title: Overexpression of Sirtuin-1 is associated with poor clinical outcome in esophageal squamous cell carcinoma.
abstract: Sirtuin-1 (SIRT1), one member of the mammalian sirtuin family, has been suggested to play an essential role in the development and progression of many tumors. However, the relationship between expression of SIRT1 and prognosis of esophageal cancer is still unknown. This study aimed to investigate SIRT1 expression and its possible prognostic value in esophageal squamous cell carcinoma (ESCC). A total of 86 patients with ESCC were enrolled in our study group. Clinical data and matched tissues were collected. Western blotting and real-time quantitative reverse transcription PCR (RT-PCR) were carried out to explore the expression of SIRT1 in four human ESCC cell lines, one human normal epithelial cell line, and clinical ESCC tissues. Expression levels of SIRT1 protein in tissues of specimens were detected by immunohistochemistry (IHC). Survival analysis was carried out using the Kaplan-Meier method. Univariate and multivariate Cox regression analyses were performed to evaluate the correlation of SIRT1 expression with clinical features and prognosis of ESCC patients. Basal expression levels of SIRT1 protein in ESCC tumor tissues and cell lines were higher than those in the control groups. IHC analysis showed that expression levels of SIRT1 protein significantly correlated with TNM stage and lymph node status of ESCC patients. Moreover, upregulated SIRT1 expression was associated with poor clinical prognosis. High SIRT1 expression in ESCC could serve as an independent predictive biomarker for diagnosis and prognosis in ESCC patients.
authors.affiliation: Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China.
authors.forename: Zhenyue
authors.initials: Z
authors.lastname: He
authors.affiliation: Department of Cardiothoracic Surgery, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Yi
authors.affiliation: Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Jin
authors.affiliation: Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China.
authors.forename: Banzhou
authors.initials: B
authors.lastname: Pan
authors.affiliation: Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China. chenlongbang@yeah.net.
authors.forename: Longbang
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, 305 Zhongshan East Road, Nanjing, Jiangsu, 210002, People's Republic of China. songhaizhu@163.com.
authors.forename: Haizhu
authors.initials: H
authors.lastname: Song
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism*; D015153:Blotting, Western; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000378:metabolism / Q000556:secondary*; D016022:Case-Control Studies; D004938:Esophageal Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007124:Immunoenzyme Techniques; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D060787:Neoplasm Grading; D009367:Neoplasm Staging; D011379:Prognosis; D012333:RNA, Messenger / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D056564:Sirtuin 1 / Q000235:genetics / Q000378:metabolism*; D015996:Survival Rate; D014407:Tumor Cells, Cultured
chemical_list: D014408:Biomarkers, Tumor; D012333:RNA, Messenger; C447939:SIRT1 protein, human; D056564:Sirtuin 1
keywords: Esophageal squamous cell carcinoma; Overall survival; Prognostic factor; SIRT1