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Hooijman EL, Radchenko V, Ling SW, Konijnenberg M, Brabander T, Koolen SLW, de Blois E. Implementing Ac-225 labelled radiopharmaceuticals: practical considerations and (pre-)clinical perspectives. EJNMMI Radiopharm Chem 2024; 9:9. [PMID: 38319526 PMCID: PMC10847084 DOI: 10.1186/s41181-024-00239-1] [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: 07/20/2023] [Accepted: 01/25/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND In the past years, there has been a notable increase in interest regarding targeted alpha therapy using Ac-225, driven by the observed promising clinical anti-tumor effects. As the production and technology has advanced, the availability of Ac-225 is expected to increase in the near future, making the treatment available to patients worldwide. MAIN BODY Ac-225 can be labelled to different biological vectors, whereby the success of developing a radiopharmaceutical depends heavily on the labelling conditions, purity of the radionuclide source, chelator, and type of quenchers used to avoid radiolysis. Multiple (methodological) challenges need to be overcome when working with Ac-225; as alpha-emission detection is time consuming and highly geometry dependent, a gamma co-emission is used, but has to be in equilibrium with the mother-nuclide. Because of the high impact of alpha emitters in vivo it is highly recommended to cross-calibrate the Ac-225 measurements for used quality control (QC) techniques (radio-TLC, HPLC, HP-Ge detector, and gamma counter). More strict health physics regulations apply, as Ac-225 has a high toxicity, thereby limiting practical handling and quantities used for QC analysis. CONCLUSION This overview focuses specifically on the practical and methodological challenges when working with Ac-225 labelled radiopharmaceuticals, and underlines the required infrastructure and (detection) methods for the (pre-)clinical application.
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Affiliation(s)
- Eline L Hooijman
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
- Department of Hospital Pharmacy, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, Vancouver, BC, V6T 2A3, Canada
- Chemistry Department, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Sui Wai Ling
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
| | - Mark Konijnenberg
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
| | - Tessa Brabander
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
| | - Stijn L W Koolen
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
- Department of Hospital Pharmacy, Erasmus MC, 3015 CN, Rotterdam, The Netherlands
- Department of Medical Oncology, Erasmus MC Cancer Institute, 3015 CN, Rotterdam, The Netherlands
| | - Erik de Blois
- Department of Radiology and Nuclear Medicine, Erasmus MC, 3015 CN, Rotterdam, The Netherlands.
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2
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Erstling JA, Bag N, Gardinier TC, Kohle FFE, DomNwachukwu N, Butler SD, Kao T, Ma K, Turker MZ, Feuer GB, Lee R, Naguib N, Tallman JF, Malarkey HF, Tsaur L, Moore WL, Chapman DV, Aubert T, Mehta S, Cerione RA, Weiss RS, Baird BA, Wiesner UB. Overcoming Barriers Associated with Oral Delivery of Differently Sized Fluorescent Core-Shell Silica Nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305937. [PMID: 37689973 DOI: 10.1002/adma.202305937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/07/2023] [Indexed: 09/11/2023]
Abstract
Oral delivery, while a highly desirable form of nanoparticle-drug administration, is limited by challenges associated with overcoming several biological barriers. Here, the authors study how fluorescent and poly(ethylene glycol)-coated (PEGylated) core-shell silica nanoparticles sized 5 to 50 nm interact with major barriers including intestinal mucus, intestinal epithelium, and stomach acid. From imaging fluorescence correlation spectroscopy studies using quasi-total internal reflection fluorescence microscopy, diffusion of nanoparticles through highly scattering mucus is progressively hindered above a critical hydrodynamic size around 20 nm. By studying Caco-2 cell monolayers mimicking the intestinal epithelia, it is observed that ultrasmall nanoparticles below 10 nm diameter (Cornell prime dots, [C' dots]) show permeabilities correlated with high absorption in humans from primarily enhanced passive passage through tight junctions. Particles above 20 nm diameter exclusively show active transport through cells. After establishing C' dot stability in artificial gastric juice, in vivo oral gavage experiments in mice demonstrate successful passage through the body followed by renal clearance without protein corona formation. Results suggest C' dots as viable candidates for oral administration to patients with a proven pathway towards clinical translation and may generate renewed interest in examining silica as a food additive and its effects on nutrition and health.
