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Oroujeni M, Bezverkhniaia EA, Xu T, Liu Y, Plotnikov EV, Klint S, Ryer E, Karlberg I, Orlova A, Frejd FY, Tolmachev V. Evaluation of affinity matured Affibody molecules for imaging of the immune checkpoint protein B7-H3. Nucl Med Biol 2023; 124-125:108384. [PMID: 37699299 DOI: 10.1016/j.nucmedbio.2023.108384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/14/2023]
Abstract
B7-H3 (CD276), an immune checkpoint protein, is a promising molecular target for immune therapy of malignant tumours. Sufficient B7-H3 expression level is a precondition for successful therapy. Radionuclide molecular imaging is a powerful technique for visualization of expression levels of molecular targets in vivo. Use of small radiolabelled targeting proteins would enable high-contrast radionuclide imaging of molecular targets if adequate binding affinity and specificity of an imaging probe could be provided. Affibody molecules, small engineered affinity proteins based on a non-immunoglobulin scaffold, have demonstrated an appreciable potential in radionuclide imaging. Proof-of principle of radionuclide visualization of expression levels of B7-H3 in vivo was demonstrated using the [99mTc]Tc-AC12-GGGC Affibody molecule. We performed an affinity maturation of AC12, enabling selection of clones with higher affinity. Three most promising clones were expressed with a -GGGC (triglycine-cysteine) chelating sequence at the C-terminus and labelled with technetium-99m (99mTc). 99mTc-labelled conjugates bound to B7-H3-expressing cells specifically in vitro and in vivo. Biodistribution in mice bearing B7-H3-expressing SKOV-3 xenografts demonstrated improved imaging properties of the new conjugates compared with the parental variant [99mTc]Tc-AC12-GGGC. [99mTc]Tc-SYNT-179 provided the strongest improvement of tumour-to-organ ratios. Thus, affinity maturation of B7-H3 Affibody molecules could improve biodistribution and targeting properties for imaging of B7-H3-expressing tumours.
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Affiliation(s)
- Maryam Oroujeni
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden; Affibody AB, 171 65 Solna, Sweden.
| | - Ekaterina A Bezverkhniaia
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia; Scientific and Research Laboratory of Chemical and Pharmaceutical Research, Siberian State Medical University, Tomsk 634050, Russia; Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden.
| | - Tianqi Xu
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden.
| | - Yongsheng Liu
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden
| | - Evgenii V Plotnikov
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia
| | | | - Eva Ryer
- Affibody AB, 171 65 Solna, Sweden.
| | | | - Anna Orlova
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia; Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden.
| | - Fredrik Y Frejd
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden; Affibody AB, 171 65 Solna, Sweden.
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden; Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia.
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Nazari M, Emamzadeh R, Jahanpanah M, Yazdani E, Radmanesh R. A recombinant affitoxin derived from a HER3 affibody and diphteria-toxin has potent and selective antitumor activity. Int J Biol Macromol 2022; 219:1122-1134. [PMID: 36041577 DOI: 10.1016/j.ijbiomac.2022.08.150] [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: 06/12/2022] [Revised: 08/08/2022] [Accepted: 08/22/2022] [Indexed: 11/25/2022]
Abstract
High expression of receptor tyrosine-protein kinase erbB-3 (HER3) has been found in several malignancies such as breast cancer. In this study, we designed, produced and evaluated a new affitoxin consisting of a truncated form of diphtheria toxin and a HER3-binding affibody domains. The new affitoxin was expressed in Escherichia coli and purified by affinity chromatography. We evaluated the suitability of affitoxin to kill HER3 positive breast cancer cells with MTT and apoptosis assays. The protein synthesis inhibition was also evaluated. The IC50 value in HER3 negative cells is about 10 times more than HER3 positive cells in new design of affitoxin. The specificity of affitoxin for binding to HER3 positive cells was also investigated with binding assay with flow cytometry. The results show that, the new affitoxin is an anti-cancer molecule with specific binding to HER3 positive cells and may open a new window for the treatment of HER3-positive cancers.
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Affiliation(s)
- Mahboobeh Nazari
- Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran; Endocrine Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences, Tehran, Iran.
| | - Rahman Emamzadeh
- Department of Cell and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Maryam Jahanpanah
- Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Elnaz Yazdani
- Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Ramin Radmanesh
- Department of Pharmacoeconomics and Pharmaceutical Management, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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Evaluation of an Affibody-Based Binder for Imaging of Immune Check-Point Molecule B7-H3. Pharmaceutics 2022; 14:pharmaceutics14091780. [PMID: 36145529 PMCID: PMC9506244 DOI: 10.3390/pharmaceutics14091780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/15/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Radionuclide molecular imaging could provide an accurate assessment of the expression of molecular targets in disseminated cancers enabling stratification of patients for specific therapies. B7-H3 (CD276) is a transmembrane protein belonging to the B7 superfamily. This protein is overexpressed in different types of human malignancies and such upregulation is generally associated with a poor clinical prognosis. In this study, targeting properties of an Affibody-based probe, AC12, containing a -GGGC amino acid sequence as a chelator (designated as AC12-GGGC) labelled with technetium-99m (99mTc) were evaluated for imaging of B7-H3-expressing tumours. AC12-GGGC was efficiently labelled with 99mTc. [99mTc]Tc-AC12-GGGC bound specifically to B7-H3 expressing cells in vitro with affinities in nanomolar range. In mice bearing B7-H3-expressing xenografts, [99mTc]Tc-AC12-GGGC showed tumour uptake of 2.1 ± 0.5 %ID/g at 2 h after injection. Its clearance from blood, normal organs and tissues was very rapid. This new targeting agent, [99mTc]Tc-AC12-GGGC, provided high tumour-to-blood ratio already at 2 h (8.2 ± 1.9), which increased to 11.0 ± 0.5 at 4 h after injection. Significantly (p < 0.05) higher tumour-to-liver and higher tumour-to-bone ratios at 2 h in comparison with 4 h after injection were observed. Thus, [99mTc]Tc-AC12-GGGC could be a promising candidate for further development.
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Liu Y, Yu S, Xu T, Bodenko V, Orlova A, Oroujeni M, Rinne SS, Tolmachev V, Vorobyeva A, Gräslund T. Preclinical Evaluation of a New Format of 68Ga- and 111In-Labeled Affibody Molecule Z IGF-1R:4551 for the Visualization of IGF-1R Expression in Malignant Tumors Using PET and SPECT. Pharmaceutics 2022; 14:pharmaceutics14071475. [PMID: 35890370 PMCID: PMC9320461 DOI: 10.3390/pharmaceutics14071475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/11/2022] [Accepted: 07/13/2022] [Indexed: 02/04/2023] Open
Abstract
The Insulin-like growth factor-1 receptor (IGF-1R) is a molecular target for several monoclonal antibodies undergoing clinical evaluation as anticancer therapeutics. The non-invasive detection of IGF-1R expression in tumors might enable stratification of patients for specific treatment and improve the outcome of both clinical trials and routine treatment. The affibody molecule ZIGF-1R:4551 binds specifically to IGF-1R with subnanomolar affinity. The goal of this study was to evaluate the 68Ga and 111In-labeled affibody construct NODAGA-(HE)3-ZIGF-1R:4551 for the imaging of IGF-1R expression, using PET and SPECT. The labeling was efficient and provided stable coupling of both radionuclides. The two imaging probes, [68Ga]Ga-NODAGA-(HE)3-ZIGF-1R:4551 and [111In]In-NODAGA-(HE)3-ZIGF-1R:4551, demonstrated specific binding to IGF-1R-expressing human cancer cell lines in vitro and to IGF-1R-expressing xenografts in mice. Preclinical PET and SPECT/CT imaging demonstrated visualization of IGF-1R-expressing xenografts already one hour after injection. The tumor-to-blood ratios at 3 h after injection were 7.8 ± 0.2 and 8.0 ± 0.6 for [68Ga]Ga-NODAGA-(HE)3-ZIGF-1R:4551 and [111In]In-NODAGA-(HE)3-ZIGF-1R:4551, respectively. In conclusion, a molecular design of the ZIGF-1R:4551 affibody molecule, including placement of a (HE)3-tag on the N-terminus and site-specific coupling of a NODAGA chelator on the C-terminus, provides a tracer with improved imaging properties for visualization of IGF-1R in malignant tumors, using PET and SPECT.
