Poor Corticospinal Motor Neuron Health Is Associated with Increased Symptom Severity in the Acute Phase Following Repetitive Mild TBI and Predicts Early ALS Onset in Genetically Predisposed Rodents

Brain Sciences

Jean-Philippe Vit¹  MorR. Alkaslasi²  PatriciaS. Haro-Lopez²  Pablo Avalos²  GretchenM. Thomsen²  NoellE. Cho²  Oksana Shelest²  EricJ. Ley³  AudreyR. Yang³  NikhilT. Linaval³  NavpreetK. Dhillon³  Josh Ghoulian³ 

[1] Biobehavioral Research Core, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA;Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA;Department of Surgery, Division of Trauma and Critical Care, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA;

关键词: amyotrophic lateral sclerosis;    traumatic brain injury;    concussion;    corticospinal motor neurons;    chronic traumatic encephalopathy;   

DOI  :  10.3390/brainsci11020160

来源: DOAJ

【 摘 要 】

Traumatic brain injury (TBI) is a well-established risk factor for several neurodegenerative disorders including Alzheimer’s disease and Parkinson’s disease, however, a link between TBI and amyotrophic lateral sclerosis (ALS) has not been clearly elucidated. Using the SOD1^G93A rat model known to recapitulate the human ALS condition, we found that exposure to mild, repetitive TBI lead ALS rats to experience earlier disease onset and shortened survival relative to their sham counterparts. Importantly, increased severity of early injury symptoms prior to the onset of ALS disease symptoms was linked to poor health of corticospinal motor neurons and predicted worsened outcome later in life. Whereas ALS rats with only mild behavioral injury deficits exhibited no observable changes in corticospinal motor neuron health and did not present with early onset or shortened survival, those with more severe injury-related deficits exhibited alterations in corticospinal motor neuron health and presented with significantly earlier onset and shortened lifespan. While these studies do not imply that TBI causes ALS, we provide experimental evidence that head injury is a risk factor for earlier disease onset in a genetically predisposed ALS population and is associated with poor health of corticospinal motor neurons.

【 授权许可】

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