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Diz F, Monteiro WF, Silveira IS, Ruano D, Zotti ER, Weimer RD, Melo MN, Schossler Lopes JG, Scheffel TB, Caldas LVE, da Costa JC, Morrone FB, Ligabue RA. Zinc-Modified Titanate Nanotubes as Radiosensitizers for Glioblastoma: Enhancing Radiotherapy Efficacy and Monte Carlo Simulations. ACS OMEGA 2024; 9:29499-29515. [PMID: 39005768 PMCID: PMC11238320 DOI: 10.1021/acsomega.4c02125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/13/2024] [Accepted: 06/17/2024] [Indexed: 07/16/2024]
Abstract
Radiotherapy (RT) is the established noninvasive treatment for glioblastoma (GBM), a highly aggressive malignancy. However, its effectiveness in improving patient survival remains limited due to the radioresistant nature of GBM. Metal-based nanostructures have emerged as promising strategies to enhance RT efficacy. Among them, titanate nanotubes (TNTs) have gained significant attention due to their biocompatibility and cost-effectiveness. This study aimed to synthesize zinc-modified TNTs (ZnTNT) from sodium TNTs (NaTNT), in addition to characterizing the formed nanostructures and evaluating their radiosensitization effects in GBM cells (U87 and U251). Hydrothermal synthesis was employed to fabricate the TNTs, which were characterized using various techniques, including transmission electron microscopy (TEM), energy-dispersive spectroscopy, scanning-transmission mode, Fourier-transform infrared spectroscopy, ICP-MS (inductively coupled plasma mass spectrometry), X-ray photoelectron spectroscopy, and zeta potential analysis. Cytotoxicity was evaluated in healthy (Vero) and GBM (U87 and U251) cells by the MTT assay, while the internalization of TNTs was observed through TEM imaging and ICP-MS. The radiosensitivity of ZnTNT and NaTNT combined with 5 Gy was evaluated using clonogenic assays. Monte Carlo simulations using the MCNP6.2 code were performed to determine the deposited dose in the culture medium for RT scenarios involving TNT clusters and cells. The results demonstrated differences in the dose deposition values between the scenarios with and without TNTs. The study revealed that ZnTNT interfered with clonogenic integrity, suggesting its potential as a powerful tool for GBM treatment.
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Affiliation(s)
- Fernando
Mendonça Diz
- Preclinical
Research Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
- Graduate
Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Wesley F. Monteiro
- Graduate
Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Iury Santos Silveira
- Institute
of Energy and Nuclear Research, National
Nuclear Energy Commission—IPEN/CNEN. São Paulo, São Paulo 01151, Brazil
| | - Daniel Ruano
- ALBA
Syconhrotron Light Source, Cerdanuola
del Vallès 08290, Spain
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científica (UPV-CSIC), Valencia 46022, Spain
| | - Eduardo Rosa Zotti
- Graduate
Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Rafael Diogo Weimer
- Graduate
Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Micael Nunes Melo
- Institute
of Technology and Research—ITP, Aracaju, Sergipe 49032-490 Brazil
| | - João Gabriel Schossler Lopes
- Radiotherapy
Service at Hospital São Lucas da Pontifical Catholic University
of Rio Grande do Sul/Oncoclinic Group, Porto Alegre, Rio Grande do Sul 90619-900, Brazil
| | - Thamiris Becker Scheffel
- Preclinical
Research Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Linda V. E. Caldas
- Institute
of Energy and Nuclear Research, National
Nuclear Energy Commission—IPEN/CNEN. São Paulo, São Paulo 01151, Brazil
| | - Jaderson Costa da Costa
- Preclinical
Research Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Fernanda Bueno Morrone
- Preclinical
Research Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
- School
of Life and Health Sciences, Pontifical
Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
| | - Rosane Angélica Ligabue
- Graduate
Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul—PUCRS, Porto Alegre, Rio Grande
do Sul 90619-900, Brazil
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Raitanen J, Barta B, Fuchs H, Hacker M, Balber T, Georg D, Mitterhauser M. Radiobiological Assessment of Targeted Radionuclide Therapy with [ 177Lu]Lu-PSMA-I&T in 2D vs. 3D Cell Culture Models. Int J Mol Sci 2023; 24:17015. [PMID: 38069337 PMCID: PMC10706939 DOI: 10.3390/ijms242317015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
In vitro therapeutic efficacy studies are commonly conducted in cell monolayers. However, three-dimensional (3D) tumor spheroids are known to better represent in vivo tumors. This study used [177Lu]Lu-PSMA-I&T, an already clinically applied radiopharmaceutical for targeted radionuclide therapy against metastatic castrate-resistant prostate cancer, to demonstrate the differences in the radiobiological response between 2D and 3D cell culture models of the prostate cancer cell lines PC-3 (PSMA negative) and LNCaP (PSMA positive). After assessing the target expression in both models via Western Blot, cell viability, reproductive ability, and growth inhibition were assessed. To investigate the geometric effects on dosimetry for the 2D vs. 3D models, Monte Carlo simulations were performed. Our results showed that PSMA expression in LNCaP spheroids was highly preserved, and target specificity was shown in both models. In monolayers of LNCaP, no short-term (48 h after treatment), but only long-term (14 days after treatment) radiobiological effects were evident, showing decreased viability and reproductive ability with the increasing activity. Further, LNCaP spheroid growth was inhibited with the increasing activity. Overall, treatment efficacy was higher in LNCaP spheroids compared to monolayers, which can be explained by the difference in the resulting dose, among others.
