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https://www.readbyqxmd.com/read/27895679/the-impact-of-body-mass-index-on-dosimetric-quality-in-low-dose-rate-prostate-brachytherapy
#1
Michelle I Echevarria, Arash O Naghavi, Puja S Venkat, Yazan A Abuodeh, Carlos Chevere, Kosj Yamoah
PURPOSE: Low-dose-rate (LDR) brachytherapy has been established as an effective and safe treatment option for men with low and intermediate risk prostate cancer. In this retrospective analysis, we sought to study the effect of body mass index (BMI) on post-implant dosimetric quality. MATERIAL AND METHODS: After institutional approval, records of patients with non-metastatic prostate cancer treated in Puerto Rico with LDR brachytherapy during 2008-2013 were reviewed...
October 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27867323/low-dose-rate-irradiation-for-1-hour-induces-protection-against-lethal-radiation-doses-but-does-not-affect-life-span-of-dba-2-mice
#2
Nina Frederike Jeppesen Edin, Čestmír Altaner, Veronika Altanerova, Peter Ebbesen, Erik O Pettersen
Prior findings showed that serum from DBA/2 mice that had been given whole-body irradiation for 1 hour at a low dose rate (LDR) of 30 cGy/h induced protection against radiation in reporter cells by a mechanism depending on transforming growth factor β3 and inducible nitric oxide synthase activity. In the present study, the effect of the 1 hour of LDR irradiation on the response of the preirradiated mice to a subsequent lethal dose and on the life span is examined. These DBA/2 mice were prime irradiated for 1 hour at 30 cGy/h...
October 2016: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/27864278/integrative-analysis-for-the-role-of-long-non-coding-rnas-in-radiation-induced-mouse-thymocytes-responses
#3
Hui Gao, Zhuo Dong, Wei Wei, Lihong Shao, Linlin Jin, Yahui Lv, Gang Zhao, Shunzi Jin
Long non-coding RNAs (lncRNAs) are a critical class of regulatory molecules involved in a variety of biological functions; however, their role in immune cells response to radiation is unknown. Therefore, in this study we used integrative analysis to determine the expression profile of lncRNAs in mouse thymocytes and the potential functions of lncRNAs in response to radiation. Microarray data profiling indicated that 53 lncRNAs (36 up-regulated and 17 down-regulated) and 74 coding genes (39 up-regulated and 35 down-regulated) were highly differentially expressed in the high dose radiation (HDR) group compared with the control group...
November 17, 2016: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/27853677/reduced-graphene-oxide-decorated-with-gold-nanoparticle-as-signal-amplification-element-on-ultra-sensitive-electrochemiluminescence-determination-of-caspase-3-activity-and-apoptosis-using-peptide-based-biosensor
#4
Balal Khalilzadeh, Nasrin Shadjou, Hadi Afsharan, Morteza Eskandani, Hojjatollah Nozad Charoudeh, Mohammad-Reza Rashidi
Introduction: Growing demands for ultrasensitive biosensing have led to the development of numerous signal amplification strategies. In this report, a novel electrochemiluminescence (ECL) method was developed for the detection and determination of caspase-3 activity based on reduced graphene oxide sheets decorated by gold nanoparticles as signal amplification element and horseradish peroxidase enzyme (HRP) as ECL intensity enhancing agent. Methods: The ECL intensity of the luminol was improved by using the streptavidin coated magnetic beads and HRP in the presence of hydrogen peroxide...
2016: BioImpacts: BI
https://www.readbyqxmd.com/read/27814981/hemi-gland-focal-low-dose-rate-prostate-brachytherapy-an-analysis-of-dosimetric-outcomes
#5
Robert Laing, Adrian Franklin, Jennifer Uribe, Alex Horton, Santiago Uribe-Lewis, Stephen Langley
BACKGROUND AND PURPOSE: Advances in magnetic resonance imaging (MRI) and prostate sampling enable early identification of men with low to intermediate risk prostate cancer who are candidates for focal therapies that minimise side effects. We report dosimetry data from a pilot study evaluating the effectiveness of hemi-gland low dose rate (HG-LDR) brachytherapy as a focal therapy approach to control unilateral localised disease. MATERIAL AND METHODS: Twenty-two men underwent HG-LDR brachytherapy...
