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Liggieri F, Chiodaroli E, Pellegrini M, Puuvuori E, Sigfridsson J, Velikyan I, Chiumello D, Ball L, Pelosi P, Stramaglia S, Antoni G, Eriksson O, Perchiazzi G. Regional distribution of mechanical strain and macrophage-associated lung inflammation after ventilator-induced lung injury: an experimental study. Intensive Care Med Exp 2024; 12:77. [PMID: 39225817 PMCID: PMC11371987 DOI: 10.1186/s40635-024-00663-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 08/23/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Alveolar macrophages activation to the pro-inflammatory phenotype M1 is pivotal in the pathophysiology of Ventilator-Induced Lung Injury (VILI). Increased lung strain is a known determinant of VILI, but a direct correspondence between regional lung strain and macrophagic activation remains unestablished. [68Ga]Ga-DOTA-TATE is a Positron Emission Tomography (PET) radiopharmaceutical with a high affinity for somatostatin receptor subtype 2 (SSTR2), which is overexpressed by pro-inflammatory-activated macrophages. Aim of the study was to determine, in a porcine model of VILI, whether mechanical strain correlates topographically with distribution of activated macrophages detected by [68Ga]Ga-DOTA-TATE uptake. METHODS Seven anesthetized pigs underwent VILI, while three served as control. Lung CT scans were acquired at incremental tidal volumes, simultaneously recording lung mechanics. [68Ga]Ga-DOTA-TATE was administered, followed by dynamic PET scans. Custom MatLab scripts generated voxel-by-voxel gas volume and strain maps from CT slices at para-diaphragmatic (Para-D) and mid-thoracic (Mid-T) levels. Analysis of regional Voxel-associated Normal Strain (VoStrain) and [68Ga]Ga-DOTA-TATE uptake was performed and a measure of the statistical correlation between these two variables was quantified using the linear mutual information (LMI) method. RESULTS Compared to controls, the VILI group exhibited statistically significant higher VoStrain and Standardized Uptake Value Ratios (SUVR) both at Para-D and Mid-T levels. Both VoStrain and SUVR increased along the gravitational axis with an increment described by statistically different regression lines between VILI and healthy controls and reaching the peak in the dependent regions of the lung (for strain in VILI vs. control was at Para-D: 760 ± 210 vs. 449 ± 106; at Mid-T level 497 ± 373 vs. 193 ± 160; for SUVR, in VILI vs. control was at Para-D: 2.2 ± 1.3 vs. 1.3 ± 0.1; at Mid-T level 1.3 ± 1.0 vs. 0.6 ± 0.03). LMI in both Para-D and Mid-T was statistically significantly higher in VILI than in controls. CONCLUSIONS In this porcine model of VILI, we found a topographical correlation between lung strain and [68Ga]Ga-DOTA-TATE uptake at voxel level, suggesting that mechanical alteration and specific activation of inflammatory cells are strongly linked in VILI. This study represents the first voxel-by-voxel examination of this relationship in a multi-modal imaging analysis.
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Affiliation(s)
- Francesco Liggieri
- The Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska Sjukhuset-Ing. 40, Tr. 3, 75185, Uppsala, Sweden
- Dipartimento di Scienze Diagnostiche e Chirurgiche Integrate, Università di Genova, Genoa, Italy
| | - Elena Chiodaroli
- The Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska Sjukhuset-Ing. 40, Tr. 3, 75185, Uppsala, Sweden
- Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital, Milan, Italy
| | - Mariangela Pellegrini
- The Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska Sjukhuset-Ing. 40, Tr. 3, 75185, Uppsala, Sweden
- Department of Anesthesia and Intensive Care Medicine, Uppsala University Hospital, Uppsala, Sweden
| | - Emmi Puuvuori
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Jonathan Sigfridsson
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
| | - Irina Velikyan
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Davide Chiumello
- Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital, Milan, Italy
- Department of Health Sciences, University of Milan, Milan, Italy
- Coordinated Research Center on Respiratory Failure, University of Milan, Milan, Italy
| | - Lorenzo Ball
- Dipartimento di Scienze Diagnostiche e Chirurgiche Integrate, Università di Genova, Genoa, Italy
| | - Paolo Pelosi
- Dipartimento di Scienze Diagnostiche e Chirurgiche Integrate, Università di Genova, Genoa, Italy
| | - Sebastiano Stramaglia
- Department of Physics, National Institute for Nuclear Physics, University of Bari Aldo Moro, Bari, Italy
| | - Gunnar Antoni
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
| | - Olof Eriksson
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Gaetano Perchiazzi
- The Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska Sjukhuset-Ing. 40, Tr. 3, 75185, Uppsala, Sweden.
