We used MDAMB231 and HCC1937 as the TNBC lines and MCF7 as the luminal breast cancer cells in investigating the effects of SNRPD1 and SNRPE on cancer cell proliferation, apoptosis, migration and drug sensitivity; however, cells representative of other breast cancer subtypes such as HER2-positive tumors were not included. Here, ERBB2 is linked to breast cancer.