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Parvin F, Haglund S, Wegenast-Braun B, Jucker M, Saito T, Saido TC, Nilsson KPR, Nilsson P, Nyström S, Hammarström P. Divergent Age-Dependent Conformational Rearrangement within Aβ Amyloid Deposits in APP23, APPPS1, and AppNL-F Mice. ACS Chem Neurosci 2024. [PMID: 38652895 DOI: 10.1021/acschemneuro.4c00104] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024] Open
Abstract
Amyloid plaques composed of fibrils of misfolded Aβ peptides are pathological hallmarks of Alzheimer's disease (AD). Aβ fibrils are polymorphic in their tertiary and quaternary molecular structures. This structural polymorphism may carry different pathologic potencies and can putatively contribute to clinical phenotypes of AD. Therefore, mapping of structural polymorphism of Aβ fibrils and structural evolution over time is valuable to understanding disease mechanisms. Here, we investigated how Aβ fibril structures in situ differ in Aβ plaque of different mouse models expressing familial mutations in the AβPP gene. We imaged frozen brains with a combination of conformation-sensitive luminescent conjugated oligothiophene (LCO) ligands and Aβ-specific antibodies. LCO fluorescence mapping revealed that mouse models APP23, APPPS1, and AppNL-F have different fibril structures within Aβ-amyloid plaques depending on the AβPP-processing genotype. Co-staining with Aβ-specific antibodies showed that individual plaques from APP23 mice expressing AβPP Swedish mutation have two distinct fibril polymorph regions of core and corona. The plaque core is predominantly composed of compact Aβ40 fibrils, and the corona region is dominated by diffusely packed Aβ40 fibrils. Conversely, the AβPP knock-in mouse AppNL-F, expressing the AβPP Iberian mutation along with Swedish mutation has tiny, cored plaques consisting mainly of compact Aβ42 fibrils, vastly different from APP23 even at elevated age up to 21 months. Age-dependent polymorph rearrangement of plaque cores observed for APP23 and APPPS1 mice >12 months, appears strongly promoted by Aβ40 and was hence minuscule in AppNL-F. These structural studies of amyloid plaques in situ can map disease-relevant fibril polymorph distributions to guide the design of diagnostic and therapeutic molecules.
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Affiliation(s)
- Farjana Parvin
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
| | - Samuel Haglund
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
| | - Bettina Wegenast-Braun
- German Center for Neurodegenerative Diseases (DZNE), University of Tübingen, 72076 Tübingen, Germany
- Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
| | - Mathias Jucker
- German Center for Neurodegenerative Diseases (DZNE), University of Tübingen, 72076 Tübingen, Germany
- Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
| | - Takashi Saito
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Wako 351-0198, Saitama, Japan
- Department of Neurocognitive Science, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Aichi, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Wako 351-0198, Saitama, Japan
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
| | - Per Nilsson
- Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 17177 Solna, Sweden
| | - Sofie Nyström
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
| | - Per Hammarström
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
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2
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Klingstedt T, Lantz L, Shirani H, Ge J, Hanrieder J, Vidal R, Ghetti B, Nilsson KPR. Thiophene-Based Ligands for Specific Assignment of Distinct Aβ Pathologies in Alzheimer's Disease. ACS Chem Neurosci 2024; 15:1581-1595. [PMID: 38523263 PMCID: PMC10995944 DOI: 10.1021/acschemneuro.4c00021] [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: 01/11/2024] [Revised: 02/12/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024] Open
Abstract
Aggregated species of amyloid-β (Aβ) are one of the pathological hallmarks in Alzheimer's disease (AD), and ligands that selectively target different Aβ deposits are of great interest. In this study, fluorescent thiophene-based ligands have been used to illustrate the features of different types of Aβ deposits found in AD brain tissue. A dual-staining protocol based on two ligands, HS-276 and LL-1, with different photophysical and binding properties, was developed and applied on brain tissue sections from patients affected by sporadic AD or familial AD associated with the PSEN1 A431E mutation. When binding to Aβ deposits, the ligands could easily be distinguished for their different fluorescence, and distinct staining patterns were revealed for these two types of AD. In sporadic AD, HS-276 consistently labeled all immunopositive Aβ plaques, whereas LL-1 mainly stained cored and neuritic Aβ deposits. In the PSEN1 A431E cases, each ligand was binding to specific types of Aβ plaques. The ligand-labeled Aβ deposits were localized in distinct cortical layers, and a laminar staining pattern could be seen. Biochemical characterization of the Aβ aggregates in the individual layers also showed that the variation of ligand binding properties was associated with certain Aβ peptide signatures. For the PSEN1 A431E cases, it was concluded that LL-1 was binding to cotton wool plaques, whereas HS-276 mainly stained diffuse Aβ deposits. Overall, our findings showed that a combination of ligands was essential to identify distinct aggregated Aβ species associated with different forms of AD.
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Affiliation(s)
- Therése Klingstedt
- Department
of Physics, Chemistry and Biology, Linköping
University, Linköping 581 83, Sweden
| | - Linda Lantz
- Department
of Physics, Chemistry and Biology, Linköping
University, Linköping 581 83, Sweden
| | - Hamid Shirani
- Department
of Physics, Chemistry and Biology, Linköping
University, Linköping 581 83, Sweden
| | - Junyue Ge
- Department
of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology,
The Sahlgrenska Academy, University of Gothenburg,
Mölndal Hospital, Mölndal 431 80, Sweden
| | - Jörg Hanrieder
- Department
of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology,
The Sahlgrenska Academy, University of Gothenburg,
Mölndal Hospital, Mölndal 431 80, Sweden
- Department
of Neurodegenerative Diseases, University
College London Institute of Neurology, Queen Square, London WC1N 3BG, United
Kingdom
| | - Ruben Vidal
- Department
of Pathology and Laboratory Medicine, Indiana
University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Bernardino Ghetti
- Department
of Pathology and Laboratory Medicine, Indiana
University School of Medicine, Indianapolis, Indiana 46202, United States
| | - K. Peter R. Nilsson
- Department
of Physics, Chemistry and Biology, Linköping
University, Linköping 581 83, Sweden
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3
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Elovsson G, Klingstedt T, Brown M, Nilsson KPR, Brorsson AC. A Novel Drosophila Model of Alzheimer's Disease to Study Aβ Proteotoxicity in the Digestive Tract. Int J Mol Sci 2024; 25:2105. [PMID: 38396782 PMCID: PMC10888607 DOI: 10.3390/ijms25042105] [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: 12/05/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Amyloid-β (Aβ) proteotoxicity is associated with Alzheimer's disease (AD) and is caused by protein aggregation, resulting in neuronal damage in the brain. In the search for novel treatments, Drosophila melanogaster has been extensively used to screen for anti-Aβ proteotoxic agents in studies where toxic Aβ peptides are expressed in the fly brain. Since drug molecules often are administered orally there is a risk that they fail to reach the brain, due to their inability to cross the brain barrier. To circumvent this problem, we have designed a novel Drosophila model that expresses the Aβ peptides in the digestive tract. In addition, a built-in apoptotic sensor provides a fluorescent signal from the green fluorescent protein as a response to caspase activity. We found that expressing different variants of Aβ1-42 resulted in proteotoxic phenotypes such as reduced longevity, aggregate deposition, and the presence of apoptotic cells. Taken together, this gut-based Aβ-expressing fly model can be used to study the mechanisms behind Aβ proteotoxicity and to identify different substances that can modify Aβ proteotoxicity.
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Affiliation(s)
| | | | | | | | - Ann-Christin Brorsson
- Department of Physics, Chemistry, and Biology, Linköping University, 581 83 Linköping, Sweden; (G.E.); (T.K.); (M.B.); (K.P.R.N.)
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4
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Calvo-Rodriguez M, Kharitonova EK, Snyder AC, Hou SS, Sanchez-Mico MV, Das S, Fan Z, Shirani H, Nilsson KPR, Serrano-Pozo A, Bacskai BJ. Real-time imaging of mitochondrial redox reveals increased mitochondrial oxidative stress associated with amyloid β aggregates in vivo in a mouse model of Alzheimer's disease. Mol Neurodegener 2024; 19:6. [PMID: 38238819 PMCID: PMC10797952 DOI: 10.1186/s13024-024-00702-2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 01/05/2024] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Reactive oxidative stress is a critical player in the amyloid beta (Aβ) toxicity that contributes to neurodegeneration in Alzheimer's disease (AD). Damaged mitochondria are one of the main sources of reactive oxygen species and accumulate in Aβ plaque-associated dystrophic neurites in the AD brain. Although Aβ causes neuronal mitochondria reactive oxidative stress in vitro, this has never been directly observed in vivo in the living mouse brain. Here, we tested for the first time whether Aβ plaques and soluble Aβ oligomers induce mitochondrial oxidative stress in surrounding neurons in vivo, and whether this neurotoxic effect can be abrogated using mitochondrial-targeted antioxidants. METHODS We expressed a genetically encoded fluorescent ratiometric mitochondria-targeted reporter of oxidative stress in mouse models of the disease and performed intravital multiphoton microscopy of neuronal mitochondria and Aβ plaques. RESULTS For the first time, we demonstrated by direct observation in the living mouse brain exacerbated mitochondrial oxidative stress in neurons after both Aβ plaque deposition and direct application of soluble oligomeric Aβ onto the brain, and determined the most likely pathological sequence of events leading to oxidative stress in vivo. Oxidative stress could be inhibited by both blocking calcium influx into mitochondria and treating with the mitochondria-targeted antioxidant SS31. Remarkably, the latter ameliorated plaque-associated dystrophic neurites without impacting Aβ plaque burden. CONCLUSIONS Considering these results, combination of mitochondria-targeted compounds with other anti-amyloid beta or anti-tau therapies hold promise as neuroprotective drugs for the prevention and/or treatment of AD.
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Affiliation(s)
- Maria Calvo-Rodriguez
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
- Present address: Foundational Neuroscience Center, AbbVie Inc, Cambridge, MA, USA
| | - Elizabeth K Kharitonova
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Austin C Snyder
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Steven S Hou
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Maria Virtudes Sanchez-Mico
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Sudeshna Das
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Zhanyun Fan
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Alberto Serrano-Pozo
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA
| | - Brian J Bacskai
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16Th St, Charlestown, MA, 02129, USA.
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5
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Nuñez-Diaz C, Andersson E, Schultz N, Pocevičiūtė D, Hansson O, Nilsson KPR, Wennström M. The fluorescent ligand bTVBT2 reveals increased p-tau uptake by retinal microglia in Alzheimer's disease patients and App NL-F/NL-F mice. Alzheimers Res Ther 2024; 16:4. [PMID: 38167557 PMCID: PMC10763304 DOI: 10.1186/s13195-023-01375-7] [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: 07/16/2023] [Accepted: 12/24/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Amyloid beta (Aβ) deposits and hyperphosphorylated tau (p-tau) accumulation have been identified in the retina of Alzheimer's disease (AD) patients and transgenic AD mice. Previous studies have shown that retinal microglia engulf Aβ, but this property decreases in AD patients. Whether retinal microglia also take up p-tau and if this event is affected in AD is yet not described. In the current study, we use the p-tau-specific thiophene-based ligand bTVBT2 to investigate the relationship between disease progression and p-tau uptake by microglia in the retina of AD patients and AppNL-F/NL-F knock-in mice, an AD mouse model known to demonstrate extracellular Aβ plaques and dystrophic neurites in the brain from 6 months of age. METHODS Evaluation of bTVBT2 specificity and its presence within microglia was assessed by immunofluorescent staining of hippocampal sections and flat-mount retina samples from non-demented controls, AD patients, 3-, 9-, and 12-month-old AppNL-F/NL-F knock-in mice and 12- and 18-month-old wild type (WT) mice. We used ImageJ to analyze the amount of bTVBT2 inside Iba1-positive microglia. Co-localization between the ligand and p-tau variant Ser396/Ser404 (PHF-1), Aβ, phosphorylated TAR DNA binding protein 43 (pTDP-43), and islet amyloid polypeptide (IAPP) in the brain and retina was analyzed using confocal imaging. RESULTS Confocal imaging analysis showed that bTVBT2 binds to PHF-1- and AT8-positive aggregates inside retinal microglia, and not to Aβ, pTDP-43, or IAPP. The density of bTVBT2-positive microglia was higher in cases with a high Aβ load compared to those with a low Aβ load. This density correlated with the neurofibrillary tangle load in the brain, but not with retinal levels of high molecular weight (aggregated) Aβ40 or Aβ42. Analysis of AppNL-F/NL-F knock-in mouse retina further showed that 50% of microglia in 3-month-old AppNL-F/NL-F knock-in mice contained bTVBT2. The percentage significantly increased in 9- and 12-month-old mice. CONCLUSION Our study suggests that the microglial capability to uptake p-tau in the retina persists and intensifies with AD progression. These results also highlight bTVBT2 as a ligand of interest in future monitoring of retinal AD pathology.
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Affiliation(s)
- Cristina Nuñez-Diaz
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Emelie Andersson
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Nina Schultz
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Dovilė Pocevičiūtė
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Oskar Hansson
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
- Memory Clinic, Skåne University Hospital, Malmö, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology IFM, Linköping University, 581 83, Linköping, Sweden
| | - Malin Wennström
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden.
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6
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Björk L, Shirani H, Todarwal Y, Linares M, Vidal R, Ghetti B, Norman P, Klingstedt T, Nilsson KPR. Distinct Heterocyclic Moieties Govern the Selectivity of Thiophene-Vinylene-Based Ligands Towards Aβ or Tau Pathology in Alzheime's Disease. European J Org Chem 2023; 26:e202300583. [PMID: 38585413 PMCID: PMC10997339 DOI: 10.1002/ejoc.202300583] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Indexed: 04/09/2024]
Abstract
Distinct aggregated proteins are correlated with numerous neurodegenerative diseases and the development of ligands that selectively detect these pathological hallmarks is vital. Recently, the synthesis of thiophene-based optical ligands, denoted bi-thiophene-vinyl-benzothiazoles (bTVBTs), that could be utilized for selective assignment of tau pathology in brain tissue with Alzheime's disease (AD) pathology, was reported. Herein, we investigate the ability of these ligands to selectively distinguish tau deposits from aggregated amyloid-β (Aβ), the second AD associated pathological hallmark, when replacing the terminal thiophene moiety with other heterocyclic motifs. The selectivity for tau pathology was reduced when introducing specific heterocyclic motifs, verifying that specific molecular interactions between the ligands and the aggregates are necessary for selective detection of tau deposits. In addition, ligands having certain heterocyclic moieties attached to the central thiophene-vinylene building block displayed selectivity to aggregated Aβ pathology. Our findings provide chemical insights for the development of ligands that can distinguish between aggregated proteinaceous species consisting of different proteins and might also aid in creating novel agents for clinical imaging of tau pathology in AD.
