title: Expression and clinical significance of the long non-coding RNA PVT1 in human gastric cancer.
abstract: BACKGROUND
  Highly sensitive markers are urgently needed for the diagnosis and grading of gastric cancer and for managing drug resistance. The recent identification of long-non-coding RNAs (lncRNAs) has provided new approaches for resolving this challenge. The aim of this study was to screen and identify new biomarkers for human gastric cancer from lncRNAs.
  
  
  METHODS
  First, we used lncRNA microarrays to conduct a preliminary screening for candidate lncRNAs of gastric cancer biomarkers in both human gastric cancer tissues and in two gastric cancer cell lines, SGC7901 cells and paclitaxel-resistant SGC7901 cells. The lncRNA plasma-cytoma variant translocation 1 (PVT1) was found to exhibit higher expression in both gastric cancer tissues and the SGC7901 paclitaxel-resistant cell line. Quantitative polymerase chain reaction was used for large-scale analysis in a large number of human gastric cancer tissues to verify the involvement of PVT1 in development of gastric cancer. The relationships between PVT1 expression and clinical features were also analyzed.
  
  
  RESULTS
  PVT1 showed higher expression in human gastric cancer tissues than in adjacent non-cancerous tissues and in SGC7901 paclitaxel-resistant cells compared with SGC7901 cells. PVT1 expression was correlated with lymph node invasion of gastric cancer.
  
  
  CONCLUSIONS
  PVT1 is a new biomarker for human gastric cancer and may indicate lymph node invasion. Therefore, PVT1 shows potential as a novel therapeutic target for the treatment of gastric cancer and enhancement of paclitaxel sensitivity.
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Ding
authors.affiliation: Digestive Department of Union Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Minzhen
authors.initials: M
authors.lastname: Gong
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Jinpo
authors.initials: J
authors.lastname: Wang
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Xunru
authors.initials: X
authors.lastname: Huang
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Wu
authors.affiliation: Digestive Department of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China.
authors.forename: Chengdang
authors.initials: C
authors.lastname: Wang
keywords: lymph node invasion; microarray analysis; paclitaxel resistance; quantitative polymerase chain reaction; tumor biomarkers