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Boron neutron capture therapy

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https://www.readbyqxmd.com/read/28427153/comparison-between-proton-boron-fusion-therapy-pbft-and-boron-neutron-capture-therapy-bnct-a-monte-carlo-study
#1
Joo-Young Jung, Do-Kun Yoon, Brendan Barraclough, Heui Chang Lee, Tae Suk Suh, Bo Lu
The aim of this study is to compare between proton boron fusion therapy (PBFT) and boron neutron capture therapy (BNCT) and to analyze dose escalation using a Monte Carlo simulation. We simulated a proton beam passing through the water with a boron uptake region (BUR) in MCNPX. To estimate the interaction between neutrons/protons and borons by the alpha particle, the simulation yielded with a variation of the center of the BUR location and proton energies. The variation and influence about the alpha particle were observed from the percent depth dose (PDD) and cross-plane dose profile of both the neutron and proton beams...
February 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417903/an-assessment-of-the-potential-use-of-bnnts-for-boron-neutron-capture-therapy
#2
Tiago H Ferreira, Marcelo C Miranda, Zildete Rocha, Alexandre S Leal, Dawidson A Gomes, Edesia M B Sousa
Currently, nanostructured compounds have been standing out for their optical, mechanical, and chemical features and for the possibilities of manipulation and regulation of complex biological processes. One of these compounds is boron nitride nanotubes (BNNTs), which are a nanostructured material analog to carbon nanotubes, but formed of nitrogen and boron atoms. BNNTs present high thermal stability along with high chemical inertia. Among biological applications, its biocompatibility, cellular uptake, and functionalization potential can be highlighted, in addition to its eased utilization due to its nanometric size and tumor cell internalization...
April 12, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28414991/modeling-the-detection-efficiency-of-an-hp-ge-detector-for-use-in-boron-neutron-capture-therapy
#3
Satoshi Nakamura, Akihisa Wakita, Masashi Ito, Hiroyuki Okamoto, Shie Nishioka, Kotaro Iijima, Kazuma Kobayashi, Teiji Nishio, Hiroshi Igaki, Jun Itami
The multi-foil method is commonly used to determine upon an energy spectrum of neutrons in boron neutron capture therapy. The method requires to measure the radioactivation of the foils. This study develops a simple modeling procedure of a high-purity Ge detector, which is used to measure the radioactivation, in order to calculate the detection efficiency with GEANT4. By changing four parameters from their manufacturing specifications of the detector, the simulated detection efficiency is able to reproduce the actual detection efficiency...
April 2, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28406315/selective-boron-delivery-by-intra-arterial-injection-of-bsh-wow-emulsion-in-hepatic-cancer-model-for-neutron-capture-therapy
#4
Hironobu Yanagie, Novriana Dewi, Syushi Higashi, Ichiro Ikushima, Koji Seguchi, Ryoji Mizumachi, Yuji Murata, Yasuyuki Morishita, Atsuko Shinohara, Shoji Mikado, Nakahiro Yasuda, Mitsuteru Fujihara, Yuriko Sakurai, Kikue Mouri, Masashi Yanagawa, Tomoya Iizuka, Minoru Suzuki, Yoshinori Sakurai, Shin-Ichiro Masunaga, Hiroki Tanaka, Takehisa Matsukawa, Kazuhito Yokoyama, Takashi Fujino, Koichi Ogura, Yasumasa Nonaka, Hirotaka Sugiyama, Tetsuya Kajiyama, Sho Yui, Ryohei Nishimura, Koji Ono, Sinichi Takamoto, Jun Nakajima, Minoru Ono, Masazumi Eriguchi, Kenichiro Hasumi, Hiroyuki Takahashi
OBJECTIVE: Boron neutron-capture therapy (BNCT) has been used to inhibit the growth of various types of cancers. In this study, we developed a (10)BSH-entrapped water-in-oil-in-water (WOW) emulsion, evaluated it as a selective boron carrier for the possible application of BNCT in hepatocellular carcinoma (HCC) treatment. METHODS: We prepared the (10)BSH-entrapped WOW emulsion using double emulsification technique and then evaluated the delivery efficacy by performing biodistribution experiment on VX-2 rabbit hepatic tumour model with comparison to iodized poppy-seed oil (IPSO) mix conventional emulsion...
