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      Immunotherapy of gastric cancer: Present status and future perspectives

      editorial

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          Abstract

          In this editorial, we comment on the article entitled “Advances and key focus areas in gastric cancer immunotherapy: A comprehensive scientometric and clinical trial review (1999-2023),” which was published in the recent issue of the World Journal of Gastroenterology. We focused on the results of the authors’ bibliometric analysis concerning gastric cancer immunotherapy, which they analyzed in depth by compiling the relevant publications of the last 20 years. Before that, we briefly describe the most recent data concerning the epidemiological parameters of gastric cancer (GC) in different countries, attempting to give an interpretation based on the etiological factors involved in the etiopathogenesis of the neoplasm. We then briefly discuss the conservative treatment (chemotherapy) of the various forms of this malignant neoplasm. We describe the treatment of resectable tumors, locally advanced neoplasms, and unresectable (advanced) cases. Special attention is given to modern therapeutic approaches with emphasis on immunotherapy, which seems to be the future of GC treatment, especially in combination with chemotherapy. There is also a thorough analysis of the results of the study under review in terms of the number of scientific publications, the countries in which the studies were conducted, the authors, and the scientific centers of origin, as well as the clinical studies in progress. Finally, an attempt is made to draw some con-clusions and to point out possible future directions.

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          Most cited references92

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          Software survey: VOSviewer, a computer program for bibliometric mapping

          We present VOSviewer, a freely available computer program that we have developed for constructing and viewing bibliometric maps. Unlike most computer programs that are used for bibliometric mapping, VOSviewer pays special attention to the graphical representation of bibliometric maps. The functionality of VOSviewer is especially useful for displaying large bibliometric maps in an easy-to-interpret way. The paper consists of three parts. In the first part, an overview of VOSviewer’s functionality for displaying bibliometric maps is provided. In the second part, the technical implementation of specific parts of the program is discussed. Finally, in the third part, VOSviewer’s ability to handle large maps is demonstrated by using the program to construct and display a co-citation map of 5,000 major scientific journals.
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            Predictive correlates of response to the anti-PD-L1 antibody MPDL3280A in cancer patients.

            The development of human cancer is a multistep process characterized by the accumulation of genetic and epigenetic alterations that drive or reflect tumour progression. These changes distinguish cancer cells from their normal counterparts, allowing tumours to be recognized as foreign by the immune system. However, tumours are rarely rejected spontaneously, reflecting their ability to maintain an immunosuppressive microenvironment. Programmed death-ligand 1 (PD-L1; also called B7-H1 or CD274), which is expressed on many cancer and immune cells, plays an important part in blocking the 'cancer immunity cycle' by binding programmed death-1 (PD-1) and B7.1 (CD80), both of which are negative regulators of T-lymphocyte activation. Binding of PD-L1 to its receptors suppresses T-cell migration, proliferation and secretion of cytotoxic mediators, and restricts tumour cell killing. The PD-L1-PD-1 axis protects the host from overactive T-effector cells not only in cancer but also during microbial infections. Blocking PD-L1 should therefore enhance anticancer immunity, but little is known about predictive factors of efficacy. This study was designed to evaluate the safety, activity and biomarkers of PD-L1 inhibition using the engineered humanized antibody MPDL3280A. Here we show that across multiple cancer types, responses (as evaluated by Response Evaluation Criteria in Solid Tumours, version 1.1) were observed in patients with tumours expressing high levels of PD-L1, especially when PD-L1 was expressed by tumour-infiltrating immune cells. Furthermore, responses were associated with T-helper type 1 (TH1) gene expression, CTLA4 expression and the absence of fractalkine (CX3CL1) in baseline tumour specimens. Together, these data suggest that MPDL3280A is most effective in patients in which pre-existing immunity is suppressed by PD-L1, and is re-invigorated on antibody treatment.
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              Neoantigens in cancer immunotherapy.

              The clinical relevance of T cells in the control of a diverse set of human cancers is now beyond doubt. However, the nature of the antigens that allow the immune system to distinguish cancer cells from noncancer cells has long remained obscure. Recent technological innovations have made it possible to dissect the immune response to patient-specific neoantigens that arise as a consequence of tumor-specific mutations, and emerging data suggest that recognition of such neoantigens is a major factor in the activity of clinical immunotherapies. These observations indicate that neoantigen load may form a biomarker in cancer immunotherapy and provide an incentive for the development of novel therapeutic approaches that selectively enhance T cell reactivity against this class of antigens. Copyright © 2015, American Association for the Advancement of Science.
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                Author and article information

                Contributors
                Journal
                World J Gastroenterol
                World J Gastroenterol
                WJG
                World Journal of Gastroenterology
                Baishideng Publishing Group Inc
                1007-9327
                2219-2840
                28 February 2024
                28 February 2024
                : 30
                : 8
                : 779-793
                Affiliations
                Inflammatory Bowel Disease Unit, “Metropolitan General” Hospital, Holargos 15562, Attica, Greece. Hellenic Society for Gastrointestinal Oncology, 354 Iera Odos, Chaidari 12461, Attica, Greece
                Second Department of Surgery, University of Athens School of Medicine, Aretaieion Hospital, Athens 11528, Attica, Greece
                Unit of Surgical Research and Training, Second Department of Surgery, University of Athens, School of Medicine, Aretaieion Hospital, Athens 11528, Attica, Greece. apostolospapalois@ 123456gmail.com
                Author notes

                Author contributions: All authors contributed to the preparation of the final manuscript.

                Corresponding author: Apostolos E Papalois, DPhil, Visiting Professor, Unit of Surgical Research and Training, Second Department of Surgery, University of Athens, School of Medicine, Aretaieion Hospital, 76 Vas Sophias Avenue, Athens 11528, Attica, Greece. apostolospapalois@ 123456gmail.com

                Article
                jWJG.v30.i8.pg779 89562
                10.3748/wjg.v30.i8.779
                10950642
                38516237
                1d37d2f4-d437-4915-a74a-8e821594f91f
                ©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.

                This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

                History
                : 5 November 2023
                : 14 December 2023
                : 29 January 2024
                Categories
                Editorial

                gastric cancer,chemotherapy,immunotherapy,immune checkpoint inhibitors,bibliometrics,scientometrics

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