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10.1245/ASO.2006.05.028
Annals of Surgical Oncology 13:802-808 (2006)
© 2006 Society of Surgical Oncology
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Original Article

Expression of Interleukin 11 and Its Receptor and Their Prognostic Value in Human Breast Cancer

Satheesha Hanavadi, MS, FRCS, Tracey A. Martin, PhD, Gareth Watkins, HND, Robert E. Mansel, MS, FRCS and Wen G. Jiang, MB, MCh, MD

University Department of Surgery, Wales College of Medicine, Cardiff University, Heath Park, Cardiff CF4 4XN, United Kingdom

Correspondence: Address correspondence and reprint requests to: Satheesha Hanavadi, MS, FRCS; E-mail: satheeshh{at}yahoo.com

Background: Recent experimental evidence has shown a potential role of interleukin (IL)-11 and its receptor in breast cancer development and progression. However, there is little clinical information to support this hypothesis. We examined the expression of IL-11 and its receptor in primary breast cancer tissue samples and correlated their level of expression with the clinical outcome.

Methods: Primary breast cancer samples (n = 109) and matched background tissue obtained from patients in the cohort (n = 33) were processed for frozen section and RNA extraction. Frozen sections from matched tissues were immunostained with IL-11 and IL-11 receptor antibodies. Staining intensity was analyzed by computer image analysis. RNA was reverse-transcribed and quantified before analysis by quantitative polymerase chain reaction. Results were expressed as the number of transcripts (standardized by ß-actin). The data were compared with the clinical outcome of the disease.

Results: The intensity of staining for both IL-11 and the IL-11 receptor was distinctly high in tumor samples (P < .01). The transcript level of IL-11 was significantly higher in node-positive tumor samples compared with node-negative samples (P = .02). Tumors with a poor prognostic index and poor histological grade showed a higher level of IL-11. A higher level of IL-11 was linked to poorer survival with Kaplan-Meier survival analysis.

Conclusions: IL-11 can be a predictor of poor prognosis in human breast cancer.

Key Words: Interleukin 11 • Interleukin-11 receptor • Breast cancer • Prognosis • Survival




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