title: Downregulation of ALDOB is associated with poor prognosis of patients with gastric cancer.
abstract: OBJECTIVE
  To examine the expression of ALDOB in gastric cancer (GC) tissue and to reveal its potential clinicopathological and prognostic significance.
  
  
  METHODS
  We screened for genes that were differentially expressed between GC and nontumor tissues using a microarray, specifically the Affymetrix U133 Plus 2.0 Array platform. We then verified the transcriptional and translational levels of ALDOB by performing quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry (IHC). In addition, a merged data set based on the Gene Expression Omnibus was generated and a survival analysis performed.
  
  
  RESULTS
  The microarray analysis revealed thatALDOBwas downregulated (more than sevenfold) in GC compared with nontumor tissue. Both qRT-PCR and IHC validated the decrease of ALDOB in GC tissue. Moreover, we found that the expression of ALDOB was significantly related to tumor-invasion depth, lymph-node metastasis, distant metastasis, and TNM stage. The survival analysis, based on the IHC and merged data set, indicated that the overall survival was better in patients with high ALDOB expression. The Cox regression analysis showed that ALDOB expression was an independent prognostic factor for GC.
  
  
  CONCLUSIONS
  The expression of ALDOB in GC tissue was significantly related to the clinicopathological features and prognosis of the disease, thus suggesting that ALDOB could act as a novel molecular marker for GC.
authors: Department of Gastroenterology and Pancreatic Surgery.
authors: Jun
authors: J
authors: He
authors: Department of Gastroenterology and Pancreatic Surgery.
authors: Yi
authors: Y
authors: Jin
authors: Department of Pathology.
authors: Yuan
authors: Y
authors: Chen
authors: Department of Gastroenterology and Pancreatic Surgery.
authors: Hai-Bo
authors: HB
authors: Yao
authors: Key Laboratory of Gastroenterology of Zhejiang Province.
authors: Ying-Jie
authors: YJ
authors: Xia
authors: Clinic Research Institute, Zhejiang Provincial People's Hospital, Hangzhou, People's Republic of China.
authors: Ying-Yu
authors: YY
authors: Ma
authors: Department of Pathology.
authors: Wei
authors: W
authors: Wang
authors: Department of Gastroenterology and Pancreatic Surgery.
authors: Qin-Shu
authors: QS
authors: Shao
keywords: ALDOB; gastric cancer; microarray analysis; molecular marker