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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Török, C. Frisén, J. Johansson, C. B. Lendahl, U. Risling, M. |
| Description | Author Affiliation: Frisén J ( Department of Neuroscience, Karolinska Institute, Stockholm, Sweden.) |
| Abstract | Neuronal regeneration does generally not occur in the central nervous system (CNS) after injury, which has been attributed to the generation of glial scar tissue. In this report we show that the composition of the glial scar after traumatic CNS injury in rat and mouse is more complex than previously assumed: expression of the intermediate filament nestin is induced in reactive astrocytes. Nestin induction occurs within 48 hours in the spinal cord both at the site of lesion and in degenerating tracts and lasts for at least 13 months. Nestin expression is induced with similar kinetics in the crushed optic nerve. In addition to the expression in reactive astrocytes, we also observed nestin induction within 48 hours after injury in cells close to the central canal in the spinal cord, while nestin expressing cells at later timepoints were found progressively further out from the central canal. This dynamic pattern of nestin induction after injury was mimicked by lacZ expressing cells in nestin promoter/lacZ transgenic mice, suggesting that defined nestin regulatory regions mediate the injury response. We discuss the possibility that the spatiotemporal pattern of nestin expression reflects a population of nestin positive cells, which proliferates and migrates from a region close to the central canal to the site of lesion in response to injury. |
| ISSN | 00219525 |
| e-ISSN | 15408140 |
| Journal | The Journal of Cell Biology |
| Issue Number | 2 |
| Volume Number | 131 |
| Language | English |
| Publisher | Rockefeller University Press (United States) |
| Publisher Date | 1995-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Astrocytes Metabolism Central Nervous System Injuries Intermediate Filament Proteins Nerve Tissue Proteins Wound Healing Animals Pathology Biological Markers Cell Count Cells, Cultured Cicatrix Fluorescent Antibody Technique, Indirect Biosynthesis Mice Mice, Inbred C57BL Nestin Rats, Wistar Research Support, Non-U.S. Gov't Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Medicine |
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