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Salvarese N, Morellato N, Gobbi C, Gandin V, De Franco M, Marzano C, Dolmella A, Bolzati C. Synthesis, characterization and in vitro cytotoxicity of gallium(III)-dithiocarbamate complexes. Dalton Trans 2024; 53:4526-4543. [PMID: 38348686 DOI: 10.1039/d3dt03552b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
A library of homoleptic mononuclear Ga(III) complexes of the general formula [Ga(DTC)3], where DTC is an alicyclic or a linear dithiocarbamate chelator, is reported. The complexes were prepared in high yields starting from Ga(NO3)3·6H2O and fully characterized by elemental analysis and IR and NMR spectroscopy. Crystals of five of these complexes were obtained. The antitumor activity of the newly synthesized compounds against a panel of human cancer cell lines was evaluated. The chemical nature of the DTC does not have a marked impact on the structural features of the final compound. X-ray crystal structure analyses revealed that all these complexes have a trigonal prismatic geometry with three identical chelating DTCs coordinating the Ga(III) ion. It is noteworthy that in complex 22, [Ga(NHEt)3] (NHEt = N-ethyldithiocarbamate), the asymmetric unit is formed by two independent and structurally different molecules. Cellular studies showed that all the synthesized Ga-DTC complexes exhibit marked cytotoxic activity, even against human colon cancer cells that are less sensitive to cisplatin. Among the tested compounds, 6 ([Ga(CEPipDTC)3], CEPipDTC = (ethoxycarbonyl)-piperidinedithiocarbamate) and 21 ([Ga(Pr-13)3], PR13 = 4 and N-(2-ethoxy-2-oxoethyl)-N-methyldithiocarbamate) are very promising derivatives, but they have no selectivity towards cancer cells. Nevertheless, the obtained data provide a foundation for developing gallium-dithiocarbamate complexes as anticancer agents.
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Affiliation(s)
- Nicola Salvarese
- Consiglio Nazionale delle Ricerche - Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (CNR-ICMATE), Corso Stati Uniti 4, 35127 Padua, Italy.
| | - Nicolò Morellato
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via F. Marzolo 5, 35131 Padua, Italy
| | - Carolina Gobbi
- Consiglio Nazionale delle Ricerche - Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (CNR-ICMATE), Corso Stati Uniti 4, 35127 Padua, Italy.
| | - Valentina Gandin
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via F. Marzolo 5, 35131 Padua, Italy
| | - Michele De Franco
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via F. Marzolo 5, 35131 Padua, Italy
| | - Cristina Marzano
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via F. Marzolo 5, 35131 Padua, Italy
| | - Alessandro Dolmella
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via F. Marzolo 5, 35131 Padua, Italy
| | - Cristina Bolzati
- Consiglio Nazionale delle Ricerche - Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (CNR-ICMATE), Corso Stati Uniti 4, 35127 Padua, Italy.
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Feng J, Zhang X, Jiang Y, Ruan Q, Wang Q, Zhang J. Preparation and Bioevaluation of a Novel 99mTc-Labeled Glucose Derivative Containing Cyclohexane as a Promising Tumor Imaging Agent. Pharmaceuticals (Basel) 2023; 16:ph16040612. [PMID: 37111368 PMCID: PMC10144323 DOI: 10.3390/ph16040612] [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: 03/05/2023] [Revised: 04/06/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
To develop novel tumor imaging agents with high tumor uptake and excellent tumor/non-target ratios, a glucose derivative containing cyclohexane (CNMCHDG) was synthesized and labeled with Tc-99m. [99mTc]Tc-CNMCHDG was prepared by a kit formulation that was straightforward to operate and fast. Without purification, [99mTc]Tc-CNMCHDG had a high radiochemical purity of over 95% and great in vitro stability and hydrophilicity (log P = -3.65 ± 0.10). In vitro cellular uptake studies showed that the uptake of [99mTc]Tc-CNMCHDG was significantly inhibited by pre-treatment with D-glucose and increased by pre-treatment with insulin. Preliminary cellular studies have demonstrated that the mechanism by which the complex enters into cells may be related to GLUTs. The results of biodistribution and SPECT imaging studies displayed high tumor uptake and good retention of [99mTc]Tc-CNMCHDG in A549 tumor-bearing mice (4.42 ± 0.36%ID/g at 120 min post-injection). Moreover, [99mTc]Tc-CNMCHDG exhibited excellent tumor-to-non-target ratios and a clean imaging background and is a potential candidate for clinical transformation.
