1
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Galan-Acosta L, Sierra C, Leppert A, Pouliopoulos AN, Kwon N, Noel RL, Tambaro S, Presto J, Nilsson P, Konofagou EE, Johansson J. Recombinant BRICHOS chaperone domains delivered to mouse brain parenchyma by focused ultrasound and microbubbles are internalized by hippocampal and cortical neurons. Mol Cell Neurosci 2020; 105:103498. [PMID: 32389804 DOI: 10.1016/j.mcn.2020.103498] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 04/30/2020] [Accepted: 05/02/2020] [Indexed: 02/08/2023] Open
Abstract
The BRICHOS domain is found in human precursor proteins associated with cancer, dementia (Bri2) and amyloid lung disease (proSP-C). Recombinant human (rh) proSP-C and Bri2 BRICHOS domains delay amyloid-β peptide (Aβ) fibril formation and reduce associated toxicity in vitro and their overexpression reduces Aβ neurotoxicity in animal models of Alzheimer's disease. After intravenous administration in wild-type mice, rh Bri2, but not proSP-C, BRICHOS was detected in the brain parenchyma, suggesting that Bri2 BRICHOS selectively bypasses the blood-brain barrier (BBB). Here, our objective was to increase the brain delivery of rh proSP-C (trimer of 18 kDa subunits) and Bri2 BRICHOS (monomer to oligomer of 15 kDa subunits) using focused ultrasound combined with intravenous microbubbles (FUS + MB), which enables targeted and transient opening of the BBB. FUS + MB was targeted to one hemisphere of wild type mice and BBB opening in the hippocampal region was confirmed by magnetic resonance imaging. Two hours after FUS + MB brain histology showed no signs of tissue damage and immunohistochemistry showed abundant delivery to the brain parenchyma in 13 out of 16 cases given 10 mg/kg of proSP-C or Bri2 BRICHOS domains. The Bri2, but not proSP-C BRICHOS domain was detected also in the non-targeted hemisphere. ProSP-C and Bri2 BRICHOS domains were taken up by a subset of neurons in the hippocampus and cortex, and were detected to a minor extent in early endosomes. These results indicate that rh Bri2, but not proSP-C, BRICHOS, can be efficiently delivered into the mouse brain parenchyma and that both BRICHOS domains can be internalized by cell-specific mechanisms.
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Affiliation(s)
- L Galan-Acosta
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - C Sierra
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, NY, New York, USA
| | - A Leppert
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - A N Pouliopoulos
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, NY, New York, USA
| | - N Kwon
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, NY, New York, USA
| | - R L Noel
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, NY, New York, USA
| | - S Tambaro
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - J Presto
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - P Nilsson
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - E E Konofagou
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, NY, New York, USA; Department of Radiology, Columbia University, NY, New York, USA
| | - J Johansson
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden.
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2
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Tambaro S, Galan-Acosta L, Leppert A, Chen G, Biverstål H, Presto J, Nilsson P, Johansson J. Blood-brain and blood-cerebrospinal fluid passage of BRICHOS domains from two molecular chaperones in mice. J Biol Chem 2018; 294:2606-2615. [PMID: 30598503 DOI: 10.1074/jbc.ra118.004538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 12/19/2018] [Indexed: 12/20/2022] Open
Abstract
Targeting toxicity associated with β-amyloid (Aβ) misfolding and aggregation is a promising therapeutic strategy for preventing or managing Alzheimer's disease. The BRICHOS domains from human prosurfactant protein C (proSP-C) and integral membrane protein 2B (Bri2) efficiently reduce neurotoxicity associated with Aβ42 fibril formation both in vitro and in vivo In this study, we evaluated the serum half-lives and permeability into the brain and cerebrospinal fluid (CSF) of recombinant human (rh) proSP-C and Bri2 BRICHOS domains injected intravenously into WT mice. We found that rh proSP-C BRICHOS has a longer blood serum half-life compared with rh Bri2 BRICHOS and passed into the CSF but not into the brain parenchyma. As judged by Western blotting, immunohistochemistry, and ELISA, rh Bri2 BRICHOS passed into both the CSF and brain. Intracellular immunostaining for rh Bri2 BRICHOS was observed in the choroid plexus epithelium as well as in the cerebral cortex. Our results indicate that intravenously administered rh proSP-C and Bri2 BRICHOS domains have different pharmacokinetic properties and blood-brain/blood-CSF permeability in mice. The finding that rh Bri2 BRICHOS can reach the brain parenchyma after peripheral administration may be harnessed in the search for new therapeutic strategies for managing Alzheimer's disease.
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Affiliation(s)
- Simone Tambaro
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Lorena Galan-Acosta
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Axel Leppert
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Gefei Chen
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Henrik Biverstål
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Jenny Presto
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Per Nilsson
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
| | - Jan Johansson
- From the Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141 83 Huddinge, Sweden
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3
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Dolfe L, Tambaro S, Tigro H, Del Campo M, Hoozemans JJM, Wiehager B, Graff C, Winblad B, Ankarcrona M, Kaldmäe M, Teunissen CE, Rönnbäck A, Johansson J, Presto J. The Bri2 and Bri3 BRICHOS Domains Interact Differently with Aβ 42 and Alzheimer Amyloid Plaques. J Alzheimers Dis Rep 2018; 2:27-39. [PMID: 30480246 PMCID: PMC6159705 DOI: 10.3233/adr-170051] [Citation(s) in RCA: 21] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Alzheimer’s disease (AD) is the most common form of dementia and there is no successful treatment available. Evidence suggests that fibril formation of the amyloid β-peptide (Aβ) is a major underlying cause of AD, and treatment strategies that reduce the toxic effects of Aβ amyloid are sought for. The BRICHOS domain is found in several proteins, including Bri2 (also called integral membrane protein 2B (ITM2B)), mutants of which are associated with amyloid and neurodegeneration, and Bri3 (ITM2C). We have used mouse hippocampal neurons and brain tissues from mice and humans and show Bri3 deposits dispersed on AD plaques. In contrast to what has been shown for Bri2, Bri3 immunoreactivity is decreased in AD brain homogenates compared to controls. Both Bri2 and Bri3 BRICHOS domains interact with Aβ40 and Aβ42 present in neurons and reduce Aβ42 amyloid fibril formation in vitro, but Bri3 BRICHOS is less efficient. These results indicate that Bri2 and Bri3 BRICHOS have different roles in relation to Aβ aggregation.
