title: Systematic analysis of molecular mechanisms for HCC metastasis via text mining approach.
abstract: OBJECTIVE
  To systematically explore the molecular mechanism for hepatocellular carcinoma (HCC) metastasis and identify regulatory genes with text mining methods.
  
  
  RESULTS
  Genes with highest frequencies and significant pathways related to HCC metastasis were listed. A handful of proteins such as EGFR, MDM2, TP53 and APP, were identified as hub nodes in PPI (protein-protein interaction) network. Compared with unique genes for HBV-HCCs, genes particular to HCV-HCCs were less, but may participate in more extensive signaling processes. VEGFA, PI3KCA, MAPK1, MMP9 and other genes may play important roles in multiple phenotypes of metastasis.
  
  
  METHODS
  Genes in abstracts of HCC-metastasis literatures were identified. Word frequency analysis, KEGG pathway and PPI network analysis were performed. Then co-occurrence analysis between genes and metastasis-related phenotypes were carried out.
  
  
  CONCLUSIONS
  Text mining is effective for revealing potential regulators or pathways, but the purpose of it should be specific, and the combination of various methods will be more useful.
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Zhen
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Caizhong
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Haoyang
authors.initials: H
authors.lastname: Chen
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Yiru
authors.initials: Y
authors.lastname: Xiong
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Junyuan
authors.initials: J
authors.lastname: Tan
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Chen
authors.affiliation: Beijing 302 Hospital, Beijing, 100039, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Li
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000473:pathology*; D016000:Cluster Analysis; D057225:Data Mining / Q000379:methods*; D020869:Gene Expression Profiling / Q000379:methods; D053263:Gene Regulatory Networks; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology*; D009361:Neoplasm Invasiveness / Q000235:genetics*
keywords: hepatocellular carcinoma; metastasis; text mining