1
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Ghosh S, Tamilselvi S, Williams C, Jayaweera SW, Iashchishyn IA, Šulskis D, Gilthorpe JD, Olofsson A, Smirnovas V, Svedružić ŽM, Morozova-Roche LA. ApoE Isoforms Inhibit Amyloid Aggregation of Proinflammatory Protein S100A9. Int J Mol Sci 2024; 25:2114. [PMID: 38396791 PMCID: PMC10889306 DOI: 10.3390/ijms25042114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Increasing evidence suggests that the calcium-binding and proinflammatory protein S100A9 is an important player in neuroinflammation-mediated Alzheimer's disease (AD). The amyloid co-aggregation of S100A9 with amyloid-β (Aβ) is an important hallmark of this pathology. Apolipoprotein E (ApoE) is also known to be one of the important genetic risk factors of AD. ApoE primarily exists in three isoforms, ApoE2 (Cys112/Cys158), ApoE3 (Cys112/Arg158), and ApoE4 (Arg112/Arg158). Even though the difference lies in just two amino acid residues, ApoE isoforms produce differential effects on the neuroinflammation and activation of the microglial state in AD. Here, we aim to understand the effect of the ApoE isoforms on the amyloid aggregation of S100A9. We found that both ApoE3 and ApoE4 suppress the aggregation of S100A9 in a concentration-dependent manner, even at sub-stoichiometric ratios compared to S100A9. These interactions lead to a reduction in the quantity and length of S100A9 fibrils. The inhibitory effect is more pronounced if ApoE isoforms are added in the lipid-free state versus lipidated ApoE. We found that, upon prolonged incubation, S100A9 and ApoE form low molecular weight complexes with stochiometric ratios of 1:1 and 2:1, which remain stable under SDS-gel conditions. These complexes self-assemble also under the native conditions; however, their interactions are transient, as revealed by glutaraldehyde cross-linking experiments and molecular dynamics (MD) simulation. MD simulation demonstrated that the lipid-binding C-terminal domain of ApoE and the second EF-hand calcium-binding motif of S100A9 are involved in these interactions. We found that amyloids of S100A9 are cytotoxic to neuroblastoma cells, and the presence of either ApoE isoforms does not change the level of their cytotoxicity. A significant inhibitory effect produced by both ApoE isoforms on S100A9 amyloid aggregation can modulate the amyloid-neuroinflammatory cascade in AD.
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Affiliation(s)
- Shamasree Ghosh
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Shanmugam Tamilselvi
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Chloe Williams
- Department of Medical and Translational Biology, Umeå University, SE-90187 Umeå, Sweden; (C.W.); (J.D.G.)
| | - Sanduni W. Jayaweera
- Department of Clinical Microbiology, Umeå University, SE-90187 Umeå, Sweden; (S.W.J.); (A.O.)
| | - Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Darius Šulskis
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania; (D.Š.); (V.S.)
| | - Jonathan D. Gilthorpe
- Department of Medical and Translational Biology, Umeå University, SE-90187 Umeå, Sweden; (C.W.); (J.D.G.)
| | - Anders Olofsson
- Department of Clinical Microbiology, Umeå University, SE-90187 Umeå, Sweden; (S.W.J.); (A.O.)
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania; (D.Š.); (V.S.)
| | | | - Ludmilla A. Morozova-Roche
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
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2
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Berntsson E, Vosough F, Svantesson T, Pansieri J, Iashchishyn IA, Ostojić L, Dong X, Paul S, Jarvet J, Roos PM, Barth A, Morozova-Roche LA, Gräslund A, Wärmländer SKTS. Residue-specific binding of Ni(II) ions influences the structure and aggregation of amyloid beta (Aβ) peptides. Sci Rep 2023; 13:3341. [PMID: 36849796 PMCID: PMC9971182 DOI: 10.1038/s41598-023-29901-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 02/13/2023] [Indexed: 03/01/2023] Open
Abstract
Alzheimer's disease (AD) is the most common cause of dementia worldwide. AD brains display deposits of insoluble amyloid plaques consisting mainly of aggregated amyloid-β (Aβ) peptides, and Aβ oligomers are likely a toxic species in AD pathology. AD patients display altered metal homeostasis, and AD plaques show elevated concentrations of metals such as Cu, Fe, and Zn. Yet, the metal chemistry in AD pathology remains unclear. Ni(II) ions are known to interact with Aβ peptides, but the nature and effects of such interactions are unknown. Here, we use numerous biophysical methods-mainly spectroscopy and imaging techniques-to characterize Aβ/Ni(II) interactions in vitro, for different Aβ variants: Aβ(1-40), Aβ(1-40)(H6A, H13A, H14A), Aβ(4-40), and Aβ(1-42). We show for the first time that Ni(II) ions display specific binding to the N-terminal segment of full-length Aβ monomers. Equimolar amounts of Ni(II) ions retard Aβ aggregation and direct it towards non-structured aggregates. The His6, His13, and His14 residues are implicated as binding ligands, and the Ni(II)·Aβ binding affinity is in the low µM range. The redox-active Ni(II) ions induce formation of dityrosine cross-links via redox chemistry, thereby creating covalent Aβ dimers. In aqueous buffer Ni(II) ions promote formation of beta sheet structure in Aβ monomers, while in a membrane-mimicking environment (SDS micelles) coil-coil helix interactions appear to be induced. For SDS-stabilized Aβ oligomers, Ni(II) ions direct the oligomers towards larger sizes and more diverse (heterogeneous) populations. All of these structural rearrangements may be relevant for the Aβ aggregation processes that are involved in AD brain pathology.