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Affiliation(s)
- Yongsheng Liu
- Department of Immunology, Genetics and Pathology, Uppsala University, 75237 Uppsala, Sweden; (Y.L.); (T.X.); (M.O.); (A.V.)
| | - Shengze Yu
- Department of Protein Science, KTH Royal Institute of Technology, 10044 Stockholm, Sweden;
| | - Tianqi Xu
- Department of Immunology, Genetics and Pathology, Uppsala University, 75237 Uppsala, Sweden; (Y.L.); (T.X.); (M.O.); (A.V.)
| | - Vitalina Bodenko
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia; (V.B.); (A.O.)
| | - Anna Orlova
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia; (V.B.); (A.O.)
- Department of Medicinal Chemistry, Uppsala University, 75123 Uppsala, Sweden;
| | - Maryam Oroujeni
- Department of Immunology, Genetics and Pathology, Uppsala University, 75237 Uppsala, Sweden; (Y.L.); (T.X.); (M.O.); (A.V.)
- Affibody AB, 17165 Solna, Sweden
| | - Sara S. Rinne
- Department of Medicinal Chemistry, Uppsala University, 75123 Uppsala, Sweden;
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, 75237 Uppsala, Sweden; (Y.L.); (T.X.); (M.O.); (A.V.)
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia; (V.B.); (A.O.)
- Correspondence: (V.T.); (T.G.); Tel.: +46-704-250782 (V.T.); +46-8790-9627 (T.G.)
| | - Anzhelika Vorobyeva
- Department of Immunology, Genetics and Pathology, Uppsala University, 75237 Uppsala, Sweden; (Y.L.); (T.X.); (M.O.); (A.V.)
| | - Torbjörn Gräslund
- Department of Protein Science, KTH Royal Institute of Technology, 10044 Stockholm, Sweden;
- Correspondence: (V.T.); (T.G.); Tel.: +46-704-250782 (V.T.); +46-8790-9627 (T.G.)
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Liu H, Jia D, Yuan F, Wang F, Wei D, Tang X, Tian B, Zheng S, Sun R, Shi J, Fan Q. Her3-specific affibody mediated tumor targeting delivery of ICG enhanced the photothermal therapy against Her3-positive tumors. Int J Pharm 2022; 617:121609. [PMID: 35217073 DOI: 10.1016/j.ijpharm.2022.121609] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/30/2022] [Accepted: 02/19/2022] [Indexed: 02/08/2023]
Abstract
Photothermal therapy (PTT), mediated by tumor-targeted drug delivery of indocyanine green (ICG), is a promising strategy for cancer therapy. Human epidermal growth factor receptor 3 (Her3) is highly expressed in several solid tumors and is an ideal target for tumor diagnosis and therapy. This study prepared a Her3-specific dimeric affibody (ZHer3) using an Escherichia coli expression system. The affibody could bind explicitly to Her3-positive MCF7 and LS174T cells, rather than to Her3-negative SKOV-3 cells in vitro. ICG was coupled with the ZHer3 affibody (ICG-ZHer3) through an N-hydroxysuccinimide (NHS) ester reactive group for tumor-targeted delivery. As expected, Her3-positive cells were selectively and efficiently killed by ICG-ZHer3-mediated PTT in vitro. In vivo, ICG-ZHer3 preferentially accumulated in Her3-positive LS174T tumor grafts because of the tumor-targeting ability of the ZHer3 affibody. As a result of the local generation of cytotoxic reactive oxygen species and hyperthermia, the growth rates of LS174T tumor grafts were significantly inhibited by ICG-ZHer3-mediated PTT, and ICG-ZHer3 showed good safety performance during short-term treatment. In conclusion, these results demonstrated that ICG-ZHer3 is a promising photosensitizer for PTT against Her3-positive tumors.
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Affiliation(s)
- Huimin Liu
- Department of Pharmacy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, PR China
| | - Dianlong Jia
- Laboratory of Drug Discovery and Design, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252000, PR China
| | - Fengjiao Yuan
- Joint Laboratory for Translational Medicine Research, Liaocheng People's Hospital, Liaocheng 252000, PR China
| | - Feifei Wang
- Laboratory of Drug Discovery and Design, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252000, PR China
| | - Danfeng Wei
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Xiaohui Tang
- Department of Pharmacy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, PR China
| | - Baoqing Tian
- Department of Pharmacy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, PR China
| | - Shuhui Zheng
- Laboratory of Drug Discovery and Design, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252000, PR China
| | - Ruohan Sun
- Laboratory of Drug Discovery and Design, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252000, PR China
| | - Jing Shi
- Department of Pharmacy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, PR China.
| | - Qing Fan
- Department of Pharmacy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, PR China.
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Fang H, Cavaliere A, Li Z, Huang Y, Marquez-Nostra B. Preclinical Advances in Theranostics for the Different Molecular Subtypes of Breast Cancer. Front Pharmacol 2021; 12:627693. [PMID: 33986665 PMCID: PMC8111013 DOI: 10.3389/fphar.2021.627693] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/22/2021] [Indexed: 12/29/2022] Open
Abstract
Breast cancer is the most common cancer in women worldwide. The heterogeneity of breast cancer and drug resistance to therapies make the diagnosis and treatment difficult. Molecular imaging methods with positron emission tomography (PET) and single-photon emission tomography (SPECT) provide useful tools to diagnose, predict, and monitor the response of therapy, contributing to precision medicine for breast cancer patients. Recently, many efforts have been made to find new targets for breast cancer therapy to overcome resistance to standard of care treatments, giving rise to new therapeutic agents to offer more options for patients with breast cancer. The combination of diagnostic and therapeutic strategies forms the foundation of theranostics. Some of these theranostic agents exhibit high potential to be translated to clinic. In this review, we highlight the most recent advances in theranostics of the different molecular subtypes of breast cancer in preclinical studies.
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Affiliation(s)
- Hanyi Fang
- PET Center, Department of Radiology and Biomedical Imaging, School of Medicine, Yale University, New Haven, CT, United States.,Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Alessandra Cavaliere
- PET Center, Department of Radiology and Biomedical Imaging, School of Medicine, Yale University, New Haven, CT, United States
| | - Ziqi Li
- PET Center, Department of Radiology and Biomedical Imaging, School of Medicine, Yale University, New Haven, CT, United States.,Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiyun Huang
- PET Center, Department of Radiology and Biomedical Imaging, School of Medicine, Yale University, New Haven, CT, United States
| | - Bernadette Marquez-Nostra
- PET Center, Department of Radiology and Biomedical Imaging, School of Medicine, Yale University, New Haven, CT, United States
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Rinne SS, Orlova A, Tolmachev V. PET and SPECT Imaging of the EGFR Family (RTK Class I) in Oncology. Int J Mol Sci 2021; 22:ijms22073663. [PMID: 33915894 PMCID: PMC8036874 DOI: 10.3390/ijms22073663] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
The human epidermal growth factor receptor family (EGFR-family, other designations: HER family, RTK Class I) is strongly linked to oncogenic transformation. Its members are frequently overexpressed in cancer and have become attractive targets for cancer therapy. To ensure effective patient care, potential responders to HER-targeted therapy need to be identified. Radionuclide molecular imaging can be a key asset for the detection of overexpression of EGFR-family members. It meets the need for repeatable whole-body assessment of the molecular disease profile, solving problems of heterogeneity and expression alterations over time. Tracer development is a multifactorial process. The optimal tracer design depends on the application and the particular challenges of the molecular target (target expression in tumors, endogenous expression in healthy tissue, accessibility). We have herein summarized the recent preclinical and clinical data on agents for Positron Emission Tomography (PET) and Single Photon Emission Tomography (SPECT) imaging of EGFR-family receptors in oncology. Antibody-based tracers are still extensively investigated. However, their dominance starts to be challenged by a number of tracers based on different classes of targeting proteins. Among these, engineered scaffold proteins (ESP) and single domain antibodies (sdAb) show highly encouraging results in clinical studies marking a noticeable trend towards the use of smaller sized agents for HER imaging.
