Lijuan Wen1,2, Lei Liu3, Lina Wen4, Tao Yu2, Fengxiang Wei5,6. 1. Shenzhen Longgang District Maternal and Child Health Care Hospital, Shenzhen, 518000, Guangdong, People's Republic of China. 2. Zunyi Medical University, Zunyi, 063000, Guizhou, People's Republic of China. 3. Jiamusi University, Jiamusi, 154007, Heilongjiang, People's Republic of China. 4. Liaocheng People's Hospital, Liaocheng, 252000, Shandong, People's Republic of China. 5. Shenzhen Longgang District Maternal and Child Health Care Hospital, Shenzhen, 518000, Guangdong, People's Republic of China. haowei727499@163.com. 6. Zunyi Medical University, Zunyi, 063000, Guizhou, People's Republic of China. haowei727499@163.com.
Abstract
BACKGROUND: Recent studies have revealed that artesunate (ART) has clear anti-tumor activity, suggesting that it could be a good candidate chemotherapeutic agent. In this study, we researched the inhibitory effect of ART on MCF7 cells and explored the possible mechanisms. METHODS: MTT assay was used to detect the effect of ART on the proliferation of MCF7 cells. Crystal violet staining was used to observe morphological and quantitative changes. Flow cytometry was used to detect the cell cycle of the drug-acting MCF7 cells. In addition, western blotting was used to detect the drug influence on expression of the ATM, phospho-ATM(S1981), H2AX, γH2AX(S139), CHK2 and phospho-CHK2(T68), cdc25C, and phospho-cdc25C(S216). RESULTS: In the experimental groups, the proliferation of MCF7 cells was inhibited in a dose-dependent manner and the original cell morphology was lost. The number of G2/M phase cells in the experimental groups increased significantly, and the expression of DNA damage response-associated proteins was significantly increased, such as phospho-ATM(S1981), γH2AX(S139), phospho-CHK2(T68), and phospho-cdc25C(S216). CONCLUSIONS: ART can inhibit cell proliferation and promote G2/M arrest in MCF7 cells through ATM activation and the ensuing "ATM-Chk2-Cdc25C" pathway, thus implicating ART as a novel candidate for breast cancer chemotherapy.
BACKGROUND: Recent studies have revealed that artesunate (ART) has clear anti-tumor activity, suggesting that it could be a good candidate chemotherapeutic agent. In this study, we researched the inhibitory effect of ART on MCF7 cells and explored the possible mechanisms. METHODS:MTT assay was used to detect the effect of ART on the proliferation of MCF7 cells. Crystal violet staining was used to observe morphological and quantitative changes. Flow cytometry was used to detect the cell cycle of the drug-acting MCF7 cells. In addition, western blotting was used to detect the drug influence on expression of the ATM, phospho-ATM(S1981), H2AX, γH2AX(S139), CHK2 and phospho-CHK2(T68), cdc25C, and phospho-cdc25C(S216). RESULTS: In the experimental groups, the proliferation of MCF7 cells was inhibited in a dose-dependent manner and the original cell morphology was lost. The number of G2/M phase cells in the experimental groups increased significantly, and the expression of DNA damage response-associated proteins was significantly increased, such as phospho-ATM(S1981), γH2AX(S139), phospho-CHK2(T68), and phospho-cdc25C(S216). CONCLUSIONS:ART can inhibit cell proliferation and promote G2/M arrest in MCF7 cells through ATM activation and the ensuing "ATM-Chk2-Cdc25C" pathway, thus implicating ART as a novel candidate for breast cancer chemotherapy.
Entities:
Keywords:
Artesunate; Cell cycle; DNA damage response; MCF7 cell
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