Gene expression in triple-negative breast cancer in relation to survival.

Abstract

PURPOSE:

The identification of biomarkers related to the prognosis of triple-negative breast cancer (TNBC) is critically important for improved understanding of the biology that drives TNBC progression.

METHODS:

We evaluated gene expression in total RNA isolated from formalin-fixed paraffin-embedded tumor samples using the NanoString nCounter assay for 469 TNBC cases from the Shanghai Breast Cancer Survival Study. We used Cox regression to quantify Hazard Ratios (HR) and corresponding confidence intervals (CI) for overall survival (OS) and disease-free survival (DFS) in models that included adjustment for breast cancer intrinsic subtype. Of 302 genes in our discovery analysis, 22 were further evaluated in relation to OS among 134 TNBC cases from the Nashville Breast Health Study and the Southern Community Cohort Study; 16 genes were further evaluated in relation to DFS in 335 TNBC cases from four gene expression omnibus datasets. Fixed-effect meta-analysis was used to combine results across data sources.

RESULTS:

Twofold higher expression of EOMES (HR 0.90, 95% CI 0.83-0.97), RASGRP1 (HR 0.89, 95% CI 0.82-0.97), and SOD2 (HR 0.80, 95% CI 0.66-0.96) was associated with better OS. Twofold higher expression of EOMES (HR 0.89, 95% CI 0.81-0.97) and RASGRP1 (HR 0.87, 95% CI 0.81-0.95) was also associated with better DFS. On the contrary, a doubling of FA2H (HR 1.14, 95% CI 1.06-1.22) and GSPT1 (HR 1.33, 95% CI 1.14-1.55) expression was associated with shorter DFS.

CONCLUSIONS:

We identified five genes (EOMES, FA2H, GSPT1, RASGRP1, and SOD2) that may serve as potential prognostic biomarkers and/or therapeutic targets for TNBC.

• Authors: Shuyang Wang, Alicia Beeghly-Fadiel, Qiuyin Cai, Hui Cai, Xingyi Guo, Liang Shi, Jie Wu, Fei Ye, Qingchao Qiu, Ying Zheng, Wei Zheng, Ping-Ping Bao, Xiao-Ou Shu
• Journal: Breast cancer research and treatment (Breast Cancer Res Treat) Vol. 171 Issue 1 Pg. 199-207 (Aug 2018) ISSN: 1573-7217 [Electronic] Netherlands
• PMID: 29748761 (Publication Type: Journal Article)

Chemical References

• Biomarkers, Tumor

Topics

• Adult
• Aged
• Biomarkers, Tumor
• Female
• Gene Expression
• Gene Expression Profiling
• Gene Expression Regulation, Neoplastic
• Humans
• Middle Aged
• Neoplasm Grading
• Neoplasm Staging
• Population Surveillance
• Prognosis
• Registries
• Survival Analysis
• Triple Negative Breast Neoplasms (epidemiology, genetics, mortality, pathology)