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Affiliation(s)
- Jacob A Erstling
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Nirmalya Bag
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Thomas C Gardinier
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Ferdinand F E Kohle
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Naedum DomNwachukwu
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Scott D Butler
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Teresa Kao
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Kai Ma
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Melik Z Turker
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Grant B Feuer
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Rachel Lee
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Nada Naguib
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - James F Tallman
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Henry F Malarkey
- Department of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA
| | - Lieihn Tsaur
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - William L Moore
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Dana V Chapman
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Tangi Aubert
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Saurabh Mehta
- Center for Precision Nutrition and Health, Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Richard A Cerione
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Robert S Weiss
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Barbara A Baird
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Ulrich B Wiesner
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, 14853, USA
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3
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Su D, Djureinovic D, Schoenfeld D, Marquez-Nostra B, Olino K, Jilaveanu L, Kluger H. Melanocortin 1 receptor (MC1R) expression as a marker of progression in melanoma. RESEARCH SQUARE 2023:rs.3.rs-3314825. [PMID: 37790306 PMCID: PMC10543287 DOI: 10.21203/rs.3.rs-3314825/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Melanocortin-1 receptor (MC1R) plays a critical role in human pigmentation and DNA repair mechanisms. MC1R-targeting agents are being investigated in clinical trials in melanoma patients, yet large studies investigating the rate and degree of MC1R expression in primary and metastatic human melanoma tissue are lacking. Using tissue microarrays containing three large cohorts of 225 cases of benign nevi, 189 with primary melanoma, and 271 with metastatic melanoma, we applied quantitative immunofluorescence and immunohistochemistry to comprehensively study MC1R protein expression. We show a stepwise elevation of MC1R expression in different stages of melanoma progression (nevi, primary, metastasis). Higher MC1R expression was seen in deeper (>1 mm) primary lesions, ulcerated lesions, and mucosal melanomas compared to cutaneous melanomas and was associated with shorter survival in primary and metastatic tumors. On multi-variable analysis, Breslow thickness, ulceration, male sex, and chronic sun exposure were independent predictors of worse overall survival in the primary melanoma cohort. In the metastatic melanoma cohort, MC1R expression and mucosal melanomas were independent predictors of inferior overall survival. Our data suggest that MC1R might be a valuable drug target in aggressive melanoma. Additional studies are warranted to determine its functional significance in melanoma progression and its utility as a predictive biomarker in patients receiving MC1R-directed therapies.
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Affiliation(s)
- David Su
- Division of Surgical Oncology, Yale University School of Medicine, New Haven, CT
| | - Dijana Djureinovic
- Division of Medical Oncology, Yale University School of Medicine, New Haven, CT
| | - David Schoenfeld
- Division of Medical Oncology, Yale University School of Medicine, New Haven, CT
| | - Bernadette Marquez-Nostra
- Department of Radiology, Division of Advanced Medical Imaging Research, University of Alabama at Birmingham, Birmingham, AL
| | - Kelly Olino
- Division of Surgical Oncology, Yale University School of Medicine, New Haven, CT
| | - Lucia Jilaveanu
- Division of Medical Oncology, Yale University School of Medicine, New Haven, CT
| | - Harriet Kluger
- Division of Medical Oncology, Yale University School of Medicine, New Haven, CT
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Nakamura M, Nakamura J, Mochizuki C, Kuroda C, Kato S, Haruta T, Kakefuda M, Sato S, Tamanoi F, Sugino N. Analysis of cell-nanoparticle interactions and imaging of in vitro labeled cells showing barcorded endosomes using fluorescent thiol-organosilica nanoparticles surface-functionalized with polyethyleneimine. NANOSCALE ADVANCES 2022; 4:2682-2703. [PMID: 36132282 PMCID: PMC9417756 DOI: 10.1039/d1na00839k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 04/18/2022] [Indexed: 06/15/2023]
