1
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Senapati S, Secchi V, Cova F, Richman M, Villa I, Yehuda R, Shenberger Y, Campione M, Rahimipour S, Monguzzi A. Noninvasive Treatment of Alzheimer's Disease with Scintillating Nanotubes. Adv Healthc Mater 2023; 12:e2301527. [PMID: 37826854 DOI: 10.1002/adhm.202301527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/28/2023] [Indexed: 10/14/2023]
Abstract
Effective and accessible treatments for Alzheimer's disease (AD) are urgently needed. Soluble Aβ oligomers are identified as neurotoxic species in AD and targeted in antibody-based drug development to mitigate cognitive decline. However, controversy exists concerning their efficacy and safety. In this study, an alternative strategy is proposed to inhibit the formation of Aβ oligomers by selectively oxidizing specific amino acids in the Aβ sequence, thereby preventing its aggregation. Targeted oxidation is achieved using biocompatible and blood-brain barrier-permeable multicomponent nanoscintillators that generate singlet oxygen upon X-ray interaction. Surface-modified scintillators interact selectively with Aβ and, upon X-ray irradiation, inhibit the formation of neurotoxic aggregates both in vitro and in vivo. Feeding transgenic Caenorhabditis elegans expressing human Aβ with the nanoscintillators and subsequent irradiation with soft X-ray reduces Aβ oligomer levels, extends lifespan, and restores memory and behavioral deficits. These findings support the potential of X-ray-based therapy for AD and warrant further development.
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Affiliation(s)
- Sudipta Senapati
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Valeria Secchi
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milan, 20125, Italy
| | - Francesca Cova
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milan, 20125, Italy
| | - Michal Richman
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Irene Villa
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milan, 20125, Italy
| | - Ronen Yehuda
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Yulia Shenberger
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Marcello Campione
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 4, Milan, 20126, Italy
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Angelo Monguzzi
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milan, 20125, Italy
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2
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Ortigosa-Pascual L, Leiding T, Linse S, Pálmadóttir T. Photo-Induced Cross-Linking of Unmodified α-Synuclein Oligomers. ACS Chem Neurosci 2023; 14:3192-3205. [PMID: 37621159 PMCID: PMC10485903 DOI: 10.1021/acschemneuro.3c00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
Photo-induced cross-linking of unmodified proteins (PICUP) has been used in the past to study size distributions of protein assemblies. PICUP may, for example, overcome the significant experimental challenges related to the transient nature, heterogeneity, and low concentration of amyloid protein oligomers relative to monomeric and fibrillar species. In the current study, a reaction chamber was designed, produced, and used for PICUP reaction optimization in terms of reaction conditions and lighting time from ms to s. These efforts make the method more reproducible and accessible and enable the use of shorter reaction times compared to previous studies. We applied the optimized method to an α-synuclein aggregation time course to monitor the relative concentration and size distribution of oligomers over time. The data are compared to the time evolution of the fibril mass concentration, as monitored by thioflavin T fluorescence. At all time points, the smaller the oligomer, the higher its concentration observed after PICUP. Moreover, the total oligomer concentration is highest at short aggregation times, and the decline over time follows the disappearance of monomers. We can therefore conclude that these oligomers form from monomers.
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Affiliation(s)
- Lei Ortigosa-Pascual
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Thom Leiding
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Sara Linse
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Tinna Pálmadóttir
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
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3
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Umeda H, Sawazaki T, Furuta M, Suzuki T, Kawashima SA, Mitsunuma H, Hori Y, Tomita T, Sohma Y, Kanai M. Quantitative Assays for Catalytic Photo-Oxygenation of Alzheimer Disease-Related Tau Proteins. ACS Chem Neurosci 2023; 14:2710-2716. [PMID: 37470225 DOI: 10.1021/acschemneuro.3c00264] [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: 07/21/2023] Open
Abstract
Catalytic photo-oxygenation of tau amyloid is a potential therapeutic approach to tauopathies, including Alzheimer disease (AD). However, tau is a complex target containing great molecular size and heterogeneous isoforms/proteoforms. Although catalytic photo-oxygenation has been confirmed when using catalyst 1 and recombinant tau pretreated with heparin, its effects on tau from human patients have not yet been clarified. In this study, focusing on the histidine residues being oxygenated, we have constructed two assay systems capable of quantitatively evaluating the catalytic activity when used on human patient tau: (1) fluorescence labeling at oxygenated histidine sites and (2) LC-MS/MS analysis of histidine-containing fragments. Using these assays, we identified 2 as a promising catalyst for oxygenation of human tau. In addition, our results suggest that aggregated tau induced by heparin is different from actual AD patient tau in developing effective photo-oxygenation catalysts.
