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Nutrients 2018, 10(7), 853; https://doi.org/10.3390/nu10070853

Neuroprotective Effects of Soy Isoflavones on Scopolamine-Induced Amnesia in Mice

1
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
2
Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing 100193, China
*
Author to whom correspondence should be addressed.
Received: 6 June 2018 / Revised: 26 June 2018 / Accepted: 28 June 2018 / Published: 30 June 2018
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Abstract

In the recent years, interest in soybean as a neuroprotective nutrient in the management of Alzheimer’s disease (AD) has increased and soy isoflavones (SI), as kinds of soybean phytochemicals, are thought to be biologically active components that confer this beneficial effect against neurodegenerative diseases. However, the neuroprotective effect of SI is not well understood. Therefore, the present study (30 days) was conducted to investigate the neuroprotective effects of soy isoflavones (SI) on scopolamine (SCOP)-induced memory impairments in Institute of Cancer Research (ICR) mice (aged 4 weeks) and to elucidate its underlying mechanisms of action. SI (40 mg/kg) administration improved the cognitive performance of SCOP-treated mice in an object location recognition task and the Morris water maze test. SI (40 mg/kg) administration significantly enhanced cholinergic system function and suppressed oxidative stress levels in the hippocampus of SCOP-treated mice. Furthermore, SI (40 mg/kg) treatment markedly upregulated the phosphorylation levels of extracellular signal-regulated kinase (ERK), cAMP response element-binding protein (CREB) and brain-derived neurotrophic factor (BDNF) expression levels in the hippocampus. Taken together, these results demonstrated that soy isoflavones exerted a significant neuroprotective effect on cognitive dysfunctions induced by scopolamine, suggesting that soy isoflavones could be a good candidate for possible treatment of neurodegenerative diseases, such as Alzheimer’s disease (AD). View Full-Text
Keywords: soy isoflavones; scopolamine; learning and memory; cholinergic system function; oxidative stress; ERK/CREB/BDNF pathway soy isoflavones; scopolamine; learning and memory; cholinergic system function; oxidative stress; ERK/CREB/BDNF pathway
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Lu, C.; Wang, Y.; Wang, D.; Zhang, L.; Lv, J.; Jiang, N.; Fan, B.; Liu, X.; Wang, F. Neuroprotective Effects of Soy Isoflavones on Scopolamine-Induced Amnesia in Mice. Nutrients 2018, 10, 853.

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