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Tsekrekou M, Giannakou M, Papanikolopoulou K, Skretas G. Protein aggregation and therapeutic strategies in SOD1- and TDP-43- linked ALS. Front Mol Biosci 2024; 11:1383453. [PMID: 38855322 PMCID: PMC11157337 DOI: 10.3389/fmolb.2024.1383453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/02/2024] [Indexed: 06/11/2024] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with severe socio-economic impact. A hallmark of ALS pathology is the presence of aberrant cytoplasmic inclusions composed of misfolded and aggregated proteins, including both wild-type and mutant forms. This review highlights the critical role of misfolded protein species in ALS pathogenesis, particularly focusing on Cu/Zn superoxide dismutase (SOD1) and TAR DNA-binding protein 43 (TDP-43), and emphasizes the urgent need for innovative therapeutic strategies targeting these misfolded proteins directly. Despite significant advancements in understanding ALS mechanisms, the disease remains incurable, with current treatments offering limited clinical benefits. Through a comprehensive analysis, the review focuses on the direct modulation of the misfolded proteins and presents recent discoveries in small molecules and peptides that inhibit SOD1 and TDP-43 aggregation, underscoring their potential as effective treatments to modify disease progression and improve clinical outcomes.
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Affiliation(s)
- Maria Tsekrekou
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Maria Giannakou
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Katerina Papanikolopoulou
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Centre “Alexander Fleming”, Vari, Greece
- ResQ Biotech, Patras Science Park, Rio, Greece
| | - Georgios Skretas
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- ResQ Biotech, Patras Science Park, Rio, Greece
- Institute for Bio-innovation, Biomedical Sciences Research Centre “Alexander Fleming”, Vari, Greece
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2
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Maity D. Recent advances in the modulation of amyloid protein aggregation using the supramolecular host-guest approaches. Biophys Chem 2023; 297:107022. [PMID: 37058879 DOI: 10.1016/j.bpc.2023.107022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 04/06/2023] [Accepted: 04/06/2023] [Indexed: 04/16/2023]
Abstract
Misfolding of proteins is associated with many incurable diseases in human beings. Understanding the process of aggregation from monomers to fibrils, the characterization of all intermediate species, and the origin of toxicity is very challenging. Extensive research including computational and experimental shed some light on these tricky phenomena. Non-covalent interactions between amyloidogenic domains of proteins play a major role in their self-assembly which can be disrupted by designed chemical tools. This will lead to the development of inhibitors of detrimental amyloid formations. In supramolecular host-guest chemistry approaches, different macrocycles function as hosts for encapsulating hydrophobic guests, i.e. phenylalanine residues of proteins, in their hydrophobic cavities via non-covalent interactions. In this way, they can disrupt the interactions between adjacent amyloidogenic proteins and prevent their self-aggregation. This supramolecular approach has also emerged as a prospective tool to modify the aggregation of several amyloidogenic proteins. In this review, we discussed recent supramolecular host-guest chemistry-based strategies for the inhibition of amyloid protein aggregation.
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Affiliation(s)
- Debabrata Maity
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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3
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Shahpasand-Kroner H, Siddique I, Malik R, Linares GR, Ivanova MI, Ichida J, Weil T, Münch J, Sanchez-Garcia E, Klärner FG, Schrader T, Bitan G. Molecular Tweezers: Supramolecular Hosts with Broad-Spectrum Biological Applications. Pharmacol Rev 2023; 75:263-308. [PMID: 36549866 PMCID: PMC9976797 DOI: 10.1124/pharmrev.122.000654] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 12/24/2022] Open
Abstract
Lysine-selective molecular tweezers (MTs) are supramolecular host molecules displaying a remarkably broad spectrum of biologic activities. MTs act as inhibitors of the self-assembly and toxicity of amyloidogenic proteins using a unique mechanism. They destroy viral membranes and inhibit infection by enveloped viruses, such as HIV-1 and SARS-CoV-2, by mechanisms unrelated to their action on protein self-assembly. They also disrupt biofilm of Gram-positive bacteria. The efficacy and safety of MTs have been demonstrated in vitro, in cell culture, and in vivo, suggesting that these versatile compounds are attractive therapeutic candidates for various diseases, infections, and injuries. A lead compound called CLR01 has been shown to inhibit the aggregation of various amyloidogenic proteins, facilitate their clearance in vivo, prevent infection by multiple viruses, display potent anti-biofilm activity, and have a high safety margin in animal models. The inhibitory effect of CLR01 against amyloidogenic proteins is highly specific to abnormal self-assembly of amyloidogenic proteins with no disruption of normal mammalian biologic processes at the doses needed for inhibition. Therapeutic effects of CLR01 have been demonstrated in animal models of proteinopathies, lysosomal-storage diseases, and spinal-cord injury. Here we review the activity and mechanisms of action of these intriguing compounds and discuss future research directions. SIGNIFICANCE STATEMENT: Molecular tweezers are supramolecular host molecules with broad biological applications, including inhibition of abnormal protein aggregation, facilitation of lysosomal clearance of toxic aggregates, disruption of viral membranes, and interference of biofilm formation by Gram-positive bacteria. This review discusses the molecular and cellular mechanisms of action of the molecular tweezers, including the discovery of distinct mechanisms acting in vitro and in vivo, and the application of these compounds in multiple preclinical disease models.
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Affiliation(s)
- Hedieh Shahpasand-Kroner
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Ibrar Siddique
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Ravinder Malik
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Gabriel R Linares
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Magdalena I Ivanova
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Justin Ichida
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Tatjana Weil
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Jan Münch
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Elsa Sanchez-Garcia
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Frank-Gerrit Klärner
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Thomas Schrader
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine (H.S.-K., I.S., R.M., G.B.), Brain Research Institute (G.B.), and Molecular Biology Institute (G.B.), University of California, Los Angeles, California; Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (G.R.L., J.I.); Department of Neurology, University of Michigan, Ann Arbor, Michigan (M.I.I.); Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany (T.W., J.M.); and Department of Computational Biochemistry (E.S.-G.) and Faculty of Chemistry (F-G.K., T.S.), University of Duisburg-Essen, Essen, Germany
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4
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Dimitrova YN, Gutierrez JA, Huard K. It's ok to be outnumbered - sub-stoichiometric modulation of homomeric protein complexes. RSC Med Chem 2023; 14:22-46. [PMID: 36760737 PMCID: PMC9890894 DOI: 10.1039/d2md00212d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Abstract
An arsenal of molecular tools with increasingly diversified mechanisms of action is being developed by the scientific community to enable biological interrogation and pharmaceutical modulation of targets and pathways of ever increasing complexity. While most small molecules interact with the target of interest in a 1 : 1 relationship, a noteworthy number of recent examples were reported to bind in a sub-stoichiometric manner to a homomeric protein complex. This approach requires molecular understanding of the physiologically relevant protein assemblies and in-depth characterization of the compound's mechanism of action. The recent literature examples summarized here were selected to illustrate methods used to identify and characterize molecules with such mechanisms. The concept of one small molecule targeting a homomeric protein assembly is not new but the subject deserves renewed inspection in light of emerging technologies and increasingly diverse target biology, to ensure relevant in vitro systems are used and valuable compounds with potentially novel sub-stoichiometric mechanisms of action aren't overlooked.
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Affiliation(s)
| | | | - Kim Huard
- Genentech 1 DNA Way South San Francisco CA 94080 USA
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5
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Samanta N, Ruiz‐Blanco YB, Fetahaj Z, Gnutt D, Lantz C, Loo JA, Sanchez‐Garcia E, Ebbinghaus S. Superoxide Dismutase 1 Folding Stability as a Target for Molecular Tweezers in SOD1-Related Amyotrophic Lateral Sclerosis. Chembiochem 2022; 23:e202200396. [PMID: 36083789 PMCID: PMC9828543 DOI: 10.1002/cbic.202200396] [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: 07/13/2022] [Revised: 09/09/2022] [Indexed: 01/12/2023]
Abstract
Protein misfolding and aggregation are hallmarks of many severe neurodegenerative diseases including Alzheimer's, Parkinson's and Huntington's disease. As a supramolecular ligand that binds to lysine and arginine residues, the molecular tweezer CLR01 was found to modify the aggregation pathway of disease-relevant proteins in vitro and in vivo with beneficial effects on toxicity. However, the molecular mechanisms of how tweezers exert these effects remain mainly unknown, hampering further drug development. Here, we investigate the modulation mechanism of unfolding and aggregation pathways of SOD1, which are involved in amyotrophic lateral sclerosis (ALS), by CLR01. Using a truncated version of the wildtype SOD1 protein, SOD1bar , we show that CLR01 acts on the first step of the aggregation pathway, the unfolding of the SOD1 monomer. CLR01 increases, by ∼10 °C, the melting temperatures of the A4V and G41D SOD1 mutants, which are commonly observed mutations in familial ALS. Molecular dynamics simulations and binding free energy calculations as well as native mass spectrometry and mutational studies allowed us to identify K61 and K92 as binding sites for the tweezers to mediate the stability increase. The data suggest that the modulation of SOD1 conformational stability is a promising target for future developments of supramolecular ligands against neurodegenerative diseases.
