title: Induction of the liver cancer-down-regulated long noncoding RNA uc002mbe.2 mediates trichostatin-induced apoptosis of liver cancer cells.
abstract: Differential expression of long non-coding RNAs (lncRNAs) plays critical roles in hepatocarcinogenesis. Considerable attention has focused on the antitumor effect of histone deacetylase inhibitor (Trichostatin A, TSA) as well as the coding gene expression-induced apoptosis of cancer cells. However, it is not known whether lncRNA has a role in TSA-induced apoptosis of human hepatocellular carcinoma (HCC) cells. The global expression of lncRNAs and coding genes was analyzed with the Human LncRNA Array V2.0 after 24 h treatment. Expression was verified in cell lines and tissues by quantitative real-time PCR. The data showed that 4.8% (959) of lncRNA and 6.1% (1849) of protein coding gene were significantly differentially expressed. The differential expressions of lncRNA and protein coding genes had distinguishable hierarchical clustering expression profiling pattern. Among these differentially expressed lncRNAs, the greatest change was noted for uc002mbe.2, which had more than 300 folds induction upon TSA treatment. TSA selectively induced uc002mbe.2 in four studied HCC cell lines. Compared with normal human hepatocytes and adjacent noncancerous tissues, uc002mbe.2 expression level was significantly lower in the HCC cell lines and liver cancer tissues. The TSA-induced uc002mbe.2 expression was positively correlated with the apoptotic effect of TSA in HCC cells. In addition, knockdown the expression of uc002mbe.2 significantly reduced TSA-induced apoptosis of Huh7cells. Therefore, TSA-induced apoptosis of HCC cells is uc002mbe.2 dependent and reduced expression of uc002mbe.2 may be associated with liver carcinogenesis.
authors: Department of Gastroenterology, Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China. yanghui030454@gmail.com
authors: Hui
authors: H
authors: Yang
authors: Yun
authors: Y
authors: Zhong
authors: Hui
authors: H
authors: Xie
authors: Xiaobo
authors: X
authors: Lai
authors: Miqing
authors: M
authors: Xu
authors: Yuqiang
authors: Y
authors: Nie
authors: Shiming
authors: S
authors: Liu
authors: Yu-Jui Yvonne
authors: YJ
authors: Wan
mesh_terms: D017209:Apoptosis / Q000187:drug effects / Q000502:physiology*; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology*; D045744:Cell Line, Tumor; D015536:Down-Regulation / Q000187:drug effects / Q000502:physiology*; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects / Q000502:physiology; D056945:Hep G2 Cells; D006801:Humans; D006877:Hydroxamic Acids / Q000037:antagonists & inhibitors / Q000494:pharmacology* / Q000627:therapeutic use; D008113:Liver Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology*; D062085:RNA, Long Noncoding / Q000037:antagonists & inhibitors / Q000096:biosynthesis* / Q000502:physiology
chemical_list: D006877:Hydroxamic Acids; D062085:RNA, Long Noncoding; C012589:trichostatin A
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