PABPN1 and breast cancer: To further explore the function of PABPN1 in BC progression, we created stable PABPN1-overexpressing (PABPN1) and -knockdown (PABPN1-Sh#1 and PABPN1-Sh#2) cell lines using EJ and UM-UC-3 BC cells (Fig. 2A).