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Affiliation(s)
- Nirnay Samanta
- Institute of Physical and Theoretical ChemistryTU Braunschweig38106BraunschweigGermany,Braunschweig Integrated Centre of Systems Biology (BRICS) 38106BraunschweigGermany
| | - Yasser B. Ruiz‐Blanco
- Computational Biochemistry, Center of Medical BiotechnologyUniversity of Duisburg-Essen45141EssenGermany
| | - Zamira Fetahaj
- Department of Physical Chemistry IIRuhr University44780BochumGermany
| | - David Gnutt
- Institute of Physical and Theoretical ChemistryTU Braunschweig38106BraunschweigGermany,Braunschweig Integrated Centre of Systems Biology (BRICS) 38106BraunschweigGermany,Department of Physical Chemistry IIRuhr University44780BochumGermany
| | - Carter Lantz
- Department of Chemistry and BiochemistryUniversity of California-Los Angeles90095Los Angeles, CAUSA
| | - Joseph A. Loo
- Department of Chemistry and BiochemistryUniversity of California-Los Angeles90095Los Angeles, CAUSA
| | - Elsa Sanchez‐Garcia
- Computational Biochemistry, Center of Medical BiotechnologyUniversity of Duisburg-Essen45141EssenGermany
| | - Simon Ebbinghaus
- Institute of Physical and Theoretical ChemistryTU Braunschweig38106BraunschweigGermany,Braunschweig Integrated Centre of Systems Biology (BRICS) 38106BraunschweigGermany,Department of Physical Chemistry IIRuhr University44780BochumGermany
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6
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Wang X, Chen Y, Shi H, Zou P. Erythromycin Estolate Is a Potent Inhibitor Against HCoV-OC43 by Directly Inactivating the Virus Particle. Front Cell Infect Microbiol 2022; 12:905248. [PMID: 35873167 PMCID: PMC9301004 DOI: 10.3389/fcimb.2022.905248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 06/10/2022] [Indexed: 12/22/2022] Open
Abstract
In addition to antibacterial effects, macrolide antibiotics exhibit other extensive pharmacological effects, such as anti-inflammatory and antiviral activities. Erythromycin estolate, one of the macrolide antibiotics, was previously investigated to effectively inhibit infections of various flaviviruses including Zika virus, dengue virus, and yellow fever virus, but its antiviral effect against human coronavirus remains unknown. Thus, the current study was designed to evaluate the antiviral efficacy of erythromycin estolate against human coronavirus strain OC43 (HCoV-OC43) and to illustrate the underlying mechanisms. Erythromycin estolate effectively inhibited HCoV-OC43 infection in different cell types and significantly reduced virus titers at safe concentration without cell cytotoxicity. Furthermore, erythromycin estolate was identified to inhibit HCoV-OC43 infection at the early stage and to irreversibly inactivate virus by disrupting the integrity of the viral membrane whose lipid component might be the target of action. Together, it was demonstrated that erythromycin estolate could be a potential therapeutic drug for HCoV-OC43 infection.
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Affiliation(s)
- Xiaohuan Wang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yongkang Chen
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Huichun Shi
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Peng Zou
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- *Correspondence: Peng Zou,
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7
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Maity D, Oh Y, Gremer L, Hoyer W, Magzoub M, Hamilton AD. Cucurbit[7]uril Inhibits Islet Amyloid Polypeptide Aggregation by Targeting N Terminus Hot Segments and Attenuates Cytotoxicity. Chemistry 2022; 28:e202200456. [DOI: 10.1002/chem.202200456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Debabrata Maity
- Department of Chemistry New York University New York NY 10003 USA
- Present Address: Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
| | - Yujeong Oh
- Biology Program New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Lothar Gremer
- Institut für Physikalische Biologie Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry) and JuStruct: Jülich Center for Structural Biology Forschungszentrum Jülich 52425 Jülich Germany
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry) and JuStruct: Jülich Center for Structural Biology Forschungszentrum Jülich 52425 Jülich Germany
| | - Mazin Magzoub
- Biology Program New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
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8
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Le MH, Taghuo-Kaptouom E, Schrader T. Molecular Tweezers – a new class of potent broad-spectrum antivirals against enveloped viruses. Chem Commun (Camb) 2022; 58:2954-2966. [DOI: 10.1039/d1cc06737k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new supramolecular approach to broad spectrum antivirals utilizes host guest chemistry between molecular tweezers and lysine/arginine as well as choline. Basic amino acids in amyloid-forming SEVI peptides (semen-derived enhancers...
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9
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Li Z, Siddique I, Hadrović I, Kirupakaran A, Li J, Zhang Y, Klärner FG, Schrader T, Bitan G. Lysine-selective molecular tweezers are cell penetrant and concentrate in lysosomes. Commun Biol 2021; 4:1076. [PMID: 34521989 PMCID: PMC8440717 DOI: 10.1038/s42003-021-02603-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 08/24/2021] [Indexed: 11/09/2022] Open
Abstract
Lysine-selective molecular tweezers are promising drug candidates against proteinopathies, viral infection, and bacterial biofilm. Despite demonstration of their efficacy in multiple cellular and animal models, important questions regarding their mechanism of action, including cell penetrance and intracellular distribution, have not been answered to date. The main impediment to answering these questions has been the low intrinsic fluorescence of the main compound tested to date, called CLR01. Here, we address these questions using new fluorescently labeled molecular tweezers derivatives. We show that these compounds are internalized in neurons and astrocytes, at least partially through dynamin-dependent endocytosis. In addition, we demonstrate that the molecular tweezers concentrate rapidly in acidic compartments, primarily lysosomes. Accumulation of molecular tweezers in lysosomes may occur both through the endosomal-lysosomal pathway and via the autophagy-lysosome pathway. Moreover, by visualizing colocalization of molecular tweezers, lysosomes, and tau aggregates we show that lysosomes likely are the main site for the intracellular anti-amyloid activity of molecular tweezers. These findings have important implications for the mechanism of action of molecular tweezers in vivo, explaining how administration of low doses of the compounds achieves high effective concentrations where they are needed, and supporting the development of these compounds as drugs for currently cureless proteinopathies.
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Affiliation(s)
- Zizheng Li
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Ibrar Siddique
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Inesa Hadrović
- Institute of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Abbna Kirupakaran
- Institute of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Jiwen Li
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Ye Zhang
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA.,Brain Research Institute, University of California, Los Angeles, Los Angeles, CA, USA.,Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
| | | | - Thomas Schrader
- Institute of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA. .,Brain Research Institute, University of California, Los Angeles, Los Angeles, CA, USA. .,Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA.
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10
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Xu J, Zheng T, Huang X, Wang Y, Yin G, Du W. Procyanidine resists the fibril formation of human islet amyloid polypeptide. Int J Biol Macromol 2021; 183:1067-1078. [PMID: 33965498 DOI: 10.1016/j.ijbiomac.2021.05.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/19/2021] [Accepted: 05/03/2021] [Indexed: 12/12/2022]
Abstract
Human islet amyloid polypeptide (hIAPP) is widely studied due to its close correlation with the pathogenic mechanism of type II diabetes mellitus (T2DM). Bioflavonoids have been used in the neurodegeneration and diabetes studies. However, the structure-activity relationship remains unclear in many of these compounds. In this work, we performed diverse biophysical and biochemical methods to explore the inhibition of procyanidine on hIAPP and compared with that on amyloid-β (Aβ) protein which is linked to Alzheimer's disease (AD). The procyanidine effectively inhibited the aggregation of hIAPP and Aβ through hydrophobic and hydrogen bonding interactions, it dissolved the aged fibrils into nanoscale particles. The compound also ameliorated the cytotoxicity and the membrane leakage by reducing the peptide oligomerization. The procyanidine showed better binding affinity and inhibitory effects on peptide aggregation and upregulated the cell viability to hIAPP than to Aβ, which could be a prospective inhibitor against hIAPP. This work also offered a possible strategy for T2DM and AD treatments.
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Affiliation(s)
- Jufei Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Ting Zheng
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiangyi Huang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Yanan Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Guowei Yin
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China.
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
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11
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Di J, Siddique I, Li Z, Malki G, Hornung S, Dutta S, Hurst I, Ishaaya E, Wang A, Tu S, Boghos A, Ericsson I, Klärner FG, Schrader T, Bitan G. The molecular tweezer CLR01 improves behavioral deficits and reduces tau pathology in P301S-tau transgenic mice. ALZHEIMERS RESEARCH & THERAPY 2021; 13:6. [PMID: 33397489 PMCID: PMC7784007 DOI: 10.1186/s13195-020-00743-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/07/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Molecular tweezers (MTs) are broad-spectrum inhibitors of abnormal protein aggregation. A lead MT, called CLR01, has been demonstrated to inhibit the aggregation and toxicity of multiple amyloidogenic proteins in vitro and in vivo. Previously, we evaluated the effect of CLR01 in the 3 × Tg mouse model of Alzheimer's disease, which overexpresses mutant human presenilin 1, amyloid β-protein precursor, and tau and found that subcutaneous administration of the compound for 1 month led to a robust reduction of amyloid plaques, neurofibrillary tangles, and microgliosis. CLR01 also has been demonstrated to inhibit tau aggregation in vitro and tau seeding in cell culture, yet because in Alzheimer's disease (AD) and in the 3 × Tg model, tau hyperphosphorylation and aggregation are thought to be downstream of Aβ insults, the study in this model left open the question whether CLR01 affected tau in vivo directly or indirectly. METHODS To determine if CLR01 could ameliorate tau pathology directly in vivo, we tested the compound similarly using the P301S-tau (line PS19) mouse model. Mice were administered 0.3 or 1.0 mg/kg per day CLR01 and tested for muscle strength and behavioral deficits, including anxiety- and disinhibition-like behavior. Their brains then were analyzed by immunohistochemical and biochemical assays for pathological forms of tau, neurodegeneration, and glial pathology. RESULTS CLR01 treatment ameliorated muscle-strength deterioration, anxiety-, and disinhibition-like behavior. Improved phenotype was associated with decreased levels of pathologic tau forms, suggesting that CLR01 exerts a direct effect on tau in vivo. Limitations of the study included a relatively short treatment period of the mice at an age in which full pathology is not yet developed. In addition, high variability in this model lowered the statistical significance of the findings of some outcome measures. CONCLUSIONS The findings suggest that CLR01 is a particularly attractive candidate for the treatment of AD because it targets simultaneously the two major pathogenic proteins instigating and propagating the disease, amyloid β-protein (Aβ), and tau, respectively. In addition, our study suggests that CLR01 can be used for the treatment of other tauopathies in the absence of amyloid pathology.
