Abstract
Purpose
Long noncoding RNAs (lncRNAs) play critical roles in diverse biological processes such as tumorigenesis and metastasis. Taurine upregulated gene 1 (TUG1) is a cancer-related lncRNA that is associated with chromatin-modifying complexes and plays an important role in gene regulation. In this study, we determined the expression patterns of TUG1 in esophageal squamous cell carcinoma (ESCC) and evaluated its clinical significance.
Methods
The expression level of TUG1 was examined in 218 pairs of ESCC and adjacent non-cancerous tissues by using quantitative real-time polymerase chain reaction. The relationship between TUG1 expression and clinical features and prognosis was statistically analyzed.
Results
The expression level of TUG1 was significantly upregulated in ESCC tissues compared with paired adjacent normal tissues. High TUG1 expression was significantly correlated with chemotherapy resistance. Survival analysis showed that patients with high TUG1 expression had poor prognosis, especially for cases with well and moderate differentiation, ulcerative type, smaller size, and chemotherapy-sensitive tumors.
Conclusions
Our findings suggest that elevated TUG1 expression is related to chemotherapy resistance and may help predict a poor prognostic outcome of ESCC. TUG1 may provide a potential therapeutic target for ESCC.
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Acknowledgments
This study was supported by Taizhou Society Development Project, Jiangsu, China (Grant No. TS201532); the 333 Project of Scientific Research Project Foundation, Jiangsu, China (Grant No. BRA2015224); and the 12th five-year plan Key Project of Science and Technology, China (Grant No. 2013ZX10002007).
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Lin Jiang and Wenchao Wang have contributed equally to this work.
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Jiang, L., Wang, W., Li, G. et al. High TUG1 expression is associated with chemotherapy resistance and poor prognosis in esophageal squamous cell carcinoma. Cancer Chemother Pharmacol 78, 333–339 (2016). https://doi.org/10.1007/s00280-016-3066-y
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DOI: https://doi.org/10.1007/s00280-016-3066-y