Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging

Pin-Hui Kuo; Tzu-Hsuan Tang; Shu-Hui Huang; Bao-Yu Hsieh; Chia-Feng Lu; Yu-Chieh Jill Kao

doi:10.3791/67011

Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method ...

JoVE Journal
Neuroscience

A subscription to JoVE is required to view this content. Sign in or start your free trial.

JoVE Journal Neuroscience

Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging

Full Text

1,016 Views

08:27 min

April 11, 2025

DOI: 10.3791/67011-v

Pin-Hui Kuo¹, Tzu-Hsuan Tang¹, Shu-Hui Huang¹, Bao-Yu Hsieh^2,3, Chia-Feng Lu¹, Yu-Chieh Jill Kao¹

¹Department of Biomedical Imaging and Radiological Sciences,National Yang Ming Chiao Tung University, ²Department of Medical Imaging and Radiological Sciences, College of Medicine,Chang Gung University, ³Department of Medical Imaging and Intervention,Chang Gung Memorial Hospital at Linkou

Overview

This study presents a protocol for creating a closed-head injury animal model that accurately replicates the neuroimaging outcomes of uncomplicated mild traumatic brain injury (mTBI). The model maintains brain structure in the acute phase, while demonstrating long-term brain atrophy, and utilizes longitudinal magnetic resonance imaging (MRI) as the primary assessment tool.

Key Study Components

Area of Science

Neuroscience
Traumatic Brain Injury
Animal Models

Background

Understanding the progression of uncomplicated mild traumatic brain injury (mTBI) is crucial, especially in pediatric and adolescent populations.
The study aims to connect cross-sectional human studies with animal pathology to provide insights into mTBI progression.
The research focuses on assessing different impact parameters to analyze their effects on outcome measures.

Purpose of Study

To establish a robust animal model that accurately mimics the neuroimaging findings associated with mTBI.
To investigate the influence of various impact parameters on behavioral, imaging, and pathological outcomes post-injury.
To facilitate longitudinal neuroimaging assessments in understanding mTBI's long-term effects.

Methods Used

The protocol employs a closed-head injury model using rats.
This involves precise stereotaxic surgery to deliver controlled impacts, followed by MRI for imaging analysis.
Key steps include anesthesia, skull preparation, impact delivery, and subsequent imaging at defined time points.
Behavioral assessments are performed post-injury to evaluate recovery and deficits.

Main Results

Longitudinal MRI revealed no immediate structural brain damage, but significant cortical volume reduction was observed at later time points.
Repetitive closed-head injury led to greater cortical loss compared to a single event.
Astrocyte accumulation was noted despite the severity of the injury and impact site.

Conclusions

The study successfully establishes a model for investigating the effects of mild traumatic brain injuries, enhancing our understanding of mTBI progression.
This model allows for future studies exploring the complexities of injury parameters and their implications for treatment and rehabilitation.
Overall, the findings underscore the critical importance of injury dynamics in shaping neurological outcomes.

Frequently Asked Questions

What are the advantages of this animal model?

This model effectively replicates mTBI neuroimaging outcomes and allows for the exploration of recovery dynamics over time.

How is the closed-head injury implemented in the rat model?

The closed-head injury involves precise surgical techniques and controlled impact administration using a weight drop system to induce brain injury while minimizing acute damage.

What types of data are obtained from this study?

The study provides neuroimaging data via MRI, behavioral changes assessments, and pathological analysis including astrocyte accumulation and cortical volume measurements.

How can this method be adapted for other types of injury research?

The surgical and imaging protocols can be modified to evaluate various forms of brain injuries, making this model versatile for different neurological conditions.

What are the key limitations of this closed-head injury model?

Limitations may include variations in individual animal responses to injury and the necessity for careful control over impact parameters to ensure reproducibility.

Here, we present a protocol to establish a closed-head injury animal model replicating the neuroimage outcome of uncomplicated mild traumatic brain injury with the preserved brain structure in the acute phase and long-term brain atrophy. Longitudinal magnetic resonance imaging is the primary method used for evidence.

Our research focuses on developing a closed-head injury animal model that mimics neuroimaging outcomes of uncomplicated mild traumatic brain injury. We end to determine whether different impact parameters in RmTBI lead to distinct imaging, behavioral, and pathological changes. We developed an animal model that replicates the radiological changes of uncomplicated mTBI, demonstrating significant behavioral deficits and long-term brain atrophy.

This work connects cross-sectional human studies with animal pathology research, providing translation and longitudinal neuroimaging assessment to better understand the mTBI progression. Our results open new avenues for investigating disease progression and outcome changes after uncomplicated mTBI. They also highlight the crucial role of injury parameters in shaping post-injury outcomes.

View the full transcript and gain access to thousands of scientific videos