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Affiliation(s)
- Elina Berntsson
- Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91, Stockholm, Sweden. .,Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia.
| | - Faraz Vosough
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Teodor Svantesson
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Jonathan Pansieri
- grid.12650.300000 0001 1034 3451Department of Medical Biochemistry and Biophysics, Umeå University, 901 87 Umeå, Sweden
| | - Igor A. Iashchishyn
- grid.12650.300000 0001 1034 3451Department of Medical Biochemistry and Biophysics, Umeå University, 901 87 Umeå, Sweden
| | - Lucija Ostojić
- grid.12650.300000 0001 1034 3451Department of Medical Biochemistry and Biophysics, Umeå University, 901 87 Umeå, Sweden
| | - Xiaolin Dong
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Suman Paul
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Jüri Jarvet
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden ,grid.177284.f0000 0004 0410 6208The National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Per M. Roos
- grid.4714.60000 0004 1937 0626Institute of Environmental Medicine, Karolinska Institutet, Nobels Väg 13, 171 77 Stockholm, Sweden ,Department of Clinical Physiology, Capio St. Göran Hospital, St. Göransplan 1, 112 19 Stockholm, Sweden
| | - Andreas Barth
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Ludmilla A. Morozova-Roche
- grid.12650.300000 0001 1034 3451Department of Medical Biochemistry and Biophysics, Umeå University, 901 87 Umeå, Sweden
| | - Astrid Gräslund
- grid.10548.380000 0004 1936 9377Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
| | - Sebastian K. T. S. Wärmländer
- grid.10548.380000 0004 1936 9377Chemistry Section, Arrhenius Laboratories, Stockholm University, 106 91, Stockholm, Sweden
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Majda M, Kozlova L, Banasiak A, Derba-Maceluch M, Iashchishyn IA, Morozova-Roche LA, Smith RS, Gorshkova T, Mellerowicz EJ. Elongation of wood fibers combines features of diffuse and tip growth. New Phytol 2021; 232:673-691. [PMID: 33993523 DOI: 10.1111/nph.17468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
Xylem fibers are highly elongated cells that are key constituents of wood, play major physiological roles in plants, comprise an important terrestrial carbon reservoir, and thus have enormous ecological and economic importance. As they develop, from fusiform initials, their bodies remain the same length while their tips elongate and intrude into intercellular spaces. To elucidate mechanisms of tip elongation, we studied the cell wall along the length of isolated, elongating aspen xylem fibers and used computer simulations to predict the forces driving the intercellular space formation required for their growth. We found pectin matrix epitopes (JIM5, LM7) concentrated at the tips where cellulose microfibrils have transverse orientation, and xyloglucan epitopes (CCRC-M89, CCRC-M58) in fiber bodies where microfibrils are disordered. These features are accompanied by changes in cell wall thickness, indicating that while the cell wall elongates strictly at the tips, it is deposited all over fibers. Computer modeling revealed that the intercellular space formation needed for intrusive growth may only require targeted release of cell adhesion, which allows turgor pressure in neighboring fiber cells to 'round' the cells creating spaces. These characteristics show that xylem fibers' elongation involves a distinct mechanism that combines features of both diffuse and tip growth.