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Affiliation(s)
- Linnea Björk
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Yogesh Todarwal
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Mathieu Linares
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Ruben Vidal
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, 46202 Indiana, USA
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, 46202 Indiana, USA
| | - Patrick Norman
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
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7
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Ilkhanizadeh S, Gracias A, Åslund AK, Bäck M, Simon R, Kavanagh E, Migliori B, Neofytou C, Nelander S, Westermark B, Uhrbom L, Forsberg-Nilsson K, Konradsson P, Teixeira AI, Uhlén P, Joseph B, Hermanson O, Nilsson KPR. Live Detection of Neural Progenitors and Glioblastoma Cells by an Oligothiophene Derivative. ACS Appl Bio Mater 2023; 6:3790-3797. [PMID: 37647213 PMCID: PMC10521023 DOI: 10.1021/acsabm.3c00447] [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: 06/21/2023] [Accepted: 08/10/2023] [Indexed: 09/01/2023]
Abstract
There is an urgent need for simple and non-invasive identification of live neural stem/progenitor cells (NSPCs) in the developing and adult brain as well as in disease, such as in brain tumors, due to the potential clinical importance in prognosis, diagnosis, and treatment of diseases of the nervous system. Here, we report a luminescent conjugated oligothiophene (LCO), named p-HTMI, for non-invasive and non-amplified real-time detection of live human patient-derived glioblastoma (GBM) stem cell-like cells and NSPCs. While p-HTMI stained only a small fraction of other cell types investigated, the mere addition of p-HTMI to the cell culture resulted in efficient detection of NSPCs or GBM cells from rodents and humans within minutes. p-HTMI is functionalized with a methylated imidazole moiety resembling the side chain of histidine/histamine, and non-methylated analogues were not functional. Cell sorting experiments of human GBM cells demonstrated that p-HTMI labeled the same cell population as CD271, a proposed marker for stem cell-like cells and rapidly migrating cells in glioblastoma. Our results suggest that the LCO p-HTMI is a versatile tool for immediate and selective detection of neural and glioma stem and progenitor cells.
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Affiliation(s)
| | - Aileen Gracias
- Department
of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Andreas K.O. Åslund
- IFM,
Department of Chemistry, Linköping
University, Linköping 581 83, Sweden
| | - Marcus Bäck
- IFM,
Department of Chemistry, Linköping
University, Linköping 581 83, Sweden
| | - Rozalyn Simon
- IFM,
Department of Chemistry, Linköping
University, Linköping 581 83, Sweden
| | - Edel Kavanagh
- Institute
of Environmental Medicine, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Bianca Migliori
- Department
of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Christina Neofytou
- Department
of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Sven Nelander
- Department
of Immunology, Genetics and Pathology, and Science for Life Laboratory,
Rudbeck Laboratory, Uppsala University, Uppsala 751 85, Sweden
| | - Bengt Westermark
- Department
of Immunology, Genetics and Pathology, and Science for Life Laboratory,
Rudbeck Laboratory, Uppsala University, Uppsala 751 85, Sweden
| | - Lene Uhrbom
- Department
of Immunology, Genetics and Pathology, and Science for Life Laboratory,
Rudbeck Laboratory, Uppsala University, Uppsala 751 85, Sweden
| | - Karin Forsberg-Nilsson
- Department
of Immunology, Genetics and Pathology, and Science for Life Laboratory,
Rudbeck Laboratory, Uppsala University, Uppsala 751 85, Sweden
| | - Peter Konradsson
- IFM,
Department of Chemistry, Linköping
University, Linköping 581 83, Sweden
| | - Ana I. Teixeira
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Per Uhlén
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Bertrand Joseph
- Institute
of Environmental Medicine, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Ola Hermanson
- Department
of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden
| | - K. Peter R. Nilsson
- IFM,
Department of Chemistry, Linköping
University, Linköping 581 83, Sweden
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8
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Aguilar-Calvo P, Malik A, Sandoval DR, Barback C, Orrù CD, Standke HG, Thomas OR, Dwyer CA, Pizzo DP, Bapat J, Soldau K, Ogawa R, Riley MB, Nilsson KPR, Kraus A, Caughey B, Iliff JJ, Vera DR, Esko JD, Sigurdson CJ. Neuronal Ndst1 depletion accelerates prion protein clearance and slows neurodegeneration in prion infection. PLoS Pathog 2023; 19:e1011487. [PMID: 37747931 PMCID: PMC10586673 DOI: 10.1371/journal.ppat.1011487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 10/19/2023] [Accepted: 08/11/2023] [Indexed: 09/27/2023] Open
Abstract
Select prion diseases are characterized by widespread cerebral plaque-like deposits of amyloid fibrils enriched in heparan sulfate (HS), a abundant extracellular matrix component. HS facilitates fibril formation in vitro, yet how HS impacts fibrillar plaque growth within the brain is unclear. Here we found that prion-bound HS chains are highly sulfated, and that the sulfation is essential for accelerating prion conversion in vitro. Using conditional knockout mice to deplete the HS sulfation enzyme, Ndst1 (N-deacetylase / N-sulfotransferase) from neurons or astrocytes, we investigated how reducing HS sulfation impacts survival and prion aggregate distribution during a prion infection. Neuronal Ndst1-depleted mice survived longer and showed fewer and smaller parenchymal plaques, shorter fibrils, and increased vascular amyloid, consistent with enhanced aggregate transit toward perivascular drainage channels. The prolonged survival was strain-dependent, affecting mice infected with extracellular, plaque-forming, but not membrane bound, prions. Live PET imaging revealed rapid clearance of recombinant prion protein monomers into the CSF of neuronal Ndst1- deficient mice, neuronal, further suggesting that HS sulfate groups hinder transit of extracellular prion protein monomers. Our results directly show how a host cofactor slows the spread of prion protein through the extracellular space and identify an enzyme to target to facilitate aggregate clearance.
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Affiliation(s)
| | - Adela Malik
- Department of Pathology, UC San Diego, La Jolla, California, United States of America
| | - Daniel R. Sandoval
- Department of Cellular and Molecular Medicine, UC San Diego, La Jolla, California, United States of America
| | - Christopher Barback
- Department of Radiology, UC San Diego, La Jolla, California, United States of America
| | - Christina D. Orrù
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, Montana, United States of America
| | - Heidi G. Standke
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Olivia R. Thomas
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Chrissa A. Dwyer
- Department of Cellular and Molecular Medicine, UC San Diego, La Jolla, California, United States of America
| | - Donald P. Pizzo
- Department of Pathology, UC San Diego, La Jolla, California, United States of America
| | - Jaidev Bapat
- Department of Pathology, UC San Diego, La Jolla, California, United States of America
| | - Katrin Soldau
- Department of Pathology, UC San Diego, La Jolla, California, United States of America
| | - Ryotaro Ogawa
- Department of Radiology, UC San Diego, La Jolla, California, United States of America
| | - Mckenzie B. Riley
- Department of Neurology, University of Alabama, Birmingham, Alabama, United States of America
| | - K. Peter R. Nilsson
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - Allison Kraus
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Byron Caughey
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, Montana, United States of America
| | - Jeffrey J. Iliff
- VISN 20 NW Mental Illness Research, Education and Clinical Center, VA Puget Sound Health Care System, Seattle, Washington, United States of America
- Department of Psychiatry and Behavioral Science, Department of Neurology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - David R. Vera
- Department of Radiology, UC San Diego, La Jolla, California, United States of America
| | - Jeffrey D. Esko
- Department of Cellular and Molecular Medicine, UC San Diego, La Jolla, California, United States of America
| | - Christina J. Sigurdson
- Department of Pathology, UC San Diego, La Jolla, California, United States of America
- Department of Medicine, UC San Diego, La Jolla, California, United States of America
- Department of Pathology, Microbiology, and Immunology, UC Davis, Davis, California, United States of America
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9
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Schweighauser M, Garringer HJ, Klingstedt T, Nilsson KPR, Masuda-Suzukake M, Murrell JR, Risacher SL, Vidal R, Scheres SHW, Goedert M, Ghetti B, Newell KL. Mutation ∆K281 in MAPT causes Pick's disease. Acta Neuropathol 2023; 146:211-226. [PMID: 37351604 PMCID: PMC10329087 DOI: 10.1007/s00401-023-02598-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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: 05/17/2023] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 06/24/2023]
Abstract
Two siblings with deletion mutation ∆K281 in MAPT developed frontotemporal dementia. At autopsy, numerous inclusions of hyperphosphorylated 3R Tau were present in neurons and glial cells of neocortex and some subcortical regions, including hippocampus, caudate/putamen and globus pallidus. The inclusions were argyrophilic with Bodian silver, but not with Gallyas-Braak silver. They were not labelled by an antibody specific for tau phosphorylated at S262 and/or S356. The inclusions were stained by luminescent conjugated oligothiophene HS-84, but not by bTVBT4. Electron cryo-microscopy revealed that the core of tau filaments was made of residues K254-F378 of 3R Tau and was indistinguishable from that of Pick's disease. We conclude that MAPT mutation ∆K281 causes Pick's disease.
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Affiliation(s)
| | - Holly J Garringer
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Therése Klingstedt
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
- Department of Physics, Chemistry and Biology, Lingköping University, Lingköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Lingköping University, Lingköping, Sweden
| | - Masami Masuda-Suzukake
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
- Department of Brain and Neuroscience, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Jill R Murrell
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Pathology and Laboratory Medicine, Children's Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Shannon L Risacher
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Ruben Vidal
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sjors H W Scheres
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.
| | - Michel Goedert
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
| | - Kathy L Newell
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
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10
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Gomez-Gutierrez R, Ghosh U, Yau WM, Gamez N, Do K, Kramm C, Shirani H, Vegas-Gomez L, Schulz J, Moreno-Gonzalez I, Gutierrez A, Nilsson KPR, Tycko R, Soto C, Morales R. Two structurally defined Aβ polymorphs promote different pathological changes in susceptible mice. EMBO Rep 2023:e57003. [PMID: 37424505 PMCID: PMC10398671 DOI: 10.15252/embr.202357003] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 07/11/2023] Open
Abstract
Misfolded Aβ is involved in the progression of Alzheimer's disease (AD). However, the role of its polymorphic variants or conformational strains in AD pathogenesis is not fully understood. Here, we study the seeding properties of two structurally defined synthetic misfolded Aβ strains (termed 2F and 3F) using in vitro and in vivo assays. We show that 2F and 3F strains differ in their biochemical properties, including resistance to proteolysis, binding to strain-specific dyes, and in vitro seeding. Injection of these strains into a transgenic mouse model produces different pathological features, namely different rates of aggregation, formation of different plaque types, tropism to specific brain regions, differential recruitment of Aβ40 /Aβ42 peptides, and induction of microglial and astroglial responses. Importantly, the aggregates induced by 2F and 3F are structurally different as determined by ssNMR. Our study analyzes the biological properties of purified Aβ polymorphs that have been characterized at the atomic resolution level and provides relevant information on the pathological significance of misfolded Aβ strains.
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Grants
- AARGD-18-566576 Alzheimer's Association (AA)
- PI21/00915 European Union
- P18-RT-2233 Consejería de Economía, Conocimiento, Empresas y Universidad, Junta de Andalucía (Ministry of Economy, Knowledge, Business and University, Andalusia)
- UMA18-FEDERJA-211 Consejería de Economía, Innovación, Ciencia y Empleo, Junta de Andalucía (Ministry of Economy, Innovation, Science and Employment, Government of Andalucia)
- PI21/00915 MEC | Instituto de Salud Carlos III (ISCIII)
- R56AG061878 National Institutes of Health (USA)
- RF1AG059321 National Institutes of Health (USA)
- Z01-DK029061-14 National Institutes of Health (USA)
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Affiliation(s)
- Ruben Gomez-Gutierrez
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Ujjayini Ghosh
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Wai-Ming Yau
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Nazaret Gamez
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Katherine Do
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Carlos Kramm
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Laura Vegas-Gomez
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Jonathan Schulz
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Ines Moreno-Gonzalez
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
- Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O'Higgins, Santiago, Chile
| | - Antonia Gutierrez
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Robert Tycko
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Claudio Soto
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Rodrigo Morales
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA
- Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O'Higgins, Santiago, Chile
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11
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Lantz L, Shirani H, Ghetti B, Vidal R, Klingstedt T, Nilsson KPR. Thiophene-Based Ligands for Histological Multiplex Spectral Detection of Distinct Protein Aggregates in Alzheimer's Disease. Chemistry 2023; 29:e202203568. [PMID: 36645413 PMCID: PMC10101888 DOI: 10.1002/chem.202203568] [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: 11/16/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/17/2023]
Abstract
The aggregation and accumulation of proteins in the brain is the defining feature of many devastating neurodegenerative diseases. The development of fluorescent ligands that bind to these accumulations, or deposits, is essential for the characterization of these neuropathological lesions. We report the synthesis of donor-acceptor-donor (D-A-D) thiophene-based ligands with different emission properties. The D-A-D ligands displayed selectivity towards distinct disease-associated protein deposits in histological sections from postmortem brain tissue of individuals affected by Alzheimer's disease (AD). The ability of the ligands to selectively identify AD-associated pathological alterations, such as deposits composed of aggregates of the amyloid-β (Aβ) peptide or tau, was reduced when the chemical composition of the ligands was altered. When combining the D-A-D ligands with conventional thiophene-based ligands, superior spectral separation of distinct protein aggregates in AD tissue sections was obtained. Our findings provide the structural and functional basis for the development of new fluorescent ligands that can distinguish between aggregated proteinaceous species, as well as offer novel strategies for developing multiplex fluorescence detection of protein aggregates in tissue sections.
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Affiliation(s)
- Linda Lantz
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, 46202, Indiana, USA
| | - Ruben Vidal
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, 46202, Indiana, USA
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
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12
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Sulheim E, WiderØe M, Bäck M, Nilsson KPR, Hammarström P, Nilsson LN, Davies CDL, Åslund AK. Contrast Enhanced Magnetic Resonance Imaging of Amyloid-β Plaques in a Murine Alzheimer’s Disease Model. J Alzheimers Dis 2023; 93:411-419. [PMID: 37038807 DOI: 10.3233/jad-220198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Background: Early detection of amyloid-β (Aβ) aggregates is a critical step to improve the treatment of Alzheimer’s disease (AD) because neuronal damage by the Aβ aggregates occurs before clinical symptoms are apparent. We have previously shown that luminescent conjugated oligothiophenes (LCOs), which are highly specific towards protein aggregates of Aβ, can be used to fluorescently label amyloid plaque in living rodents. Objective: We hypothesize that the LCO can be used to target gadolinium to the amyloid plaque and hence make the plaque detectable by T1-weighted magnetic resonance imaging (MRI). Methods: A novel LCO-gadolinium construct was synthesized to selectively bind to Aβ plaques and give contrast in conventional T1-weighted MR images after intravenous injection in Tg-APPSwe mice. Results: We found that mice with high plaque-burden could be identified using the LCO-Gd constructs by conventional MRI. Conclusion: Our study shows that MR imaging of amyloid plaques is challenging but feasible, and hence contrast-mediated MR imaging could be a valuable tool for early AD detection.
