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Published on: November 14, 2025
Temporary focal ischemia in the mouse: technical aspects and patterns of Fluoro-Jade evident neurodegeneration
Edward A M Duckworth1, Tanya L Butler, Dirson De Mesquita
1Department of Neurosurgery, University of South Florida College of Medicine, Tampa, FL 33612, USA.
Abstract:
Animal models of cerebral infarction are crucial to understanding the mechanisms of neuronal survival following ischemic brain injury and to the development of therapeutic interventions for victims of all types of stroke. Rodents have been used extensively in such research. One rodent model of stroke utilizes either permanent or temporary occlusion of the middle cerebral artery (MCAO) to produce ischemia. Since the development of an endovascular method for this was published in 1989, MCAO has been applied commonly to the rat, and often paired with 2, 3, 5-triphenyltetrazolium chloride (TTC) staining for stroke volume measurement. Meanwhile, advances in the ability to genetically alter mice have allowed exciting lines of research into ischemia. Because of technical demands and issues with survival, relatively few laboratories have investigated the MCAO method in the mouse. Our present work utilizes a mouse middle cerebral occlusion (MCAO) model of embolic stroke to study neuronal degeneration following temporary focal cerebral ischemia. C57Bl/6J mice were used to examine the exact effects of MCAO using Fluoro-Jade, a marker of neurodegeneration that allows observation of specific brain regions and cells destined to die. A time course of escalating neuronal degeneration from 10 min to 7 days following MCAO was established. Technical aspects of this popular method for transient focal ischemia as it applies to the mouse are discussed.
Insights
This study establishes a mouse model of embolic stroke using middle cerebral artery occlusion (MCAO) to investigate neuronal degeneration. Researchers detailed the time course of neurodegeneration, providing a valuable tool for stroke research.
Area of Science:
- Neuroscience
- Pathology
Background:
- Animal models are essential for studying ischemic brain injury and developing stroke therapies.
- Middle cerebral artery occlusion (MCAO) is a common rodent model for inducing cerebral ischemia.
- While widely used in rats, MCAO in mice presents technical challenges, limiting its application.
Purpose of the Study:
- To establish and characterize a mouse model of embolic stroke using middle cerebral artery occlusion (MCAO).
- To investigate the time course and extent of neuronal degeneration following transient focal cerebral ischemia in mice.
- To provide technical insights into applying the MCAO method in mice for stroke research.
Main Methods:
- Utilized a mouse model of embolic stroke induced by middle cerebral artery occlusion (MCAO).
- Employed C57Bl/6J mice for the experiments.
- Used Fluoro-Jade staining to visualize and quantify neurodegeneration in specific brain regions over time.
Main Results:
- Established a detailed time course of neuronal degeneration from 10 minutes to 7 days post-MCAO.
- Demonstrated the utility of Fluoro-Jade for observing regional and cellular neurodegeneration.
- Provided a reproducible method for inducing and analyzing focal cerebral ischemia in mice.
Conclusions:
- The developed mouse MCAO model is effective for studying neuronal degeneration in focal cerebral ischemia.
- This model offers a valuable platform for investigating stroke mechanisms and therapeutic interventions.
- The study discusses technical considerations for implementing transient focal ischemia models in mice.
