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Saednia S, Emami S, Moslehi M, Hosseinimehr SJ. Insights into the development of 99mTc-radioligands for serotonergic receptors imaging: Synthesis, labeling, In vitro, and In vivo studies. Eur J Med Chem 2024; 270:116349. [PMID: 38555856 DOI: 10.1016/j.ejmech.2024.116349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/02/2024]
Abstract
Serotonergic (5-hydroxytryptamine; 5-HT) receptors play critical roles in neurological and psychological disorders such as schizophrenia, anxiety, depression, and Alzheimer's diseases. Therefore, it is particularly important to develop novel radioligands or modify the existing ones to identify the serotonergic receptors involved in psychiatric disorders. Among the 16 subtypes of serotonergic systems, only technetium-99m based radiopharmaceuticals have been evaluated for serotonin-1A (5-HT1A), serotonin-2A (5-HT2A), 5-HT1A/7 heterodimers and serotonin receptor neurotransmitter (SERT). This review focuses on recent efforts in the design, synthesis and evaluation of 99mTc-radioligands used for single photon emission computerized tomography (SPECT) imaging of serotonergic (5-HT) receptors. Additionally, the discussion will cover aspects such as chemical structure, in vitro/vivo stability, affinity toward serotonin receptors, blood-brain barrier permeation (BBB), and biodistribution study.
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Affiliation(s)
- Shahnaz Saednia
- Farabi Hospital, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeed Emami
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Masoud Moslehi
- Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Seyed Jalal Hosseinimehr
- Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran.
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2
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Kumari N, Kaul A, Varshney R, Singh VK, Srivastava K, Bhagat S, Mishra AK, Tiwari AK. Synthesis and evaluation of technetium-99m labelled 1-(2-methoxyphenyl)piperazine derivative for single photon emission computed tomography imaging for targeting 5-HT 1A. Bioorg Chem 2021; 111:104972. [PMID: 33993020 DOI: 10.1016/j.bioorg.2021.104972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/17/2021] [Accepted: 05/04/2021] [Indexed: 10/21/2022]
Abstract
Quantitative changes in expression level of 5HT1A are somewhere related to common neurological disorders such as anxiety, major depression and schizophrenia. We have designed EDTA conjugated SPECT imaging probe for localization of 5HT1A receptor in brain. For designing SPECT probe we have employed the concept of bivalent approach and a homodimeric system with desirable pharmacokinetics of 5HT1A imaging. 99mTc-EDHT was also evaluated for its stability through serum stability assay and glutathione challenge experiment. Biodistribution study showed the highest accumulation of radioactivity in kidney which depicted the renal mode of excretion from the body. However in brain the uptake of 1.21% ID per gram was observed in initial 5 min of drug administration. On blocking the receptor this percent get decreased to 0.97% ID per gram. The regional distribution in brain was also performed which showed the accumulation of drug in cerebellum, cortex and hippocampus part, which are already known for 5HT1A expression. Dynamic study in rabbit is also in support of results derived from biodistribution and blood kinetics experiment. These finding suggest that 99mTc-EDHT holds promising place for further optimization before nuclear medicine applications in different animal species.
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Affiliation(s)
- Neelam Kumari
- Department of Chemistry, School of Physical & Decision Sciences (SPDS), Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow 226025, UP, India; Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi 110054, India; Department of Chemistry, University of Delhi, Delhi 110054, India
| | - Ankur Kaul
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi 110054, India
| | - Raunak Varshney
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi 110054, India
| | - Vinay Kumar Singh
- Department of Chemistry, Dr. S.M.N.R University, Lucknow 226018, India
| | - Krishna Srivastava
- Faculty of Chemical Sciences, Shri Ramswaroop Memorial University, Lucknow 225003, UP, India
| | - Sunita Bhagat
- Department of Chemistry, University of Delhi, Delhi 110054, India
| | - Anil Kumar Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi 110054, India
| | - Anjani Kumar Tiwari
- Department of Chemistry, School of Physical & Decision Sciences (SPDS), Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow 226025, UP, India; Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi 110054, India.
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Häseli S, Holy M, Joksch M, Bergner C, Wree A, Kurth J, Cankaya A, Piel M, Krause BJ, Sitte HH, Rösch F. 68 Ga-Labelled Tropane Analogues for the Visualization of the Dopaminergic System. ChemMedChem 2021; 16:804-808. [PMID: 33245194 PMCID: PMC7984292 DOI: 10.1002/cmdc.202000820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Indexed: 02/04/2023]
Abstract
The development of radiometal-labelled pharmaceuticals for neuroimaging could offer great potential due to easier handling during labelling and availability through radionuclide generator systems. Nonetheless, to date, no such tracers are available for positron emission tomography, primarily owing to the challenge of crossing the blood-brain barrier (BBB) and loss of affinity through chelator attachment. We have prepared a variety of 68 Ga-labelled phenyltropanes showing that, through a simple hydrocarbon-linker, it is possible to introduce a chelator onto the lead structure while maintaining its high affinity for hDAT (human dopamine transporter) and simultaneously achieving adequate lipophilicity. One of the candidates, [68 Ga]Ga-HBED-hexadiyne-tropane, showed an IC50 value of 66 nM, together with a log D7.4 of 0.96. A μPET study in a hemi-parkinsonian rat model showed a fast wash-out of the tracer, and no specific uptake in the brain, thus implying an inability to penetrate the BBB.