Abstract
Biomedical imaging using cell labeling is an important technique to visualize cell dynamics in the body. To label cells, thiol-organosilica nanoparticles (thiol-OS) containing fluorescein (thiol-OS/Flu) and rhodamine B (thiol-OS/Rho) were surface-functionalized with polyethyleneimine (PEI) (OS/Flu-PEI and OS/Rho-PEI) with 4 molecular weights (MWs). We hypothesized PEI structures such as brush, bent brush, bent lie-down, and coiled types on the surface depending on MWs based on dynamic light scattering and thermal gravimetric analyses. The labeling efficacy of OS/Flu-PEIs was dependent on the PEI MW and the cell type. A dual-particle administration study using thiol-OS and OS-PEIs revealed differential endosomal sorting of the particles depending on the surface of the NPs. The endosomes in the labeled cells using OS/Flu-PEI and thiol-OS/Rho revealed various patterns of fluorescence termed barcoded endosomes. The cells labeled with OS-PEI in vitro were administrated to mice intraperitoneally after in situ labeling of peritoneal cells using thiol-OS/Rho. The in vitro labeled cells were detected and identified in cell aggregates in vivo seamlessly. The labeled cells with barcoded endosomes were also identified in cell aggregates. Biomedical imaging of in vitro OS-PEI-labeled cells combined with in situ labeled cells showed high potential for observation of cell dynamics.
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Affiliation(s)
- Michihiro Nakamura
- Department of Organ Anatomy and Nanomedicine, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | - Junna Nakamura
- Department of Organ Anatomy and Nanomedicine, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | - Chihiro Mochizuki
- Department of Organ Anatomy and Nanomedicine, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | - Chika Kuroda
- Department of Organ Anatomy and Nanomedicine, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | - Shigeki Kato
- Department of Organ Anatomy and Nanomedicine, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | | | - Mayu Kakefuda
- EM Application Group, EM Business Unit, JEOL Ltd. Japan
| | - Shun Sato
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
| | - Fuyuhiko Tamanoi
- Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles CA 90095 USA
- Institute for Integrated Cell-Material Sciences, Institute for Advanced Study, Kyoto University Yoshida-Honmachi, Sakyo-ku Kyoto 606-8501 Japan
| | - Norihiro Sugino
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Yamaguchi University 1-1-1 Minami-Kogushi Ube Yamaguchi 755-8505 Japan
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Radiobiology of Targeted Alpha Therapy. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00093-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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6
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Lee R, Erstling JA, Hinckley JA, Chapman DV, Wiesner UB. Addressing Particle Compositional Heterogeneities in Super-Resolution-Enhanced Live-Cell Ratiometric pH Sensing with Ultrasmall Fluorescent Core-Shell Aluminosilicate Nanoparticles. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2106144. [PMID: 34899116 PMCID: PMC8659865 DOI: 10.1002/adfm.202106144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Indexed: 06/13/2023]
Abstract
The interrogation of metabolic parameters like pH in live-cell experiments using optical super-resolution microscopy (SRM) remains challenging. This is due to a paucity of appropriate metabolic probes enabling live-cell SRM-based sensing. Here we introduce ultrasmall fluorescent core-shell aluminosilicate nanoparticle sensors (FAM-ATTO647N aC' dots) that covalently encapsulate a reference dye (ATTO647N) in the core and a pH-sensing moiety (FAM) in the shell. Only the reference dye exhibits optical blinking enabling live-cell stochastic optical reconstruction microscopy (STORM). Using data from cells incubated for 60 minutes with FAM-ATTO647N aC' dots, pixelated information from total internal reflection fluorescence (TIRF) microscopy-based ratiometric sensing can be combined with that from STORM-based localizations via the blinking reference dye in order to enhance the resolution of ratiometric pH sensor maps beyond the optical diffraction limit. A nearest-neighbor interpolation methodology is developed to quantitatively address particle compositional heterogeneity as determined by separate single-particle fluorescence imaging methods. When combined with STORM-based estimates of the number of particles per vesicle, vesicle size, and vesicular motion as a whole, this analysis provides detailed live-cell spatial and functional information, paving the way to a comprehensive mapping and understanding of the spatiotemporal evolution of nanoparticle processing by cells important, e.g. for applications in nanomedicine.
