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Chibh S, Singh A, Finkelstein-Zuta G, Koren G, Sorkin R, Beck R, Rencus-Lazar S, Gazit E. Amylum forms typical self-assembled amyloid fibrils. SCIENCE ADVANCES 2024; 10:eadp6471. [PMID: 39213351 PMCID: PMC11364109 DOI: 10.1126/sciadv.adp6471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 07/25/2024] [Indexed: 09/04/2024]
Abstract
Amyloid fibril formation is a central biochemical process in pathology and physiology. Over decades, substantial advances were made in elucidating the mechanisms of amyloidogenesis, its links to disease, and the production of functional supramolecular structures. While the term "amyloid" denotes starch-like features of these assemblies, no evidence of amyloidogenic behavior of polysaccharides has been so far reported. Here, we investigate the potential of amylum (starch) not only to self-assemble into hierarchical fibrillar structures but also to exhibit canonical amyloidogenic properties. Ordered amylum structures were formed through a sigmoidal growth process with characteristic amyloid features including typical nanofibril morphology, binding to indicative dyes, inherent luminescence, apple-green birefringence upon Congo red staining, and notable mechanical rigidity. These findings shed light on polysaccharide self-assembly and expand the generic amyloid phenomenon.
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Affiliation(s)
- Sonika Chibh
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ashmeet Singh
- Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Gal Finkelstein-Zuta
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Gil Koren
- The Raymond & Beverly Sackler School of Physics and Astronomy, The Center for Nanoscience and Nanotechnology, and the Center for Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv 69978, Israel
| | - Raya Sorkin
- School of Chemistry, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel Aviv University; Tel Aviv, 6997801, Israel
- Center of Physics and Chemistry of Living Systems, Tel Aviv University; Tel Aviv, 6997801, Israel
| | - Roy Beck
- The Raymond & Beverly Sackler School of Physics and Astronomy, The Center for Nanoscience and Nanotechnology, and the Center for Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv 69978, Israel
| | - Sigal Rencus-Lazar
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ehud Gazit
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
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Myers C, Atkins GR, Villarreal J, Sutton RB, Cornwall GA. The mouse epididymal amyloid matrix is a mammalian counterpart of a bacterial biofilm. iScience 2024; 27:110152. [PMID: 38974467 PMCID: PMC11225826 DOI: 10.1016/j.isci.2024.110152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 04/14/2024] [Accepted: 05/28/2024] [Indexed: 07/09/2024] Open
Abstract
The mouse epididymis is a long tubule connecting the testis to the vas deferens. Its primary functions are to mature spermatozoa into motile and fertile cells and to protect them from pathogens that ascend the male tract. We previously demonstrated that a functional extracellular amyloid matrix surrounds spermatozoa in the epididymal lumen and has host defense functions, properties not unlike that of an extracellular biofilm that encloses and protects a bacterial community. Here we show the epididymal amyloid matrix also structurally resembles a biofilm by containing eDNA, eRNA, and mucin-like polysaccharides. Further these structural components exhibit comparable behaviors and perform functions such as their counterparts in bacterial biofilms. Our studies suggest that nature has used the ancient building blocks of bacterial biofilms to form an analogous structure that nurtures and protects the mammalian male germline.
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Affiliation(s)
- Caitlyn Myers
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Georgia Rae Atkins
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Johanna Villarreal
- Department of Cell Physiology and Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - R. Bryan Sutton
- Department of Cell Physiology and Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Gail A. Cornwall
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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3
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Makshakova ON, Bogdanova LR, Faizullin DA, Ermakova EA, Zuev YF. Sulfated Polysaccharides as a Fighter with Protein Non-Physiological Aggregation: The Role of Polysaccharide Flexibility and Charge Density. Int J Mol Sci 2023; 24:16223. [PMID: 38003413 PMCID: PMC10671430 DOI: 10.3390/ijms242216223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/09/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Proteins can lose native functionality due to non-physiological aggregation. In this work, we have shown the power of sulfated polysaccharides as a natural assistant to restore damaged protein structures. Protein aggregates enriched by cross-β structures are a characteristic of amyloid fibrils related to different health disorders. Our recent studies demonstrated that model fibrils of hen egg white lysozyme (HEWL) can be disaggregated and renatured by some negatively charged polysaccharides. In the current work, using the same model protein system and FTIR spectroscopy, we studied the role of conformation and charge distribution along the polysaccharide chain in the protein secondary structure conversion. The effects of three carrageenans (κ, ι, and λ) possessing from one to three sulfate groups per disaccharide unit were shown to be different. κ-Carrageenan was able to fully eliminate cross-β structures and complete the renaturation process. ι-Carrageenan only initiated the formation of native-like β-structures in HEWL, retaining most of the cross-β structures. In contrast, λ-carrageenan even increased the content of amyloid cross-β structures. Furthermore, κ-carrageenan in rigid helical conformation loses its capability to restore protein native structures, largely increasing the amount of amyloid cross-β structures. Our findings create a platform for the design of novel natural chaperons to counteract protein unfolding.
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Affiliation(s)
- Olga N. Makshakova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Street, 420111 Kazan, Russia
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4
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Indig RY, Landau M. Designed inhibitors to reduce amyloid virulence and cytotoxicity and combat neurodegenerative and infectious diseases. Curr Opin Chem Biol 2023; 75:102318. [PMID: 37196450 DOI: 10.1016/j.cbpa.2023.102318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/10/2023] [Accepted: 04/14/2023] [Indexed: 05/19/2023]
Abstract
The review highlights the role of amyloids in various diseases and the challenges associated with targeting human amyloids in therapeutic development. However, due to the better understanding of microbial amyloids' role as virulence factors, there is a growing interest in repurposing and designing anti-amyloid compounds for antivirulence therapy. The identification of amyloid inhibitors has not only significant clinical implications but also provides valuable insights into the structure and function of amyloids. The review showcases small molecules and peptides that specifically target amyloids in both humans and microbes, reducing cytotoxicity and biofilm formation, respectively. The review emphasizes the importance of further research on amyloid structures, mechanisms, and interactions across all life forms to yield new drug targets and improve the design of selective treatments. Overall, the review highlights the potential for amyloid inhibitors in therapeutic development for both human diseases and microbial infections.
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Affiliation(s)
- Rinat Yona Indig
- Department of Biology, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Meytal Landau
- Department of Biology, Technion-Israel Institute of Technology, Haifa 3200003, Israel; Centre for Structural Systems Biology (CSSB) and Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany; Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany; European Molecular Biology Laboratory (EMBL), Hamburg, Germany.
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5
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The Ability of Some Polysaccharides to Disaggregate Lysozyme Amyloid Fibrils and Renature the Protein. Pharmaceutics 2023; 15:pharmaceutics15020624. [PMID: 36839946 PMCID: PMC9962556 DOI: 10.3390/pharmaceutics15020624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
The deposition of proteins in the form of insoluble amyloid fibril aggregates is linked to a range of diseases. The supramolecular architecture of such deposits is governed by the propagation of β-strands in the direction of protofilament growth. In the present study, we analyze the structural changes of hen egg-white lysozyme fibrils upon their interactions with a range of polysaccharides, using AFM and FTIR spectroscopy. Linear anionic polysaccharides, such as κ-carrageenan and sodium alginate, are shown to be capable to disaggregate protofilaments with eventual protein renaturation. The results help to understand the mechanism of amyloid disaggregation and create a platform for both the development of new therapeutic agents for amyloidose treatment, and the design of novel functional protein-polysaccharide complex-based nanomaterials.
