Simple model of forebrain ischemia in mouse.

Area of Science:

• Neuroscience
• Ischemic Stroke Research
• Animal Models

Background:

• Genetically engineered mice are crucial for studying ischemic brain injury mechanisms.
• Existing mouse models of global cerebral ischemia are complex due to vascular variability.

Purpose of the Study:

• To describe a simplified mouse model for inducing forebrain ischemia.
• To establish a reproducible method for studying ischemic brain injury in mice.

Main Methods:

• Forebrain ischemia induced by bilateral common carotid artery occlusion (BCCO) combined with isoflurane-induced hypotension.
• Mean arterial blood pressure reduced to ~30mmHg, causing cerebral blood flow to drop to 5% of control.
• Histologic analysis performed after 1, 2, 3, or 5 days of survival following a 10-minute ischemic period.

Main Results:

• Neurodegeneration observed 2 days post-reperfusion.
• Approximately 40% of CA1 neurons survived at 3 days, with no further increase in cell death at 5 days.
• Degenerative neurons detected in the striatum and cortex.

Conclusions:

• The described BCCO and hypotension model is feasible for inducing forebrain ischemia in mice.
• This model can be used to test neuroprotective compounds and investigate hypotheses using transgenic animals.