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Leland P, Kumar D, Nimmagadda S, Bauer SR, Puri RK, Joshi BH. Characterization of chimeric antigen receptor modified T cells expressing scFv-IL-13Rα2 after radiolabeling with 89Zirconium oxine for PET imaging. J Transl Med 2023; 21:367. [PMID: 37286997 PMCID: PMC10246418 DOI: 10.1186/s12967-023-04142-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 04/19/2023] [Indexed: 06/09/2023] Open
Abstract
BACKGROUND Chimeric antigen receptor (CAR) T cell therapy is an exciting cell-based cancer immunotherapy. Unfortunately, CAR-T cell therapy is associated with serious toxicities such as cytokine release syndrome (CRS) and neurotoxicity. The mechanism of these serious adverse events (SAEs) and how homing, distribution and retention of CAR-T cells contribute to toxicities is not fully understood. Enabling in vitro methods to allow meaningful, sensitive in vivo biodistribution studies is needed to better understand CAR-T cell disposition and its relationship to both effectiveness and safety of these products. METHODS To determine if radiolabelling of CAR-T cells could support positron emission tomography (PET)-based biodistribution studies, we labeled IL-13Rα2 targeting scFv-IL-13Rα2-CAR-T cells (CAR-T cells) with 89Zirconium-oxine (89Zr-oxine) and characterized and compared their product attributes with non-labeled CAR-T cells. The 89Zr-oxine labeling conditions were optimized for incubation time, temperature, and use of serum for labeling. In addition, T cell subtype characterization and product attributes of radiolabeled CAR-T cells were studied to assess their overall quality including cell viability, proliferation, phenotype markers of T-cell activation and exhaustion, cytolytic activity and release of interferon-γ upon co-culture with IL-13Rα2 expressing glioma cells. RESULTS We observed that radiolabeling of CAR-T cells with 89Zr-oxine is quick, efficient, and radioactivity is retained in the cells for at least 8 days with minimal loss. Also, viability of radiolabeled CAR-T cells and subtypes such as CD4 + , CD8 + and scFV-IL-13Rα2 transgene positive T cell population were characterized and found similar to that of unlabeled cells as determined by TUNEL assay, caspase 3/7 enzyme and granzyme B activity assay. Moreover, there were no significant changes in T cell activation (CD24, CD44, CD69 and IFN-γ) or T cell exhaustion (PD-1, LAG-3 and TIM3) markers expression between radiolabeled and unlabeled CAR-T cells. In chemotaxis assays, migratory capability of radiolabeled CAR-T cells to IL-13Rα2Fc was similar to that of non-labeled cells. CONCLUSIONS Importantly, radiolabeling has minimal impact on biological product attributes including potency of CAR-T cells towards IL-13Rα2 positive tumor cells but not IL-13Rα2 negative cells as measured by cytolytic activity and release of IFN-γ. Thus, IL-13Rα2 targeting CAR-T cells radiolabeled with 89Zr-oxine retain critical product attributes and suggest 89Zr-oxine radiolabeling of CAR-T cells may facilitate biodistribution and tissue trafficking studies in vivo using PET.
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Affiliation(s)
- Pamela Leland
- Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Office of Tissues and Advance Therapies, Center for Biologics Evaluation and Research, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA
| | - Dhiraj Kumar
- Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sridhar Nimmagadda
- Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Steven R Bauer
- Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Office of Tissues and Advance Therapies, Center for Biologics Evaluation and Research, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA
- Wake Forest Institute of Regenerative Medicine, Winston Salem, North Caroline, USA
| | - Raj K Puri
- Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Office of Tissues and Advance Therapies, Center for Biologics Evaluation and Research, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA
- Iovance Biotherapeutics, San Carlos, CA, USA
| | - Bharat H Joshi
- Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Office of Tissues and Advance Therapies, Center for Biologics Evaluation and Research, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA.
