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Boron neutron capture therapy

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https://www.readbyqxmd.com/read/29159536/physics-of-epi-thermal-boron-neutron-capture-therapy-epi-thermal-bnct
#1
REVIEW
Ryoichi Seki, Yushi Wakisaka, Nami Morimoto, Masaaki Takashina, Masahiko Koizumi, Hiroshi Toki, Mitsuhiro Fukuda
The physics of epi-thermal neutrons in the human body is discussed in the effort to clarify the nature of the unique radiologic properties of boron neutron capture therapy (BNCT). This discussion leads to the computational method of Monte Carlo simulation in BNCT. The method is discussed through two examples based on model phantoms. The physics is kept at an introductory level in the discussion in this tutorial review.
November 20, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/29148596/transition-metal-catalyzed-selective-cage-b-h-functionalization-of-o-carboranes
#2
Zuowei Xie, Yangjian Quan, Zaozao Qiu
Carboranes are a class of carbon-boron molecular clusters with unusual thermal and chemical stabilities. They have been proved as very useful building blocks in supramolecular design, optoelectronics, nanomaterials, boron neutron capture therapy agents and organometallic/coordination chemistry. Thus, the functionalization of o-carboranes has received growing interests. Over the past decades, most of the works in this area have been focused on cage carbon functionalization as the weakly acidic cage C-H proton can be readily deprotonated by strong bases...
November 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29100156/samarium-doped-boron-nitride-nanotubes
#3
Wellington Marcos da Silva, Tiago Hilário Ferreira, Carlos Antônio de Morais, Alexandre Soares Leal, Edésia Martins Barros Sousa
Boron nitride nanotubes doped in situ with samarium (Sm-doped BNNTs) were synthesized at 1150°C under atmosphere of NH3/N2 gas mixture by thermal chemical vapor deposition (TCVD) using samarium oxide that is a product of the process separation of thorium and uranium tailings. The samarium in the BNNTs sample was activated by neutron capture, in a nuclear reactor, producing (152)Sm radioisotopes. The STEM-EELS spectrum and neutron activation show energies attributed to the samarium confirming the in situ doping process during BNNTs growth...
October 31, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29061819/effect-of-tumor-microenvironment-on-selective-uptake-of-boric-acid-in-hepg2-human-hepatoma-cells
#4
Yu-Chi Bai, Yu-Chun Hsia, Yu-Ting Lin, Kuan-Hao Chen, Fong-In Chou, Chia-Min Yang, Yung-Jen Chuang
BACKGROUND: Feasibility and efficacy of boric acid (BA)-mediated boron neutron capture therapy (BNCT) was first demonstrated by eliminating hepatocellular carcinoma (HCC) in a rat model. Furthermore, selective uptake of BA by liver tumor cells was shown in a rabbit model. To gain further insight, this study aimed to investigate the mechanisms of transportation and selective uptake of BA in HepG2 liver tumor cells. MATERIALS AND METHODS: Transportation of BA in HepG2 cells was analyzed by time-course assays and by analyzing the rate of diffusion versus the concentration of BA...
November 2017: Anticancer Research
https://www.readbyqxmd.com/read/29036572/dose-effect-of-the-33s-n-%C3%AE-30si-reaction-in-bnct-using-the-new-n_tof-cern-data
#5
M Sabaté-Gilarte, J Praena, I Porras, J M Quesada
33S is a stable isotope of sulphur which is being studied as a potential cooperative target for Boron Neutron Capture Therapy (BNCT) in accelerator-based neutron sources because of its large (n,α) cross section in the epithermal neutron energy range. Previous measurements resolved the resonances with a discrepant description of the lowest-lying and strongest one (at 13.5 keV). However, the evaluations of the major databases do not include resonances, except EAF-2010 which shows smaller values in this range than the experimental data...
September 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29034910/from-boron-clusters-to-gold-clusters-new-label-free-colorimetric-sensors
#6
Bin Qi, Chenchen Wu, Ling Xu, Wenjing Wang, Jin Cao, Jun Liu, Shuai Zhang, Detlef Gabel, Haibo Zhang, Xiaohai Zhou
A fundamental boron cluster, [closo-B12H12](2-), mainly known as an inert agent for boron neutron capture therapy, can also serve as a bi-functional reductant and a capping agent for the formation of monodispersed size-controlled gold nanoparticles (AuNPs) under mild reaction conditions. The obtained AuNPs remained thermo-dynamically stable over 3 months, and exhibited high performance in phase transfer and sensing of heavy metal ions.
