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Trauma-induced increase of extracellular ascorbate in rat cerebral cortex
L Hillered1, P Nilsson, U Ungerstedt
1Department of Neurosurgery, University Hospital, Uppsala, Sweden.
Neuroscience Letters
|June 8, 1990
Summary
Traumatic brain injury in rats caused a rapid, significant rise in extracellular ascorbate (vitamin C) levels in the cerebral cortex. This suggests a readily available intracellular source of vitamin C within the brain.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Traumatic brain injury (TBI) can lead to complex biochemical changes in the brain.
- Ascorbate (vitamin C) plays crucial roles in the central nervous system, including antioxidant and neuromodulatory functions.
Purpose of the Study:
- To investigate extracellular ascorbate concentrations in the rat cerebral cortex following cortical compression-contusion trauma.
- To explore the potential source and implications of altered ascorbate levels in TBI.
Main Methods:
- Microdialysis was used to measure extracellular ascorbate concentrations in the cerebral cortex of rats.
- Cortical compression-contusion trauma was induced in experimental animals, with comparisons to control groups.
Main Results:
- Cortical compression-contusion trauma induced a transient and significant increase in extracellular ascorbate levels compared to basal levels and controls.
- The observed increase supports the existence of a releasable intracellular pool of ascorbate in the neocortex.
Conclusions:
- The brain possesses a readily releasable intracellular pool of ascorbate in the neocortex.
- Ascorbate's potential roles in modulating traumatic brain damage, possibly via neuromodulation or lipid peroxidation, warrant further investigation.