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Liu AB, Liu J, Wang S, Ma L, Zhang JF. Biological role and expression of translationally controlled tumor protein (TCTP) in tumorigenesis and development and its potential for targeted tumor therapy. Cancer Cell Int 2024; 24:198. [PMID: 38835077 DOI: 10.1186/s12935-024-03355-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 05/03/2024] [Indexed: 06/06/2024] Open
Abstract
Translationally controlled tumor protein (TCTP), also known as histamine-releasing factor (HRF) or fortilin, is a highly conserved protein found in various species. To date, multiple studies have demonstrated the crucial role of TCTP in a wide range of cellular pathophysiological processes, including cell proliferation and survival, cell cycle regulation, cell death, as well as cell migration and movement, all of which are major pathogenic mechanisms of tumorigenesis and development. This review aims to provide an in-depth analysis of the functional role of TCTP in tumor initiation and progression, with a particular focus on cell proliferation, cell death, and cell migration. It will highlight the expression and pathological implications of TCTP in various tumor types, summarizing the current prevailing therapeutic strategies that target TCTP.
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Affiliation(s)
- An-Bu Liu
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, 750000, Ningxia, China
| | - Jia Liu
- Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan, 750000, Ningxia, China
| | - Sheng Wang
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, 750000, Ningxia, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, 750000, Ningxia, China
| | - Lei Ma
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, 750000, Ningxia, China.
| | - Jun-Fei Zhang
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, 750000, Ningxia, China.
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Zhang Y, Ouyang M, Wang H, Zhang B, Guang W, Liu R, Li X, Shih TC, Li Z, Cao J, Meng Q, Su Z, Ye J, Liu F, Hong A, Chen X. A cyclic peptide retards the proliferation of DU145 prostate cancer cells in vitro and in vivo through inhibition of FGFR2. MedComm (Beijing) 2021; 1:362-375. [PMID: 34766128 PMCID: PMC8491194 DOI: 10.1002/mco2.48] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/21/2020] [Accepted: 11/24/2020] [Indexed: 12/18/2022] Open
Abstract
In malignancies, fibroblast growth factor receptors (FGFRs) signaling is reinforced through overexpression of fibroblast growth factors (FGFs) or their receptors. FGFR2 has been proposed as a target for cancer therapy, because both the expression and activation of FGFR2 are boosted in various malignant carcinomas. Although several chemicals have been designed against FGFR2, they did not exhibit enough specificity and might bring potential accumulated toxicity. In this study, we developed an epitope peptide (P5) and its cyclic derivative (DcP5) based on the structure of FGF2 to limit the activation of FGFR2. The anticancer activities of P5 and DcP5 were examined in vitro and in vivo. Our results demonstrated that P5 significantly inhibited the cell proliferation in FGFR2‐dependent manner in DU145 cells and retarded tumor growth in DU145 xenograft model with negligible toxicity toward normal organs. Further investigations found that the Gln4 and Glu6 residues of P5 bind to FGFR2 to abolish its activation. Moreover, we developed the P5 cyclic derivative, DcP5, which achieved reinforced stability and anticancer activity in vivo. Our findings suggest P5 and its cyclic derivative DcP5 as potential candidates for anticancer therapy.
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Affiliation(s)
- Yibo Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Man Ouyang
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Hailong Wang
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Bihui Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Wenhua Guang
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Ruiwu Liu
- Department of Biochemistry and Molecular Medicine University of California Davis Sacramento California
| | - Xiaocen Li
- Department of Biochemistry and Molecular Medicine University of California Davis Sacramento California
| | - Tsung-Chieh Shih
- Department of Biochemistry and Molecular Medicine University of California Davis Sacramento California
| | - Zhixin Li
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Jieqiong Cao
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Qiling Meng
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Zijian Su
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Jinshao Ye
- Guangdong Key Laboratory of Environmental Pollution and Health School of Environment Jinan University Guangzhou China
| | - Feng Liu
- China Nuclear Power Technology Research Institute Co Ltd Shenzhen China
| | - An Hong
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
| | - Xiaojia Chen
- Department of Cell Biology, College of Life Science and Technology, Jinan University National Engineering Research Center of Genetic Medicine Guangdong Provincial Key Laboratory of Bioengineering Medicine Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center Jinan University Guangzhou China
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Towards Optimized Bioavailability of 99mTc-Labeled Barbiturates for Non-invasive Imaging of Matrix Metalloproteinase Activity. Mol Imaging Biol 2021; 24:434-443. [PMID: 34750717 PMCID: PMC9085681 DOI: 10.1007/s11307-021-01668-z] [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: 07/21/2021] [Revised: 09/28/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022]
Abstract
Introduction
Dysregulated activity of matrix metalloproteinases (MMPs) drives a variety of pathophysiological conditions. Non-invasive imaging of MMP activity in vivo promises diagnostic and prognostic value. However, current targeting strategies by small molecules are typically limited with respect to the bioavailability of the labeled MMP binders in vivo. To this end, we here introduce and compare three chemical modifications of a recently developed barbiturate-based radiotracer with respect to bioavailability and potential to image MMP activity in vivo. Methods Barbiturate-based MMP inhibitors with an identical targeting unit but varying hydrophilicity were synthesized, labeled with technetium-99m, and evaluated in vitro and in vivo. Biodistribution and radiotracer elimination were determined in C57/BL6 mice by serial SPECT imaging. MMP activity was imaged in a MMP-positive subcutaneous xenograft model of human K1 papillary thyroid tumors. In vivo data were validated by scintillation counting, autoradiography, and MMP immunohistochemistry. Results We prepared three new 99mTc‐labeled MMP inhibitors, bearing either a glycine ([99mTc]MEA39), lysine ([99mTc]MEA61), or the ligand HYNIC with the ionic co-ligand TPPTS ([99mTc]MEA223) yielding gradually increasing hydrophilicity. [99mTc]MEA39 and [99mTc]MEA61 were rapidly eliminated via hepatobiliary pathways. In contrast, [99mTc]MEA223 showed delayed in vivo clearance and primary renal elimination. In a thyroid tumor xenograft model, only [99mTc]MEA223 exhibited a high tumor-to-blood ratio that could easily be delineated in SPECT images. Conclusion Introduction of HYNIC/TPPTS into the barbiturate lead structure ([99mTc]MEA223) results in delayed renal elimination and allows non-invasive MMP imaging with high signal-to-noise ratios in a papillary thyroid tumor xenograft model. Supplementary Information The online version contains supplementary material available at 10.1007/s11307-021-01668-z.