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2
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Leland P, Kumar D, Nimaggada S, Bauer SR, Puri RK, Joshi BH. Characterization of Chimeric Antigen Receptor Modified T Cells Expressing scFv-IL-13Rα2 after Radiolabeling with 89Zirconium Oxine for PET Imaging. RESEARCH SQUARE 2023:rs.3.rs-2242559. [PMID: 36711796 PMCID: PMC9882610 DOI: 10.21203/rs.3.rs-2242559/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Background Chimeric antigen receptor (CAR) T cell therapy is an exciting cell-based cancer immunotherapy. Unfortunately, CAR-T cell therapy is associated with serious toxicities such as cytokine release syndrome (CRS) and neurotoxicity. The mechanism of these serious adverse events (SAEs) and how homing, distribution and retention of CAR-T cells contribute to toxicities is not fully understood. Methods To determine if radiolabelling of CAR-T cells could support positron emission tomography (PET)-based biodistribution studies, we labeled IL-13Rα2 targeting scFv-IL-13Rα2-CAR-T cells (CAR-T cells) with 89 Zirconium-oxine ( 89 Zr-oxine), and characterized and compared their product attributes with non-labeled CAR-T cells. The 89 Zr-oxine labeling conditions were optimized for incubation time, temperature, and use of serum for labeling. In addition, product attributes of radiolabeled CAR-T cells were studied to assess their overall quality including cell viability, proliferation, phenotype markers of T-cell activation and exhaustion, cytolytic activity and release of interferon-γ upon co-culture with IL-13Rα2 expressing glioma cells. Results We observed that radiolabeling of CAR-T cells with 89 Zr-oxine is quick, efficient, and radioactivity is retained in the cells for at least 8 days with minimal loss. Also, viability of radiolabeled CAR-T cells was similar to that of unlabeled cells as determined by TUNEL assay and caspase 3/7 enzyme activity assay. Moreover, there were no significant changes in T cell activation (CD24, CD44, CD69 and IFN-γ) or T cell exhaustion(PD-1, LAG-3 and TIM3) markers expression between radiolabeled and unlabeled CAR-T cells. In chemotaxis assays, migratory capability of radiolabeled CAR-T cells to IL-13Rα2Fc was similar to that of non-labeled cells. Conclusions Importantly, radiolabeling has minimal impact on biological product attributes including potency of CAR-T cells towards IL-13Rα2 positive tumor cells but not IL-13Rα2 negative cells as measured by cytolytic activity and release of IFN-γ. Thus, IL-13Rα2 targeting CAR-T cells radiolabeled with 89 Zr-oxine retain critical product attributes and suggest 89 Zr-oxine radiolabeling of CAR-T cells may facilitate biodistribution and tissue trafficking studies in vivo using PET.
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Affiliation(s)
| | - Dhiraj Kumar
- Johns Hopkins Medicine School of Medicine: Johns Hopkins University School of Medicine
| | | | | | - Raj K Puri
- Center for Biologics Evaluation and Research
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3
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Gawne PJ, Man F, Blower PJ, T M de Rosales R. Direct Cell Radiolabeling for in Vivo Cell Tracking with PET and SPECT Imaging. Chem Rev 2022; 122:10266-10318. [PMID: 35549242 PMCID: PMC9185691 DOI: 10.1021/acs.chemrev.1c00767] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The arrival of cell-based therapies is a revolution in medicine. However, its safe clinical application in a rational manner depends on reliable, clinically applicable methods for determining the fate and trafficking of therapeutic cells in vivo using medical imaging techniques─known as in vivo cell tracking. Radionuclide imaging using single photon emission computed tomography (SPECT) or positron emission tomography (PET) has several advantages over other imaging modalities for cell tracking because of its high sensitivity (requiring low amounts of probe per cell for imaging) and whole-body quantitative imaging capability using clinically available scanners. For cell tracking with radionuclides, ex vivo direct cell radiolabeling, that is, radiolabeling cells before their administration, is the simplest and most robust method, allowing labeling of any cell type without the need for genetic modification. This Review covers the development and application of direct cell radiolabeling probes utilizing a variety of chemical approaches: organic and inorganic/coordination (radio)chemistry, nanomaterials, and biochemistry. We describe the key early developments and the most recent advances in the field, identifying advantages and disadvantages of the different approaches and informing future development and choice of methods for clinical and preclinical application.