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Affiliation(s)
- Sara S. Rinne
- Department of Medicinal Chemistry, Uppsala University, 751 23 Uppsala, Sweden; (S.S.R.); (A.O.)
| | - Anna Orlova
- Department of Medicinal Chemistry, Uppsala University, 751 23 Uppsala, Sweden; (S.S.R.); (A.O.)
- Science for Life Laboratory, Uppsala University, 752 37 Uppsala, Sweden
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Vladimir Tolmachev
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia
- Department of Immunology, Genetics and Pathology, Uppsala University, 752 37 Uppsala, Sweden
- Correspondence: ; Tel.: +46-704-250-782
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Rinne SS, Dahlsson Leitao C, Saleh-Nihad Z, Mitran B, Tolmachev V, Ståhl S, Löfblom J, Orlova A. Benefit of Later-Time-Point PET Imaging of HER3 Expression Using Optimized Radiocobalt-Labeled Affibody Molecules. Int J Mol Sci 2020; 21:ijms21061972. [PMID: 32183096 PMCID: PMC7139902 DOI: 10.3390/ijms21061972] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/09/2020] [Accepted: 03/11/2020] [Indexed: 02/07/2023] Open
Abstract
HER3-binding affibody molecules are a promising format for visualization of HER3 expression. Cobalt-55, a positron-emitting isotope, with a half-life of 17.5 h, allows for next-day imaging. We investigated the influence of the charge of the radiocobalt–chelator complex on the biodistribution of anti-HER3 affibody molecule (HE)3-ZHER3 and compared the best radiocobalt-labeled variant with a recently optimized gallium-labeled variant. Affibody conjugates (HE)3-ZHER3-X (X = NOTA, NODAGA, DOTA, DOTAGA) were labeled with [57Co]Co (surrogate for 55Co). Affinity measurements, binding specificity and cellular processing were studied in two HER3-expressing cancer cell lines. Biodistribution was studied 3 and 24 h post-injection (pi) in mice with HER3-expressing BxPC-3 xenografts and compared to [68Ga]Ga-(HE)3-ZHER3-NODAGA. Micro-single-photon emission tomography/computed tomography (microSPECT/CT) and micro-positron emission tomography/computed tomography (microPET/CT) imaging was performed 3 and 24 h pi. Stably labeled conjugates bound to HER3 with subnanomolar affinity. [57Co]Co-(HE)3-ZHER3-DOTA had the best tumor retention and a significantly lower concentration in blood than other conjugates, leading to superior tumor-to-blood and tumor-to-liver ratios 24 h pi. Compared to [68Ga]Ga-(HE)3-ZHER3-NODAGA 3 h pi, [57Co]Co-(HE)3-ZHER3-DOTA provided superior imaging contrast in liver 24 h pi. Concluding, the composition and charge of the [57Co]Co–chelator complex influenced the uptake in tumors and normal tissue. [57Co]Co-(HE)3-ZHER3-DOTA provided the best imaging properties among the cobalt-labeled conjugates. Delayed imaging of HER3 expression with [57Co]Co-(HE)3-ZHER3-DOTA improved imaging contrast compared to early-time-point imaging with [68Ga]Ga-(HE)3-ZHER3-NODAGA.
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Affiliation(s)
- Sara S Rinne
- Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Charles Dahlsson Leitao
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 106 91 Stockholm, Sweden
| | - Zahra Saleh-Nihad
- Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Bogdan Mitran
- Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 85 Uppsala, Sweden
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Stefan Ståhl
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 106 91 Stockholm, Sweden
| | - John Löfblom
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 106 91 Stockholm, Sweden
| | - Anna Orlova
- Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
- Research Centrum for Oncotheranostics, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia
- Science for Life Laboratory, Uppsala University, 752 37 Uppsala, Sweden
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9
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The Diagnostic Accuracy of Magnetic Resonance Imaging in Restaging of Rectal Cancer After Preoperative Chemoradiotherapy. J Comput Assist Tomogr 2020; 44:102-110. [DOI: 10.1097/rct.0000000000000964] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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10
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Increase in negative charge of 68Ga/chelator complex reduces unspecific hepatic uptake but does not improve imaging properties of HER3-targeting affibody molecules. Sci Rep 2019; 9:17710. [PMID: 31776413 PMCID: PMC6881397 DOI: 10.1038/s41598-019-54149-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/05/2019] [Indexed: 12/17/2022] Open
Abstract
Upregulation of the human epidermal growth factor receptor type 3 (HER3) is a common mechanism to bypass HER-targeted cancer therapy. Affibody-based molecular imaging has the potential for detecting and monitoring HER3 expression during treatment. In this study, we compared the imaging properties of newly generated 68Ga-labeled anti-HER3 affibody molecules (HE)3-ZHER3-DOTA and (HE)3-ZHER3-DOTAGA with previously reported [68Ga]Ga-(HE)3-ZHER3-NODAGA. We hypothesized that increasing the negative charge of the gallium-68/chelator complex would reduce hepatic uptake, which could lead to improved contrast of anti-HER3 affibody-based PET-imaging of HER3 expression. (HE)3-ZHER3-X (X = DOTA, DOTAGA) were produced and labeled with gallium-68. Binding of the new conjugates was specific in HER3 expressing BxPC-3 and DU145 human cancer cells. Biodistribution and in vivo specificity was studied in BxPC-3 xenograft bearing Balb/c nu/nu mice 3 h pi. DOTA- and DOTAGA-containing conjugates had significantly higher concentration in blood than [68Ga]Ga-(HE)3-ZHER3-NODAGA. Presence of the negatively charged 68Ga-DOTAGA complex reduced the unspecific hepatic uptake, but did not improve overall biodistribution of the conjugate. [68Ga]Ga-(HE)3-ZHER3-DOTAGA and [68Ga]Ga-(HE)3-ZHER3-NODAGA had similar tumor-to-liver ratios, but [68Ga]Ga-(HE)3-ZHER3-NODAGA had the highest tumor uptake and tumor-to-blood ratio among the tested conjugates. In conclusion, [68Ga]Ga-(HE)3-ZHER3-NODAGA remains the favorable variant for PET imaging of HER3 expression.
