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        Spinosin Inhibits Aβ<sub>1-42</sub> Production and Aggregation via Activating Nrf2/HO-1 Pathway

        ( Xiaoying Zhang ),( Jinyu Wang ),( Guowei Gong ),( Ruixin Ma ),( Fanxing Xu ),( Tingxu Yan ),( Bo Wu ),( Ying Jia ) 한국응용약물학회 2020 Biomolecules & Therapeutics(구 응용약물학회지) Vol.28 No.3

        The present research work primarily investigated whether spinosin has the potential of improving the pathogenesis of Alzheimer’s disease (AD) driven by β-amyloid (Aβ) overproduction through impacting the procession of amyloid precursor protein (APP). Wild type mouse Neuro-2a cells (N2a/WT) and N2a stably expressing human APP695 (N2a/APP695) cells were treated with spinosin for 24 h. The levels of APP protein and secreted enzymes closely related to APP procession were examined by western blot analysis. Oxidative stress related proteins, such as nuclear factor-erythroid 2-related factor 2 (Nrf2), and heme oxygenase-1 (HO-1) were detected by immunofluorescence assay and western blot analysis, respectively. The intracellular reactive oxygen species (ROS) level was analyzed by flow cytometry, the levels of Aβ<sub>1-42 </sub>were determined by ELISA kit, and Thioflavin T (ThT) assay was used to detect the effect of spinosin on Aβ<sub>1-42 </sub>aggregation. The results showed that ROS induced the expression of ADAM10 and reduced the expression of BACE1, while spinosin inhibited ROS production by activating Nrf2 and up-regulating the expression of HO-1. Additionally, spinosin reduced Aβ<sub>1-42 </sub>production by impacting the procession of APP. In addition, spinosin inhibited the aggregation of Aβ<sub>1-42</sub>. In conclusion, spinosin reduced Aβ<sub>1-42</sub> production by activating the Nrf2/HO-1 pathway in N2a/WT and N2a/ APP695 cells. Therefore, spinosin is expected to be a promising treatment of AD.

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