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Affiliation(s)
- Junhong Feng
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xuran Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yuhao Jiang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Qing Ruan
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Qianna Wang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China
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Gan Q, Zhang X, Ruan Q, Fang S, Zhang J. 99mTc-CN7DG: A Highly Expected SPECT Imaging Agent of Cancer with Satisfactory Tumor Uptake and Tumor-to-Nontarget Ratios. Mol Pharm 2021; 18:1356-1363. [PMID: 33586982 DOI: 10.1021/acs.molpharmaceut.0c01177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel glucose derivative (CN7DG) possessing an isonitrile as a coordinating group was synthesized, and 99mTc-CN7DG, which was expected to be a powerful tumor imaging agent for SPECT, was prepared in a kit by the reaction of CN7DG with SnCl2·2H2O and 99mTcO4-. 99mTc-CN7DG exhibited good stability and was transported via glucose transporters. Biodistribution results in mice bearing A549 tumor models showed that 99mTc-CN7DG had a higher uptake at the tumor sites and better tumor/blood and tumor/muscle ratios than did [18F]FDG and 99mTc-CN5DG. SPECT/CT imaging studies showed obvious accumulation in tumor sites, suggesting that 99mTc-CN7DG is a promising candidate for tumor imaging. Because 99mTc and 188Re stand for a "theranostic pair", 188Re-CN7DG is expected to be prepared as a promising agent for tumor therapy.
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Affiliation(s)
- Qianqian Gan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Xuran Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Qing Ruan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Si'an Fang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
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Zhang X, Gan Q, Ruan Q, Xiao D, Zhang J. Evaluation and comparison of
99m
Tc‐labeled
d
‐glucosamine derivatives with different
99m
Tc cores as potential tumor imaging agents. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xuran Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry Beijing Normal University Beijing 100875 China
| | - Qianqian Gan
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry Beijing Normal University Beijing 100875 China
| | - Qing Ruan
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry Beijing Normal University Beijing 100875 China
| | - Di Xiao
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry Beijing Normal University Beijing 100875 China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry Beijing Normal University Beijing 100875 China
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Zhang X, Ruan Q, Jiang Y, Gan Q, Zhang J. Evaluation of 99mTc-CN5DG as a broad-spectrum SPECT probe for tumor imaging. Transl Oncol 2020; 14:100966. [PMID: 33246288 PMCID: PMC7701264 DOI: 10.1016/j.tranon.2020.100966] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 11/30/2022] Open
Abstract
Previously, we reported a [99mTc(ǀ)]+ labeled d-glucoamine derivative (99mTc-CN5DG) and evaluated it as a tumor imaging agent in mice bearing A549 tumor xenografts. In this paper, 99mTc-CN5DG was further studied in U87 MG (human glioma cells), HCT-116 (human colon cancer cells), PANC-1 (human pancreatic cancer cells) and TE-1 (human esophageal cancer cells) tumor xenografts models to verify its potential application for imaging of different kinds of tumors. The biodistribution data showed that 99mTc-CN5DG had a similar biodistribution pattern in four tumor models at 2 h post-injection with high accumulation in tumors and kidneys. The tumor/muscle ratios (from 4.08 ± 0.42 to 9.63 ± 3.53) and tumor/blood ratios (from 17.18 ± 7.40 to 53.17 ± 16.16) of 99mTc-CN5DG in four tumor models were high. All four kinds of tumors could be clearly seen on their corresponding SPECT/CT images. Pharmacokinetic study in healthy CD-1 mice demonstrated that 99mTc-CN5DG cleared fast from blood (2 min, 12.97 ± 0.88%ID/g; 60 min, 0.33 ± 0.06%ID/g) and the blood distribution, elimination half-life was 5.81 min and 21.16 min, respectively. No abnormality was observed through the abnormal toxicity study. All of the above results demonstrated that 99mTc-CN5DG could be a broad-spectrum SPECT probe for tumor imaging and its further clinical application is warranted.