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Affiliation(s)
- Lisa Dolfe
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Simone Tambaro
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Helene Tigro
- School of Natural Sciences and Health, Tallinn University, Tallinn, Estonia
| | - Marta Del Campo
- Department of Clinical Chemistry, VU University Medical Center, Amsterdam, The Netherlands
| | - Jeroen J M Hoozemans
- Neurochemistry Lab, Department of Clinical Chemistry, Amsterdam Neuroscience, VU University Medical Center, The Netherlands
| | - Birgitta Wiehager
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Caroline Graff
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden.,Genetic Unit, Theme Aging, Karolinska University Hospital, Sweden
| | - Bengt Winblad
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Maria Ankarcrona
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Margit Kaldmäe
- School of Natural Sciences and Health, Tallinn University, Tallinn, Estonia
| | - Charlotte E Teunissen
- Department of Clinical Chemistry, VU University Medical Center, Amsterdam, The Netherlands
| | - Annica Rönnbäck
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
| | - Jan Johansson
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden.,School of Natural Sciences and Health, Tallinn University, Tallinn, Estonia
| | - Jenny Presto
- Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Huddinge, Sweden
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4
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Vincenz-Donnelly L, Holthusen H, Körner R, Hansen EC, Presto J, Johansson J, Sawarkar R, Hartl FU, Hipp MS. High capacity of the endoplasmic reticulum to prevent secretion and aggregation of amyloidogenic proteins. EMBO J 2018; 37:337-350. [PMID: 29247078 PMCID: PMC5793802 DOI: 10.15252/embj.201695841] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 10/06/2016] [Revised: 10/19/2017] [Accepted: 10/25/2017] [Indexed: 01/09/2023] Open
Abstract
Protein aggregation is associated with neurodegeneration and various other pathologies. How specific cellular environments modulate the aggregation of disease proteins is not well understood. Here, we investigated how the endoplasmic reticulum (ER) quality control system handles β-sheet proteins that were designed de novo to form amyloid-like fibrils. While these proteins undergo toxic aggregation in the cytosol, we find that targeting them to the ER (ER-β) strongly reduces their toxicity. ER-β is retained within the ER in a soluble, polymeric state, despite reaching very high concentrations exceeding those of ER-resident molecular chaperones. ER-β is not removed by ER-associated degradation (ERAD) but interferes with ERAD of other proteins. These findings demonstrate a remarkable capacity of the ER to prevent the formation of insoluble β-aggregates and the secretion of potentially toxic protein species. Our results also suggest a generic mechanism by which proteins with exposed β-sheet structure in the ER interfere with proteostasis.
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Affiliation(s)
- Lisa Vincenz-Donnelly
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Hauke Holthusen
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Roman Körner
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Erik C Hansen
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Jenny Presto
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Centre for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - Jan Johansson
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Centre for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - Ritwick Sawarkar
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - F Ulrich Hartl
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Mark S Hipp
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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5
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Chen G, Abelein A, Nilsson HE, Leppert A, Andrade-Talavera Y, Tambaro S, Hemmingsson L, Roshan F, Landreh M, Biverstål H, Koeck PJB, Presto J, Hebert H, Fisahn A, Johansson J. Bri2 BRICHOS client specificity and chaperone activity are governed by assembly state. Nat Commun 2017; 8:2081. [PMID: 29234026 PMCID: PMC5727130 DOI: 10.1038/s41467-017-02056-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [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: 07/06/2017] [Accepted: 11/02/2017] [Indexed: 11/09/2022] Open
Abstract
Protein misfolding and aggregation is increasingly being recognized as a cause of disease. In Alzheimer’s disease the amyloid-β peptide (Aβ) misfolds into neurotoxic oligomers and assembles into amyloid fibrils. The Bri2 protein associated with Familial British and Danish dementias contains a BRICHOS domain, which reduces Aβ fibrillization as well as neurotoxicity in vitro and in a Drosophila model, but also rescues proteins from irreversible non-fibrillar aggregation. How these different activities are mediated is not known. Here we show that Bri2 BRICHOS monomers potently prevent neuronal network toxicity of Aβ, while dimers strongly suppress Aβ fibril formation. The dimers assemble into high-molecular-weight oligomers with an apparent two-fold symmetry, which are efficient inhibitors of non-fibrillar protein aggregation. These results indicate that Bri2 BRICHOS affects qualitatively different aspects of protein misfolding and toxicity via different quaternary structures, suggesting a means to generate molecular chaperone diversity. The BRICHOS domain is a chaperone that can act against amyloid-β peptide fibril formation and non-fibrillar protein aggregation. Here the authors use a multidisciplinary approach and show that the Bri2 BRICHOS domain has qualitatively different chaperone activities depending on its quaternary structure.
