Traumatic Brain Injury (TBI)

Protective effects of cannabidiol against hippocampal cell death and cognitive impairment induced by bilateral common carotid artery occlusion in mice.

The present study investigated whether cannabidiol (CBD), a major non-psychoactive constituent of marijuana, protects against hippocampal neurodegeneration and cognitive deficits induced by brain ischemia in adult mice...These findings suggest a protective effect of CBD on neuronal death induced by ischemia and indicate that CBD might exert beneficial therapeutic effects in brain ischemia. The mechanisms that underlie the neuroprotective effects of CBD in BCCAO mice might involve the inhibition of reactive astrogliosis.

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Repeated treatment with cannabidiol but not Delta9-tetrahydrocannabinol has a neuroprotective effect without the development of tolerance.

Both Delta(9)-tetrahydrocannabinol (Delta(9)-THC) and cannabidiol are known to have a neuroprotective effect against cerebral ischemia. We examined whether repeated treatment with both drugs led to tolerance of their neuroprotective effects in mice subjected to 4h-middle cerebral artery (MCA) occlusion...Thus, cannabidiol is a potent antioxidant agent without developing tolerance to its neuroprotective effect, acting through a CB(1) receptor-independent mechanism. It is to be hoped that cannabidiol will have a palliative action and open new therapeutic possibilities for treating cerebrovascular disorders.

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Cannabidiol reduces brain damage and improves functional recovery in a neonatal rat model of arterial ischemic stroke.

Currently there is no effective treatment for neonatal arterial ischemic stroke (AIS). Cannabidiol (CBD) is neuroprotective in models of newborn hypoxic-ischemic brain damage and adult stroke. The purpose of this work was to study the protective effect of CBD in a neonatal rat model of AIS...CBD administration after MCAO led to long-term functional recovery, reducing neuronal loss and astrogliosis, and modulating apoptosis, metabolic derangement, excitotoxicity and neuro-inflammation.

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