1
|
Tada T, Mizuno Y, Shibata Y, Yasui H, Kuge Y. Application of copper (I) selective ligands for PET imaging of reactive oxygen species through metabolic trapping. Nucl Med Biol 2024; 134-135:108914. [PMID: 38733873 DOI: 10.1016/j.nucmedbio.2024.108914] [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: 10/17/2023] [Revised: 03/29/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
INTRODUCTION Reactive oxygen species (ROS) are attractive targets for clinical PET imaging. In this study, we hypothesized that PET imaging of ROS would be possible by using chelating ligands (L) that form stable complexes with copper (I) but not with copper (II), based on metabolic trapping. Namely, when [64Cu][CuI(L)2]+ is oxidized by ROS, the oxidized complex will release [64Cu]Cu2+. Then, the released [64Cu]Cu2+ will be trapped inside the cell, resulting in PET signal depending on the redox potential of ROS. To examine the potential of this novel molecular design for ROS imaging, we synthesized copper (I) complexes with bicinchoninic acid (BCA) disodium salt and bathocuproinedisulfonic acid (BCS) disodium salt and evaluated their reactivity with several kinds of ROS. In addition, the cellular uptake of [64Cu][CuI(BCS)2]3- and the stability of [64Cu][CuI(BCS)2]3- in a biological condition were also evaluated. METHODS [64Cu]Cu2+ was reduced to [64Cu]Cu+ by ascorbic acid and coordinated with BCA and BCS in the acetate buffer to synthesize [64Cu][CuI(BCA)2]3- and [64Cu][CuI(BCS)2]3-. The radiochemical yields were determined by thin-layer chromatography (TLC). After [64Cu][CuI(BCS)2]3- was incubated with hydroxyl radical, lipid peroxide, superoxide, and hydrogen peroxide, the percentage of released [64Cu]Cu2+ from the parent complex was evaluated by TLC. HT-1080 human fibrosarcoma cells were treated with 0.1 % Dimethyl sulfoxide (control), imidazole ketone erastin (IKE), or IKE + ferrostatin-1 (Fer-1). Then, the uptake of [64Cu][CuI(BCS)2]3- to HT-1080 cells in each group was evaluated as %Dose/mg protein. Lastly, [64Cu][CuI(BCS)2]3- was incubated in human plasma, and its intact ratio was determined by TLC. RESULTS The radiochemical yield of [64Cu][CuI(BCS)2]3- (86 ± 1 %) was higher than that of [64Cu][CuI(BCA)2]3- (44 ± 3 %). [64Cu][CuI(BCA)2]3- was unstable and partially decomposed on TLC. After [64Cu][CuI(BCS)2]3- was reacted with hydroxyl radical, lipid peroxide, and superoxide, 67 ± 2 %, 44 ± 13 %, and 22 ± 3 % of total radioactivity was detected as [64Cu]Cu2+, respectively. On the other hand, the reaction with hydrogen peroxide did not significantly increase the ratio of [64Cu]Cu2+ (4 ± 1 %). These results suggest that [64Cu][CuI(BCS)2]3- could be used for detecting high-redox-potential ROS such as hydroxyl radical and lipid peroxide with high selectivity. The cellular uptake values of [64Cu][CuI(BCS)2]3- in the control, IKE, and Fer-1 group were 42 ± 2, 54 ± 2, and 47 ± 5 %Dose/mg protein (n = 3), respectively, suggesting the ROS specific uptake of [64Cu][CuI(BCS)2]3-. On the other hand, the intact ratio after the incubation of [64Cu][CuI(BCS)2]3- in human plasma was 9 ± 5 %. CONCLUSION PET imaging of ROS would be possible by using a copper (I) selective ligand, based on metabolic trapping. Although improvement of the membrane permeability and the stability of copper (I) complexes is required, the present results pave the way for the development of novel 64Cu-labeled complexes for PET imaging of ROS.
Collapse
Affiliation(s)
- Tetsuro Tada
- Graduate School of Biomedical Science and Engineering, Hokkaido University, Hokkaido 060-0815, Japan
| | - Yuki Mizuno
- Central Institute of Isotope Science, Hokkaido University, Hokkaido 060-0815, Japan; Global Center for Biomedical Science and Engineering, Hokkaido University, Hokkaido 060-0815, Japan.
| | - Yuki Shibata
- Central Institute of Isotope Science, Hokkaido University, Hokkaido 060-0815, Japan
| | - Hironobu Yasui
- Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan; One Health Research Center, Hokkaido University, Hokkaido 060-0818, Japan
| | - Yuji Kuge
- Central Institute of Isotope Science, Hokkaido University, Hokkaido 060-0815, Japan; Global Center for Biomedical Science and Engineering, Hokkaido University, Hokkaido 060-0815, Japan
| |
Collapse
|
2
|
Yu Z, Blade G, Bouley BS, Dobrucki IT, Dobrucki LW, Mirica LM. Coordination Chemistry of Sulfur-Containing Bifunctional Chelators: Toward in Vivo Stabilization of 64Cu PET Imaging Agents for Alzheimer's Disease. Inorg Chem 2023; 62:20820-20833. [PMID: 38060375 PMCID: PMC11400993 DOI: 10.1021/acs.inorgchem.3c02929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
The broader utilization of 64Cu positron emission tomography (PET) imaging agents has been hindered by the unproductive demetalation induced by bioreductants. To advance the development of 64Cu-based PET imaging tracers for Alzheimer's Disease (AD), there is a need for novel ligand design strategies. In this study, we developed sulfur-containing dithiapyridinophane (N2S2) bifunctional chelators (BFCs) as well as all nitrogen-based diazapyridinophane (N4) BFCs to compare their abilities to chelate Cu and target Aβ aggregates. Through spectrophotometric titrations and electrochemical measurements, we have demonstrated that the N2S2-based BFCs exhibit >10 orders of magnitude higher binding affinity toward Cu(I) compared to their N4-based counterparts, while both types of BFCs exhibit high stability constants toward Cu(II). Notably, solid state structures for both Cu(II) and Cu(I) complexes supported by the two ligand frameworks were obtained, providing molecular insights into their copper chelating abilities. Aβ binding experiments were conducted to study the structure-affinity relationship, and fluorescence microscopy imaging studies confirmed the selective labeling of the BFCs and their copper complexes. Furthermore, we investigated the potential of these ligands for the 64Cu-based PET imaging of AD through radiolabeling and autoradiography studies. We believe our findings provide molecular insights into the design of bifunctional Cu chelators that can effectively stabilize both Cu(II) and Cu(I) and, thus, can have significant implications for the development of 64Cu PET imaging as a diagnostic tool for AD.
