[No authors listed]
Accumulation of amyloid β-peptide (Aβ) in the brain of Alzheimer disease (AD) patients is believed to be the main pathological feature of the disease. Meanwhile, miR-98-5p dysregulation was found in AD. However, whether miR-98-5p is involved in the accumulation of Aβ in AD, the underlying molecule mechanism remains unclear. In the present study, we confirmed that miR-98-5p negatively regulated sorting nexin 6 (SNX6) expression by targeting the 3'-UTR of SNX6 mRNA. Downregulation of miR-98-5p alleviated Aβ-induced viability inhibition and decreased apoptosis in SK-N-SH and SH-SY5Y cells by upregulating SNX6 expression. Furthermore, downregulation of miR-98-5p decreased SNX6-dependent levels of Aβ40, Aβ42, β-site APP-cleaving enzyme 1 (BACE1), soluble amyloid precursor protein β (sAPPβ), and membrane-associated APP β-carboxyl terminal fragment (βCTF) in SK-N-SH and HEK293 cells. Our findings demonstrate that miR-98-5p modulates SNX6 expression and thus plays a critical role in accumulation of Aβ. Therefore, miR-98-5p may be a novel therapeutic target for AD.
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