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Affiliation(s)
- Julia Raitanen
- Ludwig Boltzmann Institute Applied Diagnostics, 1090 Vienna, Austria; (J.R.)
- Department of Biomedical Imaging and Image-Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
- Vienna Doctoral School of Chemistry (DoSChem), University of Vienna, 1090 Vienna, Austria
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Bernadette Barta
- Ludwig Boltzmann Institute Applied Diagnostics, 1090 Vienna, Austria; (J.R.)
| | - Hermann Fuchs
- Department of Radiation Oncology, Division of Medical Radiation Physics, Medical University of Vienna, 1090 Vienna, Austria
| | - Marcus Hacker
- Department of Biomedical Imaging and Image-Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Theresa Balber
- Ludwig Boltzmann Institute Applied Diagnostics, 1090 Vienna, Austria; (J.R.)
- Department of Biomedical Imaging and Image-Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility, Medical University of Vienna, University of Vienna, 1090 Vienna, Austria
| | - Dietmar Georg
- Department of Radiation Oncology, Division of Medical Radiation Physics, Medical University of Vienna, 1090 Vienna, Austria
| | - Markus Mitterhauser
- Ludwig Boltzmann Institute Applied Diagnostics, 1090 Vienna, Austria; (J.R.)
- Department of Biomedical Imaging and Image-Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility, Medical University of Vienna, University of Vienna, 1090 Vienna, Austria
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Zhang C, Li X, Lu J, Li C, Wang Y, Xu X, Yang X. Enhanced electron beam and X-ray beam therapy by applying nanoparticle heterojunctions: A Monte Carlo simulation. Appl Radiat Isot 2023; 199:110869. [PMID: 37267775 DOI: 10.1016/j.apradiso.2023.110869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 05/02/2023] [Accepted: 05/20/2023] [Indexed: 06/04/2023]
Abstract
Cancer has become one of the major diseases that seriously threaten human health. In order to improve the therapeutic gain ratio (TGF) of conventional X-ray and electron beams, we studied the dose enhancement effect and secondary electrons emission of Au-Fe nanoparticle heterostructures by Monte Carlo method. Under the irradiation of 6 MeV photon and 6 MeV electron beams, the Au-Fe mixture has a dose enhancement effect. For this reason, we explored the secondary electrons production that leads to dose enhancement. For 6 MeV electron beam irradiation, Au-Fe nanoparticle heterojunctions have an higher electrons emission than Au and Fe nanoparticles. When cubic, spherical and cylindrical heterogeneous structures are considered, the electron emission of the columnar Au-Fe nanoparticles is the highest, with a maximum value of 0.00024. For 6 MV X-ray beam irradiation, Au nanoparticle and Au-Fe nanoparticle heterojunction have similar electrons emission, while Fe nanoparticle has the lowest one. When cubic, spherical and cylindrical heterogeneous structures are considered, the electron emission of the columnar Au-Fe nanoparticles is the highest, with a maximum value of 0.000118. This study contributes to improve the tumor-killing effect of conventional X-ray radiotherapy treatment and has guiding significance for the research of new nanoparticles.
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Affiliation(s)
- Chuhan Zhang
- College of Physics, Jilin University, Changchun 130012, China
| | - Xiaoyi Li
- College of Physics, Jilin University, Changchun 130012, China
| | - Jingbin Lu
- College of Physics, Jilin University, Changchun 130012, China.
| | - Chengqian Li
- College of Physics, Jilin University, Changchun 130012, China
| | - Yu Wang
- College of Physics, Jilin University, Changchun 130012, China
| | - Xu Xu
- College of Physics, Jilin University, Changchun 130012, China
| | - Xiangshan Yang
- College of Public Health, Jilin University, Changchun 130012, China
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Spina A, Chow JCL. Dosimetric Impact on the Flattening Filter and Addition of Gold Nanoparticles in Radiotherapy: A Monte Carlo Study on Depth Dose Using the 6 and 10 MV FFF Photon Beams. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15207194. [PMID: 36295262 PMCID: PMC9609907 DOI: 10.3390/ma15207194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/30/2022] [Accepted: 10/13/2022] [Indexed: 06/04/2023]
Abstract
PURPOSE This phantom study investigated through Monte Carlo simulation how the dose enhancement varied with depth, when gold nanoparticles (NPs) were added using the flattening filter-free (FFF) photon beams in gold NP-enhanced radiotherapy. METHOD A phantom with materials varying from pure water to a mixture of water and gold NPs at different concentrations (3-40 mg/mL) were irradiated by the 6 and 10 MV flattening filter (FF) and FFF photon beams. Monte Carlo simulations were carried out to determine the depth doses along the central beam axis of the phantom up to a depth of 40 cm. The dose enhancement ratio (DER) and FFF enhancement ratio (FFFER) were calculated based on the Monte Carlo results. RESULTS The DER values were found decreased with an increase of depth and increase of NP concentration in the phantom. For the maximum NP concentration of 40 mg/mL, the DER values decreased 6.9, 12, 4.6 and 7.2% at a phantom depth from 2 to 40 cm, using the 6 MV FF, 6 MV FFF, 10 MV FF and 10 MV FFF photon beams, respectively. The maximum DER values for the 6 MV beams were 1.08 (FF) and 1.14 (FFF), while those for the 10 MV beams were 1.04 (FF) and 1.07 (FFF). When the FF was removed from the linear accelerator head, the FFFER showed a more significant increase of dose enhancement for the 6 MV beams (1.057) than the 10 MV (1.031). CONCLUSION From the DER and FFFER values based on the Monte Carlo results, it is concluded that the dose enhancement with depth was dependent on the NP and beam variables, namely, NP concentration, presence of FF in the beam and beam energy. Dose enhancement was more significant when using the lower photon beam energy (i.e., 6 MV), FFF photon beam and higher NP concentration in the study.