August 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29021997/dataset-on-the-synthesis-and-characterization-of-boron-fenbufen-and-its-f-18-labeled-homolog
#7
Chun-Nan Yeh, Chi-Wei Chang, Yi-Hsiu Chung, Shi-Wei Tien, Yong-Ren Chen, Tsung-Wen Chen, Ying-Cheng Huang, Hsin-Ell Wang, You-Cheng Chou, Ming-Huang Chen, Kun-Chun Chiang, Wen-Sheng Huang, Chung-Shan Yu
The data presented in this article are related to the research article entitled "Synthesis and Characterization of Boron Fenbufen and its F-18 Labeled Homolog for Boron Neutron Capture Therapy of COX-2 Overexpressed Cholangiocarcinoma". The contents of the data article include 1) the set up for performing in vitro binding assay, 2) (1)H-, (13)C- and (19)F-NMR of compounds described in main text, 3) HPLC chromatogram of the fluorination mixtures, 4) data of in vitro stability test, cell survival assay, western blot and PCR analysis, 5) the modules for fixing the two CCA rats for BNCT, and 6) bar diagram for tumor reduction using [(18)F]FDG-PET 24 h post treatment with BNCT...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/28888921/n-4-b-4-4-5-5-tetramethyl-1-3-2-dioxaborolan-methyl-2-deoxycytidine-as-a-potential-boron-delivery-agent-with-respect-to-glioblastoma
#8
Łukasz Uram, Joanna Nizioł, Piotr Maj, Justyna Sobich, Wojciech Rode, Tomasz Ruman
Glioblastoma multiforme (GBM) is a central nervous system tumor of grade IV, according to the WHO classification, extremely resistant to all currently used forms of therapy, including resection, radiotherapy, chemotherapy or combined therapy. Therefore, more effective treatment strategies of this tumor are needed, with boron neutron capture therapy (BNCT) being a potential solution, provided a proper cancer cells-targeted 10B delivery agent is found. In search of such an agent, toxicity and capacity to target DNA of a boronated derivative of 2'-deoxycytidine, N(4)-[B-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan)methyl]-2'-deoxycytidine (1), was tested against human tumor vs...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28886331/towards-carborane-functionalised-structures-for-the-treatment-of-brain-cancer
#9
REVIEW
Gianpiero Calabrese, Anis Daou, Eugen Barbu, John Tsibouklis
Boron neutron capture therapy (BNCT) is a promising targeted chemoradiotherapeutic technique for the management of invasive brain tumors, such as glioblastoma multiforme (GBM). A prerequisite for effective BNCT is the selective targeting of tumour cells with (10)B-rich therapeutic moieties. To this end, polyhedral boranes, especially carboranes, have received considerable attention because they combine a high boron content with relative low toxicity and metabolic inertness. Here, we review progress in the molecular design of recently investigated carborane derivatives in light of the widely accepted performance requirements for effective BNCT...
September 5, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28871389/boron-neutron-capture-therapy-bnct-translational-studies-in-the-hamster-cheek-pouch-model-of-oral-cancer-at-the-new-b2-configuration-of-the-ra-6-nuclear-reactor
#10
Andrea Monti Hughes, Juan Longhino, Esteban Boggio, Vanina A Medina, Diego J Martinel Lamas, Marcela A Garabalino, Elisa M Heber, Emiliano C C Pozzi, María E Itoiz, Romina F Aromando, David W Nigg, Verónica A Trivillin, Amanda E Schwint
Boron neutron capture therapy (BNCT) is based on selective accumulation of B-10 carriers in tumor followed by neutron irradiation. We demonstrated, in 2001, the therapeutic effect of BNCT mediated by BPA (boronophenylalanine) in the hamster cheek pouch model of oral cancer, at the RA-6 nuclear reactor. Between 2007 and 2011, the RA-6 was upgraded, leading to an improvement in the performance of the BNCT beam (B2 configuration). Our aim was to evaluate BPA-BNCT radiotoxicity and tumor control in the hamster cheek pouch model of oral cancer at the new "B2" configuration...
November 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28862209/accelerator-driven-neutron-source-design-via-beryllium-target-and-208-pb-moderator-for-boron-neutron-capture-therapy-in-alternative-treatment-strategy-by-monte-carlo-method
#11
Abdollah Khorshidi
AIMS: The reactor has increased its area of application into medicine especially boron neutron capture therapy (BNCT); however, accelerator-driven neutron sources can be used for therapy purposes. The present study aimed to discuss an alternative method in BNCT functions by a small cyclotron with low current protons based on Karaj cyclotron in Iran. MATERIALS AND METHODS: An epithermal neutron spectrum generator was simulated with 30 MeV proton energy for BNCT purposes...