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Affiliation(s)
- Mateusz Majda
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre (UPSC), Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
- Department of Computational and Systems Biology, John Innes Centre, Norwich Research Park, Colney Lane, Norwich, NR4 7UH, UK
| | - Liudmila Kozlova
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre (UPSC), Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Centre, Russian Academy of Sciences, Kazan, 420111, Russia
| | - Alicja Banasiak
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre (UPSC), Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
- Department of Plant Developmental Biology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, Wrocław, 50-328, Poland
| | - Marta Derba-Maceluch
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre (UPSC), Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, SE-901 87, Sweden
| | | | - Richard S Smith
- Department of Computational and Systems Biology, John Innes Centre, Norwich Research Park, Colney Lane, Norwich, NR4 7UH, UK
| | - Tatyana Gorshkova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Centre, Russian Academy of Sciences, Kazan, 420111, Russia
| | - Ewa J Mellerowicz
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre (UPSC), Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
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Chaudhary H, Iashchishyn IA, Romanova NV, Rambaran MA, Musteikyte G, Smirnovas V, Holmboe M, Ohlin CA, Svedružić ŽM, Morozova-Roche LA. Polyoxometalates as Effective Nano-inhibitors of Amyloid Aggregation of Pro-inflammatory S100A9 Protein Involved in Neurodegenerative Diseases. ACS Appl Mater Interfaces 2021; 13:26721-26734. [PMID: 34080430 PMCID: PMC8289188 DOI: 10.1021/acsami.1c04163] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Pro-inflammatory and amyloidogenic S100A9 protein is central to the amyloid-neuroinflammatory cascade in neurodegenerative diseases. Polyoxometalates (POMs) constitute a diverse group of nanomaterials, which showed potency in amyloid inhibition. Here, we have demonstrated that two selected nanosized niobium POMs, Nb10 and TiNb9, can act as potent inhibitors of S100A9 amyloid assembly. Kinetics analysis based on ThT fluorescence experiments showed that addition of either Nb10 or TiNb9 reduces the S100A9 amyloid formation rate and amyloid quantity. Atomic force microscopy imaging demonstrated the complete absence of long S100A9 amyloid fibrils at increasing concentrations of either POM and the presence of only round-shaped and slightly elongated aggregates. Molecular dynamics simulation revealed that both Nb10 and TiNb9 bind to native S100A9 homo-dimer by forming ionic interactions with the positively charged Lys residue-rich patches on the protein surface. The acrylamide quenching of intrinsic fluorescence showed that POM binding does not perturb the Trp 88 environment. The far and near UV circular dichroism revealed no large-scale perturbation of S100A9 secondary and tertiary structures upon POM binding. These indicate that POM binding involves only local conformational changes in the binding sites. By using intrinsic and 8-anilino-1-naphthalene sulfonate fluorescence titration experiments, we found that POMs bind to S100A9 with a Kd of ca. 2.5 μM. We suggest that the region, including Lys 50 to Lys 54 and characterized by high amyloid propensity, could be the key sequences involved in S1009 amyloid self-assembly. The inhibition and complete hindering of S100A9 amyloid pathways may be used in the therapeutic applications targeting the amyloid-neuroinflammatory cascade in neurodegenerative diseases.
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Affiliation(s)
- Himanshu Chaudhary
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | - Igor A. Iashchishyn
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | - Nina V. Romanova
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | | | - Greta Musteikyte
- Institute
of Biotechnology, Life Sciences Center, Vilnius University, Vilnius LT-10257, Lithuania
| | - Vytautas Smirnovas
- Institute
of Biotechnology, Life Sciences Center, Vilnius University, Vilnius LT-10257, Lithuania
| | - Michael Holmboe
- Department
of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - C. André Ohlin
- Department
of Chemistry, Umeå University, 90187 Umeå, Sweden
| | | | - Ludmilla A. Morozova-Roche
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
- . Tel.: +46736205283. Fax: +46907865283
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5
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Leri M, Chaudhary H, Iashchishyn IA, Pansieri J, Svedružić ŽM, Gómez Alcalde S, Musteikyte G, Smirnovas V, Stefani M, Bucciantini M, Morozova-Roche LA. Natural Compound from Olive Oil Inhibits S100A9 Amyloid Formation and Cytotoxicity: Implications for Preventing Alzheimer's Disease. ACS Chem Neurosci 2021; 12:1905-1918. [PMID: 33979140 PMCID: PMC8291483 DOI: 10.1021/acschemneuro.0c00828] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
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Polyphenolic compounds
in the Mediterranean diet have received
increasing attention due to their protective properties in amyloid
neurodegenerative and many other diseases. Here, we have demonstrated
for the first time that polyphenol oleuropein aglycone (OleA), which
is the most abundant compound in olive oil, has multiple potencies
for the inhibition of amyloid self-assembly of pro-inflammatory protein
S100A9 and the mitigation of the damaging effect of its amyloids on
neuroblastoma SH-SY5Y cells. OleA directly interacts with both native
and fibrillar S100A9 as shown by intrinsic fluorescence and molecular
dynamic simulation. OleA prevents S100A9 amyloid oligomerization as
shown using amyloid oligomer-specific antibodies and cross-β-sheet
formation detected by circular dichroism. It decreases the length
of amyloid fibrils measured by atomic force microscopy (AFM) as well
as reduces the effective rate of amyloid growth and the overall amyloid
load as derived from the kinetic analysis of amyloid formation. OleA
disintegrates already preformed fibrils of S100A9, converting them
into nonfibrillar and nontoxic aggregates as revealed by amyloid thioflavin-T
dye binding, AFM, and cytotoxicity assays. At the cellular level,
OleA targets S100A9 amyloids already at the membranes as shown by
immunofluorescence and fluorescence resonance energy transfer, significantly
reducing the amyloid accumulation in GM1 ganglioside containing membrane
rafts. OleA increases overall cell viability when neuroblastoma cells
are subjected to the amyloid load and alleviates amyloid-induced intracellular
rise of reactive oxidative species and free Ca2+. Since
S100A9 is both a pro-inflammatory and amyloidogenic protein, OleA
may effectively mitigate the pathological consequences of the S100A9-dependent
amyloid-neuroinflammatory cascade as well as provide protection from
neurodegeneration, if used within the Mediterranean diet as a potential
preventive measure.
