Open Access

Expression and potential molecular mechanisms of miR‑204‑5p in breast cancer, based on bioinformatics and a meta‑analysis of 2,306 cases

  • Authors:
    • Kai‑Teng Cai
    • An‑Gui Liu
    • Ze‑Feng Wang
    • Hang‑Wei Jiang
    • Jing‑Jing Zeng
    • Rong‑Quan He
    • Jie Ma
    • Gang Chen
    • Jin‑Cai Zhong
  • View Affiliations

  • Published online on: December 14, 2018     https://doi.org/10.3892/mmr.2018.9764
  • Pages: 1168-1184
  • Copyright: © Cai et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Breast cancer (BC) is the most common cancer among women worldwide. However, there is insufficient research that focuses on the expression and molecular mechanisms of microRNA (miR)‑204‑5p in BC. In the current study, data were downloaded from the Cancer Genome Atlas (TCGA), the Gene Expression Omnibus (GEO) and the University of California Santa Cruz (UCSC) Xena databases. They were then used to undertake a meta‑analysis that leveraged the standard mean difference (SMD) and summarized receiver operating characteristic (sROC) to evaluate the expression of the precursor miR‑204 and mature miR‑204‑5p in BC. Additionally, an intersection of predicted genes, differentially expressed genes (DEGs) from the TCGA database and the GEO database were plotted to acquire desirable putative genes. Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and protein‑protein interaction (PPI) network analyses were performed to assess the potential pathways and hub genes of miR‑204‑5p in BC. A decreased trend in precursor miR‑204 expression was detected in 1,077 BC tissue samples in comparison to 104 para‑carcinoma tissue samples in the TCGA database. Further, the expression of mature miR‑204‑5p was markedly downregulated in 756 BC tissue samples in comparison to 76 para‑carcinoma tissue samples in the UCSC Xena database. The outcome of the SMD from meta‑analysis also indicated that the expression of miR‑204‑5p was markedly reduced in 2,306 BC tissue samples in comparison to 367 para‑carcinoma tissue samples. Additionally, the ROC and sROC values indicated that miR‑204‑5p had a great discriminatory capacity for BC. In GO analysis, ‘cell development’, ‘cell surface activity’, and ‘receptor agonist activity’ were the most enriched terms; in KEGG analysis, ‘endocytosis’ was significantly enriched. Rac GTPase activating protein 1 (RACGAP1) was considered the hub gene in the PPI network. In conclusion, miR‑204‑5p may serve a suppressor role in the oncogenesis and advancement of BC, and miR‑204‑5p may have crucial functions in BC by targeting RACGAP1.
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February-2019
Volume 19 Issue 2

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
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Spandidos Publications style
Cai KT, Liu AG, Wang ZF, Jiang HW, Zeng JJ, He RQ, Ma J, Chen G and Zhong JC: Expression and potential molecular mechanisms of miR‑204‑5p in breast cancer, based on bioinformatics and a meta‑analysis of 2,306 cases. Mol Med Rep 19: 1168-1184, 2019
APA
Cai, K., Liu, A., Wang, Z., Jiang, H., Zeng, J., He, R. ... Zhong, J. (2019). Expression and potential molecular mechanisms of miR‑204‑5p in breast cancer, based on bioinformatics and a meta‑analysis of 2,306 cases. Molecular Medicine Reports, 19, 1168-1184. https://doi.org/10.3892/mmr.2018.9764
MLA
Cai, K., Liu, A., Wang, Z., Jiang, H., Zeng, J., He, R., Ma, J., Chen, G., Zhong, J."Expression and potential molecular mechanisms of miR‑204‑5p in breast cancer, based on bioinformatics and a meta‑analysis of 2,306 cases". Molecular Medicine Reports 19.2 (2019): 1168-1184.
Chicago
Cai, K., Liu, A., Wang, Z., Jiang, H., Zeng, J., He, R., Ma, J., Chen, G., Zhong, J."Expression and potential molecular mechanisms of miR‑204‑5p in breast cancer, based on bioinformatics and a meta‑analysis of 2,306 cases". Molecular Medicine Reports 19, no. 2 (2019): 1168-1184. https://doi.org/10.3892/mmr.2018.9764