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Affiliation(s)
- Peter J Gawne
- School of Biomedical Engineering & Imaging Sciences, King's College London, St Thomas' Hospital, London, SE1 7EH, U.K
| | - Francis Man
- School of Biomedical Engineering & Imaging Sciences, King's College London, St Thomas' Hospital, London, SE1 7EH, U.K.,Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Sciences, King's College London, London, SE1 9NH, U.K
| | - Philip J Blower
- School of Biomedical Engineering & Imaging Sciences, King's College London, St Thomas' Hospital, London, SE1 7EH, U.K
| | - Rafael T M de Rosales
- School of Biomedical Engineering & Imaging Sciences, King's College London, St Thomas' Hospital, London, SE1 7EH, U.K
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Kiraga Ł, Kucharzewska P, Paisey S, Cheda Ł, Domańska A, Rogulski Z, Rygiel TP, Boffi A, Król M. Nuclear imaging for immune cell tracking in vivo – Comparison of various cell labeling methods and their application. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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5
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Metabolic Labeling of Live Stem Cell for In Vitro Imaging and In Vivo Tracking. Methods Mol Biol 2021. [PMID: 30997638 DOI: 10.1007/7651_2019_224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Stem cell therapy offers promising solutions to diseases and injuries that traditional medicines and therapies can't effectively cure. To get and explain their full therapeutic potentials, the survival, viability, integration, homing, and differentiation of stem cells after transplant must be clearly understood. To meet these urgent needs, noninvasive stem cell imaging and tracking technologies have been developed. Metabolic labeling technique is one of the most powerful tools for live cell imaging and tracking. In addition, it has many advantages for in vivo live cell imaging and tracking such as low background, correlation of survival, and very toxic and nontoxic by-products. Herein, we described the fundamental information and process of metabolic labeling techniques and suggested optimal condition for in vitro and in vivo imaging and tracking of human umbilical cord blood-derived endothelial progenitor cells (hUCB-EPCs). Based on this study, metabolic labeling techniques can be helpful for understanding the safety and effectiveness of stem cell-based therapy and determining the utility of stem cells in downstream experiments.
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Volpe A, Pillarsetty NVK, Lewis JS, Ponomarev V. Applications of nuclear-based imaging in gene and cell therapy: probe considerations. MOLECULAR THERAPY-ONCOLYTICS 2021; 20:447-458. [PMID: 33718593 PMCID: PMC7907215 DOI: 10.1016/j.omto.2021.01.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/26/2021] [Indexed: 01/11/2023]
Abstract
Several types of gene- and cell-based therapeutics are now emerging in the cancer immunotherapy, transplantation, and regenerative medicine landscapes. Radionuclear-based imaging can be used as a molecular imaging tool for repetitive and non-invasive visualization as well as in vivo monitoring of therapy success. In this review, we discuss the principles of nuclear-based imaging and provide a comprehensive overview of its application in gene and cell therapy. This review aims to inform investigators in the biomedical field as well as clinicians on the state of the art of nuclear imaging, from probe design to available radiopharmaceuticals and advances of direct (probe-based) and indirect (transgene-based) strategies in both preclinical and clinical settings. Notably, as the nuclear-based imaging toolbox is continuously expanding, it will be increasingly incorporated into the clinical setting where the distribution, targeting, and persistence of a new generation of therapeutics can be imaged and ultimately guide therapeutic decisions.
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Affiliation(s)
- Alessia Volpe
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Naga Vara Kishore Pillarsetty
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Weill Cornell Medical College, New York, NY, USA
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Weill Cornell Medical College, New York, NY, USA
| | - Vladimir Ponomarev
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Weill Cornell Medical College, New York, NY, USA
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7
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Chandy M, Wu JC. Molecular Imaging of Stem Cell Therapy in Ischemic Cardiomyopathy. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00065-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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8
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Jacquemin M, Broggio D, Franck D, Desbrée A. Development of a dosimetric model for in vitro labelled cells with β + emitters in PET tracking studies. ACTA ACUST UNITED AC 2019; 64:155015. [DOI: 10.1088/1361-6560/ab2cbe] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Kiru L, Kim TJ, Shen B, Chin FT, Pratx G. Single-Cell Imaging Using Radioluminescence Microscopy Reveals Unexpected Binding Target for [18F]HFB. Mol Imaging Biol 2019; 20:378-387. [PMID: 29143174 DOI: 10.1007/s11307-017-1144-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