November 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27806619/use-of-novel-thermobrachytherapy-seeds-for-realistic-prostate-seed-implant-treatments
#6
Gregory Warrell, Diana Shvydka, E Ishmael Parsai
PURPOSE: A practical means of delivering both therapeutic radiation and hyperthermia to a deep-seated target has been identified in the literature as highly desirable, provided it is capable of generating sufficient temperatures over the defined target volume. The authors present continued development of a dual-modality thermobrachytherapy (TB) seed, investigating its capabilities in delivering prescribed hyperthermia to realistic deep-seated targets. METHODS: The TB seed is based on the ubiquitous low dose-rate (LDR) brachytherapy permanent implant...
November 2016: Medical Physics
https://www.readbyqxmd.com/read/27793447/conservative-surgery-with-combined-high-dose-rate-brachytherapy-for-patients-suffering-from-genitourinary-and-perianal-rhabdomyosarcoma
#7
Jörg Fuchs, Frank Paulsen, Martin Bleif, Ulf Lamprecht, Nicola Weidner, Daniel Zips, Felix Neunhoeffer, Guido Seitz
BACKGROUND AND PURPOSE: Outcome of patients with genitourinary rhabdomyosarcoma has been improved in the past, but organ preservation rates are too low. Conservative surgery with LDR-brachytherapy has been advocated, but LDR-brachytherapy is often not available. We wanted to establish a novel treatment modality combining HDR-brachytherapy and conservative surgery. MATERIAL AND METHODS: We performed an organ preserving tumor resection with intraoperative placement of brachytherapy tubes...
November 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27783031/association-of-mthfr-slc19a1-genetic-polymorphism-serum-folate-vitamin-b12-and-hcy-status-with-cognitive-functions-in-chinese-adults
#8
Can Cai, Rong Xiao, Nicholas Van Halm-Lutterodt, Jie Zhen, Xiaochen Huang, Yao Xu, Shuying Chen, Linhong Yuan
BACKGROUND/AIM: Studies have indicated a relationship between either gene polymorphism or in vivo B vitamins' nutritional status with cognition in the elderly. However, the combined effects of MTHFR and SLC19A1gene polymorphism with serum folate and vitamin B12 levels on cognition in Chinese adult population remain unclear. METHODS: Demographic information of 426 Chinese adults aged from 55 to 90 were collected by a well designed self-administered questionnaire...
October 24, 2016: Nutrients
https://www.readbyqxmd.com/read/27780694/stereotactic-ablative-radiotherapy-versus-low-dose-rate-brachytherapy-or-external-beam-radiotherapy-propensity-score-matched-analyses-of-canadian-data
#9
A Loblaw, T Pickles, J Crook, A-G Martin, E Vigneault, L Souhami, F Cury, J Morris, C Catton, H Lukka, P Cheung, P Sethukavalan, A Warner, Y Yang, G Rodrigues
AIMS: To compare biochemical failure-free survival (BFFS) and overall survival for prostate cancer treated with stereotactic ablative radiotherapy (SABR), low dose rate (LDR) brachytherapy or external beam radiotherapy (EBRT) using a large Canadian multi-institutional database. MATERIALS AND METHODS: Patients with low risk localised prostate cancer treated with SABR, LDR or EBRT and no androgen deprivation therapy were selected. Propensity score matching was used to create two sets of matched cohorts with LDR and EBRT serving as control groups...
October 22, 2016: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/27754559/highly-multiplex-and-sensitive-snp-genotyping-method-using-a-three-color-fluorescence-labeled-ligase-detection-reaction-coupled-with-conformation-sensitive-ce
#10
Woong Choi, Gyoo Yeol Jung
For the development of clinically useful genotyping methods for single nucleotide polymorphisms (SNPs), accuracy, simplicity, sensitivity, and cost-effectiveness are the most important criteria. Among the methods currently being developed for SNP genotyping technology, the ligation-dependent method is considered the simplest for clinical diagnosis. However, sensitivity is not guaranteed by the ligation reaction alone, and analysis of multiple targets is limited by the detection method. Although CE is an attractive alternative to error-prone hybridization-based detection, the multiplex assay process is complicated because of the size-based DNA separation principle...
