Researchers Develop Cost-Effective Device to Study Brain Injury

Four researchers at the University of Rhode Island have created an innovative tabletop device designed to simulate blast pressure waves, which can help investigate the effects of traumatic brain injury (TBI) on neurodegenerative diseases. Their findings were published in the journal Cell Reports Methods, marking a significant advancement in TBI research.

The team, led by Claudia Fallini and Riccardo Sirtori, aims to enhance understanding of how TBI contributes to the development of conditions such as amyotrophic lateral sclerosis, frontotemporal dementia, and Alzheimer’s disease. By employing stem cell cultures, Fallini’s research focuses on the cellular mechanisms that lead to these debilitating diseases. The new device will allow for more accessible in vitro studies of TBI, providing a foundation for future therapeutic interventions.

TBI is a leading cause of mortality and disability, impacting over 65 million people globally each year. Epidemiological studies have identified blast-induced TBI as a major environmental risk factor for neurodegeneration. A single moderate-to-severe TBI can increase the risk of developing dementia by four times. While animal models have traditionally been used to study TBI, emerging research indicates that induced pluripotent stem cell (iPSC)-derived brain organoids may offer a more relevant human-specific alternative.

Fallini had been exploring ways to model TBI without relying on animal studies but found existing methods to be overly complex or prohibitively expensive. Collaborating with engineers Arun Shukla and Akash Pandey from URI’s College of Engineering, the team aimed to develop a practical solution. Shukla, an expert in blast mitigation, and Pandey, a Ph.D. candidate, worked together to create a tabletop blast simulator.

The project, initiated in the summer of 2024, involved designing and calibrating a shock-loading device within a month. To ensure it would be suitable for biological experiments, Pandey constructed a miniaturized water-filled shock tube apparatus. The resulting device utilizes affordable materials such as PVC pipe and aluminum, allowing for the generation of high-pressure pulses that replicate the effects of blast injuries.

During testing, organoids were exposed to blast waves lasting less than 1 millisecond, a duration significantly shorter than the blink of an eye. This brief exposure was sufficient to cause extensive damage to various cellular structures, potentially leading to neurodegeneration. The injury modeled in their experiments resembles that from improvised explosive devices (IEDs) or gunfire.

Fallini noted the value of the collaboration between cell biology and engineering, stating, “It was interesting to see the type of research they are doing on blast impact in Dr. Shukla’s lab, a very different angle on the same important issue.” The team’s device offers researchers a standardized, reproducible, and customizable tool for TBI studies, enabling deeper insights into the consequences of blast injuries.

Preliminary results indicate that deep-layer cortical neurons are more vulnerable to blast exposure than upper-layer neurons. With this knowledge, Fallini and Sirtori are now better equipped to assess DNA damage following TBI. “This is a valuable, accessible tool to advance research in this area,” Fallini emphasized.

As the field of TBI research continues to evolve, the tabletop blast device represents a significant leap forward, promising to enhance our understanding of the long-term effects of brain injuries and their links to neurodegenerative diseases.

For further details, refer to the research article by Riccardo Sirtori et al., titled “A tabletop blast device for the study of the long-term consequences of traumatic brain injury on brain organoids,” published in Cell Reports Methods.