title: More expressions of BDNF and TrkB in multiple hepatocellular carcinoma and anti-BDNF or K252a induced apoptosis, supressed invasion of HepG2 and HCCLM3 cells.
abstract: BACKGROUND
  Brain-derived neurotrophic factor (BDNF) and its receptor Tropomysin-related kinase B (TrkB) are commonly up-regulated in a variety of human tumors. However, the roles of BDNF/TrkB in hepatocellular carcinoma (HCC) have been poorly investigated.
  
  
  METHODS
  We evaluated the expressions of BDNF and TrkB in 65 cases of HCC by immunohistochemical staining. Moreover, in human HCC cell lines of HepG2 and high metastatic HCCLM3, the secretory BDNF in supernatant was measured by ELISA, the effects of BDNF neutralizing antibody or Trk tyrosine kinase inhibitor K252a on apoptosis and invasion were examined by flow cytometry and transwell assay respectively.
  
  
  RESULTS
  Higher expression of BDNF (63.1%) or positive expression of TrkB (55.4%) was found in HCC specimens, which was significantly correlated with multiple and advanced stage of HCC. BDNF secretory level in HCCLM3 was higher than that in HepG2 cells. Both anti-BDNF and K252a effectively induced apoptosis and suppressed invasion of HepG2 and HCCLM3 cells.
  
  
  CONCLUSIONS
  These findings suggested that BDNF/TrkB are essential for HCC cells survival and invasion. BDNF/TrkB signaling should probably be an effective target to prevent HCC advancement.
authors: Department of General Surgery, the Fourth Affiliated Hospital of China Medical University, Shenyang, China.
authors: Dawei
authors: D
authors: Guo
authors: Xuezhong
authors: X
authors: Hou
authors: Hongbin
authors: H
authors: Zhang
authors: Wenyu
authors: W
authors: Sun
authors: Lei
authors: L
authors: Zhu
authors: Jian
authors: J
authors: Liang
authors: Xiaofeng
authors: X
authors: Jiang
mesh_terms: D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D017209:Apoptosis; D019208:Brain-Derived Neurotrophic Factor / Q000037:antagonists & inhibitors / Q000276:immunology / Q000378:metabolism*; D006528:Carcinoma, Hepatocellular / Q000378:metabolism* / Q000473:pathology* / Q000517:prevention & control; D002465:Cell Movement; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007124:Immunoenzyme Techniques; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control; D008207:Lymphatic Metastasis; D009361:Neoplasm Invasiveness; D020813:Receptor, trkB / Q000378:metabolism*; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D019208:Brain-Derived Neurotrophic Factor; D020813:Receptor, trkB