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Distinctive detection of insulinoma using [ 18F]FB(ePEG12)12-exendin-4 PET/CT. Sci Rep 2021; 11:15014. [PMID: 34294854 PMCID: PMC8298522 DOI: 10.1038/s41598-021-94595-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 07/14/2021] [Indexed: 12/19/2022] Open
Abstract
Specifying the exact localization of insulinoma remains challenging due to the lack of insulinoma-specific imaging methods. Recently, glucagon-like peptide-1 receptor (GLP-1R)-targeted imaging, especially positron emission tomography (PET), has emerged. Although various radiolabeled GLP-1R agonist exendin-4-based probes with chemical modifications for PET imaging have been investigated, an optimal candidate probe and its scanning protocol remain a necessity. Thus, we investigated the utility of a novel exendin-4-based probe conjugated with polyethylene glycol (PEG) for [18F]FB(ePEG12)12-exendin-4 PET imaging for insulinoma detection. We utilized [18F]FB(ePEG12)12-exendin-4 PET/CT to visualize mouse tumor models, which were generated using rat insulinoma cell xenografts. The probe demonstrated high uptake value on the tumor as 37.1 ± 0.4%ID/g, with rapid kidney clearance. Additionally, we used Pdx1-Cre;Trp53R172H;Rbf/f mice, which developed endogenous insulinoma and glucagonoma, since they enabled differential imaging evaluation of our probe in functional pancreatic neuroendocrine neoplasms. In this model, our [18F]FB(ePEG12)12-exendin-4 PET/CT yielded favorable sensitivity and specificity for insulinoma detection. Sensitivity: 30-min post-injection 66.7%, 60-min post-injection 83.3%, combined 100% and specificity: 30-min post-injection 100%, 60-min post-injection 100%, combined 100%, which was corroborated by the results of in vitro time-based analysis of internalized probe accumulation. Accordingly, [18F]FB(ePEG12)12-exendin-4 is a promising PET imaging probe for visualizing insulinoma.
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Mall S, Yusufi N, Wagner R, Klar R, Bianchi H, Steiger K, Straub M, Audehm S, Laitinen I, Aichler M, Peschel C, Ziegler S, Mustafa M, Schwaiger M, D'Alessandria C, Krackhardt AM. Immuno-PET Imaging of Engineered Human T Cells in Tumors. Cancer Res 2016; 76:4113-23. [PMID: 27354381 DOI: 10.1158/0008-5472.can-15-2784] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 03/13/2016] [Indexed: 11/16/2022]
Abstract
Sensitive in vivo imaging technologies applicable to the clinical setting are still lacking for adoptive T-cell-based immunotherapies, an important gap to fill if mechanisms of tumor rejection or escape are to be understood. Here, we propose a highly sensitive imaging technology to track human TCR-transgenic T cells in vivo by directly targeting the murinized constant TCR beta domain (TCRmu) with a zirconium-89 ((89)Zr)-labeled anti-TCRmu-F(ab')2 fragment. Binding of the labeled or unlabeled F(ab')2 fragment did not impair functionality of transgenic T cells in vitro and in vivo Using a murine xenograft model of human myeloid sarcoma, we monitored by Immuno-PET imaging human central memory T cells (TCM), which were transgenic for a myeloid peroxidase (MPO)-specific TCR. Diverse T-cell distribution patterns were detected by PET/CT imaging, depending on the tumor size and rejection phase. Results were confirmed by IHC and semiquantitative evaluation of T-cell infiltration within the tumor corresponding to the PET/CT images. Overall, these findings offer a preclinical proof of concept for an imaging approach that is readily tractable for clinical translation. Cancer Res; 76(14); 4113-23. ©2016 AACR.