July 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28858854/photon-iso-effective-dose-for-cancer-treatment-with-mixed-field-radiation-based-on-dose-response-assessment-from-human-and-an-animal-model-clinical-application-to-boron-neutron-capture-therapy-for-head-and-neck-cancer
#12
Sara Josefina Gonzalez, Emiliano C C Pozzi, Andrea Monti Hughes, Lucas Provenzano, Hanna Koivunoro, Daniel Germán Carando, Silvia Inés Thorp, Mariana Rosalía Casal, Silva Bortolussi, Verónica A Trivillin, Marcela A Garabalino, Paula Curotto, Elisa M Heber, Gustavo A Santa Cruz, Leena Kankaanranta, Heikki Joensuu, Amanda E Schwint
Boron Neutron Capture Therapy (BNCT) is a treatment modality that combines different radiation qualities. Since the severity of biological damage following irradiation depends on the radiation type, a quantity different from absorbed dose is required to explain effects observed in the clinical BNCT in terms of outcome compared with conventional photon radiation therapy. A new approach for calculating photon iso-effective doses in BNCT was introduced previously. The present work extends this model to include information from dose-response assessments in animal models and humans...
August 31, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28852112/interactions-of-boron-clusters-and-their-derivatives-with-serum-albumin
#13
Tomasz M Goszczyński, Krzysztof Fink, Konrad Kowalski, Zbigniew J Leśnikowski, Janusz Boratyński
Boron clusters are polyhedral boron hydrides with unique properties, and they are becoming increasingly widely used in biology and medicine, including for boron neutron capture therapy (BNCT) of cancers and in the design of novel bioactive molecules and potential drugs. Among boron cluster types, icosahedral boranes, carboranes, and metallacarboranes are particularly interesting, and there is a need for basic studies on their interaction with biologically important molecules, such as proteins. Herein, we report studies on the interaction of selected boron clusters and their derivatives with serum albumin, the most abundant protein in mammalian blood...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28832537/high-boron-loaded-dna-oligomers-as-potential-boron-neutron-capture-therapy-and-antisense-oligonucleotide-dual-action-anticancer-agents
#14
Damian Kaniowski, Katarzyna Ebenryter-Olbińska, Milena Sobczak, Błażej Wojtczak, Sławomir Janczak, Zbigniew J Leśnikowski, Barbara Nawrot
Boron cluster-modified therapeutic nucleic acids with improved properties are of interest in gene therapy and in cancer boron neutron capture therapy (BNCT). High metallacarborane-loaded antisense oligonucleotides (ASOs) targeting epidermal growth factor receptor (EGFR) were synthesized through post-synthetic Cu (I)-assisted "click" conjugation of alkyne-modified DNA-oligonucleotides with a boron cluster alkyl azide component. The obtained oligomers exhibited increased lipophilicity compared to their non-modified precursors, while their binding affinity to complementary DNA and RNA strands was slightly decreased...
August 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28806981/understanding-the-potentiality-of-accelerator-based-boron-neutron-capture-therapy-for-osteosarcoma-dosimetry-assessment-based-on-the-reported-clinical-experience
#15
Silva Bortolussi, Ian Postuma, Nicoletta Protti, Lucas Provenzano, Cinzia Ferrari, Laura Cansolino, Paolo Dionigi, Olimpio Galasso, Giorgio Gasparini, Saverio Altieri, Shin-Ichi Miyatake, Sara J González
BACKGROUND: Osteosarcoma is the most frequent primary malignant bone tumour, and its incidence is higher in children and adolescents, for whom it represents more than 10% of solid cancers. Despite the introduction of adjuvant and neo-adjuvant chemotherapy that markedly increased the success rate in the treatment, aggressive surgery is still needed and a considerable percentage of patients do not survive due to recurrences or early metastases. Boron Neutron Capture Therapy (BNCT), an experimental radiotherapy, was investigated as a treatment that could allow a less aggressive surgery by killing infiltrated tumour cells in the surrounding healthy tissues...