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Affiliation(s)
- Armando Spina
- Department of Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - James C. L. Chow
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1X6, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, ON M5T 1P5, Canada
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Sadiq A, Chow JCL. Evaluation of Dosimetric Effect of Bone Scatter on Nanoparticle-Enhanced Orthovoltage Radiotherapy: A Monte Carlo Phantom Study. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12172991. [PMID: 36080028 PMCID: PMC9457938 DOI: 10.3390/nano12172991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/26/2022] [Accepted: 08/26/2022] [Indexed: 06/04/2023]
Abstract
In nanoparticle (NP)-enhanced orthovoltage radiotherapy, bone scatter affected dose enhancement at the skin lesion in areas such as the forehead, chest wall, and knee. Since each of these treatment sites have a bone, such as the frontal bone, rib, or patella, underneath the skin lesion and this bone is not considered in dose delivery calculations, uncertainty arises in the evaluation of dose enhancement with the addition of NPs in radiotherapy. To investigate the impact of neglecting the effect of bone scatter, Monte Carlo simulations based on heterogeneous phantoms were carried out to determine and compare the dose enhancement ratio (DER), when a bone was and was not present underneath the skin lesion. For skin lesions with added NPs, Monte Carlo simulations were used to calculate the DER values using different elemental NPs (gold, platinum, silver, iodine, as well as iron oxide), in varying NP concentrations (3−40 mg/mL), at two different photon beam energies (105 and 220 kVp). It was found that DER values at the skin lesion increased with the presence of bone when there was a higher atomic number of NPs, a higher NP concentration, and a lower photon beam energy. When comparing DER values with and without bone, using the same NP elements, NP concentration, and beam energy, differences were found in the range 0.04−3.55%, and a higher difference was found when the NP concentration increased. By considering the uncertainty in the DER calculation, the effect of bone scatter became significant to the dose enhancement (>2%) when the NP concentration was higher than 18 mg/mL. This resulted in an underestimation of dose enhancement at the skin lesion, when the bone underneath the tumour was neglected during orthovoltage radiotherapy.
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Affiliation(s)
- Afia Sadiq
- Department of Medical Physics, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - James C. L. Chow
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1X6, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, ON M5T 1P5, Canada
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Tegaw EM, Geraily G, Gholami S, Shojaei M, Tadesse GF. Gold-nanoparticle-enriched breast tissue in breast cancer treatment using the INTRABEAM® system: a Monte Carlo study. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2022; 61:119-131. [PMID: 34860272 DOI: 10.1007/s00411-021-00954-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
Using a 50-kV INTRABEAM® system after breast-conserving surgery, breast skin injury and long treatment time remain the challenging problems when large-size spherical applicators are used. This study has aimed to address these problems using gold (Au) nanoparticles (NPs). For this, surface and isotropic doses were measured using a Gafchromic EBT3 film and a water phantom. The particle propagation code EGSnrc/Epp was used to score the corresponding doses using a geometry similar to that used in the measurements. The simulation was validated using a gamma index of 2%/2 mm acceptance criterion in the gamma analysis. After validation Au-NP-enriched breast tissue was simulated to quantify any breast skin dose reduction and shortening of treatment time. It turned out that the gamma value deduced for validation of the simulation was in an acceptable range (i.e., less than one). For 20 mg-Au/g-breast tissue, the calculated Dose Enhancement Ratio (DER) of the breast skin was 0.412 and 0.414 using applicators with diameters of 1.5 cm and 5 cm, respectively. The corresponding treatment times were shortened by 72.22% and 72.30% at 20 mg-Au/g-breast tissue concentration, respectively. It is concluded that Au-NP-enriched breast tissue shows significant advantages, such as reducing the radiation dose received by the breast skin as well as shortening the treatment time. Additionally, the DERs were not significantly dependent on the size of the applicators.