- Department of Anesthesia and Intensive Care Medicine, Uppsala University Hospital, Uppsala, Sweden.
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Noversa de Sousa R, Tascilar K, Corte G, Atzinger A, Minopoulou I, Ohrndorf S, Waldner M, Schmidkonz C, Kuwert T, Knieling F, Kleyer A, Ramming A, Schett G, Simon D, Fagni F. Metabolic and molecular imaging in inflammatory arthritis. RMD Open 2024; 10:e003880. [PMID: 38341194 PMCID: PMC10862311 DOI: 10.1136/rmdopen-2023-003880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
It is known that metabolic shifts and tissue remodelling precede the development of visible inflammation and structural organ damage in inflammatory rheumatic diseases such as the inflammatory arthritides. As such, visualising and measuring metabolic tissue activity could be useful to identify biomarkers of disease activity already in a very early phase. Recent advances in imaging have led to the development of so-called 'metabolic imaging' tools that can detect these changes in metabolism in an increasingly accurate manner and non-invasively.Nuclear imaging techniques such as 18F-D-glucose and fibroblast activation protein inhibitor-labelled positron emission tomography are increasingly used and have yielded impressing results in the visualisation (including whole-body staging) of inflammatory changes in both early and established arthritis. Furthermore, optical imaging-based bedside techniques such as multispectral optoacoustic tomography and fluorescence optical imaging are advancing our understanding of arthritis by identifying intra-articular metabolic changes that correlate with the onset of inflammation with high precision and without the need of ionising radiation.Metabolic imaging holds great potential for improving the management of patients with inflammatory arthritis by contributing to early disease interception and improving diagnostic accuracy, thereby paving the way for a more personalised approach to therapy strategies including preventive strategies. In this narrative review, we discuss state-of-the-art metabolic imaging methods used in the assessment of arthritis and inflammation, and we advocate for more extensive research endeavours to elucidate their full field of application in rheumatology.
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Affiliation(s)
- Rita Noversa de Sousa
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Serviço de Medicina Interna, Hospital Pedro Hispano, Matosinhos, Portugal
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Koray Tascilar
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Giulia Corte
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Armin Atzinger
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Ioanna Minopoulou
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Sarah Ohrndorf
- Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Maximilian Waldner
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Christian Schmidkonz
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Institute for Medical Engineering, Ostbayerische Technische Hochschule Amberg-Weiden, Amberg, Germany
| | - Torsten Kuwert
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Ferdinand Knieling
- Department of Pediatrics and Adolescent Medicine, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Arnd Kleyer
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Andreas Ramming
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Georg Schett
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - David Simon
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Filippo Fagni
- Department of Internal Medicine 3, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
- Deutsches Zentrum fuer Immuntherapie (DZI), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
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Mannes PZ, Barnes CE, Latoche JD, Day KE, Nedrow JR, Lee JS, Tavakoli S. 2-deoxy-2-[ 18F]fluoro-D-glucose Positron Emission Tomography to Monitor Lung Inflammation and Therapeutic Response to Dexamethasone in a Murine Model of Acute Lung Injury. Mol Imaging Biol 2023; 25:681-691. [PMID: 36941514 PMCID: PMC10027262 DOI: 10.1007/s11307-023-01813-w] [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: 10/25/2022] [Revised: 01/30/2023] [Accepted: 03/07/2023] [Indexed: 03/23/2023]
Abstract
