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https://www.readbyqxmd.com/read/29789418/juxtacrine-signaling-inhibits-antitumor-immunity-by-upregulating-pd-l1-expression
#1
Wen-Hao Yang, Jong-Ho Cha, Weiya Xia, Heng-Huan Lee, Li-Chuan Chan, Ying-Nai Wang, Jennifer L Hsu, Guoxin Ren, Mien-Chie Hung
Programmed death-ligand 1 (PD-L1) is a well-known immune checkpoint protein that helps cancer cells evade immune response. Anti-PD-L1 immune therapy has been approved for the treatment of several advanced human cancers. Therefore, further understanding of the regulatory mechanisms of PD-L1 is critical to improve PD-L1-targeting immunotherapy. Recent studies indicated that contact-dependent pathways may regulate anticancer immunity, highlighting the importance of cell contact-induced signaling in cancer immunity...
May 22, 2018: Cancer Research
https://www.readbyqxmd.com/read/29785158/obtaining-adequate-surgical-margin-status-in-breast-conservation-therapy-intraoperative-ultrasound-guided-resection-versus-specimen-mammography
#2
Maria Mihaela Pop, Silviu Cristian, Orsolya Hanko-Bauer, Dana Valentina Ghiga, Rares Georgescu
Background and aim: The purpose of breast-conserving surgery (BCS) for women with cancer is to perform an oncological radical procedure with disease-free margins at the final histological assessment and with the best aesthetic result possible. Intraoperative resected specimen ultrasound and intraoperative resected specimen mammography may reduce the rates of positive margins and reexcision among patients undergoing conserving therapy. Our objective is to compare the two methods with the histopathological results for a preset cut off and asses which parameters can influence the positive margin status...
2018: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29777149/stretching-reduces-tumor-growth-in-a-mouse-breast-cancer-model
#3
L Berrueta, J Bergholz, D Munoz, I Muskaj, G J Badger, A Shukla, H J Kim, J J Zhao, H M Langevin
There is growing interest in developing non-pharmacological treatments that could boost natural defenses against cancer and contribute to primary and secondary cancer prevention. Recent studies have shown that gentle daily stretching for 10 minutes can reduce local connective tissue inflammation and fibrosis. Because mechanical factors within the stroma can influence the tumor microenvironment, we hypothesized that stretching would reduce the growth of tumors implanted within locally stretched tissues and tested this hypothesis in a mouse orthotopic breast cancer model...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773414/hypofractionated-whole-breast-irradiation-with-or-without-boost-in-elderly-patients-clinical-evaluation-of-an-italian-experience
#4
Maria Carmen De Santis, Francesca Bonfantini, Francesca Di Salvo, Alba Fiorentino, Michela Dispinzieri, Mariangela Caputo, Serena Di Cosimo, Gabriella Mariani, Massimiliano Gennaro, Vito Cosentino, Milena Sant, Emanuele Pignoli, Riccardo Valdagni, Laura Lozza
PURPOSE: To examine local control, disease-free survival (DFS), and toxicity in elderly (≥ 65 years) breast cancer patients treated with hypofractionated radiotherapy (hypo-RT) with or without a boost to the tumor bed. PATIENTS AND METHODS: The study was conducted on 752 patients treated from April 2009 to February 2017. Patients received 42.4 Gy in 16 daily fractions (2.65 Gy per fraction). A boost was only administered in cases of grade 3 primary tumor and close or positive margins...
