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Falcone E, Nobili G, Okafor M, Proux O, Rossi G, Morante S, Faller P, Stellato F. Chasing the Elusive "In-Between" State of the Copper-Amyloid β Complex by X-ray Absorption through Partial Thermal Relaxation after Photoreduction. Angew Chem Int Ed Engl 2023; 62:e202217791. [PMID: 36869617 DOI: 10.1002/anie.202217791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/03/2023] [Accepted: 03/03/2023] [Indexed: 03/05/2023]
Abstract
The redox activity of Cu ions bound to the amyloid-β (Aβ) peptide is implicated as a source of oxidative stress in the context of Alzheimer's disease. In order to explain the efficient redox cycling between CuII -Aβ (distorted square-pyramidal) and CuI -Aβ (digonal) resting states, the existence of a low-populated "in-between" state, prone to bind Cu in both oxidation states, has been postulated. Here, we exploited the partial X-ray induced photoreduction at 10 K, followed by a thermal relaxation at 200 K, to trap and characterize by X-ray Absorption Spectroscopy (XAS) a partially reduced Cu-Aβ1-16 species different from the resting states. Remarkably, the XAS spectrum is well-fitted by a previously proposed model of the "in-between" state, hence providing the first direct spectroscopic characterization of an intermediate state. The present approach could be used to explore and identify the catalytic intermediates of other relevant metal complexes.
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Affiliation(s)
- Enrico Falcone
- Institut de Chimie (UMR 7177), University of Strasbourg, CNRS, 4 Rue Blaise Pascal, 67081, Strasbourg, France
| | - Germano Nobili
- Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
| | - Michael Okafor
- Institut de Chimie (UMR 7177), University of Strasbourg, CNRS, 4 Rue Blaise Pascal, 67081, Strasbourg, France
| | - Olivier Proux
- Observatoire des Sciences de l'Univers de Grenoble, UMS 832 CNRS-Université Grenoble Alpes, 38041, Grenoble, France
| | - Giancarlo Rossi
- Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
- Centro Fermi, Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Via Panisperna 89a, 00184, Roma, Italy
| | - Silvia Morante
- Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
| | - Peter Faller
- Institut de Chimie (UMR 7177), University of Strasbourg, CNRS, 4 Rue Blaise Pascal, 67081, Strasbourg, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231, Paris, France
| | - Francesco Stellato
- Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Roma, Italy
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2
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Malikidogo KP, Drommi M, Atrián-Blasco E, Hormann J, Kulak N, Esmieu C, Hureau C. Ability of Azathiacyclen Ligands To Stop Cu(Aβ)-Induced Production of Reactive Oxygen Species: [3N1S] Is the Right Donor Set. Chemistry 2023; 29:e202203667. [PMID: 36606721 DOI: 10.1002/chem.202203667] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 01/07/2023]
Abstract
Alzheimer's disease (AD) is an incurable neurodegenerative disease that leads to the progressive and irreversible loss of mental functions. The amyloid beta (Aβ) peptide involved in the disease is responsible for the production of damaging reactive oxygen species (ROS) when bound to Cu ions. A therapeutic approach that consists of removing Cu ions from Aβ to alter this deleterious interaction is currently being developed. In this context, we report the ability of five different 12-membered thiaazacyclen ligands to capture Cu from Aβ and to redox silence it. We propose that the presence of a sole sulfur atom in the ligand increases the rate of Cu capture and removal from Aβ, while the kinetic aspect of the chelation was an issue encountered with the 4N parent ligand. The best ligand for removing Cu from Aβ and inhibiting the associated ROS production is the 1-thia-4,7,10-triazacyclododecane [3N1S]. Indeed the replacement of more N by S atoms makes the corresponding Cu complexes easier to reduce and thus able to produce ROS on their own. In addition, the ligand with three sulfur atoms has a weaker affinity for CuII than Aβ, and is thus unable to remove Cu from CuAβ.