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Affiliation(s)
- Sascha Häseli
- Institute of Nuclear ChemistryJohannes Gutenberg-University MainzFritz-Strassmann-Weg 255128MainzGermany
| | - Marion Holy
- Institute of Pharmacology (Center for Physiology and Pharmacology)Medical University of ViennaWähringer Straße 13a1090WienAustria
| | - Markus Joksch
- Department of Nuclear MedicineRostock University Medical CenterGertrudenplatz 118057RostockGermany
| | - Carina Bergner
- Department of Nuclear MedicineRostock University Medical CenterGertrudenplatz 118057RostockGermany
| | - Andreas Wree
- Institute of AnatomyRostock University Medical CenterGertrudenstraße 918057RostockGermany
| | - Jens Kurth
- Department of Nuclear MedicineRostock University Medical CenterGertrudenplatz 118057RostockGermany
| | - Aylin Cankaya
- Institute of Nuclear ChemistryJohannes Gutenberg-University MainzFritz-Strassmann-Weg 255128MainzGermany
| | - Markus Piel
- Institute of Nuclear ChemistryJohannes Gutenberg-University MainzFritz-Strassmann-Weg 255128MainzGermany
| | - Bernd J. Krause
- Department of Nuclear MedicineRostock University Medical CenterGertrudenplatz 118057RostockGermany
| | - Harald H. Sitte
- Institute of Pharmacology (Center for Physiology and Pharmacology)Medical University of ViennaWähringer Straße 13a1090WienAustria
| | - Frank Rösch
- Institute of Nuclear ChemistryJohannes Gutenberg-University MainzFritz-Strassmann-Weg 255128MainzGermany
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Anju, Chaturvedi S, Chaudhary V, Pant P, Jha P, Kumaran SS, Hussain F, Kumar Mishra A. 5-HT 1A targeting PARCEST agent DO3AM-MPP with potential for receptor imaging: Synthesis, physico-chemical and MR studies. Bioorg Chem 2020; 106:104487. [PMID: 33339667 DOI: 10.1016/j.bioorg.2020.104487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 11/17/2020] [Indexed: 10/22/2022]
Abstract
Contrast enhancement in MRI using magnetization or saturation transfer techniques promises better sensitivity, and faster acquisition compared to T1 or T2 contrast. This work reports the synthesis and evaluation of 5-HT1A targeted PARACEST MRI contrast agent using 1,4,7,10-tetraazacycloDOdecane-4,7,10-triacetAMide (DO3AM) as the bifunctional chelator, and 5-HT1A-antagonist methoxyphenyl piperazine (MPP) as a targeting unit. The multi-step synthesis led to the MPP conjugated DO3AM with 60% yield. CEST-related physicochemical parameters were evaluated after loading DO3AM-MPP with paramagnetic MRI active lanthanides: Gadolinium (Gd-DO3AM-MPP) and Europium (Eu-DO3AM-MPP). Luminescence lifetime measurements with Eu-DO3AM-MPP and computational DFT studies using Gd-DO3AM-MPP revealed the coordination of one water molecule (q = 1.43) with metal-water distance (rM-H2O) of 2.7 Å and water residence time (τm) of 0.23 ms. The dissociation constant of Kd 62 ± 0.02 pM as evaluated from fluorescence quenching of 5-HT1A (protein) and docking score of -4.81 in theoretical evaluation reflect the binding potential of the complex Gd-DO3AM-MPP with the receptor 5-HT1A. Insights of the docked pose reflect the importance of NH2 (amide) and aromatic ring in Gd-DO3AM-MPP while interacting with Ser 374 and Phe 370 in the antagonist binding pocket of 5-HT1A. Gd-DO3AM-MPP shows longitudinal relaxivity 5.85 mM-1s-1 with a water residence lifetime of 0.93 ms in hippocampal homogenate containing 5-HT1A. The potentiometric titration of DO3AM-MPP showed strong selectivity for Gd3+ over physiological metal ions such as Zn2+ and Cu2+. The in vitro and in vivo studies confirmed the minimal cytotoxicity and presential binding of Gd-DO3AM-MPP with 5-HT1A receptor in the hippocampus region of the mice. Summarizing, the complex Gd-DO3AM-MPP can have a potential for CEST imaging of 5-HT1A receptors.
