EZH2 promotes migration and invasion of triple-negative breast cancer cells via regulating TIMP2-MMP-2/-9 pathway.

Triple-negative breast cancer (TNBC) has a higher potential for invasion and metastasis than other types of breast cancer. Enhancer of zeste homolog 2 (EZH2) is the catalytic core protein in the polycomb repressive complex 2 (PRC2), which catalyzes the trimethylation of histone H3 at lysine 27 (H3K27me3) and mediates gene silencing of the target genes that are involved in fundamental cellular processes, such as the cell fate decision, cell cycle regulation, senescence, cell differentiation, and cancer formation. A consistent association between TNBC metastasis and EZH2 has not been confirmed.