Collapse
Affiliation(s)
- Zhengxin Yu
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, Carle Illinois College of Medicine, University of Illinois at Urbana─Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Glenn Blade
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, Carle Illinois College of Medicine, University of Illinois at Urbana─Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Bailey S Bouley
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, Carle Illinois College of Medicine, University of Illinois at Urbana─Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Iwona T Dobrucki
- Beckman Institute for Advanced Science and Technology, Department of Bioengineering, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
| | - Lawrence W Dobrucki
- Beckman Institute for Advanced Science and Technology, Department of Bioengineering, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
| | - Liviu M Mirica
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, Carle Illinois College of Medicine, University of Illinois at Urbana─Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
- Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| |
Collapse
|
3
|
Tosato M, Franchi S, Isse AA, Del Vecchio A, Zanoni G, Alker A, Asti M, Gyr T, Di Marco V, Mäcke H. Is Smaller Better? Cu 2+/Cu + Coordination Chemistry and Copper-64 Radiochemical Investigation of a 1,4,7-Triazacyclononane-Based Sulfur-Rich Chelator. Inorg Chem 2023; 62:20621-20633. [PMID: 37115633 PMCID: PMC10731632 DOI: 10.1021/acs.inorgchem.3c00621] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Indexed: 04/29/2023]
Abstract
The biologically triggered reduction of Cu2+ to Cu+ has been postulated as a possible in vivo decomplexation pathway in 64/67Cu-based radiopharmaceuticals. In an attempt to hinder this phenomenon, we have previously developed a family of S-containing polyazamacrocycles based on 12-, 13-, or 14-membered tetraaza rings able to stabilize both oxidation states. However, despite the high thermodynamic stability of the resulting Cu2+/+ complexes, a marked [64Cu]Cu2+ release was detected in human serum, likely as a result of the partially saturated coordination sphere around the copper center. In the present work, a new hexadentate macrocyclic ligand, 1,4,7-tris[2-(methylsulfanyl)ethyl)]-1,4,7-triazacyclononane (NO3S), was synthesized by hypothesizing that a smaller macrocyclic backbone could thwart the observed demetalation by fully encapsulating the copper ion. To unveil the role of the S donors in the metal binding, the corresponding alkyl analogue 1,4,7-tris-n-butyl-1,4,7-triazacyclononane (TACN-n-Bu) was considered as comparison. The acid-base properties of the free ligands and the kinetic, thermodynamic, and structural properties of their Cu2+ and Cu+ complexes were investigated in solution and solid (crystal) states through a combination of spectroscopic and electrochemical techniques. The formation of two stable mononuclear species was detected in aqueous solution for both ligands. The pCu2+ value for NO3S at physiological pH was 6 orders of magnitude higher than that computed for TACN-n-Bu, pointing out the significant stabilizing contribution arising from the Cu2+-S interactions. In both the solid state and solution, Cu2+ was fully embedded in the ligand cleft in a hexacoordinated N3S3 environment. Furthermore, NO3S exhibited a remarkable ability to form a stable complex with Cu+ through the involvement of all of the donors in the coordination sphere. Radiolabeling studies evidenced an excellent affinity of NO3S toward [64Cu]Cu2+, as quantitative incorporation was achieved at high apparent molar activity (∼10 MBq/nmol) and under mild conditions (ambient temperature, neutral pH, 10 min reaction time). Human serum stability assays revealed an increased stability of [64Cu][Cu(NO3S)]2+ when compared to the corresponding complexes formed by 12-, 13-, or 14-membered tetraaza rings.
Collapse
Affiliation(s)
- Marianna Tosato
- Department
of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Sara Franchi
- Department
of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | | | | | - Giordano Zanoni
- Department
of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - André Alker
- Roche
Pharmaceutical Research and Early Development, Roche Innovation Center Basel F. Hoffmann-La Roche, 4058 Basel, Switzerland
| | - Mattia Asti
- Radiopharmaceutical
Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS Reggio Emilia, 42122 Reggio Emilia, Italy
| | - Thomas Gyr
- Division
of Radiopharmaceutical Chemistry, Clinic of Radiology and Nuclear
Medicine, University Hospital Basel, 4031 Basel, Switzerland
| | - Valerio Di Marco
- Department
of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Helmut Mäcke
- Department
of Nuclear Medicine, University Hospital
Freiburg, D-79106 Freiburg, Germany
| |
Collapse
|
4
|
Hierlmeier I, Guillou A, Earley DF, Linden A, Holland JP, Bartholomä MD. HNODThia: A Promising Chelator for the Development of 64Cu Radiopharmaceuticals. Inorg Chem 2023; 62:20677-20687. [PMID: 37487036 DOI: 10.1021/acs.inorgchem.3c01616] [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: 07/26/2023]
Abstract
Herein, we present the synthesis and coordination chemistry of copper(II) and zinc(II) complexes of two novel heterocyclic triazacyclononane (tacn)-based chelators (HNODThia and NODThia-AcNHEt). The chelator HNODThia was further derivatized to obtain a novel PSMA-based bioconjugate (NODThia-PSMA) and a bifunctional photoactivatable azamacrocyclic analogue, NODThia-PEG3-ArN3, for the development of copper-64 radiopharmaceuticals. 64Cu radiolabeling experiments were performed on the different metal-binding chelates, whereby quantitative radiochemical conversion (RCC) was obtained in less than 10 min at room temperature. The in vitro stability of NODThia-PSMA in human plasma was assessed by ligand-challenge and copper-exchange experiments. Next, we investigated the viability of the photoactivatable analog (NODThia-PEG3-ArN3) for the light-induced photoradiosynthesis of radiolabeled proteins. One-pot photoconjugation reactions to human serum albumin (HSA) as a model protein and the clinically relevant monoclonal antibody formulation MetMAb were performed. [64Cu]Cu-7-azepin-HSA and [64Cu]Cu-7-azepin-onartuzumab were prepared in less than 15 min by irradiation at 395 nm, with radiochemical purities (RCP) of >95% and radiochemical yields (RCYs) of 42.7 ± 5.3 and 49.6%, respectively. Together, the results obtained here open the way for the development of highly stable 64Cu-radiopharmaceuticals by using aza-heterocyclic tacn-based chelators, and the method can easily be extended to the development of 67Cu radiopharmaceuticals for future applications in molecularly targeted radio(immuno)therapy.
Collapse
Affiliation(s)
- Ina Hierlmeier
- Department of Nuclear Medicine, Saarland University - Medical Center, Kirrberger Str. 100, Building 50, 66421 Homburg, Germany
| | - Amaury Guillou
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
- University of Caen, Cyceron, Bd Henri Becquerel, 14000 Caen, France
| | - Daniel F Earley
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Anthony Linden
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Jason P Holland
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Mark D Bartholomä
- Department of Nuclear Medicine, Saarland University - Medical Center, Kirrberger Str. 100, Building 50, 66421 Homburg, Germany
| |
Collapse
|
5
|
Schreck MV, Burgard C, Schmidtke A, Hierlmeier I, Stemler T, Maus S, Rosar F, Jung M, Speicher A, Ezziddin S, Holland JP, Bartholomä MD. Radiometal Complexes as Pharmacokinetic Modifiers: A Potent 68Ga-Labeled Gastrin-Releasing Peptide Receptor Antagonist Based on the Macrocyclic Metal Chelator NODIA-Me. Mol Pharm 2023; 20:6463-6473. [PMID: 37978936 DOI: 10.1021/acs.molpharmaceut.3c00852] [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] [Indexed: 11/19/2023]
Abstract
The gastrin-releasing peptide receptor (GRPr) is overexpressed in various cancer types including prostate and breast carcinomas, making it an attractive target for molecular imaging and therapy. In this work, we designed a novel GRPr antagonistic probe comprising metal chelator NODIA-Me. This 1,4,7-triazacyclononane-based chelator forms positively charged metal complexes due to its neutral methylimidazole arms. Because a positive charge at the N-terminus of GRPr conjugates is responsible for high receptor affinity as exemplified by the current gold standard DOTA-RM2, we investigated if a positively charged radiometal complex can be used as a pharmacokinetic modifier to also produce high-affinity GRPr conjugates. In this respect, the bioconjugate NODIA-Me-Ahx-JMV594 was prepared by a combination of solid-phase peptide synthesis and solution-based reactions in a 94% yield. Radiolabeling provided the 68Ga-labeled conjugate in radiochemical yields of >95% and radiochemical purities of >98% with mean molar activities of Am ∼17 MBq nmol-1. The competitive GRPr affinity of the metal-free and 69/71Ga-labeled conjugate was determined to be IC50 = 0.41 ± 0.06 and 1.45 ± 0.06 nM, respectively. The metal-free GRPr antagonist DOTA-RM2 and its corresponding 69/71Ga complex had IC50 values of 1.42 ± 0.07 and 0.98 ± 0.19 nM, respectively. Small-animal PET imaging of mice bearing GRPr(+) PC-3 tumors revealed high radioactivity accumulation in the tumors and in the pancreas as an organ with high levels of GRPr expression. These findings were corroborated by the corresponding ex vivo biodistribution data, in which the tumors and the pancreas exhibited the highest radioactivity accumulation. By coinjection of an excess of NODIA-Me-Ahx-JMV594, uptake in the tumors and GRPr(+) organs was significantly reduced, confirming specific receptor-mediated uptake. The estrogen receptor-positive tumor of a female breast cancer patient was clearly visualized by PET imaging using 68Ga-labeled NODIA-Me-Ahx-JMV594. To summarize, the positive charge at the N-terminus of the conjugate induced by the Ga(NODIA-Me) complex resulted in high GRPr affinity comparable to that of the potent antagonist DOTA-RM2. The conjugate NODIA-Me-Ahx-JMV594 is a promising probe for imaging of GRPr tumors that warrants further evaluation in larger patient cohorts as well as in combination with other radiometals.