PURPOSE Cell-based therapies are showing great promise for a variety of diseases, but remain hindered by the limited information available regarding the biological fate, migration routes and differentiation patterns of infused cells in trials. Previous studies have demonstrated the feasibility of using positron emission tomography (PET) to track single cells utilising an approach known as positron emission particle tracking (PEPT). The radiolabel hexadecyl-4-[18F]fluorobenzoate ([18F]HFB) was identified as a promising candidate for PEPT, due to its efficient and long-lasting labelling capabilities. The purpose of this work was to characterise the labelling efficiency of [18F]HFB in vitro at the single-cell level prior to in vivo studies. PROCEDURES The binding efficiency of [18F]HFB to MDA-MB-231 and Jurkat cells was verified in vitro using bulk gamma counting. The measurements were subsequently repeated in single cells using a new method known as radioluminescence microscopy (RLM) and binding of the radiolabel to the single cells was correlated with various fluorescent dyes. RESULTS Similar to previous reports, bulk cell labelling was significantly higher with [18F]HFB (18.75 ± 2.47 dpm/cell, n = 6) than 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) (7.59 ± 0.73 dpm/cell, n = 7; p ≤ 0.01). However, single-cell imaging using RLM revealed that [18F]HFB accumulation in live cells (8.35 ± 1.48 cpm/cell, n = 9) was not significantly higher than background levels (4.83 ± 0.52 cpm/cell, n = 12; p > 0.05) and was 1.7-fold lower than [18F]FDG uptake in the same cell line (14.09 ± 1.90 cpm/cell, n = 13; p < 0.01). Instead, [18F]HFB was found to bind significantly to fragmented membranes associated with dead cell nuclei, suggesting an alternative binding target for [18F]HFB. CONCLUSION This study demonstrates that bulk analysis alone does not always accurately portray the labelling efficiency, therefore highlighting the need for more routine screening of radiolabels using RLM to identify heterogeneity at the single-cell level.
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Affiliation(s)
- Louise Kiru
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA
| | - Tae Jin Kim
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA
| | - Bin Shen
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA
| | - Frederick T Chin
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA
| | - Guillem Pratx
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA.
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10
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Park J, Andrade B, Seo Y, Kim MJ, Zimmerman SC, Kong H. Engineering the Surface of Therapeutic "Living" Cells. Chem Rev 2018; 118:1664-1690. [PMID: 29336552 DOI: 10.1021/acs.chemrev.7b00157] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biological cells are complex living machines that have garnered significant attention for their potential to serve as a new generation of therapeutic and delivery agents. Because of their secretion, differentiation, and homing activities, therapeutic cells have tremendous potential to treat or even cure various diseases and injuries that have defied conventional therapeutic strategies. Therapeutic cells can be systemically or locally transplanted. In addition, with their ability to express receptors that bind specific tissue markers, cells are being studied as nano- or microsized drug carriers capable of targeted transport. Depending on the therapeutic targets, these cells may be clustered to promote intercellular adhesion. Despite some impressive results with preclinical studies, there remain several obstacles to their broader development, such as a limited ability to control their transport, engraftment, secretion and to track them in vivo. Additionally, creating a particular spatial organization of therapeutic cells remains difficult. Efforts have recently emerged to resolve these challenges by engineering cell surfaces with a myriad of bioactive molecules, nanoparticles, and microparticles that, in turn, improve the therapeutic efficacy of cells. This review article assesses the various technologies developed to engineer the cell surfaces. The review ends with future considerations that should be taken into account to further advance the quality of cell surface engineering.
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Affiliation(s)
| | | | | | - Myung-Joo Kim
- Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University , Seoul 110-749, Korea
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Langford ST, Wiggins CS, Santos R, Hauser M, Becker JM, Ruggles AE. Three-dimensional spatiotemporal tracking of fluorine-18 radiolabeled yeast cells via positron emission particle tracking. PLoS One 2017; 12:e0180503. [PMID: 28683074 PMCID: PMC5500330 DOI: 10.1371/journal.pone.0180503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/18/2017] [Indexed: 01/15/2023] Open
Abstract
A method for Positron Emission Particle Tracking (PEPT) based on optical feature point identification techniques is demonstrated for use in low activity tracking experiments. A population of yeast cells of approximately 125,000 members is activated to roughly 55 Bq/cell by 18F uptake. An in vitro particle tracking experiment is performed with nearly 20 of these cells after decay to 32 Bq/cell. These cells are successfully identified and tracked simultaneously in this experiment. This work extends the applicability of PEPT as a cell tracking method by allowing a number of cells to be tracked together, and demonstrating tracking for very low activity tracers.