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Affiliation(s)
- Einar Sulheim
- Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Biotechnology and Nanomedicine, SINTEF AS, Trondheim, Norway
| | - Marius WiderØe
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
| | - Marcus Bäck
- Department of Physics, Chemistry and Biology, Division of Chemistry, Linköping University, Linköping, Sweden
| | - K. Peter R. Nilsson
- Department of Physics, Chemistry and Biology, Division of Chemistry, Linköping University, Linköping, Sweden
| | - Per Hammarström
- Department of Physics, Chemistry and Biology, Division of Chemistry, Linköping University, Linköping, Sweden
| | - Lars N.G. Nilsson
- Department of Pharmacology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | | | - Andreas K.O. Åslund
- Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Biotechnology and Nanomedicine, SINTEF AS, Trondheim, Norway
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13
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Lerouge F, Ong E, Rositi H, Mpambani F, Berner LP, Bolbos R, Olivier C, Peyrin F, Apputukan VK, Monnereau C, Andraud C, Chaput F, Berthezène Y, Braun B, Jucker M, Åslund AK, Nyström S, Hammarström P, R Nilsson KP, Lindgren M, Wiart M, Chauveau F, Parola S. In vivo targeting and multimodal imaging of cerebral amyloid-β aggregates using hybrid GdF 3 nanoparticles. Nanomedicine (Lond) 2023; 17:2173-2187. [PMID: 36927004 DOI: 10.2217/nnm-2022-0252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 03/18/2023] Open
Abstract
Aim: To propose a new multimodal imaging agent targeting amyloid-β (Aβ) plaques in Alzheimer's disease. Materials & methods: A new generation of hybrid contrast agents, based on gadolinium fluoride nanoparticles grafted with a pentameric luminescent-conjugated polythiophene, was designed, extensively characterized and evaluated in animal models of Alzheimer's disease through MRI, two-photon microscopy and synchrotron x-ray phase-contrast imaging. Results & conclusion: Two different grafting densities of luminescent-conjugated polythiophene were achieved while preserving colloidal stability and fluorescent properties, and without affecting biodistribution. In vivo brain uptake was dependent on the blood-brain barrier status. Nevertheless, multimodal imaging showed successful Aβ targeting in both transgenic mice and Aβ fibril-injected rats.
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Affiliation(s)
- Frédéric Lerouge
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Elodie Ong
- University of Lyon, Lyon Neuroscience Research Center, CNRS UMR, 5292, INSERM U1028, University of Lyon 1, Lyon, France
| | - Hugo Rositi
- University of Clermont Auvergne, Clermont Auvergne INP, Institut Pascal, CNRS UMR, 6602, Clermont-Ferrand, France
| | - Francis Mpambani
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Lise-Prune Berner
- University of Lyon, CREATIS, INSA-Lyon, University of Lyon 1, CNRS UMR, 5220, INSERM U1206, Villeurbanne, France
| | | | - Cécile Olivier
- University of Lyon, CREATIS, INSA-Lyon, University of Lyon 1, CNRS UMR, 5220, INSERM U1206, Villeurbanne, France
| | - Françoise Peyrin
- University of Lyon, CREATIS, INSA-Lyon, University of Lyon 1, CNRS UMR, 5220, INSERM U1206, Villeurbanne, France
| | - Vinu K Apputukan
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Cyrille Monnereau
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Chantal Andraud
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Frederic Chaput
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
| | - Yves Berthezène
- University of Lyon, CREATIS, INSA-Lyon, University of Lyon 1, CNRS UMR, 5220, INSERM U1206, Villeurbanne, France
| | - Bettina Braun
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University Tübingen, Tübingen, Germany
| | - Mathias Jucker
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University Tübingen, Tübingen, Germany
| | - Andreas Ko Åslund
- Department of Physics, Chemistry, & Biology, Linköping University, Linköping, Sweden
| | - Sofie Nyström
- Department of Physics, Chemistry, & Biology, Linköping University, Linköping, Sweden
| | - Per Hammarström
- Department of Physics, Chemistry, & Biology, Linköping University, Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry, & Biology, Linköping University, Linköping, Sweden
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science & Technology, Trondheim, Norway
| | - Marlène Wiart
- University of Lyon, CarMeN laboratory, INSERM U1060, INRA, U1397, University of Lyon 1, INSA-Lyon, Oullins, France.,CNRS, Villeurbanne, France
| | - Fabien Chauveau
- University of Lyon, Lyon Neuroscience Research Center, CNRS UMR, 5292, INSERM U1028, University of Lyon 1, Lyon, France
| | - Stephane Parola
- University of Lyon, École Normale Supérieure de Lyon, Laboratoire de Chimie, University of Lyon 1, CNRS UMR, 5182, Lyon, France
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14
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Caesar I, Nilsson KPR, Hammarstrom P, Lindgren M, Prokop S, Heppner FL, Schmeidler J, Haroutunian V, Holtzman DM, Hof PR, Gandy S. ApoE Alzheimer's Disease Aβ-amyloid plaque morphology varies according to APOE isotype. Res Sq 2023:rs.3.rs-2524641. [PMID: 36798327 PMCID: PMC9934766 DOI: 10.21203/rs.3.rs-2524641/v1] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Background The apolipoprotein E (APOE, gene; apoE, protein) ε4 allele is the most common identified genetic risk factor for typical late-onset sporadic Alzheimer's disease (AD). Each APOE ε4 allele roughly triples the relative risk for AD compared to that of the reference allele, APOE ε3. Methods We have employed hyperspectral fluorescence imaging with an amyloidspecific, conformation-sensing probe, p-FTAA, to elucidate protein aggregate structure and morphology in fresh frozen prefrontal cortex samples from human postmortem AD brain tissue samples from patients homozygous for either APOE ε3 or APOE ε4. Results As expected APOE ε4/ε4 tissues had significantly larger load of CAA than APOE ε3/ε3. APOE isoform-dependent morphological differences in amyloid plaques were also observed. Amyloid plaques in APOE ε3/ε3 tissue had small spherical cores and large corona while amyloid plaques in APOE ε4/ε4 tissues had large irregular and multilobulated plaques with relatively smaller corona. Despite the different morphologies of their cores, the p-FTAA stained APOE ε3/ε3 amyloid plaque cores had spectral properties identical to those of APOE ε4/ε4 plaque cores. Conclusions These data support the hypothesis that one mechanism by which the APOE ε4 allele affects AD is by modulating the macrostructure of pathological protein deposits in brain. APOE ε4 is associated with a higher density of amyloid plaques (as compared to APOE ε3). We speculate that multilobulated APOE ε4-associated plaques arise from multiple initiation foci that coalesce as the plaques grow.
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Affiliation(s)
| | | | | | - Mikael Lindgren
- Norwegian University of Science and Technology: Norges teknisk-naturvitenskapelige universitet
| | | | - Frank L Heppner
- Charite Universitatsmedizin Berlin Campus Charite Mitte: Charite Universitatsmedizin Berlin
| | | | | | - David M Holtzman
- Washington University In Saint Louis: Washington University in St Louis
| | | | - Sam Gandy
- Icahn School of Medicine at Mount Sinai
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15
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Arja K, Selegård R, Paloncýová M, Linares M, Lindgren M, Norman P, Aili D, Nilsson KPR. Self-Assembly of Chiro-Optical Materials from Nonchiral Oligothiophene-Porphyrin Derivatives and Random Coil Synthetic Peptides. Chempluschem 2023; 88:e202200262. [PMID: 36173143 DOI: 10.1002/cplu.202200262] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/01/2022] [Indexed: 01/04/2023]
Abstract
Biomimetic chiral optoelectronic materials can be utilized in electronic devices, biosensors and artificial enzymes. Herein, this work reports the chiro-optical properties and architectural arrangement of optoelectronic materials generated from self-assembly of initially nonchiral oligothiophene-porphyrin derivatives and random coil synthetic peptides. The photo-physical- and structural properties of the materials were assessed by absorption-, fluorescence- and circular dichroism spectroscopy, as well as dynamic light scattering, scanning electron microscopy and theoretical calculations. The materials display a three-dimensional ordered helical structure and optical activity that are observed due to an induced chirality of the optoelectronic element upon interaction with the peptide. Both these properties are influenced by the chemical composition of the oligothiophene-porphyrin derivative, as well as the peptide sequence. We foresee that our findings will aid in developing self-assembled optoelectronic materials with dynamic architectonical accuracies, as well as offer the possibility to generate the next generation of materials for a variety of bioelectronic applications.
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Affiliation(s)
- Katriann Arja
- Division of Chemistry Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Robert Selegård
- Laboratory of Molecular Materials Division of Biophysics and Bioengineering Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Markéta Paloncýová
- Division of Theoretical Chemistry and Biology School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 779 00, Olomouc, Czech Republic
| | - Mathieu Linares
- Laboratory of Organic Electronics and Group of Scientific Visualization Department of Science and Technology (ITN), Linköping University, 601 74, Norrköping, Sweden
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science and Technology, 7491, Trondheim, Norway
| | - Patrick Norman
- Division of Theoretical Chemistry and Biology School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Daniel Aili
- Laboratory of Molecular Materials Division of Biophysics and Bioengineering Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - K Peter R Nilsson
- Division of Chemistry Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
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16
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Arja K, Selegård R, Paloncýová M, Linares M, Lindgren M, Norman P, Aili D, Nilsson KPR. Self‐Assembly of Chiro‐Optical Materials from Nonchiral Oligothiophene‐Porphyrin Derivatives and Random Coil Synthetic Peptides. Chempluschem 2022. [DOI: 10.1002/cplu.202200402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Katriann Arja
- Division of Chemistry Department of Physics, Chemistry and Biology Linköping University 581 83 Linköping Sweden
| | - Robert Selegård
- Laboratory of Molecular Materials Division of Biophysics and Bioengineering Department of Physics, Chemistry and Biology Linköping University 581 83 Linköping Sweden
| | - Markéta Paloncýová
- Division of Theoretical Chemistry and Biology School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology 106 91 Stockholm Sweden
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute (CATRIN) Palacký University Olomouc 779 00 Olomouc Czech Republic
| | - Mathieu Linares
- Laboratory of Organic Electronics and Group of Scientific Visualization Department of Science and Technology (ITN) Linköping University 601 74 Norrköping Sweden
| | - Mikael Lindgren
- Department of Physics Norwegian University of Science and Technology 7491 Trondheim Norway
| | - Patrick Norman
- Division of Theoretical Chemistry and Biology School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology 106 91 Stockholm Sweden
| | - Daniel Aili
- Laboratory of Molecular Materials Division of Biophysics and Bioengineering Department of Physics, Chemistry and Biology Linköping University 581 83 Linköping Sweden
| | - K. Peter R. Nilsson
- Division of Chemistry Department of Physics, Chemistry and Biology Linköping University 581 83 Linköping Sweden
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17
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Kirschenbaum D, Dadgar‐Kiani E, Catto F, Voigt FF, Trevisan C, Bichsel O, Shirani H, Nilsson KPR, Frontzek KJ, Paganetti P, Helmchen F, Lee JH, Aguzzi A. Whole-brain microscopy reveals distinct temporal and spatial efficacy of anti-Aβ therapies. EMBO Mol Med 2022; 15:e16789. [PMID: 36382364 PMCID: PMC9832821 DOI: 10.15252/emmm.202216789] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 08/24/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 11/18/2022] Open
Abstract
Many efforts targeting amyloid-β (Aβ) plaques for the treatment of Alzheimer's Disease thus far have resulted in failures during clinical trials. Regional and temporal heterogeneity of efficacy and dependence on plaque maturity may have contributed to these disappointing outcomes. In this study, we mapped the regional and temporal specificity of various anti-Aβ treatments through high-resolution light-sheet imaging of electrophoretically cleared brains. We assessed the effect on amyloid plaque formation and growth in Thy1-APP/PS1 mice subjected to β-secretase inhibitors, polythiophenes, or anti-Aβ antibodies. Each treatment showed unique spatiotemporal Aβ clearance, with polythiophenes emerging as a potent anti-Aβ compound. Furthermore, aligning with a spatial-transcriptomic atlas revealed transcripts that correlate with the efficacy of each Aβ therapy. As observed in this study, there is a striking dependence of specific treatments on the location and maturity of Aβ plaques. This may also contribute to the clinical trial failures of Aβ-therapies, suggesting that combinatorial regimens may be significantly more effective in clearing amyloid deposition.
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Affiliation(s)
- Daniel Kirschenbaum
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
| | | | - Francesca Catto
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
| | - Fabian F Voigt
- Laboratory of Neural Circuit Dynamics, Brain Research InstituteUniversity of ZurichZurichSwitzerland,Neuroscience Center ZurichUniversity of Zurich & ETH ZurichZurichSwitzerland
| | - Chiara Trevisan
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
| | - Oliver Bichsel
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
| | - Hamid Shirani
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping UniversityLinköpingSweden
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping UniversityLinköpingSweden
| | - Karl J Frontzek
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
| | - Paolo Paganetti
- Laboratory for Biomedical NeurosciencesTorricella‐TaverneNeurocenter of Southern Switzerland, Ente Cantonale OspedalieroSwitzerland,Faculty of Biomedical NeurosciencesUniversità della Svizzera ItalianaLuganoSwitzerland
| | - Fritjof Helmchen
- Laboratory of Neural Circuit Dynamics, Brain Research InstituteUniversity of ZurichZurichSwitzerland
| | - Jin Hyung Lee
- Department of BioengineeringStanford UniversityStanfordCAUSA,Department of Neurology and Neurological SciencesStanford UniversityStanfordCAUSA,Department of Electrical EngineeringStanford UniversityStanfordCAUSA,Department of NeurosurgeryStanford UniversityStanfordCAUSA
| | - Adriano Aguzzi
- Institute of NeuropathologyUniversity Hospital ZurichUniversity of ZurichZurichSwitzerland
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18
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Ilkhanizadeh S, Gracias A, Åslund AKO, Bäck M, Simon R, Neofytou C, Rraklli V, Migliori B, Kavanagh E, Nelander S, Westermark B, Uhrbom L, Forsberg-Nilsson K, Teixeira AI, Konradsson P, Uhlén P, Holmberg J, Joseph B, Nilsson KPR, Hermanson O. STEM-19. LIVE DETECTION OF NEURAL STEM AND GLIOBLASTOMA CELLS BY A LUMINESCENT CONJUGATED OLIGOTHIOPHENE DERIVATIVE. Neuro Oncol 2022. [PMCID: PMC9660628 DOI: 10.1093/neuonc/noac209.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Glioblastoma (GBM) is an aggressive nervous system tumor with a mean survival time of 12-14 months. Cells with neural stem cell-like properties can be derived from GBM tumors. These cells seem to escape conventional irradiation treatment, chemotherapy, and surgery, and may play a crucial role for relapse. It is therefore urgent to develop novel approaches for reliable detection of neural stem cell-like cells in GBM. Here we report a luminescent conjugated oligothiophene (LCO), named GlioStem (p-HTMI), for non-invasive and non-amplified real-time detection of live human patient-derived GBM cells and embryonic neural stem/progenitor cells (NSPCs). Within a maximum of 10 minutes after administration of the molecule in vitro, in the existing media, fluorescence emission was observed without any modulation of the cells or additional vehicle, resulting in efficient detection of cytoplasmic luminescent signal in NSPCs or GBM cells from rodents and humans, detectable at Alexa488/GFP wavelength. GlioStem is functionalized with a methylated imidazole moiety resembling the side chain of histidine/histamine, and non-methylated analogues were not functional. In vitro, GlioStem was shown to identify fetal cortical NSPCs from rat (FGF2-expanded), embryonic stem cell-derived NSPCs from mouse (FGF2/EGF-expanded), and FGF2-exposed C6 glioma cell cultures from rat, but not any other cell types investigated. Cell sorting experiments of patient-derived, FGF2/EGF-expanded GBM cells demonstrated that GlioStem in addition to NSPC-markers like Nestin and Sox2 labeled the same population (overlap > 90%) of cells as CD271, a proposed marker for stem cell-like cells and rapidly migrating cells in glioblastoma. Our results suggest that the LCO GlioStem is a versatile tool for immediate and selective detection of subpopulations of neural stem and glioma cells.
