MiR‐219a‐5p has been reported as a tumor suppressing miRNA for many cancers.17, 19, 20 We found miR‐219a‐5p expression is downregulated in TNBC cells, and overexpression of miR‐219a‐5p could inhibit both HCP5 and BIRC3 mRNA level. Here, BIRC3 is linked to neoplasm.