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Affiliation(s)
- Gefei Chen
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Axel Abelein
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Harriet E Nilsson
- Department of Biosciences and Nutrition, Karolinska Institutet, and School of Technology and Health, KTH Royal institute of Technology, 141 83, Huddinge, Sweden
| | - Axel Leppert
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Yuniesky Andrade-Talavera
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Neuronal Oscillations Lab, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Simone Tambaro
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Lovisa Hemmingsson
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden.,Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Firoz Roshan
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Neuronal Oscillations Lab, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Michael Landreh
- Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 5QY, UK.,Science for Life Laboratory, Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet, Tomtebodavägen 23 A, 171 65, Stockholm, Sweden
| | - Henrik Biverstål
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden.,Department of Physical Organic Chemistry, Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV, 1006, Latvia
| | - Philip J B Koeck
- Department of Biosciences and Nutrition, Karolinska Institutet, and School of Technology and Health, KTH Royal institute of Technology, 141 83, Huddinge, Sweden
| | - Jenny Presto
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Hans Hebert
- Department of Biosciences and Nutrition, Karolinska Institutet, and School of Technology and Health, KTH Royal institute of Technology, 141 83, Huddinge, Sweden
| | - André Fisahn
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Neuronal Oscillations Lab, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Jan Johansson
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 141 57, Huddinge, Sweden.
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6
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Kim J, Kim C, Dolfe L, Belmonte K, Flores L, Kurti A, Fryer JD, Presto J, Johansson J. [P4–125]: THE MOLECULAR CHAPERONE BRICHOS INHIBITS Aβ AGGREGATION AND OTHER NEUROPATHOLOGICAL PHENOTYPES IN A MOUSE MODEL OF Aβ AMYLOIDOSIS. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.1991] [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: 11/29/2022]
Affiliation(s)
- Jungsu Kim
- Mayo Clinic College of MedicineJacksonvilleFLUSA
| | | | | | | | - Luis Flores
- Mayo Clinic College of MedicineJacksonvilleFLUSA
| | - Aishe Kurti
- Mayo Clinic College of MedicineJacksonvilleFLUSA
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7
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Tambaro S, Galán-Acosta L, Leppert A, Presto J, Johansson J. BRICHOS - an anti-amyloid chaperone: evaluation of blood-brain barrier permeability of Bri2 BRICHOS. Amyloid 2017; 24:7-8. [PMID: 28434300 DOI: 10.1080/13506129.2016.1272451] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Simone Tambaro
- a Department of Neurobiology , Care Sciences and Society (NVS), Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet , Huddinge , Sweden
| | - Lorena Galán-Acosta
- a Department of Neurobiology , Care Sciences and Society (NVS), Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet , Huddinge , Sweden
| | - Axel Leppert
- a Department of Neurobiology , Care Sciences and Society (NVS), Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet , Huddinge , Sweden
| | - Jenny Presto
- a Department of Neurobiology , Care Sciences and Society (NVS), Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet , Huddinge , Sweden
| | - Jan Johansson
- a Department of Neurobiology , Care Sciences and Society (NVS), Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet , Huddinge , Sweden
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8
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Ankarcrona M, Winblad B, Monteiro C, Fearns C, Powers ET, Johansson J, Westermark GT, Presto J, Ericzon BG, Kelly JW. Current and future treatment of amyloid diseases. J Intern Med 2016; 280:177-202. [PMID: 27165517 PMCID: PMC4956553 DOI: 10.1111/joim.12506] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
There are more than 30 human proteins whose aggregation appears to cause degenerative maladies referred to as amyloid diseases or amyloidoses. These disorders are named after the characteristic cross-β-sheet amyloid fibrils that accumulate systemically or are localized to specific organs. In most cases, current treatment is limited to symptomatic approaches and thus disease-modifying therapies are needed. Alzheimer's disease is a neurodegenerative disorder with extracellular amyloid β-peptide (Aβ) fibrils and intracellular tau neurofibrillary tangles as pathological hallmarks. Numerous clinical trials have been conducted with passive and active immunotherapy, and small molecules to inhibit Aβ formation and aggregation or to enhance Aβ clearance; so far such clinical trials have been unsuccessful. Novel strategies are therefore required and here we will discuss the possibility of utilizing the chaperone BRICHOS to prevent Aβ aggregation and toxicity. Type 2 diabetes mellitus is symptomatically treated with insulin. However, the underlying pathology is linked to the aggregation and progressive accumulation of islet amyloid polypeptide as fibrils and oligomers, which are cytotoxic. Several compounds have been shown to inhibit islet amyloid aggregation and cytotoxicity in vitro. Future animal studies and clinical trials have to be conducted to determine their efficacy in vivo. The transthyretin (TTR) amyloidoses are a group of systemic degenerative diseases compromising multiple organ systems, caused by TTR aggregation. Liver transplantation decreases the generation of misfolded TTR and improves the quality of life for a subgroup of this patient population. Compounds that stabilize the natively folded, nonamyloidogenic, tetrameric conformation of TTR have been developed and the drug tafamidis is available as a promising treatment.
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Affiliation(s)
- M Ankarcrona
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - B Winblad
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - C Monteiro
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - C Fearns
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - E T Powers
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA
| | - J Johansson
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - G T Westermark
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - J Presto
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - B-G Ericzon
- Division of Transplantation Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - J W Kelly
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
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9
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Abstract
Many proteins can form amyloid-like fibrils in vitro, but only about 30 amyloids are linked to disease, whereas some proteins form physiological amyloid-like assemblies. This raises questions of how the formation of toxic protein species during amyloidogenesis is prevented or contained in vivo. Intrinsic chaperoning or regulatory factors can control the aggregation in different protein systems, thereby preventing unwanted aggregation and enabling the biological use of amyloidogenic proteins. The molecular actions of these chaperones and regulators provide clues to the prevention of amyloid disease, as well as to the harnessing of amyloidogenic proteins in medicine and biotechnology.
