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Calcium entry blocker ameliorates ischemic neuronal damage in monkey hippocampus
1Department of Physiology, Toyama Medical and Pharmaceutical University, Japan.
Brain Research Bulletin
|September 1, 1992
Summary
Postischemic treatment with NC-1100, a calcium entry blocker, significantly reduced ischemic neuronal damage in the hippocampus CA1 subfield in a primate model. This suggests potential neuroprotective effects for transient ischemia patients.
Area of Science:
- Neuroscience
- Pharmacology
- Ischemic Stroke Research
Background:
- Ischemic neuronal damage, particularly in the hippocampus, is a critical consequence of transient ischemia.
- Calcium entry blockers are investigated for their potential to mitigate such damage.
Purpose of the Study:
- To evaluate the neuroprotective effects of NC-1100, a novel calcium entry blocker, against ischemic neuronal damage.
- To determine the efficacy of NC-1100 in a primate model of transient cerebral ischemia.
Main Methods:
- Monkeys underwent temporary occlusion of eight major arteries, followed by reperfusion.
- NC-1100 (1 mg/kg) was administered intravenously immediately after reperfusion.
- Histological examination of brain regions, focusing on the hippocampus CA1 subfield, was performed 5 days post-occlusion.
Main Results:
- Ischemic neuronal damage was predominantly observed in the hippocampus CA1 subfield following 10-15 minutes of arterial occlusion.
- NC-1100 treatment significantly reduced the extent of ischemic neuronal damage in the CA1 subfield.
- Physiological parameters, including heart rate, showed no significant adverse effects from NC-1100 treatment.
Conclusions:
- Postischemic administration of NC-1100 demonstrates significant neuroprotective effects against transient ischemic brain damage.
- NC-1100 holds promise as a therapeutic agent for protecting the brain from damage associated with transient ischemic events.