Diabetic complications in pregnancy: is resveratrol a solution?

Protective effects of resveratrol against alcohol-induced oxidative stress and apoptosis in human SH-SY5Y cells

AIM: To assess the effects of resveratrol as an antioxidant against alcohol-induced oxidative stress and apoptosis in SH-SY5Y cells and explore the underlying mechanisms.

METHODS: SH-SY5Y cells were pretreated with resveratrol for 24 h before treatment with alcohol to induce oxidative stress and apoptosis. MTT assay was then performed to detect the viability of SH-SY5Y cells in both resveratrol-treated and control groups. ELISA was performed to detect the presence of superoxide dismutase (SOD) and the level of total intracellular reactive oxygen species (ROS). Flow cytometry was used to detect cell apoptosis. RT-PCR was performed to detect the expression levels of SOD₁, SOD₂, catalase, PARP and Caspase 3, which are key genes involved in anti-oxidation and apoptosis pathways.

RESULTS: MTT assay showed that in comparison with control cells (non-treated with resveratrol), toxicity of resveratrol (25, 50, 100 μmol/L) towards SH-SY5Y cells was below 20%. Treatment with 300 mmol/L alcohol without pre-treatment with resveratrol resulted in death of around 57% cells. Resveratrol at concentrations from 25-100 μmol/L played an antagonistic role against cytotoxicity of 300 mmol/L alcohol to SH-SY5Ycells. ELISA results showed that SOD activity was significantly higher in cells treated with 100 μmol/L resveratrol (0.559 ± 0.021) than in non-treated cells (0.296 ± 0.023). After alcohol induction, non-resveratrol-treated cells showed a higher ROS level (16163.89 ± 624.67) compared to cells treated with 25, 50, and 100 μmol/L resveratrol (29302.79.26 ± 1208.38; 25528.34 ± 1126.63; 20219.78 ± 1622.35). Flow cytometry showed that the percentage of apoptotic cells in alcohol treated cells were higher than those in other groups. RT-PCR results showed that compared to cells treated with 300 mmol/L alcohol, resveratrol increased the expression of SOD₁ (0.623 ± 0.033; 0.686 ± 0.022; 0.853 ± 0.014), SOD₂ (1.19 ± 0.123; 0,928 ± 0.0121; 1.09 ± 0.0101), catalase (1.828 ± 0.067; 2.018 ± 0.079; 2.196 ± 0.081), PARP (2.828 ± 0.161; 3.018 ± 0.208; 4.196 ± 0.190) and Caspase3 (5.828 ± 0.367; 5.318 ± 0.279; 4.196 ± 0.200).

CONCLUSION: Our findings show the neuroprotective of resveratrol against alcohol-induced oxidative stress and apoptosis in SH-SY5Y cells.