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Zakarial Ansar FH, Latifah SY, Wan Kamal WHB, Khong KC, Ng Y, Foong JN, Gopalsamy B, Ng WK, How CW, Ong YS, Abdullah R, Aziz MY. Pharmacokinetics and Biodistribution of Thymoquinone-loaded Nanostructured Lipid Carrier After Oral and Intravenous Administration into Rats. Int J Nanomedicine 2020; 15:7703-7717. [PMID: 33116496 PMCID: PMC7553255 DOI: 10.2147/ijn.s262395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/27/2020] [Indexed: 12/28/2022] Open
Abstract
Background Thymoquinone (TQ), an active compound isolated from Nigella sativa, has been proven to exhibit various biological properties such as antioxidant. Although oral delivery of TQ is valuable, it is limited by poor oral bioavailability and low solubility. Recently, TQ-loaded nanostructured lipid carrier (TQ-NLC) was formulated with the aim of overcoming the limitations. TQ-NLC was successfully synthesized by the high-pressure homogenization method with remarkable physiochemical properties whereby the particle size is less than 100 nm, improved encapsulation efficiency and is stable up to 24 months of storage. Nevertheless, the pharmacokinetics and biodistribution of TQ-NLC have not been studied. This study determined the bioavailability of oral and intravenous administration of thymoquinone-loaded nanostructured lipid carrier (TQ-NLC) in rats and its distribution to organs. Materials and Methods TQ-NLC was radiolabeled with technetium-99m before the administration to the rats. The biodistribution and pharmacokinetics parameters were then evaluated at various time points. The rats were imaged at time intervals and the percentage of the injected dose/gram (%ID/g) in blood and each organ was analyzed. Results Oral administration of TQ-NLC exhibited greater relative bioavailability compared to intravenous administration. It is postulated that the movement of TQ-NLC through the intestinal lymphatic system bypasses the first metabolism and therefore enhances the relative bioavailability. However, oral administration has a slower absorption rate compared to intravenous administration where the AUC0-∞ was 4.539 times lower than the latter. Conclusion TQ-NLC had better absorption when administered intravenously compared to oral administration. However, oral administration showed greater bioavailability compared to the intravenous route. This study provides the pharmacokinetics and biodistribution profile of TQ-NLC in vivo which is useful to assist researchers in clinical use.
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Affiliation(s)
- Fatin Hannani Zakarial Ansar
- Laboratory of Molecular Medicine, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Saiful Yazan Latifah
- Laboratory of Molecular Medicine, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.,Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Wan Hamirul Bahrin Wan Kamal
- Laboratory of Preclinical Study, Block 24, Medical Technology Division, Malaysian Nuclear Agency, Kajang, Selangor, Malaysia
| | - Khei Choong Khong
- Laboratory of Preclinical Study, Block 24, Medical Technology Division, Malaysian Nuclear Agency, Kajang, Selangor, Malaysia
| | - Yen Ng
- Laboratory of Preclinical Study, Block 24, Medical Technology Division, Malaysian Nuclear Agency, Kajang, Selangor, Malaysia
| | - Jia Ning Foong
- Laboratory of Molecular Medicine, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Banulata Gopalsamy
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Wei Keat Ng
- Laboratory of Molecular Medicine, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Chee Wun How
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Yong Sze Ong
- Laboratory of Molecular Medicine, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Rasedee Abdullah
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.,Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Mohd Yusmaidie Aziz
- Advanced Medical and Dental Institute, University of Science Malaysia, Kepala Batas, Pulau Pinang, Malaysia
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Synthesis and biodistribution of 1-[2-(cyclopentadienyltricarbonyltechnetium-99m)-2-oxo-ethoxy-phenyl]-1,2-di- (p-hydroxyphenyl)but-1-ene for tumor imaging. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Hassanzadeh L, Chen S, Veedu RN. Radiolabeling of Nucleic Acid Aptamers for Highly Sensitive Disease-Specific Molecular Imaging. Pharmaceuticals (Basel) 2018; 11:E106. [PMID: 30326601 PMCID: PMC6315947 DOI: 10.3390/ph11040106] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/06/2018] [Accepted: 10/10/2018] [Indexed: 12/14/2022] Open