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11
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Improved contrast of affibody-mediated imaging of HER3 expression in mouse xenograft model through co-injection of a trivalent affibody for in vivo blocking of hepatic uptake. Sci Rep 2019; 9:6779. [PMID: 31043683 PMCID: PMC6494909 DOI: 10.1038/s41598-019-43145-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/12/2019] [Indexed: 11/08/2022] Open
Abstract
Human epidermal growth factor receptor type 3 (HER3) plays a crucial role in the progression of many cancer types. In vivo radionuclide imaging could be a reliable method for repetitive detection of HER3-expression in tumors. The main challenge of HER3-imaging is the low expression in tumors together with endogenous receptor expression in normal tissues, particularly the liver. A HER3-targeting affibody molecule labeled with radiocobalt via a NOTA chelator [57Co]Co-NOTA-Z08699 has demonstrated the most favorable biodistribution profile with the lowest unspecific hepatic uptake and high activity uptake in tumors. We hypothesized that specific uptake of labeled affibody monomer might be selectively blocked in the liver but not in tumors by a co-injection of non-labeled corresponding trivalent affibody (Z08699)3. Biodistribution of [57Co]Co-NOTA-Z08699 and [111In]In-DOTA-(Z08699)3 was studied in BxPC-3 xenografted mice. [57Co]Co-NOTA-Z08699 was co-injected with unlabeled trivalent affibody DOTA-(Z08699)3 at different monomer:trimer molar ratios. HER3-expression in xenografts was imaged using [57Co]Co-NOTA-Z08699 and [57Co]Co-NOTA-Z08699: DOTA-(Z08699)3. Hepatic activity uptake of [57Co]Co-NOTA-Z08699: DOTA-(Z08699)3 decreased with increasing monomer:trimer molar ratio. The tumor activity uptake and tumor-to-liver ratios were the highest for the 1:3 ratio. SPECT/CT images confirmed the biodistribution data. Imaging of HER3 expression can be improved by co-injection of a radiolabeled monomeric affibody-based imaging probe together with a trivalent affibody.
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12
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Molecular Design of HER3-Targeting Affibody Molecules: Influence of Chelator and Presence of HEHEHE-Tag on Biodistribution of 68Ga-Labeled Tracers. Int J Mol Sci 2019; 20:ijms20051080. [PMID: 30832342 PMCID: PMC6429182 DOI: 10.3390/ijms20051080] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/13/2019] [Accepted: 02/26/2019] [Indexed: 12/27/2022] Open
Abstract
Affibody-based imaging of HER3 is a promising approach for patient stratification. We investigated the influence of a hydrophilic HEHEHE-tag ((HE)3-tag) and two different gallium-68/chelator-complexes on the biodistribution of Z08698 with the aim to improve the tracer for PET imaging. Affibody molecules (HE)3-Z08698-X and Z08698-X (X = NOTA, NODAGA) were produced and labeled with gallium-68. Binding specificity and cellular processing were studied in HER3-expressing human cancer cell lines BxPC-3 and DU145. Biodistribution was studied 3 h p.i. in Balb/c nu/nu mice bearing BxPC-3 xenografts. Mice were imaged 3 h p.i. using microPET/CT. Conjugates were stably labeled with gallium-68 and bound specifically to HER3 in vitro and in vivo. Association to cells was rapid but internalization was slow. Uptake in tissues, including tumors, was lower for (HE)3-Z08698-X than for non-tagged variants. The neutral [68Ga]Ga-NODAGA complex reduced the hepatic uptake of Z08698 compared to positively charged [68Ga]Ga-NOTA-conjugated variants. The influence of the chelator was more pronounced in variants without (HE)3-tag. In conclusion, hydrophilic (HE)3-tag and neutral charge of the [68Ga]Ga-NODAGA complex promoted blood clearance and lowered hepatic uptake of Z08698. [68Ga]Ga-(HE)3-Z08698-NODAGA was considered most promising, providing the lowest blood and hepatic uptake and the best imaging contrast among the tested variants.
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13
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Rinne SS, Leitao CD, Mitran B, Bass TZ, Andersson KG, Tolmachev V, Ståhl S, Löfblom J, Orlova A. Optimization of HER3 expression imaging using affibody molecules: Influence of chelator for labeling with indium-111. Sci Rep 2019; 9:655. [PMID: 30679757 PMCID: PMC6345776 DOI: 10.1038/s41598-018-36827-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 11/09/2018] [Indexed: 12/21/2022] Open
Abstract
Radionuclide molecular imaging of human epidermal growth factor receptor 3 (HER3) expression using affibody molecules could be used for patient stratification for HER3-targeted cancer therapeutics. We hypothesized that the properties of HER3-targeting affibody molecules might be improved through modification of the radiometal-chelator complex. Macrocyclic chelators NOTA (1,4,7-triazacyclononane-N,N',N''-triacetic acid), NODAGA (1-(1,3-carboxypropyl)-4,7-carboxymethyl-1,4,7-triazacyclononane), DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid), and DOTAGA (1,4,7,10-tetraazacyclododececane,1-(glutaric acid)-4,7,10-triacetic acid) were conjugated to the C-terminus of anti-HER3 affibody molecule Z08698 and conjugates were labeled with indium-111. All conjugates bound specifically and with picomolar affinity to HER3 in vitro. In mice bearing HER3-expressing xenografts, no significant difference in tumor uptake between the conjugates was observed. Presence of the negatively charged 111In-DOTAGA-complex resulted in the lowest hepatic uptake and the highest tumor-to-liver ratio. In conclusion, the choice of chelator influences the biodistribution of indium-111 labeled anti-HER3 affibody molecules. Hepatic uptake of anti-HER3 affibody molecules could be reduced by the increase of negative charge of the radiometal-chelator complex on the C-terminus without significantly influencing the tumor uptake.
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Affiliation(s)
- Sara S Rinne
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Charles Dahlsson Leitao
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Bogdan Mitran
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Tarek Z Bass
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Ken G Andersson
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Stefan Ståhl
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - John Löfblom
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Anna Orlova
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden.
- Science for Life Laboratory, Uppsala University, Uppsala, Sweden.
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14
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Influence of Molecular Design on the Targeting Properties of ABD-Fused Mono- and Bi-Valent Anti-HER3 Affibody Therapeutic Constructs. Cells 2018; 7:cells7100164. [PMID: 30314301 PMCID: PMC6210767 DOI: 10.3390/cells7100164] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 09/23/2018] [Accepted: 10/08/2018] [Indexed: 01/26/2023] Open
Abstract
Overexpression of human epidermal growth factor receptor type 3 (HER3) is associated with tumour cell resistance to HER-targeted therapies. Monoclonal antibodies (mAbs) targeting HER3 are currently being investigated for treatment of various types of cancers. Cumulative evidence suggests that affibody molecules may be appropriate alternatives to mAbs. We previously reported a fusion construct (3A3) containing two HER3-targeting affibody molecules flanking an engineered albumin-binding domain (ABD035) included for the extension of half-life in circulation. The 3A3 fusion protein (19.7 kDa) was shown to delay tumour growth in mice bearing HER3-expressing xenografts and was equipotent to the mAb seribantumab. Here, we have designed and explored a series of novel formats of anti-HER3 affibody molecules fused to the ABD in different orientations. All constructs inhibited heregulin-induced phosphorylation in HER3-expressing BxPC-3 and DU-145 cell lines. Biodistribution studies demonstrated extended the half-life of all ABD-fused constructs, although at different levels. The capacity of our ABD-fused proteins to accumulate in HER3-expressing tumours was demonstrated in nude mice bearing BxPC-3 xenografts. Formats where the ABD was located on the C-terminus of affibody binding domains (3A, 33A, and 3A3) provided the best tumour targeting properties in vivo. Further development of these promising candidates for treatment of HER3-overexpressing tumours is therefore justified.
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15
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Orlova A, Bass TZ, Rinne SS, Leitao CD, Rosestedt M, Atterby C, Gudmundsdotter L, Frejd FY, Löfblom J, Tolmachev V, Ståhl S. Evaluation of the Therapeutic Potential of a HER3-Binding Affibody Construct TAM-HER3 in Comparison with a Monoclonal Antibody, Seribantumab. Mol Pharm 2018; 15:3394-3403. [PMID: 29995421 DOI: 10.1021/acs.molpharmaceut.8b00393] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Human epidermal growth factor receptor type 3 (HER3) is recognized to be involved in resistance to HER-targeting therapies. A number of HER3-targeting monoclonal antibodies are under clinical investigation as potential cancer therapeutics. Smaller high-affinity scaffold proteins are attractive non-Fc containing alternatives to antibodies. A previous study indicated that anti-HER3 affibody molecules could delay the growth of xenografted HER3-positive tumors. Here, we designed a second-generation HER3-targeting construct (TAM-HER3), containing two HER3-specific affibody molecules bridged by an albumin-binding domain (ABD) for extension of blood circulation. Receptor blocking activity was demonstrated in vitro. In mice bearing BxPC-3 xenografts, the therapeutic efficacy of TAM-HER3 was compared to the HER3-specific monoclonal antibody seribantumab (MM-121). TAM-HER3 inhibited heregulin-induced phosphorylation in a panel of HER3-expressing cancer cells and was found to be equally as potent as seribantumab in terms of therapeutic efficacy in vivo and with a similar safety profile. Median survival times were 60 days for TAM-HER3, 54 days for seribantumab, and 41 days for the control group. No pathological changes were observed in cytopathological examination. The multimeric HER3-binding affibody molecule in fusion to ABD seems promising for further evaluation as candidate therapeutics for treatment of HER3-overexpressing tumors.
