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- W3125698712 abstract "MicroRNAs (miRNAs or miRs) exert either as tumor-inhibiting or oncogenic roles in tumorigenesis of lung cancer. In the present study, we identified a novel microRNA (miR)-27a as being involved in the radiosensitivity of lung cancer cells. Therefore, we sought to characterize its potential underlying mechanism in lung cancer cell sensitivity to radiotherapy. To this end, A549 and H460 cells irradiated with 8 Gy irradiation (IR) were used as a cell model. RT-qPCR exhibited that the expression of miR-27a increased, whereas ZEB1 was poorly expressed in A549 and H460 cells exposed to IR. As reflected by dual-luciferase reporter gene assay, miR-27a could target and inversely modulate ZEB1 expression. Gain- and loss-of-function experiments exhibited that miR-27 inhibition promoted proliferation of IR-treated A549 and H460 cells and reduced the sensitivity of A549 and H460 cells to radiotherapy, which was rescued by silencing of ZEB1. Further, miR-27a inhibition disrupted the homologous recombination (HR)-mediated DNA repair, evidenced by reduced ATM, pCHK2 and Rad51 levels. Collectively, miR-27a activates HR-mediated DNA repair by inhibiting ZEB1 expression to enhance the radiosensitivity of lung cancer cells, highlighting a therapeutic target for lung cancer radiosensitivity." @default.
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- W3125698712 date "2021-01-27" @default.
- W3125698712 modified "2023-09-23" @default.
- W3125698712 title "Radio-sensitizing effects of microRNA-27a elevation in lung cancer cells by inhibiting ZEB1 expression and activating DNA damage repair pathway." @default.
- W3125698712 doi "https://doi.org/10.23812/20-502-a" @default.
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