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Wang J, Li B, Cooper RC, Huang D, Yang H. Localized Sustained Release of Copper Enhances Antitumor Effects of Disulfiram in Head and Neck Cancer. Biomacromolecules 2024; 25:2770-2779. [PMID: 38687975 PMCID: PMC11143945 DOI: 10.1021/acs.biomac.3c01420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Drug repurposing uses approved drugs as candidate anticancer therapeutics, harnesses previous research and development efforts, and benefits from available clinically suitable formulations and evidence of patient tolerability. In this work, the drug used clinically to treat chronic alcoholism, disulfiram (DSF), was studied for its antitumor efficacy in a copper-dependent manner. The combination of DSF and copper could achieve a tumor cell growth inhibition effect comparable to those of 5-fluorouracil and taxol on head and neck cancer cells. Both bulk dendrimer hydrogel and microsized dendrimer hydrogel particles were utilized for the localized sustained release of copper in the tumor site. The localized sustained release of copper facilitated the tumor inhibition effect following intratumoral injection in a mouse's head and neck cancer model.
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Affiliation(s)
- Juan Wang
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, China
| | - Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Remy C Cooper
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Da Huang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Hu Yang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
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Herrero Álvarez N, Bauer D, Hernández-Gil J, Lewis JS. Recent Advances in Radiometals for Combined Imaging and Therapy in Cancer. ChemMedChem 2021; 16:2909-2941. [PMID: 33792195 DOI: 10.1002/cmdc.202100135] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Indexed: 12/14/2022]
Abstract
Nuclear medicine is defined as the use of radionuclides for diagnostic and therapeutic applications. The imaging modalities positron emission tomography (PET) and single-photon emission computed tomography (SPECT) are based on γ-emissions of specific energies. The therapeutic technologies are based on β- -particle-, α-particle-, and Auger electron emitters. In oncology, PET and SPECT are used to detect cancer lesions, to determine dosimetry, and to monitor therapy effectiveness. In contrast, radiotherapy is designed to irreparably damage tumor cells in order to eradicate or control the disease's progression. Radiometals are being explored for the development of diagnostic and therapeutic radiopharmaceuticals. Strategies that combine both modalities (diagnostic and therapeutic), referred to as theranostics, are promising candidates for clinical applications. This review provides an overview of the basic concepts behind therapeutic and diagnostic radiopharmaceuticals and their significance in contemporary oncology. Select radiometals that significantly impact current and upcoming cancer treatment strategies are grouped as clinically suitable theranostics pairs. The most important physical and chemical properties are discussed. Standard production methods and current radionuclide availability are provided to indicate whether a cost-efficient use in a clinical routine is feasible. Recent preclinical and clinical developments and outline perspectives for the radiometals are highlighted in each section.
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Affiliation(s)
- Natalia Herrero Álvarez
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - David Bauer
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Javier Hernández-Gil
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.,Biomedical MRI/MoSAIC, Department of Imaging and Pathology, Katholieke Universiteit, Herestraat 49, 3000, Leuven, Belgium
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.,Department of Radiology, Weill Cornell Medical College, 1300 York Avenue, New York, NY, 10065, USA.,Department of Pharmacology, Weill-Cornell Medical College, New York, NY, 10065, USA
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Bardajee GR, Mohammadi M, Kakavand N. Copper(II)-diaminosarcophagine-functionalized SBA-15: a heterogeneous nanocatalyst for the synthesis of benzimidazole, benzoxazole and benzothiazole derivatives under solvent-free conditions. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3400] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Marzieh Mohammadi
- Department of Chemistry; Faculty of Science; Urmia University; 57159 Urmia Iran
| | - Nahale Kakavand
- Department of Chemistry; Payame Noor University (PNU); PO Box 19395-3697 Tehran Iran
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Hu H, Li D, Liu S, Wang M, Moats R, Conti PS, Li Z. Integrin α2β1 targeted GdVO4:Eu ultrathin nanosheet for multimodal PET/MR imaging. Biomaterials 2014; 35:8649-58. [DOI: 10.1016/j.biomaterials.2014.06.059] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 06/30/2014] [Indexed: 12/19/2022]
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Hu H, Liu S, Li D, Wang M, Moats R, Shan H, Conti PS, Li Z. The synthesis of lanthanide-doped GdVO4ultrathin nanosheets with great optical and paramagnetic properties for FRET biodetection and in vivo MR imaging. J Mater Chem B 2014; 2:3998-4007. [DOI: 10.1039/c4tb00144c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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7
