Journal
ARCHIVES OF PHARMACAL RESEARCH
Volume 42, Issue 11, Pages 947-961Publisher
PHARMACEUTICAL SOC KOREA
DOI: 10.1007/s12272-019-01189-y
Keywords
Breast cancer; Prognostic biomarker; Predictive biomarker; Multigene assay; Immune gene signatures; Tumor-infiltrating lymphocytes
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Funding
- Basic Science Research Program through the National Research Foundation of a Korea (NRF) - Ministry of Education [NRF-2018R1D1A1B07043031]
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Several multigene assays have been developed to predict the risk of distant recurrence and response to adjuvant therapy in early breast cancer. However, the prognostic or predictive value of current proliferation gene signature-based assays are limited to hormone receptor-positive, human epidermal growth factor receptor 2-negative (HR+/HER2-) early breast cancer. Considerable discordance between the different assays in classifying patients into risk groups has also been reported, thus raising questions about the clinical utility of these assays for individual patients. Therefore, there still remains a need for better prognostic or predictive biomarkers for breast cancer. The role of immune cells comprising tumor microenvironment in tumor progression has been recognized. Accumulating evidences have shown that immune gene signatures and tumor-infiltrating lymphocytes (TILs) can be prognostic or predictive factors in breast cancer, particularly with regard to HER2+ and triple-negative breast cancer. In this review, I summarize current multigene assays for breast cancer and discuss recent progress in identifying novel breast cancer biomarkers, focusing on the emerging importance of immune gene signatures and TILs as prognostic or predictive biomarkers.
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