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Affiliation(s)
- Jing Di
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ibrar Siddique
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Zizheng Li
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ghattas Malki
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Simon Hornung
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA.,Present Address: Division of Peptide Biochemistry, Technical University of Munich, Freising, Germany
| | - Suman Dutta
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ian Hurst
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ella Ishaaya
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Austin Wang
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Sally Tu
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ani Boghos
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | - Ida Ericsson
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA
| | | | - Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, University of California, Gordon Neuroscience Research Building, Room 451, 635 Charles E. Young Drive South, Los Angeles, CA, 90095-7334, USA. .,Brain Research Institute, University of California, Los Angeles, CA, USA. .,Molecular Biology Institute, University of California, Los Angeles, CA, USA.
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12
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Xu J, Zheng T, Zhao C, Huang X, Du W. Resistance of nepetin and its analogs on the fibril formation of human islet amyloid polypeptide. Int J Biol Macromol 2020; 166:435-447. [PMID: 33127549 DOI: 10.1016/j.ijbiomac.2020.10.202] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/10/2020] [Accepted: 10/24/2020] [Indexed: 12/17/2022]
Abstract
The self-aggregation of human islet amyloid polypeptide (hIAPP) into toxic oligomers and fibrils is closely linked to the pathogenesis of type II diabetes mellitus. Inhibitors can resist hIAPP misfolding, and the resistance can be considered an alternative therapeutic strategy for this disease. Flavones have been applied in the field of diabetes research, however, the inhibition mechanism of many compounds on the fibril formation of related pathogenic peptides remains unclear. In this work, four flavones, namely, nepetin (1), genkwanin (2), luteolin (3), and apigenin (4), were used to impede the peptide aggregation of hIAPP and compared with that on Aβ protein, which is correlated with Alzheimer's disease. Results indicated that the four flavones effectively inhibited the aggregation of the two peptides and mostly dispersed the mature fibrils to monomers. The interactions of flavones with the two peptides demonstrated a spontaneous and exothermic reaction through predominant hydrophobic and hydrogen bonding interactions. The binding affinities of 1 and 3 were stronger than those of 2 and 4 possibly because of the difference in the substituent groups of these molecules. These flavones could also decrease membrane leakage and upregulate cell viability by reducing the formation of toxic oligomers. Moreover, the performance of these flavones in terms of binding affinity, cellular viability, and decreased oligomerization was better on hIAPP than on Aβ. This work offered valuable data about these flavones as prospective therapeutic agents against relevant diseases.
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Affiliation(s)
- Jufei Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Ting Zheng
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Cong Zhao
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiangyi Huang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
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13
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Bayer P, Matena A, Beuck C. NMR Spectroscopy of supramolecular chemistry on protein surfaces. Beilstein J Org Chem 2020; 16:2505-2522. [PMID: 33093929 PMCID: PMC7554676 DOI: 10.3762/bjoc.16.203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/18/2020] [Indexed: 01/17/2023] Open
Abstract
As one of the few analytical methods that offer atomic resolution, NMR spectroscopy is a valuable tool to study the interaction of proteins with their interaction partners, both biomolecules and synthetic ligands. In recent years, the focus in chemistry has kept expanding from targeting small binding pockets in proteins to recognizing patches on protein surfaces, mostly via supramolecular chemistry, with the goal to modulate protein–protein interactions. Here we present NMR methods that have been applied to characterize these molecular interactions and discuss the challenges of this endeavor.
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Affiliation(s)
- Peter Bayer
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Universitätsstr. 1-5, 45141 Essen, Germany
| | - Anja Matena
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Universitätsstr. 1-5, 45141 Essen, Germany
| | - Christine Beuck
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Universitätsstr. 1-5, 45141 Essen, Germany
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14
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Maity D, Kumar S, AlHussein R, Gremer L, Howarth M, Karpauskaite L, Hoyer W, Magzoub M, Hamilton AD. Sub-stoichiometric inhibition of IAPP aggregation: a peptidomimetic approach to anti-amyloid agents. RSC Chem Biol 2020; 1:225-232. [PMID: 34458762 PMCID: PMC8341728 DOI: 10.1039/d0cb00086h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/03/2020] [Indexed: 11/21/2022] Open
Abstract
Membrane-catalysed misfolding of islet amyloid polypeptide is associated with the death of β-cells in type II diabetes (T2D). Most active compounds so far reported require high doses for inhibition of membrane bound IAPP fibrillation. Here, we describe a naphthalimide-appended oligopyridylamide-based α-helical mimetic, DM 1, for targeting membrane bound IAPP. DM 1 completely inhibits the aggregation of IAPP at doses of 0.2 equivalents. DM 1 is also effective at similarly low doses for inhibition of seed-catalyzed secondary nucleation. An NMR based study demonstrates that DM 1 modulates IAPP self-assembly by stabilizing and/or perturbing the N-terminus helix conformation. DM 1 at substoichiometric doses rescues rat insulinoma cells from IAPP-mediated cytotoxicity. Most importantly, 0.2 equivalents of DM 1 disaggregate preformed oligomers and fibrils and can reverse cytotoxicity by modulating toxic preformed oligomers and fibrils of IAPP into non-toxic conformations.
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Affiliation(s)
- Debabrata Maity
- Department of Chemistry, New York University New York New York 10003 USA
| | - Sunil Kumar
- Department of Chemistry, New York University New York New York 10003 USA
| | - Ruyof AlHussein
- Department of Chemistry, New York University New York New York 10003 USA
| | - Lothar Gremer
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany.,Institute of Complex Systems, Structural Biochemistry (ICS-6) Forschungszentrum Jülich 52425 Jülich Germany
| | - Madeline Howarth
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Laura Karpauskaite
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany.,Institute of Complex Systems, Structural Biochemistry (ICS-6) Forschungszentrum Jülich 52425 Jülich Germany
| | - Mazin Magzoub
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Andrew D Hamilton
- Department of Chemistry, New York University New York New York 10003 USA
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15
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Zhao H, Yang XH, Pan YC, Tian HW, Hu XY, Guo DS. Inhibition of insulin fibrillation by amphiphilic sulfonatocalixarene. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.01.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Ruiz-Blanco YB, Sanchez-Garcia E. CL-FEP: An End-State Free Energy Perturbation Approach. J Chem Theory Comput 2020; 16:1396-1410. [DOI: 10.1021/acs.jctc.9b00725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yasser B. Ruiz-Blanco
- Computational Biochemistry, Center of Medical Biotechnology, University of Duisburg-Essen, Essen 45141, Germany
| | - Elsa Sanchez-Garcia
- Computational Biochemistry, Center of Medical Biotechnology, University of Duisburg-Essen, Essen 45141, Germany
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17
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Kumar AP, Lee S, Lukman S. Computational and Experimental Approaches to Design Inhibitors of Amylin Aggregation. Curr Drug Targets 2019; 20:1680-1694. [DOI: 10.2174/1389450120666190719164316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 01/21/2023]
Abstract
Amylin is a neuroendocrine peptide hormone secreted by pancreatic ß-cells; however,
amylin is toxic to ß-cells when it is aggregated in type 2 diabetes mellitus (T2DM). It is important to
understand amylin’s structures and aggregation mechanism for the discovery and design of effective
drugs to inhibit amylin aggregation. In this review, we investigated experimental and computational
studies on amylin structures and inhibitors. Our review provides some novel insights into amylin, particularly
for the design of its aggregation inhibitors to treat T2DM. We detailed the potential inhibitors
that have been studied hitherto and highlighted the neglected need to consider different amylin attributes
that depend on the presence/absence of physiologically relevant conditions, such as membranes.
These conditions and the experimental methods can greatly influence the results of studies on amylininhibitor
complexes. Text-mining over 3,000 amylin-related PubMed abstracts suggests the combined
therapeutic potential of amylin with leptin and glucagon-like peptide-1, which are two key hormones
in obesity. The results also suggest that targeting amylin aggregation can contribute to therapeutic efforts
for Alzheimer’s disease (AD). Therefore, we have also reviewed the role of amylin in other conditions
including obesity and AD. Finally, we provided insights for designing inhibitors of different
types (small molecules, proteins, peptides/mimetics, metal ions) to inhibit amylin aggregation.