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Affiliation(s)
- Xuran Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Qing Ruan
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Yuhao Jiang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Qianqian Gan
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, PR China.
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Gan Q, Song X, Zhang X, Zhang J. Preparation and evaluation of 99mTc-labeled HYNIC-palbociclib analogs for cyclin-dependent kinase 4/6-positive tumor imaging. Eur J Med Chem 2020; 188:112032. [PMID: 31926467 DOI: 10.1016/j.ejmech.2019.112032] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/24/2019] [Accepted: 12/31/2019] [Indexed: 12/16/2022]
Abstract
Overexpression and amplification of cyclin-dependent kinase 4/6 (CDK4/6) occur in many cancers and may be the cause of resistance to CDK4/6 inhibitors in preclinical models. However, there are few investigations on the assessment of CDK4/6 expression in tumors or other tissues. Palbociclib, which was approved in 2015 to treat ER+/HER2-breast cancer in combination with letrozole, is a selective CDK4/6 inhibitor. In this study, an intermediate (compound 3), which could be hydrolyzed into the ligand (compound L) consisting of palbociclib as the bioactive molecule and 6-hydrazino nicotinamide (HYNIC) as the bifunctional chelator, was synthesized. Compound L was radiolabeled with 99mTc using tricine/TPPTS or tricine/TPPMS as co-ligands. 99mTc-tricine-TPPTS-L and 99mTc-tricine-TPPMS-L were prepared with high radiochemical purity without postlabeling purification. They had great in vitro stability. Both radiotracers were hydrophilic, but 99mTc-tricine-TPPTS-L had a lower log P value. In vitro cell uptake studies in MCF-7 cells showed that cellular uptake was blocked by preincubation with palbociclib, suggesting a CDK4/6-mediated uptake mechanism. Biodistribution in mice bearing MCF-7 tumors showed that 99mTc-tricine-TPPTS-L had higher tumor uptake than 99mTc-tricine-TPPMS-L, while they had comparable tumor-to-muscle and tumor-to-blood ratios. Radioactivity accumulation in tumors was obvious in micro-SPECT/CT images with 99mTc-tricine-TPPTS-L. When mice were preinjected with palbociclib, tumor uptake of 99mTc-tricine-TPPTS-L significantly decreased and the tumor accumulation was clearly lost, confirming CDK4/6 specificity. All results in this work indicated that 99mTc-tricine-TPPTS-L is a promising tumor imaging agent that targets CDK4/6.
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Affiliation(s)
- Qianqian Gan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, PR China
| | - Xiaoqing Song
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, PR China
| | - Xuran Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, PR China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, PR China.
