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Hyperthermic preconditioning protects against spinal cord ischemic injury
P Zhang1, V S Abraham, K R Kraft
1Gill Heart Institute and Sanders-Brown Center on Aging, University of Kentucky College of Medicine, Lexington, USA.
The Annals of Thoracic Surgery
|November 28, 2000
Summary
Hyperthermic preconditioning before spinal cord ischemia significantly reduced permanent spinal cord injury and immediate paraplegia in rats. This neuroprotective strategy improved clinical outcomes following aortic occlusion.
Area of Science:
- Neuroscience
- Surgical Research
- Ischemia Research
Background:
- Paraplegia can occur after surgeries involving temporary thoracic aorta occlusion.
- Investigating neuroprotective strategies against spinal cord ischemia is crucial.
Purpose of the Study:
- To determine if hyperthermic preconditioning offers neuroprotection against spinal cord ischemia.
- To evaluate the impact of preconditioning on neurologic and histologic outcomes.
Main Methods:
- Rats underwent either hyperthermic preconditioning (41°C for 15 min) or served as controls.
- Spinal cord ischemia was induced for 10 minutes via aortic occlusion.
- Neurologic scores and histologic damage were assessed post-ischemia.
Main Results:
- Hyperthermic preconditioning reduced permanent spinal cord injury (29.6% vs. 59.4%, p=0.02).
- The incidence of immediate paraplegia was significantly lower in the preconditioned group (3.7% vs. 28.1%, p=0.03).
- Histologic scores correlated with neurologic outcome in rats with permanent injury.
Conclusions:
- Hyperthermic preconditioning before spinal cord ischemia demonstrates significant neuroprotective effects.
- This preconditioning strategy improves clinical outcomes in a rat model of aortic ischemia.