EPHA3 and breast cancer: Moreover, in the top-10 most abundant circRNAs list for docetaxel-sensitive cell lines, we found that two highly abundant circRNAs, circEPHA3.1 and circEPHA3.2, were specifically expressed in docetaxel-sensitive MCF-7 breast cancer cells, and the expression of these two circRNAs was positively correlated with the linear transcripts of EPHA3 gene (Figure 2D).