A new international study has unveiled critical insights in understanding post-traumatic epilepsy (PTE), a condition that can develop following traumatic brain injury. Led by researchers at FutureNeuro, the Research Ireland Centre for Translational Brain Science and RCSI University of Medicine and Health Sciences and published in Theranostics, the study highlights the important role played by a receptor in the brain called P2X7. It suggests how we could both reduce epilepsy risk and predict which patients are most at risk of developing PTE by targeting this receptor.

Traumatic brain injury (TBI), caused by physical trauma to the head, is one of the leading causes of long-term disability and death worldwide. PTE is a common outcome, characterised by recurring seizures that profoundly impact quality of life. At the moment, up to 30% of PTE patients do not respond to existing medications, and no treatments are currently available to predict or prevent the development of epilepsy following traumatic brain injury.

The collaborative research, led by FutureNeuro and RCSI, involving institutions including Trinity College Dublin, CIC biomaGUNE, Soochow University, and the Institute for Stroke and Dementia Research, identifies the P2X7 receptor as a key driver of abnormal brain activity after brain injury. In preclinical models, blocking this receptor shortly after injury significantly reduced brain hyperexcitability, minimised brain damage, and improved behaviour, underscoring its promise as a therapeutic target for preventing epilepsy. 

By looking at the activity of the P2X7 receptor using a PET scan, the authors also suggest a potential new diagnostic tool. The uptake by the brain of a specialised P2X7 receptor tracer shortly after injury was found to correlate with seizure risk weeks later. This tool could help clinicians identify at-risk patients early, enabling timely and tailored interventions.  AlphaGalileo/SP