Collapse
Affiliation(s)
- Moritz-Valentin Schreck
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Caroline Burgard
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Alexander Schmidtke
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Ina Hierlmeier
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Tobias Stemler
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Stephan Maus
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Florian Rosar
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Martin Jung
- Department of Medical Biochemistry and Molecular Biology, Saarland University, D-66421 Homburg, Germany
| | - Andreas Speicher
- Department of Organic Chemistry, Saarland University, D-66123 Saarbrücken, Germany
| | - Samer Ezziddin
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| | - Jason P Holland
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Mark D Bartholomä
- Department of Nuclear Medicine, Saarland University-Medical Center, Kirrbergerstrasse, D-66421 Homburg, Germany
| |
Collapse
|
6
|
Diem-Tran PT, Ho TT, Tuan NV, Bao LQ, Phuong HT, Chau TTG, Minh HTB, Nguyen CT, Smanova Z, Casanola-Martin GM, Rasulev B, Pham-The H, Cuong LCV. Stability Constant and Potentiometric Sensitivity of Heavy Metal-Organic Fluorescent Compound Complexes: QSPR Models for Prediction and Design of Novel Coumarin-like Ligands. TOXICS 2023; 11:595. [PMID: 37505560 PMCID: PMC10383909 DOI: 10.3390/toxics11070595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/02/2023] [Accepted: 07/04/2023] [Indexed: 07/29/2023]
Abstract
Industrial wastewater often consists of toxic chemicals and pollutants, which are extremely harmful to the environment. Heavy metals are toxic chemicals and considered one of the major hazards to the aquatic ecosystem. Analytical techniques, such as potentiometric methods, are some of the methods to detect heavy metals in wastewaters. In this work, the quantitative structure-property relationship (QSPR) was applied using a range of machine learning techniques to predict the stability constant (logβML) and potentiometric sensitivity (PSML) of 200 ligands in complexes with the heavy metal ions Cu2+, Cd2+, and Pb2+. In result, the logβML models developed for four ions showed good performance with square correlation coefficients (R2) ranging from 0.80 to 1.00 for the training and 0.72 to 0.85 for the test sets. Likewise, the PSML displayed acceptable performance with an R2 of 0.87 to 1.00 for the training and 0.73 to 0.95 for the test sets. By screening a virtual database of coumarin-like structures, several new ligands bearing the coumarin moiety were identified. Three of them, namely NEW02, NEW03, and NEW07, showed very good sensitivity and stability in the metal complexes. Subsequent quantum-chemical calculations, as well as physicochemical/toxicological profiling were performed to investigate their metal-binding ability and developability of the designed sensors. Finally, synthesis schemes are proposed to obtain these three ligands with major efficiency from simple resources. The three coumarins designed clearly demonstrated capability to be suitable as good florescent chemosensors towards heavy metals. Overall, the computational methods applied in this study showed a very good performance as useful tools for designing novel fluorescent probes and assessing their sensing abilities.
Collapse
Affiliation(s)
- Phan Thi Diem-Tran
- Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hue 53000, Vietnam
| | - Tue-Tam Ho
- Faculty of Pharmaceutical Chemistry and Technology, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 10000, Vietnam
| | - Nguyen-Van Tuan
- Faculty of Pharmaceutical Chemistry and Technology, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 10000, Vietnam
| | - Le-Quang Bao
- Faculty of Pharmaceutical Chemistry and Technology, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 10000, Vietnam
| | - Ha Tran Phuong
- Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hue 53000, Vietnam
| | - Trinh Thi Giao Chau
- Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hue 53000, Vietnam
| | - Hoang Thi Binh Minh
- Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hue 53000, Vietnam
| | - Cong-Truong Nguyen
- Faculty of Pharmaceutical Chemistry and Technology, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 10000, Vietnam
| | - Zulayho Smanova
- Department of Chemistry, National University of Uzbekistan after Mirzo Ulugbek, Tashkent 100012, Uzbekistan
| | | | - Bakhtiyor Rasulev
- Department of Chemistry, National University of Uzbekistan after Mirzo Ulugbek, Tashkent 100012, Uzbekistan
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, ND 58102, USA
| | - Hai Pham-The
- Faculty of Pharmaceutical Chemistry and Technology, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 10000, Vietnam
| | - Le Canh Viet Cuong
- Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hue 53000, Vietnam
| |
Collapse
|
7
|
Mondal S, Karar M, Dey N. Dye-surfactant co-assembly as the chromogenic indicator for nanomolar level detection of Cu(I) ions via a color-changing response. J Mater Chem B 2023; 11:4111-4120. [PMID: 37165919 DOI: 10.1039/d3tb00115f] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Polyaromatic amphiphilic probes have been developed, that can be involved in chromogenic detection of Cu+ ions in anionic micelles. A rapid change in solution color from yellow to orange was observed in the presence of Cu+ ions. The detection limit was found at the nanomolar range. To the best of our knowledge, this is the first report of the visible detection of Cu+ ions in aqueous medium using anionic micelles as a stabilizing agent. Interestingly, the compound can also detect Cu+ ions, generated in situ from physiological redox processes. The mechanistic investigation suggests that the probe molecule forms a diamagnetic tetrahedral complex with the Cu+ ion, coordinating through a pyridyl ketone unit. In addition, we have also followed the interaction with Cu+ on a bilayer surface made of anionic phospholipids. Further, a Cu2+-probe ensemble is used to assay the reducing ability of different biogenic thiols depending upon the pKa of their sulfhydryl (-SH) group. This allows us to determine the amount of reducing thiols present in human urine samples. Considering the high sensitivity of the present system, we screened water samples collected from different natural sources for Cu+ ions. Nearly 100% recovery values with considerably small relative standard deviations (<5%) indicate that the present system is indeed suitable for real-life sample analysis. Finally, low-cost, reusable, chemically-modified paper strips have been developed for rapid, on-location detection of Cu+ ions.
