Ginsenoside Rh2 Improves the Cisplatin Anti-tumor Effect in Lung Adenocarcinoma A549 Cells via Superoxide and PD-L1

Author(s): Yingying Chen, Yuqiang Zhang, Wei Song, Ying Zhang, Xiu Dong, Mingqi Tan*

Journal Name: Anti-Cancer Agents in Medicinal Chemistry
(Formerly Current Medicinal Chemistry - Anti-Cancer Agents)

Volume 20 , Issue 4 , 2020


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Abstract:

Background: Ginsenoside Rh2 (Rh2) is a major biological component of ginseng that exerts antitumor activities in multiple cancers including Non-Small Cell Lung Cancers (NSCLCs). Rh2 also enhances the anti-tumor effects of various chemotherapy drugs including cisplatin at relatively low concentrations. Here, the mechanistic role of Rh2 in chemotherapy-treated NSCLCs will be investigated.

Methods: In this study, FACS, western blot and siRNA addition were used to analyze the role of Rh2 in cisplatin- treated lung adenocarcinoma A549 and H1299 cells.

Results: Subsequent observations indicated that Rh2 enhanced cisplatin-induced NSCLCs A549 and H1299 cells apoptosis. Cisplatin-induced productive autophagy was repressed by Rh2 in A549 cells. Rh2 also enhanced cisplatin cytotoxicity by elevating superoxide dismutase activity and repressing cisplatin-induced superoxide generation. Conversely, Rh2 was found to repress cisplatin-induced phosphorylation of epidermal growth factor receptor, phosphoinositide 3-kinase, protein kinase B, and autophagy. Cisplatin-induced Programmed Death- Ligand 1 (PD-L1) expression was repressed by Rh2 via the superoxide.

Conclusion: These findings suggest that Rh2 enhanced the function of cisplatin by repressing superoxide generation, PD-L1 expression, and autophagy in lung adenocarcinoma cells.

Keywords: Cisplatin, ginsenoside Rh2, lung adenocarcinoma, PD-L1, superoxide, anti-tumor.

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VOLUME: 20
ISSUE: 4
Year: 2020
Published on: 15 May, 2020
Page: [495 - 503]
Pages: 9
DOI: 10.2174/1871520619666191209091230
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