Up-regulated expression of COL10A1, MMP11, CST1, GJB2, MMP1, MMP13, and CEACAM6; down-regulated expression of ADH1B, CIDEC, THRSP, GPD1, TIMP4, FABP4, and SCARA5 genes was common in breast cancers of the two populations. This evidence concerns the gene MMP1 and breast cancer.