PURPOSE To image inflammation and monitor therapeutic response to anti-inflammatory intervention using 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) positron emission tomography (PET) in a preclinical model of acute lung injury (ALI). PROCEDURES Mice were intratracheally administered lipopolysaccharide (LPS, 2.5 mg/kg) to induce ALI or phosphate-buffered saline as the vehicle control. A subset of mice in the ALI group received two intraperitoneal doses of dexamethasone 1 and 24 h after LPS. [18F]FDG PET/CT was performed 2 days after the induction of ALI. [18F]FDG uptake in the lungs was quantified by PET (%ID/mLmean and standardized uptake value (SUVmean)) and ex vivo γ-counting (%ID/g). The severity of lung inflammation was determined by quantifying the protein level of inflammatory cytokines/chemokines and the activity of neutrophil elastase and glycolytic enzymes. In separate groups of mice, flow cytometry was performed to estimate the contribution of individual immune cell types to the total pulmonary inflammatory cell burden under different treatment conditions. RESULTS Lung uptake of [18F]FDG was significantly increased during LPS-induced ALI, and a decreased [18F]FDG uptake was observed following dexamethasone treatment to an intermediate level between that of LPS-treated and control mice. Protein expression of inflammatory biomarkers and the activity of neutrophil elastase and glycolytic enzymes were increased in the lungs of LPS-treated mice versus those of control mice, and correlated with [18F]FDG uptake. Furthermore, dexamethasone-induced decreases in cytokine/chemokine protein levels and enzyme activities correlated with [18F]FDG uptake. Neutrophils were the most abundant cells in LPS-induced ALI, and the pattern of total cell burden during ALI with or without dexamethasone therapy mirrored that of [18F]FDG uptake. CONCLUSIONS [18F]FDG PET noninvasively detects lung inflammation in ALI and its response to anti-inflammatory therapy in a preclinical model. However, high [18F]FDG uptake by bone, brown fat, and myocardium remains a technical limitation for quantification of [18F]FDG in the lungs.
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Affiliation(s)
- Philip Z Mannes
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA
- Medical Scientist Training Program, University of Pittsburgh, Pittsburgh, PA, USA
| | - Clayton E Barnes
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joseph D Latoche
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kathryn E Day
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jessie R Nedrow
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Janet S Lee
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sina Tavakoli
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
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Xia W, Singh N, Goel S, Shi S. Molecular Imaging of Innate Immunity and Immunotherapy. Adv Drug Deliv Rev 2023; 198:114865. [PMID: 37182699 DOI: 10.1016/j.addr.2023.114865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/17/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023]
Abstract
The innate immune system plays a key role as the first line of defense in various human diseases including cancer, cardiovascular and inflammatory diseases. In contrast to tissue biopsies and blood biopsies, in vivo imaging of the innate immune system can provide whole body measurements of immune cell location and function and changes in response to disease progression and therapy. Rationally developed molecular imaging strategies can be used in evaluating the status and spatio-temporal distributions of the innate immune cells in near real-time, mapping the biodistribution of novel innate immunotherapies, monitoring their efficacy and potential toxicities, and eventually for stratifying patients that are likely to benefit from these immunotherapies. In this review, we will highlight the current state-of-the-art in noninvasive imaging techniques for preclinical imaging of the innate immune system particularly focusing on cell trafficking, biodistribution, as well as pharmacokinetics and dynamics of promising immunotherapies in cancer and other diseases; discuss the unmet needs and current challenges in integrating imaging modalities and immunology and suggest potential solutions to overcome these barriers.
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Affiliation(s)
- Wenxi Xia
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States
| | - Neetu Singh
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States
| | - Shreya Goel
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States; Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84112, United States
| | - Sixiang Shi
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States; Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84112, United States.
