The role of IRAK1 in breast cancer patients treated with neoadjuvant chemotherapy
Authors Yang M, Qin X, Qin G, Zheng X
Received 29 August 2018
Accepted for publication 14 January 2019
Published 25 March 2019 Volume 2019:12 Pages 2171—2180
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Cristina Weinberg
Peer reviewer comments 2
Editor who approved publication: Dr William Cho
Muwen Yang,1 Xingsong Qin,1 Guangyuan Qin,2 Xinyu Zheng1,2
1Department of Breast Surgery, First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China; 2Breast Cancer Institute of the First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
Background: IRAK1 has been shown to be abnormally expressed in a set of tumors leading to tumorigenesis and progression. IRAK1 is a therapeutic target that drives breast cancer metastasis and resistance to paclitaxel. However, the exact role of IRAK1 in neoadjuvant chemotherapy (NCT) for breast cancer remains unclear. The aim of this study was to investigate the relationship between the expression of IRAK1 and the clinicopathological parameters and survival prognosis of breast cancer patients treated with NCT.
Patients and methods: Based on the clinical data and mRNA microarray data from 1,085 breast cancer patients in The Cancer Genome Atlas, the correlation between IRAK1 expression and clinicopathological parameters of breast cancer was analyzed. Immunohistochemistry was performed to evaluate the expression of IRAK1. The Human Protein Atlas and the String database were used to analyze the expression of IRAK1 protein and its interaction with altered neighboring proteins in breast cancer. IRAK1 alteration was analyzed in cBioPortal database. GEO enrichment of IRAK1 was performed using WEB-based Gene SeT AnaLysis Toolkit.
Results: The expression of IRAK1 was significantly downregulated following NCT. The decreased expression of IRAK1 following NCT was positively correlated with reduced tumor size. Finally, survival analysis confirmed that a shorter survival period was correlated to higher expression of IRAK1 both before and after NCT.
Conclusion: These findings advanced our understanding about the expression pattern of IRAK1 in breast cancer, especially in those patients who were treated with NCT, suggesting that IRAK1 could be used as a prognostic indicator, as well as a potential indicator for evaluating NCT efficacy for breast cancer patients.
Keywords: IRAK1, breast cancer, neoadjuvant chemotherapy, bioinformatics, survival
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