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Purpose: In this study we investigated the expression of the p65 subunit of the nuclear factor-kappaB (NF-kB) complex and the activation status of NF-kB by phospho-IkB-alpha antibody.Materials and Methods: A tissue microarray based on material obtained from 107 patients was utilized. The antibody staining was scored by combining staining intensity with percentage of tumor staining. The antibodies used were NF-kB p65 and phospho-IkB-alpha(ser32/36), both from Cell Signaling Technology. The staining scores were correlated with the archival data available on some patients on margin and lymph node status, stage, tumor size, as well as clinical data including survival.Results: The staining was nuclear (p65) and cytoplasmic (p-IkBalpha) respectively. In general there was an increased expression and activation of NF-kB in the carcinomas, compared to non-tumoral regions. None of the markers had a significant correlation with the overall survival. NF-kB(p65) expression had a correlation with positive lymph node status.Conclusion: The correlation with the positive lymph node status suggests a role in invasive properties of the tumor. Activation of NF-kB is most likely an early event in pancreatic carcinogenesis. Despite the lack of an effect on overall survival, due to its increased activation in pancreatic cancer, NF-kB is still a good target for therapeutic interventions. |