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Affiliation(s)
- Hiroki Umeda
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Taka Sawazaki
- School of Pharmaceutical Sciences, Wakayama Medical University, Wakayama 640-8156, Japan
| | - Masahiro Furuta
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Takanobu Suzuki
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Shigehiro A Kawashima
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Harunobu Mitsunuma
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yukiko Hori
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Taisuke Tomita
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Youhei Sohma
- School of Pharmaceutical Sciences, Wakayama Medical University, Wakayama 640-8156, Japan
| | - Motomu Kanai
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
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4
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Hou T, Shao X, Ding M, Mei K, Wang X, Guan P, Hu X. Photooxidative inhibition and decomposition of β-amyloid in Alzheimer's by nano-assemblies of transferrin and indocyanine green. Int J Biol Macromol 2023; 241:124432. [PMID: 37086772 DOI: 10.1016/j.ijbiomac.2023.124432] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/30/2023] [Accepted: 04/09/2023] [Indexed: 04/24/2023]
Abstract
Photoinduced modulation of Aβ42 aggregation has emerged as a therapeutic option for treating Alzheimer's disease (AD) due to its high spatiotemporal controllability, noninvasive nature, and low systemic toxicity. However, existing photo-oxidants have the poor affinity for Aβ42, low depolymerization efficiency, and difficulty in crossing the blood-brain barrier (BBB), hindering their application in the treatment of AD. Here, through hydrophobic interactions and hydrogen bonding, we integrated the near-infrared (NIR) photosensitizer indocyanine green with transferrin (denoted as TF-ICG), a protein with a high affinity for Aβ42, and demonstrated its anti-amyloid activity in vitro. TF-ICG was shown to bind to Aβ42 residues via hydrophobic interaction, impeding π-π stacking of Aβ42 peptide monomers and disassembling mature Aβ42 protofibrils in a concentration-dependent manner. More importantly, under NIR (808 nm, 0.6w/cm2) irradiation, TF-ICG completely inhibited the fibrillation process of Aβ42 to generate amorphous aggregates, with an inhibition rate of 96 % at only 65 nM. Meanwhile, TF-ICG could photo-oxidize rigid Aβ42 aggregates and break them down into small amorphous structures. Tyrosine fluorescence assay further demonstrated the intrinsic affinity and targeting of TF-ICG to Aβ42 fibrils. In vitro studies validated the anti-amyloid activity of TF-ICG, which provided a theoretical basis for further in vivo application as a BBB-penetrating nanotherapeutic platform.