Collapse
Affiliation(s)
- Sourav Mondal
- Department of Chemistry, BITS-Pilani Hyderabad Campus, Hyderabad-500078, India.
| | - Monaj Karar
- Department of Science and Humanities, MLR Institute of Technology, Hyderabad, Telangana-500043, India
| | - Nilanjan Dey
- Department of Chemistry, BITS-Pilani Hyderabad Campus, Hyderabad-500078, India.
| |
Collapse
|
8
|
Brown AM, Butman JL, Lengacher R, Vargo NP, Martin KE, Koller A, Śmiłowicz D, Boros E, Robinson JR. N, N-Alkylation Clarifies the Role of N- and O-Protonated Intermediates in Cyclen-Based 64Cu Radiopharmaceuticals. Inorg Chem 2023; 62:1362-1376. [PMID: 36490364 DOI: 10.1021/acs.inorgchem.2c02907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Radioisotopes of Cu, such as 64Cu and 67Cu, are alluring targets for imaging (e.g., positron emission tomography, PET) and radiotherapeutic applications. Cyclen-based macrocyclic polyaminocarboxylates are one of the most frequently examined bifunctional chelators in vitro and in vivo, including the FDA-approved 64Cu radiopharmaceutical, Cu(DOTATATE) (Detectnet); however, connections between the structure of plausible reactive intermediates and their stability under physiologically relevant conditions remain to be established. In this study, we share the synthesis of a cyclen-based, N,N-alkylated spirocyclic chelate, H2DO3AC4H8, which serves as a model for N-protonation. Our combined experimental (in vitro and in vivo) and computational studies unravel complex pH-dependent speciation and enable side-by-side comparison of N- and O-protonated species of relevant 64Cu radiopharmaceuticals. Our studies suggest that N-protonated species are not inherently unstable species under physiological conditions and demonstrate the potential of N,N-alkylation as a tool for the rational design of future radiopharmaceuticals.
Collapse
Affiliation(s)
- Alexander M Brown
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Jana L Butman
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Raphael Lengacher
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Natasha P Vargo
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Kirsten E Martin
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Angus Koller
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Dariusz Śmiłowicz
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| |
Collapse
|
9
|
Uzal-Varela R, Patinec V, Tripier R, Valencia L, Maneiro M, Canle M, Platas-Iglesias C, Esteban-Gómez D, Iglesias E. On the dissociation pathways of copper complexes relevant as PET imaging agents. J Inorg Biochem 2022; 236:111951. [PMID: 35963110 DOI: 10.1016/j.jinorgbio.2022.111951] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/15/2022] [Accepted: 07/27/2022] [Indexed: 02/07/2023]
Abstract
Several bifunctional chelators have been synthesized in the last years for the development of new 64Cu-based PET agents for in vivo imaging. When designing a metal-based PET probe, it is important to achieve high stability and kinetic inertness once the radioisotope is coordinated. Different competitive assays are commonly used to evaluate the possible dissociation mechanisms that may induce Cu(II) release in the body. Among them, acid-assisted dissociation tests or transchelation challenges employing EDTA or SOD are frequently used to evaluate both solution thermodynamics and the kinetic behavior of potential metal-based systems. Despite of this, the Cu(II)/Cu(I) bioreduction pathway that could be promoted by the presence of bioreductants still remains little explored. To fill this gap we present here a detailed spectroscopic study of the kinetic behavior of different macrocyclic Cu(II) complexes. The complexes investigated include the cross-bridge cyclam derivative [Cu(CB-TE1A)]+, whose structure was determined using single-crystal X-ray diffraction. The acid-assisted dissociation mechanism was investigated using HClO4 and HCl to analyse the effect of the counterion on the rate constants. The complexes were selected so that the effects of complex charge and coordination polyhedron could be assessed. Cyclic voltammetry experiments were conducted to investigate whether the reduction to Cu(I) falls within the window of common bioreducing agents. The most striking behavior concerns the [Cu(NO2Th)]2+ complex, a 1,4,7-triazacyclononane derivative containing two methylthiazolyl pendant arms. This complex is extremely inert with respect to dissociation following the acid-catalyzed mechanism, but dissociates rather quickly in the presence of a bioreductant like ascorbic acid.
Collapse
Affiliation(s)
- Rocío Uzal-Varela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Véronique Patinec
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Raphaël Tripier
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Laura Valencia
- Departamento de Química Inorgánica, Universidade de Vigo, Facultad de Ciencias, 36310 Pontevedra, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Facultade de Ciencias, 27002 Lugo, Spain
| | - Moisés Canle
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
| | - Emilia Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
| |
Collapse
|
10
|
Chelation of Theranostic Copper Radioisotopes with S-Rich Macrocycles: From Radiolabelling of Copper-64 to In Vivo Investigation. Molecules 2022; 27:molecules27134158. [PMID: 35807404 PMCID: PMC9268100 DOI: 10.3390/molecules27134158] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 12/10/2022] Open
Abstract
Copper radioisotopes are generally employed for cancer imaging and therapy when firmly coordinated via a chelating agent coupled to a tumor-seeking vector. However, the biologically triggered Cu2+-Cu+ redox switching may constrain the in vivo integrity of the resulting complex, leading to demetallation processes. This unsought pathway is expected to be hindered by chelators bearing N, O, and S donors which appropriately complements the borderline-hard and soft nature of Cu2+ and Cu+. In this work, the labelling performances of a series of S-rich polyazamacrocyclic chelators with [64Cu]Cu2+ and the stability of the [64Cu]Cu-complexes thereof were evaluated. Among the chelators considered, the best results were obtained with 1,7-bis [2-(methylsulfanyl)ethyl]-4,10,diacetic acid-1,4,7,10-tetraazacyclododecane (DO2A2S). DO2A2S was labelled at high molar activities in mild reaction conditions, and its [64Cu]Cu2+ complex showed excellent integrity in human serum over 24 h. Biodistribution studies in BALB/c nude mice performed with [64Cu][Cu(DO2A2S)] revealed a behavior similar to other [64Cu]Cu-labelled cyclen derivatives characterized by high liver and kidney uptake, which could either be ascribed to transchelation phenomena or metabolic processing of the intact complex.
Collapse
|
11
|
Kubinec J, Širůčková V, Havlíčková J, Kotek J, Kubicek V, Lubal P, Hermann P. Complexes of NOTA‐monoamides with CuII ion: Structural, equilibrium and kinetic study. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jan Kubinec
- Univerzita Karlova Přírodovědecká fakulta: Univerzita Karlova Prirodovedecka fakulta Department of Inorganic Chemistry CZECH REPUBLIC
| | - Viktorie Širůčková
- Masarykova univerzita Přírodovědecká fakulta: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Jana Havlíčková
- PřF UK: Univerzita Karlova Prirodovedecka fakulta Department of Inorganic Chemistry CZECH REPUBLIC
| | - Jan Kotek
- Univerzita Karlova Prirodovedecka fakulta Department of Inorganic Chemistry CZECH REPUBLIC
| | - Vojtech Kubicek
- Charles University in Prague, Faculty of Science Department of Inorganic Chemistry Hlavova 2030 128 40 Prague 2 CZECH REPUBLIC
| | - Přemysl Lubal
- Masarykova univerzita Přírodovědecká fakulta: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Petr Hermann
- Univerzita Karlova Přírodovědecká fakulta: Univerzita Karlova Prirodovedecka fakulta Departmnet of Inorganic Chemistry CZECH REPUBLIC
| |
Collapse
|
12
|
Huang Y, Huynh TT, Sun L, Hu CH, Wang YC, Rogers BE, Mirica LM. Neutral Ligands as Potential 64Cu Chelators for Positron Emission Tomography Imaging Applications in Alzheimer's Disease. Inorg Chem 2022; 61:4778-4787. [PMID: 35245023 DOI: 10.1021/acs.inorgchem.2c00621] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Positron emission tomography (PET), which uses positron-emitting radionuclides to visualize and measure processes in the human body, is a useful noninvasive diagnostic tool for Alzheimer's disease (AD). The development of longer-lived radiolabeled compounds is essential for further expansion of the use of PET imaging in healthcare, and diagnostic agents employing longer-lived radionuclides such as 64Cu (t1/2 = 12.7 h, β+ = 17%, β- = 39%, electron capture EC = 43%, and Emax = 0.656 MeV) can accomplish this task. One limitation of 64Cu PET agents for neuroimaging applications is their limited lipophilicity due to the presence of several anionic groups needed to ensure strong Cu chelation. Herein, we evaluate a series of neutral chelators containing the 1,4,7-triazacyclononane or 2,11-diaza[3.3](2,6)pyridinophane macrocycles that have pyridyl-containing arms incorporating Aβ-peptide-interacting fragments. The crystal structures of the corresponding Cu complexes confirm that the pyridyl N atoms are involved in binding to Cu. Radiolabeling and autoradiography studies show that the compounds efficiently chelate 64Cu, and the resulting complexes exhibit specific binding to the amyloid plaques in the AD mouse brain sections versus wild-type controls.
