Induction of Diffuse Axonal Brain Injury in Rats Based on Rotational Acceleration

作者： Dmitry Frank*1, Israel Melamed*2, Benjamin F. Gruenbaum3, Julia Grinshpun1, Ruslan Kuts1, Rachel Shvartsur4, Abed N. Azab4, Mohamad H. Assadi5, Max Vinokur1, Matthew Boyko1 1Division of Anesthesia and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences,Ben-Gurion University of the Negev, 2Department of Neurosurgery, Soroka University Medical Center and the Faculty of Health Sciences,Ben-Gurion University of the Negev, 3Department of Anesthesiology,Yale University School of Medicine, 4Recanati School for Community Health Professions, Faculty of Health Sciences,Ben-Gurion University of the Negev, 5Department of microbiology and immunology, Faculty of Health Sciences,Ben-Gurion University of the Negev

简介：

Overview

This study presents a reliable and reproducible rodent model of brain diffuse axonal injury (DAI), which induces widespread white matter damage through a rotational acceleration mechanism. The model is aimed at better understanding the pathophysiology of DAI following traumatic brain injury (TBI) and may facilitate the development of effective treatments.

Key Study Components

Area of Science

• Neuroscience
• Traumatic Brain Injury
• Axonal Injury Models

Background

• Traumatic brain injury is a leading cause of death and disability.
• Diffuse axonal brain injury leads to extensive axonal damage post-TBI.
• There is a need for robust animal models to study DAI.

Purpose of Study

• To validate a novel rodent model for studying DAI.
• To induce brain injury without skull fractures or contusions.
• To understand the onset of neurological deficits.

Methods Used

• The main platform involves a rotational head injury device.
• Adult male Sprague-Dawley rats served as the biological model, focusing on DAI induction.
• Neurological deficits were assessed using the Neurological Severity Score at 48 hours post-injury.
• Immunochemical staining for beta-amyloid precursor protein was performed on brain sections.

Main Results

• Significantly increased neurological deficits were observed in DAI rats compared to controls.
• Immunochemical assays revealed axonal damage indicated by beta-amyloid precursor protein staining.
• The model demonstrates clear and measurable impacts on neurological function within 48 hours.

Conclusions

• This study establishes a simple and effective model to investigate diffuse axonal injury mechanisms.
• Insights gained may lead to improved understanding and treatments for TBI.
• Findings may inform future research on neuronal injury and recovery processes.

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