Abstract
Oxidant toxicity has been implicated in the pathogenesis of amyotrophic lateral sclerosis (ALS), an insidiously progressive neurodegenerative disorder involving upper and lower motor neurons. Here, we investigated the cellular and molecular mechanisms underlying the neuroprotective effects of an anti-oxidant genistein in SOD1-G93A transgenic mouse model of ALS. Rotarod test, hanging wire test and hindlimb clasping test were used to determined disease onset and assess motor performance. Immunostaining together with neuronal size measurement were used to count viable motor neurons. In addition, immunostaining procedure and ELISA kit were used to assess the inflammatory response in the spinal cord. Our results showed that Genistein administration suppressed the production of pro-inflammatory cytokines and alleviated gliosis in the spinal cord of SOD1-G93A mice. In addition, genistein administration induced autophagic processes and enhanced the viability of spinal motor neurons. As a result, genistein alleviated ALS-related symptoms and slightly prolonged the lifespan of SOD1-G93A mice. Taken together, our results indicate that genistein is neuroprotective in SOD1-G93A mice, suggesting genistein could be a promising treatment for human ALS. Graphical Abstract Genistein protects impariments in SOD1-G93A transgenic mouse model.
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