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Affiliation(s)
- Anna Orlova
- Department of Medicinal Chemistry , Uppsala University , Uppsala , Sweden.,Science for Life Laboratory , Uppsala University , Uppsala , Sweden
| | - Tarek Z Bass
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , Stockholm , Sweden
| | - Sara S Rinne
- Department of Medicinal Chemistry , Uppsala University , Uppsala , Sweden
| | - Charles Dahlsson Leitao
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , Stockholm , Sweden
| | - Maria Rosestedt
- Department of Medicinal Chemistry , Uppsala University , Uppsala , Sweden
| | - Christina Atterby
- Department of Immunology, Genetics and Pathology , Uppsala University , Uppsala , Sweden
| | | | - Fredrik Y Frejd
- Department of Immunology, Genetics and Pathology , Uppsala University , Uppsala , Sweden.,Affibody AB , Solna , Sweden
| | - John Löfblom
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , Stockholm , Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology , Uppsala University , Uppsala , Sweden
| | - Stefan Ståhl
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , Stockholm , Sweden
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16
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Henry KE, Ulaner GA, Lewis JS. Clinical Potential of Human Epidermal Growth Factor Receptor 2 and Human Epidermal Growth Factor Receptor 3 Imaging in Breast Cancer. PET Clin 2018; 13:423-435. [PMID: 30100080 PMCID: PMC6092024 DOI: 10.1016/j.cpet.2018.02.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Increased expression of the human epidermal growth factor receptor (HER) protein family are targets in breast cancer for imaging and therapy. Imaging modalities targeting HER2 and HER3 can diagnose breast cancer with a specific, biologically relevant target. Repeat biopsies do not address heterogeneity intratumorally or between primary disease and metastasis. HER2- and HER3-targeted PET is an important tool to diagnose disease in breast cancer and evaluate response to targeted therapies. PET and single photon emission computed tomography with radiolabeled biomolecules can be used to detect and quantify specific targets, conferring a better understanding of the behavior and effectiveness of treatments.
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Affiliation(s)
- Kelly E Henry
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA.
| | - Gary A Ulaner
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; Department of Radiology, Weill Cornell Medical College, 1275 York Avenue, New York, NY 10065, USA
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; Department of Radiology, Weill Cornell Medical College, 1275 York Avenue, New York, NY 10065, USA; Program in Molecular Pharmacology and Chemistry, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; Department of Pharmacology, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA; Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
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17
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Comparative Evaluation of Radioiodine and Technetium-Labeled DARPin 9_29 for Radionuclide Molecular Imaging of HER2 Expression in Malignant Tumors. CONTRAST MEDIA & MOLECULAR IMAGING 2018; 2018:6930425. [PMID: 29977173 PMCID: PMC6011117 DOI: 10.1155/2018/6930425] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/14/2018] [Accepted: 04/22/2018] [Indexed: 02/08/2023]
Abstract
High expression of human epidermal growth factor receptor 2 (HER2) in breast and gastroesophageal carcinomas is a predictive biomarker for treatment using HER2-targeted therapeutics (antibodies trastuzumab and pertuzumab, antibody-drug conjugate trastuzumab DM1, and tyrosine kinase inhibitor lapatinib). Radionuclide molecular imaging of HER2 expression might permit stratification of patients for HER2-targeting therapies. In this study, we evaluated a new HER2-imaging probe based on the designed ankyrin repeat protein (DARPin) 9_29. DARPin 9_29 was labeled with iodine-125 by direct radioiodination and with [99mTc]Tc(CO)3 using the C-terminal hexahistidine tag. DARPin 9_29 preserved high specificity and affinity of binding to HER2-expressing cells after labeling. Uptake of [125I]I-DARPin 9_29 and [99mTc]Tc(CO)3-DARPin 9_29 in HER2-positive SKOV-3 xenografts in mice at 6 h after injection was 3.4 ± 0.7 %ID/g and 2.9 ± 0.7 %ID/g, respectively. This was significantly (p < 0.00005) higher than the uptake of the same probes in HER2-negative Ramos lymphoma xenografts, 0.22 ± 0.09 %ID/g and 0.30 ± 0.05 %ID/g, respectively. Retention of [125I]I-DARPin 9_29 in the lung, liver, spleen, and kidneys was appreciably lower compared with [99mTc]Tc(CO)3-DARPin 9_29, which resulted in significantly (p < 0.05) higher tumor-to-organ ratios. The biodistribution data were confirmed by SPECT/CT imaging. In conclusion, radioiodine is a preferable label for DARPin 9_29.
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18
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Imaging of human epidermal growth factor receptors for patient selection and response monitoring – From PET imaging and beyond. Cancer Lett 2018; 419:139-151. [DOI: 10.1016/j.canlet.2018.01.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 01/12/2018] [Accepted: 01/18/2018] [Indexed: 12/20/2022]
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19
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Weinmann C, Holland JP, Läppchen T, Scherer H, Maus S, Stemler T, Bohnenberger H, Ezziddin S, Kurz P, Bartholomä MD. Optimized synthesis and indium complex formation with the bifunctional chelator NODIA-Me. Org Biomol Chem 2018; 16:7503-7512. [DOI: 10.1039/c8ob01981a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Multi-step synthetic route provides the ligand NODIA-Me in high yield. Radiolabeling with [111In]InCl3 yields stable complexes in high radiochemical purity and yield.
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Affiliation(s)
- Christian Weinmann
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Institute for Inorganic and Analytical Chemistry
| | | | - Tilman Läppchen
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Department of Nuclear Medicine
| | - Harald Scherer
- Institute for Inorganic and Analytical Chemistry
- Albert-Ludwigs-University Freiburg
- Freiburg
- Germany
| | - Stephan Maus
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Tobias Stemler
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Hendrik Bohnenberger
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Samer Ezziddin
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Philipp Kurz
- Institute for Inorganic and Analytical Chemistry
- Albert-Ludwigs-University Freiburg
- Freiburg
- Germany
| | - Mark D. Bartholomä
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Department of Nuclear Medicine
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20
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Rosestedt M, Andersson KG, Mitran B, Rinne SS, Tolmachev V, Löfblom J, Orlova A, Ståhl S. Evaluation of a radiocobalt-labelled affibody molecule for imaging of human epidermal growth factor receptor 3 expression. Int J Oncol 2017; 51:1765-1774. [PMID: 29039474 DOI: 10.3892/ijo.2017.4152] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 08/25/2017] [Indexed: 11/06/2022] Open
Abstract
The human epidermal growth factor receptor 3 (HER3) is involved in the development of cancer resistance towards tyrosine kinase-targeted therapies. Several HER3‑targeting therapeutics are currently under clinical evaluation. Non-invasive imaging of HER3 expression could improve patient management. Affibody molecules are small engineered scaffold proteins demonstrating superior properties as targeting probes for molecular imaging compared with monoclonal antibodies. Feasibility of in vivo HER3 imaging using affibody molecules has been previously demonstrated. Preclinical studies have shown that the contrast when imaging using anti-HER3 affibody molecules can be improved over time. We aim to develop an agent for PET imaging of HER3 expression using the long-lived positron-emitting radionuclide cobalt-55 (55Co) (T1/2=17.5 h). A long-lived cobalt isotope 57Co was used as a surrogate for 55Co in this study. The anti-HER3 affibody molecule HEHEHE-ZHER3-NOTA was labelled with radiocobalt with high yield, purity and stability. Biodistribution of 57Co-HEHEHE-ZHER3-NOTA was measured in mice bearing DU145 (prostate carcinoma) and LS174T (colorectal carcinoma) xenografts at 3 and 24 h post injection (p.i.). Tumour-to-blood ratios significantly increased between 3 and 24 h p.i. (p<0.05). At 24 h p.i., tumour-to-blood ratios were 6 for DU145 and 8 for LS174T xenografts, respectively. HER3‑expressing xenografts were clearly visualized in a preclinical imaging setting already 3 h p.i., and contrast further improved at 24 h p.i. In conclusion, the radiocobalt-labelled anti-HER3 affibody molecule, HEHEHE-ZHER3-NOTA, is a promising tracer for imaging of HER3 expression in tumours.
