Integration analysis of long non-coding RNA (lncRNA) role in tumorigenesis of colon adenocarcinoma.

Abstract:

BACKGROUND:Colon adenocarcinoma (COAD) is one of the most common gastrointestinal cancers globally. Molecular aberrations of tumor suppressors and/or oncogenes are the main contributors to tumorigenesis. However, the exact underlying mechanisms of COAD pathogenesis are clearly not known yet. In this regard, there is an urgent need to indicate promising potential diagnostic and prognostic biomarkers in COAD patients. METHODS:In the current study, level 3 RNA-Seq and miR-Seq data and corresponding clinical data of colon adenocarcinoma (COAD) were retrieved from the TCGA database. The "limma" package in R software was utilized to indicate the differentially expressed genes. For in silico functional analysis, GO and KEGG signaling pathways were conducted. PPI network was constructed based on the STRING online database by Cytoscape 3.7.2. A ceRNA network was also constructed by "GDCRNATools" package in R software. Kaplan-Meier survival analysis (log-rank test) and ROC curve analysis were used to indicate the diagnostic and prognostic values of the biomarkers. RESULTS:The differential expression data demonstrated that 2995 mRNAs, 205 lncRNAs, and 345 miRNAs were differentially expressed in COAD. The GO and KEGG pathway analysis indicated that the differentially expressed mRNAs were primarily enriched in canonical processes in cancer. The PPI network showed that the CDKN2A, CCND1, MYC, E2F, CDK4, BRCA2, CDC25B, and CDKN1A proteins were the critical hubs. In addition, the Kaplan-Meier analysis revealed that 215 mRNAs, 14 lncRNAs, and 39 miRNAs were associated with overall survival time in the patients. Also, the ceRNA network data demonstrated that three lncRNAs including MIR17HG, H19, SNHG1, KCNQ1OT1, MALAT1, GAS5, SNHG20, OR2A1-AS1, and MAGI2-AS3 genes were involved in the development of COAD. CONCLUSIONS:Our data suggested several promising lncRNAs in the diagnosis and prognosis of patients with COAD.

journal_name

BMC Med Genomics

journal_title

BMC medical genomics

authors

Poursheikhani A,Abbaszadegan MR,Nokhandani N,Kerachian MA

doi

10.1186/s12920-020-00757-2

subject

Has Abstract

pub_date

2020-07-29 00:00:00

pages

108

issue

1

issn

1755-8794

pii

10.1186/s12920-020-00757-2

journal_volume

13

pub_type

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