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Affiliation(s)
- Rachel Lee
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jacob A Erstling
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States; Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Joshua A Hinckley
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States; Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Dana V Chapman
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ulrich B Wiesner
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
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7
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Erstling JA, Hinckley JA, Bag N, Hersh J, Feuer GB, Lee R, Malarkey HF, Yu F, Ma K, Baird BA, Wiesner UB. Ultrasmall, Bright, and Photostable Fluorescent Core-Shell Aluminosilicate Nanoparticles for Live-Cell Optical Super-Resolution Microscopy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006829. [PMID: 33470471 PMCID: PMC7936654 DOI: 10.1002/adma.202006829] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/07/2020] [Indexed: 06/12/2023]
Abstract
Stochastic optical reconstruction microscopy (STORM) is an optical super-resolution microscopy (SRM) technique that traditionally requires toxic and non-physiological imaging buffers and setups that are not conducive to live-cell studies. It is observed that ultrasmall (<10 nm) fluorescent core-shell aluminosilicate nanoparticles (aC' dots) covalently encapsulating organic fluorophores enable STORM with a single excitation source and in a regular (non-toxic) imaging buffer. It is shown that fourfold coordinated aluminum is responsible for dye blinking, likely via photoinduced redox processes. It is demonstrated that this phenomenon is observed across different dye families leading to probes brighter and more photostable than the parent free dyes. Functionalization of aC' dots with antibodies allows targeted fixed cell STORM imaging. Finally, aC' dots enable live-cell STORM imaging providing quantitative measures of the size of intracellular vesicles and the number of particles per vesicle. The results suggest the emergence of a powerful ultrasmall, bright, and photostable optical SRM particle platform with characteristics relevant to clinical translation for the quantitative assessment of cellular structures and processes from live-cell imaging.
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Affiliation(s)
- Jacob A Erstling
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Joshua A Hinckley
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Nirmalya Bag
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Jessica Hersh
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Grant B Feuer
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Rachel Lee
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Henry F Malarkey
- Department of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA
| | - Fei Yu
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Kai Ma
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Barbara A Baird
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Ulrich B Wiesner
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
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8
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The Potentiation of Anti-Tumor Immunity by Tumor Abolition with Alpha Particles, Protons, or Carbon Ion Radiation and Its Enforcement by Combination with Immunoadjuvants or Inhibitors of Immune Suppressor Cells and Checkpoint Molecules. Cells 2021; 10:cells10020228. [PMID: 33503958 PMCID: PMC7912488 DOI: 10.3390/cells10020228] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/24/2022] Open
Abstract
The delivery of radiation therapy (RT) for cancer with intent to cure has been optimized and standardized over the last 80 years. Both preclinical and clinical work emphasized the observation that radiation destroys the tumor and exposes its components to the immune response in a mode that facilitates the induction of anti-tumor immunity or reinforces such a response. External beam photon radiation is the most prevalent in situ abolition treatment, and its use exposed the “abscopal effect”. Particle radiotherapy (PRT), which has been in various stages of research and development for 70 years, is today available for the treatment of patients in the form of alpha particles, proton, or carbon ion radiotherapy. Charged particle radiotherapy is based on the acceleration of charged species, such as protons or carbon-12, which deposit their energy in the treated tumor and have a higher relative biological effectiveness compared with photon radiation. In this review, we will bring evidence that alpha particles, proton, or carbon ion radiation can destroy tumors and activate specific anti-tumor immune responses. Radiation may also directly affect the distribution and function of immune cells such as T cells, regulatory T cells, and mononuclear phagocytes. Tumor abolition by radiation can trigger an immune response against the tumor. However, abolition alone rarely induces effective anti-tumor immunity resulting in systemic tumor rejection. Immunotherapy can complement abolition to reinforce the anti-tumor immunity to better eradicate residual local and metastatic tumor cells. Various methods and agents such as immunoadjuvants, suppressor cell inhibitors, or checkpoint inhibitors were used to manipulate the immune response in combination with radiation. This review deals with the manifestations of particle-mediated radiotherapy and its correlation with immunotherapy of cancer.