Collapse
Affiliation(s)
- Yiran Huang
- Department of Chemistry, University of Illinois at Urbana-Champaign (UIUC), 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Truc T Huynh
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, United States.,Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Liang Sun
- Department of Chemistry, University of Illinois at Urbana-Champaign (UIUC), 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Chi-Herng Hu
- Department of Chemistry, University of Illinois at Urbana-Champaign (UIUC), 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Yung-Ching Wang
- Department of Chemistry, University of Illinois at Urbana-Champaign (UIUC), 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Buck E Rogers
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
| | - Liviu M Mirica
- Department of Chemistry, University of Illinois at Urbana-Champaign (UIUC), 600 South Mathews Avenue, Urbana, Illinois 61801, United States.,Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| |
Collapse
|
13
|
Saputri WD, Pranowo HD, Hofer TS. Can’t we negotiate the importance of electron correlation? HF vs RIMP2 in ab initio quantum mechanical charge field molecular dynamics simulations of Cu+ in pure liquid ammonia. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Tosato M, Pelosato M, Franchi S, Isse AA, May NV, Zanoni G, Mancin F, Pastore P, Badocco D, Asti M, Di Marco V. When ring makes the difference: coordination properties of Cu 2+/Cu + complexes with sulfur-pendant polyazamacrocycles for radiopharmaceutical applications. NEW J CHEM 2022. [DOI: 10.1039/d2nj01032a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The Cu2+/+ complexes formed by sulfur-containing polyazamacrocycles were studied in aqueous solution using potentiometry, UV-Vis, NMR, EPR, and cyclic voltammetry.
Collapse
Affiliation(s)
- Marianna Tosato
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Matteo Pelosato
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Sara Franchi
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | | | - Nóra Veronica May
- Centre for Structural Science, Research Centre for Natural Sciences, 1117 Budapest, Hungary
| | - Giordano Zanoni
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Fabrizio Mancin
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Mattia Asti
- Radiopharmaceutical Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| |
Collapse
|
15
|
Tosato M, Dalla Tiezza M, May NV, Isse AA, Nardella S, Orian L, Verona M, Vaccarin C, Alker A, Mäcke H, Pastore P, Di Marco V. Copper Coordination Chemistry of Sulfur Pendant Cyclen Derivatives: An Attempt to Hinder the Reductive-Induced Demetalation in 64/67Cu Radiopharmaceuticals. Inorg Chem 2021; 60:11530-11547. [PMID: 34279088 PMCID: PMC8389837 DOI: 10.1021/acs.inorgchem.1c01550] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The Cu2+ complexes formed by a series of cyclen derivatives bearing sulfur pendant arms, 1,4,7,10-tetrakis[2-(methylsulfanyl)ethyl]-1,4,7,10-tetraazacyclododecane (DO4S), 1,4,7-tris[2-(methylsulfanyl)ethyl]-1,4,7,10-tetraazacyclododecane (DO3S), 1,4,7-tris[2-(methylsulfanyl)ethyl]-10-acetamido-1,4,7,10-tetraazacyclododecane (DO3SAm), and 1,7-bis[2-(methylsulfanyl)ethyl]-4,10-diacetic acid-1,4,7,10-tetraazacyclododecane (DO2A2S), were studied in aqueous solution at 25 °C from thermodynamic and structural points of view to evaluate their potential as chelators for copper radioisotopes. UV-vis spectrophotometric out-of-cell titrations under strongly acidic conditions, direct in-cell UV-vis titrations, potentiometric measurements at pH >4, and spectrophotometric Ag+-Cu2+ competition experiments were performed to evaluate the stoichiometry and stability constants of the Cu2+ complexes. A highly stable 1:1 metal-to-ligand complex (CuL) was found in solution at all pH values for all chelators, and for DO2A2S, protonated species were also detected under acidic conditions. The structures of the Cu2+ complexes in aqueous solution were investigated by UV-vis and electron paramagnetic resonance (EPR), and the results were supported by relativistic density functional theory (DFT) calculations. Isomers were detected that differed from their coordination modes. Crystals of [Cu(DO4S)(NO3)]·NO3 and [Cu(DO2A2S)] suitable for X-ray diffraction were obtained. Cyclic voltammetry (CV) experiments highlighted the remarkable stability of the copper complexes with reference to dissociation upon reduction from Cu2+ to Cu+ on the CV time scale. The Cu+ complexes were generated in situ by electrolysis and examined by NMR spectroscopy. DFT calculations gave further structural insights. These results demonstrate that the investigated sulfur-containing chelators are promising candidates for application in copper-based radiopharmaceuticals. In this connection, the high stability of both Cu2+ and Cu+ complexes can represent a key parameter for avoiding in vivo demetalation after bioinduced reduction to Cu+, often observed for other well-known chelators that can stabilize only Cu2+.
Collapse
Affiliation(s)
- Marianna Tosato
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Marco Dalla Tiezza
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Nóra V May
- Centre for Structural Science, Research Centre for Natural Sciences, Magyar tudósok Körútja 2, 1117 Budapest, Hungary
| | - Abdirisak Ahmed Isse
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Sonia Nardella
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy.,Department of Pharmaceutical Sciences, University of Padova, via Marzolo 8, 35131 Padova, Italy
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Marco Verona
- Department of Pharmaceutical Sciences, University of Padova, via Marzolo 8, 35131 Padova, Italy
| | - Christian Vaccarin
- Department of Pharmaceutical Sciences, University of Padova, via Marzolo 8, 35131 Padova, Italy
| | - André Alker
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Basel F. Hoffmann-La Roche, Grenzacherstrasse 124, 4058 Basel, Switzerland
| | - Helmut Mäcke
- Department of Nuclear Medicine, University Hospital Freiburg, Hugstetterstrasse 55, D-79106 Freiburg, Germany
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| |
Collapse
|
16
|
Sun L, Cho HJ, Sen S, Arango AS, Huynh TT, Huang Y, Bandara N, Rogers BE, Tajkhorshid E, Mirica LM. Amphiphilic Distyrylbenzene Derivatives as Potential Therapeutic and Imaging Agents for Soluble and Insoluble Amyloid β Aggregates in Alzheimer's Disease. J Am Chem Soc 2021; 143:10462-10476. [PMID: 34213901 PMCID: PMC8762579 DOI: 10.1021/jacs.1c05470] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alzheimer's Disease (AD) is the most common neurodegenerative disease, and efficient therapeutic and early diagnostic agents for AD are still lacking. Herein, we report the development of a novel amphiphilic compound, LS-4, generated by linking a hydrophobic amyloid-binding distyrylbenzene fragment with a hydrophilic triazamacrocycle, which dramatically increases the binding affinity toward various amyloid β (Aβ) peptide aggregates, especially for soluble Aβ oligomers. Moreover, upon the administration of LS-4 to 5xFAD mice, fluorescence imaging of LS-4-treated brain sections reveals that LS-4 can penetrate the blood-brain barrier and bind to the Aβ oligomers in vivo. In addition, the treatment of 5xFAD mice with LS-4 reduces the amount of both amyloid plaques and associated phosphorylated tau aggregates vs the vehicle-treated 5xFAD mice, while microglia activation is also reduced. Molecular dynamics simulations corroborate the observation that introducing a hydrophilic moiety into the molecular structure of LS-4 can enhance the electrostatic interactions with the polar residues of the Aβ species. Finally, exploiting the Cu2+-chelating property of the triazamacrocycle, we performed a series of imaging and biodistribution studies that show the 64Cu-LS-4 complex binds to the amyloid plaques and can accumulate to a significantly larger extent in the 5xFAD mouse brains vs the wild-type controls. Overall, these results illustrate that the novel strategy, to employ an amphiphilic molecule containing a hydrophilic moiety attached to a hydrophobic amyloid-binding fragment, can increase the binding affinity for both soluble and insoluble Aβ aggregates and can thus be used to detect and regulate various Aβ species in AD.