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Affiliation(s)
- Seth T. Langford
- Department of Nuclear Engineering, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
| | - Cody S. Wiggins
- Department of Physics and Astronomy, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
- * E-mail:
| | - Roque Santos
- Department of Nuclear Engineering, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
- Departamento de Ciencias Nucleares, Escuela Politécnica Nacional, Quito, Ecuador
| | - Melinda Hauser
- Department of Microbiology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
| | - Jeffrey M. Becker
- Department of Microbiology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
| | - Arthur E. Ruggles
- Department of Nuclear Engineering, University of Tennessee-Knoxville, Knoxville, Tennessee, United States of America
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12
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Gallina ME, Kim TJ, Shelor M, Vasquez J, Mongersun A, Kim M, Tang SKY, Abbyad P, Pratx G. Toward a Droplet-Based Single-Cell Radiometric Assay. Anal Chem 2017; 89:6472-6481. [PMID: 28562033 PMCID: PMC5480233 DOI: 10.1021/acs.analchem.7b00414] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
![]()
Radiotracers are
widely used to track molecular processes, both in vitro and in vivo, with high sensitivity
and specificity. However, most radionuclide detection methods have
spatial resolution inadequate for single-cell analysis. A few existing
methods can extract single-cell information from radioactive decays,
but the stochastic nature of the process precludes high-throughput
measurement (and sorting) of single cells. In this work, we introduce
a new concept for translating radioactive decays occurring stochastically
within radiolabeled single-cells into an integrated, long-lasting
fluorescence signal. Single cells are encapsulated in radiofluorogenic
droplets containing molecular probes sensitive to byproducts of ionizing
radiation (primarily reactive oxygen species, or ROS). Different probes
were examined in bulk solutions, and dihydrorhodamine 123 (DHRh 123)
was selected as the lead candidate due to its sensitivity and reproducibility.
Fluorescence intensity of DHRh 123 in bulk increased at a rate of
54% per Gy of X-ray radiation and 15% per MBq/ml of 2-deoxy-2-[18F]-fluoro-d-glucose ([18F]FDG). Fluorescence
imaging of microfluidic droplets showed the same linear response,
but droplets were less sensitive overall than the bulk ROS sensor
(detection limit of 3 Gy per droplet). Finally, droplets encapsulating
radiolabeled cancer cells allowed, for the first time, the detection
of [18F]FDG radiotracer uptake in single cells through
fluorescence activation. With further improvements, we expect this
technology to enable quantitative measurement and selective sorting
of single cells based on the uptake of radiolabeled small molecules.
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Affiliation(s)
- Maria Elena Gallina
- Division of Medical Physics, Department of Radiation Oncology, Stanford University , 300 Pasteur Drive, Palo Alto, California 94305, United States
| | - Tae Jin Kim
- Division of Medical Physics, Department of Radiation Oncology, Stanford University , 300 Pasteur Drive, Palo Alto, California 94305, United States
| | - Mark Shelor
- University of California-Merced , Department of Bioengineering, 5200 North Lake Road, Merced, California 95343, United States
| | - Jaime Vasquez
- University of California-San Francisco , School of Pharmacy, 600 16th Street, San Francisco, California, 94158, United States
| | - Amy Mongersun
- Department of Chemistry and Biochemistry, Santa Clara University , Daly Science 123500 El Camino Real, Santa Clara, California 95053, United States
| | - Minkyu Kim
- Department of Mechanical Engineering, Stanford University , 418 Panama Mall, Stanford, California 94305, United States
| | - Sindy K Y Tang
- Department of Mechanical Engineering, Stanford University , 418 Panama Mall, Stanford, California 94305, United States
| | - Paul Abbyad
- Department of Chemistry and Biochemistry, Santa Clara University , Daly Science 123500 El Camino Real, Santa Clara, California 95053, United States
| | - Guillem Pratx
- Division of Medical Physics, Department of Radiation Oncology, Stanford University , 300 Pasteur Drive, Palo Alto, California 94305, United States
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Sussman MA. Inject Me Once and Inject Me Twice. Then Inject Me Once Again. Circ Res 2016; 119:580-1. [PMID: 27539968 DOI: 10.1161/circresaha.116.309445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Mark A Sussman
- From the San Diego Heart Research Institute, San Diego State University, CA.