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Saw PE, Song EW. Phage display screening of therapeutic peptide for cancer targeting and therapy. Protein Cell 2019; 10:787-807. [PMID: 31140150 PMCID: PMC6834755 DOI: 10.1007/s13238-019-0639-7] [Citation(s) in RCA: 149] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/21/2019] [Indexed: 12/14/2022] Open
Abstract
Recently, phage display technology has been announced as the recipient of Nobel Prize in Chemistry 2018. Phage display technique allows high affinity target-binding peptides to be selected from a complex mixture pool of billions of displayed peptides on phage in a combinatorial library and could be further enriched through the biopanning process; proving to be a powerful technique in the screening of peptide with high affinity and selectivity. In this review, we will first discuss the modifications in phage display techniques used to isolate various cancer-specific ligands by in situ, in vitro, in vivo, and ex vivo screening methods. We will then discuss prominent examples of solid tumor targeting-peptides; namely peptide targeting tumor vasculature, tumor microenvironment (TME) and over-expressed receptors on cancer cells identified through phage display screening. We will also discuss the current challenges and future outlook for targeting peptide-based therapeutics in the clinics.
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Affiliation(s)
- Phei Er Saw
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Er-Wei Song
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
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A Promising Biocompatible Platform: Lipid-Based and Bio-Inspired Smart Drug Delivery Systems for Cancer Therapy. Int J Mol Sci 2018; 19:ijms19123859. [PMID: 30518027 PMCID: PMC6321581 DOI: 10.3390/ijms19123859] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 11/29/2018] [Accepted: 12/02/2018] [Indexed: 02/06/2023] Open
Abstract
Designing new drug delivery systems (DDSs) for safer cancer therapy during pre-clinical and clinical applications still constitutes a considerable challenge, despite advances made in related fields. Lipid-based drug delivery systems (LBDDSs) have emerged as biocompatible candidates that overcome many biological obstacles. In particular, a combination of the merits of lipid carriers and functional polymers has maximized drug delivery efficiency. Functionalization of LBDDSs enables the accumulation of anti-cancer drugs at target destinations, which means they are more effective at controlled drug release in tumor microenvironments (TMEs). This review highlights the various types of ligands used to achieve tumor-specific delivery and discusses the strategies used to achieve the effective release of drugs in TMEs and not into healthy tissues. Moreover, innovative recent designs of LBDDSs are also described. These smart systems offer great potential for more advanced cancer therapies that address the challenges posed in this research area.
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Kiugel M, Hellberg S, Käkelä M, Liljenbäck H, Saanijoki T, Li XG, Tuomela J, Knuuti J, Saraste A, Roivainen A. Evaluation of [ 68Ga]Ga-DOTA-TCTP-1 for the Detection of Metalloproteinase 2/9 Expression in Mouse Atherosclerotic Plaques. Molecules 2018; 23:molecules23123168. [PMID: 30513758 PMCID: PMC6321344 DOI: 10.3390/molecules23123168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 11/29/2018] [Indexed: 12/30/2022] Open
Abstract
Background: The expression of matrix metalloproteinases 2/9 (MMP-2/9) has been implicated in arterial remodeling and inflammation in atherosclerosis. We evaluated a gallium-68 labeled peptide for the detection of MMP-2/9 in atherosclerotic mouse aorta. Methods: We studied sixteen low-density lipoprotein receptor deficient mice (LDLR-/-ApoB100/100) kept on a Western-type diet. Distribution of intravenously-injected MMP-2/9-targeting peptide, [68Ga]Ga-DOTA-TCTP-1, was studied by combined positron emission tomography (PET) and contrast-enhanced computed tomography (CT). At 60 min post-injection, aortas were cut into cryosections for autoradiography analysis of tracer uptake, histology, and immunohistochemistry. Zymography was used to assess MMP-2/9 activation and pre-treatment with MMP-2/9 inhibitor to assess the specificity of tracer uptake. Results: Tracer uptake was not visible by in vivo PET/CT in the atherosclerotic aorta, but ex vivo autoradiography revealed 1.8 ± 0.34 times higher tracer uptake in atherosclerotic plaques than in normal vessel wall (p = 0.0029). Tracer uptake in plaques correlated strongly with the quantity of Mac-3-positive macrophages (R = 0.91, p < 0.001), but weakly with MMP-9 staining (R = 0.40, p = 0.099). Zymography showed MMP-2 activation in the aorta, and pre-treatment with MMP-2/9 inhibitor decreased tracer uptake by 55% (p = 0.0020). Conclusions: The MMP-2/9-targeting [68Ga]Ga-DOTA-TCTP-1 shows specific uptake in inflamed atherosclerotic lesions; however, a low target-to-background ratio precluded in vivo vascular imaging. Our results suggest, that the affinity of gelatinase imaging probes should be steered towards activated MMP-2, to reduce the interference of circulating enzymes on the target visualization in vivo.
