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Updated: Jun 25, 2026
Systems Analysis of the Neuroinflammatory and Hemodynamic Response to Traumatic Brain Injury
Published on: May 27, 2022
Mitoquinone Helps Combat the Neurological, Cognitive, and Molecular Consequences of Open Head Traumatic Brain Injury
Muhammad Ali Haidar1, Zaynab Shakkour2, Chloe Barsa1
1Faculty of Biochemistry and Molecular Genetics, American University of Beirut, Beirut 1107 2020, Lebanon.
Abstract:
Traumatic brain injury (TBI) is a heterogeneous disease in its origin, neuropathology, and prognosis, with no FDA-approved treatments. The pathology of TBI is complicated and not sufficiently understood, which is the reason why more than 30 clinical trials in the past three decades turned out unsuccessful in phase III. The multifaceted pathophysiology of TBI involves a cascade of metabolic and molecular events including inflammation, oxidative stress, excitotoxicity, and mitochondrial dysfunction. In this study, an open head TBI mouse model, induced by controlled cortical impact (CCI), was used to investigate the chronic protective effects of mitoquinone (MitoQ) administration 30 days post-injury. Neurological functions were assessed with the Garcia neuroscore, pole climbing, grip strength, and adhesive removal tests, whereas cognitive and behavioral functions were assessed using the object recognition, Morris water maze, and forced swim tests. As for molecular effects, immunofluorescence staining was conducted to investigate microgliosis, astrocytosis, neuronal cell count, and axonal integrity. The results show that MitoQ enhanced neurological and cognitive functions 30 days post-injury. MitoQ also decreased the activation of astrocytes and microglia, which was accompanied by improved axonal integrity and neuronal cell count in the cortex. Therefore, we conclude that MitoQ has neuroprotective effects in a moderate open head CCI mouse model by decreasing oxidative stress, neuroinflammation, and axonal injury.
Insights
Mitoquinone (MitoQ) demonstrated neuroprotective effects in a traumatic brain injury (TBI) mouse model. This study shows MitoQ improved neurological and cognitive functions while reducing neuroinflammation and axonal injury.
Area of Science:
- Neuroscience
- Pharmacology
- Biomedical Engineering
Background:
- Traumatic brain injury (TBI) lacks FDA-approved treatments due to complex pathophysiology.
- Over 30 Phase III clinical trials have failed to yield effective TBI therapies.
- TBI involves inflammation, oxidative stress, excitotoxicity, and mitochondrial dysfunction.
Purpose of the Study:
- To investigate the chronic neuroprotective effects of mitoquinone (MitoQ) in a mouse model of traumatic brain injury.
- To assess MitoQ's impact on neurological, cognitive, and behavioral functions 30 days post-injury.
- To evaluate MitoQ's molecular effects on neuroinflammation and neuronal integrity.
Main Methods:
- An open head traumatic brain injury (TBI) mouse model was induced using controlled cortical impact (CCI).
- Mitoquinone (MitoQ) was administered for chronic protective effects.
- Neurological, cognitive, and behavioral functions were assessed using various behavioral tests.
- Immunofluorescence staining evaluated microgliosis, astrocytosis, neuronal cell count, and axonal integrity.
Main Results:
- MitoQ administration significantly enhanced neurological and cognitive functions 30 days post-TBI.
- MitoQ treatment reduced microgliosis and astrocytosis, indicating decreased neuroinflammation.
- Improved axonal integrity and increased neuronal cell count were observed in the cortex of MitoQ-treated mice.
- MitoQ mitigated key pathological hallmarks of TBI, including oxidative stress and axonal injury.
Conclusions:
- Mitoquinone (MitoQ) exhibits significant neuroprotective effects in a moderate open head traumatic brain injury (TBI) mouse model.
- MitoQ's therapeutic benefits are attributed to its ability to decrease oxidative stress and neuroinflammation.
- The study supports MitoQ as a potential therapeutic agent for mitigating TBI-induced damage and improving long-term outcomes.
