Long noncoding RNA KTN1 antisense RNA 1exerts an oncogenic function in lung adenocarcinoma by regulating DEP domain containing 1 expression via activating epithelial-mesenchymal transition.

Abstract:

:Long noncoding RNA (lncRNA) KTN1 antisense RNA 1 (KTN1-AS1) is a novel promoter in the progression of some cancers. However, the knowledge of its role in lung adenocarcinoma is still limited. The current study aimed to examine the biological functions of KTN1-AS1 and its coexpressed protein in lung adenocarcinoma. The RNA sequencing expression profiles from The Cancer Genome Atlas (TCGA) database were downloaded to evaluate the expression of KTN1-AS1 and its coexpressed protein, as well as assess their prognostic values. The correlation between DEP domain containing 1 (DEPDC1) and KTN1-AS1 levels was verified using Pearson's correlation coefficient. Real-time qPCR and western blot were adopted to determine the mRNA and protein levels of the corresponding molecules. Cell viability, invasiveness and motility were assayed by cell counting kit-8, clone formation and Transwell assays, appropriately. High levels of KTN1-AS1 were observed and led to a poorer prognosis in lung adenocarcinoma patients, according to the public dataset. DEPDC1 was found to be a downstream protein associated with KTN1-AS1. Moreover, DEPDC1 was also upregulated in lung adenocarcinoma tissues and can be seen as an independent prognosticator for patients with lung adenocarcinoma. Besides, DEPDC1 expression was positively correlated with KTN1-AS1 expression, which was verified by real-time qPCR and western blot. Functional experiments indicated that KTN1-AS1-knockdown inhibited cells proliferation, migration and invasion, whereas DEPDC1-overexpression could diminish this inhibition. Conversely, overexpression of KTN1-AS1 presented a promoting effect on these phenotypes, whereas silencing DEPDC1 could reduce these accelerations. Further evidence supported that KTN1-AS1/DEPDC1 plays the carcinogenic role by activating the epithelial-mesenchymal transition process and elevating MMP9 expression in lung adenocarcinoma cells. These data suggested that the KTN1-AS1/DEPDC1 axis may involve in the tumorigenesis in lung adenocarcinoma by activating the epithelial-mesenchymal transition process.

journal_name

Anticancer Drugs

journal_title

Anti-cancer drugs

authors

Li YY,Li W,Chang GZ,Li YM

doi

10.1097/CAD.0000000000001035

subject

Has Abstract

pub_date

2021-01-22 00:00:00

eissn

0959-4973

issn

1473-5741

pii

00001813-900000000-98465

pub_type

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