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Affiliation(s)
- Max Kiugel
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
| | - Sanna Hellberg
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
| | - Meeri Käkelä
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
| | - Heidi Liljenbäck
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
- Turku Center for Disease Modeling, University of Turku, FI-20520 Turku, Finland.
| | - Tiina Saanijoki
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
| | - Xiang-Guo Li
- Turku PET Centre, Åbo Akademi University, FI-20520 Turku, Finland.
| | - Johanna Tuomela
- Department of Cell Biology and Anatomy, University of Turku, FI-20520 Turku, Finland.
| | - Juhani Knuuti
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
- Turku PET Centre, Turku University Hospital, FI-20520 Turku, Finland.
| | - Antti Saraste
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
- Turku PET Centre, Turku University Hospital, FI-20520 Turku, Finland.
- Heart Center, Turku University Hospital, FI-20520 Turku, Finland.
- Institute of Clinical Medicine, University of Turku, FI-20520 Turku, Finland.
| | - Anne Roivainen
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland.
- Turku Center for Disease Modeling, University of Turku, FI-20520 Turku, Finland.
- Turku PET Centre, Turku University Hospital, FI-20520 Turku, Finland.
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de Haas HJ, Narula J. Playing slot to hitting the jackpot in molecular imaging: On probability of uncovering subcellular pathogenesis vs achieving clinical applicability. J Nucl Cardiol 2018; 25:1124-1127. [PMID: 28353214 DOI: 10.1007/s12350-017-0850-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 12/27/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Hans J de Haas
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jagat Narula
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, 1190 Fifth Avenue, New York, NY, 10029, USA.
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Kiugel M, Kytö V, Saanijoki T, Liljenbäck H, Metsälä O, Ståhle M, Tuomela J, Li XG, Saukko P, Knuuti J, Roivainen A, Saraste A. Evaluation of 68Ga-labeled peptide tracer for detection of gelatinase expression after myocardial infarction in rat. J Nucl Cardiol 2018; 25:1114-1123. [PMID: 27914007 DOI: 10.1007/s12350-016-0744-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 11/11/2016] [Indexed: 12/26/2022]
Abstract
BACKGROUND Matrix metalloproteinases 2 and 9 (MMP-2/9) play a role in extracellular matrix remodeling after an ischemic myocardial injury. We evaluated 68Ga-DOTA-peptide targeting MMP-2/9 for the detection of gelatinase expression after myocardial infarction (MI) in rat. METHODS Rats were injected with 43 ± 7.7 MBq of 68Ga-DOTA-peptide targeting MMP-2/9 at 7 days (n = 7) or 4 weeks (n = 8) after permanent coronary ligation or sham operation (n = 5 at both time points) followed by positron emission tomography (PET). The left ventricle was cut in frozen sections for autoradiography and immunohistochemistry 30 minutes after tracer injection. RESULTS Immunohistochemical staining showed MMP-2 and MMP-9 expressing cells, CD31-positive endothelial cells, and CD68-positive macrophages in the infarcted myocardium. Autoradiography showed increased tracer uptake in the infarcted area both at 7 days and 4 weeks after MI (MI-to-remote area ratio 2.5 ± 0.46 and 3.1 ± 1.0, respectively). Tracer uptake in damaged tissue correlated with the amount of CD68-positive macrophages at 7 days after MI, and CD31-positive endothelial cells at 7 days and 4 weeks after MI. The tracer was rapidly metabolized, radioactivity in the blood exceeded that of the myocardium, and tracer accumulation in the heart was not detectable by in vivo PET. CONCLUSIONS 68Ga-DOTA-peptide targeting MMP-2/9 accumulates in the damaged rat myocardium after an ischemic injury, but tracer instability and slow clearance in vivo make it unsuitable for further evaluation.
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Affiliation(s)
- Max Kiugel
- Turku PET Centre, University of Turku, 20521, Turku, Finland
| | - Ville Kytö
- Heart Center, Turku University Hospital, Turku, Finland
- Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland
| | - Tiina Saanijoki
- Turku PET Centre, University of Turku, 20521, Turku, Finland
| | - Heidi Liljenbäck
- Turku PET Centre, University of Turku, 20521, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Olli Metsälä
- Turku PET Centre, University of Turku, 20521, Turku, Finland
| | - Mia Ståhle
- Turku PET Centre, University of Turku, 20521, Turku, Finland
| | - Johanna Tuomela
- Department of Cell Biology and Anatomy, University of Turku, Turku, Finland
| | - Xiang-Guo Li
- Turku PET Centre, University of Turku, 20521, Turku, Finland
- Turku PET Centre, Åbo Akademi University, Turku, Finland
| | - Pekka Saukko
- Department of Pathology and Forensic Medicine, University of Turku, Turku, Finland
| | - Juhani Knuuti
- Turku PET Centre, University of Turku, 20521, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Anne Roivainen
- Turku PET Centre, University of Turku, 20521, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Antti Saraste
- Turku PET Centre, University of Turku, 20521, Turku, Finland.
- Heart Center, Turku University Hospital, Turku, Finland.
- Institute of Clinical Medicine, University of Turku, Turku, Finland.
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Prospective of 68Ga Radionuclide Contribution to the Development of Imaging Agents for Infection and Inflammation. CONTRAST MEDIA & MOLECULAR IMAGING 2018. [PMID: 29531507 PMCID: PMC5817300 DOI: 10.1155/2018/9713691] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
During the last decade, the utilization of 68Ga for the development of imaging agents has increased considerably with the leading position in the oncology. The imaging of infection and inflammation is lagging despite strong unmet medical needs. This review presents the potential routes for the development of 68Ga-based agents for the imaging and quantification of infection and inflammation in various diseases and connection of the diagnosis to the treatment for the individualized patient management.
