The underlying mechanism of the noticed upregulation of FAM171A1 in TNBC cells includes reduced levels of miR590-5p in TNBC cells, which otherwise targets FAM171A1 in ERα-positive breast cancer cells, and thus the loss of miR590-5p regulates FAM171A1 in TNBC cells. This evidence concerns the gene FAM171A1 and breast carcinoma.