small size of some fibers that can be detected only in electron microscopy.

Original languageEnglish
Article number701682
JournalBioMed Research International
Volume2014
Number of pages6
ISSN2314-6133
DOIs
Publication statusPublished - 2014

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