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Correlation of alterations on Na+−K+/Mg+2 ATPase activity, lipid peroxidation and ultrastructural findings following experimental spinal cord injury with and without intravenous methylprednisolone treatment

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Abstract

The sodium-potassium activated and magnesium dependent adenosine-5′-triphosphatase (Na+−K+/Mg+2 ATPase EC 3.6.1.3.) activity and lipid peroxidation and early ultrastructural findings are determined in rat spinal cord at the early stage of trauma produced by a surgical clip on the thoracal 2–7 segments. The effect of treatment with intravenous methylprednisolone (MP) was evaluated the basis of these biochemical alterations and ultrastructural findings in the same model. The specific activity of the membrane bound enzyme Na+−K+/Mg+2 ATPase was promptly reduced in as early as ten minutes following spinal cord injury and remained at a level lower than the levels in the control group and in the sham-operated group. Methylprednisolone treatment immediately after the trauma attenuated the inactivation of Na+−K+/Mg+2 ATPase. On the other hand, there was significant difference in lipid peroxide content between the sham-operated and the injured animals. Methylprednisolone treatment reduced thiobarbituric acid reactive substance (TBARS) content in Group IV. We determined a positive relationship among membrane-bound enzyme Na+ K+/Mg+2 ATPase activity, malondialdehyde (MDA) content and early ultrastructural changes in the traumatized and treated groups.

These data provide evidence for a beneficial effect of methylprednisolone on the activation of Na+−K+/Mg+2 ATPase and lipid peroxidation and early ultrastructural changes in spinal cord injured rats. The possible mechanism of methylprednisolone effects on the membrane function and lipid peroxidation, and the correlation of biochemical changes with ultrastructural findings are briefly discussed.

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Authors and Affiliations

  1. Department of Neurosurgery, Çukurova University, School of Medicine, Balcali, Adana, Turkey

    Faruk İldan, A. İskender Göcer & Askin Karaday

  2. Dept. of Biochemistry, Çukurova University, School of Medicine, Balcali, Adana, Turkey

    Ayse Öner & Turgay İsbir

  3. Dept. of Histology, Çukurova University, School of Medicine, Balcali, Adana, Turkey

    Sait Polat & Mehmet Kaya

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  1. Faruk İldan
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  2. Ayse Öner
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  5. A. İskender Göcer
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İldan, F., Öner, A., Polat, S. et al. Correlation of alterations on Na+−K+/Mg+2 ATPase activity, lipid peroxidation and ultrastructural findings following experimental spinal cord injury with and without intravenous methylprednisolone treatment. Neurosurg. Rev. 18, 35–44 (1995). https://doi.org/10.1007/BF00416476

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  • DOI: https://doi.org/10.1007/BF00416476

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