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Affiliation(s)
- Michael Landreh
- From the Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 5QY, United Kingdom
| | - Anna Rising
- the Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Karolinska Institutet - Novum, 141 57 Huddinge, Sweden, the Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, Box 575, 751 23 Uppsala, Sweden
| | - Jenny Presto
- the Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Karolinska Institutet - Novum, 141 57 Huddinge, Sweden
| | - Hans Jörnvall
- the Department of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, SE-171 77 Stockholm, Sweden, and
| | - Jan Johansson
- the Department of Neurobiology, Care Sciences and Society (NVS), Center for Alzheimer Research, Karolinska Institutet - Novum, 141 57 Huddinge, Sweden, the Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, Box 575, 751 23 Uppsala, Sweden, the Institute of Mathematics and Natural Sciences, Tallinn University, Narva mnt 25, 101 20 Tallinn, Estonia
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10
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Sáenz A, Presto J, Lara P, Akinyi-Oloo L, García-Fojeda B, Nilsson I, Johansson J, Casals C. Folding and Intramembraneous BRICHOS Binding of the Prosurfactant Protein C Transmembrane Segment. J Biol Chem 2015; 290:17628-41. [PMID: 26041777 DOI: 10.1074/jbc.m114.630343] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 12/06/2014] [Indexed: 12/19/2022] Open
Abstract
Surfactant protein C (SP-C) is a novel amyloid protein found in the lung tissue of patients suffering from interstitial lung disease (ILD) due to mutations in the gene of the precursor protein pro-SP-C. SP-C is a small α-helical hydrophobic protein with an unusually high content of valine residues. SP-C is prone to convert into β-sheet aggregates, forming amyloid fibrils. Nature's way of solving this folding problem is to include a BRICHOS domain in pro-SP-C, which functions as a chaperone for SP-C during biosynthesis. Mutations in the pro-SP-C BRICHOS domain or linker region lead to amyloid formation of the SP-C protein and ILD. In this study, we used an in vitro transcription/translation system to study translocon-mediated folding of the WT pro-SP-C poly-Val and a designed poly-Leu transmembrane (TM) segment in the endoplasmic reticulum (ER) membrane. Furthermore, to understand how the pro-SP-C BRICHOS domain present in the ER lumen can interact with the TM segment of pro-SP-C, we studied the membrane insertion properties of the recombinant form of the pro-SP-C BRICHOS domain and two ILD-associated mutants. The results show that the co-translational folding of the WT pro-SP-C TM segment is inefficient, that the BRICHOS domain inserts into superficial parts of fluid membranes, and that BRICHOS membrane insertion is promoted by poly-Val peptides present in the membrane. In contrast, one BRICHOS and one non-BRICHOS ILD-associated mutant could not insert into membranes. These findings support a chaperone function of the BRICHOS domain, possibly together with the linker region, during pro-SP-C biosynthesis in the ER.
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Affiliation(s)
- Alejandra Sáenz
- From the Department of Biochemistry and Molecular Biology I, Complutense University of Madrid, 28040 Madrid, Spain, the Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jenny Presto
- the Center for Alzheimer Research, NVS (Neurobiology, Care Sciences, and Society) Department, Karolinska Institutet, S-141 57 Huddinge, Sweden, and
| | - Patricia Lara
- the Department of Biochemistry and Biophysics, Center for Biomembrane Research, Stockholm University, S-10691 Stockholm, Sweden
| | - Laura Akinyi-Oloo
- the Department of Biochemistry and Biophysics, Center for Biomembrane Research, Stockholm University, S-10691 Stockholm, Sweden
| | - Belén García-Fojeda
- the Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - IngMarie Nilsson
- the Department of Biochemistry and Biophysics, Center for Biomembrane Research, Stockholm University, S-10691 Stockholm, Sweden
| | - Jan Johansson
- the Center for Alzheimer Research, NVS (Neurobiology, Care Sciences, and Society) Department, Karolinska Institutet, S-141 57 Huddinge, Sweden, and
| | - Cristina Casals
- From the Department of Biochemistry and Molecular Biology I, Complutense University of Madrid, 28040 Madrid, Spain, the Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain,
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11
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Biverstål H, Dolfe L, Hermansson E, Leppert A, Reifenrath M, Winblad B, Presto J, Johansson J. Dissociation of a BRICHOS trimer into monomers leads to increased inhibitory effect on Aβ42 fibril formation. Biochim Biophys Acta 2015; 1854:835-43. [PMID: 25891900 DOI: 10.1016/j.bbapap.2015.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 12/18/2014] [Revised: 03/17/2015] [Accepted: 04/09/2015] [Indexed: 11/18/2022]
Abstract
The BRICHOS domain is associated with human amyloid disease, and it efficiently prevents amyloid fibril formation of the amyloid β-peptide (Aβ) in vitro and in vivo. Recombinant human prosurfactant protein C (proSP-C) BRICHOS domain forms a homotrimer as observed by x-ray crystallography, analytical ultracentrifugation, native polyacrylamide gel electrophoresis, analytical size exclusion chromatography and electrospray mass spectrometry. It was hypothesized that the trimer is an inactive storage form, as a putative substrate-binding site identified in the monomer, is buried in the subunit interface of the trimer. We show here increased dissociation of the BRICHOS trimer into monomers, by addition of detergents or of bis-ANS, known to bind to the putative substrate-binding site, or by introducing a Ser to Arg mutation expected to interfere with trimer formation. This leads to increased capacity to delay Aβ(42) fibril formation. Cross-linking of the BRICHOS trimer with glutaraldehyde, in contrast, renders it unable to affect Aβ(42) fibril formation. Moreover, proSP-C BRICHOS expressed in HEK293 cells is mainly monomeric, as detected by proximity ligation assay. Finally, proteolytic cleavage of BRICHOS in a loop region that is cleaved during proSP-C biosynthesis results in increased capacity to delay Aβ(42) fibril formation. These results indicate that modulation of the accessibility of the substrate-binding site is a means to regulate BRICHOS activity.
