To investigate the relationship between the expression of miR‐34b/c‐5p and NK1R and the clinicopathological parameters of breast cancer, the expression levels of miR‐34b/c‐5p, NK1R‐FL and NK1R‐Tr were examined by qRT‐PCR in 50 paired samples of breast cancer and matched adjacent nontumour tissues. Here, TACR1 is linked to breast cancer.