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Protective effect of 3-n-butylphthalide against intrastriatal injection of malonic acid-induced neurotoxicity and biochemical alteration in rats.
Biomedicine & Pharmacotherapy 2022 September 10
Mitochondrial abnormalities and a defective expression of neurotrophic factors contribute to neuronal damage in Huntington's disease (HD). HD patients showed a reduction in transforming growth factor-β1 (TGF-β1) levels in the peripheral blood and in cortical neurons. 3-n-butylphthalide (NBP) is first isolated from the seeds of celery, treats ischemic stroke in China. NBP could attenuate cognitive and motor impairments in the experimental models of Parkinson's disease and Alzheimer's disease, reduce mitochondrial oxidative stress and increase the expression of TGF-β1 in rats with focal cerebral ischemia. To our knowledge, the effect of NBP on Huntington's disease has not been reported. We proposed the hypothesis that whether NBP could protect mitochondria and regulate TGF-β1 and its downstream signaling in a HD animal model, further prevents motor dysfunction. Malonic acid is a reversible inhibitor of mitochondrial enzyme complex-II, induces energy crisis and free radical generation. In this study, we used intrastriatal injections of malonic acid in rats to mimic mitochondrial abnormalities and the other HD like symptoms. We found that treatment with NBP significantly attenuated malonic acid-induced motor and cognitive dysfunction in locomotor behaviour test, rotarod test, novel object recognition test and morris water maze test, prevented neurotoxicity and mitochondrial damage, activated TGF-β1/Akt/Wnt/β-Catenin pathway in striatum, but didn't regulate mitochondrial fusion and fission. The above effect was partly reversed by a PI3K/Akt inhibitor. Our data support NBP as a potential candidate for the treatment of HD.
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