In both clinical PC specimens and pancreatic ductal adenocarcinoma cell lines, high levels of consistent lncRNA THAP9-AS1 expression were observed, which competitively inhibited the negative regulatory effect of miR-484 on YAP and thus accelerated the proliferation of pancreatic ductal adenocarcinoma cells (30). Here, THAP9 is linked to pancreatic ductal adenocarcinoma.