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Gervois P, Wolfs E, Ratajczak J, Dillen Y, Vangansewinkel T, Hilkens P, Bronckaers A, Lambrichts I, Struys T. Stem Cell-Based Therapies for Ischemic Stroke: Preclinical Results and the Potential of Imaging-Assisted Evaluation of Donor Cell Fate and Mechanisms of Brain Regeneration. Med Res Rev 2016; 36:1080-1126. [DOI: 10.1002/med.21400] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 05/27/2016] [Accepted: 06/17/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Pascal Gervois
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Esther Wolfs
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Jessica Ratajczak
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Yörg Dillen
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Tim Vangansewinkel
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Petra Hilkens
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Annelies Bronckaers
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Ivo Lambrichts
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Tom Struys
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
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15
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Ouyang Y, Kim TJ, Pratx G. Evaluation of a BGO-Based PET System for Single-Cell Tracking Performance by Simulation and Phantom Studies. Mol Imaging 2016; 15:15/0/1536012116646489. [PMID: 27175009 PMCID: PMC5293205 DOI: 10.1177/1536012116646489] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/03/2016] [Indexed: 12/27/2022] Open
Abstract
A recent method based on positron emission was reported for tracking moving point sources using the Inveon PET system. However, the effect of scanner background noise was not further explored. Here, we evaluate tracking with the Genisys4, a bismuth germanate-based PET system, which has no significant intrinsic background and may be better suited to tracking lower and/or faster activity sources. Position-dependent sensitivity of the Genisys4 was simulated in Geant4 Application for Tomographic Emission (GATE) using a static 18F point source. Trajectories of helically moving point sources with varying activity and rotation speed were reconstructed from list-mode data as described previously. Simulations showed that the Inveon’s ability to track sources within 2 mm of localization error is limited to objects with a velocity-to-activity ratio < 0.13 mm/decay, compared to < 0.29 mm/decay for the Genisys4. Tracking with the Genisys4 was then validated using a physical phantom of helically moving [18F] fluorodeoxyglucose-in-oil droplets (< 0.24 mm diameter, 139-296 Bq), yielding < 1 mm localization error under the tested conditions, with good agreement between simulated sensitivity and measured activity (Pearson correlation R = .64, P << .05 in a representative example). We have investigated the tracking performance with the Genisys4, and results suggest the feasibility of tracking low activity, point source-like objects with this system.
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Affiliation(s)
- Yu Ouyang
- Radiation Biophysics Laboratory, Department of Radiation Oncology, Stanford University, Palo Alto, CA, USA
| | - Tae Jin Kim
- Radiation Biophysics Laboratory, Department of Radiation Oncology, Stanford University, Palo Alto, CA, USA
| | - Guillem Pratx
- Radiation Biophysics Laboratory, Department of Radiation Oncology, Stanford University, Palo Alto, CA, USA
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Kim MH, Lee KC, An GI, Woo SK, Park NW, Kim BI, Eom KD, Kim KI, Lee TS, Kim CW, Yoo J, Kang JH, Lee YJ. Evaluation of safety and efficacy of adipose-derived stem cells in rat myocardial infarction model using hexadecyl-4-[ 124 I]iodobenzoate for cell tracking. Appl Radiat Isot 2016; 108:116-123. [DOI: 10.1016/j.apradiso.2015.12.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 11/20/2015] [Accepted: 12/14/2015] [Indexed: 01/10/2023]
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In Vivo Tracking of Cell Therapies for Cardiac Diseases with Nuclear Medicine. Stem Cells Int 2016; 2016:3140120. [PMID: 26880951 PMCID: PMC4737458 DOI: 10.1155/2016/3140120] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 10/18/2015] [Accepted: 10/20/2015] [Indexed: 12/31/2022] Open
Abstract
Even though heart diseases are amongst the main causes of mortality and morbidity in the world, existing treatments are limited in restoring cardiac lesions. Cell transplantations, originally developed for the treatment of hematologic ailments, are presently being explored in preclinical and clinical trials for cardiac diseases. Nonetheless, little is known about the possible efficacy and mechanisms for these therapies and they are the center of continuous investigation. In this scenario, noninvasive imaging techniques lead to greater comprehension of cell therapies. Radiopharmaceutical cell labeling, firstly developed to track leukocytes, has been used successfully to evaluate the migration of cell therapies for myocardial diseases. A substantial rise in the amount of reports employing this methodology has taken place in the previous years. We will review the diverse radiopharmaceuticals, imaging modalities, and results of experimental and clinical studies published until now. Also, we report on current limitations and potential advances of radiopharmaceutical labeling for cell therapies in cardiac diseases.
