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Researchers identify genetic variation that may influence severity of CTE disease

Researchers identify genetic variation that may influence severity of CTE disease

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Researchers have identified a genetic variation that may influence chronic traumatic encephalopathy (CTE) disease severity.

TMEM106B is one of the first genes to be implicated in CTE. It may partially explain why some athletes present with severe CTE symptoms while others are less affected despite similar levels of head trauma.

The study provides preliminary evidence that this genetic variation might help predict which individuals are at greater risk to develop severe CTE pathology and dementia, according to the researchers. It also provides insight into the disease mechanism underlying CTE, which could aid in the development of biomarkers for diagnosis during life and in the identification of targets for treatments.

Researchers from Boston University School of Medicine (BUSM) and the VA Boston Healthcare System (VABHS) studied 86 former contact-sport athletes whose brains were donated to the VA-BU-CLF brain bank and found to have evidence of CTE, but no other pathology. The athlete brains were examined for genetic variation in TMEM106B, a gene thought to be involved in the brain’s inflammation system. Overall, the genetic variation was not different in those with CTE compared to those without. “However, among the athletes with CTE, variation did predict increased CTE pathology and brain inflammation. Additionally, the risk allele increased the likelihood of developing dementia by 2.5 times suggesting the variant might predict an increased risk for developing the symptoms of CTE,” explained first author Jonathan Cherry, PhD, postdoctoral fellow in neurology at BUSM.

“These findings may help explain why some individuals experience more severe CTE related outcomes while others are spared despite similar exposure to contact sports. By better understanding why some individuals are more at risk for CTE, we can identify novel therapeutic targets to help treat all with the disease,” said corresponding author Thor Stein, MD, PhD, neuropathologist at VA Boston Healthcare System and assistant professor of pathology and laboratory medicine at BUSM.

The researchers caution that it is still unclear what variation in TMEM106B means on an individual level for people at risk for CTE. Therefore, genetic testing for clinical care is not currently recommended.

Posted in: Medical Science News | Medical Research News | Healthcare News | Medical Patent News

Tags: Allele, Brain, Concussion, Dementia, Encephalopathy, Gene, Genes, Genetic, Head Trauma, Healthcare, Inflammation, Laboratory, Medicine, Neurology, Pathology, Research, Stroke, Trauma, Traumatic Brain Injury, Veterans Affairs

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