Abstract
Purpose
Tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) represents a central point of convergence for the signal transduction by the TNFR and the IL-lR/TLR superfamilies. We conducted this retrospective clinical study focusing on TRAF6 expression associated with overall survival and chemotherapeutical sensitivity in a large population with advanced non-small cell lung cancer (NSCLC).
Methods
A total of 324 patients with stage III and IV NSCLC were retrospectively enrolled. Immunohistochemistry was performed to evaluate the expression of TRAF6, apoptosis-related proteins Bcl-2, Bax, Fas, and FasL, as well as the density of CD8+ and FOXP3+ tumor infiltrating lymphocytes (TILs) in tumor microenvironment.
Results
A total of 193 carcinomas (59.6 %) were identified as high expression of TRAF6. TRAF6 expression was not significantly related with histology and clinic stage. No obvious correlation of TRAF6 expression with apoptosis-related protein and TILs density was identified. TRAF6 status was correlated inversely with response to chemotherapy in overall patients (response rates 24.9 and 32.8 %, for patients with high-TRAF6 and low-TRAF6 tumors, respectively, P = 0.039). However, multivariate logistic regression analysis could not identify TRAF6 status as an independent predictor for the response to chemotherapy in overall cohort (95 % CI: 0.91–3.32, P = 0.065). The overall survival was not significantly associated with TRAF6 expression (P = 0.616).
Conclusions
Our results provide new insight for the biological properties and clinical relevance of the TRAF6 in NSCLC. TRAF6 is a promise target for therapeutic strategies against cancer.
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Abbreviations
- FOXP3:
-
Forkhead box P3
- HPF:
-
High power field
- IHC:
-
Immunohistochemistry
- NSCLC:
-
Non-small cell lung cancer
- OS:
-
Overall survival
- TIL:
-
Tumor infiltrating lymphocytes
- TNF:
-
Tumor necrosis factor
- TRAF6:
-
TNF receptor-associated factor 6
- Treg:
-
Regulatory T lymphocytes
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Acknowledgments
This work was supported by grants from the National Science Foundation of China (Grants 81000986).
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All other authors indicated no potential conflict of interest.
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Liu, H., Zhang, T., Ye, J. et al. TNF receptor-associated factor 6 in advanced non-small cell lung cancer: clinical and prognostic implications. J Cancer Res Clin Oncol 138, 1853–1863 (2012). https://doi.org/10.1007/s00432-012-1255-6
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DOI: https://doi.org/10.1007/s00432-012-1255-6