期刊
CLINICAL & TRANSLATIONAL ONCOLOGY
卷 14, 期 3, 页码 232-236出版社
SPRINGER
DOI: 10.1007/s12094-012-0789-z
关键词
Breast cancer; Phosphorylation; STAT3; Tissue microarray; Immunohistochemistry
类别
资金
- Sharett Institute of Oncology
- Goldyne Savad Institute of Gene Therapy
- Hadassah Medical Center
- American Physicians' Fellowship (APF) for Medicine in Israel
Background Although lymph node-positive breast cancers are associated with poorer prognosis, individual patients may have different clinical outcomes. Signal transducer and activator of transcription 3 (STAT3) is a point of convergence for numerous oncogenic signalling pathways. The goal of this study was to determine the prognostic value of phosphorylated (tyrosine705)-STAT3 in node-positive breast cancer patients. Methods Immunohistochemical analysis of Phospho-STAT3 was performed on a tissue microarray of breast cancer specimens. The expression pattern of Phospho-STAT3 was correlated with survival outcome, and clinical and pathological parameters. Results Out of 125 interpretable tumours, positive Phospho-STAT3 nuclear expression was seen in 35 (28%) of tumours. There was no significant relationship between Phospho-STAT3 expression and clinical-pathological parameters including age, hormonal receptor status, grade and tumour size. Interestingly positive tumours had a significantly improved disease-free survival at 5 years (p=0.035). Additionally, positive Phospho-STAT3 nuclear expression was correlated with significantly improved survival at both 5 years (p=0.023) and 10 years (p=0.026). Finally, in multivariate analyses Phospho-STAT3 was found to be an independent prognostic marker of overall survival in node-positive breast cancer patients. Conclusion These findings support the role of Phospho-STAT3 as an important independent prognostic marker in node-positive breast cancer patients.
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