Effects of flavonoids from Gynostemma pentaphyllum on A549 cells damaged by hydrogen peroxide.
10.19540/j.cnki.cjcmm.2018.0034
- Author:
Yu-Rong WANG
1
;
Kang YANG
1
;
Wei-Ye CUI
1
;
Xiang-Lan PIAO
1
Author Information
1. School of Pharmacy, Minzu University of China, Beijing 100081, China.
- Publication Type:Journal Article
- Keywords:
A549 cell;
Gynostemma pentaphyllum;
H₂O₂;
antioxidant;
flavonoid
- From:
China Journal of Chinese Materia Medica
2018;43(5):1014-1020
- CountryChina
- Language:Chinese
-
Abstract:
This study focuses on the therapeutical effect of flavonoids from Gynostemma pentaphyllum on human lung carcinoma A549 cells induced by H₂O₂ oxidative stress and its possible mechanisms. The oxidative damage model was established using different concentrations H₂O₂ to induce A549 cell for different hours, and then treated with the flavonoids for 10 hours. The effects of flavonoids from G. pentaphyllum on cell viability of A549 cell damaged by H₂O₂ were detected by MTT assay. The contents of ROS were detected by DCFH-DA fluorescent probe method via flow cytometer. The contents of MDA, SOD and GSH were detected by TBA，NBT and DTNB-linked colorimetry assay, respectively. Expressions levels of Nrf2, NQO1 and HO-1 in A549 cells were evaluated by Western blot. The results showed that the cell activity was decreasing with the rise of H₂O₂ concentration within the range of 200-700 μmol·L⁻¹. The cell viability was 60.4% after treated with 500 μmol·L⁻¹H₂O₂ for 10 h, so it was chosen to be as an oxidant stress model. Compared with normal group，the contents of SOD, GSH and HO-1 expressions were lower after damaged with H₂O₂. On the contrary, the contents of ROS and MDA expressions were increased. Compared with model group, the contents of SOD, GSH and the expressions of Nrf2, NQO1 and HO-1 were increased after treated with flavonoids from G. pentaphyllum. The above results demonstrate that flavonoids from G. pentaphyllum may attenuate the effect of H₂O₂-induced oxidative stress on A549 cell by resisting oxidation. The finding may provide a biological evidence for the application of the G. pentaphyllum to fight the oxidative stress related diseases.