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Janib SM, Liu S, Park R, Pastuszka MK, Shi P, Moses AS, Orosco MM, Lin YA, Cui H, Conti PS, Li Z, MacKay JA. Kinetic quantification of protein polymer nanoparticles using non-invasive imaging. Integr Biol (Camb) 2013; 5:183-94. [PMID: 23093022 DOI: 10.1039/c2ib20169k] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Protein polymers are repetitive amino acid sequences that can assemble monodisperse nanoparticles with potential applications as cancer nanomedicines. Of the currently available molecular imaging methods, positron emission tomography (PET) is the most sensitive and quantitative; therefore, this work explores microPET imaging to track protein polymer nanoparticles over several days. To achieve reliable imaging, the polypeptides were modified by site-specific conjugation using a heterobifunctional sarcophagine chelator, AmBaSar, which was subsequently complexed with (64)Cu. AmBaSar/(64)Cu was selected because it can label particles in vivo over periods of days, which is consistent with the timescales required to follow long-circulating nanotherapeutics. Using an orthotopic model of breast cancer, we observed four elastin-like polypeptides (ELPs)-based protein polymers of varying molecular weight, amino acid sequence, and nanostructure. To analyze this data, we developed a six-compartment image-driven pharmacokinetic model capable of describing their distribution within individual subjects. Surprisingly, the assembly of an ELP block copolymer (78 kD) into nanoparticles (R(h) = 37.5 nm) minimally influences pharmacokinetics or tumor accumulation compared to a free ELP of similar length (74 kD). Instead, ELP molecular weight is the most important factor controlling the fate of these polymers, whereby long ELPs (74 kD) have a heart activity half-life of 8.7 hours and short ELPs (37 kD) have a half-life of 2.1 hours. These results suggest that ELP-based protein polymers may be a viable platform for the development of multifunctional therapeutic nanoparticles that can be imaged using clinical PET scanners.
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Affiliation(s)
- S M Janib
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90033-9121, USA
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Yapp DT, Ferreira CL, Gill RK, Boros E, Wong MQ, Mandel D, Jurek P, Kiefer GE. Imaging Tumor Vasculature Noninvasively with Positron Emission Tomography and RGD Peptides Labeled with Copper 64 Using the Bifunctonal Chelates DOTA, Oxo-DO3A. and PCTA. Mol Imaging 2013. [DOI: 10.2310/7290.2012.00044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Affiliation(s)
- Donald T.T. Yapp
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Cara L. Ferreira
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Rajanvir K. Gill
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Eszter Boros
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - May Q. Wong
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Derek Mandel
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Paul Jurek
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
| | - Garry E. Kiefer
- From Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, BC; Nordion, Vancouver, BC; TRIUMF, Vancouver, BC; Department of Chemistry, University of British Columbia, Vancouver, BC; and Macrocyclics, Dallas, TX
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Liu S, Lin TP, Li D, Leamer L, Shan H, Li Z, Gabbaï FP, Conti PS. Lewis acid-assisted isotopic 18F-19F exchange in BODIPY dyes: facile generation of positron emission tomography/fluorescence dual modality agents for tumor imaging. Am J Cancer Res 2013; 3:181-9. [PMID: 23471211 PMCID: PMC3590587 DOI: 10.7150/thno.5984] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 02/09/2013] [Indexed: 11/05/2022] Open
Abstract
Positron emission tomography (PET) is a powerful technique for imaging biological pathways in vivo, particularly those that are key targets in disease processes. In contrast, fluorescence imaging has demonstrated to be a superior method for image-guided surgery, such as tumor removal. Although the integration of PET and optical imaging could provide an attractive strategy for patient management, there is a significant shortage of established platforms/methods for PET/optical probe construction. In this study, various reaction conditions were explored to develop a simple and fast method allowing for the introduction of [(18)F]-fluoride into BODIPY dyes. Through a systematic optimization of the reaction conditions, we found that BODIPY dyes, including commercial amine-reactive BODIPY succinimidyl esters, may be converted into their radioactive analogues in the matter of minutes via a (18)F-(19)F isotopic exchange reaction promoted by a Lewis acid such as SnCl4. An integrin-targeting RGD peptide was also conjugated with [(18)F]BODIPY® R6G , derived from the commercially available BODIPY® R6G fluorescent tag, to provide a [(18)F]-RGD conjugate in 82% yield. In vivo evaluation of this imaging probe showed a discernible tumor uptake in the U87MG xenograft model. The dual modality imaging properties of the probe was confirmed by ex vivo fluorescence and microPET imaging experiments. In summary, in the matter of minutes, BODIPY dyes were converted into their "hot" radioactive analogues via a (18)F-(19)F isotopic exchange reaction promoted by a Lewis acid. This approach, which can be applied to commercial BODIPY dyes, provides easy access to positron emission tomography/fluorescence dual modality imaging agents.
