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Early membrane lipid changes in laminectomized and traumatized cat spinal cord
P Demediuk1, R D Saunders, D K Anderson
1Department of Physiological Chemistry, Ohio State University, Columbus.
Neurochemical Pathology
|August 1, 1987
Summary
Surgical procedures like laminectomy and spinal cord compression significantly alter membrane lipid metabolism in cats. These changes involve increases in free fatty acids and eicosanoids, particularly in gray matter.
Area of Science:
- Neuroscience
- Biochemistry
- Surgical Research
Background:
- Spinal cord injury (SCI) involves complex biochemical changes.
- Understanding lipid metabolism alterations is crucial for SCI research.
Purpose of the Study:
- To investigate the impact of surgical exposure and compression trauma on feline spinal cord membrane lipid metabolism.
- To differentiate the effects of laminectomy versus compression on lipid profiles.
Main Methods:
- Feline spinal cord tissue samples were collected post-laminectomy and/or compression.
- Tissue was dissected into gray and white matter portions.
- Lipid analyses were performed to quantify various lipid classes.
Main Results:
- Laminectomy alone increased gray matter free fatty acids, diacylglycerols, and eicosanoids, with levels decreasing after recovery.
- Spinal cord compression caused substantial increases in gray matter free fatty acids, diacylglycerols, and eicosanoids.
- Compression also led to decreased cholesterol and ethanolamine plasmalogens in gray matter.
- White matter exhibited similar, but delayed, changes in lipid profiles following compression.
Conclusions:
- Both laminectomy and spinal cord compression significantly disrupt membrane lipid metabolism in the feline spinal cord.
- Compression trauma induces more severe and widespread lipid alterations than laminectomy alone.
- These findings highlight the biochemical consequences of spinal cord trauma and surgical intervention.