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Affiliation(s)
- Maria Rosestedt
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Ken G Andersson
- Division of Protein Technology, KTH - Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Bogdan Mitran
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Sara S Rinne
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, 751 83 Uppsala, Sweden
| | - John Löfblom
- Division of Protein Technology, KTH - Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Anna Orlova
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, 751 83 Uppsala, Sweden
| | - Stefan Ståhl
- Division of Protein Technology, KTH - Royal Institute of Technology, SE-106 91 Stockholm, Sweden
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Pool M, Kol A, de Jong S, de Vries EGE, Lub-de Hooge MN, Terwisscha van Scheltinga AGT. 89Zr-mAb3481 PET for HER3 tumor status assessment during lapatinib treatment. MAbs 2017; 9:1370-1378. [PMID: 28873009 PMCID: PMC5680796 DOI: 10.1080/19420862.2017.1371382] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Treatment of human epidermal growth factor receptor 2 (HER2)-driven breast cancer with tyrosine kinase inhibitor lapatinib can induce a compensatory HER3 increase, which may attenuate antitumor efficacy. Therefore, we explored in vivo HER3 tumor status assessment after lapatinib treatment with zirconium-89 (89Zr)-labeled anti-HER3 antibody mAb3481 positron emission tomography (PET). Lapatinib effects on HER3 cell surface expression and mAb3481 internalization were evaluated in human breast (BT474, SKBR3) and gastric (N87) cancer cell lines using flow cytometry. Next, in vivo effects of daily lapatinib treatment on89Zr-mAb3481 BT474 and N87 xenograft tumor uptake were studied. PET-scans (BT474 only) were made after daily lapatinib treatment for 9 days, starting 3 days prior to 89Zr-mAb3481 administration. Subsequently, ex vivo 89Zr-mAb3481 organ distribution analysis was performed and HER3 tumor levels were measured with Western blot and immunohistochemistry. In vitro, lapatinib increased membranous HER3 in BT474, SKBR3 and N87 cells, and consequently mAb3481 internalization 1.7-fold (BT474), 1.4-fold (SKBR3) and 1.4-fold (N87). 89Zr-mAb3481 BT474 tumor uptake was remarkably high at SUVmean 5.6±0.6 (51.8±7.7%ID/g) using a 10 μg 89Zr-mAb3481 protein dose in vehicle-treated mice. However, compared to vehicle, lapatinib did not affect 89Zr-mAb3481 ex vivo uptake in BT474 and N87 tumors, while HER3 tumor expression remained unchanged. In conclusion, lapatinib increased in vitro HER3 tumor cell expression, but not when these cells were xenografted. 89Zr-mAb3481 PET accurately reflected HER3 tumor status. 89Zr-mAb3481 PET showed high, HER3-specific tumor uptake, and such an approach might sensitively assess HER3 tumor heterogeneity and treatment response in patients.
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Affiliation(s)
- Martin Pool
- a Departments of Medical Oncology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Arjan Kol
- a Departments of Medical Oncology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Steven de Jong
- a Departments of Medical Oncology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Elisabeth G E de Vries
- a Departments of Medical Oncology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Marjolijn N Lub-de Hooge
- b Departments of Clinical Pharmacy and Pharmacology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands.,c Departments of Nuclear Medicine and Molecular Imaging , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Anton G T Terwisscha van Scheltinga
- b Departments of Clinical Pharmacy and Pharmacology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
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22
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Pool M, de Boer HR, Hooge MNLD, van Vugt MA, de Vries EG. Harnessing Integrative Omics to Facilitate Molecular Imaging of the Human Epidermal Growth Factor Receptor Family for Precision Medicine. Theranostics 2017; 7:2111-2133. [PMID: 28638489 PMCID: PMC5479290 DOI: 10.7150/thno.17934] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 03/02/2017] [Indexed: 12/13/2022] Open
Abstract
Cancer is a growing problem worldwide. The cause of death in cancer patients is often due to treatment-resistant metastatic disease. Many molecularly targeted anticancer drugs have been developed against 'oncogenic driver' pathways. However, these treatments are usually only effective in properly selected patients. Resistance to molecularly targeted drugs through selective pressure on acquired mutations or molecular rewiring can hinder their effectiveness. This review summarizes how molecular imaging techniques can potentially facilitate the optimal implementation of targeted agents. Using the human epidermal growth factor receptor (HER) family as a model in (pre)clinical studies, we illustrate how molecular imaging may be employed to characterize whole body target expression as well as monitor drug effectiveness and the emergence of tumor resistance. We further discuss how an integrative omics discovery platform could guide the selection of 'effect sensors' - new molecular imaging targets - which are dynamic markers that indicate treatment effectiveness or resistance.
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Affiliation(s)
- Martin Pool
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - H. Rudolf de Boer
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Marjolijn N. Lub-de Hooge
- Department of Clinical Pharmacy and Pharmacology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Marcel A.T.M. van Vugt
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Elisabeth G.E. de Vries
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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23
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In vivo evaluation of a novel format of a bivalent HER3-targeting and albumin-binding therapeutic affibody construct. Sci Rep 2017; 7:43118. [PMID: 28230065 PMCID: PMC5322329 DOI: 10.1038/srep43118] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 01/19/2017] [Indexed: 01/21/2023] Open
Abstract
Overexpression of human epidermal growth factor receptor 3 (HER3) is involved in resistance to several therapies for malignant tumours. Currently, several anti-HER3 monoclonal antibodies are under clinical development. We introduce an alternative approach to HER3-targeted therapy based on engineered scaffold proteins, i.e. affibody molecules. We designed a small construct (22.5 kDa, denoted 3A3), consisting of two high-affinity anti-HER3 affibody molecules flanking an albumin-binding domain ABD, which was introduced for prolonged residence in circulation. In vitro, 3A3 efficiently inhibited growth of HER3-expressing BxPC-3 cells. Biodistribution in mice was measured using 3A3 that was site-specifically labelled with 111In via a DOTA chelator. The residence time of 111In-DOTA-3A3 in blood was extended when compared with the monomeric affibody molecule. 111In-DOTA-3A3 accumulated specifically in HER3-expressing BxPC-3 xenografts in mice. However, 111In-DOTA-3A3 cleared more rapidly from blood than a size-matched control construct 111In-DOTA-TAT, most likely due to sequestering of 3A3 by mErbB3, the murine counterpart of HER3. Repeated dosing and increase of injected protein dose decreased uptake of 111In-DOTA-3A3 in mErbB3-expressing tissues. Encouragingly, growth of BxPC-3 xenografts in mice was delayed in an experimental (pilot-scale) therapy study using 3A3. We conclude that the 3A3 affibody format seems promising for treatment of HER3-overexpressing tumours.