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5
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Vorster M. Gallium-68 Labelled Radiopharmaceuticals for Imaging Inflammatory Disorders. Semin Nucl Med 2023; 53:199-212. [PMID: 36270829 DOI: 10.1053/j.semnuclmed.2022.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 12/24/2022]
Abstract
Inflammation is an important component of several chronic and debilitating diseases that result in significant morbidity and mortality. This is best evidenced within the cardiovascular system where it may manifest as atherosclerosis or myocarditis, and at the extreme end of the spectrum as myocardial infarction, ventricular remodeling, or cardiac failure. Early non-invasive detection and monitoring of inflammation in these and other settings may better guide patient management with resultant improved outcomes. Key role players in inflammation pathophysiology include chemokines, macrophages, neutrophils, fibroblasts, integrins, and reactive oxygen species, amongst others. Examples of receptor expression and over-expression include somatostatin receptors, CXCR4-, folate-, mannose-, TSPO- receptors and secretion of various vascular adhesion molecules (such as VCAM and ICAM). Gallium-68-based PET offers imaging possibilities for nearly all the major pathophysiological role players in inflammation, with mounting recent interest in macrophage differentiation, various forms of receptor expression and secretion of chemokines and vascular adhesion molecules. The advantages in terms of logistics and costs of having generator-produced PET probes available is well known, and a 68Ga-based tracer provides easily translatable theranostic possibilities to especially Lu-177. Some of the more versatile and better validated Ga-68-based inflammation probes include 68Ga-DOTA-TATE/NOC/TOC, 68Ga-NOTA-RGD, 68Ga-CXCR4, 68Ga-citrate and 68Ga-FAPI.
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Affiliation(s)
- Mariza Vorster
- Nuclear Medicine, Department of Nuclear Medicine at Inkosi Albert Luthuli Hospital, University of KwaZulu-Natal, Berea, KwaZulu-Natal, South Africa.
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Puuvuori E, Chiodaroli E, Estrada S, Cheung P, Lubenow N, Sigfridsson J, Romelin H, Ingvast S, Elgland M, Liggieri F, Korsgren O, Perchiazzi G, Eriksson O, Antoni G. PET Imaging of Neutrophil Elastase with 11C-GW457427 in Acute Respiratory Distress Syndrome in Pigs. J Nucl Med 2023; 64:423-429. [PMID: 36109184 PMCID: PMC10071803 DOI: 10.2967/jnumed.122.264306] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 09/01/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Today, there is a lack of clinically available imaging techniques to detect and quantify specific immune cell populations. Neutrophils are one of the first immune cells at the site of inflammation, and they secrete the serine protease neutrophil elastase (NE), which is crucial in the fight against pathogens. However, the prolonged lifespan of neutrophils increases the risk that patients will develop severe complications, such as acute respiratory distress syndrome (ARDS). Here, we evaluated the novel radiolabeled NE inhibitor 11C-GW457427 in a pig model of ARDS, for detection and quantification of neutrophil activity in the lungs. Methods: ARDS was induced by intravenous administration of oleic acid to 5 farm pigs, and 4 were considered healthy controls. The severity of ARDS was monitored by clinical parameters of lung function and plasma biomarkers. Each pig was studied with 11C-GW457427 and PET/CT, before and after pretreatment with the NE inhibitor GW311616 to determine in vivo binding specificity. PET image data were analyzed as SUVs and correlated with immunohistochemical staining for NE in biopsies. Results: The binding of 11C-GW457427 was increased in pig lungs with induced ARDS (median SUVmean, 1.91; interquartile range [IQR], 1.67-2.55) compared with healthy control pigs (P < 0.05 and P = 0.03, respectively; median SUVmean, 1.04; IQR, 0.66-1.47). The binding was especially strong in lung regions with high levels of NE and ongoing inflammation, as verified by immunohistochemistry. The binding was successfully blocked by pretreatment of an NE inhibitor drug, which demonstrated the in vivo specificity of 11C-GW457427 (P < 0.05 and P = 0.04, respectively; median SUVmean, 0.60; IQR, 0.58-0.77). The binding in neutrophil-rich tissues such as bone marrow (P < 0.05 and P = 0.04, respectively; baseline median SUVmean, 5.01; IQR, 4.48-5.49; block median SUVmean, 1.57; IQR, 0.95-1.85) and spleen (median SUVmean, 2.14; IQR, 1.19-2.36) was also high in all pigs. Conclusion: 11C-GW457427 binds to NE in a porcine model of oleic acid-induced lung inflammation in vivo, with a specific increase in regional lung, bone marrow, and spleen SUV. 11C-GW457427 is a promising tool for localizing, tracking, and quantifying neutrophil-facilitated inflammation in clinical diagnostics and drug development.