Abstract
Aptamers are short single-stranded DNA or RNA oligonucleotide ligand molecules with a unique three-dimensional shape, capable of binding to a defined molecular target with high affinity and specificity. Since their discovery, aptamers have been developed for various applications, including molecular imaging, particularly nuclear imaging that holds the highest potential for the clinical translation of aptamer-based molecular imaging probes. Their easy laboratory production without any batch-to-batch variations, their high stability, their small size with no immunogenicity and toxicity, and their flexibility to incorporate various functionalities without compromising the target binding affinity and specificity make aptamers an attractive class of targeted-imaging agents. Aptamer technology has been utilized in nuclear medicine imaging techniques, such as single photon emission computed tomography (SPECT) and positron emission tomography (PET), as highly sensitive and accurate biomedical imaging modalities towards clinical diagnostic applications. However, for aptamer-targeted PET and SPECT imaging, conjugation of appropriate radionuclides to aptamers is crucial. This review summarizes various strategies to link the radionuclides to chemically modified aptamers to accomplish aptamer-targeted PET and SPECT imaging.
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Affiliation(s)
- Leila Hassanzadeh
- Department of Nuclear Medicine, School of Medicine, Rajaie Cardiovascular, Medical and Research Center & Department of Medicinal Chemistry, School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran 1449614535, Iran.
- Centre for Comparative Genomics, Murdoch University, Perth 6150, Australia.
| | - Suxiang Chen
- Centre for Comparative Genomics, Murdoch University, Perth 6150, Australia.
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia.
| | - Rakesh N Veedu
- Centre for Comparative Genomics, Murdoch University, Perth 6150, Australia.
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia.
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4
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Monteiro LOF, Fernandes RS, Oda CMR, Lopes SC, Townsend DM, Cardoso VN, Oliveira MC, Leite EA, Rubello D, de Barros ALB. Paclitaxel-loaded folate-coated long circulating and pH-sensitive liposomes as a potential drug delivery system: A biodistribution study. Biomed Pharmacother 2018; 97:489-495. [PMID: 29091899 PMCID: PMC6361139 DOI: 10.1016/j.biopha.2017.10.135] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/18/2017] [Accepted: 10/21/2017] [Indexed: 02/07/2023] Open
Abstract
A range of antitumor agents for cancer treatment is available; however, they show low specificity, which often limit their use. Recently, we have reported the preparation of folate-coated long-circulating and pH-sensitive liposomes (SpHL-folate-PTX) loaded with paclitaxel (PTX), an effective drug for the treatment of solid tumors, including breast cancer. The purpose of this study was to prepare and characterize SpHL-PTX and SpHL-folate-PTX radiolabeled with technetium-99m (99mTc). Biodistribution studies and scintigraphic images were performed after intravenous administration of 99mTc-PTX, 99mTc-SpHL-PTX and 99mTc-SpHL-folate-PTX into healthy and tumor-bearing mice. High radiochemical purity (>98%) and in vitro stability (>90%) were achieved for both liposome formulations. The pharmacokinetic properties of 99mTc-SpHL-DTPA-PTX and 99mTc-SpHL-folate-DTPA-PTX decreased in a monophasic manner showing half-life of 400.1 and 541.8min, respectively. Scintigraphic images and biodistribution studies showed a significant uptake in liver, spleen and kidneys, demonstrating these routes as way for excretion. At 8h post-injection, the liposomal tumor uptake was higher than 99mTc-PTX. Interesting, 4h after administration, the liposome folate coated showed higher tumor-to-muscle ratio than 99mTc-SpHL-DTPA-PTX and 99mTc-PTX. In conclusion, the liposomal systems, showed high tumor uptake by scintigraphic images, especially the 99mTc-SpHL-folate-DTPA-PTX that showed a sustained and higher tumor-to-muscle ratio than non-functionalized liposome, which indicate its feasibility as a PTX delivery system to folate positive tumors.