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Affiliation(s)
| | - Aileen Gracias
- Department of Neuroscience, Karolinska Institutet , Stockholm , Sweden
| | | | - Marcus Bäck
- IFM, Department of Chemistry , Linköping , Sweden
| | | | | | - Vilma Rraklli
- Department of Cell and Molecular Biology, Karolinska Institutet , Stockholm , Sweden
| | - Bianca Migliori
- Department of Neuroscience, Karolinska Institutet , Stockholm , Sweden
| | - Edel Kavanagh
- Institute of Environmental Medicine, Karolinska Institutet , Stockholm , Sweden
| | - Sven Nelander
- Department of Immunology, Genetics and Pathology, and Science for Life Laboratory, Rudbeck Laboratory, Uppsala University , Uppsala , Sweden
| | - Bengt Westermark
- Uppsala University, Dept. Immunology, Genetics and Pathology , Uppsala , Sweden
| | | | - Karin Forsberg-Nilsson
- Department of Immunology, Genetics and Pathology, and Science for Life Laboratory, Rudbeck Laboratory, Uppsala University , Uppsala , Sweden
| | - Ana I Teixeira
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm , Sweden
| | | | - Per Uhlén
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm , Sweden
| | - Johan Holmberg
- Department of Cell and Molecular Biology, Karolinska Institutet , Stockholm , Sweden
| | - Bertrand Joseph
- Institute of Environmental Medicine, Karolinska Institutet , Stockholm , Sweden
| | | | - Ola Hermanson
- Department of Neuroscience, Karolinska Institutet , Stockholm , Sweden
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19
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Björk L, Bäck M, Lantz L, Ghetti B, Vidal R, Klingstedt T, Nilsson KPR. Proteophenes - Amino Acid Functionalized Thiophene-based Fluorescent Ligands for Visualization of Protein Deposits in Tissue Sections with Alzheimer's Disease Pathology. Chemistry 2022; 28:e202201557. [PMID: 35950816 PMCID: PMC9643645 DOI: 10.1002/chem.202201557] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 01/11/2023]
Abstract
Protein deposits composed of specific proteins or peptides are associated with several neurodegenerative diseases and fluorescent ligands able to detect these pathological hallmarks are vital. Here, we report the synthesis of a class of thiophene-based ligands, denoted proteophenes, with different amino acid side-chain functionalities along the conjugated backbone, which display selectivity towards specific disease-associated protein aggregates in tissue sections with Alzheimer's disease (AD) pathology. The selectivity of the ligands towards AD associated pathological hallmarks, such as aggregates of the amyloid-β (Aβ) peptide or tau filamentous inclusions, was highly dependent on the chemical nature of the amino acid functionality, as well as on the location of the functionality along the pentameric thiophene backbone. Finally, the concept of synthesizing donor-acceptor-donor proteophenes with distinct photophysical properties was shown. Our findings provide the structural and functional basis for the development of new thiophene-based ligands that can be utilized for optical assignment of different aggregated proteinaceous species in tissue sections.
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Affiliation(s)
- Linnea Björk
- Department of PhysicsChemistry and BiologyLinköping University581 83LinköpingSweden
| | - Marcus Bäck
- Department of PhysicsChemistry and BiologyLinköping University581 83LinköpingSweden
| | - Linda Lantz
- Department of PhysicsChemistry and BiologyLinköping University581 83LinköpingSweden
| | - Bernardino Ghetti
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolis46202IndianaUSA
| | - Ruben Vidal
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolis46202IndianaUSA
| | - Therése Klingstedt
- Department of PhysicsChemistry and BiologyLinköping University581 83LinköpingSweden
| | - K. Peter R. Nilsson
- Department of PhysicsChemistry and BiologyLinköping University581 83LinköpingSweden
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20
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Ni R, Chen Z, Deán-Ben XL, Voigt FF, Kirschenbaum D, Shi G, Villois A, Zhou Q, Crimi A, Arosio P, Nitsch RM, Nilsson KPR, Aguzzi A, Helmchen F, Klohs J, Razansky D. Multiscale optical and optoacoustic imaging of amyloid-β deposits in mice. Nat Biomed Eng 2022; 6:1031-1044. [PMID: 35835994 DOI: 10.1038/s41551-022-00906-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 05/27/2022] [Indexed: 12/26/2022]
Abstract
Deposits of amyloid-β (Aβ) in the brains of rodents can be analysed by invasive intravital microscopy on a submillimetre scale, or via whole-brain images from modalities lacking the resolution or molecular specificity to accurately characterize Aβ pathologies. Here we show that large-field multifocal illumination fluorescence microscopy and panoramic volumetric multispectral optoacoustic tomography can be combined to longitudinally assess Aβ deposits in transgenic mouse models of Alzheimer's disease. We used fluorescent Aβ-targeted probes (the luminescent conjugated oligothiophene HS-169 and the oxazine-derivative AOI987) to transcranially detect Aβ deposits in the cortex of APP/PS1 and arcAβ mice with single-plaque resolution (8 μm) and across the whole brain (including the hippocampus and the thalamus, which are inaccessible by conventional intravital microscopy) at sub-150 μm resolutions. Two-photon microscopy, light-sheet microscopy and immunohistochemistry of brain-tissue sections confirmed the specificity and regional distributions of the deposits. High-resolution multiscale optical and optoacoustic imaging of Aβ deposits across the entire brain in rodents thus facilitates the in vivo study of Aβ accumulation by brain region and by animal age and strain.
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Affiliation(s)
- Ruiqing Ni
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland.,Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
| | - Zhenyue Chen
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Xosé Luís Deán-Ben
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Fabian F Voigt
- Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.,Brain Research Institute, University of Zurich, Zurich, Switzerland
| | | | - Gloria Shi
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Alessia Villois
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Quanyu Zhou
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Alessandro Crimi
- Institute of Neuropathology, Universitätsspital Zurich, Zurich, Switzerland
| | - Paolo Arosio
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Roger M Nitsch
- Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Adriano Aguzzi
- Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.,Institute of Neuropathology, Universitätsspital Zurich, Zurich, Switzerland
| | - Fritjof Helmchen
- Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.,Brain Research Institute, University of Zurich, Zurich, Switzerland
| | - Jan Klohs
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland. .,Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland.
| | - Daniel Razansky
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland. .,Zurich Neuroscience Center (ZNZ), University of Zurich and ETH Zurich, Zurich, Switzerland. .,Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
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21
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Just MK, Gram H, Theologidis V, Jensen PH, Nilsson KPR, Lindgren M, Knudsen K, Borghammer P, Van Den Berge N. Alpha-Synuclein Strain Variability in Body-First and Brain-First Synucleinopathies. Front Aging Neurosci 2022; 14:907293. [PMID: 35693346 PMCID: PMC9178288 DOI: 10.3389/fnagi.2022.907293] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/02/2022] [Indexed: 12/15/2022] Open
Abstract
Pathogenic alpha-synuclein (asyn) aggregates are a defining feature of neurodegenerative synucleinopathies, which include Parkinson's disease, Lewy body dementia, pure autonomic failure and multiple system atrophy. Early accurate differentiation between these synucleinopathies is challenging due to the highly heterogeneous clinical profile at early prodromal disease stages. Therefore, diagnosis is often made in late disease stages when a patient presents with a broad range of motor and non-motor symptoms easing the differentiation. Increasing data suggest the clinical heterogeneity seen in patients is explained by the presence of distinct asyn strains, which exhibit variable morphologies and pathological functions. Recently, asyn seed amplification assays (PMCA and RT-QuIC) and conformation-specific ligand assays have made promising progress in differentiating between synucleinopathies in prodromal and advanced disease stages. Importantly, the cellular environment is known to impact strain morphology. And, asyn aggregate pathology can propagate trans-synaptically along the brain-body axis, affecting multiple organs and propagating through multiple cell types. Here, we present our hypothesis that the changing cellular environments, an asyn seed may encounter during its brain-to-body or body-to-brain propagation, may influence the structure and thereby the function of the aggregate strains developing within the different cells. Additionally, we aim to review strain characteristics of the different synucleinopathies in clinical and preclinical studies. Future preclinical animal models of synucleinopathies should investigate if asyn strain morphology is altered during brain-to-body and body-to-brain spreading using these seeding amplification and conformation-specific assays. Such findings would greatly deepen our understanding of synucleinopathies and the potential link between strain and phenotypic variability, which may enable specific diagnosis of different synucleinopathies in the prodromal phase, creating a large therapeutic window with potential future applications in clinical trials and personalized therapeutics.
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Affiliation(s)
- Mie Kristine Just
- Institute for Clinical Medicine, Aarhus University, Aarhus, Denmark
- Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
| | - Hjalte Gram
- Department of Biomedicine, DANDRITE-Danish Research Institute of Translational Neuroscience, Aarhus University, Aarhus, Denmark
| | - Vasileios Theologidis
- Department of Biomedicine, DANDRITE-Danish Research Institute of Translational Neuroscience, Aarhus University, Aarhus, Denmark
| | - Poul Henning Jensen
- Department of Biomedicine, DANDRITE-Danish Research Institute of Translational Neuroscience, Aarhus University, Aarhus, Denmark
| | - K. Peter R. Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway
| | - Karoline Knudsen
- Institute for Clinical Medicine, Aarhus University, Aarhus, Denmark
- Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
| | - Per Borghammer
- Institute for Clinical Medicine, Aarhus University, Aarhus, Denmark
- Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
| | - Nathalie Van Den Berge
- Institute for Clinical Medicine, Aarhus University, Aarhus, Denmark
- Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
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22
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Butina K, Lantz L, Choong FX, Tomac A, Shirani H, Löffler S, Nilsson KPR, Richter‐Dahlfors A. Structural Properties Dictating Selective Optotracer Detection of
Staphylococcus aureus. Chembiochem 2022. [DOI: 10.1002/cbic.202200262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Karen Butina
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Neuroscience Karolinska Institutet Solnavägen 9 17177 Stockholm Sweden
| | - Linda Lantz
- Department of Chemistry IFM Linköping University 58183 Linköping Sweden
| | - Ferdinand X. Choong
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Neuroscience Karolinska Institutet Solnavägen 9 17177 Stockholm Sweden
| | - Ana Tomac
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Neuroscience Karolinska Institutet Solnavägen 9 17177 Stockholm Sweden
| | - Hamid Shirani
- Department of Chemistry IFM Linköping University 58183 Linköping Sweden
| | - Susanne Löffler
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Neuroscience Karolinska Institutet Solnavägen 9 17177 Stockholm Sweden
| | - K. Peter R. Nilsson
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Chemistry IFM Linköping University 58183 Linköping Sweden
| | - Agneta Richter‐Dahlfors
- AIMES – Center for the Advancement of Integrated Medical and Engineering Sciences Karolinska Institutet and KTH Royal Institute of Technology Solnavägen 9 17177 Stockholm Sweden
- Department of Neuroscience Karolinska Institutet Solnavägen 9 17177 Stockholm Sweden
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23
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Faustini G, Longhena F, Masato A, Bassareo V, Frau R, Klingstedt T, Shirani H, Brembati V, Parrella E, Vezzoli M, Nilsson KPR, Pizzi M, Spillantini MG, Bubacco L, Bellucci A. Synapsin III gene silencing redeems alpha-synuclein transgenic mice from Parkinson's disease-like phenotype. Mol Ther 2022; 30:1465-1483. [PMID: 35038583 PMCID: PMC9077321 DOI: 10.1016/j.ymthe.2022.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 05/26/2021] [Revised: 10/20/2021] [Accepted: 01/12/2022] [Indexed: 10/19/2022] Open
Abstract
Fibrillary aggregated α-synuclein (α-syn) deposition in Lewy bodies (LB) characterizes Parkinson's disease (PD) and is believed to trigger dopaminergic synaptic failure and a retrograde terminal-to-cell body neuronal degeneration. We described that the neuronal phosphoprotein synapsin III (Syn III) cooperates with α-syn to regulate dopamine (DA) release and can be found in the insoluble α-syn fibrils composing LB. Moreover, we showed that α-syn aggregates deposition, and the associated onset of synaptic deficits and neuronal degeneration occurring following adeno-associated viral vectors-mediated overexpression of human α-syn in the nigrostriatal system are hindered in Syn III knock out mice. This supports that Syn III facilitates α-syn aggregation. Here, in an interventional experimental design, we found that by inducing the gene silencing of Syn III in human α-syn transgenic mice at PD-like stage with advanced α-syn aggregation and overt striatal synaptic failure, we could lower α-syn aggregates and striatal fibers loss. In parallel, we observed recovery from synaptic vesicles clumping, DA release failure, and motor functions impairment. This supports that Syn III consolidates α-syn aggregates, while its downregulation enables their reduction and redeems the PD-like phenotype. Strategies targeting Syn III could thus constitute a therapeutic option for PD.
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Affiliation(s)
- Gaia Faustini
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Francesca Longhena
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Anna Masato
- Department of Biology, University of Padova, Via Ugo Bassi 58b, 35121 Padua, Italy
| | - Valentina Bassareo
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Blocco A, Cagliari, 09124 Cagliari, Italy
| | - Roberto Frau
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Blocco A, Cagliari, 09124 Cagliari, Italy
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Viviana Brembati
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Edoardo Parrella
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Marika Vezzoli
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Marina Pizzi
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Maria Grazia Spillantini
- Department of Clinical Neurosciences, University of Cambridge, Clifford Albutt Building, Cambridge CB2 0AH, UK
| | - Luigi Bubacco
- Department of Biology, University of Padova, Via Ugo Bassi 58b, 35121 Padua, Italy
| | - Arianna Bellucci
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy.
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24
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Butina K, Lantz L, Choong FX, Tomac A, Shirani H, Löffler S, Nilsson KPR, Richter-Dahlfors A. Structural Properties Dictating Selective Optotracer Detection of S. aureus. Chembiochem 2022; 23:e202100684. [PMID: 35298076 PMCID: PMC9400997 DOI: 10.1002/cbic.202100684] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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] [Received: 12/15/2021] [Revised: 03/16/2022] [Indexed: 11/09/2022]
Abstract
Optotracers are conformation‐sensitive fluorescent tracer molecules that detect peptide‐ and carbohydrate‐based biopolymers. Their binding to bacterial cell walls allows selective detection and visualisation of Staphylococcus aureus (S. aureus). Here, we investigated the structural properties providing optimal detection of S. aureus. We quantified spectral shifts and fluorescence intensity in mixes of bacteria and optotracers, using automatic peak analysis, cross‐correlation, and area‐under‐curve analysis. We found that the length of the conjugated backbone and the number of charged groups, but not their distribution, are important factors for selective detection of S. aureus. The photophysical properties of optotracers were greatly improved by incorporating a donor‐acceptor‐donor (D‐A‐D)‐type motif in the conjugated backbone. With significantly reduced background and binding‐induced on‐switch of fluorescence, these optotracers enabled real‐time recordings of S. aureus growth. Collectively, this demonstrates that chemical structure and photophysics are key tunable characteristics in the development of optotracers for selective detection of bacterial species.