April 22, 2018: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29695348/quality-of-life-results-for-accelerated-partial-breast-irradiation-with-interstitial-brachytherapy-versus-whole-breast-irradiation-in-early-breast-cancer-after-breast-conserving-surgery-gec-estro-5-year-results-of-a-randomised-phase-3-trial
#5
Rebekka Schäfer, Vratislav Strnad, Csaba Polgár, Wolfgang Uter, Guido Hildebrandt, Oliver J Ott, Daniela Kauer-Dorner, Hellen Knauerhase, Tibor Major, Jaroslaw Lyczek, Jose Luis Guinot, Jürgen Dunst, Cristina Gutierrez Miguelez, Pavel Slampa, Michael Allgäuer, Kristina Lössl, György Kovács, Arnt-René Fischedick, Rainer Fietkau, Alexandra Resch, Anna Kulik, Leo Arribas, Peter Niehoff, Ferran Guedea, Annika Schlamann, Christine Gall, Bülent Polat
BACKGROUND: Previous results from the GEC-ESTRO trial showed that accelerated partial breast irradiation (APBI) using multicatheter brachytherapy in the treatment of early breast cancer after breast-conserving surgery was non-inferior to whole-breast irradiation in terms of local control and overall survival. Here, we present 5-year results of patient-reported quality of life. METHODS: We did this randomised controlled phase 3 trial at 16 hospitals and medical centres in seven European countries...
April 20, 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29691075/estro-acrop-guideline-interstitial-multi-catheter-breast-brachytherapy-as-accelerated-partial-breast-irradiation-alone-or-as-boost-gec-estro-breast-cancer-working-group-practical-recommendations
#6
Vratislav Strnad, Tibor Major, Csaba Polgar, Michael Lotter, Jose-Luis Guinot, Cristina Gutierrez-Miguelez, Razvan Galalae, Erik Van Limbergen, Benjamin Guix, Peter Niehoff, Kristina Lössl, Jean-Michel Hannoun-Levi
PURPOSE: This consensus statement from the Breast Cancer Working Group of Groupe Européen de Curiethérapie of European Society for Radiotherapy and Oncology (GEC-ESTRO) aims at generating practical guidelines for multi-catheter image-guided brachytherapy in the conservative management of breast cancer patients used for either Accelerated Partial Breast Irradiation (APBI) or for a breast boost. METHODS: Recent advances in techniques of multi-catheter brachytherapy were summarized and all the relevant literature was reviewed by a panel of experts...
April 21, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29688063/evaluation-of-a-novel-biocompatible-magnetic-nanomedicine-based-on-beta-cyclodextrin-loaded-doxorubicin-curcumin-for-overcoming-chemoresistance-in-breast-cancer
#7
Roghayeh Rastegar, Hamid Akbari Javar, Mehdi Khoobi, Poua Dehghan Kelishadi, Gholam Hossein Yousefi, Mahmoud Doosti, Mohammad Hossien Ghahremani, Ahmad Sharif Tabrizi, Fatemeh Imanparast, Elham Gholibeglu, Mahdi Gholami
Codelivery of chemo-sensitizers with chemotherapeutics using combo nanomedicine is a promising platform for overcoming chemoresistance in breast cancer. However, tumor accumulation of nano-carriers based on enhanced permeability and retention (EPR) effect is confounded by heterogeneity in tumor microenvironment. Adsorption of protein corona on surface of nanoparticle boost up clearance by reticulo-endothelial system. In this study, a surface functionalized magnetic nanocomposite (NC) for codelivery of doxorubicin (DOX) and curcumin (CUR) is developed...
April 24, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29685380/low-levels-of-intra-tumoural-t-cells-in-breast-cancer-identify-clinically-frail-patients-with-shorter-disease-specific-survival
#8
Lisa Speigl, Alexandra Grieb, Nicole Janssen, Sigrid Hatse, Barbara Brouwers, Ann Smeets, Giuseppe Floris, Jithendra Kini Bailur, Cindy Kenis, Patrick Neven, Hans Wildiers, Graham Pawelec, Christopher Shipp
OBJECTIVES: The global health status of older patients with cancer influences their clinical course, but little is known regarding the influence of the immune system on the global health of older patients with cancer. The goal of this study was to assess the relationships between patient fitness/frailty status and survival, and the local tumour immune environment of older patients with breast cancer. MATERIALS AND METHODS: In a cohort of 58 older patients with breast cancer (over 70 years of age), fluorescence microscopy was used to investigate whether levels of intra-tumoural T cells (CD3+) and granulocytic cells (CD15+) could predict patient clinical outcome, and/or whether they correlated with patient physical and mental performance as evaluated by comprehensive geriatric assessment...
