@article {MAKI4871, author = {YUHO MAKI and HIROAKI ASANO and SHINICHI TOYOOKA and JUNICHI SOH and TAKAFUMI KUBO and KUNIAKI KATSUI and TSUYOSHI UENO and KAZUHIKO SHIEN and TAKAYUKI MURAOKA and NORIMITSU TANAKA and HIROMASA YAMAMOTO and KAZUNORI TSUKUDA and TAKUMI KISHIMOTO and SUSUMU KANAZAWA and SHINICHIRO MIYOSHI}, title = {MicroRNA miR-34b/c Enhances Cellular Radiosensitivity of Malignant Pleural Mesothelioma Cells}, volume = {32}, number = {11}, pages = {4871--4875}, year = {2012}, publisher = {International Institute of Anticancer Research}, abstract = {Background: We previously reported that epigenetic silencing of microRNA-34b/c (miR-34b/c) plays an important role in the pathogenesis of malignant pleural mesothelioma (MPM). We examined the impact of miR-34b/c restoration on the radiosensitivity of MPM cells. Materials and Methods: We established stable miR-34b/c and scramble transfectants of two MPM cell lines, H2052 and H28. We examined these transfectants by clonogenic survival assay, phosphorylated histone H2AX (γH2AX) foci assay, cell-cycle analysis, and western blotting. Results: The clonogenic survival assay revealed that miR-34b/c radiosensitized MPM cells. γH2AX foci assay showed that DNA double-strand break repair was delayed in miR-34b/c transfectants. The proportion of sub-G1 phase cells was increased in miR-34b/c transfectants after irradiation. miR-34b/c inhibited expression of cyclin-D1, cyclin-dependent kinase 4/6, B-cell lymphoma-2 (BCL-2) and increased cleaved poly (ADP-ribose) polymerase (cPARP) and cleaved caspase-3 after irradiation. Conclusion: Our results indicate that miR-34b/c enhances radiosensitivity by promoting radiation-induced apoptosis and suggested that miR-34b/c might be a useful therapeutic molecule to enhance radiotherapy in MPM.}, issn = {0250-7005}, URL = {https://ar.iiarjournals.org/content/32/11/4871}, eprint = {https://ar.iiarjournals.org/content/32/11/4871.full.pdf}, journal = {Anticancer Research} }