Accumulated evidence has manifested that
long noncoding RNA (
lncRNA) is involved in the progress of
Parkinson's disease (PD). SNHG7, a novel
lncRNA, has been found to be involved in
tumorigenesis. However, SNHG7 expression and its functional effects on PD remain uncharted.
Rotenone (Rot) was adopted to construct PD models in Sprague-Dawley (SD) rats and SH-SY5Y cells, respectively. The expression levels of
caspase 3,
tyrosine hydroxylase (TH), ionized
calcium-binding adapter molecule 1 (Iba1) in SD rat striatum were measured via immunohistochemistry and western blot. Additionally, the expressions of inflammatory
cytokines (
interleukin 1β [IL-1β], IL-6,
tumor necrosis factor α) and oxidative stress factors (
malondialdehyde,
superoxide dismutase, and
glutathione peroxidase) in the brain tissues were examined using real-time polymerase chain reaction and
enzyme-linked
immunosorbent assay, respectively. Moreover, the
protein levels of
tumor necrosis factor receptor-associated factor (
TRAF5), I-κB, nuclear factor-κB (NF-κB), HO-1, Nrf2 were detected via western blot. Bioinformatics was applied to predict the targeting relationship between SNHG7, miR-425-5p, and
TRAF5. Dual-
luciferase activity assay and
RNA immunoprecipitation assays were conducted to verify their interactions. In comparison to healthy donors, SNHG7 was found upregulated while miR-425-5p expression was downregulated in PD patients. Functional experiments confirmed that SNHG7 downregulation or miR-425-5p overexpression attenuated neuronal apoptosis in the Rot-mediated PD model, TH-positive cell loss, and microglial activation by mitigating
inflammation and oxidative stress. Mechanistically, SNHG7 served as a
competitive endogenous RNA by sponging miR-425-5p and promoted
TRAF5 mediated
inflammation and oxidative stress. Inhibition of SNHG7 ameliorated neuronal apoptosis in PD through relieving miR-425-5p/
TRAF5/NF-κB signaling pathway modulated
inflammation and oxidative stress, and similar results were observed in the Rot-mediated rat model of PD.