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Affiliation(s)
- Ammu Prasanna Kumar
- Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Sungmun Lee
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, College of Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Suryani Lukman
- Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
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18
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Despres C, Di J, Cantrelle FX, Li Z, Huvent I, Chambraud B, Zhao J, Chen J, Chen S, Lippens G, Zhang F, Linhardt R, Wang C, Klärner FG, Schrader T, Landrieu I, Bitan G, Smet-Nocca C. Major Differences between the Self-Assembly and Seeding Behavior of Heparin-Induced and in Vitro Phosphorylated Tau and Their Modulation by Potential Inhibitors. ACS Chem Biol 2019; 14:1363-1379. [PMID: 31046227 PMCID: PMC6636790 DOI: 10.1021/acschembio.9b00325] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Self-assembly of
the microtubule-associated protein tau into neurotoxic
oligomers, fibrils, and paired helical filaments, and cell-to-cell
spreading of these pathological tau species are critical processes
underlying the pathogenesis of Alzheimer’s disease and other
tauopathies. Modulating the self-assembly process and inhibiting formation
and spreading of such toxic species are promising strategies for therapy
development. A challenge in investigating tau self-assembly in vitro
is that, unlike most amyloidogenic proteins, tau does not aggregate
in the absence of posttranslational modifications (PTM), aggregation
inducers, or preformed seeds. The most common induction method is
addition of polyanions, such as heparin; yet, this artificial system
may not represent adequately tau self-assembly in vivo, which is driven
by aberrant phosphorylation and other PTMs, potentially leading to
in vitro data that do not reflect the behavior of tau and its interaction
with modulators in vivo. To tackle these challenges, methods for in
vitro phosphorylation of tau to produce aggregation-competent forms
recently have been introduced (Despres
et al. (2017) Proc. Natl. Acad. Sci. U.S.A., 114, 9080−908528784767). However, the oligomerization, seeding, and interaction
with assembly modulators of the different forms of tau have not been
studied to date. To address these knowledge gaps, we compared here
side-by-side the self-assembly and seeding activity of heparin-induced
tau with two forms of in vitro phosphorylated tau and tested how the
molecular tweezer CLR01, a negatively charged compound, affected these
processes. Tau was phosphorylated by incubation either with activated
extracellular signal-regulated kinase 2 or with a whole rat brain
extract. Seeding activity was measured using a fluorescence-resonance
energy transfer-based biosensor-cell method. We also used solution-state
NMR to investigate the binding sites of CLR01 on tau and how they
were impacted by phosphorylation. Our systematic structure–activity
relationship study demonstrates that heparin-induced tau behaves differently
from in vitro phosphorylated tau. The aggregation rates of the different
forms are distinct as is the intracellular localization of the induced
aggregates, which resemble brain-derived tau strains suggesting that
heparin-induced tau and in vitro phosphorylated tau have different
conformations, properties, and activities. CLR01 inhibits aggregation
and seeding of both heparin-induced and in vitro phosphorylated tau
dose-dependently, although heparin induction interferes with the interaction
between CLR01 and tau.
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Affiliation(s)
| | | | | | | | | | | | | | - Jianle Chen
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou, Zhejiang 310029, China
| | - Shiguo Chen
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou, Zhejiang 310029, China
| | - Guy Lippens
- Lille University CNRS UMR 8576, UGSF, F-59000 Lille, France
| | | | - Robert Linhardt
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou, Zhejiang 310029, China
| | | | - Frank-Gerrit Klärner
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | - Thomas Schrader
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
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19
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Hsu YH, Chen YW, Wu MH, Tu LH. Protein Glycation by Glyoxal Promotes Amyloid Formation by Islet Amyloid Polypeptide. Biophys J 2019; 116:2304-2313. [PMID: 31155148 DOI: 10.1016/j.bpj.2019.05.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 04/16/2019] [Accepted: 05/14/2019] [Indexed: 01/01/2023] Open
Abstract
Protein glycation, also known as nonenzymatic glycosylation, is a spontaneous post-translational modification that would change the structure and stability of proteins or hormone peptides. Recent studies have indicated that glycation plays a role in type 2 diabetes (T2D) and neurodegenerative diseases. Over the last two decades, many types of advanced glycation end products (AGEs), formed through the reactions of an amino group of proteins with reducing sugars, have been identified and detected in vivo. However, the effect of glycation on protein aggregation has not been fully investigated. In this study, we aim to elucidate the impact of protein glycation on islet amyloid polypeptide (IAPP, also known as amylin) aggregation, which was strongly associated with T2D. We chemically synthesized glycated IAPP (AGE-IAPP) to mimic the consequence of this hormone peptide in a hyperglycemia (high blood sugar) environment. Our data revealed that AGE-IAPP formed amyloid faster than normal IAPP, and higher-molecular-weight AGE-IAPP oligomers were also observed in the early stage of aggregation. Circular dichroism spectra also indicated that AGE-IAPP exhibited faster conformational changes from random coil to its β-sheet fibrillar states. Moreover, AGE-IAPP can induce normal IAPP to expedite its aggregation process, and its fibrils can also act as templates to promote IAPP aggregation. AGE-IAPP, like normal IAPP, is capable of interacting with synthetic membranes and also exhibits cytotoxicity. Our studies demonstrated that glycation modification of IAPP promotes the amyloidogenic properties of IAPP, and it may play a role in accumulating additional amyloid during T2D progression.
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Affiliation(s)
- Yi-Hsuan Hsu
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Yun-Wen Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Meng-Hsin Wu
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Ling-Hsien Tu
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan.
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20
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Mbarek A, Moussa G, Chain JL. Pharmaceutical Applications of Molecular Tweezers, Clefts and Clips. Molecules 2019; 24:molecules24091803. [PMID: 31075983 PMCID: PMC6539068 DOI: 10.3390/molecules24091803] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/03/2019] [Accepted: 05/07/2019] [Indexed: 12/25/2022] Open
Abstract
Synthetic acyclic receptors, composed of two arms connected with a spacer enabling molecular recognition, have been intensively explored in host-guest chemistry in the past decades. They fall into the categories of molecular tweezers, clefts and clips, depending on the geometry allowing the recognition of various guests. The advances in synthesis and mechanistic studies have pushed them forward to pharmaceutical applications, such as neurodegenerative disorders, infectious diseases, cancer, cardiovascular disease, diabetes, etc. In this review, we provide a summary of the synthetic molecular tweezers, clefts and clips that have been reported for pharmaceutical applications. Their structures, mechanism of action as well as in vitro and in vivo results are described. Such receptors were found to selectively bind biological guests, namely, nucleic acids, sugars, amino acids and proteins enabling their use as biosensors or therapeutics. Particularly interesting are dynamic molecular tweezers which are capable of controlled motion in response to an external stimulus. They proved their utility as imaging agents or in the design of controlled release systems. Despite some issues, such as stability, cytotoxicity or biocompatibility that still need to be addressed, it is obvious that molecular tweezers, clefts and clips are promising candidates for several incurable diseases as therapeutic agents, diagnostic or delivery tools.
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Affiliation(s)
- Amira Mbarek
- Gene Delivery Laboratory, Faculty of pharmacy, Université de Montréal, H3C 3J7, Montréal, Québec, Canada.
| | - Ghina Moussa
- Gene Delivery Laboratory, Faculty of pharmacy, Université de Montréal, H3C 3J7, Montréal, Québec, Canada.
| | - Jeanne Leblond Chain
- Gene Delivery Laboratory, Faculty of pharmacy, Université de Montréal, H3C 3J7, Montréal, Québec, Canada.
- Univ. Bordeaux, ARNA Laboratory, F-33016 Bordeaux, France.
- INSERM U1212, CNRS UMR 5320, ARNA Laboratory, F-33016 Bordeaux, France.
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21
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ADS-J1 disaggregates semen-derived amyloid fibrils. Biochem J 2019; 476:1021-1035. [PMID: 30877194 DOI: 10.1042/bcj20180886] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/05/2019] [Accepted: 03/14/2019] [Indexed: 11/17/2022]
Abstract
Semen-derived amyloid fibrils, comprising SEVI (semen-derived enhancer of viral infection) fibrils and SEM1 fibrils, could remarkably enhance HIV-1 sexual transmission and thus are potential targets for the development of an effective microbicide. Previously, we found that ADS-J1, apart from being an HIV-1 entry inhibitor, could also potently inhibit seminal amyloid fibrillization and block fibril-mediated enhancement of viral infection. However, the remodeling effects of ADS-J1 on mature seminal fibrils were unexplored. Herein, we investigated the capacity of ADS-J1 to disassemble seminal fibrils and the potential mode of action by applying several biophysical and biochemical measurements, combined with molecular dynamic (MD) simulations. We found that ADS-J1 effectively remodeled SEVI, SEM186-107 fibrils and endogenous seminal fibrils. Unlike epigallocatechin gallate (EGCG), a universal amyloid fibril breaker, ADS-J1 disaggregated SEVI fibrils into monomeric peptides, which was independent of oxidation reaction. MD simulations revealed that ADS-J1 displayed strong binding potency to the full-length PAP248-286 via electrostatic interactions, hydrophobic interactions and hydrogen bonds. ADS-J1 might initially bind to the fibrillar surface and then occupy the amyloid core, which eventually lead to fibril disassembly. Furthermore, the binding of ADS-J1 with PAP248-286 might induce conformational changes of PAP248-286 Disassembled PAP248-286 might not be favorable to re-aggregate into fibrils. ADS-J1 also exerts abilities to remodel a panel of amyloid fibrils, including Aβ1-42, hIAPP1-37 and EP2 fibrils. ADS-J1 displays promising potential to be a combination microbicide and an effective lead-product to treat amyloidogenic diseases.