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Affiliation(s)
- Manuela Leri
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, 50139 Florence, Italy
| | - Himanshu Chaudhary
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | | | - Silvia Gómez Alcalde
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Greta Musteikyte
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Massimo Stefani
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
| | - Monica Bucciantini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
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Jakubec M, Bariås E, Furse S, Govasli ML, George V, Turcu D, Iashchishyn IA, Morozova-Roche LA, Halskau Ø. Cholesterol-containing lipid nanodiscs promote an α-synuclein binding mode that accelerates oligomerization. FEBS J 2021; 288:1887-1905. [PMID: 32892498 DOI: 10.1111/febs.15551] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 07/28/2020] [Accepted: 09/01/2020] [Indexed: 01/09/2023]
Abstract
Dysregulation of the biosynthesis of cholesterol and other lipids has been implicated in many neurological diseases, including Parkinson's disease. Misfolding of α-synuclein (α-Syn), the main actor in Parkinson's disease, is associated with changes in a lipid environment. However, the exact molecular mechanisms underlying cholesterol effect on α-Syn binding to lipids as well as α-Syn oligomerization and fibrillation remain elusive, as does the relative importance of cholesterol compared to other factors. We probed the interactions and fibrillation behaviour of α-Syn using styrene-maleic acid nanodiscs, containing zwitterionic and anionic lipid model systems with and without cholesterol. Surface plasmon resonance and thioflavin T fluorescence assays were employed to monitor α-Syn binding, as well as fibrillation in the absence and presence of membrane models. 1 H-15 N-correlated NMR was used to monitor the fold of α-Syn in response to nanodisc binding, determining individual residue apparent affinities for the nanodisc-contained bilayers. The addition of cholesterol inhibited α-Syn interaction with lipid bilayers and, however, significantly promoted α-Syn fibrillation, with a more than a 20-fold reduction of lag times before fibrillation onset. When α-Syn bilayer interactions were analysed at an individual residue level by solution-state NMR, we observed two different effects of cholesterol. In nanodiscs made of DOPC, the addition of cholesterol modulated the NAC part of α-Syn, leading to stronger interaction of this region with the lipid bilayer. In contrast, in the nanodiscs comprising DOPC, DOPE and DOPG, the NAC part was mostly unaffected by the presence of cholesterol, while the binding of the N and the C termini was both inhibited.
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Affiliation(s)
- Martin Jakubec
- Department of Biological Sciences, University of Bergen, Norway
- Department of Molecular Biology, University of Bergen, Norway
| | - Espen Bariås
- Department of Biological Sciences, University of Bergen, Norway
- Department of Molecular Biology, University of Bergen, Norway
| | - Samuel Furse
- Department of Molecular Biology, University of Bergen, Norway
| | - Morten L Govasli
- Department of Biological Sciences, University of Bergen, Norway
- Department of Molecular Biology, University of Bergen, Norway
- Division of Infection and Immunity, University College London, London, UK
| | - Vinnit George
- Department of Chemistry, University of Bergen, Norway
| | - Diana Turcu
- Department of Biological Sciences, University of Bergen, Norway
- Department of Molecular Biology, University of Bergen, Norway
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, Sweden
| | | | - Øyvind Halskau
- Department of Biological Sciences, University of Bergen, Norway
- Department of Molecular Biology, University of Bergen, Norway
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7
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Pansieri J, Iashchishyn IA, Fakhouri H, Ostojić L, Malisauskas M, Musteikyte G, Smirnovas V, Schneider MM, Scheidt T, Xu CK, Meisl G, Knowles TPJ, Gazit E, Antoine R, Morozova-Roche LA. Templating S100A9 amyloids on Aβ fibrillar surfaces revealed by charge detection mass spectrometry, microscopy, kinetic and microfluidic analyses. Chem Sci 2020; 11:7031-7039. [PMID: 34122996 PMCID: PMC8159403 DOI: 10.1039/c9sc05905a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 06/16/2020] [Indexed: 12/16/2022] Open
Abstract
The mechanism of amyloid co-aggregation and its nucleation process are not fully understood in spite of extensive studies. Deciphering the interactions between proinflammatory S100A9 protein and Aβ42 peptide in Alzheimer's disease is fundamental since inflammation plays a central role in the disease onset. Here we use innovative charge detection mass spectrometry (CDMS) together with biophysical techniques to provide mechanistic insight into the co-aggregation process and differentiate amyloid complexes at a single particle level. Combination of mass and charge distributions of amyloids together with reconstruction of the differences between them and detailed microscopy reveals that co-aggregation involves templating of S100A9 fibrils on the surface of Aβ42 amyloids. Kinetic analysis further corroborates that the surfaces available for the Aβ42 secondary nucleation are diminished due to the coating by S100A9 amyloids, while the binding of S100A9 to Aβ42 fibrils is validated by a microfluidic assay. We demonstrate that synergy between CDMS, microscopy, kinetic and microfluidic analyses opens new directions in interdisciplinary research.