Collapse
Affiliation(s)
- Liang Sun
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Hong-Jun Cho
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Soumyo Sen
- NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology, Center for Biophysics and Quantitative Biology and Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Andres S Arango
- NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology, Center for Biophysics and Quantitative Biology and Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Truc T Huynh
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Yiran Huang
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Nilantha Bandara
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
| | - Buck E Rogers
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
| | - Emad Tajkhorshid
- NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology, Center for Biophysics and Quantitative Biology and Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Liviu M Mirica
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, The Neuroscience Program, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
- Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| |
Collapse
|
17
|
Clauss R, Kazimir A, Straube A, Hey-Hawkins E. Palladium Goes First: A Neutral Asymmetric Heteroditopic N, P Ligand Forming Pd-3d Heterobimetallic Complexes. Inorg Chem 2021; 60:8722-8733. [PMID: 34060826 DOI: 10.1021/acs.inorgchem.1c00694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A facile two-step synthesis of bis(1-methylhydrazinyl)pyrimidine from pyridine-2-carbaldehyde and 2-diphenylphosphanylbenzaldehyde gave access to the new asymmetric ligand 1. The phosphane selectively guides PdII into the softer tridentate N,N,P pocket, yielding monometallic complex 2. A second reaction with a 3d transition metal complex precursor (groups 7 to 12) fills the vacant N,N,N pocket and thus provides a variety of heterobimetallic complexes of the type PdII/MII (M = Mn (3), Fe (4), Co (5), Ni (6), Cu (7), Zn (8)). Single-crystal X-ray diffraction studies were performed for all complexes. The assembly of μ2-chlorido-bridged dimers was observed for complexes 5-7 in the solid state, while DOSY NMR experiments have shown that 5-7 are unbridged monomers in solution. As an exception, FeII prefers to form the homoleptic meridional complex [Fe{PdCl(1)}2](OTf)4 (4). The electrochemical behavior and the effective magnetic moment in solution were investigated for all complexes by cyclic voltammetry and Evans method, respectively. Experimental UV/vis results were interpreted by performing TD-DFT calculations on 1, 2, and 3.
Collapse
Affiliation(s)
- Reike Clauss
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany
| | - Aleksandr Kazimir
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany
| | - Axel Straube
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany
| |
Collapse
|
18
|
Vaughn BA, Brown AM, Ahn SH, Robinson JR, Boros E. Is Less More? Influence of the Coordination Geometry of Copper(II) Picolinate Chelate Complexes on Metabolic Stability. Inorg Chem 2020; 59:16095-16108. [DOI: 10.1021/acs.inorgchem.0c02314] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brett A. Vaughn
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Alexander M. Brown
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Shin Hye Ahn
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Jerome R. Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| |
Collapse
|
19
|
Shuvaev S, Suturina EA, Rotile NJ, Astashkin A, Ziegler CJ, Ross AW, Walker TL, Caravan P, Taschner IS. Revisiting dithiadiaza macrocyclic chelators for copper-64 PET imaging. Dalton Trans 2020; 49:14088-14098. [PMID: 32970072 PMCID: PMC7967274 DOI: 10.1039/d0dt02787a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterisation of a dithiadiaza chelator NSNS2A, as well as copper complexes thereof are reported in this paper. Solution structures of copper(i/ii) complexes were calculated using density functional theory (DFT) and validated by both NMR and EPR spectroscopy. DFT calculations revealed a switch in the orientation of tetragonal distortion upon protonation, which might be responsible for poor stability of the Cu(II)NSNS2A complex in aqueous media, whilst the same switch in tetragonal distortion was experimentally observed by changing the solvent. The chelator was radiolabeled with 64Cu and evaluated using PET/MRI in rats. Despite a favorable redox potential to stabilize the cuprous state in vivo, the 64Cu(II)NSNS2A complex showed suboptimal stability compared to its tetraazamacrocyclic analogue, 64Cu(TE2A), with a significant 64Cu uptake in the liver.
Collapse
Affiliation(s)
- Sergey Shuvaev
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | | | - Nicholas J Rotile
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Andrei Astashkin
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | | | - Alana W Ross
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Tia L Walker
- Department of Chemistry, Indiana University Northwest, Gary, IN 46408, USA.
| | - Peter Caravan
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Ian S Taschner
- Department of Chemistry, Indiana University Northwest, Gary, IN 46408, USA.
| |
Collapse
|
20
|
Guillou A, Galland M, Roux A, Váradi B, Gogolák RA, Le Saëc P, Faivre-Chauvet A, Beyler M, Bucher C, Tircsó G, Patinec V, Maury O, Tripier R. Picolinate-appended tacn complexes for bimodal imaging: Radiolabeling, relaxivity, photophysical and electrochemical studies. J Inorg Biochem 2020; 205:110978. [PMID: 31951911 DOI: 10.1016/j.jinorgbio.2019.110978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/11/2019] [Accepted: 12/24/2019] [Indexed: 10/25/2022]
Abstract
Based on our previous works involving two 1,4,7-triazacyclononane (tacn)-based ligands Hno2py1pa (1-Picolinic acid-4,7-bis(pyridin-2-ylmethyl)-1,4,7-triazacyclononane) and Hno1pa (1-Picolinic acid-1,4,7-triazacyclononane), we report here the synthesis of analogues bearing picolinate-based π-conjugated ILCT (Intra-Ligand Charge Transfer) transition antenna (HL1, HL2), using regiospecific N-functionalization of the tacn skeleton and their related transition metal complexes (e.g. Cu2+, Zn2+ and Mn2+). Coordination properties as well as their photophysical and electrochemical properties were investigated in order to quantify the impact of such antenna on the luminescent or relaxometric properties of the complexes. The spectroscopic properties of the targeted ligands and metal complexes have been studied using UV-Vis absorption and fluorescence spectrocopies. While the zinc complex formed with HL1 possesses a moderate quantum yield of 5%, complexation of Cu2+ led to an extinction of the luminescence putatively attributed to a photo-induced electron transfer, as supported by spectroscopic and electrochemical evidences. The [Mn(L2)]+ complex is characterized by a fluorescence quantum yield close to 8% in CH2Cl2. The potential interest of such systems as bimodal probes has been assessed from radiolabeling experiments conducted on HL1 and 64Cu2+ as well as confocal microscopy analyses and from relaxometric studies carried out on the cationic [Mn(L2)]+ complex. These results showed that HL1 can be used for radiolabeling, with a radiochemical conversion of 40% in 15 min at 100 °C. Finally, the relaxivity values obtained for [Mn(L2)]+, r1p = 4.80 mM-1·s-1 and r2p = 8.72 mM-1·s-1, make the Mn(II) complex an ideal candidate as a probe for Magnetic Resonance Imaging.
