Integrated bioinformatics analysis revealing independent prognostic long non‑coding RNAs DNAH17‑AS1 and RP11‑400N13.2 and their potential oncogenic roles in colorectal cancer

Zhou,Wen; Pan,Boyu; Liu,Liren

doi:10.3892/ol.2019.10730

Integrated bioinformatics analysis revealing independent prognostic long non‑coding RNAs DNAH17‑AS1 and RP11‑400N13.2 and their potential oncogenic roles in colorectal cancer

Authors:
- Wen Zhou
- Boyu Pan
- Liren Liu
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Affiliations: Clinical Laboratory, Tianjin Hospital, Tianjin 300211, P.R. China, Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, P.R. China
Published online on: August 7, 2019 https://doi.org/10.3892/ol.2019.10730
Pages: 3705-3715
Copyright: © Zhou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aberrant expression of long non‑coding RNAs (lncRNAs) has been associated with a variety of malignancies, including colorectal cancer (CRC); however, the key lncRNAs associated with patient prognosis and their biological roles in CRC are yet to be determined. The aim of the present study was to determine the key lncRNAs associated with patient prognosis as well as their biological roles in CRC. Therefore, a dataset from The Cancer Genome Atlas containing the lncRNA expression data of 521 CRC and normal colorectal mucosal tissues, as well as the corresponding clinical data, were screened. A total of 1,180 significantly differentially expressed lncRNAs were associated with CRC as determined by t‑tests in edgeR. Kaplan‑Meier analysis revealed that 56 of the 1,180 lncRNAs were associated with overall survival (OS); 7 of the 56 lncRNAs were identified as key lncRNAs associated with the Tumor‑Node‑Metastasis stage of CRC by Kruskal‑Wallis test. Subsequent univariate and multivariate Cox regression analyses of the 7 lncRNAs revealed 2 lncRNAs, DNAH17‑AS1 and RP11‑400N13.2, as potential independent prognostic factors for the OS of patients with CRC. Furthermore, the expression levelsof these 2 lncRNAs were significantly upregulated in CRC compared with those in normal tissues, which suggested that they may serve an oncogenic role in CRC. In addition, networks comprising the 2 lncRNAs and their respective co‑expressed protein‑coding genes (PCGs) were constructed using cor.test in R. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses of these PCGs were conducted; DNAH17‑AS1‑ and RP11‑400N13.2‑associated PCGs were reported to be involved in G‑protein coupling‑related functions. Thus, these independent prognostic lncRNAs and their associated functions identified in the present study may provide novel insight into potential prognostic biomarkers and therapeutic targets for the treatment of CRC.

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