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Affiliation(s)
- Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Hussein Fakhouri
- Institut Lumière Matière, UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon F-69100 Villeurbanne France
| | - Lucija Ostojić
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Mantas Malisauskas
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Greta Musteikyte
- Institute of Biotechnology, Life Sciences Center, Vilnius University Vilnius Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University Vilnius Lithuania
| | - Matthias M Schneider
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Tom Scheidt
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Catherine K Xu
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Georg Meisl
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Tuomas P J Knowles
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Cavendish Laboratory, Department of Physics, University of Cambridge JJ Thompson Ave CB3 0HE Cambridge UK
| | - Ehud Gazit
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
- School of Molecular Cell Biology and Biotechnology, Tel Aviv University Tel Aviv 69978 Israel
| | - Rodolphe Antoine
- Institut Lumière Matière, UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon F-69100 Villeurbanne France
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8
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Pansieri J, Ostojić L, Iashchishyn IA, Magzoub M, Wallin C, Wärmländer SK, Gräslund A, Nguyen Ngoc M, Smirnovas V, Svedružić Ž, Morozova-Roche LA. Pro-Inflammatory S100A9 Protein Aggregation Promoted by NCAM1 Peptide Constructs. ACS Chem Biol 2019; 14:1410-1417. [PMID: 31194501 DOI: 10.1021/acschembio.9b00394] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Amyloid cascade and neuroinflammation are hallmarks of neurodegenerative diseases, and pro-inflammatory S100A9 protein is central to both of them. Here, we have shown that NCAM1 peptide constructs carrying polycationic sequences derived from Aβ peptide (KKLVFF) and PrP protein (KKRPKP) significantly promote the S100A9 amyloid self-assembly in a concentration-dependent manner by making transient interactions with individual S100A9 molecules, perturbing its native structure and acting as catalysts. Since the individual molecule misfolding is a rate-limiting step in S100A9 amyloid aggregation, the effects of the NCAM1 construct on the native S100A9 are so critical for its amyloid self-assembly. S100A9 rapid self-assembly into large aggregated clumps may prevent its amyloid tissue propagation, and by modulating S100A9 aggregation as a part of the amyloid cascade, the whole process may be effectively tuned.
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Affiliation(s)
- Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-901 87 Umeå, Sweden
| | - Lucija Ostojić
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-901 87 Umeå, Sweden
| | - Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-901 87 Umeå, Sweden
| | - Mazin Magzoub
- New York University Abu Dhabi, Saadiyat Island, Abu Dhabi, United Arab Emirates
| | - Cecilia Wallin
- Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, Stockholm, Sweden
| | | | - Astrid Gräslund
- Department of Biochemistry and Biophysics, Arrhenius Laboratories, Stockholm University, Stockholm, Sweden
| | - Mai Nguyen Ngoc
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Željko Svedružić
- Department of Biomedical Technology, University of Rijeka, HR 51000, Rijeka, Croatia
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9
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Wang C, Iashchishyn IA, Kara J, Foderà V, Vetri V, Sancataldo G, Marklund N, Morozova-Roche LA. Proinflammatory and amyloidogenic S100A9 induced by traumatic brain injury in mouse model. Neurosci Lett 2019; 699:199-205. [PMID: 30753908 DOI: 10.1016/j.neulet.2019.02.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/07/2019] [Accepted: 02/08/2019] [Indexed: 12/27/2022]
Abstract
Traumatic brain injury (TBI) represents a significant risk factor for development of neurodegenerative diseases such as Alzheimer's and Parkinson's. The S100A9-driven amyloid-neuroinflammatory cascade occurring during primary and secondary TBI events can serve as a mechanistic link between TBI and Alzheimer's as demonstrated recently in the human brain tissues. Here by using immunohistochemistry in the controlled cortical impact TBI mouse model we have found pro-inflammatory S100A9 in the brain tissues of all mice on the first and third post-TBI days, while 70% of mice did not show any S100A9 presence on seventh post-TBI day similar to controls. This indicates that defensive mechanisms effectively cleared S100A9 in these mouse brain tissues during post-TBI recovery. By using sequential immunohistochemistry we have shown that S100A9 was produced by both neuronal and microglial cells. However, Aβ peptide deposits characteristic for Alzheimer's disease were not detected in any post-TBI animals. On the first and third post-TBI days S100A9 was found to aggregate intracellularly into amyloid oligomers, similar to what was previously observed in human TBI tissues. Complementary, by using Rayleigh scatting, intrinsic fluorescence and atomic force microscopy we demonstrated that in vitro S100A9 self-assembles into amyloid oligomers within minutes. Its amyloid aggregation is highly dependent on changes of environmental conditions such as variation of calcium levels, pH, temperature and reduction/oxidation, which might be relevant to perturbation of cellular and tissues homeostasis under TBI. Present results demonstrate that S100A9 induction mechanisms in TBI are similar in mice and humans, emphasizing that S100A9 is an important marker of brain injury and therefore can be a potential therapeutic target.
