A Literature Review of Traumatic Brain Injury Biomarkers

Area of Science:

• Neuroscience
• Biomarker Discovery
• Traumatic Brain Injury (TBI) Research

Background:

• Traumatic Brain Injury (TBI) research faces challenges due to heterogeneous pathologies, complicating evaluation, management, and prognosis.
• Traditional biomarkers (e.g., proteins from injured cells) may not be reliably detected in peripheral blood or cerebrospinal fluid (CSF) due to the blood-brain barrier and injury-induced flow limitations.
• There is a critical need for novel TBI biomarkers that accurately reflect molecular pathologies, including mild TBI, and aid in predicting patient outcomes and testing neuroprotective agents.

Purpose of the Study:

• To review traditional biomarkers used in clinical practice for Traumatic Brain Injury (TBI) evaluation.
• To highlight the emerging potential of extracellular vesicles, specifically exosomes and miRNAs, as novel TBI biomarkers.
• To discuss how these novel biomarkers can overcome the limitations of current diagnostic methods.

Main Methods:

• Comprehensive literature review of traditional Traumatic Brain Injury (TBI) biomarkers.
• Analysis of recent studies investigating extracellular vesicles (exosomes, miRNAs) as potential TBI biomarkers.
• Examination of animal and human experimental data demonstrating the accuracy of exosomes and miRNAs in TBI detection.

Main Results:

• Traditional TBI biomarkers, while useful, have limitations in detection sensitivity and specificity.
• Extracellular vesicles, including exosomes and miRNAs, show significant promise as accurate biomarkers across mild, moderate, and severe TBI.
• These novel biomarkers demonstrate potential to overcome the detection challenges associated with blood and CSF assays.

Conclusions:

• Extracellular vesicles represent a significant advancement in the search for reliable Traumatic Brain Injury (TBI) biomarkers.
• Exosomes and miRNAs are emerging as key candidates for improving TBI diagnosis, prognosis, and the development of targeted therapies.
• Further research into extracellular vesicles is crucial to fully realize their clinical potential in managing TBI.