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Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis

  • Authors:
    • Ligang Bao
    • Ting Guo
    • Ji Wang
    • Kai Zhang
    • Maode Bao
  • View Affiliations / Copyright

    Affiliations: Emergency Department, Dongyang People's Hospital, Jinhua, Zhejiang 322100, P.R. China, Department of Neurosurgery, Zhejiang Province Taizhou Hospital, Taizhou, Zhejiang 318000, P.R. China, Department of Orthopaedics, 967th Hospital of The PLA Joint Logistics Support Force, Dalian, Liaoning 116021, P.R. China, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China, Orthopedics Department, Dongyang Chinese Medicine Hospital, Jinhua, Zhejiang 322100, P.R. China
    Copyright: © Bao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 127-138
    |
    Published online on: November 11, 2019
       https://doi.org/10.3892/ol.2019.11079
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Abstract

Triple‑negative breast cancer (TNBC) is characterized by a deficiency in the estrogen receptor (ER), progesterone receptor (PR) and HER2/neu genes. Patients with TNBC have an increased likelihood of distant recurrence and mortality, compared with patients with other subtypes of breast cancer. The current study aimed to identify novel biomarkers for TNBC. Weighted gene co‑expression network analysis (WGCNA) was applied to construct gene co‑expression networks; these were used to explore the correlation between mRNA profiles and clinical data, thus identifying the most significant co‑expression network associated with the American Joint Committee on Cancer‑TNM stage of TNBC. Using RNAseq datasets from The Cancer Genome Atlas, downloaded from the University of California, Santa Cruz, WGCNA identified 23 modules via K‑means clustering. The most significant module consisted of 248 genes, on which gene ontology analysis was subsequently performed. Differently Expressed Gene (DEG) analysis was then applied to determine the DEGs between normal and tumor tissues. A total of 42 genes were positioned in the overlap between DEGs and the most significant module. Following survival analysis, 5 genes [GIPC PDZ domain containing family member 1 (GIPC1), hes family bHLH transcription factor 6 (HES6), calmodulin‑regulated spectrin‑associated protein family member 3 (KIAA1543), myosin light chain kinase 2 (MYLK2) and peter pan homolog (PPAN)] were selected and their association with the American Joint Committee on Cancer‑TNM diagnostic stage was investigated. The expression level of these genes in different pathological stages varied, but tended to increase in more advanced pathological stages. The expression of these 5 genes exhibited accurate capacity for the identification of tumor and normal tissues via receiver operating characteristic curve analysis. High expression of GIPC1, HES6, KIAA1543, MYLK2 and PPAN resulted in poor overall survival (OS) in patients with TNBC. In conclusion, via unsupervised clustering methods, a co‑expressed gene network with high inter‑connectivity was constructed, and 5 genes were identified as biomarkers for TNBC.
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Copy and paste a formatted citation
Spandidos Publications style
Bao L, Guo T, Wang J, Zhang K and Bao M: Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis. Oncol Lett 19: 127-138, 2020.
APA
Bao, L., Guo, T., Wang, J., Zhang, K., & Bao, M. (2020). Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis. Oncology Letters, 19, 127-138. https://doi.org/10.3892/ol.2019.11079
MLA
Bao, L., Guo, T., Wang, J., Zhang, K., Bao, M."Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis". Oncology Letters 19.1 (2020): 127-138.
Chicago
Bao, L., Guo, T., Wang, J., Zhang, K., Bao, M."Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis". Oncology Letters 19, no. 1 (2020): 127-138. https://doi.org/10.3892/ol.2019.11079
Copy and paste a formatted citation
x
Spandidos Publications style
Bao L, Guo T, Wang J, Zhang K and Bao M: Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis. Oncol Lett 19: 127-138, 2020.
APA
Bao, L., Guo, T., Wang, J., Zhang, K., & Bao, M. (2020). Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis. Oncology Letters, 19, 127-138. https://doi.org/10.3892/ol.2019.11079
MLA
Bao, L., Guo, T., Wang, J., Zhang, K., Bao, M."Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis". Oncology Letters 19.1 (2020): 127-138.
Chicago
Bao, L., Guo, T., Wang, J., Zhang, K., Bao, M."Prognostic genes of triple‑negative breast cancer identified by weighted gene co‑expression network analysis". Oncology Letters 19, no. 1 (2020): 127-138. https://doi.org/10.3892/ol.2019.11079
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