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Affiliation(s)
- Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - John Kara
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Vito Foderà
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Valeria Vetri
- Dipartimento di Fisica e Chimica e Aten Center Universitá di Palermo, 90128 Palermo, Italy
| | - Giuseppe Sancataldo
- Dipartimento di Fisica e Chimica e Aten Center Universitá di Palermo, 90128 Palermo, Italy
| | - Niklas Marklund
- Department of Neurosurgery, Uppsala University Hospital, 751 85 Uppsala, Sweden
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10
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Wang C, Iashchishyn IA, Pansieri J, Nyström S, Klementieva O, Kara J, Horvath I, Moskalenko R, Rofougaran R, Gouras G, Kovacs GG, Shankar SK, Morozova-Roche LA. S100A9-Driven Amyloid-Neuroinflammatory Cascade in Traumatic Brain Injury as a Precursor State for Alzheimer's Disease. Sci Rep 2018; 8:12836. [PMID: 30150640 PMCID: PMC6110751 DOI: 10.1038/s41598-018-31141-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/13/2018] [Indexed: 12/22/2022] Open
Abstract
Pro-inflammatory and amyloidogenic S100A9 protein is an important contributor to Alzheimer's disease (AD) pathology. Traumatic brain injury (TBI) is viewed as a precursor state for AD. Here we have shown that S100A9-driven amyloid-neuroinflammatory cascade was initiated in TBI and may serve as a mechanistic link between TBI and AD. By analyzing the TBI and AD human brain tissues, we demonstrated that in post-TBI tissues S100A9, produced by neurons and microglia, becomes drastically abundant compared to Aβ and contributes to both precursor-plaque formation and intracellular amyloid oligomerization. Conditions implicated in TBI, such as elevated S100A9 concentration, acidification and fever, provide strong positive feedback for S100A9 nucleation-dependent amyloid formation and delay in its proteinase clearance. Consequently, both intracellular and extracellular S100A9 oligomerization correlated with TBI secondary neuronal loss. Common morphology of TBI and AD plaques indicated their similar initiation around multiple aggregation centers. Importantly, in AD and TBI we found S100A9 plaques without Aβ. S100A9 and Aβ plaque pathology was significantly advanced in AD cases with TBI history at earlier age, signifying TBI as a risk factor. These new findings highlight the detrimental consequences of prolonged post-TBI neuroinflammation, which can sustain S100A9-driven amyloid-neurodegenerative cascade as a specific mechanism leading to AD development.