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6
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Zaidi FK, Bhat R. Two polyphenols with diverse mechanisms towards amyloidosis: differential modulation of the fibrillation pathway of human lysozyme by curcumin and EGCG. J Biomol Struct Dyn 2022; 40:4593-4611. [DOI: 10.1080/07391102.2020.1860824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Fatima Kamal Zaidi
- Biophysical Chemistry Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Rajiv Bhat
- Biophysical Chemistry Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
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Microbiological-Chemical Sourced Chondroitin Sulfates Protect Neuroblastoma SH-SY5Y Cells against Oxidative Stress and Are Suitable for Hydrogel-Based Controlled Release. Antioxidants (Basel) 2021; 10:antiox10111816. [PMID: 34829687 PMCID: PMC8615127 DOI: 10.3390/antiox10111816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/08/2021] [Accepted: 11/11/2021] [Indexed: 12/05/2022] Open
Abstract
Chondroitin sulfates (CS) are a class of sulfated glycosaminoglycans involved in many biological processes. Several studies reported their protective effect against neurodegenerative conditions like Alzheimer’s disease. CS are commonly derived from animal sources, but ethical concerns, the risk of contamination with animal proteins, and the difficulty in controlling the sulfation pattern have prompted research towards non-animal sources. Here we exploited two microbiological-chemical sourced CS (i.e., CS-A,C and CS-A,C,K,L) and Carbopol 974P NF/agarose semi-interpenetrating polymer networks (i.e., P.NaOH.0 and P.Ethanol.0) to set up a release system, and tested the neuroprotective role of released CS against H2O2-induced oxidative stress. After assessing that our CS (1–100 µM) require a 3 h pre-treatment for neuroprotection with SH-SY5Y cells, we evaluated whether the autoclave type (i.e., N- or B-type) affects hydrogel viscoelastic properties. We selected B-type autoclaves and repeated the study after loading CS (1 or 0.1 mg CS/0.5 mL gel). After loading 1 mg CS/0.5 mL gel, we evaluated CS release up to 7 days by 1,9-dimethylmethylene blue (DMMB) assay and verified the neuroprotective role of CS-A,C (1 µM) in the supernatants. We observed that CS-A,C exhibits a broader neuroprotective effect than CS-A,C,K,L. Moreover, sulfation pattern affects not only neuroprotection, but also drug release.
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Makshakova ON, Bogdanova LR, Faizullin DA, Ermakova EA, Zuev YF, Sedov IA. Interaction-induced structural transformation of lysozyme and kappa-carrageenan in binary complexes. Carbohydr Polym 2021; 252:117181. [PMID: 33183628 DOI: 10.1016/j.carbpol.2020.117181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/16/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022]
Abstract
The interactions between κ-carrageenan and hen egg-white lysozyme have been studied. In dilute solutions, the insoluble complexes with constant κ-carrageenan/lysozyme ratio of 0.3, or 12 disaccharide units per mole of protein are formed. FTIR-spectroscopy revealed that κ-carrageenan retains its unordered conformation and induces the rise of β-structure in lysozyme. In the complexes formed in concentrated mixtures, κ-carrageenan adopts helical conformation and lysozyme retains its native-like structure. These complexes contain 21 disaccharide units per mole of protein. Molecular modeling showed that flexible coil and rigid double helix of κ-carrageenan have different binding patterns to lysozyme surface. The latter has a strong preference to positively charged spots in lysozyme α-domain while the former also interacts to protein β-domain and stabilizes short-living β-structures. The obtained results confirm the preference of unordered κ-carrageenan to β-structure rich protein regions, which can be further used in the development of carrageenan-based protection of amyloid-like aggregation of proteins.
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Affiliation(s)
- O N Makshakova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111, Kazan, Russia; Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russia.
| | - L R Bogdanova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111, Kazan, Russia; Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russia
| | - D A Faizullin
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111, Kazan, Russia
| | - E A Ermakova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111, Kazan, Russia; Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russia
| | - Yu F Zuev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111, Kazan, Russia
| | - I A Sedov
- Chemical Institute, Kazan Federal University, 18 Kremlevskaya Str., 420111, Kazan, Russia; Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russia
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9
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Zhao N, Meng J, Jiang W, Xu W, Liu C, Wang F. Study on the relationships between molecular weights of chondroitin sulfate oligosaccharides and Aβ-induced oxidative stress and the related mechanisms. Glycobiology 2020; 31:492-507. [PMID: 33043980 DOI: 10.1093/glycob/cwaa096] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 09/21/2020] [Accepted: 10/01/2020] [Indexed: 12/13/2022] Open
Abstract
In the present study, we studied anti-Alzheimer's disease (AD) activities of chondroitin sulfate (CS) oligosaccharides with different molecular weights. CS from shark cartilage was degraded by a recombinant CS endolyase, chondroitinase ABC I (CHSase ABC I), and CS disaccharide (DP2), tetrasaccharide (DP4), hexasaccharide (DP6), octasaccharide (DP8), decasaccharide (DP10) and dodecasaccharide (DP12) were obtained by separation with gel filtration. Anti-AD activities of CS oligosaccharides were assessed using Aβ-injured SH-SY5Y cells and BV2 cells. It was shown that CS oligosaccharides could block Aβ-induced oxidative stress, mitochondrial dysfunction and activation of intrinsic apoptotic pathway for SH-SY5Y cells. Furthermore, these activities increased with the increase of molecular weights. For Aβ-injured BV2 cells, CS oligosaccharides inhibited oxidative stress, the production of proinflammatory cytokines and the activation of toll-like receptor pathway, and CS DP2 had the best activity among them. In conclusion, CS oligosaccharides suppressed Aβ-induced oxidative stress and relevant injury in vitro, and these effects had different relationships with the molecular weights of CS oligosaccharides for different cell lines, which might be caused by different mechanisms.
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Affiliation(s)
- Na Zhao
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Jie Meng
- School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Wenjie Jiang
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Wenjia Xu
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Chunhui Liu
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Fengshan Wang
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China.,Laboratory of Carbohydrate Chemistry and Glycobiology, National Glycoengineering Research Center, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
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10
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Hyaluronan-carnosine conjugates inhibit Aβ aggregation and toxicity. Sci Rep 2020; 10:15998. [PMID: 32994475 PMCID: PMC7524733 DOI: 10.1038/s41598-020-72989-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 07/27/2020] [Indexed: 12/25/2022] Open
Abstract
Alzheimer’s disease is the most common neurodegenerative disorder. Finding a pharmacological approach that cures and/or prevents the onset of this devastating disease represents an important challenge for researchers. According to the amyloid cascade hypothesis, increases in extracellular amyloid-β (Aβ) levels give rise to different aggregated species, such as protofibrils, fibrils and oligomers, with oligomers being the more toxic species for cells. Many efforts have recently been focused on multi-target ligands to address the multiple events that occur concurrently with toxic aggregation at the onset of the disease. Moreover, investigating the effect of endogenous compounds or a combination thereof is a promising approach to prevent the side effects of entirely synthetic drugs. In this work, we report the synthesis, structural characterization and Aβ antiaggregant ability of new derivatives of hyaluronic acid (Hy, 200 and 700 kDa) functionalized with carnosine (Car), a multi-functional natural dipeptide. The bioactive substances (HyCar) inhibit the formation of amyloid-type aggregates of Aβ42 more than the parent compounds; this effect is proportional to Car loading. Furthermore, the HyCar derivatives are able to dissolve the amyloid fibrils and to reduce Aβ-induced toxicity in vitro. The enzymatic degradation of Aβ is also affected by the interaction with HyCar.
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Antonets KS, Belousov MV, Sulatskaya AI, Belousova ME, Kosolapova AO, Sulatsky MI, Andreeva EA, Zykin PA, Malovichko YV, Shtark OY, Lykholay AN, Volkov KV, Kuznetsova IM, Turoverov KK, Kochetkova EY, Bobylev AG, Usachev KS, Demidov ON, Tikhonovich IA, Nizhnikov AA. Accumulation of storage proteins in plant seeds is mediated by amyloid formation. PLoS Biol 2020; 18:e3000564. [PMID: 32701952 PMCID: PMC7377382 DOI: 10.1371/journal.pbio.3000564] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 06/19/2020] [Indexed: 02/04/2023] Open
Abstract
Amyloids are protein aggregates with a highly ordered spatial structure giving them unique physicochemical properties. Different amyloids not only participate in the development of numerous incurable diseases but control vital functions in archaea, bacteria and eukarya. Plants are a poorly studied systematic group in the field of amyloid biology. Amyloid properties have not yet been demonstrated for plant proteins under native conditions in vivo. Here we show that seeds of garden pea Pisum sativum L. contain amyloid-like aggregates of storage proteins, the most abundant one, 7S globulin Vicilin, forms bona fide amyloids in vivo and in vitro. Full-length Vicilin contains 2 evolutionary conserved β-barrel domains, Cupin-1.1 and Cupin-1.2, that self-assemble in vitro into amyloid fibrils with similar physicochemical properties. However, Cupin-1.2 fibrils unlike Cupin-1.1 can seed Vicilin fibrillation. In vivo, Vicilin forms amyloids in the cotyledon cells that bind amyloid-specific dyes and possess resistance to detergents and proteases. The Vicilin amyloid accumulation increases during seed maturation and wanes at germination. Amyloids of Vicilin resist digestion by gastrointestinal enzymes, persist in canned peas, and exhibit toxicity for yeast and mammalian cells. Our finding for the first time reveals involvement of amyloid formation in the accumulation of storage proteins in plant seeds.
