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Polyamines in rat brain extracellular space after ischemia
G M Gilad1, R A Casero, R Busto
1Neuropsychiatry Branch, NIMH Neuroscience Center at St. Elizabeths, Washington, DC 20032.
Molecular and Chemical Neuropathology
|January 1, 1993
Summary
Extracellular polyamines in rat brain striatum did not change after transient global ischemia. These findings suggest polyamine levels remain stable during the critical reperfusion period following ischemic events.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Extracellular polyamines play crucial roles in cellular functions.
- Understanding their dynamics during brain ischemia is vital for neuroprotection strategies.
Purpose of the Study:
- To quantify extracellular polyamine levels in the rat striatum.
- To investigate changes in these levels during and after transient global ischemia.
Main Methods:
- Utilized in vivo microdialysis in rat striatum.
- Collected microperfusates before, during, and after 20 minutes of global ischemia.
- Measured polyamine concentrations using reverse-phase high-performance liquid chromatography with precolumn derivatization.
Main Results:
- No significant alterations in extracellular polyamine concentrations were observed up to 3 hours post-ischemia.
- Measured polyamine levels were consistent with those found in other extracellular spaces.
Conclusions:
- Extracellular polyamine levels are maintained at low concentrations in the brain extracellular space.
- These levels do not exhibit significant changes during the early reperfusion phase after global ischemia, a period critical for neuronal survival.