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Affiliation(s)
| | - Linda Lantz
- Linköping University: Linkopings universitet, Dept. of Chemistry IFM, SWEDEN
| | | | - Ana Tomac
- Karolinska Institutet, Neuroscience, SWEDEN
| | - Hamid Shirani
- Linköping University: Linkopings universitet, Dept of Chemistry IFM, SWEDEN
| | | | - K Peter R Nilsson
- Linköping University: Linkopings universitet, Dept. of Chemistry IFM, SWEDEN
| | - Agneta Richter-Dahlfors
- Karolinska Institutet, Department of Neuroscience, Retzius väg 8, S-17177, Stockholm, SWEDEN
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25
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Wennström M, Janelidze S, Nilsson KPR, Serrano GE, Beach TG, Dage JL, Hansson O. Cellular localization of p-tau217 in brain and its association with p-tau217 plasma levels. Acta Neuropathol Commun 2022; 10:3. [PMID: 34991721 PMCID: PMC8734209 DOI: 10.1186/s40478-021-01307-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 12/22/2021] [Accepted: 12/22/2021] [Indexed: 01/04/2023] Open
Abstract
Recent studies highlight phosphorylated tau (p-tau) at threonine tau 217 (p-tau217) as a new promising plasma biomarker for pathological changes implicated in Alzheimer's disease (AD), but the specific brain pathological events related to the alteration in p-tau217 plasma levels are still largely unknown. Using immunostaining techniques of postmortem AD brain tissue, we show that p-tau217 is found in neurofibrillary tangles (NFTs) and neuropil threads that are also positive for p-tau181, 202, 202/205, 231, and 369/404. The p-tau217, but not the other five p-tau variants, was also prominently seen in vesicles structure positive for markers of granulovacuolar degeneration bodies and multi-vesicular bodies. Further, individuals with a high likelihood of AD showed significantly higher p-tau217 area fraction in 4 different brain areas (entorhinal cortex, inferior temporal gyrus, and superior frontal gyrus) compared to those with Primary age related tauopathy or other non-AD tauopathies. The p-tau217 area fraction correlated strongly with total amyloid-beta (Aβ) and NFT brain load when the whole group was analyzed. Finally, the mean p-tau217 area fraction correlated significantly with p-tau217 concentrations in antemortem collected plasma specifically in individuals with amyloid plaques and not in those without amyloid plaques. These studies highlight differences in cellular localization of different p-tau variants and suggest that plasma levels of p-tau217 reflect an accumulation of p-tau217 in presence of Aβ plaque load.
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Affiliation(s)
- Malin Wennström
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Inga Marie Nilssons gata 53, 214 28, Malmö, Sweden.
| | - Shorena Janelidze
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Inga Marie Nilssons gata 53, 214 28, Malmö, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology IFM, Linköping University, 581 83, Linköping, Sweden
| | | | | | - Jeffrey L Dage
- Eli Lilly and Company, Indianapolis, IN, USA
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Oskar Hansson
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Inga Marie Nilssons gata 53, 214 28, Malmö, Sweden.
- Memory Clinic, Skåne University Hospital, Malmö, Sweden.
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26
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Wagner J, Degenhardt K, Veit M, Louros N, Konstantoulea K, Skodras A, Wild K, Liu P, Obermüller U, Bansal V, Dalmia A, Häsler LM, Lambert M, De Vleeschouwer M, Davies HA, Madine J, Kronenberg-Versteeg D, Feederle R, Del Turco D, Nilsson KPR, Lashley T, Deller T, Gearing M, Walker LC, Heutink P, Rousseau F, Schymkowitz J, Jucker M, Neher JJ. Medin co-aggregates with vascular amyloid-β in Alzheimer's disease. Nature 2022; 612:123-131. [PMID: 36385530 PMCID: PMC9712113 DOI: 10.1038/s41586-022-05440-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [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: 02/08/2021] [Accepted: 10/12/2022] [Indexed: 11/17/2022]
Abstract
Aggregates of medin amyloid (a fragment of the protein MFG-E8, also known as lactadherin) are found in the vasculature of almost all humans over 50 years of age1,2, making it the most common amyloid currently known. We recently reported that medin also aggregates in blood vessels of ageing wild-type mice, causing cerebrovascular dysfunction3. Here we demonstrate in amyloid-β precursor protein (APP) transgenic mice and in patients with Alzheimer's disease that medin co-localizes with vascular amyloid-β deposits, and that in mice, medin deficiency reduces vascular amyloid-β deposition by half. Moreover, in both the mouse and human brain, MFG-E8 is highly enriched in the vasculature and both MFG-E8 and medin levels increase with the severity of vascular amyloid-β burden. Additionally, analysing data from 566 individuals in the ROSMAP cohort, we find that patients with Alzheimer's disease have higher MFGE8 expression levels, which are attributable to vascular cells and are associated with increased measures of cognitive decline, independent of plaque and tau pathology. Mechanistically, we demonstrate that medin interacts directly with amyloid-β to promote its aggregation, as medin forms heterologous fibrils with amyloid-β, affects amyloid-β fibril structure, and cross-seeds amyloid-β aggregation both in vitro and in vivo. Thus, medin could be a therapeutic target for prevention of vascular damage and cognitive decline resulting from amyloid-β deposition in the blood vessels of the brain.
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Affiliation(s)
- Jessica Wagner
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany ,grid.10392.390000 0001 2190 1447Graduate School of Cellular and Molecular Neuroscience, University of Tübingen, Tübingen, Germany
| | - Karoline Degenhardt
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany ,grid.10392.390000 0001 2190 1447Graduate School of Cellular and Molecular Neuroscience, University of Tübingen, Tübingen, Germany
| | - Marleen Veit
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany ,grid.10392.390000 0001 2190 1447Graduate School of Cellular and Molecular Neuroscience, University of Tübingen, Tübingen, Germany
| | - Nikolaos Louros
- grid.511015.1Switch Laboratory, VIB-KU Leuven Center for Brain and Disease Research, Leuven, Belgium ,grid.5596.f0000 0001 0668 7884Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Katerina Konstantoulea
- grid.511015.1Switch Laboratory, VIB-KU Leuven Center for Brain and Disease Research, Leuven, Belgium ,grid.5596.f0000 0001 0668 7884Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Angelos Skodras
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Katleen Wild
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Ping Liu
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany ,grid.10392.390000 0001 2190 1447Graduate School of Cellular and Molecular Neuroscience, University of Tübingen, Tübingen, Germany
| | - Ulrike Obermüller
- grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Vikas Bansal
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Anupriya Dalmia
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Lisa M. Häsler
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Marius Lambert
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Matthias De Vleeschouwer
- grid.511015.1Switch Laboratory, VIB-KU Leuven Center for Brain and Disease Research, Leuven, Belgium ,grid.5596.f0000 0001 0668 7884Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Hannah A. Davies
- grid.10025.360000 0004 1936 8470Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK ,grid.10025.360000 0004 1936 8470Liverpool Centre for Cardiovascular Sciences, University of Liverpool, Liverpool, UK
| | - Jillian Madine
- grid.10025.360000 0004 1936 8470Liverpool Centre for Cardiovascular Sciences, University of Liverpool, Liverpool, UK ,grid.10025.360000 0004 1936 8470Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Deborah Kronenberg-Versteeg
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Regina Feederle
- grid.4567.00000 0004 0483 2525Monoclonal Antibody Core Facility, Institute for Diabetes and Obesity, Helmholtz Zentrum München, Research Center for Environmental Health, Neuherberg, Germany ,grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Domenico Del Turco
- grid.7839.50000 0004 1936 9721Institute of Clinical Neuroanatomy, Dr. Senckenberg Anatomy, Neuroscience Center, Goethe University, Frankfurt/Main, Germany
| | - K. Peter R. Nilsson
- grid.5640.70000 0001 2162 9922Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Tammaryn Lashley
- grid.83440.3b0000000121901201Queen Square Brain Bank for Neurological Disorders, University College London Queen Square Institute of Neurology, London, UK ,grid.83440.3b0000000121901201Department of Neurodegenerative Disease, University College London Queen Square Institute of Neurology, London, UK
| | - Thomas Deller
- grid.7839.50000 0004 1936 9721Institute of Clinical Neuroanatomy, Dr. Senckenberg Anatomy, Neuroscience Center, Goethe University, Frankfurt/Main, Germany
| | - Marla Gearing
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine and Department of Neurology, Emory University School of Medicine, Atlanta, GA USA
| | - Lary C. Walker
- grid.189967.80000 0001 0941 6502Department of Neurology and Emory National Primate Research Center, Emory University, Atlanta, GA USA
| | - Peter Heutink
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Frederic Rousseau
- grid.511015.1Switch Laboratory, VIB-KU Leuven Center for Brain and Disease Research, Leuven, Belgium ,grid.5596.f0000 0001 0668 7884Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Joost Schymkowitz
- grid.511015.1Switch Laboratory, VIB-KU Leuven Center for Brain and Disease Research, Leuven, Belgium ,grid.5596.f0000 0001 0668 7884Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Mathias Jucker
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Jonas J. Neher
- grid.424247.30000 0004 0438 0426German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany ,grid.10392.390000 0001 2190 1447Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
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27
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Liu H, Kim C, Haldiman T, Sigurdson CJ, Nyström S, Nilsson KPR, Cohen ML, Wisniewski T, Hammarström P, Safar JG. Distinct conformers of amyloid beta accumulate in the neocortex of patients with rapidly progressive Alzheimer's disease. J Biol Chem 2021; 297:101267. [PMID: 34599965 PMCID: PMC8531671 DOI: 10.1016/j.jbc.2021.101267] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 05/11/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/03/2022] Open
Abstract
Amyloid beta (Aβ) deposition in the neocortex is a major hallmark of Alzheimer's disease (AD), but the extent of deposition does not readily explain phenotypic diversity and rate of disease progression. The prion strain-like model of disease heterogeneity suggests the existence of different conformers of Aβ. We explored this paradigm using conformation-dependent immunoassay (CDI) for Aβ and conformation-sensitive luminescent conjugated oligothiophenes (LCOs) in AD cases with variable progression rates. Mapping the Aβ conformations in the frontal, occipital, and temporal regions in 20 AD patients with CDI revealed extensive interindividual and anatomical diversity in the structural organization of Aβ with the most significant differences in the temporal cortex of rapidly progressive AD. The fluorescence emission spectra collected in situ from Aβ plaques in the same regions demonstrated considerable diversity of spectral characteristics of two LCOs-quatroformylthiophene acetic acid and heptaformylthiophene acetic acid. Heptaformylthiophene acetic acid detected a wider range of Aβ deposits, and both LCOs revealed distinct spectral attributes of diffuse and cored plaques in the temporal cortex of rapidly and slowly progressive AD and less frequent and discernible differences in the frontal and occipital cortex. These and CDI findings indicate a major conformational diversity of Aβ accumulating in the neocortex, with the most notable differences in temporal cortex of cases with shorter disease duration, and implicate distinct Aβ conformers (strains) in the rapid progression of AD.
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Affiliation(s)
- He Liu
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Chae Kim
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Tracy Haldiman
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Christina J Sigurdson
- Department of Pathology, University of California, San Diego, La Jolla, California, USA; Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Sofie Nyström
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - Mark L Cohen
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, USA; National Prion Disease Pathology Surveillance Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Thomas Wisniewski
- Centre for Cognitive Neurology, Department of Neurology, New York University School of Medicine, New York, New York, USA; Department of Psychiatry, New York University School of Medicine, New York, New York, USA
| | - Per Hammarström
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - Jiri G Safar
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio, USA; Department of Neurology, Case Western Reserve University, Cleveland, Ohio, USA.
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28
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Todarwal Y, Gustafsson C, Thi Minh NN, Ertzgaard I, Klingstedt T, Ghetti B, Vidal R, König C, Lindgren M, Nilsson KPR, Linares M, Norman P. Tau Protein Binding Modes in Alzheimer's Disease for Cationic Luminescent Ligands. J Phys Chem B 2021; 125:11628-11636. [PMID: 34643404 PMCID: PMC8558859 DOI: 10.1021/acs.jpcb.1c06019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Indexed: 11/28/2022]
Abstract
The bi-thiophene-vinylene-benzothiazole (bTVBT4) ligand developed for Alzheimer's disease (AD)-specific detection of amyloid tau has been studied by a combination of several theoretical methods and experimental spectroscopies. With reference to the cryo-EM tau structure of the tau protofilament ( Nature 2017, 547, 185), a periodic model system of the fibril was created, and the interactions between this fibril and bTVBT4 were studied with nonbiased molecular dynamics simulations. Several binding sites and binding modes were identified and analyzed, and the results for the most prevailing fibril site and ligand modes are presented. A key validation of the simulation work is provided by the favorable comparison of the theoretical and experimental absorption spectra of bTVBT4 in solution and bound to the protein. It is conclusively shown that the ligand-protein binding occurs at the hydrophobic pocket defined by the residues Ile360, Thr361, and His362. This binding site is not accessible in the Pick's disease (PiD) fold, and fluorescence imaging of bTVBT4-stained brain tissue samples from patients diagnosed with AD and PiD provides strong support for the proposed tau binding site.
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Affiliation(s)
- Yogesh Todarwal
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Camilla Gustafsson
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Nghia Nguyen Thi Minh
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstr. 3A, 30167 Hannover, Germany
| | - Ingrid Ertzgaard
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, SE 581 83 Linköping, Sweden
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Ruben Vidal
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Carolin König
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstr. 3A, 30167 Hannover, Germany
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Mathieu Linares
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden.,Laboratory of Organic Electronics, ITN, Linköping University, SE-581 83 Linköping, Sweden.,Scientific Visualization Group, ITN, Linköping University, SE-581 83 Linköping, Sweden
| | - Patrick Norman
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
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29
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Klingstedt T, Shirani H, Ghetti B, Vidal R, R. Nilsson KP. Thiophene-Based Optical Ligands That Selectively Detect Aβ Pathology in Alzheimer's Disease. Chembiochem 2021; 22:2568-2581. [PMID: 34101954 PMCID: PMC8409278 DOI: 10.1002/cbic.202100199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/26/2021] [Revised: 06/04/2021] [Indexed: 11/25/2022]
Abstract
In several neurodegenerative diseases, the presence of aggregates of specific proteins in the brain is a significant pathological hallmark; thus, developing ligands able to bind to the aggregated proteins is essential for any effort related to imaging and therapeutics. Here we report the synthesis of thiophene-based ligands containing nitrogen heterocycles. The ligands selectively recognized amyloid-β (Aβ) aggregates in brain tissue from individuals diagnosed neuropathologically as having Alzheimer's disease (AD). The selectivity for Aβ was dependent on the position of nitrogen in the heterocyclic compounds, and the ability to bind Aβ was shown to be reduced when introducing anionic substituents on the thiophene backbone. Our findings provide the structural and functional basis for the development of ligands that can differentiate between aggregated proteinaceous species comprised of distinct proteins. These ligands might also be powerful tools for studying the pathogenesis of Aβ aggregation and for designing molecules for imaging of Aβ pathology.
