Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13578-018-0260-0/MediaObjects/13578_2018_260_Fig1_HTML.png)
TUG1 was up-regulated in DDP-resistant ESCC tissues and cell lines. qRT-PCR analysis indicated the TUG1 expression levels in ESCC tumor or normal tissues from TCGA dataset (a), ESCC tumor or adjacent normal tissues (n = 42) (b), DDP-sensitive or DDP-resistant ESCC tissues (c), and DDP-resistant ESCC cell lines (ECA109/DDP and EC9706/DDP) and their parental cells (ECA109 and EC9706) or normal immortalized esophageal epithelial cell line HET-1A (d, e). f The overall survival was evaluated by Kaplan–Meier curve between low and high TUG1 expression groups. *P < 0.05