Abstract
DL-3-n-butylphthalide (NBP)-a compound isolated from Apium graveolens seeds-is protective against brain ischemia via various mechanisms in humans and has been approved for treatment of acute ischemic stroke. NBP has shown recent potential as a treatment for Parkinson's disease. However, the underlying mechanism of action of NBP remains poorly understood. In this study, we established a rat model of Parkinson's disease by intraperitoneal injection of rotenone for 28 successive days, followed by intragastric injection of NBP for 14-28 days. We found that NBP greatly alleviated rotenone-induced motor disturbance in the rat model of Parkinson's disease, inhibited loss of dopaminergic neurons and aggregation of α-synuclein, and reduced iron deposition in the substantia nigra and iron content in serum. These changes were achieved by alterations in the expression of the iron metabolism-related proteins transferrin receptor, ferritin light chain, and transferrin 1. NBP also inhibited oxidative stress in the substantia nigra and protected mitochondria in the rat model of Parkinson's disease. Our findings suggest that NBP alleviates motor disturbance by inhibition of iron deposition, oxidative stress, and ferroptosis in the substantia nigra.
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