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Affiliation(s)
- Kirill S. Antonets
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - Mikhail V. Belousov
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - Anna I. Sulatskaya
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Maria E. Belousova
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
| | - Anastasiia O. Kosolapova
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - Maksim I. Sulatsky
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | | | | | - Yury V. Malovichko
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - Oksana Y. Shtark
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
| | | | | | | | | | | | - Alexander G. Bobylev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Konstantin S. Usachev
- Laboratory of Structural Biology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Oleg. N. Demidov
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
- INSERM UMR1231, UBFC, Dijon, France
| | - Igor A. Tikhonovich
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - Anton A. Nizhnikov
- All-Russia Research Institute for Agricultural Microbiology (ARRIAM), St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
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12
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Iannuzzi C, Borriello M, D'Agostino A, Cimini D, Schiraldi C, Sirangelo I. Protective effect of extractive and biotechnological chondroitin in insulin amyloid and advanced glycation end product-induced toxicity. J Cell Physiol 2019; 234:3814-3828. [PMID: 30256388 DOI: 10.1002/jcp.27153] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/10/2018] [Indexed: 01/12/2023]
Abstract
Glycosaminoglycans are extracellular matrix components related to several biological functions and diseases. Chondroitin sulfate is a sulphated glycosaminoglycan synthesized as part of proteoglycan molecules. They are frequently associated with amyloid deposits and possess an active role in amyloid fibril formation. Recently, a neuroprotective effect of extracellular matrix components against amyloid toxicity and oxidative stress has been reported. Advanced glycation end products (AGEs), the end products of the glycation reaction, have been linked to amyloid-based neurodegenerative disease as associated with oxidative stress and inflammation. In this study we have analyzed the effect of chondroitin sulfate isolated from different species, in comparison with a new biotechnological unsulfated chondroitin, in the amyloid aggregation process of insulin, as well as the ability to prevent the formation of AGEs and related toxicity. The results have showed a determining role of chondroitin sulfate groups in modulating insulin amyloid aggregation. In addition, both sulfated and unsulfated chondroitins have shown protective properties against amyloid and AGEs-induced toxicity. These data are very relevant as a protective effect of these glycosaminoglycans in the AGE-induced toxicity was never observed before. Moreover, considering the issues related to the purity and safety of chondroitin from natural sources, this study suggests a new potential application for the biotechnological chondroitin.
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Affiliation(s)
- Clara Iannuzzi
- Department of Precision Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - Margherita Borriello
- Department of Precision Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - Antonella D'Agostino
- Department of Experimental Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - Donatella Cimini
- Department of Experimental Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - Chiara Schiraldi
- Department of Experimental Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - Ivana Sirangelo
- Department of Precision Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
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13
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Kameyama H, Uchimura K, Yamashita T, Kuwabara K, Mizuguchi M, Hung SC, Okuhira K, Masuda T, Kosugi T, Ohgita T, Saito H, Ando Y, Nishitsuji K. The Accumulation of Heparan Sulfate S-Domains in Kidney Transthyretin Deposits Accelerates Fibril Formation and Promotes Cytotoxicity. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 189:308-319. [PMID: 30414409 DOI: 10.1016/j.ajpath.2018.09.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 09/18/2018] [Accepted: 09/26/2018] [Indexed: 10/27/2022]
Abstract
The highly sulfated domains of heparan sulfate (HS), alias HS S-domains, are made up of repeated trisulfated disaccharide units [iduronic acid (2S)-glucosamine (NS, 6S)] and are selectively remodeled by extracellular endoglucosamine 6-sulfatases (Sulfs). Although HS S-domains are critical for signal transduction of several growth factors, their roles in amyloidoses are not yet fully understood. Herein, we found HS S-domains in the kidney of a patient with transthyretin amyloidosis. In in vitro assays with cells stably expressing human Sulfs, heparin, a structural analog of HS S-domains, promoted aggregation of transthyretin in an HS S-domain-dependent manner. Interactions of cells with transthyretin fibrils and cytotoxicity of these fibrils also depended on HS S-domains at the cell surface. Furthermore, glypican-5, encoded by the susceptibility gene for nephrotic syndrome GPC5, was found to be accumulated in the transthyretin amyloidosis kidney. Our study, thus, provides a novel insight into the pathologic roles of HS S-domains in amyloidoses, and we propose that enzymatic remodeling of HS chains by Sulfs may offer an effective approach to inhibiting formation and cytotoxicity of amyloid fibrils.
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Affiliation(s)
- Hirokazu Kameyama
- Department of Molecular Physical Pharmaceutics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Kenji Uchimura
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Japan; Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 CNRS, Université de Lille 1, Villeneuve d'Ascq, France
| | - Taro Yamashita
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kaori Kuwabara
- Department of Molecular Physical Pharmaceutics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | | | | | - Keiichiro Okuhira
- Department of Molecular Physical Pharmaceutics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Tomohiro Masuda
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomoki Kosugi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takashi Ohgita
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroyuki Saito
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kazuchika Nishitsuji
- Department of Biochemistry, Wakayama Medical University, Wakayama, Japan; Department of Pathology and Laboratory Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
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14
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Xin Y, Wang X, Luo L, Meng F. Conformation-Dependent Manipulation of Human Islet Amyloid Polypeptide Fibrillation by Shiitake-Derived Lentinan. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31069-31079. [PMID: 30148596 DOI: 10.1021/acsami.8b11078] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Misfolding and aggregation of human islet amyloid polypeptide (hIAPP) into fibrils are important contributions to the pathology of type 2 diabetes. Developing effective inhibitors of protein aggregation and fibrillation has been considered a promising therapeutic approach to preventing and treating type 2 diabetes. Herein, we report that Shiitake-derived polysaccharide lentinan manipulates in vitro hIAPP fibrillation and modulates IAPP-induced cytotoxicity in a conformation-dependent manner. In its triple-helical conformation, lentinan effectively inhibits hIAPP fibrillation, either in bulk solution or in the presence of lipid membrane, suppresses reactive oxygen species (ROS) generation, and attenuates hIAPP-induced cell toxicity. In contrast, lentinan accelerates hIAPP aggregation when it exists in a random-coil conformation and shows no suppression on hIAPP-mediated ROS production. Further investigation shows that the interaction between triple-helical lentinan and monomeric hIAPP is more favorable than the intermolecular binding of hIAPP, which redirects hIAPP aggregates to discrete nontoxic nanocomposites. To the best of our knowledge, this is the first time to report a conformation-dependent inhibition of hIAPP aggregation, which will provide new insights for our understanding of the manipulation mechanisms on hIAPP by natural polysaccharides and open a new avenue for designing and screening potential amyloid inhibitors against type 2 diabetes.
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Affiliation(s)
- Yanru Xin
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Xiuxia Wang
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Liang Luo
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
- Wuhan Institute of Biotechnology , Wuhan 430075 , China
| | - Fanling Meng
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
- Wuhan Institute of Biotechnology , Wuhan 430075 , China
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15
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Heparan sulfate S-domains and extracellular sulfatases (Sulfs): their possible roles in protein aggregation diseases. Glycoconj J 2018; 35:387-396. [PMID: 30003471 DOI: 10.1007/s10719-018-9833-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/25/2018] [Accepted: 07/04/2018] [Indexed: 10/28/2022]
Abstract
Highly sulfated domains of heparan sulfate (HS), also known as HS S-domains, consist of repeated trisulfated disaccharide units [iduronic acid (2S)-glucosamine (NS, 6S)-]. The expression of HS S-domains at the cell surface is determined by two mechanisms: tightly regulated biosynthetic machinery and enzymatic remodeling by extracellular endoglucosamine 6-sulfatases, Sulf-1 and Sulf-2. Intracellular or extracellular deposits of misfolded and aggregated proteins are characteristic of protein aggregation diseases. Although proteins can aggregate alone, deposits of protein aggregates in vivo contain a number of proteinaceous and non-protein components. HS S-domains are one non-protein component of these aggregated deposits. HS S-domains are considered to be critical for signal transduction of several growth factors and several disease conditions, such as tumor progression, but their roles in protein aggregation diseases are not yet fully understood. This review summarizes the current understanding of the possible roles of HS S-domains and Sulfs in the formation and cytotoxicity of protein aggregates.