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Affiliation(s)
- Henrik Biverstål
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden.
| | - Lisa Dolfe
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Erik Hermansson
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Axel Leppert
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Mara Reifenrath
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Bengt Winblad
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Jenny Presto
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden
| | - Jan Johansson
- Karolinska Institutet, Department of NVS, Center for Alzheimer Research, Division of Neurogeriatrics, 141 57 Huddinge, Sweden; Department of Anatomy, Physiology and Biochemistry, The Biomedical Centre, Swedish University of Agricultural Sciences, Box 575, 751 23 Uppsala, Sweden; Institute of Mathematics and Natural Sciences, Tallinn University, Narva mnt 25, Tallinn 101 20, Estonia
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12
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Cohen SIA, Arosio P, Presto J, Kurudenkandy FR, Biverstal H, Dolfe L, Dunning C, Yang X, Frohm B, Vendruscolo M, Johansson J, Dobson CM, Fisahn A, Knowles TPJ, Linse S. A molecular chaperone breaks the catalytic cycle that generates toxic Aβ oligomers. Nat Struct Mol Biol 2015; 22:207-213. [PMID: 25686087 PMCID: PMC4595974 DOI: 10.1038/nsmb.2971] [Citation(s) in RCA: 292] [Impact Index Per Article: 32.4] [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: 08/17/2014] [Accepted: 01/08/2015] [Indexed: 12/23/2022]
Abstract
Alzheimer’s disease is an increasingly prevalent neurodegenerative disorder whose pathogenesis has been associated with aggregation of the amyloid-β peptide (Aβ42). Recent studies have revealed that once Aβ42 fibrils are generated, their surfaces strongly catalyse the formation of neurotoxic oligomers. Here we show that a molecular chaperone, a Brichos domain, can specifically inhibit this catalytic cycle and limit Aβ42 toxicity. We demonstrate in vitro that Brichos achieves this inhibition by binding to the surfaces of fibrils, thereby redirecting the aggregation reaction to a pathway that involves minimal formation of toxic oligomeric intermediates. We verify that this mechanism occurs in living brain tissue by means of cytotoxicity and electrophysiology experiments. These results reveal that molecular chaperones can help maintain protein homeostasis by selectively suppressing critical microscopic steps within the complex reaction pathways responsible for the toxic effects of protein misfolding and aggregation.
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Affiliation(s)
- Samuel I A Cohen
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Paolo Arosio
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Jenny Presto
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden
| | - Firoz Roshan Kurudenkandy
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden
| | - Henrik Biverstal
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden
| | - Lisa Dolfe
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden
| | - Christopher Dunning
- Department of Biochemistry and Structural Biology, Lund University, Box 124, SE221 00 Lund, Sweden
| | - Xiaoting Yang
- Department of Biochemistry and Structural Biology, Lund University, Box 124, SE221 00 Lund, Sweden
| | - Birgitta Frohm
- Department of Biochemistry and Structural Biology, Lund University, Box 124, SE221 00 Lund, Sweden
| | - Michele Vendruscolo
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Jan Johansson
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden.,Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, Box 575, SE751 23 Uppsala, Sweden.,Institute of Mathematics and Natural Sciences, Tallinn University, Narva mnt 25, 101 20 Tallinn, Estonia P. O. Box 124, SE221 00 Lund, Sweden
| | - Christopher M Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - André Fisahn
- Karolinska Institutet, Dept NVS, Center for Alzheimer Research, Division for Neurogeriatrics, 141 86 Stockholm, Sweden
| | - Tuomas P J Knowles
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Lund University, Box 124, SE221 00 Lund, Sweden
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13
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Del Campo M, Oliveira CR, Scheper W, Zwart R, Korth C, Müller-Schiffmann A, Kostallas G, Biverstal H, Presto J, Johansson J, Hoozemans JJ, Pereira CF, Teunissen CE. BRI2 ectodomain affects Aβ42 fibrillation and tau truncation in human neuroblastoma cells. Cell Mol Life Sci 2014; 72:1599-611. [PMID: 25336154 DOI: 10.1007/s00018-014-1769-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 11/29/2022]
Abstract
Alzheimer's disease (AD) is pathologically characterized by the presence of misfolded proteins such as amyloid beta (Aβ) in senile plaques, and hyperphosphorylated tau and truncated tau in neurofibrillary tangles (NFT). The BRI2 protein inhibits Aβ aggregation via its BRICHOS domain and regulates critical proteins involved in initiating the amyloid cascade, which has been hypothesized to be central in AD pathogenesis. We recently detected the deposition of BRI2 ectodomain associated with Aβ plaques and concomitant changes in its processing enzymes in early stages of AD. Here, we aimed to investigate the effects of recombinant BRI2 ectodomain (rBRI276-266) on Aβ aggregation and on important molecular pathways involved in early stages of AD, including the unfolded protein response (UPR), phosphorylation and truncation of tau, as well as apoptosis. We found that rBRI276-266 delays Aβ fibril formation, although less efficiently than the BRI2 BRICHOS domain (BRI2 residues 113-231). In human neuroblastoma SH-SY5Y cells, rBRI276-266 slightly decreased cell viability and increased up to two-fold the Bax/Bcl-2 ratio and the subsequent activity of caspases 3 and 9, indicating activation of apoptosis. rBRI276-266 upregulated the chaperone BiP but did not modify the mRNA expression of other UPR markers (CHOP and Xbp-1). Strikingly, rBRI276-266 induced the activation of GSK3β but not the phosphorylation of tau. However, exposure to rBRI276-266 significantly induced the truncation of tau, indicating that BRI2 ectodomain can contribute to NFT formation. Since BRI2 can also regulate the metabolism of Aβ, the current data suggests that BRI2 ectodomain is a potential nexus between Aβ, tau pathology and neurodegeneration.