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Mousavizadeh A, Jabbari A, Akrami M, Bardania H. Cell targeting peptides as smart ligands for targeting of therapeutic or diagnostic agents: a systematic review. Colloids Surf B Biointerfaces 2017; 158:507-517. [PMID: 28738290 DOI: 10.1016/j.colsurfb.2017.07.012] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/30/2017] [Accepted: 07/05/2017] [Indexed: 12/13/2022]
Abstract
Cell targeting peptides (CTP) are small peptides which have high affinity and specificity to a cell or tissue targets. They are typically identified by using phage display and chemical synthetic peptide library methods. CTPs have attracted considerable attention as a new class of ligands to delivery specifically therapeutic and diagnostic agents, because of the fact they have several advantages including easy synthesis, smaller physical sizes, lower immunogenicity and cytotoxicity and their simple and better conjugation to nano-carriers and therapeutic or diagnostic agents compared to conventional antibodies. In this systematic review, we will focus on the basic concepts concerning the use of cell-targeting peptides (CTPs), following the approaches of selecting them from peptide libraries. We discuss several developed strategies for cell-specific delivery of different cargos by CTPs, which are designed for drug delivery and diagnostic applications.
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Affiliation(s)
- Ali Mousavizadeh
- Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Ali Jabbari
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Mohammad Akrami
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Bardania
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran.
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Lebel R, Lepage M. A comprehensive review on controls in molecular imaging: lessons from MMP-2 imaging. CONTRAST MEDIA & MOLECULAR IMAGING 2015; 9:187-210. [PMID: 24700747 DOI: 10.1002/cmmi.1555] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 06/11/2013] [Accepted: 06/19/2013] [Indexed: 12/31/2022]
Abstract
Metalloproteinases (MMPs), including MMP-2, play critical roles in tissue remodeling and are involved in a large array of pathologies, including cancer, arthritis and atherosclerosis. Their prognostic value warranted a large investment or resources in the development of noninvasive detection methods, based on probes for many current clinical and pre-clinical imaging modalities. However, the potential of imaging techniques is only matched by the complexity of the data they generate. This complexity must be properly assessed and accounted for in the early steps of probe design and testing in order to accurately determine the efficacy and efficiency of an imaging strategy. This review proposes basic rules for the evaluation of novel probes by addressing the specific case of MMP targeted probes.
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Affiliation(s)
- Réjean Lebel
- Centre d'imagerie moléculaire de Sherbrooke, Département de médecine nucléaire et radiobiologie, Université de Sherbrooke, Sherbrooke, QC, Canada
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Liu Q, Pan D, Cheng C, Zhang A, Ma C, Wang L, Zhang D, Liu H, Jiang H, Wang T, Xu Y, Yang R, Chen F, Yang M, Zuo C. Targeting of MMP2 activity in malignant tumors with a 68Ga-labeled gelatinase inhibitor cyclic peptide. Nucl Med Biol 2015; 42:939-44. [PMID: 26344861 DOI: 10.1016/j.nucmedbio.2015.07.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/30/2015] [Accepted: 07/31/2015] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Elevated levels of gelatinases (matrix metalloproteinases 2/9, i.e., MMP2 and MMP9) are associated with tumor progression, invasion and metastasis, so these enzymes are potential targets for tumor imaging. The peptide c(KAHWGFTLD)NH2 (herein, C6) is a selective gelatinase inhibitor. Cy5.5-C6 has been visualized in many tumor models in vivo. However, the sensitivity and penetrance of optical imaging are poor. It is well known that positron emission tomography (PET) has a high detection sensitivity and Gallium-68 ((68)Ga) is an optimal PET radioisotope. Thus, in the present study, we developed a novel ligand, (68)Ga-NOTA-C6, to image MMP2 activity in tumors. METHODS C6 was conjugated with the bifunctional chelator NOTA (1,4,7-triazacyclononanetriacetic acid) and labeled with (68)Ga. In vitro uptake and binding analyses were performed by using SKOV3 cell lines, coincubating with or without the MMP inhibitor doxycycline. The biodistribution and PET imaging were conducted on SKOV3 ovarian tumor models. MMP2 expression in tumors was analyzed by immunohistochemistry (IHC). RESULTS The non-decay corrected yield of (68)Ga-NOTA-C6 was 61.8%-63.3%. (68)Ga-NOTA-C6 was stable in both physiological saline and human serum. The uptake of (68)Ga-NOTA-C6 in SKOV3 cells increased with time, and could be blocked by doxycycline in a dose dependent manner. The results of biodistribution and PET imaging showed that high radioactivity concentrations of (68)Ga-NOTA-C6 occurred in tumors. The ratios of tumor to blood, muscle and ovary and oviduct at 30, 60 and 120min p.i. were 2.78±0.54, 3.86±0.65, 0.48±0.14, and 1.73±0.36, 10.31±3.12, 1.22±0.10, and 2.50±0.78, 7.03±1.85, 0.97±0.25, respectively. The tracer was excreted mainly through the renal system, as evidenced by high levels of radioactivity in the kidneys. These data support the possibility of using (68)Ga-NOTA-C6 in PET to visualize tumors that overexpress MMP2. CONCLUSIONS (68)Ga-NOTA-C6 is a potential radiopharmaceutical for the imaging of in vivo MMP2 activity in tumors.