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16
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Maïza A, Chantepie S, Vera C, Fifre A, Huynh MB, Stettler O, Ouidja MO, Papy-Garcia D. The role of heparan sulfates in protein aggregation and their potential impact on neurodegeneration. FEBS Lett 2018; 592:3806-3818. [PMID: 29729013 DOI: 10.1002/1873-3468.13082] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/21/2018] [Accepted: 02/22/2018] [Indexed: 12/29/2022]
Abstract
Neurodegenerative disorders, such as Alzheimer's, Parkinson's, and prion diseases, are directly linked to the formation and accumulation of protein aggregates in the brain. These aggregates, principally made of proteins or peptides that clamp together after acquisition of β-folded structures, also contain heparan sulfates. Several lines of evidence suggest that heparan sulfates centrally participate in the protein aggregation process. In vitro, they trigger misfolding, oligomerization, and fibrillation of amyloidogenic proteins, such as Aβ, tau, α-synuclein, prion protein, etc. They participate in the stabilization of protein aggregates, protect them from proteolysis, and act as cell-surface receptors for the cellular uptake of proteopathic seeds during their spreading. This review focuses attention on the importance of heparan sulfates in protein aggregation in brain disorders including Alzheimer's, Parkinson's, and prion diseases. The presence of these sulfated polysaccharides in protein inclusions in vivo and their capacity to trigger protein aggregation in vitro strongly suggest that they might play critical roles in the neurodegenerative process. Further advances in glyco-neurobiology will improve our understanding of the molecular and cellular mechanisms leading to protein aggregation and neurodegeneration.
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Affiliation(s)
- Auriane Maïza
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Sandrine Chantepie
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Cecilia Vera
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Alexandre Fifre
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Minh Bao Huynh
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Olivier Stettler
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Mohand Ouidir Ouidja
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
| | - Dulce Papy-Garcia
- Cell Growth, Tissue Repair and Regeneration (CRRET), UPEC EA 4397/ERL CNRS 9215, Université Paris Est Créteil, Université Paris Est, Créteil, France
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17
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Townsend D, Hughes E, Akien G, Stewart KL, Radford SE, Rochester D, Middleton DA. Epigallocatechin-3-gallate remodels apolipoprotein A-I amyloid fibrils into soluble oligomers in the presence of heparin. J Biol Chem 2018; 293:12877-12893. [PMID: 29853648 PMCID: PMC6102129 DOI: 10.1074/jbc.ra118.002038] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 05/25/2018] [Indexed: 11/06/2022] Open
Abstract
Amyloid deposits of WT apolipoprotein A-I (apoA-I), the main protein component of high-density lipoprotein, accumulate in atherosclerotic plaques where they may contribute to coronary artery disease by increasing plaque burden and instability. Using CD analysis, solid-state NMR spectroscopy, and transmission EM, we report here a surprising cooperative effect of heparin and the green tea polyphenol (-)-epigallocatechin-3-gallate (EGCG), a known inhibitor and modulator of amyloid formation, on apoA-I fibrils. We found that heparin, a proxy for glycosaminoglycan (GAG) polysaccharides that co-localize ubiquitously with amyloid in vivo, accelerates the rate of apoA-I formation from monomeric protein and associates with insoluble fibrils. Mature, insoluble apoA-I fibrils bound EGCG (KD = 30 ± 3 μm; Bmax = 40 ± 3 μm), but EGCG did not alter the kinetics of apoA-I amyloid assembly from monomer in the presence or absence of heparin. EGCG selectively increased the mobility of specific backbone and side-chain sites of apoA-I fibrils formed in the absence of heparin, but the fibrils largely retained their original morphology and remained insoluble. By contrast, fibrils formed in the presence of heparin were mobilized extensively by the addition of equimolar EGCG, and the fibrils were remodeled into soluble 20-nm-diameter oligomers with a largely α-helical structure that were nontoxic to human umbilical artery endothelial cells. These results argue for a protective effect of EGCG on apoA-I amyloid associated with atherosclerosis and suggest that EGCG-induced remodeling of amyloid may be tightly regulated by GAGs and other amyloid co-factors in vivo, depending on EGCG bioavailability.
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Affiliation(s)
- David Townsend
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB
| | - Eleri Hughes
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB
| | - Geoffrey Akien
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB
| | - Katie L Stewart
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - David Rochester
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB
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18
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Unravelling the inhibitory activity of Chlamydomonas reinhardtii sulfated polysaccharides against α-Synuclein fibrillation. Sci Rep 2018; 8:5692. [PMID: 29632314 PMCID: PMC5890252 DOI: 10.1038/s41598-018-24079-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 03/26/2018] [Indexed: 01/10/2023] Open
Abstract
α-Synuclein (α-Syn) is an intrinsically disordered presynaptic protein, whose aggregation is critically involved in Parkinson’s disease (PD). Many of the currently available drugs for the treatment of PD are not sufficiently effective in preventing progress of the disease and have multiple side-effects. With this background, efficient drug candidates, sulfated polysaccharides from Chlamydomonas reinhardtii (Cr-SPs) were isolated and investigated for their effect on inhibition of α-Syn fibrillation and dissolution of preformed α-Syn fibrillar structures through a combination of spectroscopic and microscopic techniques. The kinetics of α-Syn fibrillation demonstrates that Cr-SPs are very effective in inhibiting α-Syn fibrillation. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis gel-image shows presence of soluble protein in the presence of Cr-SPs after completion of the fibrillation process. The morphological changes associated with fibrillation monitored by transmission electron microscopy showed that Cr-SPs efficiently bind with α-Syn and delay the conversion of α-helical intermediate into β-sheet rich structures. Cr-SPs are also effective even if onset of α-Syn fibrillation has already started and they also have the ability to dissolve pre-formed fibrils. Thus, the current work has substantial therapeutic implications towards unlocking the immense potential of algal products to function as alternative therapeutic agents against PD and other protein aggregation related disorders.
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19
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Li Y, Li ZX, Jin T, Wang ZY, Zhao P. Tau Pathology Promotes the Reorganization of the Extracellular Matrix and Inhibits the Formation of Perineuronal Nets by Regulating the Expression and the Distribution of Hyaluronic Acid Synthases. J Alzheimers Dis 2018; 57:395-409. [PMID: 28234253 PMCID: PMC5366250 DOI: 10.3233/jad-160804] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hyaluronic acid (HA) is the backbone of the extracellular matrix (ECM) and provides biochemical and physical support to aggrecan-based perineuronal nets (PNNs), which are associated with the selective vulnerability of neurons in Alzheimer's disease (AD). Here, we showed that HA synthases (HASs), including Has1, Has2, and Has3, were widely expressed in murine central nervous system. All types of HASs were localized to cell bodies of neurons; only Has1 existed in the membranes of neural axons. By using TauP301S transgenic (Tg) mouse model, we found that the axonal-localization of Has1 was abolished in TauP301S overexpressed mouse brain, and the redistribution of Has1 was also observed in human AD brains, suggesting that the localization of Has1 is dependent on intact microtubules which are regulated partially by the phosphorylation and dephosphorylation cycles of tau proteins. Furthermore, Has1 was reduced and Has3 was increased in TauP301S Tg mouse brain, resulting in the upregulation of shorter-chain HA in the ECM. These findings suggest that by abolishing the axonal-localization of Has1 and promoting the expression of Has3 and the synthesis of shorter-chain HA, the tau pathology breaks the balance of ECM components, promotes the reorganization of the ECM, and inhibits the formation of PNNs in the hippocampus, and then regulates neuronal plasticity during the progression of AD.
