Animal Models and Experimental Medicine (Feb 2024)

Simple procedure for assessing diffuse subarachnoid hemorrhage successfully created using filament perforation method in mice

  • Tatsushi Mutoh,
  • Ryota Tochinai,
  • Hiroaki Aono,
  • Masayoshi Kuwahara,
  • Yasuyuki Taki,
  • Tatsuya Ishikawa

DOI
https://doi.org/10.1002/ame2.12372
Journal volume & issue
Vol. 7, no. 1
pp. 77 – 81

Abstract

Read online

Abstract The murine model of subarachnoid hemorrhage (SAH) is a valuable experimental tool for investigating molecular and cellular mechanisms, and the endovascular filament perforation technique can be used to simulate prominent pathophysiological features observed after human SAH; however, current validation methods for assessing an appropriate SAH model are limited. Here, we introduce a simple procedure for selecting a mouse model of diffuse SAH. SAH was induced in 24 mice using a standard filament perforation method. After confirming survival at 24 h, SAH was scored 0–1 based on T2*‐weighted images on whole‐brain magnetic resonance imaging (MRI) and visual surveillance of the cisterna magna (CM) through the dura mater. The CM‐based SAH grading correlated well with a reference parameter defined by extracted brain (r2 = 0.53, p < 0.0001). The receiver operating characteristic curve revealed a sensitivity of 85% and a specificity of 91% for detecting diffuse SAH, with a similar area under the curve (0.89 ± 0.06 [standard error of the mean]) as the MRI‐based grading (0.72 ± 0.10, p = 0.12). Our data suggest that confirming an SAH clot in the CM is a valuable way to select a clinically relevant diffuse SAH model that can be used in future experimental studies.

Keywords