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Overexpression of ILK1 in breast cancer associates with poor prognosis

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Tumor Biology

Abstract

Integrin-linked kinase 1 (ILK1), a member of the serine/threonine kinases, has been demonstrated to be associated with numerous biological and pathological processes. However, the role of ILK1 in breast cancer has not been thoroughly elucidated. The purpose of this study was to assess ILK1 expression and to explore its contribution to breast cancer. The ILK1 mRNA expression was measured by real-time quantitative reverse transcriptase-polymerase chain reaction. In addition, ILK1 expression was analyzed by immunohistochemistry in 163 clinicopathologically characterized breast cancer cases. The relationship between ILK1 expression and clinicopathological features was analyzed by appropriate statistics. Kaplan–Meier analysis and Cox proportional hazard regression models were used to investigate the correlation between ILK1 expression and prognosis of breast cancer patients. The relative mRNA expression of ILK1 was significantly higher in breast cancer tissues than in adjacent noncancerous tissues (P < 0.001). In addition, ILK1 expression was significantly correlated with tumor size (P = 0.016), grade (P = 0.024), stage (P = 0.029), lymph node metastases (P = 0.007), and estrogen receptor status (P = 0.002). Kaplan–Meier analysis indicated that patients with high ILK1 expression had poor overall survival (P < 0.001). Multivariate analysis showed that high ILK1 expression was an independent predictor of overall survival. In conclusion, our data suggest for the first time that the increased expression of ILK1 in breast cancer is associated significantly with aggressive progression and poor prognosis. ILK1 may be an important molecular marker for predicting the carcinogenesis, progression, and prognosis of breast cancer.

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Acknowledgments

This work was supported by Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang Province, China.

This work was also supported by Natural Science Foundation of Zhejiang Province, China (No. Y12H160164 and No. Y2100681), Foundation of Science Technology Department of Zhejiang Province, China (No.2011C23043 and No.2012C23072), Traditional Chinese Medical Research Foundation of Zhejiang Province, China (No.2011ZA016), and Foundation of Science Technology Department of Hangzhou, Zhejiang Province, China(No.20110733Q04, and No.20110733Q21).

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Authors and Affiliations

  1. Department of Breast Surgery, Zhejiang Cancer Hospital, No. 38, Guangji Road, Hangzhou, 310022, China

    Hong-Jian Yang & Xing-Fei Yu

  2. Department of Internal Oncology, Zhejiang Cancer Hospital, No. 38, Guangji Road, Hangzhou, 310022, China

    Ya-Bing Zheng

  3. College of Life Sciences, Zhejiang Sci-Tech University, Xiasha 2# Road, Hangzhou, Zhejiang, 310018, China

    Ting Ji & Xian-Feng Ding

  4. Zhejiang Institute of Microbiology, No. 9, Huanggushan Road, Hangzhou, 310012, China

    Cong Zhu

  5. Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, No. 38, Guangji Road, Hangzhou, 310022, China

    Zhi-Qiang Ling

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  1. Hong-Jian Yang
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Correspondence to Xing-Fei Yu or Zhi-Qiang Ling.

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Hong-Jian Yang and Ya-Bing Zheng contributed equally to this work.

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Yang, HJ., Zheng, YB., Ji, T. et al. Overexpression of ILK1 in breast cancer associates with poor prognosis. Tumor Biol. 34, 3933–3938 (2013). https://doi.org/10.1007/s13277-013-0981-y

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  • DOI: https://doi.org/10.1007/s13277-013-0981-y

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