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https://www.readbyqxmd.com/read/28728302/-clinical-efficacy-of-ladder-neoadjuvant-therapy-in-treatment-of-advanced-mid-low-rectal-cancer
#1
Y X Zhang, H B Wang, Y J Lu, H Y Liu
Objective: To explore the clinical efficacy of ladder neoadjuvant therapy in treatment of advanced mid-low rectal cancer. Methods: We performed a retrospective study of one hundred and eighty mid and low rectal cancer patients who underwent ladder neoadjuvant therapy(neoadjuvant chemotherapy followed by surgery if neoadjuvant chemotherapy was effective; neoadjuvant chemotherapy followed by neoadjuvant chemoradiotherapy if neoadjuvant chemotherapy was ineffective)(n=90) or neoadjuvant chemoradiotherapy (n=90)...
July 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28727277/high-dose-palliative-radiotherapy-for-malignant-pleural-mesothelioma
#2
Farshad Foroudi, Jennifer G Smith, Faye Putt, Morikatsu Wada
INTRODUCTION: High-dose radiotherapy to the hemithorax for patients with malignant pleural mesothelioma is a controversial treatment. Between 2003 and 2013 our institution had a policy of giving hemithoracic radiotherapy to at least 45 Gy. This retrospective study reports survival, progression and toxicity associated with this policy. METHODS: Seventy-one patients with pleural mesothelioma were irradiated with doses of 45-60 Gy. Conformal radiotherapy (3D-CRT) to the lower hemithorax was used for 17 and intensity-modulated radiotherapy (IMRT) to the whole hemithorax for 54 patients...
July 20, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28726915/oleuropein-represses-the-radiation-resistance-of-ovarian-cancer-by-inhibiting-hypoxia-and-microrna-299-targetted-heparanase-expression
#3
Yubai Xing, Dawei Cui, Shun Wang, Pingping Wang, Xiaojing Xing, Hui Li
Radiotherapy in ovarian cancer frequently invokes resistance; this severely compromises its therapeutic effect and results in poor clinical prognosis. How to overcome the acquired resistance and re-sensitize tumors to radiation is the central question in this clinical setting. Cancer cell survival was evaluated using a clonogenic assay. The microRNA expression profile was analyzed using a microarray. Transcript expression was determined using real time PCR. The expression of protein was determined by immunoblotting...
July 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28726687/a-new-sparse-optimization-scheme-for-simultaneous-beam-angle-and-fluence-map-optimization-in-radiotherapy-planning
#4
Hongcheng Liu, Peng Dong, Lei Xing
[Formula: see text]-minimization-based sparse optimization was employed to solve the beam angle optimization (BAO) in intensity-modulated radiation therapy (IMRT) planning. The technique approximates the exact BAO formulation with efficiently computable convex surrogates, leading to plans that are inferior to those attainable with recently proposed gradient-based greedy schemes. In this paper, we alleviate/reduce the nontrivial inconsistencies between the [Formula: see text]-based formulations and the exact BAO model by proposing a new sparse optimization framework based on the most recent developments in group variable selection...
July 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28725520/mucosal-thickening-occurs-in-contralateral-paranasal-sinuses-following-sinonasal-malignancy-treatment
#5
Alice Z Maxfield, Kyle J Chambers, Ahmad R Sedaghat, Derrick T Lin, Stacey T Gray
Objective  To investigate the incidence and degree of contralateral sinus disease following treatment of sinonasal malignancy (SNM) using radiological findings as an outcome measure. Study Design  Retrospective case series. Setting  Tertiary referral academic center. Participants  Patients with SNM treated with surgical and adjuvant radiotherapy with or without concurrent chemotherapy. Main Outcome Measures  Pre- and posttreatment computed tomography and magnetic resonance imaging scans, Lund-Mackay (LM) score, date of diagnosis, chemotherapy, and dosage of radiation therapy (RT)...
August 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28725344/complete-response-of-mediastinal-clear-cell-sarcoma-to-pembrolizumab-with-radiotherapy
#6
Samuel Marcrom, Jennifer F De Los Santos, Robert M Conry
BACKGROUND: Clear cell sarcoma (CCS) is a rare, aggressive soft tissue sarcoma thought to derive from neural crest and characterized by a 12;22 translocation. The resulting fusion protein directly activates expression of the melanocyte master transcription factor and drives the same down-stream pathways in CCS and melanoma leading to significant clinical parallels between these malignancies. Striking success of immune checkpoint blockade in melanoma has promoted interest in immunotherapy of CCS...
