Mild traumatic brain injury (mTBI), otherwise known as concussion, is a common battlefield injury that, in the military, typically results from exposure to improvised explosive devices (IEDs), falls, vehicular crashes, other combat-related activities, training, or sports. Over 379,000 United States military service members (SMs) sustained a TBI of any severity between 2000 and 2017 (15% due to combat-related activities in Iraq and Afghanistan; 82.3% classified as mTBI). Past studies suggest a link between single and repetitive mTBI/concussion and associated clinical symptoms, including sleep disturbance, headaches, and memory problems. A greater number of total lifetime concussions has been linked to increased insomnia, depression, emotional distress, and concussion symptom severity. Similarly, history of mTBI/concussion has been associated with subsequent development of neurological and psychiatric illness, such as mood disorders, mild cognitive impairment, chronic traumatic encephalopathy, dementia (in particular, Alzheimer?s-type). Because of the severity of symptoms and significant impact on quality of life, early identification of these diseases is imperative. Several biomarkers associated with these diseases have been found in cerebrospinal fluid (CSF); however, CSF is difficult to obtain due to the invasive nature of its collection. Therefore, we wish to collect preliminary data on blood biomarkers in military personnel who have sustained a concussion or blast exposure during combat deployment, in order to compare concentrations post-injury to pre-injury. We hypothesize that changes in neuronal biomarkers will be linked to chronic, persistent clinical symptoms following concussion.

Public Health Relevance

Mild traumatic brain injury (mTBI), otherwise known as concussion, is a common civilian and military injury. Given the heightened awareness of possible long-term consequences of concussion, such as chronic traumatic encephalopathy, a better understanding of persistent clinical sequelae after concussion would better inform clinical care. We will analyze human blood biomarkers following mTBI and study their association with chronic persistent clinical symptoms after concussion.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Exploratory/Developmental Grants (R21)
Project #
5R21NS110410-02
Application #
9919635
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Bellgowan, Patrick S F
Project Start
2019-05-01
Project End
2021-04-30
Budget Start
2020-05-01
Budget End
2021-04-30
Support Year
2
Fiscal Year
2020
Total Cost
Indirect Cost
Name
University of Tennessee Health Science Center
Department
Neurology
Type
Schools of Medicine
DUNS #
941884009
City
Memphis
State
TN
Country
United States
Zip Code
38103