Study: CBD May Protect Parkinson’s-Related Brain Cells by Activating Antioxidant Defense System
- Researchers at the University of Western Ontario found that cannabidiol (CBD) may protect Parkinson’s-related brain cells from oxidative stress by maintaining the activity and functionality of the antioxidant regulator Nrf2.
- The study used SH-SY5Y cells exposed to 6-hydroxydopamine to model Parkinson’s disease-related neuronal damage and observed CBD’s protective effects.
- CBD helped keep Nrf2 soluble and functional, promoted its nuclear localization, increased Ser40 phosphorylation, and upregulated antioxidant enzyme transcription, thereby enhancing cellular defense mechanisms.
- Additionally, CBD reduced reactive oxygen species, limited mitochondrial fragmentation, decreased abnormal mitophagic activity, and directly increased Nrf2 activity to support sustained cellular protection against oxidative stress.
A study from researchers at the University of Western Ontario found that cannabidiol (CBD) may help protect Parkinson’s-related brain cells from oxidative stress by keeping a key antioxidant regulator active and functional.
The study, posted as a preprint by bioRxiv, examined CBD’s effects in SH-SY5Y cells exposed to 6-hydroxydopamine, a compound commonly used in Parkinson’s disease research to model damage to dopamine-producing neurons.
Parkinson’s disease is marked in part by oxidative stress and the gradual loss of dopaminergic neurons. Researchers focused on nuclear factor erythroid 2-related factor 2, known as Nrf2, which helps coordinate the body’s cellular antioxidant response. Under severe oxidative stress, Nrf2 can misfold and become trapped in insoluble cytoplasmic inclusions, weakening the cell’s ability to defend itself.
According to the study, CBD provided strong Nrf2-dependent protection against 6-hydroxydopamine toxicity in both undifferentiated and mature, post-mitotic differentiated SH-SY5Y cells. Researchers found that CBD helped keep Nrf2 soluble and functional, increased Ser40 phosphorylation, restored nuclear localization and promoted the transcriptional upregulation of antioxidant enzymes.
The study also found that CBD reduced intracellular reactive oxygen species, significantly limited mitochondrial fragmentation and decreased abnormal mitophagic activity.
Researchers said the findings indicate CBD may do more than simply scavenge reactive oxygen species. Instead, they found that CBD directly increased Nrf2 activity during oxidative stress, supporting a sustained protective response in cells relevant to Parkinson’s disease research.