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Pubmed ID :26041879
Publication Date : //

Sp1-driven up-regulation of miR-19a decreases RHOB and promotes pancreatic cancer.


Cancer treatment alters microRNA (miRNA) expression, revealing potential therapeutic targets (oncotarget). Here we treated pancreatic cancer (ASPC-1) cells with either recombinant human endostatin (rh-endostatin) or gemcitabine. Then high-throughput sequencing assay was performed to screen for altered miRNAs. Both treatments decreased levels of MiR-19a. We found that miR-19a stimulated cell proliferation, migration, invasion in vitro and tumor growth in vivo. High levels of miR-19a correlated with poor prognosis in patients. Ras homolog family member B (RHOB) was identified as a direct target of miR-19a. Furthermore, RHOB was down-regulated in human pancreatic cancer samples. Restoration of RHOB induced apoptosis, inhibited proliferation and migration of ASPC-1 cells. SP-1 was identified as an upstream transcription factor of miR-19a gene, promoting miR-19a transcription. Rh-endostatin decreased miR-19a expression by down-regulating SP-1. These findings suggest that miR-19a is a potential therapeutic target in pancreatic cancer.

Authors : Tan Yonggang , Yin Hongzhuan , Zhang Heying , Fang Jun , Zheng Wei , Li Dan , Li Yue , Cao Wei , Sun Cheng , Liang Yusi , Zeng Juan , Zou Huawei , Fu Weineng , Yang Xianghong ,

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