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Erschienen in: Journal of Cancer Research and Clinical Oncology 9/2019

06.07.2019 | Original Article – Clinical Oncology

Co-expression network analysis identified candidate biomarkers in association with progression and prognosis of breast cancer

verfasst von: Qiang Zhou, Jiangbo Ren, Jinxuan Hou, Gang Wang, Lingao Ju, Yu Xiao, Yan Gong

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 9/2019

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Abstract

Purpose

Breast cancer is one of the most common malignancies among females, and its prognosis is affected by a complex network of gene interactions. Weighted gene co-expression network analysis was used to construct free-scale gene co-expression networks and to identify potential biomarkers for breast cancer progression.

Methods

The gene expression profiles of GSE42568 were downloaded from the Gene Expression Omnibus database. RNA-sequencing data and clinical information of breast cancer from TCGA were used for validation.

Results

A total of ten modules were established by the average linkage hierarchical clustering. We identified 58 network hub genes in the significant module (R2 = 0.44) and 6 hub genes (AGO2, CDC20, CDCA5, MCM10, MYBL2, and TTK), which were significantly correlated with prognosis. Receiver-operating characteristic curve validated that the mRNA levels of these six genes exhibited excellent diagnostic efficiency in the test data set of GSE42568. RNA-sequencing data from TCGA showed that the expression levels of these six genes were higher in triple-negative tumors. One-way ANOVA suggested that these six genes were upregulated at more advanced stages. The results of independent sample t test indicated that MCM10 and TTK were associated with tumor size, and that AGO2, CDC20, CDCA5, MCM10, and MYBL2 were overexpressed in lymph-node positive breast cancer.

Conclusions

AGO2, CDC20, CDCA5, MCM10, MYBL2, and TTK were identified as candidate biomarkers for further basic and clinical research on breast cancer based on co-expression analysis.
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Metadaten
Titel
Co-expression network analysis identified candidate biomarkers in association with progression and prognosis of breast cancer
verfasst von
Qiang Zhou
Jiangbo Ren
Jinxuan Hou
Gang Wang
Lingao Ju
Yu Xiao
Yan Gong
Publikationsdatum
06.07.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 9/2019
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-019-02974-4

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