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Home NEWS Science News Health

UTSA reduces seizures by removing newborn neurons

Bioengineer by Bioengineer
July 22, 2019
in Health
Reading Time: 3 mins read
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Findings reveal specific time frame for post-injury intervention

IMAGE

Credit: UTSA

Epileptic seizures happen in one of every 10 people who have experienced a traumatic brain injury (TBI). However, new research at The University of Texas at San Antonio (UTSA) has uncovered an innovative approach to possibly slow the progression of epilepsy. Researchers at UTSA have successfully removed new neurons that have developed after a brain injury to reduce seizures in mice. They believe that the technique could potentially reduce post-injury epilepsy.

“We already know that new neurons contribute to epilepsy, but we didn’t know if we could target them post-injury, after seizures have already started,” said Jenny Hsieh, Semmes Foundation Chair and Professor in Cell Biology and Director of the UTSA Brain Health Consortium.

“Having the ability to do this would be clinically relevant, because the early warning signs of epilepsy are the seizures themselves.”

People who experience traumatic brain injury as a consequence of gun violence or automobile accidents are at higher risk of developing seizures. During a seizure there is a sudden abnormal electrical disturbance in the brain that results in various symptoms: strange movement of the head, body, arms, legs or eyes such as stiffening or shaking. Unresponsiveness and staring, chewing, lip smacking and even experiencing strange visual images are also indicative of a seizure.

According to the U.S. Centers for Disease and Control, TBI-related emergency department visits, hospitalizations and deaths have increased by 53%. Those who suffer a seizure a week after suffering head trauma are 80% more likely to suffer another post-trauma epileptic attack.

Seizures usually happen where there is a scar in the brain as a consequence of the injury. New neurons generated following a brain injury often do not migrate or develop normally. If left untreated, these cells may contribute to the development of epilepsy.

Hsieh and her colleagues at The University of Texas at San Antonio systematically removed new neurons that formed during the eight weeks following a seizure in mice. The UTSA team then monitored seizure activity in the mice and observed that the treated mice experienced a 65 percent reduction in seizures compared to untreated mice. This effect required more than four weeks of continuous treatment.

“Now we know we can remove new neurons after the initial seizures,” said Hsieh. “While we cannot stop the first seizures, we can try to prevent the secondary seizures. This is very exciting and may lead to new therapeutic strategies.”

Although these findings support a role for new neurons in the onset of epilepsy, they also suggest additional factors are involved.

“We found that once the treatment stopped, the seizure reduction was not permanent. This could be due to abnormal changes in the epileptic brain, such as chronic inflammation or reactive astrocytes, affecting the development of new neurons. We’re looking into those possibilities now,” said Hsieh.

###

This new finding is a collaboration between Professor Jenny Hsieh and Parul Varma at UTSA and researchers Rebecca Brulet and Ling Zhang at UT Southwestern Medical Center. The work was published recently in the acclaimed publication The Journal of Neuroscience.

Hsieh is the director of the UTSA Brain Health Consortium, a community of scientists seeking to understand the inner workings of the brain. This discovery on trauma-related epilepsy is an example of UTSA’s commitment to solve today’s most pressing health challenges.

Media Contact
Milady Nazir
[email protected]

Original Source

https://www.utsa.edu/today/2019/07/story/NeuronsSeizures.html

Related Journal Article

http://dx.doi.org/10.1523/JNEUROSCI.0920-19.2019

Tags: BiochemistryBiologyCell BiologyneurobiologyNeurochemistryPhysiologyPublic HealthSports MedicineTrauma/Injury
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