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Affiliation(s)
- Eyachew Misganew Tegaw
- Department of Physics, Faculty of Natural and Computational Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Ghazale Geraily
- Department of Medical Physics and Biomedical Engineering, School of Medicine, International Campus (TUMS-IC), Tehran University of Medical Sciences, Tehran, Iran.
| | - Somayeh Gholami
- Radiation Oncology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Shojaei
- Department of Medical Physics and Biomedical Engineering, School of Medicine, International Campus (TUMS-IC), Tehran University of Medical Sciences, Tehran, Iran
| | - Getu Ferenji Tadesse
- Department of Physics, College of Natural and Computational Sciences, Aksum University, Axum, Ethiopia
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Silva F, D’Onofrio A, Mendes C, Pinto C, Marques A, Campello MPC, Oliveira MC, Raposinho P, Belchior A, Di Maria S, Marques F, Cruz C, Carvalho J, Paulo A. Radiolabeled Gold Nanoseeds Decorated with Substance P Peptides: Synthesis, Characterization and In Vitro Evaluation in Glioblastoma Cellular Models. Int J Mol Sci 2022; 23:ijms23020617. [PMID: 35054798 PMCID: PMC8775581 DOI: 10.3390/ijms23020617] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 12/31/2021] [Accepted: 01/03/2022] [Indexed: 02/07/2023] Open
Abstract
Despite some progress, the overall survival of patients with glioblastoma (GBM) remains extremely poor. In this context, there is a pressing need to develop innovative therapy strategies for GBM, namely those based on nanomedicine approaches. Towards this goal, we have focused on nanoparticles (AuNP-SP and AuNP-SPTyr8) with a small gold core (ca. 4 nm), carrying DOTA chelators and substance P (SP) peptides. These new SP-containing AuNPs were characterized by a variety of analytical techniques, including TEM and DLS measurements and UV-vis and CD spectroscopy, which proved their high in vitro stability and poor tendency to interact with plasma proteins. Their labeling with diagnostic and therapeutic radionuclides was efficiently performed by DOTA complexation with the trivalent radiometals 67Ga and 177Lu or by electrophilic radioiodination with 125I of the tyrosyl residue in AuNP-SPTyr8. Cellular studies of the resulting radiolabeled AuNPs in NKR1-positive GBM cells (U87, T98G and U373) have shown that the presence of the SP peptides has a crucial and positive impact on their internalization by the tumor cells. Consistently, 177Lu-AuNP-SPTyr8 showed more pronounced radiobiological effects in U373 cells when compared with the non-targeted congener 177Lu-AuNP-TDOTA, as assessed by cell viability and clonogenic assays and corroborated by Monte Carlo microdosimetry simulations.
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Affiliation(s)
- Francisco Silva
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Correspondence: (F.S.); (A.P.)
| | - Alice D’Onofrio
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Carolina Mendes
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Catarina Pinto
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Ana Marques
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Maria Paula Cabral Campello
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal
| | - Maria Cristina Oliveira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal
| | - Paula Raposinho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal
| | - Ana Belchior
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Salvatore Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal
| | - Carla Cruz
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal; (C.C.); (J.C.)
| | - Josué Carvalho
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal; (C.C.); (J.C.)
| | - António Paulo
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal; (A.D.); (C.M.); (C.P.); (A.M.); (M.P.C.C.); (M.C.O.); (P.R.); (A.B.); (S.D.M.); (F.M.)
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela LRS, Portugal
- Correspondence: (F.S.); (A.P.)
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Artificial Intelligence in Radiotherapy and Patient Care. Artif Intell Med 2022. [DOI: 10.1007/978-3-030-64573-1_143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Jabeen M, Chow JCL. Gold Nanoparticle DNA Damage by Photon Beam in a Magnetic Field: A Monte Carlo Study. NANOMATERIALS 2021; 11:nano11071751. [PMID: 34361137 PMCID: PMC8308193 DOI: 10.3390/nano11071751] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/29/2021] [Accepted: 07/01/2021] [Indexed: 02/06/2023]
Abstract
Ever since the emergence of magnetic resonance (MR)-guided radiotherapy, it is important to investigate the impact of the magnetic field on the dose enhancement in deoxyribonucleic acid (DNA), when gold nanoparticles are used as radiosensitizers during radiotherapy. Gold nanoparticle-enhanced radiotherapy is known to enhance the dose deposition in the DNA, resulting in a double-strand break. In this study, the effects of the magnetic field on the dose enhancement factor (DER) for varying gold nanoparticle sizes, photon beam energies and magnetic field strengths and orientations were investigated using Geant4-DNA Monte Carlo simulations. Using a Monte Carlo model including a single gold nanoparticle with a photon beam source and DNA molecule on the left and right, it is demonstrated that as the gold nanoparticle size increased, the DER increased. However, as the photon beam energy decreased, an increase in the DER was detected. When a magnetic field was added to the simulation model, the DER was found to increase by 2.5-5% as different field strengths (0-2 T) and orientations (x-, y- and z-axis) were used for a 100 nm gold nanoparticle using a 50 keV photon beam. The DNA damage reflected by the DER increased slightly with the presence of the magnetic field. However, variations in the magnetic field strength and orientation did not change the DER significantly.