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Garousi J, Lindbo S, Honarvar H, Velletta J, Mitran B, Altai M, Orlova A, Tolmachev V, Hober S. Influence of the N-Terminal Composition on Targeting Properties of Radiometal-Labeled Anti-HER2 Scaffold Protein ADAPT6. Bioconjug Chem 2016; 27:2678-2688. [PMID: 27740752 DOI: 10.1021/acs.bioconjchem.6b00465] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Radionuclide-imaging-based stratification of patients to targeted therapies makes cancer treatment more personalized and therefore more efficient. Albumin-binding domain derived affinity proteins (ADAPTs) constitute a novel group of imaging probes based on the scaffold of an albumin-binding domain (ABD). To evaluate how different compositions of the N-terminal sequence of ADAPTs influence their biodistribution, a series of human epidermal growth factor receptor type 2 (HER2)-binding ADAPT6 derivatives with different N-terminal sequences were created: GCH6DANS (2), GC(HE)3DANS (3), GCDEAVDANS (4), and GCVDANS(5). These were compared with the parental variant: GCSS(HE)3DEAVDANS (1). All variants were site-specifically conjugated with a maleimido-derivative of a DOTA chelator and labeled with 111In. Binding to HER2-expressing cells in vitro, in vivo biodistribution as well as targeting properties of the new variants were compared with properties of the 111In-labeled parental ADAPT variant 1 (111In-DOTA-1). The composition of the N-terminal sequence had an apparent influence on biodistribution of ADAPT6 in mice. The use of a hexahistidine tag in 111In-DOTA-2 was associated with elevated hepatic uptake compared to the (HE)3-containing counterpart, 111In-DOTA-3. All new variants without a hexahistidine tag demonstrated lower uptake in blood, lung, spleen, and muscle compared to uptake in the parental variant. The best new variants, 111In-DOTA-3 and 111In-DOTA-5, provided tumor uptakes of 14.6 ± 2.4 and 12.5 ± 1.3% ID/g at 4 h after injection, respectively. The tumor uptake of 111In-DOTA-3 was significantly higher than the uptake of the parental 111In-DOTA-1 (9.1 ± 2.0% ID/g). The tumor-to-blood ratios of 395 ± 75 and 419 ± 91 at 4 h after injection were obtained for 111In-DOTA-5 and 111In-DOTA-3, respectively. In conclusion, the N-terminal sequence composition affects the biodistribution and targeting properties of ADAPT-based imaging probes, and its optimization may improve imaging contrast.
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Affiliation(s)
- Javad Garousi
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75185 Uppsala, Sweden
| | - Sarah Lindbo
- Department of Protein Technology, KTH - Royal Institute of Technology , SE-10691 Stockholm, Sweden
| | - Hadis Honarvar
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75185 Uppsala, Sweden
| | - Justin Velletta
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75185 Uppsala, Sweden
| | - Bogdan Mitran
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University , SE-75181 Uppsala, Sweden
| | - Mohamed Altai
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75185 Uppsala, Sweden
| | - Anna Orlova
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University , SE-75181 Uppsala, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75185 Uppsala, Sweden
| | - Sophia Hober
- Department of Protein Technology, KTH - Royal Institute of Technology , SE-10691 Stockholm, Sweden
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25
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Andersson KG, Oroujeni M, Garousi J, Mitran B, Ståhl S, Orlova A, Löfblom J, Tolmachev V. Feasibility of imaging of epidermal growth factor receptor expression with ZEGFR:2377 affibody molecule labeled with 99mTc using a peptide-based cysteine-containing chelator. Int J Oncol 2016; 49:2285-2293. [PMID: 27748899 PMCID: PMC5118000 DOI: 10.3892/ijo.2016.3721] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 08/30/2016] [Indexed: 12/13/2022] Open
Abstract
The epidermal growth factor receptor (EGFR) is overexpressed in a number of malignant tumors and is a molecular target for several specific anticancer antibodies and tyrosine kinase inhibitors. The overexpression of EGFR is a predictive biomarker for response to several therapy regimens. Radionuclide molecular imaging might enable detection of EGFR overexpression by a non-invasive procedure and could be used repeatedly. Affibody molecules are engineered scaffold proteins, which could be selected to have a high affinity and selectivity to predetermined targets. The anti-EGFR ZEGFR:2377 affibody molecule is a potential imaging probe for EGFR detection. The use of the generator-produced radionuclide 99mTc should facilitate clinical translation of an imaging probe due to its low price, availability and favorable dosimetry of the radionuclide. In the present study, we evaluated feasibility of ZEGFR:2377 labeling with 99mTc using a peptide-based cysteine-containing chelator expressed at the C-terminus of ZEGFR:2377. The label was stable in vitro under cysteine challenge. In addition, 99mTc-ZEGFR:2377 was capable of specific binding to EGFR-expressing cells with high affinity (274 pM). Studies in BALB/C nu/nu mice bearing A431 xenografts demonstrated that 99mTc-ZEGFR:2377 accumulates in tumors in an EGFR-specific manner. The tumor uptake values were 3.6±1 and 2.5±0.4% ID/g at 3 and 24 h after injection, respectively. The corresponding tumor-to-blood ratios were 1.8±0.4 and 8±3. The xenografts were clearly visualized at both time-points. This study demonstrated the potential of 99mTc-labeled ZEGFR:2377 for imaging of EGFR in vivo.
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Affiliation(s)
- Ken G Andersson
- Division of Protein Technology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Maryam Oroujeni
- Institute of Immunology, Genetic and Pathology, Uppsala University, SE-75185 Uppsala, Sweden
| | - Javad Garousi
- Institute of Immunology, Genetic and Pathology, Uppsala University, SE-75185 Uppsala, Sweden
| | - Bogdan Mitran
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, SE-75183 Uppsala, Sweden
| | - Stefan Ståhl
- Division of Protein Technology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Anna Orlova
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University, SE-75183 Uppsala, Sweden
| | - John Löfblom
- Division of Protein Technology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Vladimir Tolmachev
- Institute of Immunology, Genetic and Pathology, Uppsala University, SE-75185 Uppsala, Sweden
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26
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Garousi J, Honarvar H, Andersson KG, Mitran B, Orlova A, Buijs J, Löfblom J, Frejd FY, Tolmachev V. Comparative Evaluation of Affibody Molecules for Radionuclide Imaging of in Vivo Expression of Carbonic Anhydrase IX. Mol Pharm 2016; 13:3676-3687. [PMID: 27529191 DOI: 10.1021/acs.molpharmaceut.6b00502] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Overexpression of the enzyme carbonic anhydrase IX (CAIX) is documented for chronically hypoxic malignant tumors as well as for normoxic renal cell carcinoma. Radionuclide molecular imaging of CAIX would be useful for detection of hypoxic areas in malignant tumors, for patients' stratification for CAIX-targeted therapies, and for discrimination of primary malignant and benign renal tumors. Earlier, we have reported feasibility of in vivo radionuclide based imaging of CAIX expressing tumors using Affibody molecules, small affinity proteins based on a nonimmunoglobulin scaffold. In this study, we compared imaging properties of several anti-CAIX Affibody molecules having identical scaffold parts and competing for the same epitope on CAIX, but having different binding paratopes. Four variants were labeled using residualizing 99mTc and nonresidualizing 125I labels. All radiolabeled variants demonstrated high-affinity detection of CAIX-expressing cell line SK-RC-52 in vitro and specific accumulation in SK-RC-52 xenografts in vivo. 125I-labeled conjugates demonstrated much lower radioactivity uptake in kidneys but higher radioactivity concentration in blood compared with 99mTc-labeled counterparts. Although all variants cleared rapidly from blood and nonspecific compartments, there was noticeable difference in their biodistribution. The best variant for imaging of expression of CAIX in disseminated cancer was 99mTc-(HE)3-ZCAIX:2 providing tumor uptake of 16.3 ± 0.9% ID/g and tumor-to-blood ratio of 44 ± 7 at 4 h after injection. For primary renal cell carcinoma, the most promising imaging candidate was 125I-ZCAIX:4 providing tumor-kidney ratio of 2.1 ± 0.5. In conclusion, several clones of scaffold proteins should be evaluated to select the best variant for development of an imaging probe with optimal sensitivity for the intended application.