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Affiliation(s)
| | | | | | - Zhan-You Wang
- Correspondence to: Zhan-You Wang and Pu Zhao, M.D., Ph.D., College of Life and Health Sciences, Northeastern University, 3-11 Wen Hua Road, Shenyang 110819, China. Tel.: +86 13352453082; E-mails: (P. Zhao); (Z.-Y Wang)
| | - Pu Zhao
- Correspondence to: Zhan-You Wang and Pu Zhao, M.D., Ph.D., College of Life and Health Sciences, Northeastern University, 3-11 Wen Hua Road, Shenyang 110819, China. Tel.: +86 13352453082; E-mails: (P. Zhao); (Z.-Y Wang)
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20
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Ow SY, Bekard I, Dunstan DE. Effect of natural biopolymers on amyloid fibril formation and morphology. Int J Biol Macromol 2018; 106:30-38. [DOI: 10.1016/j.ijbiomac.2017.07.171] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 07/20/2017] [Accepted: 07/29/2017] [Indexed: 10/19/2022]
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21
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Nasr SH, Kouyoumdjian H, Mallett C, Ramadan S, Zhu DC, Shapiro EM, Huang X. Detection of β-Amyloid by Sialic Acid Coated Bovine Serum Albumin Magnetic Nanoparticles in a Mouse Model of Alzheimer's Disease. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:10.1002/smll.201701828. [PMID: 29134771 PMCID: PMC5773361 DOI: 10.1002/smll.201701828] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 09/27/2017] [Indexed: 05/04/2023]
Abstract
The accumulation and formation of β-amyloid (Aβ) plaques in the brain are distinctive pathological hallmarks of Alzheimer's disease (AD). Designing nanoparticle (NP) contrast agents capable of binding with Aβ highly selectively can potentially facilitate early detection of AD. However, a significant obstacle is the blood brain barrier (BBB), which can preclude the entrance of NPs into the brain for Aβ binding. In this work, bovine serum albumin (BSA) coated NPs are decorated with sialic acid (NP-BSAx -Sia) to overcome the challenges in Aβ imaging in vivo. The NP-BSAx -Sia is biocompatible with high magnetic relaxivities, suggesting that they are suitable contrast agents for magnetic resonance imaging (MRI). The NP-BSAx -Sia binds with Aβ in a sialic acid dependent manner with high selectivities toward Aβ deposited on brains and cross the BBB in an in vitro model. The abilities of these NPs to detect Aβ in vivo in human AD transgenic mice by MRI are evaluated without the need to coinject mannitol to increase BBB permeability. T2 *-weighted MRI shows that Aβ plaques in mouse brains can be detected as aided by NP-BSAx -Sia, which is confirmed by histological analysis. Thus, NP-BSAx -Sia is a promising new tool for noninvasive in vivo detection of Aβ plaques.
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Affiliation(s)
- Seyedmehdi Hossaini Nasr
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Hovig Kouyoumdjian
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
- Department of Chemistry, York University, 4700 Keele Street, Chemistry Building 350, Toronto, ON, M3J 1P3 T, Canada
| | - Christiane Mallett
- Department of Radiology, Michigan State University, East Lansing, MI, 48824, USA
| | - Sherif Ramadan
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
- Chemistry Department, Faculty of Science, Benha University, Benha, Qaliobiya, 13518, Egypt
| | - David C Zhu
- Department of Radiology, Michigan State University, East Lansing, MI, 48824, USA
| | - Erik M Shapiro
- Department of Radiology, Michigan State University, East Lansing, MI, 48824, USA
- Department of Biomedical Engineering and Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Xuefei Huang
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
- Department of Biomedical Engineering and Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, 48824, USA
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22
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Nitani A, Muta H, Adachi M, So M, Sasahara K, Sakurai K, Chatani E, Naoe K, Ogi H, Hall D, Goto Y. Heparin-dependent aggregation of hen egg white lysozyme reveals two distinct mechanisms of amyloid fibrillation. J Biol Chem 2017; 292:21219-21230. [PMID: 29101231 DOI: 10.1074/jbc.m117.813097] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/19/2017] [Indexed: 01/22/2023] Open
Abstract
Heparin, a biopolymer possessing high negative charge density, is known to accelerate amyloid fibrillation by various proteins. Using hen egg white lysozyme, we studied the effects of heparin on protein aggregation at low pH, raised temperature, and applied ultrasonic irradiation, conditions under which amyloid fibrillation was promoted. Heparin exhibited complex bimodal concentration-dependent effects, either accelerating or inhibiting fibrillation at pH 2.0 and 60 °C. At concentrations lower than 20 μg/ml, heparin accelerated fibrillation through transient formation of hetero-oligomeric aggregates. Between 0.1 and 10 mg/ml, heparin rapidly induced amorphous heteroaggregation with little to no accompanying fibril formation. Above 10 mg/ml, heparin again induced fibrillation after a long lag time preceded by oligomeric aggregate formation. Compared with studies performed using monovalent and divalent anions, the results suggest two distinct mechanisms of heparin-induced fibrillation. At low heparin concentrations, initial hen egg white lysozyme cluster formation and subsequent fibrillation is promoted by counter ion binding and screening of repulsive charges. At high heparin concentrations, fibrillation is caused by a combination of salting out and macromolecular crowding effects probably independent of protein net charge. Both fibrillation mechanisms compete against amorphous aggregation, producing a complex heparin concentration-dependent phase diagram. Moreover, the results suggest an active role for amorphous oligomeric aggregates in triggering fibrillation, whereby breakdown of supersaturation takes place through heterogeneous nucleation of amyloid on amorphous aggregates.
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Affiliation(s)
- Ayame Nitani
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Hiroya Muta
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masayuki Adachi
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masatomo So
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Kenji Sasahara
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Kazumasa Sakurai
- Institute of Advanced Technology, Kindai University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan
| | - Eri Chatani
- Department of Chemistry, Graduate School of Science, Kobe University, Hyogo 657-8501, Japan
| | - Kazumitsu Naoe
- National Institute of Technology, Nara College, Nara 639-1080, Japan
| | - Hirotsugu Ogi
- Graduate School of Engineering, Suita, Osaka 565-0871, Japan, and
| | - Damien Hall
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.,Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Yuji Goto
- From the Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan,
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23
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Nanoelectrical characterization of amyloid-β42 aggregates via Kelvin probe force microscopy. Macromol Res 2017. [DOI: 10.1007/s13233-017-5155-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Stewart KL, Hughes E, Yates EA, Middleton DA, Radford SE. Molecular Origins of the Compatibility between Glycosaminoglycans and Aβ40 Amyloid Fibrils. J Mol Biol 2017; 429:2449-2462. [PMID: 28697887 PMCID: PMC5548265 DOI: 10.1016/j.jmb.2017.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/04/2017] [Accepted: 07/06/2017] [Indexed: 10/25/2022]
Abstract
The Aβ peptide forms extracellular plaques associated with Alzheimer's disease. In addition to protein fibrils, amyloid plaques also contain non-proteinaceous components, including glycosaminoglycans (GAGs). We have shown previously that the GAG low-molecular-weight heparin (LMWH) binds to Aβ40 fibrils with a three-fold-symmetric (3Q) morphology with higher affinity than Aβ40 fibrils in alternative structures, Aβ42 fibrils, or amyloid fibrils formed from other sequences. Solid-state NMR analysis of the GAG-3Q fibril complex revealed an interaction site at the corners of the 3Q fibril structure, but the origin of the binding specificity remained obscure. Here, using a library of short heparin polysaccharides modified at specific sites, we show that the N-sulfate or 6-O-sulfate of glucosamine, but not the 2-O-sulfate of iduronate within heparin is required for 3Q binding, indicating selectivity in the interactions of the GAG with the fibril that extends beyond general electrostatic complementarity. By creating 3Q fibrils containing point substitutions in the amino acid sequence, we also show that charged residues at the fibril three-fold apices provide the majority of the binding free energy, while charged residues elsewhere are less critical for binding. The results indicate, therefore, that LMWH binding to 3Q fibrils requires a precise molecular complementarity of the sulfate moieties on the GAG and charged residues displayed on the fibril surface. Differences in GAG binding to fibrils with distinct sequence and/or structure may thus contribute to the diverse etiology and progression of amyloid diseases.
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Affiliation(s)
- Katie L Stewart
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Eleri Hughes
- Department of Chemistry, University of Lancaster, Lancaster LA1 4YB, UK
| | - Edwin A Yates
- Department of Biochemistry, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - David A Middleton
- Department of Chemistry, University of Lancaster, Lancaster LA1 4YB, UK.
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK.
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25
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Abstract
Heparin is one of the oldest drugs, which nevertheless remains in widespread clinical use as an inhibitor of blood coagulation. The history of its identification a century ago unfolded amid one of the most fascinating scientific controversies turning around the distribution of credit for its discovery. The composition, purification and structure-function relationship of this naturally occurring glycosaminoglycan regarding its classical role as anticoagulant will be dealt with before proceeding to discuss its therapeutic potential in, among other, inflammatory and infectious disease, cancer treatment, cystic fibrosis and Alzheimer's disease. The first bibliographic reference hit using the words 'nanomedicine' and 'heparin' is as recent as 2008. Since then, nanomedical applications of heparin have experienced an exponential growth that will be discussed in detail, with particular emphasis on its antimalarial activity. Some of the most intriguing potential applications of heparin nanomedicines will be exposed, such as those contemplating the delivery of drugs to the mosquito stages of malaria parasites.
