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Bohrmann L, Poulie CBM, Rodríguez-Rodríguez C, Karagiozov S, Saatchi K, Herth MM, Häfeli UO. Development of a 99mTc-labeled tetrazine for pretargeted SPECT imaging using an alendronic acid-based bone targeting model. PLoS One 2024; 19:e0300466. [PMID: 38626058 PMCID: PMC11020896 DOI: 10.1371/journal.pone.0300466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 02/27/2024] [Indexed: 04/18/2024] Open
Abstract
Pretargeting, which is the separation of target accumulation and the administration of a secondary imaging agent into two sequential steps, offers the potential to improve image contrast and reduce radiation burden for nuclear imaging. In recent years, the tetrazine ligation has emerged as a promising approach to facilitate covalent pretargeted imaging due to its unprecedented kinetics and bioorthogonality. Pretargeted bone imaging with TCO-modified alendronic acid (Aln-TCO) is an attractive model that allows the evaluation of tetrazines in healthy animals without the need for complex disease models or targeting regimens. Recent structure-activity relationship studies of tetrazines evaluated important parameters for the design of potent tetrazine-radiotracers for pretargeted imaging. However, limited information is available for 99mTc-labeled tetrazines. In this study, four tetrazines intended for labeling with fac-[99mTc(OH2)3 (CO)3]+ were synthesized and evaluated using an Aln-TCO mouse model. 3,6-bis(2-pyridyl)-1,2,4,5-Tz without additional linker showed higher pretargeted bone uptake and less background activity compared to the same scaffold with a PEG8 linker or 3-phenyl-1,2,4,5-Tz-based compounds. Additionally, improved bone/blood ratios were observed in pretargeted animals compared to animals receiving directly labeled Aln-TCO. The results of this study implicate 3,6-bis(2-pyridyl)-1,2,4,5-Tz as a promising scaffold for potential 99mTc-labeled tetrazines.
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Affiliation(s)
- Lennart Bohrmann
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken, Copenhagen, Denmark
| | - Christian B. M. Poulie
- Department of Drug Design and Pharmacology, Faculty of Health and Medicinal Sciences, University of Copenhagen, Universitetsparken, Copenhagen, Denmark
| | | | - Stoyan Karagiozov
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Katayoun Saatchi
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Matthias M. Herth
- Department of Drug Design and Pharmacology, Faculty of Health and Medicinal Sciences, University of Copenhagen, Universitetsparken, Copenhagen, Denmark
- Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej, Copenhagen, Denmark
| | - Urs O. Häfeli
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken, Copenhagen, Denmark
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2
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Alešković M, Šekutor M. Overcoming barriers with non-covalent interactions: supramolecular recognition of adamantyl cucurbit[ n]uril assemblies for medical applications. RSC Med Chem 2024; 15:433-471. [PMID: 38389878 PMCID: PMC10880950 DOI: 10.1039/d3md00596h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 11/30/2023] [Indexed: 02/24/2024] Open
Abstract
Adamantane, a staple in medicinal chemistry, recently became a cornerstone of a supramolecular host-guest drug delivery system, ADA/CB[n]. Owing to a good fit between the adamantane cage and the host cavity of the cucurbit[n]uril macrocycle, formed strong inclusion complexes find applications in drug delivery and controlled drug release. Note that the cucurbit[n]uril host is not solely a delivery vehicle of the ADA/CB[n] system but rather influences the bioactivity and bioavailability of drug molecules and can tune drug properties. Namely, as host-guest interactions are capable of changing the intrinsic properties of the guest molecule, inclusion complexes can become more soluble, bioavailable and more resistant to metabolic conditions compared to individual non-complexed molecules. Such synergistic effects have implications for practical bioapplicability of this complex system and provide a new viewpoint to therapy, beyond the traditional single drug molecule approach. By achieving a balance between guest encapsulation and release, the ADA/CB[n] system has also found use beyond just drug delivery, in fields like bioanalytics, sensing assays, bioimaging, etc. Thus, chemosensing in physiological conditions, indicator displacement assays, in vivo diagnostics and hybrid nanostructures are just some recent examples of the ADA/CB[n] applicability, be it for displacements purposes or as cargo vehicles.