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Affiliation(s)
- Liziane O F Monteiro
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renata S Fernandes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Caroline M R Oda
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sávia C Lopes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, USA
| | - Valbert N Cardoso
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mônica C Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine A Leite
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Domenico Rubello
- Department of Nuclear Medicine, Santa Maria della Misericordia Hospital, Rovigo, Italy.
| | - André L B de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Monteiro LOF, Fernandes RS, Castro LC, Cardoso VN, Oliveira MC, Townsend DM, Ferretti A, Rubello D, Leite EA, de Barros ALB. Technetium-99m radiolabeled paclitaxel as an imaging probe for breast cancer in vivo. Biomed Pharmacother 2017; 89:146-151. [PMID: 28222395 PMCID: PMC5553547 DOI: 10.1016/j.biopha.2017.02.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 02/03/2017] [Indexed: 12/19/2022] Open
Abstract
The high incidence and mortality of breast cancer supports efforts to develop innovative imaging probes to effectively diagnose, evaluate the extent of the tumor, and predict the efficacy of tumor treatments while concurrently and selectively delivering anticancer agents to the cancer tissue. In the present study we described the preparation of technetium-99m (99mTc)-labeled paclitaxel (PTX) and evaluated its feasibility as a radiotracer for breast tumors (4T1) in BALB/c mice. Thin Layer Chromatography (TLC) was used to determine the radiochemical purity and in vitro stability of 99mTc-PTX. PTX micelles showed a unimodal distribution with mean diameter of 13.46±0.06nm. High radiochemical purity (95.8±0.3%) and in vitro stability (over than 95%), up to 24h, were observed. Blood circulation time of 99mTc-PTX was determined in healthy BALB/c mice. 99mTc-PTX decays in a one-phase manner with a half-life of 464.3 minutes. Scintigraphic images and biodistribution were evaluated at 4, 8 and 24h after administration of 99mTc-PTX in 4T1 tumor-bearing mice. The data showed a significant uptake in the liver, spleen and kidneys, due to the importance of these routes for excretion. Moreover, high tumor uptake was achieved, indicated by high tumor-to-muscle ratios. These findings indicate the usefulness of 99mTc-PTX as a radiotracer to identify 4T1 tumor in animal models. In addition, 99mTc-PTX might be used to follow-up treatment protocols in research, being able to provide information about tumor progression after therapy.
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Affiliation(s)
- Liziane O F Monteiro
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renata S Fernandes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciano C Castro
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Valbert N Cardoso
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mônica C Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, USA
| | - Alice Ferretti
- Department of Nuclear Medicine, Molecular Imaging, Radiology, Neuro Radiology, Medical Physics, Clinical Laboratory, Microbiology & Pathology, Santa Maria de la Misericordia Hospital, Rovigo, Italy
| | - Domenico Rubello
- Department of Nuclear Medicine, Molecular Imaging, Radiology, Neuro Radiology, Medical Physics, Clinical Laboratory, Microbiology & Pathology, Santa Maria de la Misericordia Hospital, Rovigo, Italy.