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Affiliation(s)
- Qinghua Liu
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433.
| | - Donghui Pan
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063
| | - Chao Cheng
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433
| | - Anyu Zhang
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433
| | - Chao Ma
- Department of Nuclear Medicine, Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China, 361004
| | - Lizhen Wang
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063
| | - Dazhi Zhang
- Department of Organic Chemistry, School of Pharmacy, the Second Military Medical University, Shanghai, China, 200433
| | - Hongrui Liu
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China, 201203
| | - Hongdie Jiang
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433
| | - Tao Wang
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433
| | - Yuping Xu
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063
| | - Runlin Yang
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063
| | - Fei Chen
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063
| | - Min Yang
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, Wuxi, Jiangsu, China, 214063.
| | - Changjing Zuo
- Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China, 200433.
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Altıparmak B, Lambrecht FY, Citak A. Design of radiolabeled gelatinase inhibitor peptide ((99m)Tc-CLP) and evaluation in rats. Appl Radiat Isot 2014; 89:130-3. [PMID: 24631744 DOI: 10.1016/j.apradiso.2014.02.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 01/16/2014] [Accepted: 02/13/2014] [Indexed: 11/15/2022]
Abstract
In malignant tissues, MMP-9 (gelatinase B, 92 kDa type IV collagenase) and MMP-2 (gelatinase A, 72 kDa type IV collagenase) are the most prevalent matrix metalloproteinases related to the tumor aggressiveness and metastatic potential. Since elevated levels of gelatinases are associated with poor prognosis in cancer patients, these enzymes are potential targets for tumor imaging to possibly predict metastases. In the present study, a cyclic decapeptide, CLP (Cys-Leu-Pro-Gly-His-Trp-Gly-Phe-Pro-Ser-Cys), was selected as a basic peptide because of its selective inhibitory activity toward gelatinases. The peptide was labelled with (99m)Tc with a radiolabelling efficiency of 94.6±4.1%. After determining the appropriate conditions for radiolabelling, a biodistribution study of radiolabelled peptide in Albino Wistar rats was done. According to biodistribution data, (99m)Tc-CLP showed high uptake in the lung, liver, uterus and spleen. The amount of normal tissue MMPs enzymes is known to be lower than a tumor tissue. In this connection, our findings show that matrix metalloproteinases inhibitory peptide which is CLP is labeled with (99m)Tc with high yield and radiolabeled peptide might be might be utilized for the imaging of gelatinase activity due to overexpression of MMP-2 and MMP-9 in tumor tissue.
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Affiliation(s)
- Burcu Altıparmak
- Department of Nuclear Applications, Institute of Nuclear Science, Ege University, Bornova, 35100 Izmir, Turkey
| | - Fatma Yurt Lambrecht
- Department of Nuclear Applications, Institute of Nuclear Science, Ege University, Bornova, 35100 Izmir, Turkey.
| | - Asli Citak
- Department of Nuclear Applications, Institute of Nuclear Science, Ege University, Bornova, 35100 Izmir, Turkey
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Altıparmak B, Lambrecht FY, Er O. Design of (99m) Tc-DTPA-CLP and preliminary evaluation in rats. Chem Biol Drug Des 2014; 83:362-6. [PMID: 24148110 DOI: 10.1111/cbdd.12253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 09/12/2013] [Accepted: 10/15/2013] [Indexed: 11/28/2022]
Abstract
Radiopharmaceuticals are localized in (malignant) tumor tissues by different mechanisms. One of these mechanisms, gelatinase enzyme activity, is associated with poor prognosis in cancer patients and potential targets for tumor imaging. There are some gelatinases to be associated with metastatic potential for tumor imaging to possibly predict metastases. In this study, a cyclic decapeptide conjugate, DTPA-CLP (DTPA-Cys-Leu-Pro-Gly-His-Trp-Gly-Phe-Pro-Ser-Cys), was selected as a peptide conjugate because of its selective inhibitory activity toward gelatinases. Peptide-conjugated DTPA-CLP was labeled with (99m) Tc with a radiolabeling efficiency of 97.0 ± 2.8%. After determining optimization conditions for radiolabeling, a biodistribution study of radiolabeled peptide in albino Wistar rats was performed. According to biodistribution data, (99m) Tc-DTPA-CLP showed high uptake in the lung, liver, uterus, and spleen. These results show that (99m) Tc-DTPA-CLP may be used for the imaging of gelatinase activity in metastatic tumors.
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Affiliation(s)
- Burcu Altıparmak
- Department of Nuclear Applications, Institute of Nuclear Science, Ege University, Bornova, Izmir, 35100, Turkey
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Velikyan I. Prospective of ⁶⁸Ga-radiopharmaceutical development. Theranostics 2013; 4:47-80. [PMID: 24396515 PMCID: PMC3881227 DOI: 10.7150/thno.7447] [Citation(s) in RCA: 235] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 10/01/2013] [Indexed: 01/29/2023] Open
Abstract
Positron Emission Tomography (PET) experienced accelerated development and has become an established method for medical research and clinical routine diagnostics on patient individualized basis. Development and availability of new radiopharmaceuticals specific for particular diseases is one of the driving forces of the expansion of clinical PET. The future development of the ⁶⁸Ga-radiopharmaceuticals must be put in the context of several aspects such as role of PET in nuclear medicine, unmet medical needs, identification of new biomarkers, targets and corresponding ligands, production and availability of ⁶⁸Ga, automation of the radiopharmaceutical production, progress of positron emission tomography technologies and image analysis methodologies for improved quantitation accuracy, PET radiopharmaceutical regulations as well as advances in radiopharmaceutical chemistry. The review presents the prospects of the ⁶⁸Ga-based radiopharmaceutical development on the basis of the current status of these aspects as well as wide range and variety of imaging agents.