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Affiliation(s)
- Marija Alešković
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
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3
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Jallinoja VIJ, Abbriano CH, Bhatt K, Kaur A, Schlyer DJ, Yazaki PJ, Carney BD, Houghton JL. Pretargeting with Cucurbituril-Adamantane Host-Guest Pair in Xenograft Models. J Nucl Med 2023; 64:1203-1209. [PMID: 37024305 PMCID: PMC10394317 DOI: 10.2967/jnumed.122.265008] [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: 10/07/2022] [Revised: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 04/08/2023] Open
Abstract
The goal of reducing the total-body radiation dose of macromolecule-based nuclear medicine with a 2-step pretargeting strategy has been achieved with several pretargeting methodologies in preclinical and clinical settings. However, the lack of modularity, biocompatibility, and in vivo stability in existing pretargeting agents obstructs their respective platforms' wide clinical use. We hypothesized that host-guest chemistry would provide an optimal pretargeting methodology. A cucurbit[7]uril host and an adamantane guest molecule form a high-affinity host-guest complex (association constant, ∼1014 M-1), and in this work, we explored the use of this noncovalent interaction as the basis for antibody-based pretargeted PET. Along with the straightforward modularity of these agents, cucurbit[7]uril and adamantane are recognized to have high in vivo stability and suitability for human use, which is why we proposed this methodology as the ideal approach for pretargeted nuclear medicine. Methods: Three 64Cu-labeled adamantane guest radioligands were developed, and their in vitro stability, lipophilicity, and in vivo blood half-lives were compared. The adamantane radioligands were analyzed for pretargeting using a cucurbit[7]uril-modified carcinoembryonic antigen-targeting full-length antibody, hT84.66-M5A, as the macromolecule pretargeting agent with 2 different dosing schedules. These molecules were evaluated for pretargeting in human pancreatic cancer BxPC3 and MIAPaCa-2 mouse xenografts using PET and in vivo biodistribution studies. The dosimetry of the cucurbit[7]uril-adamantane (CB7-Adma) pretargeting approach in men was calculated and compared with that of the directly 89Zr-labeled hT84.66-M5A. Results: The adamantane radioligands possessed high in vitro stability up to 24 h (>90%). Pretargeted PET with CB7-Adma methodology resulted in specific tumor uptake (P < 0.05) with low background signal. The in vivo formed CB7-Adma complex was demonstrated to be stable, with high tumor uptake up to 24 h after radioligand injection (12.0 ± 0.9 percentage injected dose/g). The total-body radiation dose of the pretargeting strategy was only 3.3% that of the directly 89Zr-labeled hT84.66-M5A. Conclusion: The CB7-Adma strategy is highly suitable for pretargeted PET. The exceptional stability of the pretargeting agents and the specific and high tumor uptake of the pretargeted adamantane radioligands provide great potential for the platform.
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Affiliation(s)
- Vilma I J Jallinoja
- Department of Radiology, Stony Brook University, Stony Brook, New York
- Chemical and Physical Biology Graduate Program, Vanderbilt University, Nashville, Tennessee
| | | | - Kavita Bhatt
- Department of Radiology, Stony Brook University, Stony Brook, New York
| | - Amritjyot Kaur
- Department of Radiology, Stony Brook University, Stony Brook, New York
| | - David J Schlyer
- Department of Radiology, Stony Brook University, Stony Brook, New York
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York; and
| | - Paul J Yazaki
- Department of Immunology and Theranostics, Beckman Research Institute, City of Hope, Duarte, California
| | - Brandon D Carney
- Department of Radiology, Stony Brook University, Stony Brook, New York
| | - Jacob L Houghton
- Department of Radiology, Stony Brook University, Stony Brook, New York;
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4
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Gates BD, Vyletel JB, Zou L, Webber MJ. Multivalent Cucurbituril Dendrons for Cell Membrane Engineering with Supramolecular Receptors. Bioconjug Chem 2022; 33:2262-2268. [PMID: 35802933 PMCID: PMC11144120 DOI: 10.1021/acs.bioconjchem.2c00242] [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] [Indexed: 12/29/2022]
Abstract
The affinity possible from certain supramolecular motifs rivals that for some of the best-recognized interactions in biology. Cucurbit[7]uril (CB[7]) macrocycles, for example, are capable of achieving affinities in their binding to certain guests that rival that of biotin-avidin. Supramolecular host-guest recognition between CB[7] and certain guests has been demonstrated to spatially localize guest-linked agents to desired sites in vivo, offering opportunities to better exploit this affinity axis for applications in biomedicine. Herein, architectures of CB[7] are prepared from a polyamidoamine (PAMAM) dendrimer scaffold, installing a PEG-linked cholesterol anchor on the opposite end of the dendron to facilitate cell membrane integration. Cells are then modified with this dendritic CB[7] construct in vitro, demonstrating the ability to deliver a model guest-linked agent to the cell membrane. This approach to realize synthetic supramolecular "membrane receptors" may be leveraged in the future for in situ imaging or modulation of cell-based therapies or to facilitate a synthetic supramolecular recognition axis on the cell membrane.