| | - Elaine A Leite
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - André L B de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Pant K, Sedláček O, Nadar RA, Hrubý M, Stephan H. Radiolabelled Polymeric Materials for Imaging and Treatment of Cancer: Quo Vadis? Adv Healthc Mater 2017; 6. [PMID: 28218487 DOI: 10.1002/adhm.201601115] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/24/2016] [Indexed: 12/15/2022]
Abstract
Owing to their tunable blood circulation time and suitable plasma stability, polymer-based nanomaterials hold a great potential for designing and utilising multifunctional nanocarriers for efficient imaging and effective treatment of cancer. When tagged with appropriate radionuclides, they may allow for specific detection (diagnosis) as well as the destruction of tumours (therapy) or even customization of materials, aiming to both diagnosis and therapy (theranostic approach). This review provides an overview of recent developments of radiolabelled polymeric nanomaterials (natural and synthetic polymers) for molecular imaging of cancer, specifically, applying nuclear techniques such as positron emission tomography (PET) and single-photon emission computed tomography (SPECT). Different approaches to radiolabel polymers are evaluated from the methodical radiochemical point of view. This includes new bifunctional chelating agents (BFCAs) for radiometals as well as novel labelling methods. Special emphasis is given to eligible strategies employed to evade the mononuclear phagocytic system (MPS) in view of efficient targeting. The discussion encompasses promising strategies currently employed as well as emerging possibilities in radionuclide-based cancer therapy. Key issues involved in the clinical translation of radiolabelled polymers and future scopes of this intriguing research field are also discussed.
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Affiliation(s)
- Kritee Pant
- Helmholtz-Zentrum Dresden-Rossendorf; Institute of Radiopharmaceutical Cancer Research; Bautzner Landstraße 400 01328 Dresden Germany
| | - Ondřej Sedláček
- Institute of Macromolecular Chemistry; The Academy of Sciences of the Czech Republic; Heyrovského námeˇstí 2 16206 Prague 6 Czech Republic
| | - Robin A. Nadar
- Helmholtz-Zentrum Dresden-Rossendorf; Institute of Radiopharmaceutical Cancer Research; Bautzner Landstraße 400 01328 Dresden Germany
| | - Martin Hrubý
- Institute of Macromolecular Chemistry; The Academy of Sciences of the Czech Republic; Heyrovského námeˇstí 2 16206 Prague 6 Czech Republic
| | - Holger Stephan
- Helmholtz-Zentrum Dresden-Rossendorf; Institute of Radiopharmaceutical Cancer Research; Bautzner Landstraße 400 01328 Dresden Germany
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7
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Oda CMR, Fernandes RS, de Araújo Lopes SC, de Oliveira MC, Cardoso VN, Santos DM, de Castro Pimenta AM, Malachias A, Paniago R, Townsend DM, Colletti PM, Rubello D, Alves RJ, de Barros ALB, Leite EA. Synthesis, characterization and radiolabeling of polymeric nano-micelles as a platform for tumor delivering. Biomed Pharmacother 2017; 89:268-275. [PMID: 28235689 DOI: 10.1016/j.biopha.2017.01.144] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 01/25/2017] [Indexed: 10/20/2022] Open
Abstract
The use of nanoparticles for diagnostic approaches leads to higher accumulation in the targeting tissue promoting a better signal-to-noise ratio and consequently, early tumor detection through scintigraphic techniques. Such approaches have inherent advantages, including the possibility of association with a variety of gamma-emitting radionuclides available, among them, Tecnethium-99m (99mTc). 99mTc is readily conjugated with nanoparticles using chelating agents, such as diethylenetriaminepentaacetic acid (DTPA). Leveraging this approach, we synthesized polymeric micelles (PM) consisting of 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethyleneglycol)-2000] (DSPE-mPEG2000) functionalized with DTPA for radiolabeling with 99mTc. Micelles made up of DSPE-mPEG2000 and DSPE-PEG2000-DTPA had a mean diameter of ∼10nm, as measured by DLS and SAXS techniques, and a zeta potential of -2.7±1.1mV. Radiolabeled micelles exhibited high radiochemical yields and stability. In vivo assays indicated long blood circulation time (456.3min). High uptake in liver, spleen and kidneys was observed in the biodistribution and imaging studies on healthy and tumor-bearing mice. In addition, a high tumor-to-muscle ratio was detected, which increased over time, showing accumulation of the PM in the tumor region. These findings indicate that this system is a promising platform for simultaneous delivery of therapeutic agents and diagnostic probes.