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Song X, Gan Q, Zhang X, Zhang J. Synthesis and Biological Evaluation of Novel 99mTc-Labeled Palbociclib Derivatives Targeting Cyclin-Dependent Kinase 4/6 (CDK4/6) as Potential Cancer Imaging Agents. Mol Pharm 2019; 16:4213-4222. [PMID: 31424939 DOI: 10.1021/acs.molpharmaceut.9b00540] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cancer results from cell proliferation that exceeds normal growth control. There are various specific proteins that control and regulate the cell cycle, such as cyclin-dependent kinases (CDKs), cyclins, and retinoblastoma protein (pRb). The aberration of the cyclin D-CDK4/6-INK4-pRb pathway occurs frequently in cancers; thus, CDK4/6 is an attractive target for the development of radiopharmaceuticals for tumor imaging. In this study, we chose palbociclib, which was approved by the FDA for treating ER+/HER2- advanced breast cancer as the target vector and the isonitrile group, which can coordinate strongly with the [99mTc(CO)3]+ core as the bifunctional chelator, to develop four novel 99mTc-labeled radiotracers for tumor imaging. The ligands (L2, L3, L4, and L5) were synthesized by reacting palbociclib with isocyanide-containing active esters and then radiolabeling with a [99mTc(CO)3]+ core to produce radiotracers (99mTc-L2, 99mTc-L3, 99mTc-L4, and 99mTc-L5) with high radiochemical purity (>95%) and good stability in vitro. The structures of the 99mTc complexes were identified by preparation and characterization of the corresponding stable rhenium complexes. Partition coefficient results indicated that these complexes were lipophilic. A kinase inhibition assay demonstrated the high affinity of the stable Re complexes for CDK4. A cell study showed that all four complexes had substantial uptake by MCF-7 cells and could be significantly inhibited by palbociclib and nonradiolabeled ligand, indicating a CDK4/6-specific uptake mechanism. Biodistribution studies in nude mice bearing MCF-7 tumors showed that the complexes had obvious accumulation in tumors at 2 h postinjection. 99mTc-L2 exhibited the highest tumor uptake and tumor/blood ratio, whereas 99mTc-L4 showed the highest tumor/muscle ratio. The micro-SPECT/CT study showed that complex 99mTc-L4 had visible uptake at the tumor site, and the accumulation was clearly reduced in the image after pretreatment with palbociclib, further indicating CDK4/6 specificity. All the results showed that the 99mTc-labeled complexes in this work have the potential for tumor imaging.
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Affiliation(s)
- Xiaoqing Song
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China
| | - Qianqian Gan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China
| | - Xuran Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China
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Ding J, Su H, Wang F, Chu T. A pre-targeting strategy for imaging glucose metabolism using technetium-99m labelled dibenzocyclooctyne derivative. Bioorg Med Chem Lett 2019; 29:1791-1798. [PMID: 31101473 DOI: 10.1016/j.bmcl.2019.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/25/2019] [Accepted: 05/07/2019] [Indexed: 12/22/2022]
Abstract
During the last four decades, nuclear medicine has undergone enormous growth, and positron emission tomography (PET) has been in the driving seat for most of the time. 18F-fluorodeoxyglucose (18F-FDG) is the most widely used agent for the detection of hibernating myocardium and metabolically active cancer tissue. But its cost and limited availability are the main limitations. For a long time different researchers and groups of pharmacists have tried to label glucose with a cheaper and long-acting radionuclide like 99mTc. However, they failed to achieve this goal owing to the chemical complexity of 99mTc and the lack of maintaining the physiological activity of diagnostic compounds. A pre-targeting strategy based on strain-promoted [3 + 2] azide-alkyne cycloaddition (SPAAC) reaction was applied to solve this problem. Functional click synthons were synthesized: 2-azido-2-deoxy-d-glucose (GlucN3) as a glucose analogue, and N- (2- (2- (2- (bis (pyridin-2-ylmethyl) amino) ethoxy) ethoxy) ethyl-2- (6H-11,12-didehydrodibenzo [a,e] cycloocten-5-ylideneaminooxy) acetamide (C7) as a 99mTc(CO)3 labeling and azido-binding group. The results of biodistribution experiments in mice bearing S180 tumor show the relatively high tumor/blood ratio (up to 2.95) and tumor/muscle ratio (up to 6.37), and both of them decreases significantly in the glucose blocking experiment. It indicates that GlucN3 behaves similarly to glucose and that in vivo SPAAC reactions can occur effectively. It is supposed that this pre-targeting strategy can indeed enhance target specificity and may be used for glucose metabolism imaging in tumor diagnosis.