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Affiliation(s)
- Mehwish Jabeen
- Department of Physics, Ryerson University, Toronto, ON M5B 2K3, Canada;
| | - James C. L. Chow
- Department of Radiation Oncology, University of Toronto and Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, ON M5G 1Z5, Canada
- Correspondence: ; Tel.: +1-416-946-4501
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On the Equivalence of the Biological Effect Induced by Irradiation of Clusters of Heavy Atom Nanoparticles and Homogeneous Heavy Atom-Water Mixtures. Cancers (Basel) 2021; 13:cancers13092034. [PMID: 33922478 PMCID: PMC8122863 DOI: 10.3390/cancers13092034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/17/2021] [Accepted: 04/21/2021] [Indexed: 12/19/2022] Open
Abstract
A multiscale local effect model (LEM)-based framework was implemented to study the cell damage caused by the irradiation of clusters of gold nanoparticles (GNPs) under clinically relevant conditions. The results were compared with those obtained by a homogeneous mixture of water and gold (MixNP) irradiated under similar conditions. To that end, Monte Carlo simulations were performed for the irradiation of GNP clusters of different sizes and MixNPs with a 6 MV Linac spectrum to calculate the dose enhancement factor in water. The capabilities of our framework for the prediction of cell damage trends are examined and discussed. We found that the difference of the main parameter driving the cell damage between a cluster of GNPs and the MixNP was less than 1.6% for all cluster sizes. Our results demonstrate for the first time a simple route to intuit the radiobiological effects of clusters of nanoparticles through the consideration of an equivalent homogenous gold/water mixture. Furthermore, the negligible difference on cell damage between a cluster of GNPs and MixNP simplifies the modelling for the complex geometries of nanoparticle aggregations and saves computational resources.
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11
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Moradi F, Rezaee Ebrahim Saraee K, Abdul Sani S, Bradley D. Metallic nanoparticle radiosensitization: The role of Monte Carlo simulations towards progress. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2020.109294] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Yang S, Han G, Chen Q, Yu L, Wang P, Zhang Q, Dong J, Zhang W, Huang J. Au-Pt Nanoparticle Formulation as a Radiosensitizer for Radiotherapy with Dual Effects. Int J Nanomedicine 2021; 16:239-248. [PMID: 33469284 PMCID: PMC7811476 DOI: 10.2147/ijn.s287523] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 12/18/2020] [Indexed: 12/20/2022] Open
Abstract
Background Radiotherapy occupies an essential position as one of the most significant approaches for the clinical treatment of cancer. However, we cannot overcome the shortcoming of X-rays which is the high value of the oxygen enhancement ratio (OER). Radiosensitizers with the ability to enhance the radiosensitivity of tumor cells provide an alternative to changing X-rays to protons and heavy ion radiotherapy. Materials and Methods We prepared the Au-Pt nanoparticles (Au-Pt NPs) using a one-step method. The characteristics of the Au-Pt NPs were determined using TEM, HAADF-STEM, elemental mapping images, and DLS. The enhanced radiotherapy was demonstrated in vitro using MTT assays, colony formation assays, fluorescence imaging, and flow cytometric analyses of the apoptosis. The biodistribution of the Au-Pt NPs was analyzed using ICP-OES, and thermal images. The enhanced radiotherapy was demonstrated in vitro using immunofluorescence images, tumor volume and weigh, and hematoxylin & eosin (H&E) staining. Results Polyethylene glycol (PEG) functionalized nanoparticles composed of the metallic elements Au and Pt were designed to increase synergistic radiosensitivity. The mechanism demonstrated that heavy metal NPs possess a high X-ray photon capture cross-section and Compton scattering effect which increased DNA damage. Furthermore, the Au-Pt NPs exhibited enzyme-mimicking activities by catalyzing the decomposition of endogenous H2O2 to O2 in the solid tumor microenvironment (TME). Conclusion Our work provides a systematically administered radiosensitizer that can selectively reside in a tumor via the EPR effect and enhances the efficiency of treating cancer with radiotherapy.
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Affiliation(s)
- Song Yang
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Gaohua Han
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Quan Chen
- Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China.,Department of Thoracic Surgery, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China
| | - Lei Yu
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Peng Wang
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Qi Zhang
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Jiang Dong
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Wei Zhang
- Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China.,Department of Infectious Disease, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China
| | - Junxing Huang
- Department of Oncology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China.,Medical School of Nantong University, Nantong, Jiangsu, People's Republic of China
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13
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Artificial Intelligence in Radiotherapy and Patient Care. Artif Intell Med 2021. [DOI: 10.1007/978-3-030-58080-3_143-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sheeraz Z, Chow JC. Evaluation of dose enhancement with gold nanoparticles in kilovoltage radiotherapy using the new EGS geometry library in Monte Carlo simulation. AIMS BIOPHYSICS 2021. [DOI: 10.3934/biophy.2021027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
<abstract><sec>
<title>Purpose</title>
<p>This study compared the dose enhancement predicted in kilovoltage gold nanoparticle-enhanced radiotherapy using the newly developed EGS lattice and the typical gold-water mixture method in Monte Carlo simulation. This new method considered the gold nanoparticle-added volume consisting of solid nanoparticles instead of a gold-water mixture. In addition, this particle method is more realistic in simulation.</p>
