PVT1 and breast cancer: This is the case of exosomal circRNA‐plasmacytoma variant translocation 1 (circ‐PVT1), which downregulates miR‐30a‐5p, intensifying gastric cancer cells cisplatin‐resistance through autophagy modulation,148 while exosomal lncRNA Linc00969, which is overexpressed in trastuzumab‐resistant patients with breast cancer, can disseminate drug resistance by inducing autophagy.149