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22
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Synthesis and identification of novel pyridazinylpyrazolone based diazo compounds as inhibitors of human islet amyloid polypeptide aggregation. Bioorg Chem 2019; 84:339-346. [DOI: 10.1016/j.bioorg.2018.11.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 11/17/2018] [Accepted: 11/24/2018] [Indexed: 02/06/2023]
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23
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Shi Y, Lv W, Jiao A, Zhang C, Zhang J. A Novel Pentapeptide Inhibitor Reduces Amyloid Deposit Formation by Direct Interaction with hIAPP. Int J Endocrinol 2019; 2019:9062032. [PMID: 30838043 PMCID: PMC6374824 DOI: 10.1155/2019/9062032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/14/2018] [Accepted: 11/26/2018] [Indexed: 11/17/2022] Open
Abstract
BACKGROUNDS The presence of amyloid deposits of human islet amyloid polypeptide (hIAPP) in islet β-cells has been associated with type 2 diabetes occurrence and islet graft failure. Self-assembly into oligomers and fibrils during the process of aggregation by hIAPP can lead to failure and depletion of β-cells. Studies have shown that some critical regions of hIAPP might contribute to the aggregation. Thus, many studies focused on finding the effective molecules, especially the short-peptide inhibitors, that bind to these regions and disrupt the aggregation of hIAPP. In the present study, a novel pentapeptide inhibitor Phe-Leu-Pro-Asn-Phe (FLPNF) was designed and its effectiveness on the inhibition of the formation of amyloid deposits was examined. METHODS The binding mode between FLPNF and hIAPP was performed using molecular docking. The effectiveness of FLPNF on inhibiting hIAPP amyloid aggregation was tested by Thioflavin T (ThT) staining. Furthermore, negative stain electron microscopy was used to observe hIAPP fibrils. A biolayer interferometry analysis was used to identify the interaction between FLPNF and hIAPP. In addition, the cytotoxicity toward INS-1 cells was tested by a cell proliferation assay. RESULTS FLPNF was predicted to have a compact conformation to bind at the site of hIAPP. FLPNF strongly inhibited the amyloid aggregation of hIAPP at a 10 : 1 molar ratio in vitro. Coincubation of FLPNF with hIAPP decreased the amount of hIAPP fibrils. Furthermore, a direct interaction between FLPNF and hIAPP was confirmed. FLPNF could also decrease the cytotoxic effect of hIAPP. CONCLUSIONS The novel pentapeptide inhibitor FLPNF was constructed and inhibited the aggregation through direct binding to hIAPP. It is considered a suitable inhibitor for hIAPP amyloid deposit formation.
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Affiliation(s)
- Yue Shi
- Hepatobiliary Surgery Department and Unit of Organ Transplantation, The First Hospital of China Medical University, Shenyang 110001, China
- Department of Geriatric Surgery, The First Hospital of China Medical University, Shenyang 110001, China
| | - Wu Lv
- Hepatobiliary Surgery Department and Unit of Organ Transplantation, The First Hospital of China Medical University, Shenyang 110001, China
- Department of General Surgery (VIP Ward), Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang 110001, China
| | - Ao Jiao
- Hepatobiliary Surgery Department and Unit of Organ Transplantation, The First Hospital of China Medical University, Shenyang 110001, China
| | - Chengshuo Zhang
- Hepatobiliary Surgery Department and Unit of Organ Transplantation, The First Hospital of China Medical University, Shenyang 110001, China
| | - Jialin Zhang
- Hepatobiliary Surgery Department and Unit of Organ Transplantation, The First Hospital of China Medical University, Shenyang 110001, China
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25
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Hisamatsu Y, Umezawa N, Yagi H, Kato K, Higuchi T. Design and synthesis of a 4-aminoquinoline-based molecular tweezer that recognizes protoporphyrin IX and iron(iii) protoporphyrin IX and its application as a supramolecular photosensitizer. Chem Sci 2018; 9:7455-7467. [PMID: 30319746 PMCID: PMC6180317 DOI: 10.1039/c8sc02133c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/14/2018] [Indexed: 01/08/2023] Open
Abstract
We report on the design and synthesis of a new type of 4-aminoquinoline-based molecular tweezer 1 which forms a stable host-guest complex with protoporphyrin IX (PPIX) via multiple interactions in a DMSO and HEPES buffer (pH 7.4) mixed solvent system. The binding constant for the 1 : 1 complex (K 11) between 1 and PPIX is determined to be 4 × 106 M-1. Furthermore, 1 also forms a more stable complex with iron(iii) protoporphyrin IX (Fe(iii)PPIX), the K 11 value for which is one order of magnitude greater than that for PPIX, indicating that 1 could be used as a recognition unit of a synthetic heme sensor. On the other hand, the formation of the stable PPIX·1 complex (supramolecular photosensitizer) prompted us to apply it to photodynamic therapy (PDT). Cell staining experiments using the supramolecular photosensitizer and evaluations of its photocytotoxicity indicate that the PDT activity of PPIX is improved as the result of the formation of a complex with 1.
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Affiliation(s)
- Yosuke Hisamatsu
- Graduate School of Pharmaceutical Sciences , Nagoya City University , 3-1 Tanabe-dori, Mizuho-ku , Nagoya 467-8603 , Japan . ;
| | - Naoki Umezawa
- Graduate School of Pharmaceutical Sciences , Nagoya City University , 3-1 Tanabe-dori, Mizuho-ku , Nagoya 467-8603 , Japan . ;
| | - Hirokazu Yagi
- Graduate School of Pharmaceutical Sciences , Nagoya City University , 3-1 Tanabe-dori, Mizuho-ku , Nagoya 467-8603 , Japan . ;
| | - Koichi Kato
- Graduate School of Pharmaceutical Sciences , Nagoya City University , 3-1 Tanabe-dori, Mizuho-ku , Nagoya 467-8603 , Japan . ;
- Exploratory Research Center on Life and Living Systems (ExCELLS) and Institute for Molecular Science (IMS) , National Institutes of Natural Sciences , 5-1 Higashiyama, Myodaiji , Okazaki 444-8787 , Japan
| | - Tsunehiko Higuchi
- Graduate School of Pharmaceutical Sciences , Nagoya City University , 3-1 Tanabe-dori, Mizuho-ku , Nagoya 467-8603 , Japan . ;
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Atlasi RS, Malik R, Corrales CI, Tzeplaeff L, Whitelegge JP, Cashman NR, Bitan G. Investigation of Anti-SOD1 Antibodies Yields New Structural Insight into SOD1 Misfolding and Surprising Behavior of the Antibodies Themselves. ACS Chem Biol 2018; 13:2794-2807. [PMID: 30110532 DOI: 10.1021/acschembio.8b00729] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mutations in Cu/Zn-superoxide dismutase (SOD1) gene are linked to 10-20% of familial amyotrophic lateral sclerosis (fALS) cases. The mutations cause misfolding and self-assembly of SOD1 into toxic oligomers and aggregates, resulting in motor neuron degeneration. The molecular mechanisms underlying SOD1 aggregation and toxicity are unclear. Characterization of misfolded SOD1 is particularly challenging because of its metastable nature. Antibodies against misfolded SOD1 are useful tools for this purpose, provided their specificity and selectivity are well-characterized. Here, we characterized three recently introduced antimisfolded SOD1 antibodies and compared them with two commercial, antimisfolded SOD1 antibodies raised against the fALS-linked variant G93A-SOD1. As controls, we compared the reactivity of these antibodies to two polyclonal anti-SOD1 antibodies expected to be insensitive to misfolding. We asked to what extent the antibodies could distinguish between WT and variant SOD1 and between native and misfolded conformations. WT, G93A-SOD1, or E100K-SOD1 were incubated under aggregation-promoting conditions and monitored using thioflavin-T fluorescence, electron microscopy, and dot blots. WT and G93A-SOD1 also were analyzed using native-PAGE/Western blot. The new antimisfolded SOD1 and the commercial antibody B8H10 showed variable reactivity using dot blots but generally showed maximum reactivity at the time misfolded SOD1 oligomers were expected to be most abundant. In contrast, only B8H10 and the control antibodies were reactive in Western blots. Unexpectedly, the polyclonal antibodies showed strong preference for the misfolded form of G93A-SOD1 in dot blots. Surprisingly, antimisfolded SOD1 antibody C4F6 was specific for the apo form of G93A-SOD1 but insensitive to misfolding. Antibody 10C12 showed preference for early misfolded structures, whereas 3H1 bound preferentially to late structures. These new antibodies allow distinction between putative early- and late-forming prefibrillar SOD1 oligomers.
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Affiliation(s)
| | | | | | | | | | - Neil R. Cashman
- Department of Neurology, University of British Columbia (UBC), Vancouver, British Columbia V6T 2B5, Canada
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Röcker A, Roan NR, Yadav JK, Fändrich M, Münch J. Structure, function and antagonism of semen amyloids. Chem Commun (Camb) 2018; 54:7557-7569. [PMID: 29873340 DOI: 10.1039/c8cc01491d] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Amyloid fibrils are linear polypeptide aggregates with a cross-β structure. These fibrils are best known for their association with neurodegenerative diseases, such as Alzheimer's or Parkinson's, but they may also be used by living organisms as functional units, e.g. in the synthesis of melanin or in the formation of bacterial biofilms. About a decade ago, in a search for semen factors that modulate infection by HIV-1 (a sexually transmitted virus and the causative agent of the acquired immune deficiency syndrome (AIDS)), it was demonstrated that semen harbors amyloid fibrils capable of markedly increasing HIV infection rates. This discovery not only created novel opportunities to prevent sexual HIV-1 transmission but also stimulated research to unravel the natural role of these factors. We discuss here the identification of these intriguing structures, their molecular properties, and their effects on both sexually transmitted diseases and reproductive health. Moreover, we review strategies to antagonize semen amyloid to prevent sexual transmission of viruses.
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Affiliation(s)
- Annika Röcker
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany.
