Abstract
Parkinson’s disease (PD) is a neurodegenerative disorder characterized by the loss of dopaminergic neurons. LncRNA small nucleolar RNA host gene 14 (SNHG14) was found to promote neuron injury in PD. Here, we investigated the mechanisms of SNHG14 in PD process. In vivo or in vitro PD model was established by using 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced mice or 1-methyl-4-phenylpyridinium (MPP +)-stimulated SK-N-SH cells. The expression of genes and proteins was measured by qRT-PCR and Western blot. In vitro assays were conducted using ELISA, CCK-8, colony formation, EdU, flow cytometry, and Western blot assays, respectively. The oxidative stress was evaluated by determining the production of superoxide dismutase (SOD) and malondialdehyde (MDA). The direct interactions between miR-375-3p and NFAT5 (Nuclear factor of activated T-cells 5) or SNHG14 was verified using dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. SNHG14 and NFAT5 were elevated, while miR-375-3p was decreased in MPTP-mediated PD mouse model and MPP + -induced SK-N-SH cells. Knockdown of SNHG14 or NFAT5, or overexpression of miR-375-3p reversed MPP + -induced neuronal apoptosis, inflammation, and oxidative stress. Mechanistically, SNHG14 directly bound to miR-375, which targeted NFAT5. Inhibition of miR-375-3p abolished the inhibitory activity of SNHG14 knockdown on MPP + -evoked neuronal damage. Besides that, NFAT5 up-regulation counteracted the effects of miR-375-3p on MPP + -mediated neuronal damage. SNHG14 contributed to MPP + -induced neuronal injury by miR-375/NFAT5 axis, suggesting a new insight into the pathogenesis of PD.
Graphical Abstract
MPP + elevated SNHG14, which then increased NFAT5 by sequestering miR-375, thereby contributing to MPP + -induced inflammation, apoptosis, oxidative stress, and arrest of proliferation in neurons.
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The analyzed data sets generated during the present study are available from the corresponding author on reasonable request.
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NB and XL designed and performed the research, FX wrote the manuscript. All authors read and approved the final manuscript.
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11064_2024_4106_MOESM1_ESM.tif
Supplementary file1 (TIF 41 KB)—The viability of SK-N-SH cells treated with MPP+ (0, 0.5, 1, and 2 mM) for 24 h. one-way ANOVA, n=3.
11064_2024_4106_MOESM2_ESM.tif
Supplementary file2 (TIF 50 KB)—qRT-PCR analysis for SNHG14 expression in the subcellular fractions of MPP+ treated SK-N-SH cells. n=3.
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Xu, F., Bian, N. & Li, X. SNHG14 Elevates NFAT5 Expression Through Sequestering miR-375-3p to Promote MPP + -Induced Neuronal Apoptosis, Inflammation, and Oxidative Stress in Parkinson’s Disease. Neurochem Res 49, 1212–1225 (2024). https://doi.org/10.1007/s11064-024-04106-y
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DOI: https://doi.org/10.1007/s11064-024-04106-y