Collapse
Affiliation(s)
- Amaury Guillou
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29200 Brest, France
| | - Margaux Galland
- Univ Lyon, ENS Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie, UMR 5182, 46 allée d'Italie, 69364 Lyon, France
| | - Amandine Roux
- Univ Lyon, ENS Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie, UMR 5182, 46 allée d'Italie, 69364 Lyon, France
| | - Balázs Váradi
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Réka Anna Gogolák
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Patricia Le Saëc
- Université de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232 - CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Alain Faivre-Chauvet
- Université de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232 - CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Maryline Beyler
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29200 Brest, France
| | - Christophe Bucher
- Univ Lyon, ENS Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie, UMR 5182, 46 allée d'Italie, 69364 Lyon, France
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Véronique Patinec
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29200 Brest, France.
| | - Olivier Maury
- Univ Lyon, ENS Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie, UMR 5182, 46 allée d'Italie, 69364 Lyon, France.
| | - Raphaël Tripier
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29200 Brest, France.
| |
Collapse
|
21
|
Guillou A, Lima LMP, Esteban-Gómez D, Delgado R, Platas-Iglesias C, Patinec V, Tripier R. endo- versus exo-Cyclic coordination in copper complexes with methylthiazolylcarboxylate tacn derivatives. Dalton Trans 2019; 48:8740-8755. [PMID: 31143891 DOI: 10.1039/c9dt01366k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Three tacn (1,4,7-triazacyclononane)-based ligands substituted by methylthiazolylcarboxylate (tha) and/or methylthiazolyl (th) arms have been examined for copper complexation with the aim to study the impact of carboxylate groups on the complexation of Cu(ii), which can present an endo- or exo-cyclic coordination. Two new ligands have been synthesised: H3no3tha, tacn bearing three methylthiazolylcarboxylate arms, and H2no1th2tha, tacn with one methylthiazolyl and two methylthiazolylcarboxylate arms, while Hno2th1tha had already been described. Their complexation behaviour with 1 or 1.5 equivalents of metal was studied on the basis of preliminary results showing the tendency of tha arms to form exocyclic polynuclear species. The solid state studies of the Cu(ii) and Zn(ii) complexes were investigated and some of their structures were characterised by X-ray diffraction. The physicochemical properties of the complexes in solution were also investigated by means of potentiometric measurements, UV-vis spectroscopy, EPR and computational studies, NMR characterisation of the corresponding Zn(ii) complexes and redox behaviour by electrochemistry. Mono- and tri-nuclear complexes ML and M3L2 were formed and isolated, highlighting the tendency of methylthiazolylcarboxylate arms, when carried by a tacn platform, to form exo-cyclic and polynuclear complexes. However, this exhaustive study evidences that the "out of cage" and "in cage" present different behaviour in terms of stability.
Collapse
Affiliation(s)
- Amaury Guillou
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France.
| | - Luís M P Lima
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - David Esteban-Gómez
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain
| | - Véronique Patinec
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France.
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France.
| |
Collapse
|
22
|
Guillou A, Lima LMP, Esteban-Gómez D, Le Poul N, Bartholomä MD, Platas-Iglesias C, Delgado R, Patinec V, Tripier R. Methylthiazolyl Tacn Ligands for Copper Complexation and Their Bifunctional Chelating Agent Derivatives for Bioconjugation and Copper-64 Radiolabeling: An Example with Bombesin. Inorg Chem 2019; 58:2669-2685. [PMID: 30689368 DOI: 10.1021/acs.inorgchem.8b03280] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present here the synthesis of two new bifunctionalized azachelators, no2th-EtBzNCS and Hno2th1tha, as bioconjugable analogues of two previously described di- and trimethylthiazolyl 1,4,7-triazacyclononane (tacn) ligands, no2th and no3th, for potential uses in copper-64 (64Cu) positron emission tomography imaging. The first one bears an isothiocyanate group on the remaining free nitrogen atom of the tacn framework, while the second one presents an additional carboxylic function on one of the three heterocyclic pendants. Their syntheses required regiospecific N-functionalization of the macrocycles. In order to investigate their suitability for in vivo applications, a complete study of their copper(II) chelation was performed. The acid-base properties of the ligands and their thermodynamic stability constants with copper(II) and zinc(II) cations were determined using potentiometric techniques. Structural studies were conducted in both solution and the solid state, consolidated by theoretical calculations. The kinetic inertness in an acidic medium of both copper(II) complexes was determined by spectrophotometry, while cyclic voltammetry experiments were performed to evaluate the stability at the copper(I) redox state. UV-vis, NMR (of the zinc complexes), electron paramagnetic resonance spectroscopy, and density functional theory studies showed excellent agreement between the solution structures of the complexes and their crystallographic data. These investigations unambiguously prove that these bifunctional derivatives display similar coordination properties as their no2th and no3th counterparts, opening the door to targeted bioapplications. The no2th-EtBzNCS and Hno2th1tha ligands were then conjugated to a bombesin antagonist peptide for targeting the gastrin-releasing peptide receptor (GRPr). To highlight the potential of the two chelators for radiopharmaceutical development, the 64Cu-radiolabeling properties, in vitro stability, and binding affinity to GRPr of the corresponding bioconjugates were determined. Altogether, the results of this work warrant the further development of 64Cu-based radiopharmaceuticals comprising our novel bifunctional chelators.
Collapse
Affiliation(s)
- Amaury Guillou
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Luís M P Lima
- Instituto de Tecnologia Química e Biológica António Xavier , Universidade Nova de Lisboa , Avenida da República , 2780-157 Oeiras , Portugal
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas , Universidade da Coruña , 15071 A Coruña , Spain
| | - Nicolas Le Poul
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Mark D Bartholomä
- Department of Nuclear Medicine , Saarland University-Medical Center , Kirrbergerstrasse , 66421 Homburg , Germany
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas , Universidade da Coruña , 15071 A Coruña , Spain
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica António Xavier , Universidade Nova de Lisboa , Avenida da República , 2780-157 Oeiras , Portugal
| | - Véronique Patinec
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Raphaël Tripier
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| |
Collapse
|
23
|
Investigation of the preferential solvation and dynamical properties of Cu+ in 18.6% aqueous ammonia solution using ab initio quantum mechanical charge field (QMCF) molecular dynamics and NBO analysis. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
24
|
Joshi T, Kubeil M, Nsubuga A, Singh G, Gasser G, Stephan H. Harnessing the Coordination Chemistry of 1,4,7-Triazacyclononane for Biomimicry and Radiopharmaceutical Applications. Chempluschem 2018; 83:554-564. [DOI: 10.1002/cplu.201800103] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Tanmaya Joshi
- Institute of Radiopharmaceutical Cancer Research; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstrasse 400 01328 Dresden Germany
| | - Manja Kubeil
- Institute of Radiopharmaceutical Cancer Research; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstrasse 400 01328 Dresden Germany
| | - Anne Nsubuga
- Institute of Radiopharmaceutical Cancer Research; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstrasse 400 01328 Dresden Germany
| | - Garima Singh
- Institute of Radiopharmaceutical Cancer Research; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstrasse 400 01328 Dresden Germany
| | - Gilles Gasser
- Chimie ParisTech; PSL University; Laboratory for Inorganic Chemical Biology; 75005 Paris France
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstrasse 400 01328 Dresden Germany
| |
Collapse
|
25
|
Weinmann C, Holland JP, Läppchen T, Scherer H, Maus S, Stemler T, Bohnenberger H, Ezziddin S, Kurz P, Bartholomä MD. Optimized synthesis and indium complex formation with the bifunctional chelator NODIA-Me. Org Biomol Chem 2018; 16:7503-7512. [DOI: 10.1039/c8ob01981a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Multi-step synthetic route provides the ligand NODIA-Me in high yield. Radiolabeling with [111In]InCl3 yields stable complexes in high radiochemical purity and yield.