</sec><sec>
<title>Methods</title>
<p>A heterogeneous phantom containing bone and water was irradiated by the 105 and 220 kVp x-ray beams. Gold nanoparticles were added to the tumour volume with concentration varying from 3–40 mg/mL in the phantom. The dose enhancement ratio (DER), defined as the ratio of dose at the tumour with and without adding gold nanoparticles, was calculated by the gold-water mixture and particle method using Monte Carlo simulation for comparison.</p>
</sec><sec>
<title>Results</title>
<p>It is found that the DER was 1.44–4.71 (105 kVp) and 1.27–2.43 (220 kVp) for the gold nanoparticle concentration range of 3–40 mg/mL, when they were calculated by the gold-water mixture method. The DER was slightly larger and equal to 1.47–4.84 (105 kVp) and 1.29–2.5 (220 kVp) for the same concentration range, when the particle method was used. Moreover, the DER predicted by both methods increased with an increase of nanoparticle concentration, and a decrease of x-ray beam energy.</p>
</sec><sec>
<title>Conclusion</title>
<p>The deviation of DER determined by the particle and gold-water mixture method was insignificant when considering the uncertainty in the calculation of DER (2%) in the nanoparticle concentration range of 3–40 mg/mL. It is therefore concluded that the gold-water mixture method could predict the dose enhancement as accurate as the newly developed particle method.</p>
</sec></abstract>
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Chow JC. Computer method and modeling: Medical biophysics applications in cancer therapy, medical imaging and drug delivery. AIMS BIOPHYSICS 2021. [DOI: 10.3934/biophy.2021017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Depth Dose Enhancement on Flattening-Filter-Free Photon Beam: A Monte Carlo Study in Nanoparticle-Enhanced Radiotherapy. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10207052] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The aim of this study is to investigate the variations of depth dose enhancement (DDE) on different nanoparticle (NP) variables, when using the flattening-filter-free (FFF) photon beam in nanoparticle-enhanced radiotherapy. Monte Carlo simulation under a macroscopic approach was used to determine the DDE ratio (DDER) with variables of NP material (gold (Au) and iron (III) oxide (Fe2O3)), NP concentration (3–40 mg/mL) and photon beam (10 MV flattening-filter (FF) and 10 MV FFF). It is found that Au NPs had a higher DDER than Fe2O3 NPs, when the depths were shallower than 6 and 8 cm for the 10 MV FF and 10 MV FFF photon beams, respectively. However, in a deeper depth range of 10–20 cm, DDER for the Au NPs was lower than Fe2O3 NPs mainly due to the beam attenuation and photon energy distribution. It is concluded that DDER for the Au NPs and Fe2O3 NPs decreased with an increase of depth in the range of 10–20 cm, with rate of decrease depending on the NP material, NP concentration and the use of FF in the photon beam.
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Sivayogan T, Chow JCL. Monitor unit calculation in electron therapy using Monte Carlo Simulation: a GUI for the phase-space field trimming. IOP SCINOTES 2020. [DOI: 10.1088/2633-1357/abb291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Purpose: We developed a graphical user interface (GUI) for electron phase-space field trimming using Monte Carlo simulations. This GUI can be used for monitor unit (MU) calculation in electron therapy. Methods: The GUI and electron field trimming algorithm were developed using MATLAB and C code. Phase-space files for the electron fields were generated using the EGSnrc code based on a Varian 21EX Linac with variables of applicator size, field size and energy. Verification of the alogrithm was carried out by comparing the relative output factor, which was used for MU calculation, predicted by Monte Carlo simulations and from actual measurements. Results: Our electron field trimming algorithm was found to be about five times faster than the original Monte Carlo simulation. Clinically, the GUI performed best when using voxel size ≥ 0.3 × 0.3 × 0.3 cm3, and field size larger than 2 cm in radius based on an acceptable deviation of 2%. Conclusion: A GUI for generating irregular field for MU calculation using Monte Carlo simulations was created as a user-friendly tool in electron therapy.
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Konefał A, Lniak W, Rostocka J, Orlef A, Sokół M, Kasperczyk J, Jarząbek P, Wrońska A, Rusiecka K. Influence of a shape of gold nanoparticles on the dose enhancement in the wide range of gold mass concentration for high-energy X-ray beams from a medical linac. Rep Pract Oncol Radiother 2020; 25:579-585. [PMID: 32494232 DOI: 10.1016/j.rpor.2020.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 04/07/2020] [Accepted: 05/13/2020] [Indexed: 01/18/2023] Open
Abstract
Aim This work is focused on the Monte Carlo microdosimetric calculations taking into account the influence of the AuNPs' shape, size and mass concentration on the radiation dose enhancement for the high-energy 6 MV and 18 MV X-ray therapeutic beams from a medical linac. Background Due to a high atomic number and the photoelectric effect, gold nanoparticles can significantly enhance doses of ionizing radiation. However, this enhancement depends upon several parameters, such as, inter alia, nanoparticles' shape etc. Method The simulated system was composed of the therapeutic beam, a water phantom with the target volume (with and without AuNPs) located at the depth of the maximum dose, i.e. at 1.5 cm for the 6 MV beam and at 3.5 cm for the 18 MV one. In the study the GEANT4 code was used because it makes it possible to get a very short step of simulation which is required in case of simulating the radiation interactions with nanostructures. Results The dependence between the dose increase and the mass concentration of gold was determined and described by a simple mathematical formula for three different shapes of gold nanoparticles - two nanorods of different sizes and a flat 2D structure. The dose increase with the saturation occurring with the increasing mass concentration of gold was observed. Conclusions It was found that relatively large cylindrical gold nanoparticles can limit the increase of the dose absorbed in the target volume much more than the large 2D gold nanostructure.