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Affiliation(s)
- Tongtong Hou
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - Xu Shao
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - Minling Ding
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - Kun Mei
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - Xin Wang
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China
| | - Ping Guan
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
| | - Xiaoling Hu
- Department of Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
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5
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Jiang Y, Zeng Z, Yao J, Guan Y, Jia P, Zhao X, Xu L. Treatment of Alzheimer's disease with small-molecule photosensitizers. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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6
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Klose D, Vemulapalli SPB, Richman M, Rudnick S, Aisha V, Abayev M, Chemerovski M, Shviro M, Zitoun D, Majer K, Wili N, Goobes G, Griesinger C, Jeschke G, Rahimipour S. Cu 2+-Induced self-assembly and amyloid formation of a cyclic D,L-α-peptide: structure and function. Phys Chem Chem Phys 2022; 24:6699-6715. [PMID: 35234757 DOI: 10.1039/d1cp05415e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In a wide spectrum of neurodegenerative diseases, self-assembly of pathogenic proteins to cytotoxic intermediates is accelerated by the presence of metal ions such as Cu2+. Only low concentrations of these early transient oligomeric intermediates are present in a mixture of species during fibril formation, and hence information on the extent of structuring of these oligomers is still largely unknown. Here, we investigate dimers as the first intermediates in the Cu2+-driven aggregation of a cyclic D,L-α-peptide architecture. The unique structural and functional properties of this model system recapitulate the self-assembling properties of amyloidogenic proteins including β-sheet conformation and cross-interaction with pathogenic amyloids. We show that a histidine-rich cyclic D,L-α-octapeptide binds Cu2+ with high affinity and selectivity to generate amyloid-like cross-β-sheet structures. By taking advantage of backbone amide methylation to arrest the self-assembly at the dimeric stage, we obtain structural information and characterize the degree of local order for the dimer. We found that, while catalytic amounts of Cu2+ promote aggregation of the peptide to fibrillar structures, higher concentrations dose-dependently reduce fibrillization and lead to formation of spherical particles, showing self-assembly to different polymorphs. For the initial self-assembly step to the dimers, we found that Cu2+ is coordinated on average by two histidines, similar to self-assembled peptides, indicating that a similar binding interface is perpetuated during Cu2+-driven oligomerization. The dimer itself is found in heterogeneous conformations that undergo dynamic exchange, leading to the formation of different polymorphs at the initial stage of the aggregation process.
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Affiliation(s)
- Daniel Klose
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Sahithya Phani Babu Vemulapalli
- NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany. .,Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, 26129 Oldenburg, Germany
| | - Michal Richman
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Safra Rudnick
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Vered Aisha
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Meital Abayev
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Marina Chemerovski
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Meital Shviro
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - David Zitoun
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Katharina Majer
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Nino Wili
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Gil Goobes
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Christian Griesinger
- NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
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7
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Sohma Y, Sawazaki T, Kanai M. Chemical catalyst-promoted photooxygenation of amyloid proteins. Org Biomol Chem 2021; 19:10017-10029. [PMID: 34787628 DOI: 10.1039/d1ob01677f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Misfolded proteins produce aberrant fibrillar aggregates, called amyloids, which contain cross-β-sheet higher order structures. The species generated in the aggregation process (i.e., oligomers, protofibrils, and fibrils) are cytotoxic and can cause various diseases. Interfering with the amyloid formation of proteins could be a drug development target for treating diseases caused by aberrant protein aggregation. In this review, we introduce a variety of chemical catalysts that oxygenate amyloid proteins under light irradiation using molecular oxygen as the oxygen atom donor (i.e., photooxygenation catalysts). Catalytic photooxygenation strongly inhibits the aggregation of amyloid proteins due to covalent installation of hydrophilic oxygen atoms and attenuates the neurotoxicity of the amyloid proteins. Recent in vivo studies in disease model animals using photooxygenation catalysts showed promising therapeutic effects, such as memory improvement and lifespan extension. Moreover, photooxygenation catalysts with new modes of action, including interference with the propagation of amyloid core seeds and enhancement in the metabolic clearance of amyloids in the brain, have begun to be identified. Manipulation of catalytic photooxygenation with secured amyloid selectivity is indispensable for minimizing the side effects in clinical application. Here we describe several strategies for designing catalysts that selectively photooxygenate amyloids without reacting with other non-amyloid biomolecules.
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Affiliation(s)
- Youhei Sohma
- School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichiban-cho, Wakayama 640-8156, Japan.
