As the relative expression level of the assumed target gene NTRK2 was verified in the circ_6014-silenced MDA-MB-231 cells, we further determined that in another BC cell line, MCF-7, the results indicated that NTRK2 was apparently decreased (Figure 5A) (Student’s t test, p < 0.05). The gene discussed is NTRK2; the disease is breast cancer.