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Affiliation(s)
- Therése Klingstedt
- Department of PhysicsChemistry and BiologyLinköping UniversitySE-581 83LinköpingSweden
| | - Hamid Shirani
- Department of PhysicsChemistry and BiologyLinköping UniversitySE-581 83LinköpingSweden
| | - Bernardino Ghetti
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolis46202IndianaUSA
| | - Ruben Vidal
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolis46202IndianaUSA
| | - K. Peter R. Nilsson
- Department of PhysicsChemistry and BiologyLinköping UniversitySE-581 83LinköpingSweden
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30
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Ruiz-Riquelme A, Mao A, Barghash MM, Lau HHC, Stuart E, Kovacs GG, Nilsson KPR, Fraser PE, Schmitt-Ulms G, Watts JC. Aβ43 aggregates exhibit enhanced prion-like seeding activity in mice. Acta Neuropathol Commun 2021; 9:83. [PMID: 33971978 PMCID: PMC8112054 DOI: 10.1186/s40478-021-01187-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 04/24/2021] [Indexed: 02/07/2023] Open
Abstract
When injected into genetically modified mice, aggregates of the amyloid-β (Aβ) peptide from the brains of Alzheimer’s disease (AD) patients or transgenic AD mouse models seed cerebral Aβ deposition in a prion-like fashion. Within the brain, Aβ exists as a pool of distinct C-terminal variants with lengths ranging from 37 to 43 amino acids, yet the relative contribution of individual C-terminal Aβ variants to the seeding behavior of Aβ aggregates remains unknown. Here, we have investigated the relative seeding activities of Aβ aggregates composed exclusively of recombinant Aβ38, Aβ40, Aβ42, or Aβ43. Cerebral Aβ42 levels were not increased in AppNL−F knock-in mice injected with Aβ38 or Aβ40 aggregates and were only increased in a subset of mice injected with Aβ42 aggregates. In contrast, significant accumulation of Aβ42 was observed in the brains of all mice inoculated with Aβ43 aggregates, and the extent of Aβ42 induction was comparable to that in mice injected with brain-derived Aβ seeds. Mice inoculated with Aβ43 aggregates exhibited a distinct pattern of cerebral Aβ pathology compared to mice injected with brain-derived Aβ aggregates, suggesting that recombinant Aβ43 may polymerize into a unique strain. Our results indicate that aggregates containing longer Aβ C-terminal variants are more potent inducers of cerebral Aβ deposition and highlight the potential role of Aβ43 seeds as a crucial factor in the initial stages of Aβ pathology in AD.
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31
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Reyes JF, Ekmark-Léwen S, Perdiki M, Klingstedt T, Hoffmann A, Wiechec E, Nilsson P, Nilsson KPR, Alafuzoff I, Ingelsson M, Hallbeck M. Accumulation of alpha-synuclein within the liver, potential role in the clearance of brain pathology associated with Parkinson's disease. Acta Neuropathol Commun 2021; 9:46. [PMID: 33743820 PMCID: PMC7980682 DOI: 10.1186/s40478-021-01136-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022] Open
Abstract
Alpha-synuclein (α-syn) aggregation is the hallmark pathological lesion in brains of patients with Parkinson's disease (PD) and related neurological disorders characterized as synucleinopathies. Accumulating evidence now indicates that α-syn deposition is also present within the gut and other peripheral organs outside the central nervous system (CNS). In the current study, we demonstrate for the first time that α-syn pathology also accumulates within the liver, the main organ responsible for substance clearance and detoxification. We further demonstrate that cultured human hepatocytes readily internalize oligomeric α-syn assemblies mediated, at least in part, by the gap junction protein connexin-32 (Cx32). Moreover, we identified a time-dependent accumulation of α-syn within the liver of three different transgenic (tg) mouse models expressing human α-syn under CNS-specific promoters, despite the lack of α-syn mRNA expression within the liver. Such a brain-to-liver transmission route could be further corroborated by detection of α-syn pathology within the liver of wild type mice one month after a single striatal α-syn injection. In contrast to the synucleinopathy models, aged mice modeling AD rarely show any amyloid-beta (Aß) deposition within the liver. In human post-mortem liver tissue, we identified cases with neuropathologically confirmed α-syn pathology containing α-syn within hepatocellular structures to a higher degree (75%) than control subjects without α-syn accumulation in the brain (57%). Our results reveal that α-syn accumulates within the liver and may be derived from the brain or other peripheral sources. Collectively, our findings indicate that the liver may play a role in the clearance and detoxification of pathological proteins in PD and related synucleinopathies.
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Affiliation(s)
- Juan F Reyes
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden.
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden.
| | - Sara Ekmark-Léwen
- Department of Public Health and Caring Sciences, Section of Geriatrics, Uppsala University, Uppsala, Sweden
| | - Marina Perdiki
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Alana Hoffmann
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Emilia Wiechec
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Otorhinolaryngology, Anesthetics, Operations and Special Surgery Center, Linköping University, 581 85, Linköping, Sweden
| | - Per Nilsson
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 171 64, Solna, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Irina Alafuzoff
- Department of Pathology, Uppsala University Hospital, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Section of Geriatrics, Uppsala University, Uppsala, Sweden
| | - Martin Hallbeck
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden
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32
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Gustafsson C, Shirani H, Leira P, Rehn DR, Linares M, Nilsson KPR, Norman P, Lindgren M. Deciphering the Electronic Transitions of Thiophene-Based Donor-Acceptor-Donor Pentameric Ligands Utilized for Multimodal Fluorescence Microscopy of Protein Aggregates. Chemphyschem 2021; 22:323-335. [PMID: 33219724 PMCID: PMC7898931 DOI: 10.1002/cphc.202000669] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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] [Received: 07/31/2020] [Revised: 10/28/2020] [Indexed: 12/23/2022]
Abstract
Anionic pentameric thiophene acetates can be used for fluorescence detection and diagnosis of protein amyloid aggregates. Replacing the central thiophene unit by benzothiadiazole (BTD) or quinoxaline (QX) leads to large emission shifts and basic spectral features have been reported [Chem. Eur. J. 2015, 21, 15133‐13137]. Here we present new detailed experimental results of solvent effects, time‐resolved fluorescence and examples employing multi‐photon microscopy and lifetime imaging. Quantum chemical response calculations elucidate how the introduction of the BTD/QX groups changes the electronic states and emissions. The dramatic red‐shift follows an increased conjugation and quinoid character of the π‐electrons of the thiophene backbone. An efficient charge transfer in the excited states S1 and S2 compared to the all‐thiophene analogue makes these more sensitive to the polarity and quenching by the solvent. Taken together, the results guide in the interpretation of images of stained Alzheimer disease brain sections employing advanced fluorescence microscopy and lifetime imaging, and can aid in optimizing future fluorescent ligand development.
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Affiliation(s)
- Camilla Gustafsson
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Hamid Shirani
- Division of Chemistry, Department of Physics, Chemistry and Biology Linköping University, 581 83, Linköping, Sweden
| | - Petter Leira
- Department of Physics-Faculty of Natural Sciences, Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway
| | - Dirk R Rehn
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Mathieu Linares
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology, 106 91, Stockholm, Sweden.,Laboratory of Organic Electronics and Scientific Visualization Group, ITN and Swedish e-Science Research Center (SeRC) Linköping University, 581 83, Linköping, Sweden
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology Linköping University, 581 83, Linköping, Sweden
| | - Patrick Norman
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Mikael Lindgren
- Department of Physics-Faculty of Natural Sciences, Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway
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33
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Zarb Y, Sridhar S, Nassiri S, Utz SG, Schaffenrath J, Maheshwari U, Rushing EJ, Nilsson KPR, Delorenzi M, Colonna M, Greter M, Keller A. Microglia control small vessel calcification via TREM2. Sci Adv 2021; 7:eabc4898. [PMID: 33637522 PMCID: PMC7909879 DOI: 10.1126/sciadv.abc4898] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 01/15/2021] [Indexed: 05/03/2023]
Abstract
Microglia participate in central nervous system (CNS) development and homeostasis and are often implicated in modulating disease processes. However, less is known about the role of microglia in the biology of the neurovascular unit (NVU). In particular, data are scant on whether microglia are involved in CNS vascular pathology. In this study, we use a mouse model of primary familial brain calcification, Pdgfbret/ret , to investigate the role of microglia in calcification of the NVU. We report that microglia enclosing vessel calcifications, coined calcification-associated microglia, display a distinct activation phenotype. Pharmacological ablation of microglia with the CSF1R inhibitor PLX5622 leads to aggravated vessel calcification. Mechanistically, we show that microglia require functional TREM2 for controlling vascular calcification. Our results demonstrate that microglial activity in the setting of pathological vascular calcification is beneficial. In addition, we identify a previously unrecognized function of microglia in halting the expansion of vascular calcification.
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Affiliation(s)
- Yvette Zarb
- Department of Neurosurgery, Clinical Neurocentre, Zurich University Hospital, Zurich University, Zürich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Sucheta Sridhar
- Department of Neurosurgery, Clinical Neurocentre, Zurich University Hospital, Zurich University, Zürich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Sina Nassiri
- Bioinformatics Core Facility, Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Sebastian Guido Utz
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Johanna Schaffenrath
- Department of Neurosurgery, Clinical Neurocentre, Zurich University Hospital, Zurich University, Zürich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Upasana Maheshwari
- Department of Neurosurgery, Clinical Neurocentre, Zurich University Hospital, Zurich University, Zürich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Elisabeth J Rushing
- Institute of Neuropathology, Zurich University Hospital, Zurich, Switzerland
| | | | - Mauro Delorenzi
- Bioinformatics Core Facility, Swiss Institute of Bioinformatics, Lausanne, Switzerland
- Department of Oncology, University Lausanne, Lausanne, Switzerland
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Melanie Greter
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Annika Keller
- Department of Neurosurgery, Clinical Neurocentre, Zurich University Hospital, Zurich University, Zürich, Switzerland.
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
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34
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Ni R, Chen Z, Gerez JA, Shi G, Zhou Q, Riek R, Nilsson KPR, Razansky D, Klohs J. Transcranial detection of tauopathy
in vivo
in P301L mice with high‐resolution large‐field multifocal illumination fluorescence microscopy. Alzheimers Dement 2020. [DOI: 10.1002/alz.047238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruiqing Ni
- ETH Zurich & University of Zurich Zurich Switzerland
| | - Zhenyue Chen
- ETH Zurich & University of Zurich Zurich Switzerland
| | | | - Gloria Shi
- ETH Zurich & University of Zurich Zurich Switzerland
| | - Quanyu Zhou
- ETH Zurich & University of Zurich Zurich Switzerland
| | | | - K Peter R Nilsson
- Department of Physics Chemistry and Biology Linköping University Linköping Sweden
| | | | - Jan Klohs
- ETH Zurich & University of Zurich Zurich Switzerland
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35
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Ni R, Chen Z, Shi G, Villois A, Zhou Q, Arosio P, Nitsch RM, Nilsson KPR, Klohs J, Razansky D. Transcranial detection of amyloid‐beta at single plaque resolution
in vivo
with large‐field multifocal illumination fluorescence microscopy. Alzheimers Dement 2020. [DOI: 10.1002/alz.036413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ruiqing Ni
- ETH Zurich & University of Zurich Zurich Switzerland
| | - Zhenyue Chen
- ETH Zurich & University of Zurich Zurich Switzerland
| | - Gloria Shi
- ETH Zurich & University of Zurich Zurich Switzerland
| | | | - Quanyu Zhou
- ETH Zurich & University of Zurich Zurich Switzerland
| | | | - Roger M. Nitsch
- University of Zurich Institute for Regenerative Medicine ‐ IREM Schlieren Switzerland
| | - K. Peter R. Nilsson
- Department of Physics Chemistry and Biology Linköping University Linköping Sweden
| | - Jan Klohs
- ETH Zurich & University of Zurich Zurich Switzerland
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36
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Sevillano AM, Aguilar-Calvo P, Kurt TD, Lawrence JA, Soldau K, Nam TH, Schumann T, Pizzo DP, Nyström S, Choudhury B, Altmeppen H, Esko JD, Glatzel M, Nilsson KPR, Sigurdson CJ. Prion protein glycans reduce intracerebral fibril formation and spongiosis in prion disease. J Clin Invest 2020; 130:1350-1362. [PMID: 31985492 DOI: 10.1172/jci131564] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/13/2019] [Indexed: 12/12/2022] Open
Abstract
Posttranslational modifications (PTMs) are common among proteins that aggregate in neurodegenerative disease, yet how PTMs impact the aggregate conformation and disease progression remains unclear. By engineering knockin mice expressing prion protein (PrP) lacking 2 N-linked glycans (Prnp180Q/196Q), we provide evidence that glycans reduce spongiform degeneration and hinder plaque formation in prion disease. Prnp180Q/196Q mice challenged with 2 subfibrillar, non-plaque-forming prion strains instead developed plaques highly enriched in ADAM10-cleaved PrP and heparan sulfate (HS). Intriguingly, a third strain composed of intact, glycophosphatidylinositol-anchored (GPI-anchored) PrP was relatively unchanged, forming diffuse, HS-deficient deposits in both the Prnp180Q/196Q and WT mice, underscoring the pivotal role of the GPI-anchor in driving the aggregate conformation and disease phenotype. Finally, knockin mice expressing triglycosylated PrP (Prnp187N) challenged with a plaque-forming prion strain showed a phenotype reversal, with a striking disease acceleration and switch from plaques to predominantly diffuse, subfibrillar deposits. Our findings suggest that the dominance of subfibrillar aggregates in prion disease is due to the replication of GPI-anchored prions, with fibrillar plaques forming from poorly glycosylated, GPI-anchorless prions that interact with extracellular HS. These studies provide insight into how PTMs impact PrP interactions with polyanionic cofactors, and highlight PTMs as a major force driving the prion disease phenotype.