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Affiliation(s)
- Javad Garousi
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75285 Uppsala, Sweden
| | - Hadis Honarvar
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75285 Uppsala, Sweden
| | - Ken G Andersson
- Division of Protein Technology, School of Biotechnology, KTH-Royal Institute of Technology , SE-106 91 Stockholm, Sweden
| | - Bogdan Mitran
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University , SE-751 83 Uppsala, Sweden
| | - Anna Orlova
- Division of Molecular Imaging, Department of Medicinal Chemistry, Uppsala University , SE-751 83 Uppsala, Sweden
| | - Jos Buijs
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75285 Uppsala, Sweden.,Ridgeview Instruments AB , SE-74020 Vänge, Sweden
| | - John Löfblom
- Division of Protein Technology, School of Biotechnology, KTH-Royal Institute of Technology , SE-106 91 Stockholm, Sweden
| | - Fredrik Y Frejd
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75285 Uppsala, Sweden.,Affibody AB , SE-171 63 Stockholm, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University , SE-75285 Uppsala, Sweden
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27
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Malm M, Frejd FY, Ståhl S, Löfblom J. Targeting HER3 using mono- and bispecific antibodies or alternative scaffolds. MAbs 2016; 8:1195-1209. [PMID: 27532938 PMCID: PMC5058629 DOI: 10.1080/19420862.2016.1212147] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The human epidermal growth factor receptor 3 (HER3) has in recent years been recognized as a key node in the complex signaling network of many different cancers. It is implicated in de novo and acquired resistance against therapies targeting other growth factor receptors, e.g., EGFR, HER2, and it is a major activator of the PI3K/Akt signaling pathway. Consequently, HER3 has attracted substantial attention, and is today a key target for drugs in clinical development. Sophisticated protein engineering approaches have enabled the generation of a range of different affinity proteins targeting this receptor, including antibodies and alternative scaffolds that are either mono- or bispecific. Here, we describe HER3 and its role as a key tumor target, and give a comprehensive review of HER3-targeted proteins currently in development, including discussions on the opportunities and challenges of targeting this receptor.
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Affiliation(s)
- Magdalena Malm
- a Division of Protein Technology, School of Biotechnology, KTH-Royal Institute of Technology, SE , Stockholm
| | - Fredrik Y Frejd
- b Affibody AB, SE, Stockholm , Sweden.,c Department of Immunology , Genetics and Pathology, Uppsala University , Uppsala , Sweden
| | - Stefan Ståhl
- a Division of Protein Technology, School of Biotechnology, KTH-Royal Institute of Technology, SE , Stockholm
| | - John Löfblom
- a Division of Protein Technology, School of Biotechnology, KTH-Royal Institute of Technology, SE , Stockholm
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28
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Da Pieve C, Allott L, Martins CD, Vardon A, Ciobota DM, Kramer-Marek G, Smith G. Efficient [(18)F]AlF Radiolabeling of ZHER3:8698 Affibody Molecule for Imaging of HER3 Positive Tumors. Bioconjug Chem 2016; 27:1839-49. [PMID: 27357023 DOI: 10.1021/acs.bioconjchem.6b00259] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The human epidermal growth factor receptor 3 (HER3) is overexpressed in several cancers, being linked to a more resistant phenotype and hence leading to poor patient prognosis. Imaging HER3 is challenging owing to the modest receptor number (<50000 receptors/cell) in overexpressing cancer cells. Therefore, to image HER3 in vivo, high target affinity PET probes need to be developed. This work describes two different [(18)F]AlF radiolabeling strategies of the ZHER3:8698 affibody molecule specifically targeting HER3. The one-pot radiolabeling of ZHER3:8698 performed at 100 °C and using 1,4,7-triazanonane-1,4,7-triacetate (NOTA) as chelator resulted in radiolabeled products with variable purity attributed to radioconjugate thermolysis. An alternative approach based on the inverse electron demand Diels-Alder (IEDDA) reaction between a novel tetrazine functionalized 1,4,7-triazacyclononane-1,4-diacetate (NODA) chelator and the trans-cyclooctene (TCO) functionalized affibody molecule was also investigated. This method enabled the radiolabeling of the protein at room temperature. The [(18)F]AlF-NOTA-ZHER3:8698 and [(18)F]AlF-NODA-ZHER3:8698 conjugates showed a specific uptake at 1 h after injection in high HER3-expressing MCF-7 tumors of 4.36 ± 0.92% ID/g and 4.96 ± 0.65% ID/g, respectively. The current results are encouraging for further investigation of [(18)F]AlF-NOTA-ZHER3:8698 as a HER3 imaging agent.
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Affiliation(s)
- Chiara Da Pieve
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Louis Allott
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Carlos D Martins
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Andrew Vardon
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Daniela M Ciobota
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Gabriela Kramer-Marek
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
| | - Graham Smith
- Division of Radiotherapy and Imaging, The Institute of Cancer Research , 123 Old Brompton Road, London SW7 3RP, U.K
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29
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Rosestedt M, Andersson KG, Mitran B, Tolmachev V, Löfblom J, Orlova A, Ståhl S. Affibody-mediated PET imaging of HER3 expression in malignant tumours. Sci Rep 2015; 5:15226. [PMID: 26477646 PMCID: PMC4609989 DOI: 10.1038/srep15226] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 09/17/2015] [Indexed: 01/02/2023] Open
Abstract
Human epidermal growth factor receptor 3 (HER3) is involved in the progression of various cancers and in resistance to therapies targeting the HER family. In vivo imaging of HER3 expression would enable patient stratification for anti-HER3 immunotherapy. Key challenges with HER3-targeting are the relatively low expression in HER3-positive tumours and HER3 expression in normal tissues. The use of positron-emission tomography (PET) provides advantages of high resolution, sensitivity and quantification accuracy compared to SPECT. Affibody molecules, imaging probes based on a non-immunoglobulin scaffold, provide high imaging contrast shortly after injection. The aim of this study was to evaluate feasibility of PET imaging of HER3 expression using (68)Ga-labeled affibody molecules. The anti-HER3 affibody molecule HEHEHE-Z08698-NOTA was successfully labelled with (68)Ga with high yield, purity and stability. The agent bound specifically to HER3-expressing cancer cells in vitro and in vivo. At 3 h pi, uptake of (68)Ga-HEHEHE-Z08698-NOTA was significantly higher in xenografts with high HER3 expression (BT474, BxPC-3) than in xenografts with low HER3 expression (A431). In xenografts with high expression, tumour-to-blood ratios were >20, tumour-to-muscle >15, and tumour-to-bone >7. HER3-positive xenografts were visualised using microPET 3 h pi. In conclusion, PET imaging of HER3 expression is feasible using (68)Ga-HEHEHE-Z08698-NOTA shortly after administration.
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Affiliation(s)
- Maria Rosestedt
- Preclinical PET Platform, Uppsala University, Uppsala, Sweden
| | - Ken G Andersson
- Division of Protein Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Bogdan Mitran
- Preclinical PET Platform, Uppsala University, Uppsala, Sweden
| | - Vladimir Tolmachev
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - John Löfblom
- Division of Protein Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Anna Orlova
- Preclinical PET Platform, Uppsala University, Uppsala, Sweden
| | - Stefan Ståhl
- Division of Protein Technology, KTH Royal Institute of Technology, Stockholm, Sweden
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