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Developing a Ministroke Model in Mouse Barrel Cortex.

Song Wang1, Sichen Wang2, Yuhan Sun2

  • 1Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.

Bio-Protocol
|May 21, 2025
PubMed
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Researchers developed a novel ministroke model in mice targeting the barrel cortex. This reproducible model offers a valuable tool for studying minor strokes and stroke recurrence with minimal mortality.

Area of Science:

  • Neuroscience
  • Neurology
  • Ischemic Stroke Research

Background:

  • Stroke is a leading global cause of death and disability, with ischemic strokes comprising 85% of cases.
  • Current animal models for stroke, such as middle cerebral artery occlusion (MCAO), often yield variable and large lesion volumes, limiting their utility for studying specific stroke mechanisms.
  • There is a critical need for refined animal models that accurately mimic human stroke pathology for effective research into brain injury mechanisms.

Purpose of the Study:

  • To introduce and validate a novel ministroke model in mice specifically targeting the barrel cortex.
  • To establish a reproducible model for investigating the molecular mechanisms underlying minor strokes and stroke recurrence.
  • To enable the assessment of functional outcomes using sensitive behavioral tests.
Keywords:
Barrel cortexIschemic strokeLong-term assessmentsLow mortalityMCAOMinistroke

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Main Methods:

  • Permanent ligation of the distal branch of the right middle cerebral artery (MCA) in mice.
  • Temporary occlusion of bilateral common carotid arteries (CCAs) for 7 minutes, followed by reperfusion.
  • Induction of localized ischemia in the sensorimotor cortex, specifically the barrel cortex.

Main Results:

  • The developed ministroke model consistently produces small infarct volumes with very low mortality rates.
  • The model allows for precise targeting of the barrel cortex, facilitating studies on localized brain injury.
  • The vibrissae-evoked forelimb placing test and adhesive removal test demonstrated high sensitivity in assessing functional deficits.

Conclusions:

  • This ministroke model provides a reproducible and reliable platform for studying minor strokes and stroke recurrence.
  • The model's ability to generate small, consistent lesions and low mortality supports long-term functional outcome assessments.
  • The targeted ischemia in the barrel cortex, combined with sensitive behavioral tests, offers a valuable tool for stroke research.