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Affiliation(s)
- Kyangwi P Malikidogo
- LCC-CNRS, Université de Toulouse, CNRS, 31400, Toulouse, France.,Université Grenoble Alpes, DCM (UMR 5250) - CNRS and CEA, IRIG, LCBM (UMR, 5249, Grenoble, France
| | - Marielle Drommi
- LCC-CNRS, Université de Toulouse, CNRS, 31400, Toulouse, France
| | - Elena Atrián-Blasco
- LCC-CNRS, Université de Toulouse, CNRS, 31400, Toulouse, France.,Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Jan Hormann
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Nora Kulak
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.,Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Charlène Esmieu
- LCC-CNRS, Université de Toulouse, CNRS, 31400, Toulouse, France
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Hoffman DJ, Van Driel TB, Kroll T, Crissman CJ, Ryland ES, Nelson KJ, Cordones AA, Koralek JD, DePonte DP. Microfluidic liquid sheets as large-area targets for high repetition XFELs. Front Mol Biosci 2022; 9:1048932. [PMID: 36567947 PMCID: PMC9780453 DOI: 10.3389/fmolb.2022.1048932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/18/2022] [Indexed: 12/13/2022] Open
Abstract
The high intensity of X-ray free electron lasers (XFELs) can damage solution-phase samples on every scale, ranging from the molecular or electronic structure of a sample to the macroscopic structure of a liquid microjet. By using a large surface area liquid sheet microjet as a sample target instead of a standard cylindrical microjet, the incident X-ray spot size can be increased such that the incident intensity falls below the damage threshold. This capability is becoming particularly important for high repetition rate XFELs, where destroying a target with each pulse would require prohibitively large volumes of sample. We present here a study of microfluidic liquid sheet dimensions as a function of liquid flow rate. Sheet lengths, widths and thickness gradients are shown for three styles of nozzles fabricated from isotropically etched glass. In-vacuum operation and sample recirculation using these nozzles is demonstrated. The effects of intense XFEL pulses on the structure of a liquid sheet are also briefly examined.
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Affiliation(s)
- David J. Hoffman
- SLAC National Accelerator Laboratory, Menlo Park, CA, United States
| | - Tim B. Van Driel
- SLAC National Accelerator Laboratory, Menlo Park, CA, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
| | - Christopher J. Crissman
- SLAC National Accelerator Laboratory, Menlo Park, CA, United States,United States Military Academy, West Point, NY, United States
| | - Elizabeth S. Ryland
- SLAC National Accelerator Laboratory, Stanford PULSE Institute, Menlo Park, CA, United States
| | - Kacie J. Nelson
- SLAC National Accelerator Laboratory, Stanford PULSE Institute, Menlo Park, CA, United States
| | - Amy A. Cordones
- SLAC National Accelerator Laboratory, Stanford PULSE Institute, Menlo Park, CA, United States
| | - Jake D. Koralek
- SLAC National Accelerator Laboratory, Menlo Park, CA, United States
| | - Daniel P. DePonte
- SLAC National Accelerator Laboratory, Menlo Park, CA, United States,*Correspondence: Daniel P. DePonte,
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4
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de Melo Costa-Serge N, Gonçalves RGL, Rojas-Mantilla HD, Santilli CV, Hammer P, Nogueira RFP. Fenton-like degradation of sulfathiazole using copper-modified MgFe-CO 3 layered double hydroxide. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125388. [PMID: 33930955 DOI: 10.1016/j.jhazmat.2021.125388] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/20/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
The catalytic activity of layered double hydroxides, with and without insertion of copper, was evaluated in a heterogeneous Fenton process for degradation of the antibiotic sulfathiazole (STZ). The characterizations with different techniques revealed lamellar structures formed by stacking of layers containing magnesium, iron, and copper cations. The insertion of copper in the lamellar structure increased the specific area of the material and the degradation kinetics, achieving complete STZ removal after 90 min. X-ray photoelectron spectroscopy analysis showed the presence of Cu(II) and Cu(I) surface sites, which contributed to the generation of hydroxyl and hydroperoxyl/superoxide radicals. It also indicated an increase of Cu(I) content after use. For both materials, but specially for LDH without copper, addition of tert-butyl alcohol and p-benzoquinone hindered STZ degradation, indicating the importance of hydroxyl and hydroperoxyl/superoxide radicals in the degradation process, respectively. These results demonstrated the potential of copper-modified MgFe-CO3 as a catalyst for the degradation of emerging contaminants, offering the benefits of easy preparation and high efficiency in the Fenton process.