April 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28402271/cyclic-rgdyc-functionalized-liposomes-for-dual-targeting-of-tumor-vasculature-and-cancer-cells-in-glioblastoma-an-in-vitro-boron-neutron-capture-therapy-study
#5
Weirong Kang, Darren Svirskis, Vijayalekshmi Sarojini, Ailsa L McGregor, Joseph Bevitt, Zimei Wu
The efficacy of boron neutron capture therapy depends on the selective delivery of 10B to the target. Integrins αvβ3 are transmembrane receptors over-expressed in both glioblastoma cells and its neovasculature. In this study, a novel approach to dual-target glioblastoma vasculature and tumor cells was investigated. Liposomes (124 nm) were conjugated with a avβ3 ligand, cyclic arginine-glycine-aspartic acid-tyrosine-cysteine peptide (c(RGDyC)-LP) (1% molar ratio) through thiol-maleimide coupling. Expression of αvβ3 in glioblastoma cells (U87) and human umbilical vein endothelial cells (HUVEC), representing tumor angiogenesis, was determined using Western Blotting with other cells as references...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28373429/dna-double-strand-breaks-induced-byfractionated-neutron-beam-irradiation-for-boron-neutron-capture-therapy
#6
Yuko Kinashi, Natsuya Yokomizo, Sentaro Takahashi
AIM: To use the 53BP1 foci assay to detect DNA double-strand breaks induced by fractionated neutron beam irradiation of normal cells. MATERIALS AND METHODS: The Kyoto University Research Reactor heavy-water facility and gamma-ray irradiation system were used as experimental radiation sources. After fixation of Chinese Hamster Ovary cells with 3.6% formalin, immunofluorescence staining was performed. Number and size of foci were analyzed using ImageJ software. RESULTS: Fractionated neutron irradiation induced 25% fewer 53BP1 foci than single irradiation at the same dose...
April 2017: Anticancer Research
https://www.readbyqxmd.com/read/28365526/analysis-of-mcnp-simulated-gamma-spectra-of-cdte-detectors-for-boron-neutron-capture-therapy
#7
Alexander Winkler, Hanna Koivunoro, Sauli Savolainen
The next step in the boron neutron capture therapy (BNCT) is the real time imaging of the boron concentration in healthy and tumor tissue. Monte Carlo simulations are employed to predict the detector response required to realize single-photon emission computed tomography in BNCT, but have failed to correctly resemble measured data for cadmium telluride detectors. In this study we have tested the gamma production cross-section data tables of commonly used libraries in the Monte Carlo code MCNP in comparison to measurements...
March 27, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28351146/carborane-derivative-conjugated-with-gold-nanoclusters-for-target-cancer-cell-imaging
#8
Jianling Wang, Leifeng Chen, Jing Ye, Zhiyong Li, Hui Jiang, Hong Yan, Marina Yu Stogniy, Igor B Sivaev, Vladimir Iosifovich Bregadze, Xuemei Wang
Polyhedral borane derivatives has been utilized in the treatment of Boron Neuron Capture Therapy (BNCT) for brain glioma, and much attention has been paid to search good biocompatible boron-rich composites for the effective cancer BNCT therapy. In this study, we have exploited the possibility of the self-assembly of the gold nanoclusters with carborane amino derivatives (GNCs-CB) for the precise bioimaging of cancer cells and targeted delivery of the relevant carborane to the tumors. Our observations demonstrate that the GNCs-CB can readily realize the accurate tumor imaging and long-term accumulation in tumor sites by EPR effect and nanometer size effect, and thus efficiently implement tumor targeting delivery of carborane derivatives and facilitate the real-time fluorescent visualization monitoring of carborane targeted delivery process...
March 28, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28350469/synthesis-of-sugar-boronic-acid-derivatives-a-class-of-potential-agents-for-boron-neutron-capture-therapy
#9
Daniela Imperio, Erika Del Grosso, Silvia Fallarini, Grazia Lombardi, Luigi Panza
To date, sugar analogues that contain boronic acids as substitutes for hydroxyl groups are a class of compounds nearly unknown in the literature. The challenging synthesis of two sugar-boronic acid analogues is described, and data are retrieved on their solution behavior, stability, and toxicity. As these compounds were expected to mimic the behavior of carbohydrates, they were tested in regards to their future development as potential boron neutron capture therapy agents.
April 7, 2017: Organic Letters
https://www.readbyqxmd.com/read/28342380/optimization-of-the-compton-camera-for-measuring-prompt-gamma-rays-in-boron-neutron-capture-therapy
#10
Chun-Hui Gong, Xiao-Bin Tang, Di-Yun Shu, Hai-Yan Yu, Chang-Ran Geng
Optimization of the Compton camera for measuring prompt gamma rays (0.478MeV) emitted during boron neutron capture therapy (BNCT) was performed with Geant4. The parameters of the Compton camera were determined as follows: 3cm thick - 10cm wide scatter detector (Silicon), 10cm thick - 10cm wide absorber detector (Germanium), and 1cm distance between the scatter and absorber detectors. For a typical brain tumor treatment, the overall detection efficiency of the optimized Compton camera was approximately 0.1425% using the Snyder's head phantom with a sphere tumor (4cm diameter and ~1cm depth)...