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Affiliation(s)
- M Del Campo
- Neurochemistry Laboratory, Department of Clinical Chemistry, VU University Medical Center (VUmc), Room PK1 Br016, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands,
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14
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Lee H, Lara P, Ostuni A, Presto J, Johansson J, Nilsson I, Kim H. Live-cell topology assessment of URG7, MRP6₁₀₂ and SP-C using glycosylatable green fluorescent protein in mammalian cells. Biochem Biophys Res Commun 2014; 450:1587-92. [PMID: 25034329 DOI: 10.1016/j.bbrc.2014.07.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 07/01/2014] [Accepted: 07/08/2014] [Indexed: 10/25/2022]
Abstract
Experimental tools to determine membrane topology of a protein are rather limited in higher eukaryotic organisms. Here, we report the use of glycosylatable GFP (gGFP) as a sensitive and versatile membrane topology reporter in mammalian cells. gGFP selectively loses its fluorescence upon N-linked glycosylation in the ER lumen. Thus, positive fluorescence signal assigns location of gGFP to the cytosol whereas no fluorescence signal and a glycosylated status of gGFP map the location of gGFP to the ER lumen. By using mammalian gGFP, the membrane topology of disease-associated membrane proteins, URG7, MRP6102, SP-C(Val) and SP-C(Leu) was confirmed. URG7 is partially targeted to the ER, and inserted in Cin form. MRP6102 and SP-C(Leu/Val) are inserted into the membrane in Cout form. A minor population of untargeted SP-C is removed by proteasome dependent quality control system.
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Affiliation(s)
- Hunsang Lee
- School of Biological Sciences, Seoul National University, Seoul 151-747, South Korea
| | - Patricia Lara
- Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Angela Ostuni
- Department of Sciences, University of Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Jenny Presto
- Karolinska Institutet, Dept of Neurobiology, Care Sciences and Society, Novum 5th Floor, 141 86 Stockholm, Sweden
| | - Janne Johansson
- Karolinska Institutet, Dept of Neurobiology, Care Sciences and Society, Novum 5th Floor, 141 86 Stockholm, Sweden; Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, 751 23 Uppsala, Sweden; Institute of Mathematics and Natural Sciences, Tallinn University, Narva mnt 25, 101 20 Tallinn, Estonia
| | - IngMarie Nilsson
- Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Hyun Kim
- School of Biological Sciences, Seoul National University, Seoul 151-747, South Korea.
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15
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Hermansson E, Schultz S, Crowther D, Linse S, Winblad B, Westermark G, Johansson J, Presto J. The chaperone domain BRICHOS prevents CNS toxicity of amyloid-β peptide in Drosophila melanogaster. Dis Model Mech 2014; 7:659-65. [PMID: 24682783 PMCID: PMC4036473 DOI: 10.1242/dmm.014787] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [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] [Indexed: 11/20/2022] Open
Abstract
Aggregation of the amyloid-β peptide (Aβ) into toxic oligomers and amyloid fibrils is linked to the development of Alzheimer’s disease (AD). Mutations of the BRICHOS chaperone domain are associated with amyloid disease and recent in vitro data show that BRICHOS efficiently delays Aβ42 oligomerization and fibril formation. We have generated transgenic Drosophila melanogaster flies that express the Aβ42 peptide and the BRICHOS domain in the central nervous system (CNS). Co-expression of Aβ42 and BRICHOS resulted in delayed Aβ42 aggregation and dramatic improvements of both lifespan and locomotor function compared with flies expressing Aβ42 alone. Moreover, BRICHOS increased the ratio of soluble:insoluble Aβ42 and bound to deposits of Aβ42 in the fly brain. Our results show that the BRICHOS domain efficiently reduces the neurotoxic effects of Aβ42, although significant Aβ42 aggregation is taking place. We propose that BRICHOS-based approaches should be explored with an aim towards the future prevention and treatment of AD.
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Affiliation(s)
- Erik Hermansson
- KI Alzheimer Disease Research Centre, NVS Department, Karolinska Institutet, Novum, 5th Floor, 141 86 Stockholm, Sweden
| | - Sebastian Schultz
- Department of Biochemistry, Institute for Cancer Research, Oslo University Hospital - The Norwegian Radium Hospital, 0379 Oslo, Norway
| | - Damian Crowther
- Department of Genetics, University of Cambridge, Downing Street, Cambridge, CB2 3EH, UK
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Lund University, PO Box 124, 221 00 Lund, Sweden
| | - Bengt Winblad
- KI Alzheimer Disease Research Centre, NVS Department, Karolinska Institutet, Novum, 5th Floor, 141 86 Stockholm, Sweden
| | - Gunilla Westermark
- Department of Medical Cell Biology, Uppsala University, 751 23 Uppsala, Sweden
| | - Jan Johansson
- KI Alzheimer Disease Research Centre, NVS Department, Karolinska Institutet, Novum, 5th Floor, 141 86 Stockholm, Sweden. Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, 751 23 Uppsala, Sweden. Institute of Mathematics and Natural Sciences, Tallinn University, Narva mnt 25, 101 20 Tallinn, Estonia.
| | - Jenny Presto
- KI Alzheimer Disease Research Centre, NVS Department, Karolinska Institutet, Novum, 5th Floor, 141 86 Stockholm, Sweden.
