title: Overexpression of LSD1 in hepatocellular carcinoma: a latent target for the diagnosis and therapy of hepatoma.
abstract: The aim of this study was to investigate the expression of LSD1 in human hepatocellular carcinoma (HCC) cell lines and HCC samples. In this study, we examined LSD1 expression in 60 paired liver cancer tissues and adjacent noncancerous tissues by Western blot. In addition, we analyzed LSD1 expression in 198 HCC samples by immunohistochemistry. The relationship between LSD1 expression and clinicopathological features was investigated. The HCC cell line SMMC-7721 was transfected with LSD1 siRNA expressing plasmids. We subsequently examined in vitro cell growth using the MTT assay and anchorage-independent growth through a soft-agar colony-formation assay. In addition, the expression levels of Bcl-2 and c-Myc were also examined. Immunohistochemistry and Western blotting consistently confirmed LSD1 overexpression in HCC tissues compared with adjacent non-neoplastic tissues (P < 0.01). Additionally, immunostaining showed more LSD1-positive cells in the higher tumor stage (T3-4) and tumor grade (G3) than in the lower tumor stage (T1-2, P < 0.001) and tumor grade (G1-2, P < 0.001). Knockdown of LSD1 expression in HCC cells led to decreased cell proliferation. The expression of Bcl-2 and c-Myc were down-regulated after transfection of LSD1 siRNA into HCC cell line SMMC-7721. In conclusion, because LSD1 was overexpressed in HCC and has an important role in the development of HCC, LSD1 could be a latent target in the diagnosis and therapy of HCC.
authors.affiliation: Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University, No. 1165, Kongjiang Rd, Shanghai, 200092, China.
authors.forename: Ze-Kun
authors.initials: ZK
authors.lastname: Zhao
authors.forename: Ping
authors.initials: P
authors.lastname: Dong
authors.forename: Jun
authors.initials: J
authors.lastname: Gu
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Zhuang
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Lu
authors.forename: Dao-Rong
authors.initials: DR
authors.lastname: Wang
authors.forename: Ying-Bin
authors.initials: YB
authors.lastname: Liu
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000175:diagnosis / Q000188:drug therapy / Q000378:metabolism*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D015536:Down-Regulation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D056466:Histone Demethylases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D008099:Liver / Q000378:metabolism / Q000473:pathology; D008113:Liver Neoplasms / Q000175:diagnosis / Q000188:drug therapy / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism; D034622:RNA Interference; D034741:RNA, Small Interfering
chemical_list: C489427:MYC protein, human; D019253:Proto-Oncogene Proteins c-bcl-2; D016271:Proto-Oncogene Proteins c-myc; D034741:RNA, Small Interfering; D056466:Histone Demethylases; C495195:KDM1A protein, human