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Abstract
NOABSTRACT
Cannabidiol (CBD) is one of the most prominent non-psychotropic cannabinoids with known therapeutic potentials. Based on its anti-seizure efficacy, the first cannabis derived pharmaceutical grade CBD-based medication was approved in the USA in 2018 for the treatment of seizures in patients 2 years and older. Despite the effectiveness in reducing seizures, there remain several major questions on the optimization of CBD therapy for epilepsy such as the optimal dosage, composition, and route of delivery, which are the main objective of this current study.
We evaluated the antiseizure effects of CBD through different compositions, routes of delivery, and dosages in a pre-clinical model. We used a kainic acid-induced epilepsy model in C57BL/6 mice, treated them with placebo and/or CBD through inhalation, oral, and injection (intraperitoneal) routes. We used CBD broad spectrum (inhaled and intraperitoneal) vs CBD isolate formulations. We employed the Racine scaling system to evaluate the severity of the seizures, flow cytometry for measuring immune biomarkers and neurotrophic factors, and histologic analysis to examine and compare the groups.
Our findings showed that all forms of CBD reduced seizures severity. Among the combination of CBD tested, CBD broad spectrum via inhalation was the most effective in the treatment of epileptic seizures (p < 0.05) compared to other forms of CBD treatments.
Our data suggest that route and CBD formulations affect its efficacy in the prevention of epileptic seizures. Inhaled broad spectrum CBD showed a potential superior effect compared to other delivery routes and CBD formulations in the prevention of epileptic seizures, which warrants further research.
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1 Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States of America; Center for Excellence in Research, Scholarship and Innovation (CERSI), Dental College of Georgia, Augusta, Augusta University, Augusta, GA, United States of America; The Graduate School, Augusta University, Augusta, GA, United States of America
2 Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States of America; Center for Excellence in Research, Scholarship and Innovation (CERSI), Dental College of Georgia, Augusta, Augusta University, Augusta, GA, United States of America
3 Medical College of Georgia, Augusta University, Augusta, GA, United States of America
4 College of Education, Augusta University, Augusta, GA, United States of America
5 Department of Neurology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
6 Georgia Cancer Center and Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
7 Piedmont Ear, Nose, Throat and Related Allergy, Atlanta, GA, United States of America
8 School of Public Health, Augusta University, Augusta, GA, United States of America
9 Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
10 Department of Surgery, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
11 Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States of America; Center for Excellence in Research, Scholarship and Innovation (CERSI), Dental College of Georgia, Augusta, Augusta University, Augusta, GA, United States of America; School of Public Health, Augusta University, Augusta, GA, United States of America
12 Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States of America; Center for Excellence in Research, Scholarship and Innovation (CERSI), Dental College of Georgia, Augusta, Augusta University, Augusta, GA, United States of America; Department of Neurology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America; Department of Surgery, Medical College of Georgia, Augusta University, Augusta, GA, United States of America