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07 October 2019 : Laboratory Research  

miRNA-339-5p Plays an Important Role in Invasion and Migration of Pancreatic Cancer Cells

Zeqian Yu12ABFG*, Susu Zhao3BC, Lishan Wang42CD, Junying Wang5EF, Jiahua Zhou42DF

DOI: 10.12659/MSM.917038

Med Sci Monit 2019; 25:7509-7517

Abstract

BACKGROUND: This study aimed to investigate the role of miRNA-339-5p in pancreatic cancer cell invasion and migration.

MATERIAL AND METHODS: The differences between exosomal miRNAs of PANC02 and PANC02-H7 were studied by microarray analysis. We measured miRNA-339-5p expression in different groups; differences in cell invasion and migration were evaluated using the Transwell and wound healing assays and expression of relative proteins (E-cadherin, vimentin and ZNF689) was measured by WB assay. The correlation between miRNA-339-5p and ZNF689 expression was evaluated by luciferase reporter gene assay.

RESULTS: Compared with PANC02 exosome, microarray analysis indicated that miRNA-339-5p mRNA expression was significantly suppressed (P<0.001) in the PANC02-H7 exosome. Supplementation with miR-339-5p mimics led to a significant decrease in the invasion cell number and wound healing rate (P<0.001), with significantly enhanced E-cadherin expression and suppressed vimentin expression (P<0.001). However, transfection of a miR-339-5p inhibitor led to a significant increase in the invasion cell number and wound healing rate (P<0.001), with significantly suppressed E-cadherin expression and increased vimentin expression (P<0.001). Luciferase reporter gene assay demonstrated ZNF689 gene to be the target of miR-339-5p in the PANC02-H7 cell. With miR-339-5p and ZNF689 transfection, the invasion cell number and wound healing rate were significantly increased compared with those in the miR-339-5p group (P<0.001), with significantly increased expression of ZNF689 and vimentin and suppressed E-cadherin expression (P<0.001).

CONCLUSIONS: miR-339-5p suppresses the invasion and migration of pancreatic cancer cells via direct regulation of ZNF689 in vitro.

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750