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Affiliation(s)
| | | | - Timothy D Kurt
- Department of Pathology, UCSD, La Jolla, California, USA
| | | | - Katrin Soldau
- Department of Pathology, UCSD, La Jolla, California, USA
| | - Thu H Nam
- Department of Pathology, UCSD, La Jolla, California, USA
| | | | - Donald P Pizzo
- Department of Pathology, UCSD, La Jolla, California, USA
| | - Sofie Nyström
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - Biswa Choudhury
- Department of Cellular and Molecular Medicine, UCSD, La Jolla, California, USA
| | - Hermann Altmeppen
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jeffrey D Esko
- Department of Cellular and Molecular Medicine, UCSD, La Jolla, California, USA
| | - Markus Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - K Peter R Nilsson
- Department of Physics, Chemistry, and Biology, Linköping University, Linköping, Sweden
| | - Christina J Sigurdson
- Department of Pathology, UCSD, La Jolla, California, USA.,Department of Medicine, UCSD, La Jolla, California, USA.,Department of Pathology, Immunology, and Microbiology, UCD, Davis, California, USA
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37
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Bäck M, Selegård R, Todarwal Y, Nyström S, Norman P, Linares M, Hammarström P, Lindgren M, Nilsson KPR. Tyrosine Side-Chain Functionalities at Distinct Positions Determine the Chirooptical Properties and Supramolecular Structures of Pentameric Oligothiophenes. ChemistryOpen 2020; 9:1100-1108. [PMID: 33163327 PMCID: PMC7607451 DOI: 10.1002/open.202000144] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 09/23/2020] [Indexed: 11/06/2022] Open
Abstract
Control over the photophysical properties and molecular organization of π-conjugated oligothiophenes is essential to their use in organic electronics. Herein we synthesized and characterized a variety of anionic pentameric oligothiophenes with different substitution patterns of L- or D-tyrosine at distinct positions along the thiophene backbone. Spectroscopic, microscopic, and theoretical studies of L- or D-tyrosine substituted pentameric oligothiophene conjugates revealed the formation of optically active π-stacked self-assembled aggregates under acid conditions. The distinct photophysical characteristics, as well as the supramolecular structures of the assemblies, were highly influenced by the positioning of the L- or D-tyrosine moieties along the thiophene backbone. Overall, the obtained results clearly demonstrate how fundamental changes in the position of the enantiomeric side-chain functionalities greatly affect the optical properties as well as the architecture of the self-assembled supramolecular structures.
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Affiliation(s)
- Marcus Bäck
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpinSweden
| | - Robert Selegård
- Division of Biophysics and Bioengineering, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpingSweden
| | - Yogesh Todarwal
- Department of Theoretical Chemistry and BiologyKTH Royal Institute of TechnologySE-106 91StockholmSweden
| | - Sofie Nyström
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpinSweden
| | - Patrick Norman
- Department of Theoretical Chemistry and BiologyKTH Royal Institute of TechnologySE-106 91StockholmSweden
| | - Mathieu Linares
- Laboratory of Organic Electronics, ITNLinköping UniversitySE-601 74NorrköpingSweden
- Scientific Visualization group, ITNLinköping UniversitySE-601 74NorrköpingSweden
- Swedish e-Science Research Center (SeRC)Linköping University581 83LinköpingSweden
| | - Per Hammarström
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpinSweden
| | - Mikael Lindgren
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpinSweden
- Department of PhysicsNorwegian University of Science and Technology, Gløshaugen7491TrondheimNorway
| | - K. Peter R. Nilsson
- Division of Chemistry, Department of Physics, Chemistry and BiologyLinköping University581 83LinköpinSweden
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38
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Butina K, Tomac A, Choong FX, Shirani H, Nilsson KPR, Löffler S, Richter-Dahlfors A. Optotracing for selective fluorescence-based detection, visualization and quantification of live S. aureus in real-time. NPJ Biofilms Microbiomes 2020; 6:35. [PMID: 33037198 PMCID: PMC7547713 DOI: 10.1038/s41522-020-00150-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 04/30/2020] [Accepted: 09/10/2020] [Indexed: 11/09/2022] Open
Abstract
Methods for bacterial detection are needed to advance the infection research and diagnostics. Based on conformation-sensitive fluorescent tracer molecules, optotracing was recently established for dynamic detection and visualization of structural amyloids and polysaccharides in the biofilm matrix of gram-negative bacteria. Here, we extend the use of optotracing for detection of gram-positive bacteria, focussing on the clinically relevant opportunistic human pathogen Staphylococcus aureus. We identify a donor-acceptor-donor-type optotracer, whose binding-induced fluorescence enables real-time detection, quantification, and visualization of S. aureus in monoculture and when mixed with gram-negative Salmonella Enteritidis. An algorithm-based automated high-throughput screen of 1920 S. aureus transposon mutants recognized the cell envelope as the binding target, which was corroborated by super-resolution microscopy of bacterial cells and spectroscopic analysis of purified cell wall components. The binding event was essentially governed by hydrophobic interactions, which permitted custom-designed tuning of the binding selectivity towards S. aureus versus Enterococcus faecalis by appropriate selection of buffer conditions. Collectively this work demonstrates optotracing as an enabling technology relevant for any field of basic and applied research, where visualization and detection of S. aureus is needed.
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Affiliation(s)
- Karen Butina
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden
| | - Ana Tomac
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden
| | - Ferdinand X Choong
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden
| | - Hamid Shirani
- Department of Chemistry, IFM, Linköping University, SE-581 83, Linköping, Sweden
| | - K Peter R Nilsson
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Chemistry, IFM, Linköping University, SE-581 83, Linköping, Sweden
| | - Susanne Löffler
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden
| | - Agneta Richter-Dahlfors
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden. .,Department of Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden.
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39
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Stepanchuk A, Tahir W, Nilsson KPR, Schatzl HM, Stys PK. Early detection of prion protein aggregation with a fluorescent pentameric oligothiophene probe using spectral confocal microscopy. J Neurochem 2020; 156:1033-1048. [PMID: 32799317 DOI: 10.1111/jnc.15148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/14/2020] [Accepted: 07/31/2020] [Indexed: 11/30/2022]
Abstract
Misfolding of the prion protein (PrP) and templating of its pathological conformation onto cognate proteins causes a number of lethal disorders of central nervous system in humans and animals, such as Creutzfeldt-Jacob disease, chronic wasting disease and bovine spongiform encephalopathy. Structural rearrangement of PrPC into PrPSc promotes aggregation of misfolded proteins into β-sheet-rich fibrils, which can be visualized by conformationally sensitive fluorescent probes. Early detection of prion misfolding and deposition might provide useful insights into its pathophysiology. Pentameric formyl thiophene acetic acid (pFTAA) is a novel amyloid probe that was shown to sensitively detect various misfolded proteins, including PrP. Here, we compared sensitivity of pFTAA staining and spectral microscopy with conventional methods of prion detection in mouse brains infected with mouse-adapted 22L prions. pFTAA bound to prion deposits in mouse brain sections exhibited a red-shifted fluorescence emission spectrum, which quantitatively increased with disease progression. Small prion deposits were detected as early as 50 days post-inoculation, well before appearance of clinical signs. Moreover, we detected significant spectral shifts in the greater brain parenchyma as early as 25 days post-inoculation, rivaling the most sensitive conventional method (real-time quaking-induced conversion). These results showcase the potential of pFTAA staining combined with spectral imaging for screening of prion-infected tissue. Not only does this method have comparable sensitivity to established techniques, it is faster and technically simpler. Finally, this readout provides valuable information about the spatial distribution of prion aggregates across tissue in the earliest stages of infection, potentially providing valuable pathophysiological insight into prion transmission.
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Affiliation(s)
- Anastasiia Stepanchuk
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Waqas Tahir
- Calgary Prion Research Unit, Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Hermann M Schatzl
- Calgary Prion Research Unit, Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Peter K Stys
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
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40
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Ni R, Chen Z, Gerez JA, Shi G, Zhou Q, Riek R, Nilsson KPR, Razansky D, Klohs J. Detection of cerebral tauopathy in P301L mice using high-resolution large-field multifocal illumination fluorescence microscopy. Biomed Opt Express 2020; 11:4989-5002. [PMID: 33014595 PMCID: PMC7510859 DOI: 10.1364/boe.395803] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/23/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
Current intravital microscopy techniques visualize tauopathy with high-resolution, but have a small field-of-view and depth-of-focus. Herein, we report a transcranial detection of tauopathy over the entire cortex of P301L tauopathy mice using large-field multifocal illumination (LMI) fluorescence microscopy technique and luminescent conjugated oligothiophenes. In vitro assays revealed that fluorescent ligand h-FTAA is optimal for in vivo tau imaging, which was confirmed by observing elevated probe retention in the cortex of P301L mice compared to non-transgenic littermates. Immunohistochemical staining further verified the specificity of h-FTAA to detect tauopathy in P301L mice. The new imaging platform can be leveraged in pre-clinical mechanistic studies of tau spreading and clearance as well as longitudinal monitoring of tau targeting therapeutics.
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Affiliation(s)
- Ruiqing Ni
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
- University of Zurich, Zurich Neuroscience Center, Zurich, Switzerland
| | - Zhenyue Chen
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
- University of Zurich, Faculty of Medicine and Institute of Pharmacology and Toxicology, Zurich, Switzerland
| | - Juan A. Gerez
- ETH Zurich, Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, Zurich, Switzerland
| | - Gloria Shi
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
| | - Quanyu Zhou
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
- University of Zurich, Faculty of Medicine and Institute of Pharmacology and Toxicology, Zurich, Switzerland
| | - Roland Riek
- ETH Zurich, Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, Zurich, Switzerland
| | - K. Peter R. Nilsson
- Linköping University, Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping, Sweden
| | - Daniel Razansky
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
- University of Zurich, Zurich Neuroscience Center, Zurich, Switzerland
- University of Zurich, Faculty of Medicine and Institute of Pharmacology and Toxicology, Zurich, Switzerland
| | - Jan Klohs
- University of Zurich & ETH Zurich, Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, Wolfgang-Pauli-strasse 27 HIT E22.4, 8093, Zurich, Switzerland
- University of Zurich, Zurich Neuroscience Center, Zurich, Switzerland
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41
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Tanriöver G, Bacioglu M, Schweighauser M, Mahler J, Wegenast-Braun BM, Skodras A, Obermüller U, Barth M, Kronenberg-Versteeg D, Nilsson KPR, Shimshek DR, Kahle PJ, Eisele YS, Jucker M. Prominent microglial inclusions in transgenic mouse models of α-synucleinopathy that are distinct from neuronal lesions. Acta Neuropathol Commun 2020; 8:133. [PMID: 32787922 PMCID: PMC7425556 DOI: 10.1186/s40478-020-00993-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/09/2020] [Indexed: 11/29/2023] Open
Abstract
Alpha-synucleinopathies are a group of progressive neurodegenerative disorders, characterized by intracellular deposits of aggregated α-synuclein (αS). The clinical heterogeneity of these diseases is thought to be attributed to conformers (or strains) of αS but the contribution of inclusions in various cell types is unclear. The aim of the present work was to study αS conformers among different transgenic (TG) mouse models of α-synucleinopathies. To this end, four different TG mouse models were studied (Prnp-h[A53T]αS; Thy1-h[A53T]αS; Thy1-h[A30P]αS; Thy1-mαS) that overexpress human or murine αS and differed in their age-of-symptom onset and subsequent disease progression. Postmortem analysis of end-stage brains revealed robust neuronal αS pathology as evidenced by accumulation of αS serine 129 (p-αS) phosphorylation in the brainstem of all four TG mouse lines. Overall appearance of the pathology was similar and only modest differences were observed among additionally affected brain regions. To study αS conformers in these mice, we used pentameric formyl thiophene acetic acid (pFTAA), a fluorescent dye with amyloid conformation-dependent spectral properties. Unexpectedly, besides the neuronal αS pathology, we also found abundant pFTAA-positive inclusions in microglia of all four TG mouse lines. These microglial inclusions were also positive for Thioflavin S and showed immunoreactivity with antibodies recognizing the N-terminus of αS, but were largely p-αS-negative. In all four lines, spectral pFTAA analysis revealed conformational differences between microglia and neuronal inclusions but not among the different mouse models. Concomitant with neuronal lesions, microglial inclusions were already present at presymptomatic stages and could also be induced by seeded αS aggregation. Although nature and significance of microglial inclusions for human α-synucleinopathies remain to be clarified, the previously overlooked abundance of microglial inclusions in TG mouse models of α-synucleinopathy bears importance for mechanistic and preclinical-translational studies.
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42
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Lantz L, Shirani H, Klingstedt T, Nilsson KPR. Synthesis and Characterization of Thiophene-based Donor-Acceptor-Donor Heptameric Ligands for Spectral Assignment of Polymorphic Amyloid-β Deposits. Chemistry 2020; 26:7425-7432. [PMID: 32022335 PMCID: PMC7318160 DOI: 10.1002/chem.201905612] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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] [Received: 12/12/2019] [Indexed: 11/29/2022]
Abstract
Protein deposits are associated with many devastating diseases and fluorescent ligands able to visualize these pathological entities are essential. Here, we report the synthesis of thiophene‐based donor–acceptor–donor heptameric ligands that can be utilized for spectral assignment of distinct amyloid‐β (Aβ) aggregates, one of the pathological hallmarks in Alzheimer's disease. The ability of the ligands to selectively distinguish Aβ deposits was abolished when the chemical composition of the ligands was altered. Our findings provide the structural and functional basis for the development of new fluorescent ligands that can distinguish between aggregated proteinaceous species consisting of the same peptide or protein. In addition, such ligands might aid in interpreting the potential role of polymorphic Aβ deposits in the pathogenesis of Alzheimer's disease.
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Affiliation(s)
- Linda Lantz
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Hamid Shirani
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Therése Klingstedt
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
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43
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Shahnawaz M, Mukherjee A, Pritzkow S, Mendez N, Rabadia P, Liu X, Hu B, Schmeichel A, Singer W, Wu G, Tsai AL, Shirani H, Nilsson KPR, Low PA, Soto C. Discriminating α-synuclein strains in Parkinson's disease and multiple system atrophy. Nature 2020; 578:273-277. [PMID: 32025029 PMCID: PMC7066875 DOI: 10.1038/s41586-020-1984-7] [Citation(s) in RCA: 404] [Impact Index Per Article: 101.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/10/2020] [Indexed: 01/15/2023]
Abstract
Synucleinopathies are neurodegenerative diseases that are associated with the misfolding and aggregation of α-synuclein, including Parkinson's disease, dementia with Lewy bodies and multiple system atrophy1. Clinically, it is challenging to differentiate Parkinson's disease and multiple system atrophy, especially at the early stages of disease2. Aggregates of α-synuclein in distinct synucleinopathies have been proposed to represent different conformational strains of α-synuclein that can self-propagate and spread from cell to cell3-6. Protein misfolding cyclic amplification (PMCA) is a technique that has previously been used to detect α-synuclein aggregates in samples of cerebrospinal fluid with high sensitivity and specificity7,8. Here we show that the α-synuclein-PMCA assay can discriminate between samples of cerebrospinal fluid from patients diagnosed with Parkinson's disease and samples from patients with multiple system atrophy, with an overall sensitivity of 95.4%. We used a combination of biochemical, biophysical and biological methods to analyse the product of α-synuclein-PMCA, and found that the characteristics of the α-synuclein aggregates in the cerebrospinal fluid could be used to readily distinguish between Parkinson's disease and multiple system atrophy. We also found that the properties of aggregates that were amplified from the cerebrospinal fluid were similar to those of aggregates that were amplified from the brain. These findings suggest that α-synuclein aggregates that are associated with Parkinson's disease and multiple system atrophy correspond to different conformational strains of α-synuclein, which can be amplified and detected by α-synuclein-PMCA. Our results may help to improve our understanding of the mechanism of α-synuclein misfolding and the structures of the aggregates that are implicated in different synucleinopathies, and may also enable the development of a biochemical assay to discriminate between Parkinson's disease and multiple system atrophy.
