Tuesday, July 13, 2021

Scutellarin improves the radiosensitivity of non-small cell lung cancer cells to iodine-125 seeds via downregulating the AKT/mTOR pathway

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Thorac Cancer. 2021 Jul 13. doi: 10.1111/1759-7714.14077. Online ahead of print.

ABSTRACT

BACKGROUND: In our previous study, we indicated that scutellarin (SCU) induced an anticancer effect in A549 cells. However, whether SCU regulates the radiosensitivity of non-small cell lung cancer (NSCLC) and its related mechanism is still unclear.

METHODS: In this study, we explored the anticancer effect induced by iodine-125 (125 I) and SCU at a sensitizing concentration in A 549 and H1975 cells. Cellular apoptosis and proliferation were detected by flow cytometry, Bcl-2/Bax expression level, cell cycle, CCK-8, and EdU staining. A tumor model using nude mice was also carried out to investigate the combined effect of 125 I and SCU in vivo. In addition, the expression level of AKT/mTOR pathway was detected to investigate whether it is linked to the anticancer effect of 125 I and SCU.

RESULTS: SCU at a sensitizing concentration promoted the 125 I-induced apoptosis and antiproliferative effect in A549 and H1975 cells. Moreover, the same results were obtained in vivo. Based on our findings, the AKT/mTOR pathway was significantly downregulated after combined treatment with 125 I and SCU.

CONCLUSIONS: The results of our study suggested that SCU promotes the anticancer effects induced by 125 I in NSCLC cells by downregulating the AKT/mTOR pathway and lays a foundation for future application of th is combined treatment.

PMID:34255431 | DOI:10.1111/1759-7714.14077

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