March 19, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28336377/block-copolymer-boron-cluster-conjugate-for-effective-boron-neutron-capture-therapy-of-solid-tumors
#11
Peng Mi, Hironobu Yanagie, Novriana Dewi, Hung-Chi Yen, Xueying Liu, Minoru Suzuki, Yoshinori Sakurai, Koji Ono, Hiroyuki Takahashi, Horacio Cabral, Kazunori Kataoka, Nobuhiro Nishiyama
Boron neutron capture therapy is a promising tumor treatment method, though its wide application has been limited due to the poor tumor selectivity and intracellular delivery of (10)B-compounds. Here, block copolymer-boron cluster conjugate based on the clinically used sodium borocaptate (BSH) and poly(ethylene glycol)-b-poly(glutamic acid) copolymer have been developed for effectively penetrating tumor tissues and homogeneously delivering the boron clusters into cancer cells towards safe and efficient boron neutron capture therapy...
March 21, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28225126/carborane-layered-double-hydroxide-nanohybrids-for-potential-targeted-and-magnetically-targeted-bnct-applications
#12
Ahmet Nedim Ay, Hande Akar, Adnana Zaulet, Clara Viňas, Francesc Teixidor, Birgul Zumreoglu-Karan
Carborane-intercalated layered double hydroxide nanohybrids (CB-LDH) and a magnesium ferrite (MF) supported-CB-LDH core-shell nanocomposite (CB-LDH@MF) are reported. The preparation of nanohybrids were carried out by exchanging the interlayer nitrate groups of Mg-Al-NO3-LDH with monothiol-o-carborane (SCB), 1-methyl-2-carboxyl-o-carborane (MeCB), 1-phenyl-2-carboxyl-o-carborane (PhCB) and 1,12-dicarboxyl-p-carborane (COOHCB) molecules. A magnetic core-shell nanocomposite was further prepared by supporting the COOHCB-LDH nanohybrid on MF nanoparticles...
February 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28217982/theranostic-nanoparticles-loaded-with-imaging-probes-and-rubrocurcumin-for-combined-cancer-therapy-by-folate-receptor-targeting
#13
Diego Alberti, Nicoletta Protti, Morgane Franck, Rachele Stefania, Silva Bortolussi, Saverio Altieri, Annamaria Deagostino, Silvio Aime, Simonetta Geninatti Crich
The combination of different therapeutic modalities is a promising option to combat the recurrence of tumors. In this study, polylactic and polyglycolic acid nanoparticles were used for the simultaneous delivery of a boron-curcumin complex (RbCur) and an amphiphilic gadolinium complex into tumor cells with the aim of performing boron and gadolinium neutron capture therapy (NCT) in conjunction with the additional antiproliferative effects of curcumin. Furthermore, the use of Gd complexes allows magnetic resonance imaging (MRI) assessment of the amount of B and Gd internalized by tumor cells...
February 20, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28209015/boron-neutron-capture-therapy-a-literature-review
#14
REVIEW
Kavitaa Nedunchezhian, Nalini Aswath, Manigandan Thiruppathy, Sarumathi Thirugnanamurthy
Boron Neutron Capture Therapy (BNCT) is a radiation science which is emerging as a hopeful tool in treating cancer, by selectively concentrating boron compounds in tumour cells and then subjecting the tumour cells to epithermal neutron beam radiation. BNCT bestows upon the nuclear reaction that occurs when Boron-10, a stable isotope, is irradiated with low-energy thermal neutrons to yield α particles (Helium-4) and recoiling lithium-7 nuclei. A large number of 10 Boron (10B) atoms have to be localized on or within neoplastic cells for BNCT to be effective, and an adequate number of thermal neutrons have to be absorbed by the 10B atoms to maintain a lethal 10B (n, α) lithium-7 reaction...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205309/a-feasibility-study-of-a-deuterium-deuterium-neutron-generator-based-boron-neutron-capture-therapy-system-for-treatment-of-brain-tumors
#15
Mindy Hsieh, Yingzi Liu, Farshad Mostafaei, Jean M Poulson, Linda H Nie
PURPOSE: Boron neutron capture therapy (BNCT) is a binary treatment modality that uses high LET particles to achieve tumor cell killing. Deuterium-deuterium (DD) compact neutron generators have advantages over nuclear reactors and large accelerators as the BNCT neutron source, such as their compact size, low cost, and relatively easy installation. The purpose of this study is to design a beam shaping assembly (BSA) for a DD neutron generator and assess the potential of a DD-based BNCT system using Monte Carlo (MC) simulations...
