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MiR-34a suppresses the proliferation and invasion of gastric cancer by modulating PDL1 in the immune microenvironment.

Abstract：

OBJECTIVES:As one of the most serious malignant carcinomas that threaten the life of sufferers constantly, gastric cancer has attracted a lot of interest among researchers. miR-34a, a member of hundreds of microRNAs (miRNAs), has been elucidated to exert a suppressive role in gastric cancer tumorgenesis based on previous extensive studies. Our study was performed with the aim to explore the functional effects of miR-34a and its predictive target programmed death ligand 1 (PDL1) in gastric cancer development. METHODS:We employed reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and Western Blot analysis to investigate the regulatory effect of miR-34a on PDL1 mRNA and the corresponding protein expression. The CCK-8 and colony formation assays were used to validate the influence of the combination of miR-34a and PDL1 on the proliferation of gastric tumor cells. Meanwhile, the migration and invasion of gastric tumor cells were measured using Transwell assay. RESULTS:PDL1 was targeted and negatively modulated by miR-34a. In addition, the re-expression of miR-34a suppressed the proliferation as well as the migration and invasion of gastric tumor cells, whereas PDL1 reduced the aforementioned inhibitory effect. CONCLUSIONS:PDL1 is the downstream gene of miR-34a, which can act as an anti-oncogene in gastric cancer. The miR-34a/PDL1 axis might provide a promising anticancer therapeutic approach for the clinical diagnosis, treatment, and prognosis of gastric cancer.

journal_name

Mol Cell Probes

journal_title

Molecular and cellular probes

authors

Yong H,Fu J,Gao G,Shi H,Zheng D,Zhou X

doi

10.1016/j.mcp.2020.101601

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

101601

eissn

0890-8508

issn

1096-1194

pii

S0890-8508(20)30172-9

journal_volume

53

pub_type

杂志文章

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