Open Access

Identification of the key miRNAs associated with survival time in stomach adenocarcinoma

  • Authors:
    • Li Liang
    • Lingling Zhang
    • Dejun Cui
    • Daping Yang
  • View Affiliations

  • Published online on: August 23, 2017     https://doi.org/10.3892/ol.2017.6792
  • Pages: 4563-4572
  • Copyright: © Liang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Stomach adenocarcinoma (STAD) is one of the leading causes of cancer morbidity and mortality worldwide. The present study aimed to identify the microRNAs associated with STAD survival time. The clinical information and microarray miRNA and mRNA expression profiles of STAD patients were downloaded from The Cancer Genome Atlas. Differential expression (DE) analysis was performed to identify DEmiRNAs and DEmRNAs in STAD. The DEmiRNAs associated with the survival time of patients with STAD were identified through DE analysis, negative correlation pair analysis, miRNA target gene prediction, univariate Cox regression analysis and Kaplan‑Meier analysis. The functions of the target genes of the DEmiRNAs were predicted with Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis. A total of 355 DEmiRNAs and 1,722 DEmRNAs were identified between STAD and normal tissues. A total of 5 DEmiRNAs were identified to be associated with STAD survival, including 4 risk‑associated DEmiRNAs (miR‑30a, ‑143, ‑145 and ‑133b) and 1 protective DEmiRNA (miR‑135b). The target DEmRNAs were significantly enriched for DNA metabolic process in the biological process GO category, and in KEGG cell cycle signaling pathways. Kaplan‑Meier curves indicated that the overall survival time in the miR‑30a, ‑143, ‑145 and ‑133b high expression groups was significantly shorter than that in the low expression groups, whereas the survival time was prolonged in the miR‑135b high expression group compared with that in the low expression group. Therefore, miR‑30a, ‑143, ‑145, ‑133b and ‑135b may be involved in the tumorigenesis and development of STAD, and may be potential biomarkers for its early diagnosis and prognosis.
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October-2017
Volume 14 Issue 4

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Liang L, Zhang L, Cui D and Yang D: Identification of the key miRNAs associated with survival time in stomach adenocarcinoma. Oncol Lett 14: 4563-4572, 2017
APA
Liang, L., Zhang, L., Cui, D., & Yang, D. (2017). Identification of the key miRNAs associated with survival time in stomach adenocarcinoma. Oncology Letters, 14, 4563-4572. https://doi.org/10.3892/ol.2017.6792
MLA
Liang, L., Zhang, L., Cui, D., Yang, D."Identification of the key miRNAs associated with survival time in stomach adenocarcinoma". Oncology Letters 14.4 (2017): 4563-4572.
Chicago
Liang, L., Zhang, L., Cui, D., Yang, D."Identification of the key miRNAs associated with survival time in stomach adenocarcinoma". Oncology Letters 14, no. 4 (2017): 4563-4572. https://doi.org/10.3892/ol.2017.6792