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Photothrombosis-induced Focal Ischemia as a Model of Spinal Cord Injury in Mice
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Cervical Sympathetic Block as a Modulator of Secondary Injury Mechanisms in Traumatic Brain Injury
Eugene Lipov1, Jordan Patierno2
1Stella Center, Westmont, IL 60559, United States.
Military Medicine
|June 2, 2026
Summary
Cervical sympathetic blockade (CSB) offers a promising new treatment for traumatic brain injury (TBI) by targeting secondary injury mechanisms like neuroinflammation and oxidative stress, leading to improved patient outcomes.
Area of Science:
- Neuroscience
- Trauma Surgery
- Pharmacology
Background:
- Traumatic brain injury (TBI) involves a secondary injury cascade including neuroinflammation, blood-brain barrier (BBB) disruption, and apoptosis.
- Current TBI management focuses on intracranial pressure and perfusion, not directly on these downstream biological mechanisms.
- Cervical sympathetic blockade (CSB) interrupts sympathetic outflow and may modulate immune responses, showing potential to attenuate TBI secondary injury.
Purpose of the Study:
- To review the therapeutic potential of CSB in TBI.
- To delineate the mechanistic effects of CSB on secondary injury pathways.
- To synthesize preclinical and clinical evidence on CSB for TBI.
Main Methods:
- Comprehensive narrative review of preclinical and clinical studies on CSB in TBI and related conditions.
- Literature search using PubMed and Google Scholar, supplemented by citation tracking.
- Inclusion of randomized controlled trials, cohort studies, case series, and animal models, analyzing outcomes like symptom burden, cytokines, BBB integrity, oxidative stress, gene expression, and apoptosis.
Main Results:
- CSB demonstrated rapid and sustained reductions in TBI symptom burden in clinical studies.
- CSB significantly reduced pro-inflammatory cytokines (IL-6, TNF-α, IL-1β) and neuronal injury markers, likely via NF-κB downregulation.
- Preclinical models showed CSB mitigated mitochondrial oxidative stress, enhanced antioxidant defenses, and promoted neuronal survival by shifting the Bax/Bcl-2 ratio.
Conclusions:
- CSB targets multiple secondary TBI mechanisms (neuroinflammation, oxidative stress, apoptosis) not addressed by current treatments.
- Clinical improvements correlate with measurable biological changes, supporting CSB's mechanistic therapeutic effect.
- Larger trials are needed to confirm efficacy, optimize patient selection, and assess long-term outcomes for civilian and military TBI populations.
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