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28
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Mittal S, Bravo-Rodriguez K, Sanchez-Garcia E. Mechanism of Inhibition of Beta Amyloid Toxicity by Supramolecular Tweezers. J Phys Chem B 2018; 122:4196-4205. [DOI: 10.1021/acs.jpcb.7b10530] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sumit Mittal
- University of Duisburg-Essen, Universitätsstraße 2, 45141 Essen, Germany
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29
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Röcker AE, Müller JA, Dietzel E, Harms M, Krüger F, Heid C, Sowislok A, Riber CF, Kupke A, Lippold S, von Einem J, Beer J, Knöll B, Becker S, Schmidt-Chanasit J, Otto M, Vapalahti O, Zelikin AN, Bitan G, Schrader T, Münch J. The molecular tweezer CLR01 inhibits Ebola and Zika virus infection. Antiviral Res 2018; 152:26-35. [PMID: 29428508 PMCID: PMC7113745 DOI: 10.1016/j.antiviral.2018.02.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 01/13/2023]
Abstract
Ebola (EBOV) and Zika viruses (ZIKV) are responsible for recent global health threats. As no preventive vaccines or antiviral drugs against these two re-emerging pathogens are available, we evaluated whether the molecular tweezer CLR01 may inhibit EBOV and ZIKV infection. This small molecule has previously been shown to inactivate HIV-1 and herpes viruses through a selective interaction with lipid-raft-rich regions in the viral envelope, which results in membrane disruption and loss of infectivity. We found that CLR01 indeed blocked infection of EBOV and ZIKV in a dose-dependent manner. The tweezer inhibited infection of epidemic ZIKV strains in cells derived from the anogenital tract and the central nervous system, and remained antivirally active in the presence of semen, saliva, urine and cerebrospinal fluid. Our findings show that CLR01 is a broad-spectrum inhibitor of enveloped viruses with prospects as a preventative microbicide or antiviral agent.
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Affiliation(s)
- Annika E Röcker
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Janis A Müller
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Erik Dietzel
- Institute of Virology, Philipps University of Marburg, 35043 Marburg, Germany; German Centre for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, 35043 Marburg, Germany
| | - Mirja Harms
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Franziska Krüger
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Christian Heid
- Faculty of Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Andrea Sowislok
- Faculty of Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | | | - Alexandra Kupke
- Institute of Virology, Philipps University of Marburg, 35043 Marburg, Germany; German Centre for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, 35043 Marburg, Germany
| | - Sina Lippold
- Institute of Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Jens von Einem
- Institute of Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Judith Beer
- Institute of Physiological Chemistry, University of Ulm, 89081 Ulm, Germany
| | - Bernd Knöll
- Institute of Physiological Chemistry, University of Ulm, 89081 Ulm, Germany
| | - Stephan Becker
- Institute of Virology, Philipps University of Marburg, 35043 Marburg, Germany; German Centre for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, 35043 Marburg, Germany
| | - Jonas Schmidt-Chanasit
- Bernhard-Nocht-Institut für Tropenmedizin, 20359 Hamburg, Germany; German Centre for Infection Research (DZIF), Partner Site Hamburg-Luebeck-Borstel, 20359 Hamburg, Germany
| | - Markus Otto
- Department of Neurology, University of Ulm, 89081 Ulm, Germany
| | - Olli Vapalahti
- Department of Virology and Immunology, University of Helsinki and Helsinki University Hospital, 00014 Helsinki, Finland; Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | | | - Gal Bitan
- David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA
| | - Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany; U-PEP and Core Facility Functional Peptidomics, Ulm University, 89081 Ulm, Germany.
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30
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Malik R, Di J, Nair G, Attar A, Taylor K, Teng E, Klärner FG, Schrader T, Bitan G. Using Molecular Tweezers to Remodel Abnormal Protein Self-Assembly and Inhibit the Toxicity of Amyloidogenic Proteins. Methods Mol Biol 2018; 1777:369-386. [PMID: 29744849 DOI: 10.1007/978-1-4939-7811-3_24] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Molecular tweezers (MTs) are broad-spectrum inhibitors of abnormal protein self-assembly, which act by binding selectively to lysine and arginine residues. Through this unique mechanism of action, MTs inhibit formation of toxic oligomers and aggregates. Their efficacy and safety have been demonstrated in vitro, in cell culture, and in animal models. Here, we discuss the application of MTs in diverse in vitro and in vivo systems, the experimental details, the scope of their use, and the limitations of the approach. We also consider methods for administration of MTs in animal models to measure efficacy, pharmacokinetic, and pharmacodynamic parameters in proteinopathies.
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Affiliation(s)
- Ravinder Malik
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
| | - Jing Di
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
| | - Gayatri Nair
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
| | - Aida Attar
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA.,Brain Research Institute, University of California at Los Angeles, Los Angeles, CA, USA
| | - Karen Taylor
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
| | - Edmond Teng
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA.,Greater Los Angeles Healthcare System, Veterans Hospital, West Los Angeles, CA, USA
| | | | - Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA. .,Brain Research Institute, University of California at Los Angeles, Los Angeles, CA, USA. .,Molecular Biology Institute, University of California at Los Angeles, Los Angeles, CA, USA.
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31
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Bier D, Mittal S, Bravo-Rodriguez K, Sowislok A, Guillory X, Briels J, Heid C, Bartel M, Wettig B, Brunsveld L, Sanchez-Garcia E, Schrader T, Ottmann C. The Molecular Tweezer CLR01 Stabilizes a Disordered Protein-Protein Interface. J Am Chem Soc 2017; 139:16256-16263. [PMID: 29039919 PMCID: PMC5691318 DOI: 10.1021/jacs.7b07939] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Indexed: 12/13/2022]
Abstract
Protein regions that are involved in protein-protein interactions (PPIs) very often display a high degree of intrinsic disorder, which is reduced during the recognition process. A prime example is binding of the rigid 14-3-3 adapter proteins to their numerous partner proteins, whose recognition motifs undergo an extensive disorder-to-order transition. In this context, it is highly desirable to control this entropy-costly process using tailored stabilizing agents. This study reveals how the molecular tweezer CLR01 tunes the 14-3-3/Cdc25CpS216 protein-protein interaction. Protein crystallography, biophysical affinity determination and biomolecular simulations unanimously deliver a remarkable finding: a supramolecular "Janus" ligand can bind simultaneously to a flexible peptidic PPI recognition motif and to a well-structured adapter protein. This binding fills a gap in the protein-protein interface, "freezes" one of the conformational states of the intrinsically disordered Cdc25C protein partner and enhances the apparent affinity of the interaction. This is the first structural and functional proof of a supramolecular ligand targeting a PPI interface and stabilizing the binding of an intrinsically disordered recognition motif to a rigid partner protein.
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Affiliation(s)
- David Bier
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Sumit Mittal
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Kenny Bravo-Rodriguez
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Andrea Sowislok
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Xavier Guillory
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Jeroen Briels
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Christian Heid
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Maria Bartel
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Burkhard Wettig
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Luc Brunsveld
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Elsa Sanchez-Garcia
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Thomas Schrader
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Christian Ottmann
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department
of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
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32
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van Dun S, Ottmann C, Milroy LG, Brunsveld L. Supramolecular Chemistry Targeting Proteins. J Am Chem Soc 2017; 139:13960-13968. [PMID: 28926241 PMCID: PMC5639466 DOI: 10.1021/jacs.7b01979] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Indexed: 12/19/2022]
Abstract
The specific recognition of protein surface elements is a fundamental challenge in the life sciences. New developments in this field will form the basis of advanced therapeutic approaches and lead to applications such as sensors, affinity tags, immobilization techniques, and protein-based materials. Synthetic supramolecular molecules and materials are creating new opportunities for protein recognition that are orthogonal to classical small molecule and protein-based approaches. As outlined here, their unique molecular features enable the recognition of amino acids, peptides, and even whole protein surfaces, which can be applied to the modulation and assembly of proteins. We believe that structural insights into these processes are of great value for the further development of this field and have therefore focused this Perspective on contributions that provide such structural data.
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Affiliation(s)
- Sam van Dun
- Laboratory of Chemical Biology
and Institute for Complex Molecular Systems, Department of Biomedical
Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology
and Institute for Complex Molecular Systems, Department of Biomedical
Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology
and Institute for Complex Molecular Systems, Department of Biomedical
Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Luc Brunsveld
- Laboratory of Chemical Biology
and Institute for Complex Molecular Systems, Department of Biomedical
Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
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33
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Xu N, Bitan G, Schrader T, Klärner FG, Osinska H, Robbins J. Inhibition of Mutant αB Crystallin-Induced Protein Aggregation by a Molecular Tweezer. J Am Heart Assoc 2017; 6:JAHA.117.006182. [PMID: 28862927 PMCID: PMC5586456 DOI: 10.1161/jaha.117.006182] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Compromised protein quality control causes the accumulation of misfolded proteins and intracellular aggregates, contributing to cardiac disease and heart failure. The development of therapeutics directed at proteotoxicity‐based pathology in heart disease is just beginning. The molecular tweezer CLR01 is a broad‐spectrum inhibitor of abnormal self‐assembly of amyloidogenic proteins, including amyloid β‐protein, tau, and α‐synuclein. This small molecule interferes with aggregation by binding selectively to lysine side chains, changing the charge distribution of aggregation‐prone proteins and thereby disrupting aggregate formation. However, the effects of CLR01 in cardiomyocytes undergoing proteotoxic stress have not been explored. Here we assess whether CLR01 can decrease cardiac protein aggregation catalyzed by cardiomyocyte‐specific expression of mutated αB‐crystallin (CryABR120G). Methods and Results A proteotoxic model of desmin‐related cardiomyopathy caused by cardiomyocyte‐specific expression of CryABR120G was used to test the efficacy of CLR01 therapy in the heart. Neonatal rat cardiomyocytes were infected with adenovirus expressing either wild‐type CryAB or CryABR120G. Subsequently, the cells were treated with different doses of CLR01 or a closely related but inactive derivative, CLR03. CLR01 decreased aggregate accumulation and attenuated cytotoxicity caused by CryABR120G expression in a dose‐dependent manner, whereas CLR03 had no effect. Ubiquitin‐proteasome system function was analyzed using a ubiquitin‐proteasome system reporter protein consisting of a short degron, CL1, fused to the COOH‐terminus of green fluorescent protein. CLR01 improved proteasomal function in CryABR120G cardiomyocytes but did not alter autophagic flux. In vivo, CLR01 administration also resulted in reduced protein aggregates in CryABR120G transgenic mice. Conclusions CLR01 can inhibit CryABR120G aggregate formation and decrease cytotoxicity in cardiomyocytes undergoing proteotoxic stress, presumably through clearance of the misfolded protein via increased proteasomal function. CLR01 or related compounds may be therapeutically useful in treating the pathogenic sequelae resulting from proteotoxic heart disease.