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Affiliation(s)
- Adam Konefał
- Institute of Physics, University of Silesia in Katowice, Katowice, Poland
| | - Wioletta Lniak
- Institute of Physics, University of Silesia in Katowice, Katowice, Poland
| | - Justyna Rostocka
- Institute of Physics, University of Silesia in Katowice, Katowice, Poland
| | - Andrzej Orlef
- Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice Branch, Department of Medical Physics, Gliwice, Poland
| | - Maria Sokół
- Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice Branch, Department of Medical Physics, Gliwice, Poland
| | - Janusz Kasperczyk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland
| | - Paulina Jarząbek
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland
| | - Aleksandra Wrońska
- Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland
| | - Katarzyna Rusiecka
- Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland
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Dose Enhancement for the Flattening-Filter-Free and Flattening-Filter Photon Beams in Nanoparticle-Enhanced Radiotherapy: A Monte Carlo Phantom Study. NANOMATERIALS 2020; 10:nano10040637. [PMID: 32235369 PMCID: PMC7221749 DOI: 10.3390/nano10040637] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/24/2020] [Accepted: 03/27/2020] [Indexed: 12/11/2022]
Abstract
Monte Carlo simulations were used to predict the dose enhancement ratio (DER) using the flattening-filter-free (FFF) and flattening-filter (FF) photon beams in prostate nanoparticle-enhanced radiotherapy, with multiple variables such as nanoparticle material, nanoparticle concentration, prostate size, pelvic size, and photon beam energy. A phantom mimicking the patient’s pelvis with various prostate and pelvic sizes was used. Macroscopic Monte Carlo simulation using the EGSnrc code was used to predict the dose at the prostate or target using the 6 MV FFF, 6 MV FF, 10 MV FFF, and 10 MV FF photon beams produced by a Varian TrueBeam linear accelerator (Varian Medical System, Palo Alto, CA, USA). Nanoparticle materials of gold, platinum, iodine, silver, and iron oxide with concentration varying in the range of 3–40 mg/ml were used in simulations. Moreover, the prostate and pelvic size were varied from 2.5 to 5.5 cm and 20 to 30 cm, respectively. The DER was defined as the ratio of the target dose with nanoparticle addition to the target dose without nanoparticle addition in the simulation. From the Monte Carlo results of DER, the best nanoparticle material with the highest DER was gold, based on all the nanoparticle concentrations and photon beams. Smaller prostate size, smaller pelvic size, and a higher nanoparticle concentration showed better DER results. When comparing energies, the 6 MV beams always had the greater enhancement ratio. In addition, the FFF photon beams always had a better DER when compared to the FF beams. It is concluded that gold nanoparticles were the most effective material in nanoparticle-enhanced radiotherapy. Moreover, lower photon beam energy (6 MV), FFF photon beam, higher nanoparticle concentration, smaller pelvic size, and smaller prostate size would all increase the DER in prostate nanoparticle-enhanced radiotherapy.
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Sharma M, C. L. Chow J. Skin dose enhancement from the application of skin-care creams using FF and FFF photon beams in radiotherapy: A Monte Carlo phantom evaluation. AIMS BIOENGINEERING 2020. [DOI: 10.3934/bioeng.2020008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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21
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Mututantri-Bastiyange D, C. L. Chow J. Imaging dose of cone-beam computed tomography in nanoparticle-enhanced image-guided radiotherapy: A Monte Carlo phantom study. AIMS BIOENGINEERING 2020. [DOI: 10.3934/bioeng.2020001] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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22
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Abdulle A, Chow JCL. Contrast Enhancement for Portal Imaging in Nanoparticle-Enhanced Radiotherapy: A Monte Carlo Phantom Evaluation Using Flattening-Filter-Free Photon Beams. NANOMATERIALS 2019; 9:nano9070920. [PMID: 31248046 PMCID: PMC6669570 DOI: 10.3390/nano9070920] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 06/19/2019] [Accepted: 06/20/2019] [Indexed: 12/02/2022]
Abstract
Our team evaluated contrast enhancement for portal imaging using Monte Carlo simulation in nanoparticle-enhanced radiotherapy. Dependencies of percentage contrast enhancement on flattening-filter (FF) and flattening-filter-free (FFF) photon beams were determined by varying the nanoparticle material (gold, platinum, iodine, silver, iron oxide), nanoparticle concentration (3–40 mg/mL) and photon beam energy (6 and 10 MV). Phase-space files and energy spectra of the 6 MV FF, 6 MV FFF, 10 MV FF and 10 MV FFF photon beams were generated based on a Varian TrueBeam linear accelerator. We found that gold and platinum nanoparticles (NP) produced the highest contrast enhancement for portal imaging, compared to other NP with lower atomic numbers. The maximum percentage contrast enhancements for the gold and platinum NP were 18.9% and 18.5% with a concentration equal to 40 mg/mL. The contrast enhancement was also found to increase with the nanoparticle concentration. The maximum rate of increase of contrast enhancement for the gold NP was equal to 0.29%/mg/mL. Using the 6 MV photon beams, the maximum contrast enhancements for the gold NP were 79% (FF) and 78% (FFF) higher than those using the 10 MV beams. For the FFF beams, the maximum contrast enhancements for the gold NP were 53.6% (6 MV) and 53.8% (10 MV) higher than those using the FF beams. It is concluded that contrast enhancement for portal imaging can be increased when a higher atomic number of NP, higher nanoparticle concentration, lower photon beam energy and no flattening filter of photon beam are used in nanoparticle-enhanced radiotherapy.