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Affiliation(s)
- Brant D. Gates
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Jackson B. Vyletel
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Lei Zou
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Matthew J. Webber
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
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5
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Cheal SM, Chung SK, Vaughn BA, Cheung NKV, Larson SM. Pretargeting: A Path Forward for Radioimmunotherapy. J Nucl Med 2022; 63:1302-1315. [PMID: 36215514 DOI: 10.2967/jnumed.121.262186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/07/2022] [Indexed: 12/19/2022] Open
Abstract
Pretargeted radioimmunodiagnosis and radioimmunotherapy aim to efficiently combine antitumor antibodies and medicinal radioisotopes for high-contrast imaging and high-therapeutic-index (TI) tumor targeting, respectively. As opposed to conventional radioimmunoconjugates, pretargeted approaches separate the tumor-targeting step from the payload step, thereby amplifying tumor uptake while reducing normal-tissue exposure. Alongside contrast and TI, critical parameters include antibody immunogenicity and specificity, availability of radioisotopes, and ease of use in the clinic. Each of the steps can be optimized separately; as modular systems, they can find broad applications irrespective of tumor target, tumor type, or radioisotopes. Although this versatility presents enormous opportunity, pretargeting is complex and presents unique challenges for clinical translation and optimal use in patients. The purpose of this article is to provide a brief historical perspective on the origins and development of pretargeting strategies in nuclear medicine, emphasizing 2 protein delivery systems that have been extensively evaluated (i.e., biotin-streptavidin and hapten-bispecific monoclonal antibodies), as well as radiohaptens and radioisotopes. We also highlight recent innovations, including pretargeting with bioorthogonal chemistry and novel protein vectors (such as self-assembling and disassembling proteins and Affibody molecules). We caution the reader that this is by no means a comprehensive review of the past 3 decades of pretargeted radioimmunodiagnosis and pretargeted radioimmunotherapy. But we do aim to highlight major developmental milestones and to identify benchmarks for success with regard to TI and toxicity in preclinical models and clinically. We believe this approach will lead to the identification of key obstacles to clinical success, revive interest in the utility of radiotheranostics applications, and guide development of the next generation of pretargeted theranostics.
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Affiliation(s)
- Sarah M Cheal
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York;
| | - Sebastian K Chung
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Brett A Vaughn
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nai-Kong V Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York; and
| | - Steven M Larson
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
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6
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Ambrose B, Kannan A, Kathiresan M. Evaluation of negolyte properties of supramolecular binary complexes based on viologen-cucurbit[7]urils. NEW J CHEM 2022. [DOI: 10.1039/d1nj05816a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Viologen-based redox materials have become popular as electrolytes for aqueous organic redox flow batteries (AORFBs) in recent years because of their reversible nature.
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Affiliation(s)
- Bebin Ambrose
- Electro organic and Materials Electrochemistry Division, CSIR-CECRI, Karaikudi-630003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Arthy Kannan
- Electro organic and Materials Electrochemistry Division, CSIR-CECRI, Karaikudi-630003, Tamil Nadu, India
| | - Murugavel Kathiresan
- Electro organic and Materials Electrochemistry Division, CSIR-CECRI, Karaikudi-630003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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7
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Abstract
The fields of precision imaging and drug delivery have revealed a number of tools to improve target specificity and increase efficacy in diagnosing and treating disease. Biological molecules, such as antibodies, continue to be the primary means of assuring active targeting of various payloads. However, molecular-scale recognition motifs have emerged in recent decades to achieve specificity through the design of interacting chemical motifs. In this regard, an assortment of bioorthogonal covalent conjugations offer possibilities for in situ complexation under physiological conditions. Herein, a related concept is discussed that leverages interactions from noncovalent or supramolecular motifs to facilitate in situ recognition and complex formation in the body. Classic supramolecular motifs based on host-guest complexation offer one such means of facilitating recognition. In addition, synthetic bioinspired motifs based on oligonucleotide hybridization and coiled-coil peptide bundles afford other routes to form complexes in situ. The architectures to include recognition of these various motifs for targeting enable both monovalent and multivalent presentation, seeking high affinity or engineered avidity to facilitate conjugation even under dilute conditions of the body. Accordingly, supramolecular "click chemistry" offers a complementary tool in the growing arsenal targeting improved healthcare efficacy.
