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- W2141493637 abstract "The primary objective of this study was to determine whether markers of differentiation and activation of the Akt pathway are associated with metastasis in adenocarcinoma of the lung.Paired primary and metastatic tumor samples were obtained from 41 patients who had undergone resection of both primary lung adenocarcinoma and brain metastatic lesions. Paired samples were compared for relative expression of thyroid transcription factor 1 (TTF-1) and E-cadherin as potential markers of differentiation. Activation of the Akt pathway was assessed by expression of p-Akt and p-S6. Biomarkers that showed relative discordance in expression between the matched pairs were then assessed in a cohort of 77 primary lung adenocarcinomas. Validation was done in an independent cohort of 82 primary lung adenocarcinomas.Among the 41 matched pairs, E-cadherin (23 discordant pairs) and TTF-1 (18 discordant pairs) were overexpressed in primary tumors (20 of 23 and 15 of 18, respectively). In contrast, p-S6 overexpression was significantly associated with metastatic tumors (20 of 21 discordant pairs). The expression of E-cadherin, p-S6, and TTF-1 was evaluated in 77 primary lung adenocarcinomas, in which high p-S6 expression was associated with shorter time to metastasis. The association of p-S6 with metastasis was then validated in an independent set of 82 tumors. In multivariable analysis, p-S6 expression was a negative independent predictor of metastasis-free survival after adjustment for tumor stage.The biomarker p-S6 is overexpressed in metastatic tumors. In primary tumors, higher p-S6 expression is associated with shorter metastatic-free survival. This biomarker has the potential for risk stratification in future clinical trials." @default.
- W2141493637 created "2016-06-24" @default.
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- W2141493637 date "2008-12-01" @default.
- W2141493637 modified "2023-09-30" @default.
- W2141493637 title "Elevated Phospho-S6 Expression Is Associated with Metastasis in Adenocarcinoma of the Lung" @default.
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- W2141493637 doi "https://doi.org/10.1158/1078-0432.ccr-08-0565" @default.
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