Focal laser-lesions activate an endogenous population of neural stem/progenitor cells in the adult visual cortex

Brain. 2009 Aug;132(Pt 8):2252-64. doi: 10.1093/brain/awp043. Epub 2009 Mar 13.

Abstract

CNS lesions stimulate adult neurogenic niches. Endogenous neural stem/progenitor cells represent a potential resource for CNS regeneration. Here, we investigate the response to unilateral focal laser-lesions applied to the visual cortex of juvenile rats. Within 3 days post-lesion, an ipsilateral increase of actively cycling cells was observed in cortical layer one and in the callosal white matter within the lesion penumbra. The cells expressed the neural stem/progenitor cell marker Nestin and the 473HD-epitope. Tissue prepared from the lesion area by micro-dissection generated self-renewing, multipotent neurospheres, while cells from the contralateral visual cortex did not. The newly formed neural stem/progenitor cells in the lesion zone might support neurogenesis, as suggested by the expression of Pax6 and Doublecortin, a marker of newborn neurons. We propose that focal laser-lesions may induce the emergence of stem/progenitor cells with neurogenic potential. This could underlie the beneficial effects of laser application in neurosurgery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Proliferation
  • Cells, Cultured
  • Doublecortin Protein
  • Laser Therapy / methods*
  • Multipotent Stem Cells / pathology
  • Nerve Regeneration / physiology*
  • Neurogenesis / physiology
  • Neuronal Plasticity / physiology
  • Rats
  • Rats, Wistar
  • Stem Cells / physiology*
  • Visual Cortex / pathology
  • Visual Cortex / physiology
  • Visual Cortex / surgery*