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Dantrolene protects against ischemic, delayed neuronal death in gerbil brain
Neuroscience Letters
|August 6, 1993
Summary
Dantrolene, a drug preventing calcium release, significantly protected gerbil brain cells from ischemic damage. This suggests intracellular calcium stores are crucial for neuronal death after stroke.
Area of Science:
- Neuroscience
- Pharmacology
- Cell Biology
Background:
- Ischemic stroke causes delayed neuronal death in the hippocampus.
- Intracellular calcium (Ca) release from ryanodine receptors is implicated in this process.
- Dantrolene inhibits calcium release from these stores.
Purpose of the Study:
- To investigate the neuroprotective effects of dantrolene against ischemic delayed neuronal death.
- To determine the role of dantrolene-sensitive intracellular calcium stores in hippocampal CA1 neurons.
Main Methods:
- Transient forebrain ischemia was induced in gerbils for 3 minutes.
- Dantrolene was administered bilaterally into the lateral ventricles 30 minutes post-reperfusion.
- Neuronal survival in the hippocampal CA1 region was assessed.
Main Results:
- Dantrolene administration significantly reduced delayed neuronal death in the CA1 region.
- The drug's neuroprotective effect was observed despite delayed administration post-ischemia.
Conclusions:
- Dantrolene exhibits significant neuroprotective properties against ischemic brain injury.
- Dantrolene-sensitive intracellular calcium stores, likely ryanodine-type, play a critical role in ischemic neuronal damage in the hippocampus.