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Affiliation(s)
- Mohammad Shahnawaz
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Abhisek Mukherjee
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Sandra Pritzkow
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Nicolas Mendez
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Prakruti Rabadia
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Xiangan Liu
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Bo Hu
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Ann Schmeichel
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | | | - Gang Wu
- Division of Hematology, Department of Internal Medicine, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Ah-Lim Tsai
- Division of Hematology, Department of Internal Medicine, University of Texas McGovern Medical School at Houston, Houston, TX, USA
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Phillip A Low
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Claudio Soto
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas McGovern Medical School at Houston, Houston, TX, USA.
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44
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Peelaerts W, Bergkvist L, George S, Johnson M, Meyerdirk L, Schulz E, Steiner JA, Madaj Z, Ma J, Becker K, Nilsson KPR, Colca JR, Brundin P. Inhibiting the mitochondrial pyruvate carrier does not ameliorate synucleinopathy in the absence of inflammation or metabolic deficits. Free Neuropathol 2020; 1. [PMID: 35224554 PMCID: PMC8870797 DOI: 10.17879/freeneuropathology-2020-3049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Epidemiological studies suggest a link between type-2 diabetes and Parkinson’s disease (PD) risk. Treatment of type-2 diabetes with insulin sensitizing drugs lowers the risk of PD. We previously showed that the insulin sensitizing drug, MSDC-0160, ameliorates pathogenesis in some animal models of PD. MSDC-0160 reversibly binds the mitochondrial pyruvate carrier (MPC) protein complex, which has an anti-inflammatory effect and restores metabolic deficits. Since PD is characterized by the deposition of α-synuclein (αSyn), we hypothesized that inhibiting the MPC might directly inhibit αSyn aggregation in vivo in mammals. To answer if modulation of MPC can reduce the development of αSyn assemblies, and reduce neurodegeneration, we treated two chronic and progressive mouse models; a viral vector-based αSyn overexpressing model and a pre-formed fibril (PFF) αSyn seeding model with MSDC-0160. These two models present distinct types of αSyn pathology but lack inflammatory or autophagy deficits. Contrary to our hypothesis, we found that a modulation of MPC in these models did not reduce the accumulation of αSyn aggregates or mitigate neurotoxicity. Instead, MSDC-0160 changed the post-translational modification and aggregation features of αSyn. These results are consistent with the lack of a direct effect of MPC modulation on synuclein clearance in these models.
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Affiliation(s)
- Wouter Peelaerts
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA.,KU Leuven, Laboratory for Neurobiology and Gene Therapy, Dept. of Neurosciences, Leuven, Belgium
| | - Liza Bergkvist
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Sonia George
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Michaela Johnson
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Lindsay Meyerdirk
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Emily Schulz
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Jennifer A Steiner
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Zachary Madaj
- Bioinformatics and Biostatistics Core, Van Andel Institute, Grand Rapids, MI, USA
| | - Jiyan Ma
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Katelyn Becker
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
| | - Jerry R Colca
- Metabolic Solutions Development Company, Kalamazoo, MI, USA
| | - Patrik Brundin
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
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45
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Klingstedt T, Ghetti B, Holton JL, Ling H, Nilsson KPR, Goedert M. Luminescent conjugated oligothiophenes distinguish between α-synuclein assemblies of Parkinson's disease and multiple system atrophy. Acta Neuropathol Commun 2019; 7:193. [PMID: 31796099 PMCID: PMC6892142 DOI: 10.1186/s40478-019-0840-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 10/29/2019] [Indexed: 12/11/2022] Open
Abstract
Synucleinopathies [Parkinson’s disease with or without dementia, dementia with Lewy bodies and multiple system atrophy] are neurodegenerative diseases that are defined by the presence of filamentous α-synuclein inclusions. We investigated the ability of luminescent conjugated oligothiophenes to stain the inclusions of Parkinson’s disease and multiple system atrophy. They stained the Lewy pathology of Parkinson’s disease and the glial cytoplasmic inclusions of multiple system atrophy. Spectral analysis of HS-68-stained inclusions showed a red shift in multiple system atrophy, but the difference with Parkinson’s disease was not significant. However, when inclusions were double-labelled for HS-68 and an antibody specific for α-synuclein phosphorylated at S129, they could be distinguished based on colour shifts with blue designated for Parkinson’s disease and red for multiple system atrophy. The inclusions of Parkinson’s disease and multiple system atrophy could also be distinguished using fluorescence lifetime imaging. These findings are consistent with the presence of distinct conformers of assembled α-synuclein in Parkinson’s disease and multiple system atrophy.
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46
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Calvo-Rodriguez M, Hou SS, Snyder AC, Dujardin S, Shirani H, Nilsson KPR, Bacskai BJ. In vivo detection of tau fibrils and amyloid β aggregates with luminescent conjugated oligothiophenes and multiphoton microscopy. Acta Neuropathol Commun 2019; 7:171. [PMID: 31703739 PMCID: PMC6839235 DOI: 10.1186/s40478-019-0832-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [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: 09/09/2019] [Accepted: 10/21/2019] [Indexed: 12/17/2022] Open
Abstract
The detection of amyloid beta deposits and neurofibrillary tangles, both hallmarks of Alzheimer's disease (AD), is key to understanding the mechanisms underlying these pathologies. Luminescent conjugated oligothiophenes (LCOs) enable fluorescence imaging of these protein aggregates. Using LCOs and multiphoton microscopy, individual tangles and amyloid beta deposits were labeled in vivo and imaged longitudinally in a mouse model of tauopathy and cerebral amyloidosis, respectively. Importantly, LCO HS-84, whose emission falls in the green region of the spectrum, allowed for the first time longitudinal imaging of tangle dynamics following a single intravenous injection. In addition, LCO HS-169, whose emission falls in the red region of the spectrum, successfully labeled amyloid beta deposits, allowing multiplexing with other reporters whose emission falls in the green region of the spectrum. In conclusion, this method can provide a new approach for longitudinal in vivo imaging using multiphoton microscopy of AD pathologies as well as other neurodegenerative diseases associated with protein aggregation in mouse models.
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Affiliation(s)
- Maria Calvo-Rodriguez
- Alzheimer Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16th St, Charlestown, MA 02129 USA
| | - Steven S. Hou
- Alzheimer Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16th St, Charlestown, MA 02129 USA
| | - Austin C. Snyder
- Alzheimer Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16th St, Charlestown, MA 02129 USA
| | - Simon Dujardin
- Alzheimer Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16th St, Charlestown, MA 02129 USA
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - K. Peter R. Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Brian J. Bacskai
- Alzheimer Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 114, 16th St, Charlestown, MA 02129 USA
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47
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Wang B, Queenan BN, Wang S, Nilsson KPR, Bazan GC. Precisely Defined Conjugated Oligoelectrolytes for Biosensing and Therapeutics. Adv Mater 2019; 31:e1806701. [PMID: 30698856 DOI: 10.1002/adma.201806701] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [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: 10/16/2018] [Revised: 11/25/2018] [Indexed: 06/09/2023]
Abstract
Conjugated oligoelectrolytes (COEs) are a relatively new class of synthetic organic molecules with, as of yet, untapped potential for use in organic optoelectronic devices and bioelectronic systems. COEs also offer a novel molecular approach to biosensing, bioimaging, and disease therapy. Substantial progress has been made in the past decade at the intersection of chemistry, materials science, and the biological sciences developing COEs and their polymer analogues, namely, conjugated polyelectrolytes (CPEs), into synthetic systems with biological and biomedical utility. CPEs have traditionally attracted more attention in arenas of sensing, imaging, and therapy. However, the precisely defined molecular structures and interactions of COEs offer potential key advantages over CPEs, including higher reliability and fluorescence quantum efficiency, larger diversity of subcellular targeting strategies, and improved selectivity to biomolecules. Here, the unique-and sometimes overlooked-properties of COEs are discussed and the noticeable progress in their use for biological sensing, imaging, and therapy is reviewed.
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Affiliation(s)
- Bing Wang
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Bridget N Queenan
- Department of Mechanical Engineering, Neuroscience Research Institute, University of California, Santa Barbara, CA, 93106, USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, Linköping, SE, -581 83, Sweden
| | - Guillermo C Bazan
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
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48
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Löffler S, Antypas H, Choong FX, Nilsson KPR, Richter-Dahlfors A. Conjugated Oligo- and Polymers for Bacterial Sensing. Front Chem 2019; 7:265. [PMID: 31058140 PMCID: PMC6482434 DOI: 10.3389/fchem.2019.00265] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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] [Received: 02/01/2019] [Accepted: 04/01/2019] [Indexed: 11/29/2022] Open
Abstract
Fast and accurate detection of bacteria and differentiation between pathogenic and commensal colonization are important keys in preventing the emergence and spread of bacterial resistance toward antibiotics. As bacteria undergo major lifestyle changes during colonization, bacterial sensing needs to be achieved on different levels. In this review, we describe how conjugated oligo- and polymers are used to detect bacterial colonization. We summarize how oligothiophene derivatives have been tailor-made for detection of biopolymers produced by a wide range of bacteria upon entering the biofilm lifestyle. We further describe how these findings are translated into diagnostic approaches for biofilm-related infections. Collectively, this provides an overview on how synthetic biorecognition elements can be used to produce fast and easy diagnostic tools and new methods for infection control.
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Affiliation(s)
- Susanne Löffler
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | - Haris Antypas
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | - Ferdinand X. Choong
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | | | - Agneta Richter-Dahlfors
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
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49
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Michno W, Nyström S, Wehrli P, Lashley T, Brinkmalm G, Guerard L, Syvänen S, Sehlin D, Kaya I, Brinet D, Nilsson KPR, Hammarström P, Blennow K, Zetterberg H, Hanrieder J. Pyroglutamation of amyloid-βx-42 (Aβx-42) followed by Aβ1-40 deposition underlies plaque polymorphism in progressing Alzheimer's disease pathology. J Biol Chem 2019; 294:6719-6732. [PMID: 30814252 PMCID: PMC6497931 DOI: 10.1074/jbc.ra118.006604] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [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] [Received: 11/07/2018] [Revised: 02/21/2019] [Indexed: 12/20/2022] Open
Abstract
Amyloid-β (Aβ) pathology in Alzheimer's disease (AD) is characterized by the formation of polymorphic deposits comprising diffuse and cored plaques. Because diffuse plaques are predominantly observed in cognitively unaffected, amyloid-positive (CU-AP) individuals, pathogenic conversion into cored plaques appears to be critical to AD pathogenesis. Herein, we identified the distinct Aβ species associated with amyloid polymorphism in brain tissue from individuals with sporadic AD (s-AD) and CU-AP. To this end, we interrogated Aβ polymorphism with amyloid conformation–sensitive dyes and a novel in situ MS paradigm for chemical characterization of hyperspectrally delineated plaque morphotypes. We found that maturation of diffuse into cored plaques correlated with increased Aβ1–40 deposition. Using spatial in situ delineation with imaging MS (IMS), we show that Aβ1–40 aggregates at the core structure of mature plaques, whereas Aβ1–42 localizes to diffuse amyloid aggregates. Moreover, we observed that diffuse plaques have increased pyroglutamated Aβx-42 levels in s-AD but not CU-AP, suggesting an AD pathology–related, hydrophobic functionalization of diffuse plaques facilitating Aβ1–40 deposition. Experiments in tgAPPSwe mice verified that, similar to what has been observed in human brain pathology, diffuse deposits display higher levels of Aβ1–42 and that Aβ plaque maturation over time is associated with increases in Aβ1–40. Finally, we found that Aβ1–40 deposition is characteristic for cerebral amyloid angiopathy deposition and maturation in both humans and mice. These results indicate that N-terminal Aβx-42 pyroglutamation and Aβ1–40 deposition are critical events in priming and maturation of pathogenic Aβ from diffuse into cored plaques, underlying neurotoxic plaque development in AD.
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Affiliation(s)
- Wojciech Michno
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden
| | - Sofie Nyström
- the Department of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden
| | - Patrick Wehrli
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden
| | - Tammaryn Lashley
- the Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, United Kingdom
| | - Gunnar Brinkmalm
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden
| | - Laurent Guerard
- the Center for Cellular Imaging, Core Facilities, Sahlgrenska Academy at the University of Gothenburg, 41390 Gothenburg, Sweden
| | - Stina Syvänen
- the Department of Public Health and Caring Sciences, Uppsala University, 75236 Uppsala, Sweden
| | - Dag Sehlin
- the Department of Public Health and Caring Sciences, Uppsala University, 75236 Uppsala, Sweden
| | - Ibrahim Kaya
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden
| | - Dimitri Brinet
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden
| | - K Peter R Nilsson
- the Department of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden
| | - Per Hammarström
- the Department of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden
| | - Kaj Blennow
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden.,the Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, 43180 Mölndal, Sweden
| | - Henrik Zetterberg
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden.,the Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, United Kingdom.,the Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, 43180 Mölndal, Sweden.,the UK Dementia Research Institute at UCL, London WC1E 6BT, United Kingdom, and
| | - Jörg Hanrieder
- From the Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, 43180 Mölndal, Sweden, .,the Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, United Kingdom
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50
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Rouhbakhsh Z, Aili D, Martinsson E, Svärd A, Bäck M, Housaindokht MR, Nilsson KPR, Selegård R. Self-Assembly of a Structurally Defined Chiro-Optical Peptide-Oligothiophene Hybrid Material. ACS Omega 2018; 3:15066-15075. [PMID: 31458172 PMCID: PMC6643387 DOI: 10.1021/acsomega.8b02153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 10/12/2018] [Indexed: 06/10/2023]
Abstract
Conducting polymers are routinely used in optoelectronic biomaterials, but large polymer polydispersity and poor aqueous compatibility complicate integration with biomolecular templates and development of discrete and defined supramolecular complexes. Herein, we report on a chiro-optical hybrid material generated by the self-assembly of an anionic peptide and a chemically defined cationic pentameric thiophene in aqueous environment. The peptide acts as a stereochemical template for the thiophene and adopts an α-helical conformation upon association, inducing optical activity in the thiophene π-π* transition region. Theoretical calculations confirm the experimentally observed induced structural changes and indicate the importance of electrostatic interactions in the complex. The association process is also probed at the substrate-solvent interface using peptide-functionalized gold nanoparticles, indicating that the peptide can also act as a scaffold when immobilized, resulting in structurally well-defined supramolecular complexes. The hybrid complex could rapidly be assembled, and the kinetics of the formation could be monitored by utilizing the local surface plasmon resonance originating from the gold nanoparticles. We foresee that these findings will aid in designing novel hybrid materials and provide a possible route for the development of functional optoelectronic interfaces for both biomaterials and energy harvesting applications.
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Affiliation(s)
- Zeinab Rouhbakhsh
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
- Biophysical
Chemistry Laboratory, Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, 91775-1436 Mashhad, Iran
| | - Daniel Aili
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
| | - Erik Martinsson
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
| | - Anna Svärd
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
| | - Marcus Bäck
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
| | - Mohammad R. Housaindokht
- Biophysical
Chemistry Laboratory, Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, 91775-1436 Mashhad, Iran
| | - K. Peter R. Nilsson
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
| | - Robert Selegård
- Laboratory
of Molecular Materials, Division of Molecular Physics,
Department of Physics, Chemistry and Biology, and Division of Chemistry, Department
of Physics, Chemistry and Biology, Linköping
University, 581 83 Linköping, Sweden
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