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Affiliation(s)
- Irina Velikyan
- 1. Preclinical PET Platform, Department of Medicinal Chemistry, Uppsala University, SE-75183 Uppsala, Sweden
- 2. PET-Centre, Centre for Medical Imaging, Uppsala University Hospital, SE-75185, Uppsala, Sweden
- 3. Department of Radiology, Oncology, and Radiation Science, Uppsala University, SE-75285 Uppsala, Sweden
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Single step 18F-labeling of dimeric cycloRGD for functional PET imaging of tumors in mice. Nucl Med Biol 2013; 40:959-66. [PMID: 24090672 DOI: 10.1016/j.nucmedbio.2013.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Arylboronates afford rapid aqueous (18)F-labeling via the creation of a highly polar (18)F-aryltrifluoroborate anion ((18)F-ArBF3(-)). HYPOTHESIS Radiosynthesis of an (18)F-ArBF3(-) can be successfully applied to a clinically relevant peptide. To test this hypothesis, we labeled dimeric-cylcoRGD, [c(RGDfK)]2E because a) it is molecularly complex and provides a challenging substrate to test the application of this technique, and b) [c(RGDfK)]2E has already been labeled via several (18)F-labeling methods which provide for a preliminary comparison. GOAL To validate this labeling method in the context of a complex and clinically relevant tracer to show tumor-specific uptake ex vivo with representative PET images in vivo. METHODS An arylborimidine was conjugated to [c(RGDfK)]2E to give the precursor [c(RGDfK)]2E-ArB(dan), which was aliquoted and stored at -20 °C. Aliquots of 10 or 25 nmol, containing only micrograms of precursor, were labeled using relatively low levels of (18)F-activity. Following purification eight mice (pre-blocked/unblocked) with U87M xenograft tumors were injected with [c(RGDfK)]2E-(18)F-ArBF3(-) (n = 4) for ex vivo tissue dissection. Two sets of mice (pre-blocked/unblocked) were also imaged with PET-CT (n = 2). RESULTS The [c(RGDfK)]2E-ArB(dan) is converted within 15 min to [c(RGDfK)]2E-(18)F-ArBF3(-) in isolated radiochemical yields of ~10% (n = 3) at a minimum effective specific activity of 0.3 Ci/μmol. Biodistribution shows rapid clearance to the bladder via the kidney resulting in high tumor-to-blood and tumor-to-muscle ratios of >9 and >6 respectively while pre-blocking with [c(RGDfK)]2E showed high tumor specificity. PET imaging showed good contrast between tumor and non-target tissues confirming the biodistribution data. CONCLUSION An arylborimidine-RGD peptide is rapidly (18)F-labeled in one step, in good yield, at useful specific activity. Biodistribution studies with blocking controls show tumor specificity, which is corroborated by PET images. Advances in Knowledge and Implications for patient Care: Despite many antecedent examples of labeled RGD tracers, this work is the first to show direct aqueous labeling of bisRGD with an (18)F-ArBF3(-). Labeling occurs in near record rapidity (45 min) at useful effective specific activities and competitive yields for high contrast tumor specific images. As bisRGD has been imaged in humans with several prosthetics, this work suggests potential clinical applications of tracers appended with an (18)F-ArBF3(-). More generally, the ability to label a molecularly complex tracer suggests that this method could be useful to label many other peptides. Furthermore, these results portend the development of kits that use only microgram quantities of lyophilized precursor for on demand labeling. The ability to perform one-step aqueous labeling in under an hour to provide tracers with high T:NT ratios has important implications for developing radiotracers for use in fundamental research and in preclinical tracer studies.
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Jacobson O, Chen X. Interrogating tumor metabolism and tumor microenvironments using molecular positron emission tomography imaging. Theranostic approaches to improve therapeutics. Pharmacol Rev 2013; 65:1214-56. [PMID: 24064460 DOI: 10.1124/pr.113.007625] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Positron emission tomography (PET) is a noninvasive molecular imaging technology that is becoming increasingly important for the measurement of physiologic, biochemical, and pharmacological functions at cellular and molecular levels in patients with cancer. Formation, development, and aggressiveness of tumor involve a number of molecular pathways, including intrinsic tumor cell mutations and extrinsic interaction between tumor cells and the microenvironment. Currently, evaluation of these processes is mainly through biopsy, which is invasive and limited to the site of biopsy. Ongoing research on specific target molecules of the tumor and its microenvironment for PET imaging is showing great potential. To date, the use of PET for diagnosing local recurrence and metastatic sites of various cancers and evaluation of treatment response is mainly based on [(18)F]fluorodeoxyglucose ([(18)F]FDG), which measures glucose metabolism. However, [(18)F]FDG is not a target-specific PET tracer and does not give enough insight into tumor biology and/or its vulnerability to potential treatments. Hence, there is an increasing need for the development of selective biologic radiotracers that will yield specific biochemical information and allow for noninvasive molecular imaging. The possibility of cancer-associated targets for imaging will provide the opportunity to use PET for diagnosis and therapy response monitoring (theranostics) and thus personalized medicine. This article will focus on the review of non-[(18)F]FDG PET tracers for specific tumor biology processes and their preclinical and clinical applications.
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Affiliation(s)
- Orit Jacobson
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD.
