Zonisamide ameliorates progression of cervical spondylotic myelopathy in a rat model
Autor: | Hiroyuki Koshimizu, Taro Inoue, Kyotaro Ohta, Hiroaki Nakashima, Kinji Ohno, Bisei Ohkawara, Shiro Imagama, Hiroyuki Tomita, Naoki Ishiguro, Shunsuke Kanbara, Akio Masuda, Mikako Ito |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
0301 basic medicine
Pathology medicine.medical_specialty Zonisamide Spinal cord diseases lcsh:Medicine Spinal cord injury medicine.disease_cause Article 03 medical and health sciences Myelopathy Epilepsy 0302 clinical medicine Oral administration Medicine Animals Rats Wistar lcsh:Science Motor Neurons Multidisciplinary Pyramidal tracts business.industry lcsh:R Glutamate receptor medicine.disease Spinal cord Drug regulation Rats Disease Models Animal 030104 developmental biology medicine.anatomical_structure Cervical Vertebrae Disease Progression Female lcsh:Q Spondylosis business Spinal Cord Compression 030217 neurology & neurosurgery Oxidative stress medicine.drug |
Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020) Scientific Reports |
ISSN: | 2045-2322 |
Popis: | Cervical spondylotic myelopathy (CSM) is caused by chronic compression of the spinal cord and is the most common cause of myelopathy in adults. No drug is currently available to mitigate CSM. Herein, we made a rat model of CSM by epidurally implanting an expanding water-absorbent polymer underneath the laminae compress the spinal cord. The CSM rats exhibited progressive motor impairments recapitulating human CSM. CSM rats had loss of spinal motor neurons, and increased lipid peroxidation in the spinal cord. Zonisamide (ZNS) is clinically used for epilepsy and Parkinson's disease. We previously reported that ZNS protected primary spinal motor neurons against oxidative stress. We thus examined the effects of ZNS on our rat CSM model. CSM rats with daily intragastric administration of 0.5% methylcellulose (n = 11) and ZNS (30 mg/kg/day) in 0.5% methylcellulose (n = 11). Oral administration of ZNS ameliorated the progression of motor impairments, spared the number of spinal motor neurons, and preserved myelination of the pyramidal tracts. In addition, ZNS increased gene expressions of cystine/glutamate exchange transporter (xCT) and metallothionein 2A in the spinal cord in CSM rats, and also in the primary astrocytes. ZNS increased the glutathione (GSH) level in the spinal motor neurons of CSM rats. ZNS potentially ameliorates loss of the spinal motor neurons and demyelination of the pyramidal tracts in patients with CSM. |
Databáze: | OpenAIRE |
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