| | - Taka Sawazaki
- School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichiban-cho, Wakayama 640-8156, Japan. .,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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8
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Ramesh M, Acharya A, Murugan NA, Ila H, Govindaraju T. Thiophene-Based Dual Modulators of Aβ and Tau Aggregation. Chembiochem 2021; 22:3348-3357. [PMID: 34546619 DOI: 10.1002/cbic.202100383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/21/2021] [Indexed: 01/29/2023]
Abstract
Alzheimer's disease is characterized by the accumulation of amyloid beta (Aβ) and Tau aggregates in the brain, which induces various pathological events resulting in neurodegeneration. There have been continuous efforts to develop modulators of the Aβ and Tau aggregation process to halt or modify disease progression. A few small-molecule-based inhibitors that target both Aβ and Tau pathology have been reported. Here, we report the screening of a targeted library of small molecules to modulate Aβ and Tau aggregation together with their in vitro, in silico and cellular studies. In vitro ThT fluorescence assay, dot blot assay, gel electrophoresis and transmission electron microscopy (TEM) results have shown that thiophene-based lead molecules effectively modulate Aβ aggregation and inhibit Tau aggregation. In silico studies performed by employing molecular docking, molecular dynamics and binding-free energy calculations have helped in understanding the mechanism of interaction of the lead thiophene compounds with Aβ and Tau fibril targets. In cellulo studies revealed that the lead candidate is biocompatible and effectively ameliorates neuronal cells from Aβ and Tau-mediated amyloid toxicity.
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Affiliation(s)
- Madhu Ramesh
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - N Arul Murugan
- Department of Computer Science, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - Thimmaiah Govindaraju
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
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9
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Lechner VM, Nappi M, Deneny PJ, Folliet S, Chu JCK, Gaunt MJ. Visible-Light-Mediated Modification and Manipulation of Biomacromolecules. Chem Rev 2021; 122:1752-1829. [PMID: 34546740 DOI: 10.1021/acs.chemrev.1c00357] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chemically modified biomacromolecules-i.e., proteins, nucleic acids, glycans, and lipids-have become crucial tools in chemical biology. They are extensively used not only to elucidate cellular processes but also in industrial applications, particularly in the context of biopharmaceuticals. In order to enable maximum scope for optimization, it is pivotal to have a diverse array of biomacromolecule modification methods at one's disposal. Chemistry has driven many significant advances in this area, and especially recently, numerous novel visible-light-induced photochemical approaches have emerged. In these reactions, light serves as an external source of energy, enabling access to highly reactive intermediates under exceedingly mild conditions and with exquisite spatiotemporal control. While UV-induced transformations on biomacromolecules date back decades, visible light has the unmistakable advantage of being considerably more biocompatible, and a spectrum of visible-light-driven methods is now available, chiefly for proteins and nucleic acids. This review will discuss modifications of native functional groups (FGs), including functionalization, labeling, and cross-linking techniques as well as the utility of oxidative degradation mediated by photochemically generated reactive oxygen species. Furthermore, transformations at non-native, bioorthogonal FGs on biomacromolecules will be addressed, including photoclick chemistry and DNA-encoded library synthesis as well as methods that allow manipulation of the activity of a biomacromolecule.
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Affiliation(s)
- Vivian M Lechner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Manuel Nappi
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Patrick J Deneny
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Sarah Folliet
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - John C K Chu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J Gaunt
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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10
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Son SH, Do JM, Yoo JN, Lee HW, Kim NK, Yoo HS, Gee MS, Kim JH, Seong JH, Inn KS, Seo MD, Lee JK, Kim NJ. Identification of ortho catechol-containing isoflavone as a privileged scaffold that directly prevents the aggregation of both amyloid β plaques and tau-mediated neurofibrillary tangles and its in vivo evaluation. Bioorg Chem 2021; 113:105022. [PMID: 34098397 DOI: 10.1016/j.bioorg.2021.105022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 04/03/2021] [Accepted: 05/23/2021] [Indexed: 12/15/2022]
Abstract
In this study, polyhydroxyisoflavones that directly prevent the aggregation of both amyloid β (Aβ) and tau were expediently synthesized via divergent Pd(0)-catalyzed Suzuki-Miyaura coupling and then biologically evaluated. By preliminary structure-activity relationship studies using thioflavin T (ThT) assays, an ortho-catechol containing isoflavone scaffold was proven to be crucial for preventing both Aβ aggregation and tau-mediated neurofibrillary tangle formation. Additional TEM experiment confirmed that ortho-catechol containing isoflavone 4d significantly prevented the aggregation of both Aβ and tau. To investigate the mode of action (MOA) of 4d, which possesses an ortho-catechol moiety, 1H-15N HSQC NMR analysis was thoroughly performed and the result indicated that 4d could directly inhibit both the formation of Aβ42 fibrils and the formation of tau-derived neurofibrils, probably through the catechol-mediated nucleation of tau. Finally, 4d was demonstrated to alleviate cognitive impairment and pathologies related to Alzheimer's disease in a 5XFAD transgenic mouse model.
