Hyperornithinemia
May. 03, 2023
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04.05.2024
A study by New York and Rocky Mountain U.S. Department of Veterans Affairs researchers showed blast exposure can cause intestinal permeability, a condition that can lead to gut bacteria entering the bloodstream and causing problems in other parts of the body. The study was the first to show a connection between blasts and intestinal permeability in a real-world operational setting.
Researchers found biomarkers of intestinal permeability and signs of bacteria in the blood in 23 of 30 military breachers who were exposed to controlled, low-level explosive blasts during training. The biomarkers were observed between one and 16 hours after blast exposure, suggesting a direct connection.
Intestinal permeability is a condition in which materials in the gastrointestinal tract can pass through the cells lining the intestinal walls. While the human body naturally has some intestinal permeability to allow nutrients to pass through the gut, when the barrier is too loose harmful substances such as bacteria can pass through into the rest of the body.
Participants also reported headache, dizziness, concentration problems, and slow thinking after blast exposure. These symptoms are often seen in people with mild traumatic brain injury. Analysis suggested bacterial leakage could add to mild traumatic brain injury to increase mental symptoms. Previous research has shown a connection between gut bacteria and cognitive performance.
About 20% of post-9/11 active duty Service members and Veterans have reported at least one mild TBI, with more than a third of these being caused by blast-related injuries. Traumatic brain injury research has shown pressure waves caused by explosions can cause internal injuries to the vasculature of the brain. While the entire body is susceptible to this type of damage from blasts, less is known about how the digestive tract may be affected. To the best of the author’s knowledge, this is the first study to show a direct connection between blasts and intestinal permeability with associated cognitive symptoms.
The authors suggest treatment of blast-related TBI should also take into consideration intestinal integrity, the gut microbiota, and bacterial effects such as systemic inflammation.
The study appeared in the March 21, 2024, issue of the International Journal of Molecular Sciences.
Source: News Release
Veterans Affairs Research Communications
Arpil 5, 2024
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