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      Pembrolizumab for Early Triple-Negative Breast Cancer

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          Abstract

          Previous trials showed promising antitumor activity and an acceptable safety profile associated with pembrolizumab in patients with early triple-negative breast cancer. Whether the addition of pembrolizumab to neoadjuvant chemotherapy would significantly increase the percentage of patients with early triple-negative breast cancer who have a pathological complete response (defined as no invasive cancer in the breast and negative nodes) at definitive surgery is unclear.

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          Pathological complete response and long-term clinical benefit in breast cancer: the CTNeoBC pooled analysis.

          Patricia Cortazar, Lijun Zhang, Michael Untch … (2014)
          Pathological complete response has been proposed as a surrogate endpoint for prediction of long-term clinical benefit, such as disease-free survival, event-free survival (EFS), and overall survival (OS). We had four key objectives: to establish the association between pathological complete response and EFS and OS, to establish the definition of pathological complete response that correlates best with long-term outcome, to identify the breast cancer subtypes in which pathological complete response is best correlated with long-term outcome, and to assess whether an increase in frequency of pathological complete response between treatment groups predicts improved EFS and OS. We searched PubMed, Embase, and Medline for clinical trials of neoadjuvant treatment of breast cancer. To be eligible, studies had to meet three inclusion criteria: include at least 200 patients with primary breast cancer treated with preoperative chemotherapy followed by surgery; have available data for pathological complete response, EFS, and OS; and have a median follow-up of at least 3 years. We compared the three most commonly used definitions of pathological complete response--ypT0 ypN0, ypT0/is ypN0, and ypT0/is--for their association with EFS and OS in a responder analysis. We assessed the association between pathological complete response and EFS and OS in various subgroups. Finally, we did a trial-level analysis to assess whether pathological complete response could be used as a surrogate endpoint for EFS or OS. We obtained data from 12 identified international trials and 11 955 patients were included in our responder analysis. Eradication of tumour from both breast and lymph nodes (ypT0 ypN0 or ypT0/is ypN0) was better associated with improved EFS (ypT0 ypN0: hazard ratio [HR] 0·44, 95% CI 0·39-0·51; ypT0/is ypN0: 0·48, 0·43-0·54) and OS (0·36, 0·30-0·44; 0·36, 0·31-0·42) than was tumour eradication from the breast alone (ypT0/is; EFS: HR 0·60, 95% CI 0·55-0·66; OS 0·51, 0·45-0·58). We used the ypT0/is ypN0 definition for all subsequent analyses. The association between pathological complete response and long-term outcomes was strongest in patients with triple-negative breast cancer (EFS: HR 0·24, 95% CI 0·18-0·33; OS: 0·16, 0·11-0·25) and in those with HER2-positive, hormone-receptor-negative tumours who received trastuzumab (EFS: 0·15, 0·09-0·27; OS: 0·08, 0·03, 0·22). In the trial-level analysis, we recorded little association between increases in frequency of pathological complete response and EFS (R(2)=0·03, 95% CI 0·00-0·25) and OS (R(2)=0·24, 0·00-0·70). Patients who attain pathological complete response defined as ypT0 ypN0 or ypT0/is ypN0 have improved survival. The prognostic value is greatest in aggressive tumour subtypes. Our pooled analysis could not validate pathological complete response as a surrogate endpoint for improved EFS and OS. US Food and Drug Administration. Copyright © 2014 Elsevier Ltd. All rights reserved.
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            Adjuvant Capecitabine for Breast Cancer after Preoperative Chemotherapy

            Norikazu Masuda, Soo-Jung Lee, Byeong-Woo Park … (2017)
            Patients who have residual invasive carcinoma after the receipt of neoadjuvant chemotherapy for human epidermal growth factor receptor 2 (HER2)-negative breast cancer have poor prognoses. The benefit of adjuvant chemotherapy in these patients remains unclear.
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              Cancer immunotherapy: the beginning of the end of cancer?

              Sofia Farkona, Eleftherios P. Diamandis, Ivan M Blasutig (2016)
              These are exciting times for cancer immunotherapy. After many years of disappointing results, the tide has finally changed and immunotherapy has become a clinically validated treatment for many cancers. Immunotherapeutic strategies include cancer vaccines, oncolytic viruses, adoptive transfer of ex vivo activated T and natural killer cells, and administration of antibodies or recombinant proteins that either costimulate cells or block the so-called immune checkpoint pathways. The recent success of several immunotherapeutic regimes, such as monoclonal antibody blocking of cytotoxic T lymphocyte-associated protein 4 (CTLA-4) and programmed cell death protein 1 (PD1), has boosted the development of this treatment modality, with the consequence that new therapeutic targets and schemes which combine various immunological agents are now being described at a breathtaking pace. In this review, we outline some of the main strategies in cancer immunotherapy (cancer vaccines, adoptive cellular immunotherapy, immune checkpoint blockade, and oncolytic viruses) and discuss the progress in the synergistic design of immune-targeting combination therapies.
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                Author and article information

                Journal
                Title: New England Journal of Medicine
                Abbreviated Title: N Engl J Med
                Publisher: Massachusetts Medical Society
                ISSN (Print): 0028-4793
                ISSN (Electronic): 1533-4406
                Publication date Created: February 27 2020
                Publication date (Print): February 27 2020
                Volume: 382
                Issue: 9
                Pages: 810-821
                Affiliations
                [1 ]From Barts Cancer Institute, Queen Mary University of London, London (P.S.); International Oncology Bureau Institute of Oncology, Quirón Group, Madrid, and Vall d’Hebron Institute of Oncology, Barcelona (J.C.) — both in Spain; Yale School of Medicine, Yale Cancer Center, New Haven, CT (L.P.); Cedars-Sinai Medical Center, Los Angeles (H.M.); Kliniken Essen-Mitte, Essen (S.K.), the Institute of Pathology, Philipps-University Marburg and University of Marburg, Marburg (C.D.), the Breast Center, Department...
                Article
                DOI: 10.1056/NEJMoa1910549
                PubMed ID: 32101663
                SO-VID: 2eb2759b-6c56-4bd6-9f64-f42f1ead45b7
                Copyright © © 2020
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                http://www.nejmgroup.org/legal/terms-of-use.htm

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