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        Cerebrosides from Sea Cucumber Protect Against Oxidative Stress in SAMP8 Mice and PC12 Cells

        Hongxia Che,Lei Du,Peixu Cong,Suyuan Tao,Ning Ding,Fengjuan Wu,Changhu Xue,Jie Xu,Yuming Wang 한국식품영양과학회 2017 Journal of medicinal food Vol.20 No.4

        Alzheimer's disease (AD) is a neurodegenerative disorder. Emerging evidence implicates β-amyloid (Aβ) plays a critical role in the progression of AD. In this study, we investigated the protective effect of cerebrosides obtained from sea cucumber against senescence-accelerated mouse prone 8 (SAMP8) mice in vivo. We also studied the effect of cerebrosides on Aβ-induced cytotoxicity on the rat pheochromocytoma cell (PC12) and the underlying molecular mechanisms. Cerebrosides ameliorated learning and memory deficits and the Aβ accumulation in demented mice, decreased the content of malondialdehyde (MDA), 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-OHdG), 8-hydroxy-2′-deoxyguanosine (8-oxo-G), and nitric oxide (NO), and enhanced the superoxide dismutase (SOD) activity significantly. The neuroprotective effect of sea cucumber cerebrosides (SCC) was also verified in vitro: the cerebrosides increased the survival rate of PC12 cells, recovered the cellular morphology, downregulated the protein levels of Caspase-9, cleaved Caspase-3, total Caspase-3, and Bax, and upregulated the protein level of Bcl-2, revealing that cerebrosides could inhibit Aβ-induced cell apoptosis. The results showed the protective effect of SCC was regulated by the mitochondria-dependent apoptotic pathway. Our results provide a new approach to developing the marine organisms as functional foods for neuroprotection.

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