October 18, 2016: Electrophoresis
https://www.readbyqxmd.com/read/27751353/association-of-programmed-death-1-polymorphisms-with-the-risk-and-prognosis-of-esophageal-squamous-cell-carcinoma
#11
Rong-Miao Zhou, Yan Li, Na Wang, Xi Huang, Shi-Ru Cao, Bao-En Shan
Programmed death-1 (PD-1) is an immunoinhibitory receptor belonging to the CD28 family. This study was designed to investigate the association of PD-1 rs36084323:A>G, rs2227981:C>T, rs2227982:C>T and rs10204525:A>G single nucleotide polymorphisms (SNPs) with the risk and prognosis of esophageal squamous cell carcinoma (ESCC) in a high-incidence population from Northern China. These four SNPs were genotyped by polymerase chain reaction ligase detection reaction (PCR-LDR) method in 584 ESCC patients and 585 healthy controls...
September 2016: Cancer Genetics
https://www.readbyqxmd.com/read/27729739/rhubarb-extract-partially-improves-mucosal-integrity-in-chemotherapy-induced-intestinal-mucositis
#12
Juliana E Bajic, Georgina L Eden, Lorrinne S Lampton, Ker Y Cheah, Kerry A Lymn, Jinxin V Pei, Andrea J Yool, Gordon S Howarth
AIM: To investigate the effects of orally gavaged aqueous rhubarb extract (RE) on 5-fluorouracil (5-FU)-induced intestinal mucositis in rats. METHODS: Female Dark Agouti rats (n = 8/group) were gavaged daily (1 mL) with water, high-dose RE (HDR; 200 mg/kg) or low-dose RE (LDR; 20mg/kg) for eight days. Intestinal mucositis was induced (day 5) with 5-FU (150 mg/kg) via intraperitoneal injection. Intestinal tissue samples were collected for myeloperoxidase (MPO) activity and histological examination...
October 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27720202/time-driven-activity-based-costing-of-low-dose-rate-and-high-dose-rate-brachytherapy-for-low-risk-prostate-cancer
#13
Annette M Ilg, Aaron A Laviana, Mitchell Kamrava, Darlene Veruttipong, Michael Steinberg, Sang-June Park, Michael A Burke, Douglas Niedzwiecki, Patrick A Kupelian, Christopher Saigal
PURPOSE: Cost estimates through traditional hospital accounting systems are often arbitrary and ambiguous. We used time-driven activity-based costing (TDABC) to determine the true cost of low-dose-rate (LDR) and high-dose-rate (HDR) brachytherapy for prostate cancer and demonstrate opportunities for cost containment at an academic referral center. METHODS AND MATERIALS: We implemented TDABC for patients treated with I-125, preplanned LDR and computed tomography based HDR brachytherapy with two implants from initial consultation through 12-month followup...
October 3, 2016: Brachytherapy
https://www.readbyqxmd.com/read/27708248/distinct-biological-effects-of-low-dose-radiation-on-normal-and-cancerous-human-lung-cells-are-mediated-by-atm-signaling
#14
Guozi Yang, Dehai Yu, Wei Li, Yuguang Zhao, Xue Wen, Xinyue Liang, Xiaoying Zhang, Lei Zhou, Jifan Hu, Chao Niu, Huimin Tian, Fujun Han, Xiao Chen, Lihua Dong, Lu Cai, Jiuwei Cui
Low-dose radiation (LDR) induces hormesis and adaptive response in normal cells but not in cancer cells, suggesting its potential protection of normal tissue against damage induced by conventional radiotherapy. However, the underlying mechanisms are not well established. We addressed this in the present study by examining the role of the ataxia telangiectasia mutated (ATM) signaling pathway in response to LDR using A549 human lung adenocarcinoma cells and HBE135-E6E7 (HBE) normal lung epithelial cells. We found that LDR-activated ATM was the initiating event in hormesis and adaptive response to LDR in HBE cells...
September 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/27694185/the-influence-of-nature-stimulus-in-enhancing-the-birth-experience
#15
Rehab Aburas, Debajyoti Pati, Robert Casanova, Nicole Gilinsky Adams
The physical environment is one of the factors that affect women's experience of labor. The basics of the childbirth process have not changed since the beginning of human existence; however, the environment in which women today give birth has changed significantly. Incorporating design elements and strategies that calm and reduce negative emotions may create positive experiences for women in labor. The purpose of this study was to examine the impact of one such strategy, namely, the presentation of images of nature, on the labor and delivery experience...