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Morgat C, Hindié E, Mishra AK, Allard M, Fernandez P. Gallium-68: chemistry and radiolabeled peptides exploring different oncogenic pathways. Cancer Biother Radiopharm 2013; 28:85-97. [PMID: 23461410 DOI: 10.1089/cbr.2012.1244] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Abstract Early and specific tumor detection and also therapy selection and response evaluation are some challenges of personalized medicine. This calls for high sensitive and specific molecular imaging such as positron emission tomography (PET). The use of peptides for PET molecular imaging has undeniable advantages: possibility of targeting through peptide-receptor interaction, small size and low-molecular weight conferring good penetration in the tissue or at cellular level, low toxicity, no antigenicity, and possibility of wide choice for radiolabeling. Among β(+)-emitter radioelements, Gallium-68 is a very attractive positron-emitter compared with carbon-11 or fluorine-18 taking into account its easy production via a (68)Ge/(68)Ga generator and well established radiochemistry. Gallium-68 chemistry is based on well-defined coordination complexes with macrocycle or chelates having strong binding properties, particularly suitable for linking peptides that allow resistance to in vivo transchelation of the metal ion. Understanding specific and nonspecific molecular mechanisms involved in oncogenesis is one major key to develop new molecular imaging tools. The present review focuses on peptide signaling involved in different oncogenic pathways. This peptide signalization might be common for tumoral and non-tumoral processes or could be specific of an oncological process. This review describes gallium chemistry and different (68)Ga-radiolabeled peptides already in use or under development aiming at developing molecular PET imaging of different oncological processes.
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Cardiac Micro-PET-CT. CURRENT CARDIOVASCULAR IMAGING REPORTS 2013. [DOI: 10.1007/s12410-012-9188-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liu Z, Li Y, Lozada J, Pan J, Lin KS, Schaffer P, Perrin DM. Rapid, one-step, high yielding18F-labeling of an aryltrifluoroborate bioconjugate by isotope exchange at very high specific activity. J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.2990] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhibo Liu
- Chemistry Department, 2036 Main Mall; University of British Columbia; Vancouver; B.C.; V6T-1Z1; Canada
| | - Ying Li
- Chemistry Department, 2036 Main Mall; University of British Columbia; Vancouver; B.C.; V6T-1Z1; Canada
| | - Jerome Lozada
- Chemistry Department, 2036 Main Mall; University of British Columbia; Vancouver; B.C.; V6T-1Z1; Canada
| | - Jinhe Pan
- BC Cancer Agency - Vancouver Centre; Centre for Functional Imaging; 600 West 10th Avenue; Vancouver; B.C.; V5Z-4E6; Canada
| | - Kuo-Shyan Lin
- BC Cancer Agency - Vancouver Centre; Centre for Functional Imaging; 600 West 10th Avenue; Vancouver; B.C.; V5Z-4E6; Canada
| | - Paul Schaffer
- Triumf; 4004 Wesbrook Mall; Vancouver; B.C.; V6T-2A3; Canada
| | - David M. Perrin
- Chemistry Department, 2036 Main Mall; University of British Columbia; Vancouver; B.C.; V6T-1Z1; Canada
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Abstract
The matrix metalloproteinases (MMPs) exhibit a broad array of activities, some catalytic and some non-catalytic in nature. An overall lack of selectivity has rendered small molecule, active site targeted MMP inhibitors problematic in execution. Inhibitors that favor few or individual members of the MMP family often take advantage of interactions outside the enzyme active site. We presently focus on peptide-based MMP inhibitors and probes that do not incorporate conventional Zn2+ binding groups. In some cases, these inhibitors and probes function by binding only secondary binding sites (exosites), while others bind both exosites and the active site. A myriad of MMP mediated-activities beyond selective catalysis can be inhibited by peptides, particularly cell adhesion, proliferation, motility, and invasion. Selective MMP binding peptides comprise highly customizable, unique imaging agents. Areas of needed improvement for MMP targeting peptides include binding affinity and stability.
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Da Rocha Gomes S, Miguel J, Azéma L, Eimer S, Ries C, Dausse E, Loiseau H, Allard M, Toulmé JJ. (99m)Tc-MAG3-aptamer for imaging human tumors associated with high level of matrix metalloprotease-9. Bioconjug Chem 2012; 23:2192-200. [PMID: 23043415 DOI: 10.1021/bc300146c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The human matrix metalloprotease 9 (hMMP-9) is involved in many physiological processes such as tissue remodeling. Its overexpression in tumors promotes the release of cancer cells thus contributing to tumor metastasis. It is a relevant marker of malignant tumors. We selected an RNA aptamer containing 2'-fluoro, pyrimidine ribonucleosides, that exhibits a strong affinity for hMMP-9 (K(d) = 20 nM) and that discriminates other human MMPs: no binding was detected to either hMMP-2 or -7. Investigating the binding properties of different MMP-9 aptamer variants by surface plasmon resonance allowed the determination of recognition elements. As a result, a truncated aptamer, 36 nucleotides long, was made fully resistant to nuclease following the substitution of every purine ribonucleoside residue by 2'-O-methyl analogues and was conjugated to S-acetylmercaptoacetyltriglycine for imaging purposes. The resulting modified aptamer retained the binding properties of the originally selected sequence. Following (99m)Tc labeling, this aptamer was used for ex vivo imaging slices of human brain tumors. We were able to specifically detect the presence of hMMP-9 in such tissues.
