@article{3dd0907859254adfb883926b2980bbd6,
title = "Chromatin remodeling at Alu repeats by epigenetic treatment activates silenced microRNA-512-5p with downregulation of Mcl-1 in human gastric cancer cells",
abstract = "Epigenetic therapy using DNA methylation inhibitors and histone deacetylase (HDAC) inhibitors has clinical promise for the treatment of human malignancies. To investigate roles of microRNAs (miRNAs) on epigenetic therapy of gastric cancer, the miRNA expression profile was analysed in human gastric cancer cells treated with 5-aza-2′-deoxycytidine (5-Aza-CdR) and 4-phenylbutyric acid (PBA). miRNA microarray analysis shows that most of miRNAs activated by 5-Aza-CdR and PBA in gastric cancer cells are located at Alu repeats on chromosome 19. Analyses of chromatin modification show that DNA demethylation and HDAC inhibition at Alu repeats activates silenced miR-512-5p by RNA polymerase II. In addition, activation of miR-512-5p by epigenetic treatment induces suppression of Mcl-1, resulting in apoptosis of gastric cancer cells. These results suggest that chromatin remodeling at Alu repeats plays critical roles in the regulation of miRNA expression and that epigenetic activation of silenced Alu-associated miRNAs could be a novel therapeutic approach for gastric cancer.",
keywords = "Alu repeats, DNA methylation, Epigenetic treatment, Gastric cancer, Histone modification, MiRNA",
author = "Y. Saito and Hidekazu Suzuki and Hitoshi Tsugawa and I. Nakagawa and Juntaro Matsuzaki and Y. Kanai and T. Hibi",
note = "Funding Information: Dr Saito{\textquoteright}s work has been funded by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS). Dr Suzuki{\textquoteright}s work has been funded by a Grant-in-Aid for Exploratory Research from the JSPS. Dr Kanai{\textquoteright}s work has been funded by the Ministry of Health, Labor and Welfare of Japan. Dr Hibi{\textquoteright}s work has been funded by the JSPS and the Ministry of Education, Culture, Sports, Science and Technology. Funding Information: The authors are grateful to Dr Robert Roeder at Rockefeller University for providing antibody to Pol III. This work was supported by a Grant-in-Aid for Scientific Research C from the Japan Society for the Promotion of Science (JSPS) (19599024, to Y.S.) and a Grant-in-Aid for Exploratory Research from JSPS (19659057, to HS).",
year = "2009",
month = jul,
day = "30",
doi = "10.1038/onc.2009.140",
language = "English",
volume = "28",
pages = "2738--2744",
journal = "Oncogene",
issn = "0950-9232",
publisher = "Nature Publishing Group",
number = "30",
}