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Affiliation(s)
- Jin Ding
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Hang Su
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Fan Wang
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Taiwei Chu
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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Zhang X, Ruan Q, Duan X, Gan Q, Song X, Fang S, Lin X, Du J, Zhang J. Novel 99mTc-Labeled Glucose Derivative for Single Photon Emission Computed Tomography: A Promising Tumor Imaging Agent. Mol Pharm 2018; 15:3417-3424. [PMID: 29985620 DOI: 10.1021/acs.molpharmaceut.8b00415] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, a d-glucosamine derivative with an isonitrile group (CN5DG) was synthesized and it was chosen to coordinate with 99mTc for preparing 99mTc-CN5DG. 99mTc-CN5DG could be readily obtained with high radiochemical purity (>95%) and had great in vitro stability and metabolic stability in urine. The radiotracer demonstrated a positive response to the administration of glucose and insulin in S180 and A549 tumor cells in vitro, suggesting the mechanism of 99mTc-CN5DG into tumor cells was related to glucose transporters. Biodistribution studies in mice bearing A549 xenografts showed 99mTc-CN5DG had a high tumor uptake and high tumor-to-background ratios. SPECT/CT images further supported its ability for tumor imaging. As a cheap, conveniently made and widely available probe, 99mTc-CN5DG would become a potential "working horse" and be a breakthrough in 99mTc-labeled radiopharmaceuticals for tumor detection.
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Affiliation(s)
- Xuran Zhang
- Department of Isotopes , China Institute of Atomic Energy , P.O. Box 2108 , Beijing 102413 , China
| | | | | | | | | | | | | | - Jin Du
- Department of Isotopes , China Institute of Atomic Energy , P.O. Box 2108 , Beijing 102413 , China
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Song X, Wang Y, Zhang J. Influence of different 99mTc cores on the physicochemical and biodistribution behaviours of 99mTc-labelled complexes of pamidronate dithiocarbamate. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5727-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Song X, Wang Y, Zhang J, Jin Z, Zhang W, Zhang Y. Synthesis and evaluation of a novel 99m Tc nitrido radiopharmaceutical with alendronate dithiocarbamate as a potential bone-imaging agent. Chem Biol Drug Des 2017; 91:545-551. [PMID: 28994250 DOI: 10.1111/cbdd.13117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/28/2017] [Accepted: 10/04/2017] [Indexed: 11/30/2022]
Abstract
Currently, a popular strategy for designing novel radioprobes as bone-imaging agents is based on the concept of bifunctional radiopharmaceuticals. Considering the dithiocarbamate ligand can act as a suitable bifunctional linking agent to attach technetium-99m (99m Tc) to corresponding target molecules, in this study, alendronate dithiocarbamate (ALNDTC) was synthesized and radiolabeled with [99m Tc≡N]2+ core by ligand exchange reaction to produce 99m TcN-ALNDTC complex, for the potential use as a novel probe for bone imaging. The radiochemical purity of the complex was over 90%. The complex was stable in vitro and could bind to hydroxyapatite. The partition coefficient result indicated it was hydrophilic, and an evaluation of biodistribution in mice indicated that the complex exhibited a higher bone uptake than did 99m Tc-labeled methylenediphosphonate (99m Tc-MDP). Further, single photon emission computed tomography imaging study indicated clear accumulation in bone, suggesting that 99m TcN-ALNDTC would be a promising candidate for bone imaging.
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Affiliation(s)
- Xiaoqing Song
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China
| | - Yue Wang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China
| | - Zhonghui Jin
- Nuclear Medicine Department, Peking University 3rd Hospital, Beijing, China
| | - Weifang Zhang
- Nuclear Medicine Department, Peking University 3rd Hospital, Beijing, China
| | - Yanyan Zhang
- Nuclear Medicine Department, Peking University 3rd Hospital, Beijing, China
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