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Chronic spinal nerve ligation induces microvascular permeability disturbances, astrocytic reaction, and structural changes in the rat spinal cord

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Brain Edema XIII

Part of the book series: Acta Neurochirurgica Supplementum ((NEUROCHIRURGICA,volume 96))

Summary

The possibility that a chronic nerve ligation impairs the spinal cord cellular microenvironment was examined using leakage of endogenous albumin, reaction of astrocytes, and structural changes in a rat model. Rats subjected to 8 weeks of unilateral L4/L5 nerve ligation (a model of neuropathic pain) showed leakage of albumin, up-regulation of glial fibrillary acidic protein (GFAP) immunoreaction, and abnormal cell reaction. Distortion and loss of nerve cells as well as general sponginess of the gray matter was clearly evident. Cell changes were present in both dorsal and ventral horns and were most marked on the ipsilateral side compared to the contralateral cord. Nerve cell and glial cell changes are normally present in the regions showing intense albumin immunoreactivity, indicating disruption of the blood-spinal cord barrier (BSCB). Our observations indicate that a chronic nerve lesion has the capacity to induce selective breakdown of the BSCB that could be responsible for activation of astrocytes and abnormal cell reaction. These findings enhance our understanding of the pathophysiology of neuropathic pain and/or other spinal cord disorders.

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© 2006 Springer-Verlag

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Gordh, T., Sharma, H.S. (2006). Chronic spinal nerve ligation induces microvascular permeability disturbances, astrocytic reaction, and structural changes in the rat spinal cord. In: Hoff, J.T., Keep, R.F., Xi, G., Hua, Y. (eds) Brain Edema XIII. Acta Neurochirurgica Supplementum, vol 96. Springer, Vienna. https://doi.org/10.1007/3-211-30714-1_70

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  • DOI: https://doi.org/10.1007/3-211-30714-1_70

  • Publisher Name: Springer, Vienna

  • Print ISBN: 978-3-211-30712-0

  • Online ISBN: 978-3-211-30714-4

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