2017: Clinical Sarcoma Research
https://www.readbyqxmd.com/read/28725254/interacts-interventional-radiotherapy-active-teaching-school-guidelines-for-quality-assurance-in-choroidal-melanoma-interventional-radiotherapy-brachytherapy-procedures
#7
REVIEW
Luca Tagliaferri, Monica Maria Pagliara, Luca Boldrini, Carmela Grazia Caputo, Luigi Azario, Maura Campitelli, Maria Antonietta Gambacorta, Daniela Smaniotto, Vincenzo Frascino, Francesco Deodato, Alessio Giuseppe Morganti, György Kovács, Vincenzo Valentini, Maria Antonietta Blasi
Eye plaque brachytherapy represents a safe and effective therapeutic approach for choroidal melanoma, combining clinical outcomes with an eye and visual preservation. As it represents a complex procedure, a specific quality assurance program is strongly suggested to improve patients and operators safety, and to reduce possible complications linked to surgical procedure and radiation exposure. The aim of this paper is to describe the INTERACTS (Interventional Radiotherapy Active Teaching School) guidelines for quality assurance in choroidal melanoma interventional radiotherapy (brachytherapy) used in our institution...
June 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28725250/adjuvant-radiotherapy-with-brachytherapy-boost-in-soft-tissue-sarcomas
#8
Annalisa Cortesi, Andrea Galuppi, Rezarta Frakulli, Alessandra Arcelli, Fabrizio Romani, Gian Carlo Mattiucci, Giuseppe Bianchi, Stefano Ferrari, Andrea Ferraro, Andrea Farioli, Marco Gambarotti, Alberto Righi, Gabriella Macchia, Francesco Deodato, Savino Cilla, Milly Buwenge, Vincenzo Valentini, Alessio Giuseppe Morganti, Davide Donati, Silvia Cammelli
PURPOSE: The standard primary treatment for soft tissue sarcoma (STS) is a wide surgical resection, preceded or followed by radiotherapy. Purpose of this retrospective study was to assess the efficacy of perioperative brachytherapy (BRT) plus postoperative external beam radiation therapy (EBRT) in patients with intermediate-high risk STS. MATERIAL AND METHODS: BRT delivered dose was 20 Gy. External beam radiation therapy was delivered with 3D-technique using multiple beams...
June 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28725249/two-years-results-of-electronic-brachytherapy-for-basal-cell-carcinoma
#9
Rosa Ballester-Sánchez, Olga Pons-Llanas, Cristian Candela-Juan, Blanca de Unamuno-Bustos, Francisco Javier Celada-Alvarez, Alejandro Tormo-Mico, Jose Perez-Calatayud, Rafael Botella-Estrada
PURPOSE: The use of radiation therapy (RT) for non-melanoma skin cancer (NMSC) has been changing throughout the last century. Over the last decades, the use of radiotherapy has surged with the development of new techniques, applicators, and devices. In recent years, electronic brachytherapy (eBT) devices that use small x-ray sources have been introduced as alternative to radionuclide dependence. Nowadays, several devices have been incorporated, with a few series reported, and with a short follow-up, due to the recent introduction of these systems...
June 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28723894/cysteine-protease-cathepsin-b-mediates-radiation-induced-bystander-effects
#10
Yu Peng, Man Zhang, Lingjun Zheng, Qian Liang, Hanzeng Li, Jeng-Ting Chen, Hongyan Guo, Sawako Yoshina, Yu-Zen Chen, Xiang Zhao, Xiaoqi Wu, Bin Liu, Shohei Mitani, Jau-Song Yu, Ding Xue
The radiation-induced bystander effect (RIBE) refers to a unique process in which factors released by irradiated cells or tissues exert effects on other parts of the animal not exposed to radiation, causing genomic instability, stress responses and altered apoptosis or cell proliferation. Although RIBEs have important implications for radioprotection, radiation safety and radiotherapy, the molecular identities of RIBE factors and their mechanisms of action remain poorly understood. Here we use Caenorhabditis elegans as a model in which to study RIBEs, and identify the cysteine protease CPR-4, a homologue of human cathepsin B, as the first RIBE factor in nematodes, to our knowledge...
