TAILIEUCHUNG - báo cáo khoa học: "More expressions of BDNF and TrkB in multiple hepatocellular carcinoma and anti-BDNF or K252a induced apoptosis, supressed invasion of HepG2 and HCCLM3 cells"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: More expressions of BDNF and TrkB in multiple hepatocellular carcinoma and anti-BDNF or K252a induced apoptosis, supressed invasion of HepG2 and HCCLM3 cells | Guo et al. Journal of Experimental Clinical Cancer Research 2011 30 97 http content 30 1 97 Journal of Experimental Clinical Cancer Research RESEARCH Open Access More expressions of BDNF and TrkB in multiple hepatocellular carcinoma and anti-BDNF or K252a induced apoptosis supressed invasion of HepG2 and HCCLM3 cells Dawei Guo1 Xuezhong Hou2 Hongbin Zhang1 Wenyu Sun1 Lei Zhu1 Jian Liang1 and Xiaofeng Jiang1 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 or positive expression of TrkB 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. Background Hepatocellular carcinoma HCC is a leading cause of cancer death worldwide and the presense of intraheptatic metastases at the time of surgery has been regarded as the main causes of recurrence 1 . The cancer cells readily disseminate via portal venous branches and patients with multiple tumor nodules in liver are proved to have poor prognosis 2 . Multiple

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