Collapse
Affiliation(s)
- Christian Weinmann
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Institute for Inorganic and Analytical Chemistry
| | | | - Tilman Läppchen
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Department of Nuclear Medicine
| | - Harald Scherer
- Institute for Inorganic and Analytical Chemistry
- Albert-Ludwigs-University Freiburg
- Freiburg
- Germany
| | - Stephan Maus
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Tobias Stemler
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Hendrik Bohnenberger
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Samer Ezziddin
- Department of Nuclear Medicine
- University Hospital Saarland
- Saarland University
- Homburg
- Germany
| | - Philipp Kurz
- Institute for Inorganic and Analytical Chemistry
- Albert-Ludwigs-University Freiburg
- Freiburg
- Germany
| | - Mark D. Bartholomä
- Department of Nuclear Medicine
- University Hospital Freiburg
- Freiburg
- Germany
- Department of Nuclear Medicine
| |
Collapse
|
26
|
Viqueira J, Durán ML, García-Vázquez JA, Castro J, Platas-Iglesias C, Esteban-Gómez D, Alzuet-Piña G, Moldes A, Nascimento OR. Modulating the DNA cleavage ability of copper(ii) Schiff bases through ternary complex formation. NEW J CHEM 2018. [DOI: 10.1039/c8nj03292k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper(ii) Schiff-bases were electrochemically synthesized and characterized. The presence of co-ligands such as 2,2′-bpy or phen in the metal coordination environment increases the DNA cleavage efficiency.
Collapse
Affiliation(s)
- Joaquín Viqueira
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - María L. Durán
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - José A. García-Vázquez
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Jesús Castro
- Departamento de Química Inorgánica
- Facultade de Química
- Edificio de Ciencias Experimentais
- Universidade de Vigo
- 36310 Vigo
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira
- 15008 A Coruña
- Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira
- 15008 A Coruña
- Spain
| | - Gloria Alzuet-Piña
- Departament de Química Inorgànica
- Facultat de Farmàcia
- Universitat de València
- 46100 Burjassot
- Spain
| | - Angeles Moldes
- Departament de Química Inorgànica
- Facultat de Farmàcia
- Universitat de València
- 46100 Burjassot
- Spain
| | - Otaciro R. Nascimento
- Instituto de Física de Sao Carlos
- Universidade de Sao Paulo
- 13560-250 Sao Carlos
- Brazil
| |
Collapse
|
27
|
Camus N, Le Bris N, Nuryyeva S, Chessé M, Esteban-Gómez D, Platas-Iglesias C, Tripier R, Elhabiri M. Tuning the copper(ii) coordination properties of cyclam by subtle chemical modifications. Dalton Trans 2017; 46:11479-11490. [DOI: 10.1039/c7dt00750g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A copper(ii) coordination investigation of modified cyclams bearing “oxo” and/or “N-benzyl” and/or “C-hydroxyethyl” units was performed by potentiometry, ESI-MS, UV-Vis, electrochemistry and DFT.
Collapse
Affiliation(s)
- Nathalie Camus
- Université de Bretagne Occidentale
- UMR 6521 CNRS
- SFR ScInBioS
- UFR des Sciences et Techniques
- 29238 Brest Cedex 3
| | - Nathalie Le Bris
- Université de Bretagne Occidentale
- UMR 6521 CNRS
- SFR ScInBioS
- UFR des Sciences et Techniques
- 29238 Brest Cedex 3
| | - Selbi Nuryyeva
- Laboratoire de Chimie Bioorganique et Médicinale
- UMR 7509 CNRS-Université de Strasbourg
- ECPM
- 67087 Strasbourg Cedex
- France
| | - Matthieu Chessé
- Laboratoire de Chimie Bioorganique et Médicinale
- UMR 7509 CNRS-Université de Strasbourg
- ECPM
- 67087 Strasbourg Cedex
- France
| | - David Esteban-Gómez
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Raphaël Tripier
- Université de Bretagne Occidentale
- UMR 6521 CNRS
- SFR ScInBioS
- UFR des Sciences et Techniques
- 29238 Brest Cedex 3
| | - Mourad Elhabiri
- Laboratoire de Chimie Bioorganique et Médicinale
- UMR 7509 CNRS-Université de Strasbourg
- ECPM
- 67087 Strasbourg Cedex
- France
| |
Collapse
|
28
|
Moreau M, Poty S, Vrigneaud JM, Walker P, Guillemin M, Raguin O, Oudot A, Bernhard C, Goze C, Boschetti F, Collin B, Brunotte F, Denat F. MANOTA: a promising bifunctional chelating agent for copper-64 immunoPET. Dalton Trans 2017; 46:14659-14668. [DOI: 10.1039/c7dt01772c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comparison of four bifunctional chelating agents showed superior behaviour of a new NOTA derivative for 64Cu labelling of antibody fragments.
Collapse
|
29
|
Platas-Iglesias C, Esteban-Gómez D, Helm L, Regueiro-Figueroa M. Transient versus Static Electron Spin Relaxation in Mn(2+) Complexes Relevant as MRI Contrast Agents. J Phys Chem A 2016; 120:6467-76. [PMID: 27459626 DOI: 10.1021/acs.jpca.6b05423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The zero-field splitting (ZFS) parameters of the [Mn(EDTA)(H2O)](2-)·2H2O and [Mn(MeNO2A)(H2O)]·2H2O systems were estimated by using DFT and ab initio CASSCF/NEVPT2 calculations (EDTA = 2,2',2″,2‴-(ethane-1,2-diylbis(azanetriyl))tetraacetate; MeNO2A = 2,2'-(7-methyl-1,4,7-triazonane-1,4-diyl)diacetate). Subsequent molecular dynamics calculations performed within the atom-centered density matrix propagation (ADMP) approach provided access to the transient and static ZFS parameters, as well as to the correlation time of the transient ZFS. The calculated ZFS parameters present a reasonable agreement with the experimental values obtained from the analysis of (1)H relaxation data. The correlation times calculated for the two systems investigated turned out to be very short (τc ∼ 0.02-0.05 ps), which shows that the transient ZFS is modulated by molecular vibrations. On the contrary, the static ZFS is modulated by the rotation of the complexes in solution, which for the small complexes investigated here is characterized by rotational correlation times of τR ∼ 35-60 ps. As a result, electron spin relaxation in small Mn(2+) complexes is dominated by the static ZFS.
Collapse
Affiliation(s)
- Carlos Platas-Iglesias
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - David Esteban-Gómez
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Lothar Helm
- Laboratoire de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH , CH-1015 Lausanne, Switzerland
| | - Martín Regueiro-Figueroa
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| |
Collapse
|