April 20, 2018: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/29678525/close-margins-less-than-2-mm-are-not-associated-with-higher-risks-of-10-year-local-recurrence-and-breast-cancer-mortality-compared-with-negative-margins-in-women-treated-with-breast-conserving-therapy
#9
Susan Tyler, Pauline T Truong, Mary Lesperance, Alan Nichol, Chris Baliski, Rebecca Warburton, Scott Tyldesley
PURPOSE: The 2014 Society of Surgical Oncology-American Society for Radiation Oncology consensus suggested "no ink on tumor" is a sufficient surgical margin for invasive breast cancer treated with breast-conserving surgery (BCS). Whether close margins <2 mm are associated with inferior outcomes remains controversial. This study evaluated 10-year outcomes by margin status in a population-based cohort treated with BCS and adjuvant radiation therapy (RT). METHODS AND MATERIALS: The subjects were 10,863 women with invasive cancer categorized as pT1 to T3, any N, and M0 referred from 2001 to 2011, an era in which the institutional policy was to re-excise close or positive margins, except in select cases...
March 13, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29675979/senescent-cells-re-engineered-to-express-spd-1-for-inhibiting-pd-1-pd-l1-as-a-vaccination-approach-against-breast-cancer
#10
Zehong Chen, Kang Hu, Lieting Feng, Ruxiong Su, Nan Lai, Zike Yang, Shijun Kang
Various types of vaccines have been proposed as approaches for prevention or delay of the onset of cancer by boosting the endogenous immune system. We previously developed a senescent-cell-based vaccine, induced by radiation and veliparib, as a preventive and therapeutic tool against triple-negative breast cancer. However, the PD-1/PD-L1 pathway was found to play an important role in vaccine failure. Hence, we further developed sPD1-expressing senescent cells to overcome PD-L1/PD1-mediated immune suppression while vaccinating to promote dendritic cells (DCs) maturity, thereby amplifying T cell activation...
April 20, 2018: Cancer Science
https://www.readbyqxmd.com/read/29674010/one-step-intraoperative-radiotherapy-optimizes-conservative-treatment-of-breast-cancer-with-advantages-in-quality-of-life-and-work-resumption
#11
Luca Sorrentino, Susanna Fissi, Ilaria Meaglia, Daniela Bossi, Ottavia Caserini, Serena Mazzucchelli, Marta Truffi, Sara Albasini, Paola Tabarelli, Marco Liotta, Giovanni B Ivaldi, Fabio Corsi
BACKGROUND: Intraoperative radiotherapy (IORT) could be not-inferior to external beam radiotherapy (EBRT) in selected patients, but toxicities, self-perception of body image, quality of life, and resumption of work or daily activities have been poorly explored. The aim of the present study was to compare these outcomes between EBRT, IORT full-dose (IORT-f) and IORT boost (IORT-b). METHODS: 443 consecutive patients, candidates for breast-conserving surgery, were included: EBRT was performed in 220 patients (49...
April 16, 2018: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29672777/diep-flap-breast-reconstruction-complication-rate-in-previously-irradiated-internal-mammary-nodes
#12
Shirley Shechter, Ehud Arad, Amir Inbal, Or Friedman, Eyal Gur, Yoav Barnea
BACKGROUND:  Postmastectomy radiation therapy (PMRT) is a widely accepted treatment for locally advanced breast cancer. Some patients require additional boost radiation to the internal mammary nodes as the part of regional nodal irradiation (RNI). Delayed breast reconstruction with an autologous free flap using the internal mammary vessels for microvascular flap anastomosis is a common practice for these patients. The aim of our study was to evaluate the effect of RNI on autologous microvascular breast reconstruction...