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16
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Affiliation(s)
- Stefan D. Knight
- Department
of Cell and Molecular Biology, Uppsala University, 751 05 Uppsala, Sweden
| | - Jenny Presto
- KI-Alzheimer’s Disease Research
Center, NVS Department, Karolinska Institutet, S-141 86 Stockholm, Sweden
| | - Sara Linse
- Department
of Biochemistry and Structural Biology, Lund University, Chemical Centre, P.O.
Box 124, SE221 00 Lund, Sweden
| | - Jan Johansson
- KI-Alzheimer’s Disease Research
Center, NVS Department, Karolinska Institutet, S-141 86 Stockholm, Sweden
- Department
of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, 751 23 Uppsala, Sweden
- Institute
of Mathematics and Natural Sciences, Tallinn University, Narva mnt
25, 101 20 Tallinn, Estonia
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17
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Hermansson E, Loganathan K, Crowther D, Westermark G, Winblad B, Johansson J, Presto J. O1–01–01: BRICHOS efficiently inhibits beta‐amyloid 42 aggregation and toxicity in
Drosophila melanogaster. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.04.049] [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: 11/15/2022]
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18
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Willander H, Presto J, Askarieh G, Biverstål H, Frohm B, Knight SD, Johansson J, Linse S. BRICHOS domains efficiently delay fibrillation of amyloid β-peptide. J Biol Chem 2012; 287:31608-17. [PMID: 22801430 DOI: 10.1074/jbc.m112.393157] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Amyloid diseases such as Alzheimer, Parkinson, and prion diseases are associated with a specific form of protein misfolding and aggregation into oligomers and fibrils rich in β-sheet structure. The BRICHOS domain consisting of ∼100 residues is found in membrane proteins associated with degenerative and proliferative disease, including lung fibrosis (surfactant protein C precursor; pro-SP-C) and familial dementia (Bri2). We find that recombinant BRICHOS domains from Bri2 and pro-SP-C prevent fibril formation of amyloid β-peptides (Aβ(40) and Aβ(42)) far below the stoichiometric ratio. Kinetic experiments show that a main effect of BRICHOS is to prolong the lag time in a concentration-dependent, quantitative, and reproducible manner. An ongoing aggregation process is retarded if BRICHOS is added at any time during the lag phase, but it is too late to interfere at the end of the process. Results from circular dichroism and NMR spectroscopy, as well as analytical size exclusion chromatography, imply that Aβ is maintained as an unstructured monomer during the extended lag phase in the presence of BRICHOS. Electron microscopy shows that although the process is delayed, typical amyloid fibrils are eventually formed also when BRICHOS is present. Structural BRICHOS models display a conserved array of tyrosine rings on a five-stranded β-sheet, with inter-hydroxyl distances suited for hydrogen-bonding peptides in an extended β-conformation. Our data imply that the inhibitory mechanism is reliant on BRICHOS interfering with molecular events during the lag phase.
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Affiliation(s)
- Hanna Willander
- Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, 751 23 Uppsala, Sweden
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19
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Presto J, Willander H, Askarieh G, Hermansson E, Knight S, Linse S, Johansson J. P3‐314: Prevention of amyloid β‐peptide fibrillation by the BRICHOS domain. Alzheimers Dement 2011. [DOI: 10.1016/j.jalz.2011.05.1756] [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: 11/15/2022]
Affiliation(s)
| | | | | | | | - Stefan Knight
- Swedish University of Agricultural SciencesUppsalaSweden
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20
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Johansson J, Nerelius C, Willander H, Presto J. Conformational preferences of non-polar amino acid residues: an additional factor in amyloid formation. Biochem Biophys Res Commun 2010; 402:515-8. [PMID: 20971069 DOI: 10.1016/j.bbrc.2010.10.062] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 10/18/2010] [Indexed: 11/18/2022]
Abstract
Amyloid consists of β-sheet polymers and is associated with disease and with functional assemblies. Amyloid-forming proteins differ widely in native structures and sequences. We describe here how conformational preferences of non-polar amino acid residues can affect amyloid formation. The most non-polar residues promote either β-strands (Val, Ile, Phe, and Cys, VIFC) or α-helices (Leu, Ala, and Met, LAM), while the most polar residues promote only α-helices. For 12 proteins associated with disease, the localizations of the amyloid core regions are known. Eleven of these contain segments that are biased for VIFC, but essentially lack segments that are biased for LAM. For the amyloid β-peptide associated with Alzheimer's disease and an amyloidogenic fragment of the prion protein, observed effects of mutations support that VIFC bias favors formation of β-sheet aggregates and amyloid, while LAM bias prevents it. VIFC and LAM profiles combine information on secondary structure propensities and polarity, and add a simple criterion to the prediction of amyloidogenic regions.
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Affiliation(s)
- Jan Johansson
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, The Biomedical Centre, 751 23 Uppsala, Sweden.