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Affiliation(s)
- Na Xu
- Division of Molecular Cardiovascular Biology, the Heart Institute, Cincinnati Children's Hospital, Cincinnati, OH
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles, CA
| | - Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany
| | | | - Hanna Osinska
- Division of Molecular Cardiovascular Biology, the Heart Institute, Cincinnati Children's Hospital, Cincinnati, OH
| | - Jeffrey Robbins
- Division of Molecular Cardiovascular Biology, the Heart Institute, Cincinnati Children's Hospital, Cincinnati, OH
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34
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Breydo L, Redington JM, Uversky VN. Effects of Intrinsic and Extrinsic Factors on Aggregation of Physiologically Important Intrinsically Disordered Proteins. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2016; 329:145-185. [PMID: 28109327 DOI: 10.1016/bs.ircmb.2016.08.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Misfolding and aggregation of proteins and peptides play an important role in a number of diseases as well as in many physiological processes. Many of the proteins that misfold and aggregate in vivo are intrinsically disordered. Protein aggregation is a complex multistep process, and aggregates can significantly differ in morphology, structure, stability, cytotoxicity, and self-propagation ability. The aggregation process is influenced by both intrinsic (e.g., mutations and expression levels) and extrinsic (e.g., polypeptide chain truncation, macromolecular crowding, posttranslational modifications, as well as interaction with metal ions, other small molecules, lipid membranes, and chaperons) factors. This review examines the effect of a variety of these factors on aggregation of physiologically important intrinsically disordered proteins.
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Affiliation(s)
- L Breydo
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.
| | - J M Redington
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - V N Uversky
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States; Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia.
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35
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Schrader T, Bitan G, Klärner FG. Molecular tweezers for lysine and arginine - powerful inhibitors of pathologic protein aggregation. Chem Commun (Camb) 2016; 52:11318-34. [PMID: 27546596 PMCID: PMC5026632 DOI: 10.1039/c6cc04640a] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Molecular tweezers represent the first class of artificial receptor molecules that have made the way from a supramolecular host to a drug candidate with promising results in animal tests. Due to their unique structure, only lysine and arginine are well complexed with exquisite selectivity by a threading mechanism, which unites electrostatic, hydrophobic and dispersive attraction. However, tweezer design must avoid self-dimerization, self-inclusion and external guest binding. Moderate affinities of molecular tweezers towards sterically well accessible basic amino acids with fast on and off rates protect normal proteins from potential interference with their biological function. However, the early stages of abnormal Aβ, α-synuclein, and TTR assembly are redirected upon tweezer binding towards the generation of amorphous non-toxic materials that can be degraded by the intracellular and extracellular clearance mechanisms. Thus, specific host-guest chemistry between aggregation-prone proteins and lysine/arginine binders rescues cell viability and restores animal health in models of AD, PD, and TTR amyloidosis.
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Affiliation(s)
- Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany.
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36
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Pinalli R, Brancatelli G, Pedrini A, Menozzi D, Hernández D, Ballester P, Geremia S, Dalcanale E. The Origin of Selectivity in the Complexation of N-Methyl Amino Acids by Tetraphosphonate Cavitands. J Am Chem Soc 2016; 138:8569-80. [PMID: 27310660 DOI: 10.1021/jacs.6b04372] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report on the eligibility of tetraphosphonate resorcinarene cavitands for the molecular recognition of amino acids. We determined the crystal structure of 13 complexes of the tetraphosphonate cavitand Tiiii[H, CH3, CH3] with amino acids. (1)H NMR and (31)P NMR experiments and ITC analysis were performed to probe the binding between cavitand Tiiii[C3H7, CH3, C2H5] or the water-soluble counterpart Tiiii[C3H6Py(+)Cl(-), CH3, C2H5] and a selection of representative amino acids. The reported studies and results allowed us (i) to highlight the noncovalent interactions involved in the binding event in each case; (ii) to investigate the ability of tetraphosphonate cavitand receptors to discriminate between the different amino acids; (iii) to calculate the Ka values of the different complexes formed and evaluate the thermodynamic parameters of the complexation process, dissecting the entropic and enthalpic contributions; and (iv) to determine the solvent influence on the complexation selectivity. By moving from methanol to water, the complexation changed from entropy driven to entropy opposed, leading to a drop of almost three orders in the magnitude of the Ka. However, this reduction in binding affinity is associated with a dramatic increase in selectivity, since in aqueous solutions only N-methylated amino acids are effectively recognized. The thermodynamic profile of the binding does not change in PBS solution. The pivotal role played by cation-π interactions is demonstrated by the linear correlation found between the log Ka in methanol solution and the depth of (+)N-CH3 cavity inclusion in the molecular structures. These findings are relevant for the potential use of phosphonate cavitands as synthetic receptors for the detection of epigenetic modifications of histones in physiological media.
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Affiliation(s)
- Roberta Pinalli
- Department of Chemistry, University of Parma, and INSTM , UdR Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Giovanna Brancatelli
- CEB Centre of Excellence in Biocrystallography, Department of Chemical and Pharmaceutical Sciences, University of Trieste , Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Alessandro Pedrini
- Department of Chemistry, University of Parma, and INSTM , UdR Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Daniela Menozzi
- Department of Chemistry, University of Parma, and INSTM , UdR Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Daniel Hernández
- Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Pablo Ballester
- Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluís Companys, 23, 08018 Barcelona, Spain.,Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Avgda. Països Catalans 16, 43007 Tarragona, Spain
| | - Silvano Geremia
- CEB Centre of Excellence in Biocrystallography, Department of Chemical and Pharmaceutical Sciences, University of Trieste , Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Enrico Dalcanale
- Department of Chemistry, University of Parma, and INSTM , UdR Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
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37
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Li X, Wan M, Gao L, Fang W. Mechanism of Inhibition of Human Islet Amyloid Polypeptide-Induced Membrane Damage by a Small Organic Fluorogen. Sci Rep 2016; 6:21614. [PMID: 26887358 PMCID: PMC4757883 DOI: 10.1038/srep21614] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 01/27/2016] [Indexed: 11/09/2022] Open
Abstract
Human islet amyloid polypeptide (hIAPP) is believed to be responsible for the death of insulin-producing β-cells. However, the mechanism of membrane damage at the molecular level has not been fully elucidated. In this article, we employ coarse- grained dissipative particle dynamics simulations to study the interactions between a lipid bilayer membrane composed of 70% zwitterionic lipids and 30% anionic lipids and hIAPPs with α-helical structures. We demonstrated that the key factor controlling pore formation is the combination of peptide charge-induced electroporation and peptide hydrophobicity-induced lipid disordering and membrane thinning. According to these mechanisms, we suggest that a water-miscible tetraphenylethene BSPOTPE is a potent inhibitor to rescue hIAPP-induced cytotoxicity. Our simulations predict that BSPOTPE molecules can bind directly to the helical regions of hIAPP and form oligomers with separated hydrophobic cores and hydrophilic shells. The micelle-like hIAPP-BSPOTPE clusters tend to be retained in the water/membrane interface and aggregate therein rather than penetrate into the membrane. Electrostatic attraction between BSPOTPE and hIAPP also reduces the extent of hIAPP binding to the anionic lipid bilayer. These two modes work together and efficiently prevent membrane poration.
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Affiliation(s)
- Xiaoxu Li
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Mingwei Wan
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Lianghui Gao
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
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38
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de Almeida NEC, Do TD, Tro M, LaPointe NE, Feinstein SC, Shea JE, Bowers MT. Opposing Effects of Cucurbit[7]uril and 1,2,3,4,6-Penta-O-galloyl-β-d-glucopyranose on Amyloid β25-35 Assembly. ACS Chem Neurosci 2016; 7:218-26. [PMID: 26629788 PMCID: PMC4758880 DOI: 10.1021/acschemneuro.5b00280] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease characterized by extracellular deposits of amyloid β protein (Aβ) in the brain. The conversion of soluble monomers to amyloid Aβ fibrils is a complicated process and involves several transient oligomeric species, which are widely believed to be highly toxic and play a crucial role in the etiology of AD. The development of inhibitors to prevent formation of small and midsized oligomers is a promising strategy for AD treatment. In this work, we employ ion mobility spectrometry (IMS), transmission electron microscopy (TEM), and molecular dynamics (MD) simulations to elucidate the structural modulation promoted by two potential inhibitors of Aβ oligomerization, cucurbit[7]uril (CB[7]) and 1,2,3,4,6-penta-O-galloyl-β-d-glucopyranose (PGG), on early oligomer and fibril formation of the Aβ25-35 fragment. One and two CB[7] molecules bind to Aβ25-35 monomers and dimers, respectively, and suppress aggregation by remodeling early oligomer structures and inhibiting the formation of higher-order oligomers. On the other hand, nonselective binding was observed between PGG and Aβ25-35. The interactions between PGG and Aβ25-35, surprisingly, enhanced the formation of Aβ aggregates by promoting extended Aβ25-35 conformations in both homo- and hetero-oligomers. When both ligands were present, the inhibitory effect of CB[7] overrode the stimulatory effect of PGG on Aβ25-35 aggregation, suppressing the formation of large amyloid oligomers and eliminating the structural conversion from isotropic to β-rich topologies induced by PGG. Our results provide mechanistic insights into CB[7] and PGG action on Aβ oligomerization. They also demonstrate the power of the IMS technique to investigate mechanisms of multiple small-molecule agents on the amyloid formation process.