February 2017: Medical Physics
https://www.readbyqxmd.com/read/28174492/boron-neutron-capture-therapy-for-malignant-melanoma-first-clinical-case-report-in-china
#16
Zhong Yong, Zewen Song, Yongmao Zhou, Tong Liu, Zizhu Zhang, Yanzhong Zhao, Yang Chen, Congjun Jin, Xiang Chen, Jianyun Lu, Rui Han, Pengzhou Li, Xulong Sun, Guohui Wang, Guangqing Shi, Shaihong Zhu
A phase I/II clinical trial for treating malignant melanoma by boron neutron capture therapy (BNCT) was designed to evaluate whether the world's first in-hospital neutron irradiator (IHNI) was qualified for BNCT. In this clinical trial planning to enroll 30 patients, the first case was treated on August 19, 2014. We present the protocol of this clinical trial, the treating procedure, and the clinical outcome of this first case. Only grade 2 acute radiation injury was observed during the first four weeks after BNCT and the injury healed after treatment...
December 2016: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/28121726/influence-of-neutron-sources-and-10b-concentration-on-boron-neutron-capture-therapy-for-shallow-and-deeper-non-small-cell-lung-cancer
#17
Haiyan Yu, Xiaobin Tang, Diyun Shu, Yuanhao Liu, Changran Geng, Chunhui Gong, Shuang Hang, Da Chen
Boron Neutron Capture Therapy (BNCT) is a radiotherapy that combines biological targeting and high Linear Energy Transfer (LET). It is considered a potential therapeutic approach for non-small cell lung cancer (NSCLC). It could avoid the inaccurate treatment caused by the lung motion during radiotherapy, because the dose deposition mainly depends on the boron localization and neutron source. Thus, B concentration and neutron sources are both principal factors of BNCT, and they play significant roles in the curative effect of BNCT for different cases...
March 2017: Health Physics
https://www.readbyqxmd.com/read/28114947/evaluation-of-a-novel-sodium-borocaptate-containing-unnatural-amino-acid-as-a-boron-delivery-agent-for-neutron-capture-therapy-of-the-f98-rat-glioma
#18
Gen Futamura, Shinji Kawabata, Naosuke Nonoguchi, Ryo Hiramatsu, Taichiro Toho, Hiroki Tanaka, Shin-Ichiro Masunaga, Yoshihide Hattori, Mitsunori Kirihata, Koji Ono, Toshihiko Kuroiwa, Shin-Ichi Miyatake
BACKGROUND: Boron neutron capture therapy (BNCT) is a unique particle radiation therapy based on the nuclear capture reactions in boron-10. We developed a novel boron-10 containing sodium borocaptate (BSH) derivative, 1-amino-3-fluorocyclobutane-1-carboxylic acid (ACBC)-BSH. ACBC is a tumor selective synthetic amino acid. The purpose of this study was to assess the biodistribution of ACBC-BSH and its therapeutic efficacy following Boron Neutron Capture Therapy (BNCT) of the F98 rat glioma...
January 23, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28103709/radiation-absorbed-dose-estimates-for-18f-bpa-pet
#19
Yuzuru Kono, Hiroaki Kurihara, Hiroshi Kawamoto, Naoko Yasui, Naoki Honda, Hiroshi Igaki, Jun Itami
Background Boron neutron capture therapy (BNCT) is a molecular radiation therapy approach based on the (10)B (n, α) (7)Li nuclear reaction in cancer cells. In BNCT, delivery of (10)B in the form of 4-borono-phenylalanine conjugated with fructose (BPA-fr) to the cancer cells is important. The PET tracer 4-borono-2-18F-fluoro-phenylalanine (FBPA) has been used to predict the accumulation of BPA-fr before BNCT. Purpose To determine the biodistribution and dosimetric parameters in 18F-BPA PET/CT studies. Material and Methods Human biokinetic data were obtained during clinical 18F-BPA PET studies between February and June 2015 at one institution...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28088230/relationship-between-the-uptake-of-18-f-borono-l-phenylalanine-and-l-methyl-11-c-methionine-in-head-and-neck-tumors-and-normal-organs
#20
Yoshiaki Watanabe, Hiroaki Kurihara, Jun Itami, Ryohei Sasaki, Yasuaki Arai, Kazuro Sugimura
BACKGROUND AND PURPOSE: The purpose of this study was to determine the distribution of 4-borono-2-(18)F-fluoro-phenylalanine ((18)F-BPA) and L-[methyl-(11)C] methionine ((11)C-Met) in normal organs and tumors and to evaluate the usefulness of (11)C-Met/PET in screening potential candidates for boron neutron capture therapy (BNCT). MATERIAL METHODS: Seven patients who had at least one histologically confirmed head and neck tumor were included in this study. They underwent both whole-body (18)F-BPA-PET/CT and (11)C-Met-PET/CT within a span of 6 months...
January 14, 2017: Radiation Oncology
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