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Affiliation(s)
- Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.,Department of General Chemistry, Sumy State University, Sumy, 40000, Ukraine
| | - Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Sofie Nyström
- IFM-Department of Chemistry, Linköping University, 58183, Linköping, Sweden
| | - Oxana Klementieva
- Department of Experimental Medical Sciences, Lund University, 22184, Lund, Sweden
| | - John Kara
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Istvan Horvath
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Roman Moskalenko
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.,Department of Pathology, Sumy State University, Sumy, 40000, Ukraine
| | - Reza Rofougaran
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Gunnar Gouras
- Department of Experimental Medical Sciences, Lund University, 22184, Lund, Sweden
| | - Gabor G Kovacs
- Institute of Neurology, Medical University of Vienna, 1097, Vienna, Austria
| | - S K Shankar
- Human Brain Tissue Repository, Department of Neuropathology, National Institute of Mental Health and Neurosciences, 560029, Bangalore, India
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11
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Iashchishyn IA, Gruden MA, Moskalenko RA, Davydova TV, Wang C, Sewell RDE, Morozova-Roche LA. Intranasally Administered S100A9 Amyloids Induced Cellular Stress, Amyloid Seeding, and Behavioral Impairment in Aged Mice. ACS Chem Neurosci 2018; 9:1338-1348. [PMID: 29618200 DOI: 10.1021/acschemneuro.7b00512] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Amyloid formation and neuroinflammation are major features of Alzheimer's disease pathology. Proinflammatory mediator S100A9 was shown to act as a link between the amyloid and neuroinflammatory cascades in Alzheimer's disease, leading together with Aβ to plaque formation, neuronal loss and memory impairment. In order to examine if S100A9 alone in its native and amyloid states can induce neuronal stress and memory impairment, we have administered S100A9 species intranasally to aged mice. Single and sequential immunohistochemistry and passive avoidance behavioral test were conducted to evaluate the consequences. Administered S100A9 species induced widespread cellular stress responses in cerebral structures, including frontal lobe, hippocampus and cerebellum. These were manifested by increased levels of S100A9, Bax, and to a lesser extent activated caspase-3 immunopositive cells. Upon administration of S100A9 fibrils, the amyloid oligomerization was observed in the brain tissues, which can further exacerbate cellular stress. The cellular stress responses correlated with significantly increased training and decreased retention latencies measured in the passive avoidance test for the S100A9 treated animal groups. Remarkably, the effect size in the behavioral tests was moderate already in the group treated with native S100A9, while the effect sizes were large in the groups administered S100A9 amyloid oligomers or fibrils. The findings demonstrate the brain susceptibility to neurotoxic damage of S100A9 species leading to behavioral and memory impairments. Intranasal administration of S100A9 species proved to be an effective method to study amyloid induced brain dysfunctions, and S100A9 itself may be postulated as a target to allay early stage neurodegenerative and neuroinflammatory processes.
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Affiliation(s)
- Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå SE-90187, Sweden
- Department of General Chemistry, Sumy State University, Sumy 40007, Ukraine
| | - Marina A. Gruden
- Department of Functional Neurochemistry, P. K. Anokhin Research Institute of Normal Physiology, Moscow 125315, Russia
| | - Roman A. Moskalenko
- Department of Pathology, Sumy State University, Sumy 40007, Ukraine
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå SE-90187, Sweden
| | - Tatiana V. Davydova
- Department of Neuroimmunopathology, Research Institute of General Pathology and Pathophysiology, Moscow 125315, Russia
| | - Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå SE-90187, Sweden
| | - Robert D. E. Sewell
- Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff CF10 3NB, United Kingdom
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12
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Horvath I, Iashchishyn IA, Moskalenko RA, Wang C, Wärmländer SKTS, Wallin C, Gräslund A, Kovacs GG, Morozova-Roche LA. Co-aggregation of pro-inflammatory S100A9 with α-synuclein in Parkinson's disease: ex vivo and in vitro studies. J Neuroinflammation 2018; 15:172. [PMID: 29866153 PMCID: PMC5987543 DOI: 10.1186/s12974-018-1210-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/20/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Chronic neuroinflammation is a hallmark of Parkinson's disease (PD) pathophysiology, associated with increased levels of pro-inflammatory factors in PD brain tissues. The pro-inflammatory mediator and highly amyloidogenic protein S100A9 is involved in the amyloid-neuroinflammatory cascade in Alzheimer's disease. This is the first report on the co-aggregation of α-synuclein (α-syn) and S100A9 both in vitro and ex vivo in PD brain. METHODS Single and sequential immunohistochemistry, immunofluorescence, scanning electron and atomic force (AFM) microscopies were used to analyze the ex vivo PD brain tissues for S100A9 and α-syn location and aggregation. In vitro studies revealing S100A9 and α-syn interaction and co-aggregation were conducted by NMR, circular dichroism, Thioflavin-T fluorescence, AFM, and surface plasmon resonance methods. RESULTS Co-localized and co-aggregated S100A9 and α-syn were found in 20% Lewy bodies and 77% neuronal cells in the substantia nigra; both proteins were also observed in Lewy bodies in PD frontal lobe (Braak stages 4-6). Lewy bodies were characterized by ca. 10-23 μm outer diameter, with S100A9 and α-syn being co-localized in the same lamellar structures. S100A9 was also detected in neurons and blood vessels of the aged patients without PD, but in much lesser extent. In vitro S100A9 and α-syn were shown to interact with each other via the α-syn C-terminus with an apparent dissociation constant of ca. 5 μM. Their co-aggregation occurred significantly faster and led to formation of larger amyloid aggregates than the self-assembly of individual proteins. S100A9 amyloid oligomers were more toxic than those of α-syn, while co-aggregation of both proteins mitigated the cytotoxicity of S100A9 oligomers. CONCLUSIONS We suggest that sustained neuroinflammation promoting the spread of amyloidogenic S100A9 in the brain tissues may trigger the amyloid cascade involving α-syn and S100A9 and leading to PD, similar to the effect of S100A9 and Aβ co-aggregation in Alzheimer's disease. The finding of S100A9 involvement in PD may open a new avenue for therapeutic interventions targeting S100A9 and preventing its amyloid self-assembly in affected brain tissues.