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Affiliation(s)
- Seung Hwan Son
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ji Min Do
- Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ji-Na Yoo
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea; Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Hyun Woo Lee
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Nam Kwon Kim
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Hyung-Seok Yoo
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Min Sung Gee
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jong-Ho Kim
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ji Hye Seong
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Kyung-Soo Inn
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Min-Duk Seo
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea; Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea.
| | - Jong Kil Lee
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Nam-Jung Kim
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
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11
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Interrogating biological systems using visible-light-powered catalysis. Nat Rev Chem 2021; 5:322-337. [PMID: 37117838 DOI: 10.1038/s41570-021-00265-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2021] [Indexed: 12/12/2022]
Abstract
Light-powered catalysis has found broad utility as a chemical transformation strategy, with widespread impact on energy, environment, drug discovery and human health. A noteworthy application impacting human health is light-induced sensitization of cofactors for photodynamic therapy in cancer treatment. The clinical adoption of this photosensitization approach has inspired the search for other photochemical methods, such as photoredox catalysis, to influence biological discovery. Over the past decade, light-mediated catalysis has enabled the discovery of valuable synthetic transformations, propelling it to become a highly utilized chemical synthesis strategy. The reaction components required to achieve a photoredox reaction are identical to photosensitization (catalyst, light source and substrate), making it ideally suited for probing biological environments. In this Review, we discuss the therapeutic application of photosensitization and advancements made in developing next-generation catalysts. We then highlight emerging uses of photoredox catalytic methods for protein bioconjugation and probing complex cellular environments in living cells.
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12
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Nagashima N, Ozawa S, Furuta M, Oi M, Hori Y, Tomita T, Sohma Y, Kanai M. Catalytic photooxygenation degrades brain Aβ in vivo. SCIENCE ADVANCES 2021; 7:7/13/eabc9750. [PMID: 33762329 PMCID: PMC7990327 DOI: 10.1126/sciadv.abc9750] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
Protein degradation induced by small molecules by recruiting endogenous protein degradation systems, such as ubiquitin-proteasome systems, to disease-related proteins is an emerging concept to inhibit the function of undruggable proteins. Protein targets without reliable ligands and/or existing outside the cells where ubiquitin-proteasome systems do not exist, however, are beyond the scope of currently available protein degradation strategies. Here, we disclose photooxygenation catalyst 7 that permeates the blood-brain barrier and selectively and directly degrades an extracellular Alzheimer's disease-related undruggable protein, amyloid-β protein (Aβ). Key was the identification of a compact but orange color visible light-activatable chemical catalyst whose activity can be switched on/off according to its molecular mobility, thereby ensuring high selectivity for aggregated Aβ. Chemical catalyst-promoted protein degradation can be applied universally for attenuating extracellular amyloids and various pathogenic proteins and is thus a new entry to induced protein degradation strategies.