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Affiliation(s)
- Sabine Mall
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Nahid Yusufi
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany
| | - Ricarda Wagner
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Richard Klar
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Henrique Bianchi
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Katja Steiger
- Institut für Allgemeine Pathologie und Pathologische Anatomie, Technische Universität München, Munich, Germany
| | - Melanie Straub
- Institut für Allgemeine Pathologie und Pathologische Anatomie, Technische Universität München, Munich, Germany
| | - Stefan Audehm
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Iina Laitinen
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany
| | - Michaela Aichler
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Munich, Germany
| | - Christian Peschel
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. German Cancer Consortium (DKTK), Munich, Germany
| | - Sibylle Ziegler
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany
| | - Mona Mustafa
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany
| | - Markus Schwaiger
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany. German Cancer Consortium (DKTK), Munich, Germany
| | - Calogero D'Alessandria
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Munich, Germany
| | - Angela M Krackhardt
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. German Cancer Consortium (DKTK), Munich, Germany. Clinical Cooperation Group Antigen Specific T-Cell Therapy, Helmholtz Zentrum München, Munich, Germany.
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Milillo T, Hard R, Yatzor B, Miller ME, Gardella J. Image fusion combining SEM and ToF-SIMS images. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5719] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Robert Hard
- Department of Anatomy and Pathology; University at Buffalo SUNY; Buffalo NY USA
| | - Brett Yatzor
- Department of Anatomy and Pathology; University at Buffalo SUNY; Buffalo NY USA
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Abstract
Recent developments and improvements of multimodal imaging methods for use in animal research have substantially strengthened the options of in vivo visualization of cancer-related processes over time. Moreover, technological developments in probe synthesis and labelling have resulted in imaging probes with the potential for basic research, as well as for translational and clinical applications. In addition, more sophisticated cancer models are available to address cancer-related research questions. This Review gives an overview of developments in these three fields, with a focus on imaging approaches in animal cancer models and how these can help the translation of new therapies into the clinic.
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Affiliation(s)
- Marion de Jong
- Departments of Nuclear Medicine and Radiology, Erasmus MC Rotterdam, Room Na-610, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Jeroen Essers
- Departments of Genetics (Cancer Genomics Centre), Radiation Oncology and Vascular Surgery, Erasmus MC Rotterdam, P.O Box 2040, 3000CA Rotterdam, The Netherlands
| | - Wytske M van Weerden
- Department of Urology, Erasmus MC Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
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Fraedrich K, Schrader J, Ittrich H, Keller G, Gontarewicz A, Matzat V, Kromminga A, Pace A, Moll J, Bläker M, Lohse AW, Hörsch D, Brümmendorf TH, Benten D. Targeting aurora kinases with danusertib (PHA-739358) inhibits growth of liver metastases from gastroenteropancreatic neuroendocrine tumors in an orthotopic xenograft model. Clin Cancer Res 2012; 18:4621-32. [PMID: 22753592 DOI: 10.1158/1078-0432.ccr-11-2968] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Aurora kinases play a crucial role in cell-cycle control. Uncontrolled expression of aurora kinases causes aneuploidy and tumor growth. As conservative treatment options for advanced gastroenteropancreatic neuroendocrine tumors (GEP-NET) are disappointing, aurora kinases may be an interesting target for novel therapeutic strategies. EXPERIMENTAL DESIGN Human GEP-NETs were tested for aurora kinase expression. The efficacy of the new aurora kinase inhibitor danusertib was evaluated in two human GEP-NET cell lines (BON1 and QGP) in vitro and in vivo. RESULTS The majority of ten insulinomas and all 33 nonfunctional pancreatic or midgut GEP-NETs expressed aurora A despite a mostly high degree of cell differentiation. Both human GEP-NET cell lines expressed aurora kinase A and B, and high Ser10 phosphorylation of histone H3 revealed increased aurora B activity. Remarkably, danusertib led to cell-cycle arrest and completely inhibited cell proliferation of the GEP-NET cells in vitro. Decreased phosphorylation of histone H3 indicated effective aurora B inhibition. In a subcutaneous murine xenograft model, danusertib significantly reduced tumor growth in vivo compared with controls or mice treated with streptozotocine/5-fluorouracil. As a consequence, decreased levels of tumor marker chromogranin A were found in mouse serum samples. In a newly developed orthotopic model for GEP-NET liver metastases by intrasplenic tumor cell transplantation, dynamic MRI proved significant growth inhibition of BON1- and QGP-derived liver metastases. CONCLUSIONS These results show that danusertib may impose a new therapeutic strategy for aurora kinase expressing metastasized GEP-NETs.