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Affiliation(s)
- Istvan Horvath
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
- Department of General Chemistry, Sumy State University, Sumy, 40007, Ukraine
| | - Roman A Moskalenko
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
- Department of Pathology, Sumy State University, Sumy, 40007, Ukraine
| | - Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | | | - Cecilia Wallin
- Department of Biochemistry and Biophysics, Stockholm University, 10691, Stockholm, Sweden
| | - Astrid Gräslund
- Department of Biochemistry and Biophysics, Stockholm University, 10691, Stockholm, Sweden
| | - Gabor G Kovacs
- Institute of Neurology, Medical University of Vienna, Vienna, Austria
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13
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Iashchishyn IA, Sulskis D, Nguyen Ngoc M, Smirnovas V, Morozova-Roche LA. Finke-Watzky Two-Step Nucleation-Autocatalysis Model of S100A9 Amyloid Formation: Protein Misfolding as "Nucleation" Event. ACS Chem Neurosci 2017; 8:2152-2158. [PMID: 28759719 DOI: 10.1021/acschemneuro.7b00251] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Quantitative kinetic analysis is critical for understanding amyloid mechanisms. Here we demonstrate the application of generic Finke-Watzky (F-W) two-step nucleation-autocatalytic growth model to the concentration-dependent amyloid kinetics of proinflammatory α-helical S100A9 protein at pH 7.4 and at 37 and 42 °C. The model is based on two pseudoelementary reaction steps applied without further analytical constraints, and its treatment of S100A9 amyloid self-assembly demonstrates that initial misfolding and β-sheet formation, defined as "nucleation" step, spontaneously takes place within individual S100A9 molecules at higher rate than the subsequent fibrillar growth. The latter, described as an autocatalytic process, will proceed if misfolded amyloid-prone S100A9 is populated on a macroscopic time scale. Short lengths of S100A9 fibrils are consistent with the F-W model. The analysis of fibrillar length distribution by the Beker-Döring model demonstrates independently that such distribution is solely determined by slow fibril growth and there is no fragmentation or secondary pathways decreasing fibrillar length.
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Affiliation(s)
- Igor A. Iashchishyn
- Department
of Medical Biochemistry and Biophysics, Umeå University, SE-901 87 Umeå, Sweden
- Department
of General Chemistry, Sumy State University, 40007 Sumy, Ukraine
| | - Darius Sulskis
- Department
of Medical Biochemistry and Biophysics, Umeå University, SE-901 87 Umeå, Sweden
- Department
of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Mai Nguyen Ngoc
- Department
of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Vytautas Smirnovas
- Department
of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, LT-10257 Vilnius, Lithuania
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14
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Horvath I, Iashchishyn IA, Forsgren L, Morozova-Roche LA. Immunochemical Detection of α-Synuclein Autoantibodies in Parkinson's Disease: Correlation between Plasma and Cerebrospinal Fluid Levels. ACS Chem Neurosci 2017; 8:1170-1176. [PMID: 28263550 DOI: 10.1021/acschemneuro.7b00063] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Autoantibodies to Parkinson's disease (PD) amyloidogenic protein, α-synuclein, were recognized as a prospective biomarker for early disease diagnostics, yet there is inconsistency in previous reports, potentially related to PD status. Therefore, plasma and cerebrospinal fluid (CSF) of the cross-sectional cohort of 60 individuals, including recently diagnosed PD patients with mild and moderate PD and age-matched controls, were examined by enzyme-linked immunosorbent assay (ELISA). Nonparametric statistics was used for data analysis. We found significantly elevated levels of α-synuclein autoantibodies in both plasma and CSF in mild PD compared to controls, followed by some decrease in moderate PD. Receiver operating characteristic and effect size analyses confirmed the diagnostic power of α-synuclein antibodies in both plasma and CSF. For the first time, we showed the correlation between plasma and CSF α-synuclein antibody levels for mild, moderate, and combined PD groups. This indicates the potentiality of α-synuclein antibodies as PD biomarker and the increased diagnostic power of their simultaneous analysis in plasma and CSF.
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Affiliation(s)
- Istvan Horvath
- Department of Medical
Biochemistry and Biophysics, Umeå University, Umeå 901 87, Sweden
| | - Igor A. Iashchishyn
- Department of Medical
Biochemistry and Biophysics, Umeå University, Umeå 901 87, Sweden
- Department of General
Chemistry, Sumy State University, Sumy 40000, Ukraine
| | - Lars Forsgren
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå 901 87, Sweden
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