While some of these spliceosome genes, such as SNRPA1, SNRPD1, USP39, HNRNPU, and HNRNPC, have been shown to play an important role in promoting TNBC cell survival, proliferation, and response to chemotherapy (53–57), others are yet to be studied in breast cancer. This evidence concerns the gene SNRPD1 and breast carcinoma.