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9
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Affiliation(s)
- J Harvey Turner
- Faculty of Health and Medical Sciences, Medical School, The University of Western Australia, Perth, Australia
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10
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Hatcher-Lamarre JL, Sanders VA, Rahman M, Cutler CS, Francesconi LC. Alpha emitting nuclides for targeted therapy. Nucl Med Biol 2021; 92:228-240. [PMID: 33558017 PMCID: PMC8363053 DOI: 10.1016/j.nucmedbio.2020.08.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 02/07/2023]
Abstract
Targeted alpha therapy (TAT) is an area of research with rapidly increasing importance as the emitted alpha particle has a significant effect on inducing cytotoxic effects on tumor cells while mitigating dose to normal tissues. Two significant isotopes of interest within the area of TAT are thorium-227 and actinium-225 due to their nuclear characteristics. Both isotopes have physical half-lives suitable for coordination with larger biomolecules, and additionally actinium-225 has potential to serve as an in vivo generator. In this review, the authors will discuss the production, purification, labeling reactions, and biological studies of actinium-225 and thorium-227 complexes and clinical studies.
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Affiliation(s)
| | - Vanessa A Sanders
- Collider Accelerator Department, Brookhaven National Laboratory, USA
| | - Mohammed Rahman
- Chemistry Department, Hunter College of the City University of New York, USA
| | - Cathy S Cutler
- Collider Accelerator Department, Brookhaven National Laboratory, USA
| | - Lynn C Francesconi
- Chemistry Department, Hunter College of the City University of New York, USA; Chemistry Department, Graduate Center of the City University of New York, USA.
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11
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Miao Y, Quinn TP. Advances in Receptor-Targeted Radiolabeled Peptides for Melanoma Imaging and Therapy. J Nucl Med 2020; 62:313-318. [PMID: 33277401 DOI: 10.2967/jnumed.120.243840] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 11/20/2020] [Indexed: 12/29/2022] Open
Abstract
Melanocortin-1 receptor (MC1R) and very late antigen-4 (VLA-4, integrin α4β1) are 2 attractive molecular targets for developing peptide radiopharmaceuticals for melanoma imaging and therapy. MC1R- and VLA-4-targeting peptides and peptide-conjugated Cornell prime dots (C' dots) can serve as delivery vehicles to target both diagnostic and therapeutic radionuclides to melanoma cells for imaging and therapy. This review highlights the advances of MC1R- and VLA-4-targeted radiolabeled peptides and peptide-conjugated C' dots for melanoma imaging and therapy. The promising preclinical and clinical results of these new peptide radiopharmaceuticals present an optimistic outlook for clinical translation into receptor-targeting melanoma imaging and radionuclide therapy in the future.
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Affiliation(s)
- Yubin Miao
- Department of Radiology, School of Medicine, University of Colorado Denver, Aurora, Colorado; and
| | - Thomas P Quinn
- Department of Biochemistry, University of Missouri-Columbia, and Harry S. Truman Veterans' Hospital, Columbia, Missouri
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12
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Controllable synthesis of versatile mesoporous organosilica nanoparticles as precision cancer theranostics. Biomaterials 2020; 256:120191. [PMID: 32593907 DOI: 10.1016/j.biomaterials.2020.120191] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 05/18/2020] [Accepted: 06/09/2020] [Indexed: 12/16/2022]
Abstract
Despite the advantages of mesoporous silica nanoparticles (MSNs) in drug delivery, the inherent non-biodegradability seriously impedes the clinical translation of inorganic MSNs, so the current research focus has been turned to mesoporous organosilica nanoparticles (MONs) with higher biocompatibility and easier biodegradability. Recent remarkable advances in silica fabrication chemistry have catalyzed the emergence of a library of MONs with various structures and functions. This review will summarize the latest state-of-the-art studies on the precise control of morphology, structure, framework, particle size and pore size of MONs, which enables the precise synthesis of MONs with suitable engineering for precision stimuli-responsive drug delivery/release, bioimaging and synergistic therapy. Besides, the potential challenges about the future development of MONs are also outlooked with the intention of attracting more researchers to promote the clinical translation of MONs.