August 15, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28806667/hydrophobic-boron-compound-loaded-poly-l-lactide-co-glycolide-nanoparticles-for-boron-neutron-capture-therapy
#16
Issei Takeuchi, Kensuke Nomura, Kimiko Makino
Poly(DL-lactide-co-glycolide) (PLGA) has been widely used and studied because of its biocompatibility and biodegradability. Recently, the usefulness of nanoparticles using poly(L-lactide-co-glycolide) (PLLGA) having a higher glass transition temperature than PLGA was suggested. In this study, we investigated the availability of boron compound-loaded PLGA and PLLGA nanoparticles for boron neutron capture therapy (BNCT) by conducting biodistribution study using tumor-bearing mice. o-Carborane, a hydrophobic boron compound, was used as a boron carrier, and o-carborane-albumin conjugate was used as a control...
August 4, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28791476/abscopal-effect-of-boron-neutron-capture-therapy-bnct-proof-of-principle-in-an-experimental-model-of-colon-cancer
#17
Verónica A Trivillin, Emiliano C C Pozzi, Lucas L Colombo, Silvia I Thorp, Marcela A Garabalino, Andrea Monti Hughes, Sara J González, Rubén O Farías, Paula Curotto, Gustavo A Santa Cruz, Daniel G Carando, Amanda E Schwint
The aim of the present study was to evaluate, for the first time, the abscopal effect of boron neutron capture therapy (BNCT). Twenty-six BDIX rats were inoculated subcutaneously with 1 × 10(6) DHD/K12/TRb syngeneic colon cancer cells in the right hind flank. Three weeks post-inoculation, the right leg of 12 rats bearing the tumor nodule was treated with BPA-BNCT (BPA-Boronophenylalanine) at the RA-3 nuclear reactor located in Buenos Aires, Argentina, at an absorbed dose of 7.5 Gy to skin as the dose-limiting tissue...
November 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28765533/development-of-an-integrated-monte-carlo-model-for-glioblastoma-multiforme-treated-with-boron-neutron-capture-therapy
#18
Leyla Moghaddasi, Eva Bezak
Glioblastomas (GBM) are notorious for their high fatality rate. Boron Neutron Capture Therapy (BNCT) being a biochemically targeted type of radiotherapy is a potent modality for GBM. In the current work, a BNCT treatment modelling framework for GBM was developed. Optimal Clinical Target Volume (CTV) margins for GBM-BNCT and the BNCT efficacy have been investigated. The model integrated a cell-based dosimetry model, an in-house-developed epithermal neutron beam model and previously-developed Microscopic Extension Probability (MEP) model...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28728977/synthesis-and-characterization-of-boron-fenbufen-and-its-f-18-labeled-homolog-for-boron-neutron-capture-therapy-of-cox-2-overexpressed-cholangiocarcinoma
#19
Chun-Nan Yeh, Chi-Wei Chang, Yi-Hsiu Chung, Shi-Wei Tien, Yong-Ren Chen, Tsung-Wen Chen, Ying-Cheng Huang, Hsin-Ell Wang, You-Cheng Chou, Ming-Huang Chen, Kun-Chun Chiang, Wen-Sheng Huang, Chung-Shan Yu
Boron neutron capture therapy (BNCT) is a binary therapy that employs neutron irradiation on the boron agents to release high-energy helium and alpha particles to kill cancer cells. An optimal response to BNCT depends critically on the time point of maximal (10)B accumulation and highest tumor to normal ratio (T/N) for performing the neutron irradiation. The aggressive cholangiocarcinoma (CCA) representing a liver cancer that overexpresses COX-2 enzyme is aimed to be targeted by COX-2 selective boron carrier, fenbufen boronopinacol (FBPin)...
July 17, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28683435/validation-and-comparison-of-the-therapeutic-efficacy-of-boron-neutron-capture-therapy-mediated-by-boron-rich-liposomes-in-multiple-murine-tumor-models
#20
Charles A Maitz, Aslam A Khan, Peter J Kueffer, John D Brockman, Jonathan Dixson, Satish S Jalisatgi, David W Nigg, Thomas A Everett, M Frederick Hawthorne
Boron neutron capture therapy (BNCT) was performed at the University of Missouri Research Reactor in mice bearing CT26 colon carcinoma flank tumors and the results were compared with previously performed studies with mice bearing EMT6 breast cancer flank tumors. Mice were implanted with CT26 tumors subcutaneously in the caudal flank and were given two separate tail vein injections of unilamellar liposomes composed of cholesterol, 1,2-distearoyl-sn-glycer-3-phosphocholine, and K[nido-7-CH3(CH2)15-7,8-C2B9H11] in the lipid bilayer and encapsulated Na3[1-(2`-B10H9)-2-NH3B10H8] within the liposomal core...
August 2017: Translational Oncology
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