title: Inhibition of miR-630 enhances the cell resistance to radiation by directly targeting CDC14A in human glioma.
abstract: Radio-resistance becomes a large obstacle for effective cancer treatment. MicroRNAs (miRNAs) play important roles in response to radiation. However, the underlying mechanism of miR-630 on the radio-resistance of human glioma is less elucidated. In this study, we found that miR-630 was downregulated in glioma cell lines after radiation. MiR-630 inhibition enhanced the survival fraction, cell number in S stage and colony formation ability in glioma cells after radiation, while miR-630 overexpression resulted in inverse effects. By detecting the molecular mechanism of miR-630, we validated that CDC14A was a direct target of miR-630 and miR-630 suppressed CDC14A protein level. CDC14A overexpression can attenuate the inhibitory roles of miR-630 in survival fraction and cell proliferation. Finally, in vivo study demonstrated that miR-630 inhibition increased the volumes of xenografts bearing with glioma cells after radiation. In conclusion, our data indicate that anti-miR-630 enhances the radio-resistance of human glioma cells by targeting CDC14A, implying that miR-630 may act as a novel therapeutic target for enhancing the radiation efficiency on glioma patients.
authors.affiliation: College of Biomedical Engineering, Tianjin Medical University Tianjin 300070, P.R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Biomedical Engineering, Tianjin Medical University Tianjin 300070, P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Biomedical Engineering, Tianjin Medical University Tianjin 300070, P.R. China.
authors.forename: Zhi-Xiao
authors.initials: ZX
authors.lastname: Xue
keywords: CDC14A; glioma; miR-630; microRNA; radio-resistance