Anti-Proliferative and Apoptosis-Promoting Effect of MicroRNA-125b on Pancreatic Cancer by Targeting NEDD9 Via PI3K/AKT Signaling

Overview

Journal Cancer Manag Res

Publisher Dove Medical Press

Specialty Oncology

Date 2020 Sep 9

PMID 32903925

Citations 8

Authors

Yuzheng Xue

Yao Zhong

Tielong Wu

Yingyue Sheng

Yuanyuan Dai

Lingling Xu

Chuanqing Bao

Affiliations

Soon will be listed here.

Abstract

Purpose: The expression of microRNA-125b (miR-125b) is low in a variety of cancers, including gastric, lung, bladder, thyroid, and esophageal cancers. However, its specific mechanism in pancreatic ductal adenocarcinoma (PDAC) remains unclear. This study is aimed to explore the role of miR-125b in PDAC.

Methods: PDAC tissues and adjacent tissues were collected for miR-125b analysis by qRT-PCR. Different PDAC cell lines were cultured for miR-125b detection by qRT-PCR, and CAPAN1 cells were selected for the downstream experiments. Cell proliferation was characterized by methyl thiazolyl tetrazolium (MTT) and 5-bromo-2-deoxyUridine (BrdU) staining. Flow cytometry was utilized for apoptosis and cell cycle changes. Cell invasion was determined by the Transwell assay and the dual-luciferase assay was utilized for validating the target gene. Western blotting was used to detect apoptosis related and PI3K/AKT signaling proteins.

Results: miR-125b was significantly down-regulated in human PDAC tissues and cell lines ( < 0.05). miR-125b inhibited the growth and invasion of CAPAN1 cells, facilitated apoptosis, and blocked the cell cycle at the G0/G1 phase. Furthermore, miR-125 directly targeted NEDD9. The high expression of NEDD9 impaired the anti-proliferative and anti-apoptotic activity of miR-125b. miR-125b also inhibited apoptosis-related proteins and PI3K/AKT signaling pathways via NEDD9.

Conclusion: miR-125b decreased cell growth and invasion, and facilitated apoptosis in CAPAN1 cells through PI3K/AKT inhibition via targeting NEDD9.

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