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Affiliation(s)
| | | | - Matthew J. Webber
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
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8
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Jallinoja VIJ, Carney BD, Zhu M, Bhatt K, Yazaki PJ, Houghton JL. Cucurbituril-Ferrocene: Host-Guest Based Pretargeted Positron Emission Tomography in a Xenograft Model. Bioconjug Chem 2021; 32:1554-1558. [PMID: 34156824 PMCID: PMC9153067 DOI: 10.1021/acs.bioconjchem.1c00280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Pretargeted positron emission tomography is a macromolecule-driven nuclear medicine technique that involves targeting a preadministered antigen target-bound macromolecule with a radioligand in vivo, aiming to minimize the overall radiation dose. This study investigates the use of antibody based host-guest chemistry methodology for pretargeted positron emission tomography. We hypothesize that the novel pretargeting approach reported here overcomes the challenges the current pretargeting platforms have with the in vivo stability and modularity of the pretargeting components. A cucurbit[7]uril host molecule modified, anti-carcinoembryonic antigen antibody (M5A; CB7-M5A) and a 68Ga-radiolabeled ferrocene guest radioligand ([68Ga]Ga-NOTA-PEG3-NMe2-Fc) were studied as potential host-guest chemistry pretargeting agents for positron emission tomography in BxPC3 xenografted nude mice. The viability of the platform was studied via in vivo biodistribution and positron emission tomography. Tumor uptake of [68Ga]Ga-NOTA-PEG3-NMe2-Fc was significantly higher in mice which received CB7-M5A prior to the radioligand injection (pretargeted) (3.3 ± 0.7%ID/g) compared to mice which only received the radioligand (nonpretargeted) (0.2 ± 0.1%ID/g).
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Affiliation(s)
- Vilma IJ Jallinoja
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, USA
- Department of Radiology, Stony Brook University, Stony Brook, New York, 11774, USA
| | - Brandon D Carney
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, USA
- Department of Radiology, Stony Brook University, Stony Brook, New York, 11774, USA
| | - Meiying Zhu
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, USA
| | - Kavita Bhatt
- Department of Radiology, Stony Brook University, Stony Brook, New York, 11774, USA
| | - Paul J Yazaki
- Beckman Institute, City of Hope, Duarte, California 91010, USA
| | - Jacob L Houghton
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, USA
- Department of Radiology, Stony Brook University, Stony Brook, New York, 11774, USA
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9
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Li F, Zeng Z, Hamilton D, Zu Y, Li Z. EpCAM-Targeting Aptamer Radiotracer for Tumor-Specific PET Imaging. Bioconjug Chem 2021; 32:1139-1145. [PMID: 34014641 DOI: 10.1021/acs.bioconjchem.1c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Noninvasive in vivo imaging to measure the expression of EpCAM, a biomarker overexpressed in the majority of carcinoma tumors and metastatic lesions, is highly desirable for accurate tumor staging and therapy evaluation. Here, we report the use of an aptamer radiotracer to enable tumor-specific EpCAM-targeting PET imaging. Oligonucleotide aptamers are small molecular ligands that specifically bind with high affinity to their target molecules. For specific tumor imaging, an aptamer radiotracer was formulated by chelating a 64Cu isotope and DOTA-PEGylated aptamer sequence to target EpCAM. In vitro cell uptake assays demonstrated that the aptamer radiotracer specifically bound EpCAM-expressing breast cancer cells but did not react with off-target tumor cells. For in vivo tumor imaging, aptamer radiotracer was systemically administered into xenograft mice. MicroPET/CT scans revealed that the aptamer radiotracer rapidly highlighted xenograft tumors derived from MDA-MB-231 breast cancer cells (EpCAM positive) as early as 2 h postadministration with a gradually increasing tumor uptake signal that peaked at 24 h but not in lymphoma 937 tumors (EpCAM negative). In contrast, nonspecific background signals in the liver and kidneys were rapidly decreased postadministration. This proof-of-concept study demonstrates the utility of aptamer radiotracers for tumor-specific PET imaging.
