“Cardiovascular complications are the major cause of mortality in diabetic patients. However, the molecular mechanisms underlying diabetes-associated arrhythmias are unclear.
We hypothesized that high glucose, could adversely affect Nav1.5, the major cardiac sodium channel isoform of the heart, at least partially via oxidative stress.
We further hypothesized that cannabidiol (CBD), one of the main constituents of Cannabis sativa, through its effects on Nav1.5, could protect against high glucose elicited oxidative stress and cytotoxicity.
KEY RESULTS:
High glucose evoked cell death associated with elevation in reactive oxygen species, right shifted the voltage dependence of conductance and steady state fast inactivation and increased persistent current leading to computational prolongation of action potential (hyperexcitability) which could result in long QT3 arrhythmia. CBD mitigated all the deleterious effects provoked by high glucose. Perfusion with Lidocaine (a well-known sodium channels inhibitor with anti-oxidant effects), or co-incubation of Tempol (a well-known anti-oxidant) elicited protection, comparable to CBD, against the deleterious effects of high glucose.
CONCLUSIONS AND IMPLICATIONS:
These findings suggest that, through its favourable anti-oxidant and sodium channel inhibitory effects, CBD may protect against high-glucose induced arrhythmia and cytotoxicity.”
https://www.ncbi.nlm.nih.gov/pubmed/32077098
https://bpspubs.onlinelibrary.wiley.com/doi/abs/10.1111/bph.15020
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