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13
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Zhang X, Chen F, Turker MZ, Ma K, Zanzonico P, Gallazzi F, Shah MA, Prater AR, Wiesner U, Bradbury MS, McDevitt MR, Quinn TP. Targeted melanoma radiotherapy using ultrasmall 177Lu-labeled α-melanocyte stimulating hormone-functionalized core-shell silica nanoparticles. Biomaterials 2020; 241:119858. [PMID: 32120314 DOI: 10.1016/j.biomaterials.2020.119858] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 01/27/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023]
Abstract
Lutetium-177 (177Lu) radiolabeled ultrasmall (~6 nm dia.) fluorescent core-shell silica nanoparticles (Cornell prime dots or C' dots) were developed for improving efficacy of targeted radiotherapy in melanoma models. PEGylated C' dots were surface engineered to display 10-15 alpha melanocyte stimulating hormone (αMSH) cyclic peptide analogs for targeting the melanocortin-1 receptor (MC1-R) over-expressed on melanoma tumor cells. The 177Lu-DOTA-αMSH-PEG-C' dot product was radiochemically stable, biologically active, and exhibited high affinity cellular binding properties and internalization. Selective tumor uptake and favorable biodistribution properties were also demonstrated, in addition to bulk renal clearance, in syngeneic B16F10 and human M21 xenografted models. Prolonged survival was observed in the treated cohorts relative to controls. Dosimetric analysis showed no excessively high absorbed dose among normal organs. Correlative histopathology of ex vivo treated tumor specimens revealed expected necrotic changes; no acute pathologic findings were noted in the liver or kidneys. Collectively, these results demonstrated that 177Lu-DOTA-αMSH-PEG-C' dot targeted melanoma therapy overcame the unfavorable biological properties and dose-limiting toxicities associated with existing mono-molecular treatments. The unique and tunable surface chemistries of this targeted ultrasmall radiotherapeutic, coupled with its favorable pharmacokinetic properties, substantially improved treatment efficacy and demonstrated a clear survival benefit in melanoma models, which supports its further clinical translation.
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Affiliation(s)
- Xiuli Zhang
- Harry S. Truman Veterans' Hospital, 800 Hospital Dr., Columbia, MO 65201, United States; Department of Biochemistry, University of Missouri, Columbia, MO 65211, United States
| | - Feng Chen
- Department of Radiology, Sloan Kettering Institute for Cancer Research, New York, NY 10065, United States
| | - Melik Z Turker
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, United States
| | - Kai Ma
- Elucida Oncology, New York, NY 10016, United States
| | - Pat Zanzonico
- Department of Medical Physics, Sloan Kettering Institute for Cancer Research, New York, NY 10065, United States
| | - Fabio Gallazzi
- Department of Chemistry and Research Core Facilities, University of Missouri, Columbia, MO 65211, United States
| | - Manankumar A Shah
- Harry S. Truman Veterans' Hospital, 800 Hospital Dr., Columbia, MO 65201, United States; Department of Biochemistry, University of Missouri, Columbia, MO 65211, United States
| | - Austin R Prater
- Harry S. Truman Veterans' Hospital, 800 Hospital Dr., Columbia, MO 65201, United States; Department of Biochemistry, University of Missouri, Columbia, MO 65211, United States
| | - Ulrich Wiesner
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, United States
| | - Michelle S Bradbury
- Department of Radiology, Sloan Kettering Institute for Cancer Research, New York, NY 10065, United States; Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, New York, NY 10065, United States
| | - Michael R McDevitt
- Department of Radiology, Sloan Kettering Institute for Cancer Research, New York, NY 10065, United States
| | - Thomas P Quinn
- Harry S. Truman Veterans' Hospital, 800 Hospital Dr., Columbia, MO 65201, United States; Department of Biochemistry, University of Missouri, Columbia, MO 65211, United States.
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