The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies

J Vis Exp. 2025 Feb 7:(216). doi: 10.3791/66847.

Abstract

The filament model of middle artery occlusion (fMCAo) is perhaps the most translational mouse stroke model, allowing for controlled ischemia with intravascular reperfusion/recanalization. However, it lacks alignment with current clinical advances for stroke care (e.g., Stroke Units), usually employs subjective or vague neurological scoring among laboratories, and exhibits high acute-phase mortality. Here, we address these limitations with validated video-guided protocols. We present the mouse Stroke Unit (mSU) protocol with instructional videos and a decision algorithm (Risk Stratification Score), bridging the gap between clinical and mouse stroke modeling. To increase accuracy and sensitivity of stroke neurological scoring, we present for the first time a video-standardized format of the focal Experimental Stroke Scale (fESS) and prove its value up to 6 months post-stroke. Additionally, protocols for mice Ladder-rung test, as well as the known Cylinder test, for unbiased, quantitative assessment of limbs´ motor function are presented. Results highlight mSU's translational efficacy. Focal ESS (fESS) excels over other known scales in detecting focal stroke deficits, capturing recovery, and maintaining sensitivity for up to 6 months post-stroke. Ladder-rung and Cylinder tests objectively quantify and monitor fore- and hind-limb motor deficits, long-term. In summary, integrating mSU, fESS, and motor function tests provides a robust framework for clinically relevant stroke investigations. Our protocols improve the translational value in mouse stroke research.

Publication types

  • Video-Audio Media

MeSH terms

  • Animals
  • Disease Models, Animal*
  • Mice
  • Mice, Inbred C57BL
  • Stroke* / diagnosis
  • Stroke* / pathology
  • Stroke* / physiopathology
  • Translational Research, Biomedical / methods