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10
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Welling MM, Duszenko N, van Willigen DM, Smits WK, Buckle T, Roestenberg M, van Leeuwen FWB. Cyclodextrin/Adamantane-Mediated Targeting of Inoculated Bacteria in Mice. Bioconjug Chem 2021; 32:607-614. [PMID: 33621052 PMCID: PMC8028042 DOI: 10.1021/acs.bioconjchem.1c00061] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Cyclodextrin (CD)-based
host–guest interactions with adamantane
(Ad) have demonstrated use for functionalizing living cells in vitro. The next step in this supramolecular functionalization
approach is to explore the concept to deliver chemical cargo to living
cells in vivo, e.g., inoculated bacteria, in order
to study their dissemination. We validated this concept in two rodent Staphylococcus aureus models. Bacteria (1 × 108 viable S. aureus) were inoculated by (1)
intramuscular injection or (2) intrasplenic injection followed by
dissemination throughout the liver. The bacteria were prefunctionalized
with 99mTc-UBI29–41-Ad2 (primary
vector), which allowed us to both determine the bacterial load and
create an in vivo target for the secondary host-vector
(24 h post-inoculation). The secondary vector, i.e., chemical cargo
delivery system, made use of a 111In-Cy50.5CD9PIBMA39 polymer that was administered intravenously.
Bacteria-specific cargo delivery as a result of vector complexation
was evaluated by dual-isotope SPECT imaging and biodistribution studies
(111In), and by fluorescence (Cy5); these evaluations were
performed 4 h post-injection of the secondary vector. Mice inoculated
with nonfunctionalized S. aureus and mice without
an infection served as controls. Dual-isotope SPECT imaging demonstrated
that 111In-Cy50.5CD9PIBMA39 colocalized with 99mTc-UBI29–41-Ad2-labeled bacteria in both muscle and liver. In inoculated
muscle, a 2-fold higher uptake level (3.2 ± 1.0%ID/g) was noted
compared to inoculation with nonfunctionalized bacteria (1.9 ±
0.4%ID/g), and a 16-fold higher uptake level compared to noninfected
muscle (0.2 ± 0.1%ID/g). The hepatic accumulation of the host-vector
was nearly 10-fold higher (27.1 ± 11.1%ID/g) compared to the
noninfected control (2.7 ± 0.3%ID/g; p <
0.05). Fluorescence imaging of the secondary vector corroborated SPECT-imaging
and biodistribution findings. We have demonstrated that supramolecular
host–guest complexation can be harnessed to achieve an in vivo cargo delivery strategy, using two different bacterial
models in soft tissue and liver. This proof-of-principle study paves
a path toward developing innovative drug delivery concepts via cell
functionalization techniques.
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Affiliation(s)
- Mick M Welling
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Nikolas Duszenko
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2300 RC Leiden, Netherlands.,Department of Parasitology and Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Danny M van Willigen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Wiep Klaas Smits
- Department of Medical Microbiology, Section Experimental Bacteriology, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Tessa Buckle
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Meta Roestenberg
- Department of Parasitology and Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Fijs W B van Leeuwen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2300 RC Leiden, Netherlands
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11
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Cheal SM, McDevitt MR, Santich BH, Patel M, Yang G, Fung EK, Veach DR, Bell M, Ahad A, Vargas DB, Punzalan B, Pillarsetty NVK, Xu H, Guo HF, Monette S, Michel AO, Piersigilli A, Scheinberg DA, Ouerfelli O, Cheung NKV, Larson SM. Alpha radioimmunotherapy using 225Ac-proteus-DOTA for solid tumors - safety at curative doses. Theranostics 2020; 10:11359-11375. [PMID: 33052220 PMCID: PMC7546012 DOI: 10.7150/thno.48810] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/29/2020] [Indexed: 02/07/2023] Open
Abstract