July 19, 2017: Nature
https://www.readbyqxmd.com/read/28723716/refining-the-management-of-patients-with-hepatocellular-carcinoma-integrating-11c-choline-pet-ct-scan-into-the-multidisciplinary-team-discussion
#11
Ezio Lanza, Matteo Donadon, Paolo Felisaz, Antonio Mimmo, Arturo Chiti, Guido Torzilli, Luca Balzarini, Egesta Lopci
OBJECTIVE: The aim of this study was to report the impact of C-choline PET/CT on the management of patients with hepatocellular carcinoma (HCC) and incorporate into a refined algorithm combining diagnostic imaging and multidisciplinary team (MDT) discussion. PATIENTS AND METHODS: From February 2010 to February 2016, the charts of all patients discussed in the liver MDT were revised. Suspected or confirmed HCC lesions or Barcelona Clinic Liver Cancer stages A, B or C with a C-choline PET/CT performed in our hospital were included in the analyses...
July 18, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28723274/identifying-voxels-at-risk-for-progression-in-glioblastoma-based-on-dosimetry-physiologic-and-metabolic-mri
#12
Mekhail Anwar, Annette M Molinaro, Olivier Morin, Susan M Chang, Daphne A Haas-Kogan, Sarah J Nelson, Janine M Lupo
Despite the longstanding role of radiation in cancer treatment and the presence of advanced, high-resolution imaging techniques, delineation of voxels at-risk for progression remains purely a geometric expansion of anatomic images, missing subclinical disease at risk for recurrence while treating potentially uninvolved tissue and increasing toxicity. This remains despite the modern ability to precisely shape radiation fields. A striking example of this is the treatment of glioblastoma, a highly infiltrative tumor that may benefit from accurate identification of subclinical disease...
July 19, 2017: Radiation Research
https://www.readbyqxmd.com/read/28723264/patterns-of-care-and-outcomes-with-the-addition-of-chemotherapy-to-radiation-therapy-for-stage-i-nasopharyngeal-cancer
#13
Vivek Verma, Jeffrey M Ryckman, Charles B Simone, Chi Lin
PURPOSE: The standard of care for stage I (T1N0) nasopharyngeal cancer (NPC) is definitive radiotherapy (RT). Given the phase III evidence supporting combined chemoradiotherapy (CRT) for stage II NPC, we investigated practice patterns and outcomes associated with administration of chemotherapy to RT alone for stage I NPC. METHODS: The National Cancer Data Base (NCDB) was queried for clinical T1N0 primary NPC cases (2004-2013) receiving curative-intent RT. Patients with unknown RT/chemotherapy status were excluded, as were benign/sarcomatous histologies and receipt of pharyngectomy...
July 19, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28722700/detection-of-bone-marrow-edema-pattern-with-dual-energy-computed-tomography-of-the-pig-mandible-treated-with-radiotherapy-and-surgery-compared-with-magnetic-resonance-imaging
#14
Lucas J Poort, Annika A R Stadler, Johan H B Ludlage, Frank J P Hoebers, Peter A W H Kessler, Alida A Postma
OBJECTIVE: The aim of the study was to investigate the accuracy of dual-energy computed tomography (DECT) compared with magnetic resonance (MR) imaging for the detection of edema of the mandible. MATERIALS AND METHODS: Fifteen adult Göttingen mini pigs received irradiation to the mandible with an equivalent dose of 0, 25, 50, or 70 Gy. Six months after irradiation, all animals underwent DECT and MR imaging of the mandible. Magnetic resonance short tau inversion recovery (STIR) was used for the grading of the bone marrow edema (0-3)...
July 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28722140/erythrocyte-membrane-enveloped-perfluorocarbon-as-nanoscale-artificial-red-blood-cells-to-relieve-tumor-hypoxia-and-enhance-cancer-radiotherapy
#15
Min Gao, Chao Liang, Xuejiao Song, Qian Chen, Qiutong Jin, Chao Wang, Zhuang Liu
Hypoxia, a common feature within many types of solid tumors, is known to be closely associated with limited efficacy for cancer therapies, including radiotherapy (RT) in which oxygen is essential to promote radiation-induced cell damage. Here, an artificial nanoscale red-blood-cell system is designed by encapsulating perfluorocarbon (PFC), a commonly used artificial blood substitute, within biocompatible poly(d,l-lactide-co-glycolide) (PLGA), obtaining PFC@PLGA nanoparticles, which are further coated with a red-blood-cell membrane (RBCM)...