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21
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Johansson H, Eriksson M, Nordling K, Presto J, Johansson J. The Brichos domain of prosurfactant protein C can hold and fold a transmembrane segment. Protein Sci 2009; 18:1175-82. [PMID: 19472327 DOI: 10.1002/pro.123] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Prosurfactant protein C (proSP-C) is a 197-residue integral membrane protein, in which the C-terminal domain (CTC, positions 59-197) is localized in the endoplasmic reticulum (ER) lumen and contains a Brichos domain (positions 94-197). Mature SP-C corresponds largely to the transmembrane (TM) region of proSP-C. CTC binds to SP-C, provided that it is in nonhelical conformation, and can prevent formation of intracellular amyloid-like inclusions of proSP-C that harbor mutations linked to interstitial lung disease (ILD). Herein it is shown that expression of proSP-C (1-58), that is, the N-terminal propeptide and the TM region, in HEK293 cells results in virtually no detectable protein, while coexpression of CTC in trans yields SDS-soluble monomeric proSP-C (1-58). Recombinant human (rh) CTC binds to cellulose-bound peptides derived from the nonpolar TM region, but not the polar cytosolic part, of proSP-C, and requires >/=5-residues for maximal binding. Binding of rhCTC to a nonhelical peptide derived from SP-C results in alpha-helix formation provided that it contains a long TM segment. Finally, rhCTC and rhCTC Brichos domain shows very similar substrate specificities, but rhCTC(L188Q), a mutation linked to ILD is unable to bind all peptides analyzed. These data indicate that the Brichos domain of proSP-C is a chaperone that induces alpha-helix formation of an aggregation-prone TM region.
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Affiliation(s)
- Hanna Johansson
- Department of Anatomy, Physiology and Biochemistry, SLU, The Biomedical Centre, Uppsala, Sweden
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22
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Carlsson P, Presto J, Spillmann D, Lindahl U, Kjellén L. Heparin/heparan sulfate biosynthesis: processive formation of N-sulfated domains. J Biol Chem 2008; 283:20008-14. [PMID: 18487608 DOI: 10.1074/jbc.m801652200] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heparan sulfate (HS) proteoglycans influence embryonic development as well as adult physiology through interactions with various proteins, including growth factors/morphogens and their receptors. The interactions depend on HS structure, which is largely determined during biosynthesis by Golgi enzymes. A key step is the initial generation of N-sulfated domains, primary sites for further polymer modification and ultimately for functional interactions with protein ligands. Such domains, generated through action of a bifunctional GlcNAc N-deacetylase/N-sulfotransferase (NDST) on a [GlcUA-GlcNAc](n) substrate, are of variable size due to regulatory mechanisms that remain poorly understood. We have studied the action of recombinant NDSTs on the [GlcUA-GlcNAc](n) precursor in the presence and absence of the sulfate donor, 3'-phosphoadenosine 5'-phosphosulfate (PAPS). In the absence of PAPS, NDST catalyzes limited and seemingly random N-deacetylation of GlcNAc residues. By contrast, access to PAPS shifts the NDST toward generation of extended N-sulfated domains that are formed through coupled N-deacetylation/N-sulfation in an apparent processive mode. Variations in N-substitution pattern could be obtained by varying PAPS concentration or by experimentally segregating the N-deacetylation and N-sulfation steps. We speculate that similar mechanisms may apply also to the regulation of HS biosynthesis in the living cell.
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Affiliation(s)
- Pernilla Carlsson
- Department of Medical Biochemistry and Microbiology at Uppsala University, Uppsala, Sweden
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23
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Busse M, Feta A, Presto J, Wilén M, Grønning M, Kjellén L, Kusche-Gullberg M. Contribution of EXT1, EXT2, and EXTL3 to heparan sulfate chain elongation. J Biol Chem 2007; 282:32802-10. [PMID: 17761672 DOI: 10.1074/jbc.m703560200] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The exostosin (EXT) family of genes encodes glycosyltransferases involved in heparan sulfate biosynthesis. Five human members of this family have been cloned to date: EXT1, EXT2, EXTL1, EXTL2, and EXTL3. EXT1 and EXT2 are believed to form a Golgi-located hetero-oligomeric complex that catalyzes the chain elongation step in heparan sulfate biosynthesis, whereas the EXTL proteins exhibit overlapping glycosyl-transferase activities in vitro, so that it is not apparent what reactions they catalyze in vivo. We used gene-silencing strategies to investigate the roles of EXT1, EXT2, and EXTL3 in heparan sulfate chain elongation. Small interfering RNAs (siRNAs) directed against the human EXT1, EXT2, or EXTL3 mRNAs were introduced into human embryonic kidney 293 cells. Compared with cells transfected with control siRNA, those transfected with EXT1 or EXT2 siRNA synthesized shorter heparan sulfate chains, and those transfected with EXTL3 siRNA synthesized longer chains. We also generated human cell lines overexpressing the EXT proteins. Overexpression of EXT1 resulted in increased HS chain length, which was even more pronounced in cells coexpressing EXT2, whereas overexpression of EXT2 alone had no detectable effect on heparan sulfate chain elongation. Mutations in either EXT1 or EXT2 are associated with hereditary multiple exostoses, a human disorder characterized by the formation of cartilage-capped bony outgrowths at the epiphyseal growth plates. To further investigate the role of EXT2, we generated human cell lines overexpressing mutant EXT2. One of the mutations, EXT2-Y419X, resulted in a truncated protein. Interestingly, the capacity of wild type EXT2 to enhance HS chain length together with EXT1 was not shared by the EXT2-Y419X mutant.
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Affiliation(s)
- Marta Busse
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, Bergen, Norway
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