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Huang CW, Li Z, Conti PS. Radioactive Smart Probe for Potential Corrected Matrix Metalloproteinase Imaging. Bioconjug Chem 2012; 23:2159-67. [DOI: 10.1021/bc3001968] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Chiun-Wei Huang
- Molecular
Imaging Center, Department of Radiology, University of Southern California, Los Angeles, California
90033, United States
| | - Zibo Li
- Molecular
Imaging Center, Department of Radiology, University of Southern California, Los Angeles, California
90033, United States
| | - Peter S. Conti
- Molecular
Imaging Center, Department of Radiology, University of Southern California, Los Angeles, California
90033, United States
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Cooper MS, Ma MT, Sunassee K, Shaw KP, Williams JD, Paul RL, Donnelly PS, Blower PJ. Comparison of (64)Cu-complexing bifunctional chelators for radioimmunoconjugation: labeling efficiency, specific activity, and in vitro/in vivo stability. Bioconjug Chem 2012; 23:1029-39. [PMID: 22471317 PMCID: PMC4756438 DOI: 10.1021/bc300037w] [Citation(s) in RCA: 170] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High radiolabeling efficiency, preferably to high specific activity, and good stability of the radioimmunoconjugate are essential features for a successful immunoconjugate for imaging or therapy. In this study, the radiolabeling efficiency, in vitro stability, and biodistribution of immunoconjugates with eight different bifunctional chelators labeled with (64)Cu were compared. The anti-CD20 antibody, rituximab, was conjugated to four macrocyclic bifunctional chelators (p-SCN-Bn-DOTA, p-SCN-Bn-Oxo-DO3A, p-SCN-NOTA, and p-SCN-PCTA), three DTPA derivatives (p-SCN-Bn-DTPA, p-SCN-CHX-A″-DTPA, and ITC-2B3M-DTPA), and a macrobicyclic hexamine (sarcophagine) chelator (sar-CO2H) = (1-NH2-8-NHCO(CH2)3CO2H)sar where sar = sarcophagine = 3,6,10,13,16,19-hexaazabicyclo[6.6.6]icosane). Radiolabeling efficiency under various conditions, in vitro stability in serum at 37 °C, and in vivo biodistribution and imaging in normal mice over 48 h were studied. All chelators except sar-CO2H were conjugated to rituximab by thiourea bond formation with an average of 4.9 ± 0.9 chelators per antibody molecule. Sar-CO2H was conjugated to rituximab by amide bond formation with 0.5 chelators per antibody molecule. Efficiencies of (64)Cu radiolabeling were dependent on the concentration of immunoconjugate. Notably, the (64)Cu-NOTA-rituximab conjugate demonstrated the highest radiochemical yield (95%) under very dilute conditions (31 nM NOTA-rituximab conjugate). Similarly, sar-CO-rituximab, containing 1/10th the number of chelators per antibody compared to that of other conjugates, retained high labeling efficiency (98%) at an antibody concentration of 250 nM. In contrast to the radioimmunoconjugates containing DTPA derivatives, which demonstrated poor serum stability, all macrocyclic radioimmunoconjugates were very stable in serum with <6% dissociation of (64)Cu over 48 h. In vivo biodistribution profiles in normal female Balb/C mice were similar for all the macrocyclic radioimmunoconjugates with most of the activity remaining in the blood pool up to 48 h. While all the macrocyclic bifunctional chelators are suitable for molecular imaging using (64)Cu-labeled antibody conjugates, NOTA and sar-CO2H show significant advantages over the others in that they can be radiolabeled rapidly at room temperature, under dilute conditions, resulting in high specific activity.