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Affiliation(s)
- Katharina Fraedrich
- I. Medizinische Klinik, Diagnostische und Interventionelle Radiologie, II. Medizinische Klinik, Onkologisches Zentrum, Universitätsklinikum Hamburg-Eppendorf; Labor Lademannbogen, Hamburg, Germany
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Servais EL, Colovos C, Bograd AJ, White J, Sadelain M, Adusumilli PS. Animal models and molecular imaging tools to investigate lymph node metastases. J Mol Med (Berl) 2011; 89:753-69. [PMID: 21556810 DOI: 10.1007/s00109-011-0764-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 03/07/2011] [Accepted: 04/08/2011] [Indexed: 12/15/2022]
Abstract
Lymph node metastasis is a strong predictor of poor outcome in cancer patients. Animal studies of lymph node metastasis are constrained by difficulties in the establishment of appropriate animal models, limitations in the noninvasive monitoring of lymph node metastasis progression, and challenges in the pathologic confirmation of lymph node metastases. In this comprehensive review, we summarize available preclinical animal cancer models for noninvasive imaging and identification of lymph node metastases of non-hematogenous cancers. Furthermore, we discuss the strengths and weaknesses of common noninvasive imaging modalities used to identify tumor-bearing lymph nodes and provide guidelines for their pathological confirmation.
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Affiliation(s)
- Elliot L Servais
- Division of Thoracic Surgery, Memorial Sloan-Kettering Cancer Center, NY 10065, USA
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Small animal tumour imaging with MRI and the ECAT EXACT scanner: application of partial volume correction and comparison with microPET data. Nucl Med Commun 2010; 31:294-300. [PMID: 20023592 DOI: 10.1097/mnm.0b013e328334fc2a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Partial volume effects caused by limited spatial resolution of conventional positron emission tomography (PET) scanners result in an underestimation of the activity concentration in small tumours. The aim of the study was to evaluate the feasibility of small animal tumour imaging with the clinical PET scanner ECAT EXACT after partial volume correction based on MRI calculations. The same tumour model was examined additionally with the small animal PET system, microPET focus 120. METHODS Before the ECAT EXACT studies recovery coefficients for different sphere volumes were generated with phantom experiments. For the following in-vivo study DS-sarcoma cells were implanted on both hind foot dorsum of male Sprague-Dawley rats. In-vivo tumour volume calculations were done with the high-resolution MRI system, Magnetom Vision Experimental. Dynamic F-fluorodeoxyglucose (FDG) PET was performed with the scanner ECAT EXACT (5 MBq intravenous, two-dimensional mode, n = 16 tumours) or with the microPET focus 120 (20 MBq intravenous, two-dimensional mode, n = 10 tumours). The animals were then killed, the tumours rapidly explanted, weighed and homogenized. The concentration of F-FDG was measured with a gamma counter and decay corrected; the ex-vivo F-FDG concentration was compared with the mean tumour activity concentration of the PET data. RESULTS Using the ECAT EXACT mean underestimation of actual tumour F-FDG concentration was 35.4%, for partial volume-corrected data this error decreased to 1.7%. In addition, after partial volume correction congruence and linear correlation between the regions of interest-based activity concentration and ex-vivo measurements were excellent (r = 0.98). These results were quite similar to the microPET experiments without partial volume correction: r = 0.99. CONCLUSION These data indicate that partial volume correction might allow use of the clinical PET system, ECAT EXACT, for the metabolic assessment of small animal tumours >/=10 mm with sufficient accuracy if no dedicated animal PET is available.
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