April 19, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29649076/pharmacokinetics-of-tenofovir-alafenamide-when-co-administered-with-other-hiv-antiretrovirals
#13
Rebecca Begley, Moupali Das, Lijie Zhong, John Ling, Brian P Kearney, Joseph M Custodio
BACKGROUND: Tenofovir alafenamide (TAF), a prodrug of the nucleotide analogue tenofovir (TFV), is an antiretroviral (ARV) agent approved either as a complete regimen (elvitegravir/cobicistat/emtricitabine (F)/tenofovir alafenamide (TAF), rilpivirine/F/TAF, bictegravir/F/TAF), or for use with other ARVs (F/TAF), for treatment of HIV. TAF is a substrate of P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP) transporters. Disposition of TAF may be altered by co-medications that can inhibit or induce P-gp or BCRP transporters...
April 10, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29623550/evaluation-of-adaptive-radiotherapy-art-by-use-of-replanning-the-tumor-bed-boost-with-repeated-computed-tomography-ct-simulation-after-whole-breast-irradiation-wbi-for-breast-cancer-patients-having-clinically-evident-seroma
#14
Omer Sager, Ferrat Dincoglan, Bora Uysal, Selcuk Demiral, Hakan Gamsiz, Yelda Elcim, Esin Gundem, Bahar Dirican, Murat Beyzadeoglu
PURPOSE: The aim of this study is to evaluate adaptive radiotherapy (ART) by use of replanning the tumor bed boost with repeated computed tomography (CT) simulation after whole breast irradiation (WBI) for breast cancer patients having clinically evident seroma. MATERIALS AND METHODS: Forty-eight patients with clinically evident seroma at the time of planning CT simulation for WBI were included. Two RT treatment plannings were generated for each patient based on the initial CT simulation and tumor bed boost CT simulation to assess seroma and boost target volume (BTV) changes during WBI...
April 5, 2018: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29616366/de-escalation-of-breast-radiotherapy-after-conserving-surgery-in-low-risk-early-breast-cancer-patients
#15
REVIEW
Pierfrancesco Franco, Giuseppe Carlo Iorio, Sara Bartoncini, Mario Airoldi, Corrado De Sanctis, Isabella Castellano, Umberto Ricardi
The reduction in the burden related to treatment is becoming more and more important in modern oncology. Radiation therapy is a mainstay option in the postoperative setting for early breast cancer patients after breast-conserving surgery. Nowadays, different options are available to de-escalate radiotherapy in this scenario such as the use of hypofractionated whole-breast radiation, the selective delivery of the boost dose to the lumpectomy cavity, the introduction of accelerated partial breast irradiation and the omission of treatment in appropriately selected patients with low-risk features...
April 3, 2018: Medical Oncology
https://www.readbyqxmd.com/read/29574724/extremely-thin-layer-plastification-for-focused-ion-beam-scanning-electron-microscopy-an-improved-method-to-study-cell-surfaces-and-organelles-of-cultured-cells
#16
E G VAN Donselaar, B Dorresteijn, D Popov-Čeleketić, W J VAN DE Wetering, T C Verrips, T Boekhout, C T W M Schneijdenberg, A T Xenaki, T P VAN DER Krift, W H Müller
Since the recent boost in the usage of electron microscopy in life-science research, there is a great need for new methods. Recently minimal resin embedding methods have been successfully introduced in the sample preparation for focused-ion beam scanning electron microscopy (FIB-SEM). In these methods several possibilities are given to remove as much resin as possible from the surface of cultured cells or multicellular organisms. Here we introduce an alternative way in the minimal resin embedding method to remove excess of resin from two widely different cell types by the use of Mascotte filter paper...