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Affiliation(s)
- Nozomu Nagashima
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shuta Ozawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masahiro Furuta
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Miku Oi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yukiko Hori
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Taisuke Tomita
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Youhei Sohma
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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13
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Pu Y, Zhu Y, Qiao Z, Xin N, Chen S, Sun J, Jin R, Nie Y, Fan H. A Gd-doped polydopamine (PDA)-based theranostic nanoplatform as a strong MR/PA dual-modal imaging agent for PTT/PDT synergistic therapy. J Mater Chem B 2021; 9:1846-1857. [PMID: 33527969 DOI: 10.1039/d0tb02725a] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Based on widely used photoacoustic imaging (PAI) and photothermal properties of polydopamine (PDA), a multifunctional Gd-PDA-Ce6@Gd-MOF (GPCG) nanosystem with a core-shell structure and strong imaging ability was constructed. Benefitting from the metal-organic framework (MOF) structure, GPCG nanoparticles (NPs) showed enhanced magnetic resonance imaging (MRI) ability with high relaxation rates (r1 = 13.72 mM-1 s-1 and r2 = 216.14 mM-1 s-1). The MRI effect of Gd ions combined with the PAI effect of PDA, giving GPCG NPs a dual-modal imaging ability. The core, mainly composed of PDA and photodynamic photosensitizer chlorin e6 (Ce6), achieved photothermal/photodynamic therapy (PTT/PDT) synergistic performance. Besides, to overcome the unexpected release of Ce6, the MOF shell realized pH-sensitive release and a high local concentration. Through in vivo studies, we concluded that GPCG NPs show a good inhibitory effect on tumor growth. In conclusion, we successfully obtained a GPCG theranostic nanoplatform and paved the way for subsequent design of imaging guided therapeutic nanostructures based on metal-doped PDA.
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Affiliation(s)
- Yiyao Pu
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yuda Zhu
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Zi Qiao
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Nini Xin
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Suping Chen
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Jing Sun
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Rongrong Jin
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yu Nie
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
| | - Hongsong Fan
- National Engineering Research Centre for Biomaterials, Sichuan University, Chengdu 610064, P. R. China. and College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
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14
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Irmania N, Dehvari K, Gedda G, Tseng P, Chang J. Manganese‐doped green tea‐derived carbon quantum dots as a targeted dual imaging and photodynamic therapy platform. J Biomed Mater Res B Appl Biomater 2020; 108:1616-1625. [DOI: 10.1002/jbm.b.34508] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 09/04/2019] [Accepted: 09/22/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Novi Irmania
- Department of Chemical EngineeringNational Taiwan University of Science and Technology Taipei Taiwan, ROC
| | - Khalilalrahman Dehvari
- Department of Chemical EngineeringNational Taiwan University of Science and Technology Taipei Taiwan, ROC
| | - Gangaraju Gedda
- Department of ChemistrySchool of Science, GITAM deemed to be University Rudraram Patancheru Mandal, Hyderabad, Telangana, Sangareddy District India
| | - Po‐Jen Tseng
- Department of Safety Health and Environmental EngineeringNational Yunlin University of Science and Technology Yunlin Taiwan, ROC
| | - Jia‐Yaw Chang
- Department of Chemical EngineeringNational Taiwan University of Science and Technology Taipei Taiwan, ROC
- Taiwan Building Technology CenterNational Taiwan University of Science and Technology Taipei Taiwan, ROC
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15
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Friedemann M, Tõugu V, Palumaa P. Copper(II) partially protects three histidine residues and the N-terminus of amyloid-β peptide from diethyl pyrocarbonate (DEPC) modification. FEBS Open Bio 2020; 10:1072-1081. [PMID: 32255544 PMCID: PMC7262909 DOI: 10.1002/2211-5463.12857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 03/09/2020] [Accepted: 03/31/2020] [Indexed: 11/07/2022] Open
Abstract
Diethyl pyrocarbonate (DEPC) has been primarily used as a residue‐specific modifying agent to study the role of His residues in peptide/protein and enzyme function; however, its action is not specific, and several other residues can also be modified. In the current study, we monitored the reaction of DEPC with amyloid‐beta (Aβ) peptides and insulin by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) and determined the modification sites by electrospray ionization quadrupole time‐of‐flight tandem MS (ESI Q‐TOF MS/MS). Our results indicate that five residues in Aβ1–42 are modified in the presence of 30‐fold molar excess of DEPC. After hydroxylamine treatment (which removes modifications from three His residues), two labels remain bound at the peptide N terminus and Lys16. DEPC treatment of Aβ1–42 promotes peptide aggregation, as monitored through the loss of soluble Aβ42 in a semi‐quantitative MALDI‐TOF MS assay. It has been previously proposed that Cu(II) ions protect Aβ1–16 from DEPC modification through binding to His6. We confirmed that Cu(II) ions decrease the stoichiometry of Aβ1–16 modification with the excess of DEPC being lower as compared to the control, which indicates that Cu(II) protects Aβ from DEPC modification. Sequencing of obtained Cu(II)‐protected Aβ1–16 samples showed that Cu(II) does not protect any residues completely, but partially protects all three His residues and the N terminus. Thus, the protection by Cu(II) ions is not related to specific metal binding to a particular residue (e.g. His6), but rather all His residues and the N terminus are involved in binding of Cu(II) ions. These results allow us to elucidate the effect of DEPC modification on amyloidogenity of human Aβ and to speculate about the role of His residues in these processes.