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Kim MH, Lee YJ, Kang JH. Stem Cell Monitoring with a Direct or Indirect Labeling Method. Nucl Med Mol Imaging 2015; 50:275-283. [PMID: 27994682 DOI: 10.1007/s13139-015-0380-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/05/2015] [Accepted: 10/07/2015] [Indexed: 11/25/2022] Open
Abstract
The molecular imaging techniques allow monitoring of the transplanted cells in the same individuals over time, from early localization to the survival, migration, and differentiation. Generally, there are two methods of stem cell labeling: direct and indirect labeling methods. The direct labeling method introduces a labeling agent into the cell, which is stably incorporated or attached to the cells prior to transplantation. Direct labeling of cells with radionuclides is a simple method with relatively fewer adverse events related to genetic responses. However, it can only allow short-term distribution of transplanted cells because of the decreasing imaging signal with radiodecay, according to the physical half-lives, or the signal becomes more diffuse with cell division and dispersion. The indirect labeling method is based on the expression of a reporter gene transduced into the cell before transplantation, which is then visualized upon the injection of an appropriate probe or substrate. In this review, various imaging strategies to monitor the survival and behavior change of transplanted stem cells are covered. Taking these new approaches together, the direct and indirect labeling methods may provide new insights on the roles of in vivo stem cell monitoring, from bench to bedside.
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Affiliation(s)
- Min Hwan Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), 75 Nowon-gil, Gongneung-Dong, Nowon-Gu, Seoul, 139-706 Republic of Korea
| | - Yong Jin Lee
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), 75 Nowon-gil, Gongneung-Dong, Nowon-Gu, Seoul, 139-706 Republic of Korea
| | - Joo Hyun Kang
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), 75 Nowon-gil, Gongneung-Dong, Nowon-Gu, Seoul, 139-706 Republic of Korea
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Kim MH, Woo SK, Kim KI, Lee TS, Kim CW, Kang JH, Kim BI, Lim SM, Lee KC, Lee YJ. Simple Methods for Tracking Stem Cells with (64)Cu-Labeled DOTA-hexadecyl-benzoate. ACS Med Chem Lett 2015; 6:528-30. [PMID: 26005527 DOI: 10.1021/acsmedchemlett.5b00021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/07/2015] [Indexed: 11/28/2022] Open
Abstract
The purpose of this study was to evaluate (64)Cu-labeled hexadecyl-1,4,7,10-tetraazacyclododecane-tetraacetic acid-benzoate ((64)Cu-DOTA-HB) (1) as positron emission tomography (PET) radiotracer for stem cell imaging. Hexadecyl-DOTA-benzoate (DOTA-HB) (2) was efficiently labeled with (64)Cu (>99%), and cell labeling efficiency with adipose-derived stem cells (ADSCs) was over 50%. Labeling with 1 did not compromise cell viability. In the PET imaging, intramuscularly transplanted 1-labeled ADSCs were monitored for 18 h in normal rat heart. These results indicate that 1 can be utilized as a promising radiotracer for monitoring of transplanted stem cells.