This is the initial report of an α-based pre-targeted radioimmunotherapy (PRIT) using 225Ac and its theranostic pair, 111In. We call our novel tumor-targeting DOTA-hapten PRIT system "proteus-DOTA" or "Pr." Herein we report the first results of radiochemistry development, radiopharmacology, and stoichiometry of tumor antigen binding, including the role of specific activity, anti-tumor efficacy, and normal tissue toxicity with the Pr-PRIT approach (as α-DOTA-PRIT). A series of α-DOTA-PRIT therapy studies were performed in three solid human cancer xenograft models of colorectal cancer (GPA33), breast cancer (HER2), and neuroblastoma (GD2), including evaluation of chronic toxicity at ~20 weeks of select survivors. Methods: Preliminary biodistribution experiments in SW1222 tumor-bearing mice revealed that 225Ac could not be efficiently pretargeted with current DOTA-Bn hapten utilized for 177Lu or 90Y, leading to poor tumor uptake in vivo. Therefore, we synthesized Pr consisting of an empty DOTA-chelate for 225Ac, tethered via a short polyethylene glycol linker to a lutetium-complexed DOTA for picomolar anti-DOTA chelate single-chain variable fragment (scFv) binding. Pr was radiolabeled with 225Ac and its imaging surrogate, 111In. In vitro studies verified anti-DOTA scFv recognition of [225Ac]Pr, and in vivo biodistribution and clearance studies were performed to evaluate hapten suitability and in vivo targeting efficiency. Results: Intravenously (i.v.) administered 225Ac- or 111In-radiolabeled Pr in mice showed rapid renal clearance and minimal normal tissue retention. In vivo pretargeting studies show high tumor accumulation of Pr (16.71 ± 5.11 %IA/g or 13.19 ± 3.88 %IA/g at 24 h p.i. for [225Ac]Pr and [111In]Pr, respectively) and relatively low uptake in normal tissues (all average ≤ 1.4 %IA/g at 24 h p.i.). Maximum tolerated dose (MTD) was not reached for either [225Ac]Pr alone or pretargeted [225Ac]Pr at administered activities up to 296 kBq/mouse. Single-cycle treatment consisting of α-DOTA-PRIT with either huA33-C825 bispecific anti-tumor/anti-DOTA-hapten antibody (BsAb), anti-HER2-C825 BsAb, or hu3F8-C825 BsAb for targeting GPA33, HER2, or GD2, respectively, was highly effective. In the GPA33 model, no complete responses (CRs) were observed but prolonged overall survival of treated animals was 42 d for α-DOTA-PRIT vs. 25 d for [225Ac]Pr only (P < 0.0001); for GD2, CRs (7/7, 100%) and histologic cures (4/7, 57%); and for HER2, CRs (7/19, 37%) and histologic cures (10/19, 56%) with no acute or chronic toxicity. Conclusions: [225Ac]Pr and its imaging biomarker [111In]Pr demonstrate optimal radiopharmacologic behavior for theranostic applications of α-DOTA-PRIT. For this initial evaluation of efficacy and toxicity, single-cycle treatment regimens were performed in all three systems. Histologic toxicity was not observed, so MTD was not observed. Prolonged overall survival, CRs, and histologic cures were observed in treated animals. In comparison to RIT with anti-tumor IgG antibodies, [225Ac]Pr has a much improved safety profile. Ultimately, these data will be used to guide clinical development of toxicity and efficacy studies of [225Ac]Pr, with the goal of delivering massive lethal doses of radiation to achieve a high probability of cure without toxicity.
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12
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Rondon A, Degoul F. Antibody Pretargeting Based on Bioorthogonal Click Chemistry for Cancer Imaging and Targeted Radionuclide Therapy. Bioconjug Chem 2020; 31:159-173. [PMID: 31855602 DOI: 10.1021/acs.bioconjchem.9b00761] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bioorthogonal click chemistry-employing antibody-conjugated trans-cyclooctenes (TCO) and tetrazine (Tz)-based radioligands able to covalently bind in vivo-appeared recently as a potential alternative to circumvent the hematotoxicity induced by radioimmunotherapy of solid tumors. This Review focuses on the recent advances concerning TCO/Tz pretargeting in both cancer imaging and targeted-radionuclide therapy for prospective clinical transfer. We exhaustively identified 25 PubMed publications reporting preclinical imaging and 5 therapy studies with full mAbs as targeting vectors, since its first application in 2010. The fast, safe, modulable, and specific TCO/Tz pretargeting showed high potential as a theranostic tool to get more personalized and precise cancer care. The recent optimizations reported here highlighted a possible first clinical evaluation of IEDDA pretargeting in the coming years.