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Affiliation(s)
- Merlin Friedemann
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Estonia
| | - Vello Tõugu
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Estonia
| | - Peep Palumaa
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Estonia
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16
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Manzhos S. Machine learning for the solution of the Schrödinger equation. MACHINE LEARNING-SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1088/2632-2153/ab7d30] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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De Simone A, Naldi M, Tedesco D, Bartolini M, Davani L, Andrisano V. Advanced analytical methodologies in Alzheimer’s disease drug discovery. J Pharm Biomed Anal 2020; 178:112899. [DOI: 10.1016/j.jpba.2019.112899] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 12/13/2022]
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18
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Wallin C, Friedemann M, Sholts SB, Noormägi A, Svantesson T, Jarvet J, Roos PM, Palumaa P, Gräslund A, Wärmländer SKTS. Mercury and Alzheimer's Disease: Hg(II) Ions Display Specific Binding to the Amyloid-β Peptide and Hinder Its Fibrillization. Biomolecules 2019; 10:E44. [PMID: 31892131 PMCID: PMC7022868 DOI: 10.3390/biom10010044] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023] Open
Abstract
Brains and blood of Alzheimer's disease (AD) patients have shown elevated mercury concentrations, but potential involvement of mercury exposure in AD pathogenesis has not been studied at the molecular level. The pathological hallmark of AD brains is deposition of amyloid plaques, consisting mainly of amyloid-β (Aβ) peptides aggregated into amyloid fibrils. Aβ peptide fibrillization is known to be modulated by metal ions such as Cu(II) and Zn(II). Here, we study in vitro the interactions between Aβ peptides and Hg(II) ions by multiple biophysical techniques. Fluorescence spectroscopy and atomic force microscopy (AFM) show that Hg(II) ions have a concentration-dependent inhibiting effect on Aβ fibrillization: at a 1:1 Aβ·Hg(II) ratio only non-fibrillar Aβ aggregates are formed. NMR spectroscopy shows that Hg(II) ions interact with the N-terminal region of Aβ(1-40) with a micromolar affinity, likely via a binding mode similar to that for Cu(II) and Zn(II) ions, i.e., mainly via the histidine residues His6, His13, and His14. Thus, together with Cu(II), Fe(II), Mn(II), Pb(IV), and Zn(II) ions, Hg(II) belongs to a family of metal ions that display residue-specific binding interactions with Aβ peptides and modulate their aggregation processes.
