Open Access

Screening of differentially expressed genes and identification of NUF2 as a prognostic marker in breast cancer

  • Authors:
    • Wenjie Xu
    • Yizhen Wang
    • Yanan Wang
    • Shanmei Lv
    • Xiuping Xu
    • Xuejun Dong
  • View Affiliations

  • Published online on: June 11, 2019     https://doi.org/10.3892/ijmm.2019.4239
  • Pages: 390-404
  • Copyright: © Xu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aims of the present study were to screen differentially expressed genes (DEGs) in breast cancer (BC) and investigate NDC80 kinetochore complex component (NUF2) as a prognostic marker of BC in detail. A total of four BC microarray datasets, downloaded from the Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA) databases, were used to screen DEGs. A total of 190 DEGs with the same expression trends were identified in the 4 datasets, including 65 upregulated and 125 downregulated DEGs. Functional and pathway enrichment analyses were performed using the Database for Annotation, Visualization and Integrated Discovery. The upregulated DEGs were enriched for 10 Gene Ontology (GO) terms and 7 pathways, and the downregulated DEGs were enriched for 10 GO terms and 10 pathways. A protein‑protein interaction network containing 149 nodes and 930 edges was constructed using the Search Tool for the Retrieval of Interacting Genes, and 2 functional modules were identified using the MCODE plugin of Cytoscape. Based on an in‑depth analysis of module 1 and literature mining, NUF2 was selected for further research. Oncomine database analysis and reverse transcription‑quantitative PCR showed that NUF2 is significantly upregulated in BC tissues. In analyses of correlations between NUF2 and clinical pathological characteristics, NUF2 was significantly associated with the malignant features of BC. Using 5 additional datasets from GEO, it was demonstrated that NUF2 has a significant prognostic role in both ER‑positive and ER‑negative BC. A Gene Set Enrichment Analysis indicated that NUF2 may regulate breast carcinogenesis and progression via cell cycle‑related pathways. The results of the present study demonstrated that NUF2 is overexpressed in BC and is significantly associated with its multiple pathological features and prognosis.
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August-2019
Volume 44 Issue 2

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Copy and paste a formatted citation
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Spandidos Publications style
Xu W, Wang Y, Wang Y, Lv S, Xu X and Dong X: Screening of differentially expressed genes and identification of NUF2 as a prognostic marker in breast cancer. Int J Mol Med 44: 390-404, 2019
APA
Xu, W., Wang, Y., Wang, Y., Lv, S., Xu, X., & Dong, X. (2019). Screening of differentially expressed genes and identification of NUF2 as a prognostic marker in breast cancer. International Journal of Molecular Medicine, 44, 390-404. https://doi.org/10.3892/ijmm.2019.4239
MLA
Xu, W., Wang, Y., Wang, Y., Lv, S., Xu, X., Dong, X."Screening of differentially expressed genes and identification of NUF2 as a prognostic marker in breast cancer". International Journal of Molecular Medicine 44.2 (2019): 390-404.
Chicago
Xu, W., Wang, Y., Wang, Y., Lv, S., Xu, X., Dong, X."Screening of differentially expressed genes and identification of NUF2 as a prognostic marker in breast cancer". International Journal of Molecular Medicine 44, no. 2 (2019): 390-404. https://doi.org/10.3892/ijmm.2019.4239