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Affiliation(s)
- Maggie S. Cooper
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
| | - Michelle T. Ma
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Melbourne, Victoria, 3010, Australia
| | - Kavitha Sunassee
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
| | - Karen P. Shaw
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
| | - Jennifer D. Williams
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
| | - Rowena L. Paul
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Melbourne, Victoria, 3010, Australia
| | - Philip J. Blower
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, 4 Floor Lambeth Wing, St. Thomas’ Hospital, SE1 7EH, London
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Zhang Y, Hong H, Engle JW, Bean J, Yang Y, Leigh BR, Barnhart TE, Cai W. Positron emission tomography imaging of CD105 expression with a 64Cu-labeled monoclonal antibody: NOTA is superior to DOTA. PLoS One 2011; 6:e28005. [PMID: 22174762 PMCID: PMC3235104 DOI: 10.1371/journal.pone.0028005] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 10/29/2011] [Indexed: 01/27/2023] Open
Abstract
Optimizing the in vivo stability of positron emission tomography (PET) tracers is of critical importance to cancer diagnosis. In the case of 64Cu-labeled monoclonal antibodies (mAb), in vivo behavior and biodistribution is critically dependent on the performance of the bifunctional chelator used to conjugate the mAb to the radiolabel. This study compared the in vivo characteristics of 64Cu-labeled TRC105 (a chimeric mAb that binds to both human and murine CD105), through two commonly used chelators: 1,4,7-triazacyclononane-1,4,7-triacetic acid (NOTA) and 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA). Flow cytometry analysis confirmed that chelator conjugation of TRC105 did not affect its CD105 binding affinity or specificity. PET imaging and biodistribution studies in 4T1 murine breast tumor-bearing mice revealed that 64Cu-NOTA-TRC105 exhibited better stability than 64Cu-DOTA-TRC105 in vivo, which resulted in significantly lower liver uptake without compromising the tumor targeting efficiency. In conclusion, this study confirmed that NOTA is a superior chelator to DOTA for PET imaging with 64Cu-labeled TRC105.
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Affiliation(s)
- Yin Zhang
- Department of Medical Physics, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Hao Hong
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Jonathan W. Engle
- Department of Medical Physics, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Jero Bean
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Yunan Yang
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Bryan R. Leigh
- TRACON Pharmaceuticals, Inc., San Diego, California, United States of America
| | - Todd E. Barnhart
- Department of Medical Physics, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
| | - Weibo Cai
- Department of Medical Physics, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin, United States of America
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin, United States of America
- * E-mail:
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Huang CW, Li Z, Conti PS. In vivo near-infrared fluorescence imaging of integrin α2β1 in prostate cancer with cell-penetrating-peptide-conjugated DGEA probe. J Nucl Med 2011; 52:1979-86. [PMID: 22065876 DOI: 10.2967/jnumed.111.091256] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED The overexpression of integrin α(2)β(1) has been demonstrated to correlate with prostate tumor aggressiveness and metastatic potential. Recently, we reported that the DGEA peptide is a promising targeting ligand for near-infrared fluorescence and microPET imaging of integrin α(2)β(1) expression in prostate cancers. Here, we aimed to further improve the targeting efficacy of this peptide by incorporating a series of cell-penetrating peptides (CPPs) into the DGEA sequence. METHODS After the conjugation with appropriate fluorescent dyes, the CPP-DGEA peptides were evaluated in human prostate cell lines (PC-3, CWR-22, and LNCaP) that contain different integrin α(2)β(1) expression levels. In addition, to reduce excess kidney uptake, a carboxypeptidase-specific sequence Gly-Lys was incorporated into the probe design, allowing for cleavage by the kidney brush border enzymes of the CPP before uptake by proximal tubule cells. RESULTS Although the CPP motif greatly facilitated the translocation of CPP-DGEA without affecting binding specificity in vitro, fluorescent dye-labeled CPP-DGEA demonstrated extremely high kidney uptake in vivo. Kidney uptake was dramatically decreased after a carboxypeptidase-specific peptide linker (Gly-Lys) had been incorporated into the probe design. The optimized probe demonstrated a prominent accumulation of activity in PC-3 tumor (integrin α(2)β(1)-positive). Receptor specificity was confirmed with blocking experiments and evaluation in a CWR-22 control tumor model with low α(2)β(1) expression. CONCLUSION This study demonstrated that the introduction of a CPP sequence can facilitate the internalization of an integrin-targeted peptide probe in vitro. Moreover, a cleavable peptide linker successfully reduced kidney uptake while preserving good tumor uptake in vivo.
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Affiliation(s)
- Chiun-Wei Huang
- Molecular Imaging Center, Department of Radiology, University of Southern California, Los Angeles, California 90033, USA
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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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