Abstract
Background
Interleukin (IL)-13 is an immunoregulatory, anti-inflammatory cytokine that is produced by numerous immune cells, and plasma membrane receptor for IL-13 (IL-13R) is known to be expressed in various human malignancies and in immune cells.
Methods
The authors evaluated the expression of IL-13R alpha 1 (IL-13Rα1, an IL-13R subtype) by immunohistochemistry in tissue microarrays of 1213 invasive breast cancer (IBC) samples to determine the prognostic value of IL-13Rα1 expression.
Results
High IL-13Rα1 expression was observed in 619 (51%) cases and was found to be associated with an older (≥50 years) age (p = 0.022), lymph node metastasis (p = 0.015), ductal and micropapillary histologic subtypes (p < 0.001), lymphovascular invasion (p = 0.012), HER2 positivity (p < 0.001), and a high (>20%) Ki-67 index (p = 0.039). No significant correlation was found between IL-13Rα1 expression and clinicopathological variables, including tumor size, histological grade, hormone receptor expressions, and tumor-infiltrating lymphocyte levels. Patients with high IL-13Rα1 expression showed poorer overall survival (p = 0.044) and disease-free survival (DFS, p = 0.001) than those with low/negative expression. Subgroup analysis revealed an association between IL-13Rα1 expression and survival for HER2-negative, but not for HER2-positive tumors. Multivariate analysis showed high IL-13Rα1 expression was an independent negative prognostic factor of DFS (p = 0.019).
Conclusions
The results of this study suggest the IL-13 and IL-13Rα1 interaction promotes cancer cell growth and metastasis, and IL-13Rα1 expression is a potential prognostic marker in IBC.
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Acknowledgment
This study was supported by the Medical Research Center Program (2015R1A5A2009124) through the National Research Foundation of Korea (NRF), Ministry of Science, ICT and Future Planning (Y.K.B. and J.-R.K.) and the National Research Foundation of Korea (NRF) grant funded by the Korea government (2014R1A5A2009242) (B.L.).
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The authors have no conflict of interest to declare.
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Park, M.H., Kwon, H.J., Kim, JR. et al. Elevated Interleukin-13 Receptor Alpha 1 Expression in Tumor Cells Is Associated with Poor Prognosis in Patients with Invasive Breast Cancer. Ann Surg Oncol 24, 3780–3787 (2017). https://doi.org/10.1245/s10434-017-5907-2
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DOI: https://doi.org/10.1245/s10434-017-5907-2