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Affiliation(s)
- Sonia Da Rocha Gomes
- INSERM U869, ARNA, Institut Européen de Chimie et Biologie, 33607 Pessac, France
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68Ga-labeling and in vivo evaluation of a uPAR binding DOTA- and NODAGA-conjugated peptide for PET imaging of invasive cancers. Nucl Med Biol 2011; 39:560-9. [PMID: 22172391 DOI: 10.1016/j.nucmedbio.2011.10.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 10/03/2011] [Accepted: 10/10/2011] [Indexed: 01/25/2023]
Abstract
INTRODUCTION The urokinase-type plasminogen activator receptor (uPAR) is a well-established biomarker for tumor aggressiveness and metastatic potential. DOTA-AE105 and DOTA-AE105-NH(2) labeled with (64)Cu have previously been demonstrated to be able to noninvasively monitor uPAR expression using positron emission tomography (PET) in human cancer xenograft mice models. Here we introduce (68)Ga-DOTA-AE105-NH(2) and (68)Ga-NODAGA-AE105-NH(2) and evaluate their imaging properties using small-animal PET. METHODS Synthesis of DOTA-AE105-NH(2) and NODAGA-AE105-NH(2) was based on solid-phase peptide synthesis protocols using the Fmoc strategy. (68)GaCl(3) was eluted from a (68)Ge/(68)Ga generator. The eluate was either concentrated on a cation-exchange column or fractionated and used directly for labeling. For in vitro characterization of both tracers, partition coefficient, buffer and plasma stability, uPAR binding affinity and cell uptake were determined. To characterize the in vivo properties, dynamic microPET imaging was carried out in nude mice bearing human glioma U87MG tumor xenograft. RESULTS In vitro experiments revealed uPAR binding affinities in the lower nM range for both conjugated peptides and identical to AE105. Labeling of DOTA-AE105-NH(2) and NODAGA-AE105-NH(2) with (68)Ga was done at 95°C and room temperature, respectively. The highest radiochemical yield and purity were obtained using fractionated elution, whereas a negative effect of acetone on labeling efficiency for NODAGA-AE105-NH(2) was observed. Good stability in phosphate-buffered saline and mouse plasma was observed. High cell uptake was found for both tracers in U87MG tumor cells. Dynamic microPET imaging demonstrated good tumor-to-background ratio for both tracers. Tumor uptake was 2.1% ID/g and 1.3% ID/g 30 min postinjection and 2.0% ID/g and 1.1% ID/g 60 min postinjection for (68)Ga-NODAGA-AE105-NH(2) and (68)Ga-DOTA-AE105-NH(2), respectively. A significantly higher tumor-to-muscle ratio (P<.05) was found for (68)Ga-NODAGA-AE105-NH(2) 60 min postinjection. CONCLUSIONS The use of (68)Ga-DOTA-AE105-NH(2) and (68)Ga-NODAGA-AE105-NH(2) as the first gallium-68 labeled uPAR radiotracers for noninvasive PET imaging is reported, which combine versatility with good imaging properties. These new tracers thus constitute an interesting alternative to the (64)Cu-labeled version ((64)Cu-DOTA-AE105 and 64Cu-DOTA-AE105-NH(2)) for detecting uPAR expression in tumor tissue. In our hands, the fractionated elution approach was superior for labeling of peptides, and (68)Ga-NODAGA-AE105-NH(2) is the favored tracer as it provides the highest tumor-to-background ratio.
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Chuang CH, Chuang KH, Wang HE, Roffler SR, Shiea JT, Tzou SC, Cheng TC, Kao CH, Wu SY, Tseng WL, Cheng CM, Hou MF, Wang JM, Cheng TL. In vivo positron emission tomography imaging of protease activity by generation of a hydrophobic product from a noninhibitory protease substrate. Clin Cancer Res 2011; 18:238-47. [PMID: 22019516 DOI: 10.1158/1078-0432.ccr-11-0608] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To develop an imaging technology for protease activities in patients that could help in prognosis prediction and in design of personalized, protease-based inhibitors and prodrugs for targeted therapy. EXPERIMENTAL DESIGN Polyethylene glycol (PEG) was covalently attached to the N-terminus of a hydrophilic peptide substrate (GPLGVR) for matrix metalloproteinase (MMP) to increase hydrophilicity. PEG-peptide was then linked to a hydrophobic tetramethylrhodamine (TMR) domain and labeled with (18)F to form a PEG-peptide-(18)F-TMR probe. Specific cleavage of the probe by MMP2 was tested in vitro by matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF). In vivo imaging of MMP2-expressing tumors was evaluated by micro-PET. RESULTS The hydrophobic TMR fragment (948 Da) was specifically generated by MMP2 enzymes and MMP-expressing HT1080 cells but not control MCF-7 cells. MMP-expressing HT1080 cells and tumors selectively accumulated the hydrolyzed, hydrophobic TMR fragment at sites of protease activity. Importantly, we found that (18)F-labeled probe ((18)F-TMR) preferentially localized in HT1080 tumors but not control MCF-7 tumors as shown by micro-PET. Uptake of the probe in HT1080 tumors was 18.4 ± 1.9-fold greater than in the MCF-7 tumors 30 minutes after injection. These results suggest that the PEG-peptide-(18)F-TMR probe displays high selectivity for imaging MMP activity. CONCLUSIONS This strategy successfully images MMP expression in vivo and may be extended to other proteases to predict patient prognosis and to design personalized, protease-based inhibitors and prodrug-targeted therapies.
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Affiliation(s)
- Chih-Hung Chuang
- Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan
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Ma MT, Neels OC, Denoyer D, Roselt P, Karas JA, Scanlon DB, White JM, Hicks RJ, Donnelly PS. Gallium-68 Complex of a Macrobicyclic Cage Amine Chelator Tethered to Two Integrin-Targeting Peptides for Diagnostic Tumor Imaging. Bioconjug Chem 2011; 22:2093-103. [DOI: 10.1021/bc200319q] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Oliver C. Neels
- The Centre for Molecular Imaging and Translational Research Laboratory, The Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Delphine Denoyer
- The Centre for Molecular Imaging and Translational Research Laboratory, The Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Peter Roselt
- The Centre for Molecular Imaging and Translational Research Laboratory, The Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | | | | | | | - Rodney J. Hicks
- The Centre for Molecular Imaging and Translational Research Laboratory, The Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
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