The expression levels of miR‐34, NK1R‐FL and NK1R‐Tr were detected in different breast cancer cell lines, including MDA‐MB‐231, MCF‐7, T47D, SK‐BR‐3 and the nontumorigenic mammary epithelial cell line HBL‐100 (Figure 1A,B). The gene discussed is TACR1; the disease is breast cancer.