1
|
Uzuegbunam BC, Li J, Paslawski W, Weber W, Svenningsson P, Ågren H, Yousefi BH. Toward Novel [18F]Fluorine-Labeled Radiotracers for the Imaging of α-Synuclein Fibrils. Front Aging Neurosci 2022; 14:830704. [PMID: 35572127 PMCID: PMC9099256 DOI: 10.3389/fnagi.2022.830704] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/27/2022] [Indexed: 12/05/2022] Open
Abstract
The accumulation of α-synuclein aggregates (α-syn) in the human brain is an occurrence common to all α-synucleinopathies. Non-invasive detection of these aggregates in a living brain with a target-specific radiotracer is not yet possible. We have recently discovered that the inclusion of a methylenedioxy group in the structure of diarylbisthiazole (DABTA)-based tracers improves binding affinity and selectivity to α-syn. Subsequently, complementary in silico modeling and machine learning (ML) of tracer–protein interactions were employed to predict surface sites and structure–property relations for the binding of the ligands. Based on this observation, we developed a small focused library of DABTAs from which 4-(benzo[d][1,3]dioxol-5-yl)-4′-(3-[18F]fluoro-4-methoxyphenyl)-2,2′-bithiazole [18F]d2, 6-(4′-(3-[18F]fluoro-4-methoxyphenyl)-[2,2′-bithiazol]-4-yl)-[1,3]dioxolo[4,5-b]pyridine [18F]d4, 4-(benzo [d][1,3]dioxol-5-yl)-4′-(6-[18F]fluoropyridin-3-yl)-2,2′-bithiazole [18F]d6, and 6-(4′-(6-[18F]fluoropyridin-3-yl)-[2,2′-bithiazol]-4-yl)-[1,3]dioxolo[4,5-b]pyridine [18F]d8 were selected based on their high binding affinity to α-syn and were further evaluated. Binding assay experiments carried out with the non-radioactive versions of the above tracers d2, d4, d6, and d8 showed high binding affinity of the ligands to α-syn: 1.22, 0.66, 1.21, and 0.10 nM, respectively, as well as excellent selectivity over β-amyloid plaques (Aβ) and microtubular tau aggregates (>200-fold selectivity). To obtain the tracers, their precursors were radiolabeled either via an innovative ruthenium-mediated (SNAr) reaction ([18F]d2 and [18F]d4) or typical SNAr reaction ([18F]d6 and [18F]d8) with moderate-to-high radiochemical yields (13% – 40%), and high molar activity > 60 GBq/μmol. Biodistribution experiments carried out with the tracers in healthy mice revealed that [18F]d2 and [18F]d4 showed suboptimal brain pharmacokinetics: 1.58 and 4.63 %ID/g at 5 min post-injection (p.i.), and 1.93 and 3.86 %ID/g at 60 min p.i., respectively. However, [18F]d6 and [18F]d8 showed improved brain pharmacokinetics: 5.79 and 5.13 %ID/g at 5 min p.i.; 1.75 and 1.07 %ID/g at 60 min p.i.; and 1.04 and 0.58 %ID/g at 120 min p.i., respectively. The brain uptake kinetics of [18F]d6 and [18F]d8 were confirmed in a dynamic PET study. Both tracers also showed no brain radiometabolites at 20 min p.i. in initial in vivo stability experiments carried out in healthy mice. [18F]d8 seems very promising based on its binding properties and in vivo stability, thus encouraging further validation of its usefulness as a radiotracer for the in vivo visualization of α-syn in preclinical and clinical settings. Additionally, in silico and ML-predicted values correlated with the experimental binding affinity of the ligands.
