LYPLAL1 and neoplasm: The influence of LYPLAL1-DT on the tumor growth and metastasis of TNBC cells in vivo was further ascertained by models of xenograft tumor and lung metastasis established in nude mice using BT-549 and MDA-MB-231 cells stably overexpressing LYPLAL1DT (LYPLAL1-DT group) or stably transfecting the empty vector (Vector group).