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Affiliation(s)
- Cecilia Wallin
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Merlin Friedemann
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Sabrina B. Sholts
- Department of Anthropology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA;
| | - Andra Noormägi
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Teodor Svantesson
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Jüri Jarvet
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
- The National Institute of Chemical Physics and Biophysics, 12618 Tallinn, Estonia
| | - Per M. Roos
- Institute of Environmental Medicine, Karolinska Institutet, 16765 Stockholm, Sweden;
- Department of Clinical Physiology, Capio St. Göran Hospital, 11219 Stockholm, Sweden
| | - Peep Palumaa
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Astrid Gräslund
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Sebastian K. T. S. Wärmländer
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
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19
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Bondia P, Torra J, Tone CM, Sawazaki T, del Valle A, Sot B, Nonell S, Kanai M, Sohma Y, Flors C. Nanoscale View of Amyloid Photodynamic Damage. J Am Chem Soc 2019; 142:922-930. [DOI: 10.1021/jacs.9b10632] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Patricia Bondia
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
| | - Joaquim Torra
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
| | - Caterina M. Tone
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
| | - Taka Sawazaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Adrián del Valle
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
| | - Begoña Sot
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
| | - Santi Nonell
- Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, Barcelona 08017, Spain
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Youhei Sohma
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Cristina Flors
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), C/Faraday 9, Madrid 28049, Spain
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20
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Membrane intercalation-enhanced photodynamic inactivation of bacteria by a metallacycle and TAT-decorated virus coat protein. Proc Natl Acad Sci U S A 2019; 116:23437-23443. [PMID: 31685638 DOI: 10.1073/pnas.1911869116] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Antibiotic resistance has become one of the major threats to global health. Photodynamic inactivation (PDI) develops little antibiotic resistance; thus, it becomes a promising strategy in the control of bacterial infection. During a PDI process, light-induced reactive oxygen species (ROS) damage the membrane components, leading to the membrane rupture and bacteria death. Due to the short half-life and reaction radius of ROS, achieving the cell-membrane intercalation of photosensitizers is a key challenge for PDI of bacteria. In this work, a tetraphenylethylene-based discrete organoplatinum(II) metallacycle (1) acts as a photosensitizer with aggregation-induced emission. It self-assembles with a transacting activator of transduction (TAT) peptide-decorated virus coat protein (2) through electrostatic interactions. This assembly (3) exhibits both ROS generation and strong membrane-intercalating ability, resulting in significantly enhanced PDI efficiency against bacteria. By intercalating in the bacterial cell membrane or entering the bacteria, assembly 3 decreases the survival rate of gram-negative Escherichia coli to nearly zero and that of gram-positive Staphylococcus aureus to ∼30% upon light irradiation. This study has wide implications from the generation of multifunctional nanomaterials to the control of bacterial infection, especially for gram-negative bacteria.
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21
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Zilony-Hanin N, Rosenberg M, Richman M, Yehuda R, Schori H, Motiei M, Rahimipour S, Groisman A, Segal E, Shefi O. Neuroprotective Effect of Nerve Growth Factor Loaded in Porous Silicon Nanostructures in an Alzheimer's Disease Model and Potential Delivery to the Brain. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1904203. [PMID: 31482695 DOI: 10.1002/smll.201904203] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 06/10/2023]
Abstract
Nerve growth factor (NGF) plays a vital role in reducing the loss of cholinergic neurons in Alzheimer's disease (AD). However, its delivery to the brain remains a challenge. Herein, NGF is loaded into degradable oxidized porous silicon (PSiO2 ) carriers, which are designed to carry and continuously release the protein over a 1 month period. The released NGF exhibits a substantial neuroprotective effect in differentiated rat pheochromocytoma PC12 cells against amyloid-beta (Aβ)-induced cytotoxicity, which is associated with Alzheimer's disease. Next, two potential localized administration routes of the porous carriers into murine brain are investigated: implantation of PSiO2 chips above the dura mater, and biolistic bombardment of PSiO2 microparticles through an opening in the skull using a pneumatic gene gun. The PSiO2 -implanted mice are monitored for a period of 8 weeks and no inflammation or adverse effects are observed. Subsequently, a successful biolistic delivery of these highly porous microparticles into a live-mouse brain is demonstrated for the first time. The bombarded microparticles are observed to penetrate the brain and reach a depth of 150 µm. These results pave the way for using degradable PSiO2 carriers as potential localized delivery systems for NGF to the brain.
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Affiliation(s)
- Neta Zilony-Hanin
- Faculty of Engineering, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- Bar-Ilan Institute of Nanotechnologies and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Michal Rosenberg
- Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Michal Richman
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Ronen Yehuda
- Department of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Hadas Schori
- Faculty of Engineering, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Menachem Motiei
- Faculty of Engineering, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- Bar-Ilan Institute of Nanotechnologies and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Alexander Groisman
- Department of Physics, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Ester Segal
- Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
- Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Orit Shefi
- Faculty of Engineering, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- Bar-Ilan Institute of Nanotechnologies and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
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