Collapse
Affiliation(s)
| | - Junhao Li
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - Wojciech Paslawski
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Wolfgang Weber
- Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
| | - Per Svenningsson
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Hans Ågren
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - Behrooz Hooshyar Yousefi
- Department of Nuclear Medicine, Philipps University of Marburg, Marburg, Germany
- *Correspondence: Behrooz Hooshyar Yousefi,
| |
Collapse
|
2
|
Allian AD, Tjahjono M, Garland M. Reaction of Alkynes with Rh4(CO)12. A Mid-Infrared Vibrational and Kinetic Study of (μ4-η2-alkyne)Rh4(CO)8(μ-CO)2. Organometallics 2006. [DOI: 10.1021/om0510019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayman D. Allian
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| | - Martin Tjahjono
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| | - Marc Garland
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| |
Collapse
|
3
|
Hwang SF, Chi Y, Chiang SJ, Peng SM, Lee GH. Syntheses and Reactivity Studies of the Carbido-Alkylidyne Cluster Complexes LWRu4(μ5-C)(μ-CPh)(CO)12 and LWRu5(μ6-C)(μ-CPh)(CO)14, L = Cp and Cp*, Obtained from Reversible Scission of Acetylide Ligand. Organometallics 2000. [DOI: 10.1021/om000801a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shu-Fen Hwang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Yun Chi
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Shun-Jean Chiang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Shie-Ming Peng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Gene-Hsiang Lee
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| |
Collapse
|
4
|
Youngs WJ, Tessier CA, Bradshaw JD. ortho-Arene Cyclynes, Related Heterocyclynes, and Their Metal Chemistry. Chem Rev 1999; 99:3153-80. [PMID: 11749513 DOI: 10.1021/cr9902446] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- W J Youngs
- Department of Chemistry, The University of Akron, Akron, Ohio 44325-3601
| | | | | |
Collapse
|
5
|
Liu G, Garland M. Liquid-Phase Reaction of Monosubstituted and Disubstituted Alkynes with Tetrarhodium Dodecacarbonyl under CO and CO/H2 Mixtures. In-Situ IR Spectroscopic Characterization of 20 New Alkyne−Rhodium Complexes. Organometallics 1999. [DOI: 10.1021/om9900869] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guowei Liu
- Laboratorium für Technische Chemie, Universitätstrasse 6, ETH-Zürich Eidgenössische Technische Hochschule, CH-8092 Zürich, Switzerland
| | - Marc Garland
- Laboratorium für Technische Chemie, Universitätstrasse 6, ETH-Zürich Eidgenössische Technische Hochschule, CH-8092 Zürich, Switzerland
| |
Collapse
|
6
|
Ara I, Falvello LR, Fernández S, Forniés J, Lalinde E, Martín A, Moreno MT. Synthesis and Reactivity of σ-Alkynyl/P-Bonded Phosphinoalkyne Platinum Complexes toward cis-[M(C6F5)2(thf)2] (M = Pt, Pd). Organometallics 1997. [DOI: 10.1021/om970663y] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irene Ara
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - Larry R. Falvello
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - Susana Fernández
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - Juan Forniés
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - Elena Lalinde
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - Antonio Martín
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| | - M. Teresa Moreno
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain, and Departamento de Química, Universidad de La Rioja, 26001 Logroño, Spain
| |
Collapse
|
7
|
Alvarez-Toledano C, Baldovino O, Espinoza G, Toscano RA, Gutiérrez-Pérez R, García-Mellado O. Reactivity of a two heteroatom stabilized anionic chromium (0) carbene complex towards a mono- and a disubstituted alkyne: New synthesis of γ-aminobutenolides and formation of a novel oligomer chromium (0) complex. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00091-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
8
|
Chi Y, Wu HL, Chen CC, Su CJ, Peng SM, Lee GH. Syntheses and Reactivity of Heterometallic Oxo−Acetylide Cluster Compounds. Skeletal Rearrangement and Conversion of Acetylide to Alkenyl, Alkylidene, and Allenyl Ligands on a WRe2 Framework. Organometallics 1997. [DOI: 10.1021/om9609426] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yun Chi
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Hsiao-Ling Wu
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Chi-Chung Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Chi-Jung Su
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Shie-Ming Peng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | - Gene-Hsiang Lee
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, and Department of Chemistry and Instrumentation Center, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| |
Collapse
|
9
|
Forniés J, Lalinde E. Synthesis, structure and reactivity of homo- and hetero-polynuclear complexes of platinum bearing CCR groups as unique bridging ligands. ACTA ACUST UNITED AC 1996. [DOI: 10.1039/dt9960002587] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Synthesis, structure and reactions of seven-coordinate, phosphine-supported, halide-activated carbonyl- and alkyne-complexes of niobium(I). J Organomet Chem 1994. [DOI: 10.1016/0022-328x(94)87102-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|