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Affiliation(s)
- Natália E. C. de Almeida
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Thanh D. Do
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Michael Tro
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Nichole E. LaPointe
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, California 93106, United States
| | - Stuart C. Feinstein
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, California 93106, United States
| | - Joan-Emma Shea
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Michael T. Bowers
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
- Corresponding author: Michael T. Bowers. Tel: +1-805-893-2673;
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39
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Nguyen PT, Sharma R, Rej R, De Carufel CA, Roy R, Bourgault S. Low generation anionic dendrimers modulate islet amyloid polypeptide self-assembly and inhibit pancreatic β-cell toxicity. RSC Adv 2016. [DOI: 10.1039/c6ra15373a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The self-assembly and cytotoxicity of the amyloidogenic peptide IAPP can be controlled with low generation anionic dendrimers.
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Affiliation(s)
- Phuong T. Nguyen
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Rishi Sharma
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Rabindra Rej
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | | | - René Roy
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Steve Bourgault
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
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40
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Sun Q, Zhao J, Zhang Y, Yang H, Zhou P. A natural hyperbranched proteoglycan inhibits IAPP amyloid fibrillation and attenuates β-cell apoptosis. RSC Adv 2016. [DOI: 10.1039/c6ra23429a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A natural amphiphilic hyperbranched proteoglycan efficiently inhibits IAPP fibrillation and attenuates β-cell apoptosis for type 2 diabetes treatment.
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Affiliation(s)
- Qing Sun
- Department of Macromolecular Science
- State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai
- China
| | - Juan Zhao
- Department of Macromolecular Science
- State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai
- China
| | - Yuan Zhang
- Department of Medicine
- St Vincent's Hospital
- The University of Melbourne
- Fitzroy
- Australia
| | - Hongjie Yang
- Yueyang Hospital of Integrated Chinese and Western Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai
- China
| | - Ping Zhou
- Department of Macromolecular Science
- State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai
- China
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41
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Lump E, Castellano LM, Meier C, Seeliger J, Erwin N, Sperlich B, Stürzel CM, Usmani S, Hammond RM, von Einem J, Gerold G, Kreppel F, Bravo-Rodriguez K, Pietschmann T, Holmes VM, Palesch D, Zirafi O, Weissman D, Sowislok A, Wettig B, Heid C, Kirchhoff F, Weil T, Klärner FG, Schrader T, Bitan G, Sanchez-Garcia E, Winter R, Shorter J, Münch J. A molecular tweezer antagonizes seminal amyloids and HIV infection. eLife 2015; 4. [PMID: 26284498 PMCID: PMC4536748 DOI: 10.7554/elife.05397] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 07/20/2015] [Indexed: 12/26/2022] Open
Abstract
Semen is the main vector for HIV transmission and contains amyloid fibrils that enhance viral infection. Available microbicides that target viral components have proven largely ineffective in preventing sexual virus transmission. In this study, we establish that CLR01, a ‘molecular tweezer’ specific for lysine and arginine residues, inhibits the formation of infectivity-enhancing seminal amyloids and remodels preformed fibrils. Moreover, CLR01 abrogates semen-mediated enhancement of viral infection by preventing the formation of virion–amyloid complexes and by directly disrupting the membrane integrity of HIV and other enveloped viruses. We establish that CLR01 acts by binding to the target lysine and arginine residues rather than by a non-specific, colloidal mechanism. CLR01 counteracts both host factors that may be important for HIV transmission and the pathogen itself. These combined anti-amyloid and antiviral activities make CLR01 a promising topical microbicide for blocking infection by HIV and other sexually transmitted viruses. DOI:http://dx.doi.org/10.7554/eLife.05397.001 Human Immunodeficiency Virus (HIV) is a sexually transmitted virus that can cause a serious disease that weakens the immune system. The virus is most commonly transmitted between individuals in semen, the male reproductive fluid. Semen contains deposits of protein fragments called amyloid fibrils, which can increase the transmission of HIV by trapping viral particles. This helps the virus to attach to the membranes surrounding human cells, which increases the risk of infection. Therefore, therapies that reduce the levels of amyloid fibrils in semen might be able to reduce the transmission of HIV. Drugs that prevent amyloid formation are already being developed because structurally similar fibrils can also form in the brains of individuals with neurodegenerative diseases. One such molecule—called CLR01—works by binding to particular sites on the proteins that form fibrils in the brain. This inhibits fibril formation and slowly disassembles the fibrils that have already formed. CLR01 physically interacts with these residues in a way that resembles a tweezer. The peptides in the amyloid fibrils in semen also have these sites, which suggests that CLR01 might also disrupt amyloid fibrils from forming in semen. Here Lump and Castellano et al. show that CLR01 can both disrupt fibril formation and remodel fibrils that have already formed. In addition, CLR01 prevents HIV particles from interacting with these fibrils and can displace the virus particles that have already bound to the fibrils. In the presence of CLR01, human cells exposed to semen that contained HIV were less likely to become infected with the virus. Unexpectedly, CLR01 also directly destroys HIV and other enveloped viruses such as HCV or HSV particles by disrupting the membranes that surround the virus. Therefore, Lump and Castellano et al.'s findings reveal that CLR01 has considerable potential to be used as an agent for reducing the transmission of HIV and other sexually transmitted viral diseases. DOI:http://dx.doi.org/10.7554/eLife.05397.002
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Affiliation(s)
- Edina Lump
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Laura M Castellano
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States.,Pharmacology Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States
| | - Christoph Meier
- Institute of Organic Chemistry III/Macromolecular Chemistry, Ulm University, Ulm, Germany
| | - Janine Seeliger
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, Technical University of Dortmund, Dortmund, Germany
| | - Nelli Erwin
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, Technical University of Dortmund, Dortmund, Germany
| | - Benjamin Sperlich
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, Technical University of Dortmund, Dortmund, Germany
| | - Christina M Stürzel
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Shariq Usmani
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Rebecca M Hammond
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States.,Biology Department, Swarthmore College, Swarthmore, United States
| | - Jens von Einem
- Institute of Virology, Ulm University Medical Center, Ulm, Germany
| | - Gisa Gerold
- Institute of Experimental Virology, Twincore, Centre for Experimental and Clinical Infection Research, Hannover, Germany
| | - Florian Kreppel
- Institute of Gene Therapy, Ulm University Medical Center, Ulm, Germany
| | | | - Thomas Pietschmann
- Institute of Experimental Virology, Twincore, Centre for Experimental and Clinical Infection Research, Hannover, Germany
| | - Veronica M Holmes
- Division of Infectious Diseases, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States
| | - David Palesch
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Onofrio Zirafi
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Drew Weissman
- Division of Infectious Diseases, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States
| | - Andrea Sowislok
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Burkhard Wettig
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Christian Heid
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Frank Kirchhoff
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.,Ulm-Peptide Pharmaceuticals, Ulm University, Ulm, Germany
| | - Tanja Weil
- Institute of Organic Chemistry III/Macromolecular Chemistry, Ulm University, Ulm, Germany.,Ulm-Peptide Pharmaceuticals, Ulm University, Ulm, Germany
| | | | - Thomas Schrader
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, United States.,Brain Research Institute, University of California at Los Angeles, Los Angeles, Los Angeles, United States.,Molecular Biology Institute, University of California, Los Angeles, United States
| | | | - Roland Winter
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, Technical University of Dortmund, Dortmund, Germany
| | - James Shorter
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States.,Pharmacology Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, United States
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.,Ulm-Peptide Pharmaceuticals, Ulm University, Ulm, Germany
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42
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Breydo L, Uversky VN. Structural, morphological, and functional diversity of amyloid oligomers. FEBS Lett 2015; 589:2640-8. [PMID: 26188543 DOI: 10.1016/j.febslet.2015.07.013] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 07/08/2015] [Accepted: 07/11/2015] [Indexed: 12/19/2022]
Abstract
Protein misfolding and aggregation are known to play a crucial role in a number of important human diseases (Alzheimer's, Parkinson's, prion, diabetes, cataracts, etc.) as well as in a multitude of physiological processes. Protein aggregation is a highly complex process resulting in a variety of aggregates with different structures and morphologies. Oligomeric protein aggregates (amyloid oligomers) are formed as both intermediates and final products of the aggregation process. They are believed to play an important role in many protein aggregation-related diseases, and many of them are highly cytotoxic. Due to their instability and structural heterogeneity, information about structure, mechanism of formation, and physiological effects of amyloid oligomers is sparse. This review attempts to summarize the existing information on the major properties of amyloid oligomers.
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Affiliation(s)
- Leonid Breydo
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA.
| | - Vladimir N Uversky
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; Institute for Biological Instrumentation, Russian Academy of Sciences, Pushchino, Moscow Region, Russian Federation; Department of Biology, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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