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Affiliation(s)
| | - Elena Lantero
- Nanomalaria Group, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, ES-08028 Barcelona, Spain.,Barcelona Institute for Global Health (ISGlobal), Barcelona Center for International Health Research (CRESIB, Hospital Clínic-Universitat de Barcelona), Rosselló 149-153, ES-08036 Barcelona, Spain
| | - Xavier Fernàndez-Busquets
- Nanomalaria Group, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, ES-08028 Barcelona, Spain.,Barcelona Institute for Global Health (ISGlobal), Barcelona Center for International Health Research (CRESIB, Hospital Clínic-Universitat de Barcelona), Rosselló 149-153, ES-08036 Barcelona, Spain.,Nanoscience & Nanotechnology Institute (IN2UB), University of Barcelona, Martí i Franquès 1, ES-08028 Barcelona, Spain
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26
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Abstract
Aggregation of the amyloid-β (Aβ) peptide is strongly correlated with Alzheimer's disease (AD). Recent research has improved our understanding of the kinetics of amyloid fibril assembly and revealed new details regarding different stages in plaque formation. Presently, interest is turning toward studying this process in a holistic context, focusing on cellular components which interact with the Aβ peptide at various junctures during aggregation, from monomer to cross-β amyloid fibrils. However, even in isolation, a multitude of factors including protein purity, pH, salt content, and agitation affect Aβ fibril formation and deposition, often producing complicated and conflicting results. The failure of numerous inhibitors in clinical trials for AD suggests that a detailed examination of the complex interactions that occur during plaque formation, including binding of carbohydrates, lipids, nucleic acids, and metal ions, is important for understanding the diversity of manifestations of the disease. Unraveling how a variety of key macromolecular modulators interact with the Aβ peptide and change its aggregation properties may provide opportunities for developing therapies. Since no protein acts in isolation, the interplay of these diverse molecules may differentiate disease onset, progression, and severity, and thus are worth careful consideration.
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Affiliation(s)
- Katie L Stewart
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK.
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK.
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27
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Nishitsuji K, Uchimura K. Sulfated glycosaminoglycans in protein aggregation diseases. Glycoconj J 2017; 34:453-466. [DOI: 10.1007/s10719-017-9769-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/06/2017] [Accepted: 03/27/2017] [Indexed: 01/01/2023]
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28
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Smith PD, Coulson-Thomas VJ, Foscarin S, Kwok JCF, Fawcett JW. "GAG-ing with the neuron": The role of glycosaminoglycan patterning in the central nervous system. Exp Neurol 2015; 274:100-14. [PMID: 26277685 DOI: 10.1016/j.expneurol.2015.08.004] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 07/17/2015] [Accepted: 08/06/2015] [Indexed: 01/17/2023]
Abstract
Proteoglycans (PGs) are a diverse family of proteins that consist of one or more glycosaminoglycan (GAG) chains, covalently linked to a core protein. PGs are major components of the extracellular matrix (ECM) and play critical roles in development, normal function and damage-response of the central nervous system (CNS). GAGs are classified based on their disaccharide subunits, into the following major groups: chondroitin sulfate (CS), heparan sulfate (HS), heparin (HEP), dermatan sulfate (DS), keratan sulfate (KS) and hyaluronic acid (HA). All except HA are modified by sulfation, giving GAG chains specific charged structures and binding properties. While significant neuroscience research has focused on the role of one PG family member, chondroitin sulfate proteoglycan (CSPG), there is ample evidence in support of a role for the other PGs in regulating CNS function in normal and pathological conditions. This review discusses the role of all the identified PG family members (CS, HS, HEP, DS, KS and HA) in normal CNS function and in the context of pathology. Understanding the pleiotropic roles of these molecules in the CNS may open the door to novel therapeutic strategies for a number of neurological conditions.
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Affiliation(s)
- Patrice D Smith
- John van Geest Centre for Brain Repair, University of Cambridge, Forvie Site, Robinson Way, Cambridge, UK; Department of Neuroscience, Carleton University, Ottawa, ON, Canada.
| | - Vivien J Coulson-Thomas
- John van Geest Centre for Brain Repair, University of Cambridge, Forvie Site, Robinson Way, Cambridge, UK
| | - Simona Foscarin
- John van Geest Centre for Brain Repair, University of Cambridge, Forvie Site, Robinson Way, Cambridge, UK
| | - Jessica C F Kwok
- John van Geest Centre for Brain Repair, University of Cambridge, Forvie Site, Robinson Way, Cambridge, UK
| | - James W Fawcett
- John van Geest Centre for Brain Repair, University of Cambridge, Forvie Site, Robinson Way, Cambridge, UK.
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29
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Lv Y, Yang B, Zhao X, Zhang J, Yu G. Structural Characterization of a Hybrid Carrageenan-Like Sulfated Galactan from a Marine Red Alga Furcellaria lumbricalis. Methods Mol Biol 2015; 1308:325-346. [PMID: 26108516 DOI: 10.1007/978-1-4939-2684-8_21] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Carrageenans are sulfated galactan isolated from marine red algae with different disaccharide forms. There are also some hybrid carrageenan-like oligomers, which are reported to possess a number of bioactivities. Here, we describe a method to study the structural characterization of a carrageenan-like sulfated galactan FB1 extracted from the red seaweed Furcellaria lumbricalis. We show the process of the general analysis of FB1, including the molecular weight, sulfate content, total sugar content, protein content, and 3,6-anhydrogalactose (3,6-AnG) content analyses. The fine structure identification methods, including desulfation and methylation, nuclear magnetic resonance (NMR), and electrospray ionization collision induced dissociation tandem mass spectrometry (ES-CID-MS/MS), are also described in detail.
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Affiliation(s)
- Youjing Lv
- Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, Ocean University of China, 5 Yu Shan Rd., Qingdao, 266003, P.R. China
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30
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Yamada M, Hara S, Yamada T, Katagiri F, Hozumi K, Nomizu M. Double-stranded DNA stereoselectively promotes aggregation of amyloid-like fibrils and generates peptide/DNA matrices. Biopolymers 2014; 102:465-72. [DOI: 10.1002/bip.22571] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 09/22/2014] [Accepted: 09/27/2014] [Indexed: 01/09/2023]
Affiliation(s)
- Masanori Yamada
- Department of Chemistry, Faculty of Science; Okayama University of Science; Ridaicho, Kita-ku Okayama 700-0005 Japan
| | - Sachiko Hara
- Department of Chemistry, Faculty of Science; Okayama University of Science; Ridaicho, Kita-ku Okayama 700-0005 Japan
| | - Tetsuya Yamada
- Research Faculty of Agriculture; Hokkaido University; Sapporo 060-8589 Japan
| | - Fumihiko Katagiri
- School of Pharmacy; Tokyo University of Pharmacy and Life Sciences; Hachioji Tokyo 192-0392 Japan
| | - Kentaro Hozumi
- School of Pharmacy; Tokyo University of Pharmacy and Life Sciences; Hachioji Tokyo 192-0392 Japan
| | - Motoyoshi Nomizu
- School of Pharmacy; Tokyo University of Pharmacy and Life Sciences; Hachioji Tokyo 192-0392 Japan
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31
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Ow SY, Dunstan DE. A brief overview of amyloids and Alzheimer's disease. Protein Sci 2014; 23:1315-31. [PMID: 25042050 DOI: 10.1002/pro.2524] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 07/10/2014] [Accepted: 07/11/2014] [Indexed: 01/29/2023]
Abstract
Amyloid fibrils are self-assembled fibrous protein aggregates that are associated with a number of presently incurable diseases such as Alzheimer's and Parkinson's disease. Millions of people worldwide suffer from amyloid diseases. This review summarizes the unique cross-β structure of amyloid fibrils, morphological variations, the kinetics of amyloid fibril formation, and the cytotoxic effects of these fibrils and oligomers. Alzheimer's disease is also explored as an example of an amyloid disease to show the various approaches to treat these amyloid diseases. Finally, this review investigates the nanotechnological and biological applications of amyloid fibrils; as well as a summary of the typical biological pathways involved in the disposal of amyloid fibrils and their precursors.