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Affiliation(s)
- Aurélie Rondon
- Université Clermont Auvergne , Imagerie Moléculaire et Stratégies Théranostiques , BP 184, F-63005 Clermont-Ferrand , France.,Inserm, U 1240 , F-63000 Clermont-Ferrand , France.,Centre Jean Perrin , F-63011 Clermont-Ferrand , France
| | - Françoise Degoul
- Université Clermont Auvergne , Imagerie Moléculaire et Stratégies Théranostiques , BP 184, F-63005 Clermont-Ferrand , France.,Inserm, U 1240 , F-63000 Clermont-Ferrand , France.,Centre Jean Perrin , F-63011 Clermont-Ferrand , France
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Li M, Kim S, Lee A, Shrinidhi A, Ko YH, Lim HG, Kim HH, Bae KB, Park KM, Kim K. Bio-orthogonal Supramolecular Latching inside Live Animals and Its Application for in Vivo Cancer Imaging. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43920-43927. [PMID: 31686496 DOI: 10.1021/acsami.9b16283] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Here, we demonstrate a supramolecular latching tool for bio-orthogonal noncovalent anchoring of small synthetic molecules in live animal models using a fully synthetic high-affinity binding pair between cucurbit[7]uril (CB[7]) and adamantylammonium (AdA). This supramolecular latching system is small (∼1 kDa), ensuring efficient uptake into cells, tissues, and whole organisms. It is also chemically robust and resistant to enzymatic degradation and analogous to well-characterized biological systems in terms of noncovalent binding. Occurrence of fluorescence resonance energy transfer (FRET) between cyanine 3-CB[7] (Cy3-CB[7]) and boron-dipyrromethene 630/650X-AdA (BDP630/650-AdA) inside a live worm (Caenorhabditis elegans) indicates efficient in situ high-affinity association between AdA and CB[7] inside live animals. In addition, selective visualization of a cancer site of a live mouse upon supramolecular latching of cyanine 5-AdA (Cy5-AdA) on prelocalized CB[7]-conjugating antibody on the cancer site demonstrates the potential of this synthetic system for in vivo cancer imaging. These findings provide a fresh insight into the development of new chemical biology tools and medical therapeutic systems.
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Affiliation(s)
- Meng Li
- Center for Self-Assembly and Complexity (CSC) , Institute for Basic Science (IBS) , Pohang 37673 , Gyeongbuk , Republic of Korea
| | | | | | - Annadka Shrinidhi
- Center for Self-Assembly and Complexity (CSC) , Institute for Basic Science (IBS) , Pohang 37673 , Gyeongbuk , Republic of Korea
| | - Young Ho Ko
- Center for Self-Assembly and Complexity (CSC) , Institute for Basic Science (IBS) , Pohang 37673 , Gyeongbuk , Republic of Korea
| | | | | | - Ki Beom Bae
- Advanced Bio Convergence Center , Pohang Technopark Foundation , Pohang 37668 , Gyeongbuk , Republic of Korea
| | - Kyeng Min Park
- Center for Self-Assembly and Complexity (CSC) , Institute for Basic Science (IBS) , Pohang 37673 , Gyeongbuk , Republic of Korea
| | - Kimoon Kim
- Center for Self-Assembly and Complexity (CSC) , Institute for Basic Science (IBS) , Pohang 37673 , Gyeongbuk , Republic of Korea
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Abstract
Molecular conjugation refers to methods used in biomedicine, advanced materials and nanotechnology to link two partners - from small molecules to large and sometimes functionally complex biopolymers. The methods ideally have a broad structural scope, proceed under very mild conditions (including in H2O), occur at a rapid rate and in quantitative yield with no by-products, enable bioorthogonal reactivity and have zero toxicity. Over the past two decades, the field of click chemistry has emerged to afford us new and efficient methods of molecular conjugation. These methods are based on chemical reactions that produce permanently linked conjugates, and we refer to this field here as covalent click chemistry. Alternatively, if molecular conjugation is undertaken using a pair of complementary molecular recognition partners that associate strongly and selectively to form a thermodynamically stable non-covalent complex, then we refer to this strategy as non-covalent click chemistry. This Perspective is concerned with this latter approach and highlights two distinct applications of non-covalent click chemistry in molecular conjugation: the pre-assembly of molecular conjugates or surface-coated nanoparticles and the in situ capture of tagged biomolecular targets for imaging or analysis.
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Affiliation(s)
- Cynthia L Schreiber
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Bradley D Smith
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
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