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Affiliation(s)
- Caroline Mari Ramos Oda
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Renata Salgado Fernandes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Sávia Caldeira de Araújo Lopes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Mônica Cristina de Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Valbert Nascimento Cardoso
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Daniel Moreira Santos
- Department of Biochemistry and Imunology, Biological Science Institute, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Adriano Monteiro de Castro Pimenta
- Department of Biochemistry and Imunology, Biological Science Institute, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Angelo Malachias
- Department of Physics, Exact Sciences Institute, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Rogério Paniago
- Department of Physics, Exact Sciences Institute, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, United States
| | - Patrick M Colletti
- Department of Nuclear Medicine, University of Southern California, Los Angeles, CA, United States
| | - Domenico Rubello
- Department of Nuclear Medicine, Imaging and Clinical Pathology, Santa Maria della Misericordia Hospital, Rovigo, Italy.
| | - Ricardo José Alves
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - André Luís Branco de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Elaine Amaral Leite
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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Appelhans D, Klajnert-Maculewicz B, Janaszewska A, Lazniewska J, Voit B. Dendritic glycopolymers based on dendritic polyamine scaffolds: view on their synthetic approaches, characteristics and potential for biomedical applications. Chem Soc Rev 2015; 44:3968-96. [DOI: 10.1039/c4cs00339j] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The potential of dendritic glycopolymers based on dendritic polyamine scaffolds for biomedical applications is presented and compared with that of the structurally related anti-adhesive dendritic glycoconjugates.
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Affiliation(s)
- Dietmar Appelhans
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
| | - Barbara Klajnert-Maculewicz
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- 90-236 Lodz
- Poland
| | - Anna Janaszewska
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- 90-236 Lodz
- Poland
| | - Joanna Lazniewska
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- 90-236 Lodz
- Poland
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
- Organic Chemistry of Polymers
- Technische Universität Dresden
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Correa CR, de Barros ALB, Ferreira CDA, de Goes AM, Cardoso VN, de Andrade ASR. Aptamers directly radiolabeled with technetium-99m as a potential agent capable of identifying carcinoembryonic antigen (CEA) in tumor cells T84. Bioorg Med Chem Lett 2014; 24:1998-2001. [PMID: 24675379 DOI: 10.1016/j.bmcl.2014.02.048] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 02/13/2014] [Accepted: 02/18/2014] [Indexed: 12/20/2022]
Abstract
Aptamers are small oligonucleotides that are selected to bind with high affinity and specificity to a target molecule. Aptamers are emerging as a new class of molecules for radiopharmaceutical development. In this study a new method to radiolabel aptamers with technetium-99m ((99m)Tc) was developed. Two aptamers (Apt3 and Apt3-amine) selected against the carcinoembryonic antigen (CEA) were used. Labeling was done by the direct method and the developed complex was subjected to quality control tests. Radiochemical purity and stability were monitored by Thin Layer Chromatography. Binding and specificity assays were carried out in the T84 cell line (CEA+) to evaluate tumor affinity and specificity after radiolabeling. Aptamers were successfully labeled with (99m)Tc in high radiochemical yields, showing in vitro stability in presence of plasma and cystein. In binding assays the radiolabeled aptamer Apt3-amine showed the highest affinity to T84 cells. When evaluated with HeLa cells (CEA-), lower uptake was observed, suggesting high specificity for this aptamer. These results suggest that the Apt3-amine aptamer directly labeled with (99m)Tc could be considered a promising agent capable of identifying the carcinoembryonic antigen (CEA) present in tumor cells.
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Affiliation(s)
- Cristiane Rodrigues Correa
- Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil.
| | - André Luís Branco de Barros
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil
| | - Carolina de Aguiar Ferreira
- Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil
| | - Alfredo Miranda de Goes
- Departamento de Imunologia e Bioquímica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil
| | - Valbert Nascimento Cardoso
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil
| | - Antero Silva Ribeiro de Andrade
- Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Av. Antônio Carlos, 6627, Belo Horizonte 31270-091, Brazil
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