Abstract
Lilium brownii (L. brownii) is a plant that can be used for both medicine and food. Its bulbs are commonly used to treat neurological disorders like depression, insomnia, and Parkinson's disease (PD). However, the mechanism by which it treats PD is not yet fully understood. This study aims to investigate the possible mechanism of L. brownii extract in treating PD and to compare the efficacy of ethanol and aqueous extracts of L. brownii. In this study, mice with PD induced by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine hydrochloride (MPTP) were given L. brownii extracts for 30 days, and the effects of both extracts were then evaluated. Our study demonstrated that both extracts of L. brownii effectively improved motor dysfunction in PD mice induced by MPTP. Additionally, they increased the number of neurons in the substantia nigra region of the mice. Moreover, both extracts reduced levels of malondialdehyde (MDA) and ferrous ion (Fe2+), while increasing levels of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in serum. They also influenced the expression of proteins associated with the p62-Keap1-Nrf2 pathway. Interestingly, while both extracts had similar behavioral effects, the ethanol extract appeared to have a more significant impact on individual proteins in the p62-Keap1-Nrf2 pathway compared to the aqueous extract, possibly due to its higher phenolic acid glyceride content. In conclusion, L. brownii shows promise as an effective and safe treatment for PD.
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