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Affiliation(s)
- Sian-Yang Ow
- Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, Victoria, Australia
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32
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33
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Sheynis T, Friediger A, Xue WF, Hellewell AL, Tipping KW, Hewitt EW, Radford SE, Jelinek R. Aggregation modulators interfere with membrane interactions of β2-microglobulin fibrils. Biophys J 2014; 105:745-55. [PMID: 23931322 DOI: 10.1016/j.bpj.2013.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/20/2013] [Accepted: 06/04/2013] [Indexed: 10/26/2022] Open
Abstract
Amyloid fibril accumulation is a pathological hallmark of several devastating disorders, including Alzheimer's disease, prion diseases, type II diabetes, and others. Although the molecular factors responsible for amyloid pathologies have not been deciphered, interactions of misfolded proteins with cell membranes appear to play important roles in these disorders. Despite increasing evidence for the involvement of membranes in amyloid-mediated cytotoxicity, the pursuit for therapeutic strategies has focused on preventing self-assembly of the proteins comprising the amyloid plaques. Here we present an investigation of the impact of fibrillation modulators upon membrane interactions of β2-microglobulin (β2m) fibrils. The experiments reveal that polyphenols (epigallocatechin gallate, bromophenol blue, and resveratrol) and glycosaminoglycans (heparin and heparin disaccharide) differentially affect membrane interactions of β2m fibrils measured by dye-release experiments, fluorescence anisotropy of labeled lipid, and confocal and cryo-electron microscopies. Interestingly, whereas epigallocatechin gallate and heparin prevent membrane damage as judged by these assays, the other compounds tested had little, or no, effect. The results suggest a new dimension to the biological impact of fibrillation modulators that involves interference with membrane interactions of amyloid species, adding to contemporary strategies for combating amyloid diseases that focus on disruption or remodeling of amyloid aggregates.
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Affiliation(s)
- Tania Sheynis
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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34
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Burnside ER, Bradbury EJ. Review: Manipulating the extracellular matrix and its role in brain and spinal cord plasticity and repair. Neuropathol Appl Neurobiol 2014; 40:26-59. [DOI: 10.1111/nan.12114] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 12/20/2013] [Indexed: 12/17/2022]
Affiliation(s)
- E. R. Burnside
- King's College London; Regeneration Group; The Wolfson Centre for Age-Related Diseases; Guy's Campus; London UK
| | - E. J. Bradbury
- King's College London; Regeneration Group; The Wolfson Centre for Age-Related Diseases; Guy's Campus; London UK
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35
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Minsky BB, Zheng B, Dubin PL. Inhibition of antithrombin and bovine serum albumin native state aggregation by heparin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:278-287. [PMID: 24313340 DOI: 10.1021/la4039232] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Protein native state aggregation, a major problem in pharmaceutical and biological processes, has been addressed pharmacologically by the addition of protein-binding excipients. Heparin (Hp), a highly sulfated polysaccharide, interacts with numerous proteins with moderate to high affinity, but reports about its effect on protein aggregation are contradictory. We studied the pH dependence of the aggregation of antithrombin (AT) and bovine serum albumin (BSA) in the presence and absence of heparin. High-precision turbidimetry showed strong aggregation for both AT and BSA in I = 10 mM NaCl, conditions at which electrostatically driven Hp binding and aggregation both occur, with more obvious aggregation of heparin-free AT appearing as larger aggregate size. Aggregation of AT was dramatically inhibited at Hp: protein 6:1 (mole ratio); however, the effect at 0.5:1 Hp:protein was greater for BSA. Frontal analysis capillary electrophoresis showed a much larger equilibrium association constant Kobs between Hp and AT, in accord with the onset of Hp binding at a higher pH; both effects are explained by the higher charge density of the positive domain for AT as revealed by modeling with DelPhi. The corresponding modeling images showed that these domains persist at high salt only for AT, consistent with the 160-fold drop in Kobs at 100 mM salt for BSA-Hp binding. The smaller inhibition effect for AT arises from the tendency of its uncomplexed monomer to form larger aggregates more rapidly, but the stronger binding of Hp to AT does not facilitate Hp-induced aggregate dissolution which occurs more readily for BSA. This can be attributed to the higher density of AT aggregates evidenced by higher fractal dimensions. Differences between inhibition and reversal by Hp arise because the former may depend on the stage at which Hp enters the aggregation process and the latter on aggregate size and morphology.
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Affiliation(s)
- Burcu Baykal Minsky
- Department of Chemistry, University of Massachusetts , Amherst, Massachusetts, 01003, United States
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36
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Cecchi C, Stefani M. The amyloid-cell membrane system. The interplay between the biophysical features of oligomers/fibrils and cell membrane defines amyloid toxicity. Biophys Chem 2013; 182:30-43. [PMID: 23820236 DOI: 10.1016/j.bpc.2013.06.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/03/2013] [Accepted: 06/03/2013] [Indexed: 12/14/2022]
Abstract
Amyloid cytotoxicity, structure and polymorphisms are themes of increasing importance. Present knowledge considers any peptide/protein able to undergo misfolding and aggregation generating intrinsically cytotoxic amyloids. It also describes growth and structure of amyloid fibrils and their possible disassembly, whereas reduced information is available on oligomer structure. Recent research has highlighted the importance of the environmental conditions as determinants of the amyloid polymorphisms and cytotoxicity. Another body of evidence describes chemical or biological surfaces as key sites of protein misfolding and aggregation or of interaction with amyloids and the resulting biochemical modifications inducing cell functional/viability impairment. In particular, the membrane lipid composition appears to modulate cell response to toxic amyloids, thus contributing to explain the variable vulnerability to the same amyloids of different cell types. Finally, a recent view describes amyloid toxicity as an emerging property dependent on a complex interplay between the biophysical features of early aggregates and the interacting cell membranes taken as a whole system.
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Affiliation(s)
- Cristina Cecchi
- Department of Biomedical Experimental and Clinical Sciences and Research Centre on the Molecular Basis of Neurodegeneration, University of Florence, Florence, Italy
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37
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Kouyoumdjian H, Zhu DC, El-Dakdouki MH, Lorenz K, Chen J, Li W, Huang X. Glyconanoparticle aided detection of β-amyloid by magnetic resonance imaging and attenuation of β-amyloid induced cytotoxicity. ACS Chem Neurosci 2013; 4:575-84. [PMID: 23590250 PMCID: PMC3629742 DOI: 10.1021/cn3002015] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 01/07/2013] [Indexed: 01/01/2023] Open
Abstract
The development of a noninvasive method for the detection of Alzheimer's disease is of high current interest, which can be critical in early diagnosis and in guiding treatment of the disease. The aggregates of β-amyloid are a pathological hallmark of Alzheimer's disease. Carbohydrates such as gangliosides have been shown to play significant roles in initiation of amyloid aggregation. Herein, we report a biomimetic approach using superparamagnetic iron oxide glyconanoparticles to detect β-amyloid. The bindings of β-amyloid by the glyconanoparticles were demonstrated through several techniques including enzyme linked immunosorbent assay, gel electrophoresis, tyrosine fluorescence assay, and transmission electron microscopy. The superparamagnetic nature of the nanoparticles allowed easy detection of β-amyloid both in vitro and ex vivo by magnetic resonance imaging. Furthermore, the glyconanoparticles not only were nontoxic to SH-SY5Y neuroblastoma cells but also greatly reduced β-amyloid induced cytotoxicity to cells, highlighting the potential of these nanoparticles for detection and imaging of β-amyloid.
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Affiliation(s)
- Hovig Kouyoumdjian
- Department of Chemistry, 578 S. Shaw Lane, Room 426, Michigan State University, East Lansing, Michigan 48824,
United States
| | - David C. Zhu
- Departments
of Radiology and Psychology, Michigan State University, East Lansing, Michigan 48824, United States
| | - Mohammad H. El-Dakdouki
- Department of Chemistry, 578 S. Shaw Lane, Room 426, Michigan State University, East Lansing, Michigan 48824,
United States
| | - Kelly Lorenz
- Department of Chemistry, 578 S. Shaw Lane, Room 426, Michigan State University, East Lansing, Michigan 48824,
United States
| | - Jianjun Chen
- Department of Pharmaceutical Sciences, College
of Pharmacy, University of Tennessee Health Science Center, 847 Monroe Avenue, Memphis, Tennessee 38163, United States
| | - Wei Li
- Department of Pharmaceutical Sciences, College
of Pharmacy, University of Tennessee Health Science Center, 847 Monroe Avenue, Memphis, Tennessee 38163, United States
| | - Xuefei Huang
- Department of Chemistry, 578 S. Shaw Lane, Room 426, Michigan State University, East Lansing, Michigan 48824,
United States
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38
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Purification and characterization of D-Gal-6-sulfurylase from Eucheuma striatum. Carbohydr Polym 2013; 96:9-14. [PMID: 23688448 DOI: 10.1016/j.carbpol.2013.03.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 03/16/2013] [Accepted: 03/20/2013] [Indexed: 11/22/2022]
Abstract
D-Gal-6-sulfurylase catalyzing the conversion of μ-carrageenan into κ-carrageenan was extracted from Eucheuma striatum and purified by ammonium sulfate precipitation, hydrophobic interaction chromatography and ion exchange chromatography. The purified enzyme was a monomeric protein with a molecular mass of about 65 kDa as shown in SDS-PAGE. The maximum activity of the enzyme was observed at pH 7.0 and temperature 40°C. Km value for μ-carrageenan was 4.31 mM, and the corresponding Vmax was 0.17 mM min(-1). The carrageenan treated with 10 U of the purified enzyme exhibited 7.1-fold increase in gel strength with a removal of 30% sulfate groups. (1)H NMR spectral analysis of the control and enzyme treated carrageenan confirmed the conversion of μ- into κ-carrageenan and highlighted the specificity of Gal-6-sulfurylase for μ-carrageenan. This Gal-6-sulfurylase provides an eco-friendly and alternative for alkali treatment method to produce high gel strength κ-carrageenan.