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Affiliation(s)
- Min Hwan Kim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
- School
of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Sang-Keun Woo
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Kwang Il Kim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Tae Sup Lee
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Chan Wha Kim
- School
of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Joo Hyun Kang
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Byung Il Kim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Sang Moo Lim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Kyo Chul Lee
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Yong Jin Lee
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
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Bansal A, Pandey MK, Demirhan YE, Nesbitt JJ, Crespo-Diaz RJ, Terzic A, Behfar A, DeGrado TR. Novel (89)Zr cell labeling approach for PET-based cell trafficking studies. EJNMMI Res 2015; 5:19. [PMID: 25918673 PMCID: PMC4401478 DOI: 10.1186/s13550-015-0098-y] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 03/13/2015] [Indexed: 02/07/2023] Open
Abstract
Background With the recent growth of interest in cell-based therapies and radiolabeled cell products, there is a need to develop more robust cell labeling and imaging methods for in vivo tracking of living cells. This study describes evaluation of a novel cell labeling approach with the positron emission tomography (PET) isotope 89Zr (T1/2 = 78.4 h). 89Zr may allow PET imaging measurements for several weeks and take advantage of the high sensitivity of PET imaging. Methods A novel cell labeling agent, 89Zr-desferrioxamine-NCS (89Zr-DBN), was synthesized. Mouse-derived melanoma cells (mMCs), dendritic cells (mDCs), and human mesenchymal stem cells (hMSCs) were covalently labeled with 89Zr-DBN via the reaction between the NCS group on 89Zr-DBN and primary amine groups present on cell surface membrane protein. The stability of the label on the cell was tested by cell efflux studies for 7 days. The effect of labeling on cellular viability was tested by proliferation, trypan blue, and cytotoxicity/apoptosis assays. The stability of label was also studied in in vivo mouse models by serial PET scans and ex vivo biodistribution following intravenous and intramyocardial injection of 89Zr-labeled hMSCs. For comparison, imaging experiments were performed after intravenous injections of 89Zr hydrogen phosphate (89Zr(HPO4)2). Results The labeling agent, 89Zr-DBN, was prepared in 55% ± 5% decay-corrected radiochemical yield measured by silica gel iTLC. The cell labeling efficiency was 30% to 50% after 30 min labeling depending on cell type. Radioactivity concentrations of labeled cells of up to 0.5 MBq/106 cells were achieved without a negative effect on cellular viability. Cell efflux studies showed high stability of the radiolabel out to 7 days. Myocardially delivered 89Zr-labeled hMSCs showed retention in the myocardium, as well as redistribution to the lung, liver, and bone. Intravenously administered 89Zr-labeled hMSCs also distributed primarily to the lung, liver, and bone, whereas intravenous 89Zr(HPO4)2 distributed to the liver and bone with no activity in the lung. Thus, the in vivo stability of the radiolabel on the hMSCs was evidenced. Conclusions We have developed a robust, general, and biostable 89Zr-DBN-based cell labeling strategy with promise for wide applications of PET-based non-invasive in vivo cell trafficking.
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Affiliation(s)
- Aditya Bansal
- Department of Radiology, Mayo Clinic, Rochester, 55905 MN USA
| | - Mukesh K Pandey
- Department of Radiology, Mayo Clinic, Rochester, 55905 MN USA
| | | | - Jonathan J Nesbitt
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, 55905 MN USA
| | | | - Andre Terzic
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, 55905 MN USA
| | - Atta Behfar
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, 55905 MN USA
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PET imaging of a collagen matrix reveals its effective injection and targeted retention in a mouse model of myocardial infarction. Biomaterials 2015; 49:18-26. [PMID: 25725551 DOI: 10.1016/j.biomaterials.2015.01.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/07/2015] [Accepted: 01/20/2015] [Indexed: 02/01/2023]
Abstract
Injectable biomaterials have shown promise for cardiac regeneration therapy. However, little is known regarding their retention and distribution upon application in vivo. Matrix imaging would be useful for evaluating these important properties. Herein, hexadecyl-4-[(18)F]fluorobenzoate ((18)F-HFB) and Qdot labeling was used to evaluate collagen matrix delivery in a mouse model of myocardial infarction (MI). At 1 wk post-MI, mice received myocardial injections of (18)F-HFB- or Qdot-labeled matrix to assess its early retention and distribution (at 10 min and 2h) by positron emission tomography (PET), or fluorescence imaging, respectively. PET imaging showed that the bolus of matrix at 10 min redistributed evenly within the ischemic territory by 2h. Ex vivo biodistribution revealed myocardial matrix retention of ∼ 65%, which correlated with PET results, but may be an underestimate since (18)F-HFB matrix labeling efficiency was ∼ 82%. For covalently linked Qdots, labeling efficiency was ∼ 96%. Ex vivo Qdot quantification showed that ∼ 84% of the injected matrix was retained in the myocardium. Serial non-invasive PET imaging and validation by fluorescence imaging confirmed the effectiveness of the collagen matrix to be retained and redistributed within the infarcted myocardium. This study identifies matrix-targeted imaging as a promising modality for assessing the biodistribution of injectable biomaterials for application in the heart.
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