Fig. 1 Diagram of the mechanisms by which lncRNAs promote proliferation and invasion of TNBC cells. LncRNA: long non-coding RNA; TNBC: triple-negative breast cancer; LUCAT1: lung cancer-associated transcript 1; miR: microRNA; DANCR: differentiation antagonizing non-protein coding RNA; RXRA: retinoid X receptor protein α; PI3K: phosphoinositide 3-kinase; AKT: protein kinase B; WEE2-AS1: WEE2-antisense RNA 1; TOB1: transducer of ERBB2.1; mRNA: messenger RNA; POU3F3: POU class 3 homeobox 3.