Study Finds Inhaled CBD Reversed Seizure and Inflammation-Related Effects of Chronic Nicotine Exposure
- The study found that chronic nicotine pouch exposure in mice worsened seizures, increased brain inflammation, and impaired glymphatic waste-clearance function.
- Acute nicotine exposure briefly reduced seizure severity, but seven days of chronic exposure significantly increased seizure vulnerability and disrupted neuroinflammatory markers and Aquaporin-4 expression.
- Inhaled CBD reduced seizure severity, restored Aquaporin-4 levels, normalized inflammatory markers (IL-6, HMGB1), and suppressed neuronal activation protein c-FOS in nicotine-exposed mice.
- Researchers suggest inhaled CBD could be a potential treatment for nicotine-induced neurological effects, but further studies are needed to confirm these results in humans.
A new study published in Experimental Lung Research found that inhaled CBD reversed several seizure-related and inflammatory effects linked to chronic nicotine pouch exposure in mice.
Researchers from Augusta University examined how acute and chronic oral nicotine exposure affected seizure vulnerability, neuroinflammation and glymphatic function, while also testing whether inhaled CBD could counteract those effects. The study found that while acute nicotine briefly reduced seizure severity, seven days of chronic nicotine pouch exposure significantly worsened seizures and disrupted markers tied to brain inflammation and waste-clearance function.
The study used mice exposed to either acute nicotine or seven days of chronic nicotine pouch exposure before kainic acid-induced seizures. Seizure severity was measured using the Racine scale, while researchers also examined neuroinflammatory markers, neuronal activation markers and Aquaporin-4, a protein associated with glymphatic function.
According to the study, chronic nicotine exposure was associated with increased levels of IL-6, HMGB1, BDNF and c-FOS. Researchers also found that chronic exposure significantly reduced Aquaporin-4 expression, while tracer studies confirmed impaired glymphatic influx.
Researchers then tested whether inhaled CBD could reverse these effects. The study found that CBD reduced seizure severity, restored Aquaporin-4 expression, normalized IL-6 and HMGB1 levels and reduced c-FOS protein expression.
An ex vivo assay further showed that nicotine induced IL-6 production in brain-derived immune cells, while CBD suppressed that response upstream of IL-6 signaling.
Researchers concluded that chronic nicotine pouch exposure may promote seizure susceptibility through overlapping neuroimmune and glymphatic disruptions, while inhaled CBD appeared to counteract those effects. They said the findings support further investigation into CBD as a potential therapeutic strategy for nicotine-associated neurological risk.
The study was conducted in mice, meaning further research is needed to determine whether the findings translate to humans.