Fig. 1.

Up-regulation of circ_0001667 expression in breast cancer tissues was related to the shorten life time. a Relative circ_0001667 expression levels in breast cancer tissues comparing to its expression in normal tissues. N normal tissues, T breast cancer tissues. Circ_0001667 expression was measured by real time RT-PCR. b Data analysis from a. c Circ_0001667 levels in breast cancer was negatively related to breast cancer patients’ life time. d Circ_0001667 expression was higher in breast cancer cell lines than it in breast epithelial cells (MCF-10A). *p < 0.05; **p < 0.01