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Affiliation(s)
- Aniza Abdulle
- Department of Physics, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - James C L Chow
- Department of Radiation Oncology, University of Toronto and Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, ON M5T 1P5, Canada.
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Hespeels F, Heuskin AC, Tabarrant T, Scifoni E, Kraemer M, Chêne G, Strivay D, Lucas S. Backscattered electron emission after proton impact on gold nanoparticles with and without polymer shell coating. Phys Med Biol 2019; 64:125007. [PMID: 30986778 DOI: 10.1088/1361-6560/ab195f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This work aims at measuring experimentally proton induced secondary electron energy spectra after interaction with gold nano particles (GNPs) and polymer-coated GNPs. Backscattered electron energy spectra were collected over a 0 to 1000 eV energy range using a retarding field analyzer (RFA). This paper presents the spectra obtained for proton beam energies of 0.5 and 2 MeV and diameter 2.5 and 3.8 nm GNPs. The spectra were also measured for 3.8 nm GNPs after 5 and 10 MeV proton irradiations. GNPs were deposited on a 100 nm carbon film. Each experimental spectrum was compared with dedicated simulations based on existing numerical models used in the TRAX and Geant4 Monte Carlo codes. For 100 nm carbon target, good agreement between experimental, TRAX and Geant4 simulation results can be observed. For 3.8 nm GNPs, the TRAX simulations reproduce with good agreement the electron energy spectra produced after 0.5, 2, 5 and 10 MeV proton irradiations, while Geant4 spectra display a lower secondary electron yield at low energy (<600 eV) for all the studied energies. This underestimation can mostly be explained by the 790 eV threshold applied in the condensed history model used by Geant4 which impacts the secondary electron energy distribution. Results obtained for carbon and gold targets highlight the impact of the secondary electron production threshold for proton ionization process considered in condensed history models. The experimental results demonstrate that the single interaction approach used in TRAX is adapted to reproduce secondary electron emission from GNPs. On the other hand, the standard electron generation threshold implement in G4BetheBlochModel and G4BraggModel condensed-history models used in Geant4 is not adapted to reproduce low energy electron emission in gold targets. Finally, the results highlight that the GNP coating leads to a decrease of the electron yield and mostly affects low energy electrons (<500 eV) emitted from GNPs.
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Affiliation(s)
- F Hespeels
- University of Namur, PMR, 61 rue de Bruxelles, 5000 Namur, Belgium
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Kanwal Z, Raza MA, Manzoor F, Riaz S, Jabeen G, Fatima S, Naseem S. A Comparative Assessment of Nanotoxicity Induced by Metal (Silver, Nickel) and Metal Oxide (Cobalt, Chromium) Nanoparticles in Labeo rohita. NANOMATERIALS 2019; 9:nano9020309. [PMID: 30823536 PMCID: PMC6409703 DOI: 10.3390/nano9020309] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/09/2019] [Accepted: 02/14/2019] [Indexed: 12/12/2022]
Abstract
In the present in vivo study, we provide a comparison of toxicological consequences induced by four different types of spherical nanoparticles (NPs)—silver nanoparticles (AgNPs, 40 ± 6 nm), nickel (NiNPs, 43 ± 6 nm), cobalt oxide (Co3O4NPs, 60 ± 6 nm), and chromium oxide (Cr3O4NPs, 50 ± 5 nm)—on freshwater fish Labeo rohita. Fish were exposed to NPs (25 mg/L) for 21 days. We observed a NPs type-dependent toxicity in fish. An altered behavior showing signs of stress and a substantial reduction in total leukocyte count was noticed in all NP-treated groups. A low total erythrocyte count in all NP-treated fish except for Co3O4NPs was discerned while a low survival rate in the case of Cr3O4NP-treated fish was observed. A significant decrease in growth and hemoglobin were noticed in NiNP- and Cr3O4NP-treated fish. A considerable total protein elevation was detected in NiNP-, Co3O4NP-, and Cr3O4NP-treated groups. An upgrading in albumin level was witnessed in Co3O4NP- and Cr3O4NP-treated groups while a high level of globulin was noted in NiNP- and Co3O4NP-exposed groups. In all NP-treated groups, a depleted activity of antioxidative enzymes and pathological lesions in liver and kidney were noticed.
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Affiliation(s)
- Zakia Kanwal
- Department of Zoology, Faculty of Natural Science, Lahore College for Women University, Jail Road Lahore 54000, Pakistan.
| | - Muhammad Akram Raza
- Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan.
| | - Farkhanda Manzoor
- Department of Zoology, Faculty of Natural Science, Lahore College for Women University, Jail Road Lahore 54000, Pakistan.
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan.
| | - Ghazala Jabeen
- Department of Zoology, Faculty of Natural Science, Lahore College for Women University, Jail Road Lahore 54000, Pakistan.
| | - Shafaq Fatima
- Department of Zoology, Faculty of Natural Science, Lahore College for Women University, Jail Road Lahore 54000, Pakistan.
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan.
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