Long noncoding RNA TP53TG1 promotes pancreatic ductal adenocarcinoma development by acting as a molecular sponge of microRNA‐96. Issue 9 (7th August 2019)

• Record Type: Journal Article
• Authors: Zhang, Yufeng; Yang, Haiyan; Du, Yong; Liu, Pingping; Zhang, Jing; Li, Yue; Shen, Haitao; Xing, Lingxiao; Xue, Xiaoying; Chen, Jie; Zhang, Xianghong
• Is Part Of: Cancer science. Volume 110:Issue 9(2019)
• Page Start: 2760
• Page End: 2772
• Publication Date: 2019-08-07
• Subjects: ceRNA -- KRAS -- lncRNA TP53TG1 -- miR‐96 -- pancreatic ductal adenocarcinoma; Cancer -- Periodicals; Neoplasms -- Periodicals; Research -- Periodicals; Electronic journals; 616.994005
• DOI: 10.1111/cas.14136
• Languages: English
• ISSNs: 1347-9032

Abstract

Abstract: Long noncoding RNAs (lncRNAs) are emerging as key regulators in cancer initiation and progression. TP53TG1 is a recently identified lncRNA and several studies have shown that TP53TG1 may play the role of tumor suppressor gene or oncogene in different tumors. Nevertheless, the involvement of TP53TG1 in carcinogenesis of pancreatic ductal adenocarcinoma (PDAC) has not been characterized. In our studies, we identified that TP53TG1 was highly expressed in PDAC and was a novel regulator of PDAC development. Knockdown of TP53TG1 inhibited proliferation, induced apoptosis, and decreased migration and invasion in PDAC cells, whereas enhanced expression of TP53TG1 had the opposite effects. Mechanistically, TP53TG1 could directly bind to microRNA (miR)‐96 and effectively function as a sponge for miR‐96, thus antagonizing the functions of miR‐96 and leading to derepression of its endogenous target KRAS, which is a core oncogene in the initiation and maintenance of PDAC. Taken together, these observations imply that TP53TG1 contributes to the growth and progression of PDAC by acting as a competing endogenous RNA (ceRNA) to competitively bind to miR‐96 and regulate KRAS expression, which highlights the importance of the complicated miRNA‐lncRNA network in modulating the progression of PDAC. Abstract : TP53TG1 contributes to the growth and progression of PDAC by acting as a competing endogenous RNA to upregulate KRAS expression through competitive combination with miR‐96, which highlights the importance of the complicated miRNA‐lncRNA network in modulating the progression of PDAC.