September 30, 2016: HERD
https://www.readbyqxmd.com/read/27690264/measurement-of-fat-content-in-vertebral-marrow-using-a-modified-dixon-sequence-to-differentiate-benign-from-malignant-processes
#16
Hye Jin Yoo, Sung Hwan Hong, Dong Hyun Kim, Ja-Young Choi, Hee Dong Chae, Bo Mi Jeong, Joong Mo Ahn, Heung Sik Kang
PURPOSE: To determine whether fat-signal-fraction (FF) map using a modified Dixon sequence could help differentiate benign from malignant bone lesions. MATERIALS AND METHODS: Spine magnetic resonance images (MRIs) of 120 consecutive patients were studied by using a 3T MRI with standard T1 -weighted image (T1 WI) and modified-Dixon sequence for FF measurement. There were three groups: a control group (n = 51) with normal vertebrae; a benign group (n = 40) with focal red marrow deposition, Schmorl's nodes, benign compression fracture, or Modic type 1 endplate degeneration; a malignant group (n = 29) with spinal malignancies...
September 30, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27685123/clinical-experience-with-planning-quality-assurance-and-delivery-of-burst-mode-modulated-arc-therapy
#17
Kristofer Kainz, Douglas Prah, Ergun Ahunbay, X Allen Li
"Burst-mode" modulated arc therapy (hereafter referred to as "mARC") is a form of volumetric-modulated arc therapy characterized by variable gantry rotation speed, static MLCs while the radiation beam is on, and MLC repositioning while the beam is off. We present our clinical experience with the planning techniques and plan quality assurance measurements of mARC delivery. Clinical mARC plans for five representative cases (prostate, low-dose-rate brain, brain with partial-arc vertex fields, pancreas, and liver SBRT) were generated using a Monte Carlo-based treatment planning system...
2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27664022/different-effects-of-blue-and-red-light-emitting-diodes-on-antioxidant-responses-in-the-liver-and-ovary-of-zebrafish-danio-rerio
#18
Shuang-Shuang Yuan, Huan-Zhi Xu, Li-Qin Liu, Jia-Lang Zheng
The present study assessed the effects of a white fluorescent bulb (the control) and two different light-emitting diodes (blue LEDs, LDB; red, LDR) on growth, morphology, and oxidative stress in the liver and ovary of zebrafish for 5 weeks. Growth maintained relatively constant under LDB condition, but was reduced under LDR condition. In the liver, hepatosomatic index (HSI) and protein carbonylation (PC) increased under LDR condition, whereas lipid peroxidation (LPO) declined and HSI remained unchanged under LDB condition...
September 23, 2016: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/27662210/il6-174-g-c-polymorphism-rs1800795-association-with-late-effects-of-low-dose-radiation-exposure-in-the-portuguese-tinea-capitis-cohort
#19
Paula Boaventura, Cecília Durães, Adélia Mendes, Natália Rios Costa, Inês Chora, Sara Ferreira, Emanuel Araújo, Pedro Lopes, Gilberto Rosa, Pedro Marques, Paulo Bettencourt, Inês Oliveira, Francisco Costa, Isabel Ramos, Maria José Teles, João Tiago Guimarães, Manuel Sobrinho-Simões, Paula Soares
Head and neck cancers, and cardiovascular disease have been described as late effects of low dose radiation (LDR) exposure, namely in tinea capitis cohorts. In addition to radiation dose, gender and younger age at exposure, the genetic background might be involved in the susceptibility to LDR late effects. The -174 G>C (rs1800795) SNP in IL6 has been associated with cancer and cardiovascular disease, nevertheless this association is still controversial. We assessed the association of the IL6-174 G>C SNP with LDR effects such as thyroid carcinoma, basal cell carcinoma and carotid atherosclerosis in the Portuguese tinea capitis cohort...
2016: PloS One
https://www.readbyqxmd.com/read/27648084/neither-high-dose-nor-low-dose-brachytherapy-increases-flap-morbidity-in-salvage-treatment-of-recurrent-head-and-neck-cancer
#20
Peter W Henderson, David I Kutler, Bhupesh Parashar, David M Otterburn, Marc A Cohen, Jason A Spector
PURPOSE: While brachytherapy is often used concurrently with flap reconstruction following surgical ablation for head and neck cancer, it remains unclear whether it increases morbidity in the particularly high risk subset of patients undergoing salvage treatment for recurrent head and neck cancer (RH&NC). MATERIAL AND METHODS: A retrospective chart review was undertaken that evaluated patients with RH&NC who underwent flap coverage after surgical re-resection and concomitant brachytherapy...
August 2016: Journal of Contemporary Brachytherapy
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