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Nrf2 Mediates the Anti-apoptotic and Anti-inflammatory Effects Induced by Gastrodin in Hydrogen Peroxide–Treated SH-SY5Y Cells

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Abstract

Redox impairment, inflammation, and increased rates of cell death are central players during neurodegeneration. In that context, activation of the transcription factor nuclear factor erythroid 2–related factor 2 (Nrf2) has been viewed as an interesting strategy in order to reduce the impact of redox dysfunction and neuroinflammation on cell fate. There is evidence indicating that the benefits caused by natural products in the brain may be due to the ability of these agents in upregulating Nrf2. Gastrodin (GAS) induces anti-oxidant, anti-inflammatory, and anti-apoptotic actions in brain cells. Nonetheless, the mechanisms underlying such effects are not clear yet. Therefore, we investigated here whether GAS would affect apoptosis and inflammation in the human neuroblastoma cell line (SH-SY5Y) exposed to hydrogen peroxide (H2O2). GAS at 1–25 μM was administrated to the cells during 30 min before a challenge with H2O2 at 300 μM for additional 24 h. GAS prevented the activation of the intrinsic apoptotic pathway by modulating the levels of Bcl-2 and Bax, causing a decrease in the release of cytochrome c to the cytosol. GAS also prevented the activation of the pro-apoptotic enzymes caspase-9 and caspase-3. Consequently, GAS abrogated poly (ADP-ribose) polymerase (PARP) cleavage and DNA fragmentation in the H2O2-treated SH-SY5Y cells. Moreover, GAS reduced the levels of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) and the activity of nuclear factor-κB in H2O2-treated cells. Silencing of Nrf2 by small interfering RNA (siRNA) suppressed the GAS-induced cytoprotection. Thus, GAS elicited anti-apoptotic and anti-inflammatory effects by a mechanism involving Nrf2 in SH-SY5Y cells.

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This work was supported by CNPq and FOPESQ/UFF.

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Correspondence to Marcos Roberto de Oliveira.

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Figure S1.

The effect of GAS on the viability of H2O2-treated SH-SY5Y cells. The cells were exposed to GAS at 1-25 μM for 30 min prior a challenge with H2O2 at 300 μM for further 24 h. Data are shown as the mean ± SEM of three or five independent experiments each done in triplicate. One-way ANOVA followed by the post hoc Tukey’s test, *p < 0.05 different from the control group; # different from H2O2-treated group. (PDF 100 kb)

Figure S2.

The effect of GAS on the levels of p65 in the nucleus of H2O2-treated SH-SY5Y cells. The cells were exposed to GAS at 25 μM for 30 min prior a challenge with H2O2 at 300 μM for further 24 h. SN50 at 0.5 μM was administrated to the cells for 1 h before exposure to GAS. Data are shown as the mean ± SEM of three or five independent experiments each done in triplicate. One-way ANOVA followed by the post hoc Tukey’s test, *p < 0.05 different from the control group; # different from H2O2-treated group. (PDF 95.9 kb)

Figure S3.

The effect of SN50 on the activity of NF-κB in H2O2-treated SH-SY5Y cells. The cells were exposed to SN50 at 0.5 μM for 1 h before a challenge with H2O2 at 300 μM for further 24 h. Data are shown as the mean ± SEM of three or five independent experiments each done in triplicate. One-way ANOVA followed by the post hoc Tukey’s test, *p < 0.05 different from the control group; # different from H2O2-treated group. (PDF 98.3 kb)

Figure S4.

The effects of silencing with siRNA (for 48 h) on the activity of Nrf2 in SH-SY5Y cells treated with GAS at 25 μM for 12 h. Data are exhibited as the mean ± SEM of three or five independent experiments each done in triplicate. One-way ANOVA followed by the post hoc Tukey’s test, * p < 0.05 vs the control group; ** p < 0.05 vs GAS-treated cells transfected with negative control (NC) siRNA. (PDF 82.5 kb)

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de Oliveira, M.R., Brasil, F.B. & Fürstenau, C.R. Nrf2 Mediates the Anti-apoptotic and Anti-inflammatory Effects Induced by Gastrodin in Hydrogen Peroxide–Treated SH-SY5Y Cells. J Mol Neurosci 69, 115–122 (2019). https://doi.org/10.1007/s12031-019-01339-3

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  • DOI: https://doi.org/10.1007/s12031-019-01339-3

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