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      Polypeptide N-acetylgalactosaminyltransferase-6 expression independently predicts poor overall survival in patients with lung adenocarcinoma after curative resection

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          Abstract

          Background

          Polypeptide N-acetylgalactosaminyltransferases (GalNAc-Ts) are important glycosyltransferases in cancer, but the clinical role of its individual isoforms is unclear. We investigated the clinical significance and survival relevance of one isoform, GalNAc-T6 in lung adenocarcinoma after curative resection.

          Results

          GalNAc-T6 was identified in 27.8% (55/198) of patients, and statistically indicated advanced TNM stage ( P = 0.069). Multivariate analysis showed GalNAc-T6 to be an independent predictor for reduced overall survival of patients ( P = 0.027), and the result was confirmed with bootstraping techniques, and on line “Kaplan-Meier Plotter” and “SurvExpress” database analysis, respectively. Moreover, ROC curve demonstrated that GalNAc-T6 expression significantly improved the accuracy of survival prediction.

          Methods

          With 198 paraffin-embedded tumor samples from lung adenocarcinoma patients, GalNAc-T6 expression was immunohistochemically assessed for the association with clinicopathological parameters. The prognostic significance was evaluated by Cox proportional hazards regression analysis with 1000 bootstraping. “Kaplan-Meier Plotter”, “SurvExpress” database analysis, and receiver-operating characteristic (ROC) curve were performed to provide further validation.

          Conclusions

          GalNAc-T6 expression correlated significantly with advanced TNM stage, and independently predicted worse OS for lung adenocarcinoma.

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          Most cited references43

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          REporting recommendations for tumour MARKer prognostic studies (REMARK)

          Despite years of research and hundreds of reports on tumour markers in oncology, the number of markers that have emerged as clinically useful is pitifully small. Often initially reported studies of a marker show great promise, but subsequent studies on the same or related markers yield inconsistent conclusions or stand in direct contradiction to the promising results. It is imperative that we attempt to understand the reasons that multiple studies of the same marker lead to differing conclusions. A variety of methodological problems have been cited to explain these discrepancies. Unfortunately, many tumour marker studies have not been reported in a rigorous fashion, and published articles often lack sufficient information to allow adequate assessment of the quality of the study or the generalisability of the study results. The development of guidelines for the reporting of tumour marker studies was a major recommendation of the US National Cancer Institute and the European Organisation for Research and Treatment of Cancer (NCI-EORTC) First International Meeting on Cancer Diagnostics in 2000. Similar to the successful CONSORT initiative for randomised trials and the STARD statement for diagnostic studies, we suggest guidelines to provide relevant information about the study design, preplanned hypotheses, patient and specimen characteristics, assay methods, and statistical analysis methods. In addition, the guidelines suggest helpful presentations of data and important elements to include in discussions. The goal of these guidelines is to encourage transparent and complete reporting so that the relevant information will be available to others to help them to judge the usefulness of the data and understand the context in which the conclusions apply.
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            Survival model predictive accuracy and ROC curves.

            The predictive accuracy of a survival model can be summarized using extensions of the proportion of variation explained by the model, or R2, commonly used for continuous response models, or using extensions of sensitivity and specificity, which are commonly used for binary response models. In this article we propose new time-dependent accuracy summaries based on time-specific versions of sensitivity and specificity calculated over risk sets. We connect the accuracy summaries to a previously proposed global concordance measure, which is a variant of Kendall's tau. In addition, we show how standard Cox regression output can be used to obtain estimates of time-dependent sensitivity and specificity, and time-dependent receiver operating characteristic (ROC) curves. Semiparametric estimation methods appropriate for both proportional and nonproportional hazards data are introduced, evaluated in simulations, and illustrated using two familiar survival data sets.
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              Mucins in cancer: protection and control of the cell surface.

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                Author and article information

                Journal
                Oncotarget
                Oncotarget
                Oncotarget
                ImpactJ
                Oncotarget
                Impact Journals LLC
                1949-2553
                23 August 2016
                3 June 2016
                : 7
                : 34
                : 54463-54473
                Affiliations
                1 Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China
                2 Department of Pathology and Cell Biology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
                3 Bio-information Research Center, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
                4 Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
                5 The President Laboratory, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
                6 Laboratory of Pathology, Fukuoka Wajiro Hospital, Fukuoka, Japan
                7 Division of Thoracic Surgery, Saitama Cancer Center, Saitama, Japan
                8 Asahi-Matsumoto Hospital, Kitakyushu, Japan
                9 Institute of Pathology, Medical University of Graz, Graz, Austria
                10 Department of Pathology, Field of Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
                Author notes
                Correspondence to: Yun-Peng Liu, cmuliuyunpeng@ 123456hotmail.com
                Article
                9810
                10.18632/oncotarget.9810
                5342355
                27276675
                c8b88513-33e1-4f9a-809c-33f5f9158845
                Copyright: © 2016 Li et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 2 March 2016
                : 4 May 2016
                Categories
                Research Paper

                Oncology & Radiotherapy
                galnac-t6,glycosylation,lung adenocarcinoma,prognosis,overall survival
                Oncology & Radiotherapy
                galnac-t6, glycosylation, lung adenocarcinoma, prognosis, overall survival

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