In addition to PDGF-D, PDGF-B not only contributes to EMT in gastric cancer cells by activating MAPK/ERK pathway [69], but also promotes the expression of zinc finger E-box binding homeobox 1 (ZEB1) by downregulating the expression of miR-200 in triple negative breast cancer [70]. Here, ZEB1 is linked to triple-negative breast carcinoma.