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Affiliation(s)
- Emmi Puuvuori
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Elena Chiodaroli
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala Sweden
| | - Sergio Estrada
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Pierre Cheung
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Norbert Lubenow
- Department of Immunology, Genetics, and Pathology, Uppsala University, Uppsala, Sweden; and
| | - Jonathan Sigfridsson
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
| | - Hampus Romelin
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
| | - Sofie Ingvast
- Department of Immunology, Genetics, and Pathology, Uppsala University, Uppsala, Sweden; and
| | - Mathias Elgland
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
| | - Francesco Liggieri
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala Sweden
| | - Olle Korsgren
- Department of Immunology, Genetics, and Pathology, Uppsala University, Uppsala, Sweden; and
| | - Gaetano Perchiazzi
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala Sweden
| | - Olof Eriksson
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden;
| | - Gunnar Antoni
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden;
- PET Center, Center for Medical Imaging, Uppsala University Hospital, Uppsala, Sweden
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7
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Velikyan I, Bossart M, Haack T, Laitinen I, Estrada S, Johansson L, Pierrou S, Wagner M, Eriksson O. Imaging of the Glucose-Dependent Insulinotropic Polypeptide Receptor Using a Novel Radiolabeled Peptide Rationally Designed Based on Endogenous GIP and Synthetic Exendin-4 Sequences. Pharmaceuticals (Basel) 2022; 16:ph16010061. [PMID: 36678558 PMCID: PMC9864903 DOI: 10.3390/ph16010061] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/15/2022] [Accepted: 12/23/2022] [Indexed: 01/03/2023] Open
Abstract
Imaging and radiotherapy targeting the glucose-dependent insulinotropic polypeptide receptor (GIPR) could potentially benefit the management of neuroendocrine neoplasms (NENs), complementing clinically established radiopharmaceuticals. The aim of this study was to evaluate a GIPR-targeting positron emission tomography (PET) radioligand with receptor-specific binding, fast blood clearance, and low liver background uptake. The peptide DOTA-bioconjugate, C803-GIP, was developed based on the sequence of the endogenous GIP(1-30) and synthetic exendin-4 peptides with selective amino acid mutations to combine their specificity for the GIPR and in vivo stability, respectively. The 68Ga-labeled bioconjugate was evaluated in vitro in terms of binding affinity, specificity, and internalization in HEK293 cells transfected with the human GIPR, GLP1, or GCG receptors and in sections of human insulinoma and NENs. In vivo binding specificity, biodistribution, and tissue background were investigated in mice bearing huGIPR-HEK293 xenografts and in a pig. Ex vivo organ distribution, pharmacokinetics, and dosimetry were studied in normal rats. [68Ga]Ga-C803-GIP was stable and demonstrated a high affinity to the huGIPR-HEK293 cells. Binding specificity was demonstrated in vitro in frozen sections of NENs and huGIPR-HEK293 cells. No specific uptake was observed in the negative controls of huGLP1R and huGCGR cells. A novel rationally designed PET radioligand, [68Ga]Ga-C803-GIP, demonstrated promising binding characteristics and specificity towards the GIPR.
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Affiliation(s)
- Irina Velikyan
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, SE-751 83 Uppsala, Sweden
- PET Centre, Centre for Medical Imaging, Uppsala University Hospital, SE-751 85 Uppsala, Sweden
- Correspondence: (I.V.); (M.B.); Tel.: +46-(0)70-4834137 (I.V.)
| | - Martin Bossart
- R&D Research Platform, Integrated Drug Discovery, Sanofi, 65929 Frankfurt, Germany
- Correspondence: (I.V.); (M.B.); Tel.: +46-(0)70-4834137 (I.V.)
| | - Torsten Haack
- R&D Research Platform, Integrated Drug Discovery, Sanofi, 65929 Frankfurt, Germany
| | | | - Sergio Estrada
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, SE-751 83 Uppsala, Sweden
| | | | | | - Michael Wagner
- R&D Research Platform, Integrated Drug Discovery, Sanofi, 65929 Frankfurt, Germany
| | - Olof Eriksson
- Science for Life Laboratory, Department of Medicinal Chemistry, Uppsala University, SE-751 83 Uppsala, Sweden
- Antaros Medical AB, SE-431 53 Mölndal, Sweden
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