March 25, 2018: Journal of Microscopy
https://www.readbyqxmd.com/read/29568382/prolonged-in-vivo-expression-and-anti-tumor-response-of-dna-based-anti-her2-antibodies
#17
Kevin Hollevoet, Elien De Smidt, Nick Geukens, Paul Declerck
Antibody gene transfer presents an appealing alternative to conventional antibody protein therapy. This pre-clinical study evaluates the impact of various parameters on the pharmacokinetics and efficacy of in vivo expressed DNA-based anti-HER2 monoclonal antibodies (mAbs), newly engineered and delivered via intramuscular electrotransfer in mice. Plasma concentrations of trastuzumab and 4D5, its murine IgG1 equivalent, peaked on average between 1-15 µg/ml, depending on the administration and configuration of the encoding plasmid DNA (pDNA)...
March 2, 2018: Oncotarget
https://www.readbyqxmd.com/read/29558281/concurrent-veliparib-with-chest-wall-and-nodal-radiotherapy-in-patients-with-inflammatory-or-locoregionally-recurrent-breast-cancer-the-tbcrc-024-phase-i-multicenter-study
#18
Reshma Jagsi, Kent A Griffith, Jennifer R Bellon, Wendy A Woodward, Janet K Horton, Alice Ho, Felix Y Feng, Corey Speers, Beth Overmoyer, Michael Sabel, Anne F Schott, Lori Pierce
Purpose Locoregional control for inflammatory breast cancers and chest wall recurrences is suboptimal, which has motivated interest in radiosensitization to intensify therapy. Preclinical studies have suggested a favorable therapeutic index when poly (ADP-ribose) polymerase inhibitors are used as radiosensitizers; clinical investigation is necessary to establish appropriate dosing and confirm safety. Patients and Methods We conducted a multi-institutional phase I study of veliparib and concurrent radiotherapy (RT) to the chest wall and regional lymph nodes in 30 patients with inflammatory or locally recurrent breast cancer after complete surgical resection...
May 1, 2018: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/29556317/tumor-bed-radiotherapy-in-women-following-breast-conserving-surgery-for-breast-cancer-safety-margin-with-without-image-guidance
#19
Ales Hlavka, Jaroslav Vanasek, Karel Odrazka, Jan Stuk, Martin Dolezel, Vit Ulrych, Martina Vitkova, Jiri Mynarik, Iveta Kolarova, Zdenka Vilasova
Image guided radiation therapy (IGRT) enables the achievement of higher precision in radiation delivery, a reduction in safety margins and a reduced risk of toxicity in healthy tissues. The present study investigated the magnitude of safety margins for the radiation boost setup on skin marks or metal clips implanted into the tumor bed during breast cancer surgery. One hundred eighty-four patients after breast conserving surgery with implanted metal clips into tumor bed were analyzed. The present study investigated the difference in safety margin required for the treatment setup on skin marks and metal clips...
April 2018: Oncology Letters
https://www.readbyqxmd.com/read/29545124/radiation-therapy-for-the-whole-breast-executive-summary-of-an-american-society-for-radiation-oncology-astro-evidence-based-guideline
#20
Benjamin D Smith, Jennifer R Bellon, Rachel Blitzblau, Gary Freedman, Bruce Haffty, Carol Hahn, Francine Halberg, Karen Hoffman, Kathleen Horst, Jean Moran, Caroline Patton, Jane Perlmutter, Laura Warren, Timothy Whelan, Jean L Wright, Reshma Jagsi
INTRODUCTION: The purpose of this guideline is to offer recommendations on fractionation for whole breast irradiation (WBI) with or without a tumor bed boost and guidance on treatment planning and delivery. METHODS AND MATERIALS: The American Society for Radiation Oncology (ASTRO) convened a task force to address 5 key questions focused on dose-fractionation for WBI, indications and dose-fractionation for tumor bed boost, and treatment planning techniques for WBI and tumor bed boost...
May 2018: Practical Radiation Oncology
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