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Affiliation(s)
- Nayara de Melo Costa-Serge
- São Paulo State University (UNESP), Institute of Chemistry, 14800-900 Araraquara, SP, Brazil; UNESP, National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT - DATREM), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
| | | | - Hernán Dario Rojas-Mantilla
- São Paulo State University (UNESP), Institute of Chemistry, 14800-900 Araraquara, SP, Brazil; UNESP, National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT - DATREM), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
| | - Celso Valentim Santilli
- São Paulo State University (UNESP), Institute of Chemistry, 14800-900 Araraquara, SP, Brazil.
| | - Peter Hammer
- São Paulo State University (UNESP), Institute of Chemistry, 14800-900 Araraquara, SP, Brazil.
| | - Raquel Fernandes Pupo Nogueira
- São Paulo State University (UNESP), Institute of Chemistry, 14800-900 Araraquara, SP, Brazil; UNESP, National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT - DATREM), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
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Best SP, Streltsov VA, Chantler CT, Li W, Ash PA, Hayama S, Diaz-Moreno S. Redox state and photoreduction control using X-ray spectroelectrochemical techniques - advances in design and fabrication through additive engineering. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:472-479. [PMID: 33650559 DOI: 10.1107/s1600577520016021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
The design and performance of an electrochemical cell and solution flow system optimized for the collection of X-ray absorption spectra from solutions of species sensitive to photodamage is described. A combination of 3D CAD and 3D printing techniques facilitates highly optimized design with low unit cost and short production time. Precise control of the solution flow is critical to both minimizing the volume of solution needed and minimizing the photodamage that occurs during data acquisition. The details of an integrated four-syringe stepper-motor-driven pump and associated software are described. It is shown that combined electrochemical and flow control can allow repeated measurement of a defined volume of solution, 100 µl, of samples sensitive to photoreduction without significant change to the X-ray absorption near-edge structure and is demonstrated by measurements of copper(II) complexes. The flow in situ electrochemical cell allows the collection of high-quality X-ray spectral measurements both in the near-edge region and over an extended energy region as is needed for structural analysis from solution samples. This approach provides control over photodamage at a level at least comparable with that achieved using cryogenic techniques and at the same time eliminates problems associated with interference due to Bragg peaks.
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Affiliation(s)
- Stephen Peter Best
- School of Chemistry, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Victor A Streltsov
- Florey Department of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | | | - Wangzhe Li
- Department of Chemistry, University of Oxford, Oxford OX1 3QR, United Kingdom
| | - Philip A Ash
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, United Kingdom
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Pushie MJ, Stefaniak E, Sendzik MR, Sokaras D, Kroll T, Haas KL. Using N-Terminal Coordination of Cu(II) and Ni(II) to Isolate the Coordination Environment of Cu(I) and Cu(II) Bound to His13 and His14 in Amyloid-β(4-16). Inorg Chem 2019; 58:15138-15154. [PMID: 31657204 DOI: 10.1021/acs.inorgchem.9b01940] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The amyloid-β (Aβ) peptide is a cleavage product of the amyloid precursor protein and has been implicated as a central player in Alzheimer's disease. The N-terminal end of Aβ is variable, and different proportions of these variable-length Aβ peptides are present in healthy individuals and those with the disease. The N-terminally truncated form of Aβ starting at position 4 (Aβ4-x) has a His residue as the third amino acid (His6 using the formal Aβ numbering). The N-terminal sequence Xaa-Xaa-His is known as an amino terminal copper and nickel binding motif (ATCUN), which avidly binds Cu(II). This motif is not present in the commonly studied Aβ1-x peptides. In addition to the ATCUN site, Aβ4-x contains an additional metal binding site located at the tandem His residues (bis-His at His13 and 14) which is also found in other isoforms of Aβ. Using the ATCUN and bis-His motifs, the Aβ4-x peptide is capable of binding multiple metal ions simultaneously. We confirm that Cu(II) bound to this particular ATCUN site is redox silent, but the second Cu(II) site is redox active and can be readily reduced with ascorbate. We have employed surrogate metal ions to block copper coordination at the ATCUN or the tandem His site in order to isolate spectral features of the copper coordination environment for structural characterization using extended X-ray absorption fine structure (EXAFS) spectroscopy. This approach reveals that each copper coordination environment is independent in the Cu2Aβ4-x state. The identification of two functionally different copper binding environments within the Aβ4-x sequence may have important implications for this peptide in vivo.
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Affiliation(s)
- M Jake Pushie
- Department of Surgery , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5E5 , Canada
| | - Ewelina Stefaniak
- Department of Chemistry and Physics , Saint Mary's College , Notre Dame , Indiana 46556 , United States.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| | - Madison R Sendzik
- Department of Chemistry and Physics , Saint Mary's College , Notre Dame , Indiana 46556 , United States
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource , SLAC National Accelerator Laboratory , 2575 Sand Hill Road , Menlo Park , California 94025 , United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource , SLAC National Accelerator Laboratory , 2575 Sand Hill Road , Menlo Park , California 94025 , United States
| | - Kathryn L Haas
- Department of Chemistry and Physics , Saint Mary's College , Notre Dame , Indiana 46556 , United States
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