July 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28720669/muc1-mediated-metabolic-alterations-regulate-response-to-radiotherapy-in-pancreatic-cancer
#16
Venugopal Gunda, Joshua J Souchek, Jaime Abrego, Surendra K Shukla, Gennifer D Goode, Enza Vernucci, Aneesha Dasgupta, Nina CHaika, Ryan J King, Sicong Li, Shuo Wang, Fang Yu, Tadayoshi Bessho, Chi Lin, Pankaj K Singh
Purpose: MUC1, an oncogene overexpressed in multiple solid tumors including pancreatic cancer, reduces overall survival and imparts resistance to radiation and chemotherapies. We previously identified that MUC1 facilitates growth promoting metabolic alterations in pancreatic cancer cells. The present study investigates the role of MUC1-mediated metabolism in radiation resistance of pancreatic cancer by utilizing cell lines and in vivo models. <p>Experimental design: We used MUC1 knockdown and overexpressed cell line models for evaluating the role of MUC1-mediated metabolism in radiation resistance through in vitro cytotoxicity, clonogenicity, DNA damage response and metabolomic evaluations...
July 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28719715/long-term-recurrence-free-survival-after-an-unplanned-reduction-in-radiotherapy-for-hpv-positive-oropharyngeal-scc-two-cases-and-a-review-of-the-literature
#17
Jason Liu, David Goldenberg, Salah Almokadem, Henry Crist, Heath B Mackley
There is currently no clear distinction between the treatment of HPV-positive and HPV-negative oropharyngeal squamous cell carcinoma (OPSCC). HPV-positive OPSCC has been demonstrated to be more radiosensitive than its HPV-negative counterpart. Despite this, patients with HPV-positive OPSCC continue to receive a full dose of radiation (70 Gy) outside clinical trials. However, this high dose comes with considerable morbidities, including severe mucositis, dysphagia, and xerostomia. We describe the cases of 2 patients with HPV-positive OPSCC who received two cycles of high-dose cisplatin at 100 mg/m(2) on 3 separate days, along with concurrent radiotherapy at 50 Gy in 25 fractions for one and 46 Gy in 23 fractions for the other...
July 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28718993/role-of-fdg-pet-mri-fdg-pet-ct-and-dynamic-susceptibility-contrast-perfusion-mri-in-differentiating-radiation-necrosis-from-tumor-recurrence-in-glioblastomas
#18
Mojgan Hojjati, Chaitra Badve, Vasant Garg, Curtis Tatsuoka, Lisa Rogers, Andrew Sloan, Peter Faulhaber, Pablo R Ros, Leo J Wolansky
BACKGROUND AND PURPOSE: To compare the utility of quantitative PET/MRI, dynamic susceptibility contrast (DSC) perfusion MRI (pMRI), and PET/CT in differentiating radiation necrosis (RN) from tumor recurrence (TR) in patients with treated glioblastoma multiforme (GBM). METHODS: The study included 24 patients with GBM treated with surgery, radiotherapy, and temozolomide who presented with progression on imaging follow-up. All patients underwent PET/MRI and pMRI during a single examination...
July 18, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28718725/ellagic-acid-enhances-apoptotic-sensitivity-of-breast-cancer-cells-to-%C3%AE-radiation
#19
Vidhula Ahire, Amit Kumar, Kaushala Prasad Mishra, Gauri Kulkarni
Herbal polyphenols have gained increased significance because of the promises they hold in the prevention and treatment of cancer. There exists an enormous opportunity for the screening and valuation of natural dietary compounds in the development of an effective chemopreventive drug and radiosensitizer that may be of practical use for patients undergoing cancer therapy. This study describes the effect of the flavonoid ellagic acid (EA) on gamma-irradiated human breast cancer MCF-7 cells in vitro when administered alone or in combination with radiation...
July 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28718286/functionalized-selenium-nanosystem-as-radiation-sensitizer-of-125i-seeds-for-precise-cancer-therapy
#20
Yahui Yang, Qiang Xie, Zhennan Zhao, Lizhen He, Leung Chan, Yingxiang Liu, Yongle Chen, Mingjun Bai, Tao Pan, Yanni Qu, Long Ling, Tianfeng Chen
Although radiotherapy has been extensively applied in cancer treatment, external beam radiation therapy is still difficult to avoid damage to adjacent normal tissues in the process of delivering a sufficient radiation dose to the tumor sites of patients. To overcome this limitation, chemoradiotherapy, as a combination of chemotherapy and radiotherapy of radioactive seed, has been proposed to decrease the damage for tumor surrounding tissues and enhance the radiosensitivity of solid tumors. In the study, we designed and synthesized folic acid-conjugated selenium nanoparticles (FA@SeNPs) as cancer-targeting agent, which could be synergistically enhanced by the radioactive 125I seeds to realize anticancer efficacy and inhibited colony formation ability...
July 18, 2017: ACS Applied Materials & Interfaces
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