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Affiliation(s)
- Anju
- Department of Chemistry, University of Delhi, North Campus, Delhi 110007, India; Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig. S. K Mazumdar Road, Timarpur, Delhi 110054, India
| | - Shubhra Chaturvedi
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig. S. K Mazumdar Road, Timarpur, Delhi 110054, India.
| | - Vishakha Chaudhary
- Department of Chemistry, University of Delhi, North Campus, Delhi 110007, India; Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig. S. K Mazumdar Road, Timarpur, Delhi 110054, India
| | - Pradeep Pant
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Preeti Jha
- Department of Immunology, Genetics and Pathology, Uppsala University, 75185 Uppsala, Sweden
| | - Senthil S Kumaran
- All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - Firasat Hussain
- Department of Chemistry, University of Delhi, North Campus, Delhi 110007, India
| | - Anil Kumar Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig. S. K Mazumdar Road, Timarpur, Delhi 110054, India.
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Chaturvedi S, Hazari PP, Kaul A, Mishra AK. Microenvironment Stimulated Bioresponsive Small Molecule Carriers for Radiopharmaceuticals. ACS OMEGA 2020; 5:26297-26306. [PMID: 33110957 PMCID: PMC7581084 DOI: 10.1021/acsomega.0c03601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
The widespread and successful use of radiopharmaceuticals in diagnosis, treatment, and therapeutic monitoring of cancer and other ailments has spawned significant literature. The transition from untargeted to targeted radiopharmaceuticals reflects the various stages of design and development. Targeted radiopharmaceuticals bind to specific biomarkers, get fixed, and highlight the disease site. A new subset of radioprobes, the bioresponsive radiopharmaceuticals, has been developed in recent years. These probes generally benefit from signal enhancement after undergoing molecular changes due to the fluctuations in the environment (pH, redox, or enzymatic activity) at the site of interest. This review presents a comprehensive overview of bioresponsive radioimaging probes covering the basis, application, and scope of development.
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Swastika, Chaturvedi S, Kaul A, Hazari PP, Jha P, Pal S, Lal S, Singh B, Barthélémy P, Mishra AK. Evaluation of BBB permeable nucleolipid (NLDPU): A di-C15-ketalised palmitone appended uridine as neuro-tracer for SPECT. Int J Pharm 2019; 565:269-282. [DOI: 10.1016/j.ijpharm.2019.04.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 04/16/2019] [Accepted: 04/27/2019] [Indexed: 12/17/2022]
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Jha P, Chaturvedi S, Kaul A, Pant P, Anju A, Pal S, Jain N, Mishra AK. Design, physico-chemical and pre-clinical evaluation of a homo-bivalent 99mTc-(BTZ)2DTPA radioligand for targeting dimeric 5-HT1A/5-HT7 receptors. NEW J CHEM 2018. [DOI: 10.1039/c8nj00089a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A 99mTc-labelled bis-benzothiazolone-DTPA radio-complex as a SPECT neuroimaging agent.
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Affiliation(s)
- Preeti Jha
- Department of Chemistry
- Indian Institute of Technology Delhi (IITD)
- India
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
| | - Shubhra Chaturvedi
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Defence Research and Development Organization
- Delhi-110054
- India
| | - Ankur Kaul
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Defence Research and Development Organization
- Delhi-110054
- India
| | - Pradeep Pant
- Department of Chemistry
- Indian Institute of Technology Delhi (IITD)
- India
| | - Anju Anju
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Defence Research and Development Organization
- Delhi-110054
- India
| | - Sunil Pal
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Defence Research and Development Organization
- Delhi-110054
- India
| | - Nidhi Jain
- Department of Chemistry
- Indian Institute of Technology Delhi (IITD)
- India
| | - Anil K. Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Defence Research and Development Organization
- Delhi-110054
- India
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Hazari PP, Pandey A, Chaturvedi S, Mishra AK. New Trends and Current Status of Positron-Emission Tomography and Single-Photon-Emission Computerized Tomography Radioligands for Neuronal Serotonin Receptors and Serotonin Transporter. Bioconjug Chem 2017; 28:2647-2672. [PMID: 28767225 DOI: 10.1021/acs.bioconjchem.7b00243] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The critical role of serotonin (5-hydroxytryptamine; 5-HT) and its receptors (5-HTRs) in the pathophysiology of diverse neuropsychiatric and neurodegenerative disorders render them attractive diagnostic and therapeutic targets for brain disorders. Therefore, the in vivo assessment of binding of 5-HT receptor ligands under a multitude of physiologic and pathologic scenarios may support more-accurate identification of disease and its progression and the patient's response to therapy as well as the screening of novel therapeutic strategies. The present Review aims to focus on the current status of radioligands used for positron-emission tomography (PET) and single-photon-emission computerized tomography (SPECT) imaging of human brain serotonin receptors. We further elaborate upon and emphasize the attributes that qualify a radioligand for theranostics on the basis of its frequency of use in clinics, its benefit to risk assessment in humans, and its continuous evolution, along with the major limitations.
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Affiliation(s)
- Puja Panwar Hazari
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences , Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Ankita Pandey
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences , Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Shubhra Chaturvedi
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences , Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Anil Kumar Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences , Brig S.K. Mazumdar Road, Delhi 110054, India
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