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  • Title: Maslinic Acid Protected PC12 Cells Differentiated by Nerve Growth Factor against β-Amyloid-Induced Apoptosis.
    Author: Yang YW, Tsai CW, Mong MC, Yin MC.
    Journal: J Agric Food Chem; 2015 Dec 02; 63(47):10243-9. PubMed ID: 26477978.
    Abstract:
    β-Amyloid peptide (Abeta) was used to induce apoptosis in PC12 cells differentiated by nerve growth factor, and the protective activities of maslinic acid (MA) at 2-16 μM were examined. Abeta treatment lowered Bcl-2 expression, raised Bax expression, and decreased cell viability. MA pretreatments decreased Bax expression, raised the Bcl-2/Bax ratio, and increased cell viability. MA pretreatments retained glutathione content and decreased subsequent Abeta-induced release of reactive oxygen species, tumor necrosis factor-α, interleukin (IL)-1β, and IL-6. Abeta treatment up-regulated protein expression of p47(phox), gp91(phox), mitogen-activated protein kinase, advanced glycation end product receptor (RAGE), and nuclear factor-κ B (NF-κB). MA pretreatments at 2-16 μM suppressed the expression of proteins including gp91(phox), p47(phox), p-p38, and NF-κB p65, at 4-16 μM down-regulated RAGE and NF-κB p50 expression, and at 8 and 16 μM reduced p-ERK1/2 expression. These novel findings suggest that maslinic acid is a potent compound against Abeta-induced cytotoxicity.
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