POU5F1 and neoplasm: In this report, following the knockdown of DCLK1 using nanoparticle-encapsulated siRNA (NPsiDCLK1) in tumor xenografted mice, we observed a significant increase in: (A) miR-143/145 cluster, which resulted in downregulation of key pluripotency markers (OCT4, SOX2, KLF4 and NANOG); (B) let-7a, which resulted in decreased pluripotency factor LIN28B; and (C) miR-200a, b and c, which resulted in downregulation of EMT and angiogenic factors.