Lysine-specific demethylase 1 promotes tumorigenesis and predicts prognosis in gallbladder cancer
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Shixian Lian1,*, Yebo Shao1,*, Houbao Liu1,*, Junyi He1,*, Weiqi Lu1, Yong Zhang1, Ying Jiang1, Jun Zhu1
1Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
*These authors have contributed equally to this work
Jun Zhu, e-mail: [email protected]
Keywords: lysine-specific demethylase 1, C-myc, invasion and migration and proliferation, prognosis, gallbladder cancer
Received: May 21, 2015 Accepted: September 28, 2015 Published: October 09, 2015
Gallbladder Cancer (GBC), characterized by invasive growth and infiltrative dissemination, is difficult to diagnose and has poor prognosis. Emerging evidence demonstrates that Lysine-Specific Demethylase 1 (LSD1) has important roles in carcinogenesis, proliferation and metastasis. We studied the roles and molecular mechanisms of LSD1 in GBC. We examined LSD1 expression in 109 paired samples of GBC and normal gallbladder tissues. We found GBC tissues had upregulated LSD1 compared with normal gallbladder tissues (P = 0.003), and its high expression was associated with tumor-node-metastasis stage (P < 0.0001), Nevin’s stage (P = 0.0093) and distant metastases (P = 0.0070). We found positive correlations between LSD1 expression and other proteins: epithelial–mesenchymal transition markers, C-myc and cyclin-related proteins. Inhibiting LSD1 expression in vitro impaired the proliferation and invasiveness of GBC cells and also downregulated c-myc expression and consequently inhibited GBC cell proliferation. LSD1 overexpression promotes GBC development and may be a predictor for a worsened prognosis. LSD1 may be a novel therapeutic target and prognostic tool for gallbladder cancer.
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