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39
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Cui H, Freeman C, Jacobson GA, Small DH. Proteoglycans in the central nervous system: role in development, neural repair, and Alzheimer's disease. IUBMB Life 2013; 65:108-20. [PMID: 23297096 DOI: 10.1002/iub.1118] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 11/20/2012] [Indexed: 12/25/2022]
Abstract
Proteoglycans (PGs) are major components of the cell surface and extracellular matrix and play critical roles in development and maintenance of the central nervous system (CNS). PGs are a family of proteins, all of which contain a core protein to which glycosaminoglycan side chains are covalently attached. PGs possess diverse physiological roles, particularly in neural development, and are also implicated in the pathogenesis of neurodegenerative diseases such as Alzheimer's disease (AD). The main functions of PGs in the CNS are reviewed as are the roles of PGs in brain injury and in the development or treatment of AD.
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Affiliation(s)
- Hao Cui
- Menzies Research Institute Tasmania, University of Tasmania, Hobart, Tasmania, Australia
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40
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Structural features and cytotoxicity of amyloid oligomers: Implications in Alzheimer's disease and other diseases with amyloid deposits. Prog Neurobiol 2012; 99:226-45. [DOI: 10.1016/j.pneurobio.2012.03.002] [Citation(s) in RCA: 140] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 12/22/2022]
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41
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Yang SG, Wang SW, Zhao M, Zhang R, Zhou WW, Li YN, Su YJ, Zhang H, Yu XL, Liu RT. A peptide binding to the β-site of APP improves spatial memory and attenuates Aβ burden in Alzheimer's disease transgenic mice. PLoS One 2012; 7:e48540. [PMID: 23133641 PMCID: PMC3486805 DOI: 10.1371/journal.pone.0048540] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 09/26/2012] [Indexed: 12/15/2022] Open
Abstract
Amyloid precursor protein cleaving enzyme 1 (BACE1), an aspartyl protease, initiates processing of the amyloid precursor protein (APP) into β-amyloid (Aβ); the peptide likely contributes to development of Alzheimer’s disease (AD). BACE1 is an attractive therapeutic target for AD treatment, but it exhibits other physiological activities and has many other substrates besides APP. Thus, inhibition of BACE1 function may cause adverse side effects. Here, we present a peptide, S1, isolated from a peptide library that selectively inhibits BACE1 hydrolytic activity by binding to the β-proteolytic site on APP and Aβ N-terminal. The S1 peptide significantly reduced Aβ levels in vitro and in vivo and inhibited Aβ cytotoxicity in SH-SY5Y cells. When applied to APPswe/PS1dE9 double transgenic mice by intracerebroventricular injection, S1 significantly improved the spatial memory as determined by the Morris Water Maze, and also attenuated their Aβ burden. These results indicate that the dual-functional peptide S1 may have therapeutic potential for AD by both reducing Aβ generation and inhibiting Aβ cytotoxicity.
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Affiliation(s)
- Shi-gao Yang
- Tsinghua University School of Medicine, Haidian District, Beijing, China
| | - Shao-wei Wang
- Tsinghua University School of Medicine, Haidian District, Beijing, China
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Min Zhao
- Tsinghua University School of Medicine, Haidian District, Beijing, China
| | - Ran Zhang
- Tsinghua University School of Medicine, Haidian District, Beijing, China
| | - Wei-wei Zhou
- Tsinghua University School of Medicine, Haidian District, Beijing, China
| | - Ya-nan Li
- Tsinghua University School of Medicine, Haidian District, Beijing, China
- School of Life Sciences, Ningxia University, Yinchuan, China
| | - Ya-jing Su
- Tsinghua University School of Medicine, Haidian District, Beijing, China
- School of Life Sciences, Ningxia University, Yinchuan, China
| | - He Zhang
- Tsinghua University School of Medicine, Haidian District, Beijing, China
| | - Xiao-lin Yu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
- * E-mail: (RTL); (XLY)
| | - Rui-tian Liu
- Tsinghua University School of Medicine, Haidian District, Beijing, China
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
- * E-mail: (RTL); (XLY)
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42
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Xu L, Yao Z, Wu H, Wang F, Zhang S. The immune regulation of κ-carrageenan oligosaccharide and its desulfated derivatives on LPS-activated microglial cells. Neurochem Int 2012; 61:689-96. [DOI: 10.1016/j.neuint.2012.06.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 05/25/2012] [Accepted: 06/23/2012] [Indexed: 10/28/2022]
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43
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Hamley IW. The Amyloid Beta Peptide: A Chemist’s Perspective. Role in Alzheimer’s and Fibrillization. Chem Rev 2012; 112:5147-92. [DOI: 10.1021/cr3000994] [Citation(s) in RCA: 670] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- I. W. Hamley
- Department
of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD,
U.K
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44
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Huynh MB, Villares J, Díaz JES, Christiaans S, Carpentier G, Ouidja MO, Sissoeff L, Raisman-Vozari R, Papy-Garcia D. Glycosaminoglycans from aged human hippocampus have altered capacities to regulate trophic factors activities but not Aβ42 peptide toxicity. Neurobiol Aging 2011; 33:1005.e11-22. [PMID: 22035591 DOI: 10.1016/j.neurobiolaging.2011.09.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 09/12/2011] [Accepted: 09/17/2011] [Indexed: 10/15/2022]
Abstract
Glycosaminoglycans (GAGs) are major extracellular matrix components known to tightly regulate cell behavior by interacting with tissue effectors as trophic factors and other heparin binding proteins. Alterations of GAGs structures might thus modify the nature and extent of these interactions and alter tissue integrity. Here, we studied levels and composition of GAGs isolated from adult and aged human hippocampus and investigated if their changes can influence the function of important trophic factors and the Aβ42 peptide toxicity. Biochemical analyses showed that heparan sulfates are increased in the aged hippocampus. Moreover, GAGs from aged hippocampus showed altered capacities to regulate trophic factor activities without changing their capacities to protect cells from Aβ42 toxicity, compared to adult hippocampus GAGs. Structural alterations in GAGs from elderly were suggested by differential transcripts levels of key biosynthetic enzymes. C5-epimerase and 2-OST expressions were decreased while NDST-2 and 3-OST-4 were increased; in contrast, heparanase expression was unchanged. Results suggest that alteration of GAGs in hippocampus of aged subjects could participate to tissue impairment during aging.
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Affiliation(s)
- Minh Bao Huynh
- Laboratoire CRRET, CNRS EAC 7149, Faculté des Sciences et Technologie, Université Paris-Est, Créteil, France
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45
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Jha S, Patil SM, Gibson J, Nelson CE, Alder NN, Alexandrescu AT. Mechanism of amylin fibrillization enhancement by heparin. J Biol Chem 2011; 286:22894-904. [PMID: 21555785 DOI: 10.1074/jbc.m110.215814] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We characterized the interaction of amylin with heparin fragments of defined length, which model the glycosaminoglycan chains associated with amyloid deposits found in type 2 diabetes. Binding of heparin fragments to the positively charged N-terminal half of monomeric amylin depends on the concentration of negatively charged saccharides but is independent of oligosaccharide length. By contrast, amylin fibrillogenesis has a sigmoidal dependence on heparin fragment length, with an enhancement observed for oligosaccharides longer than four monomers and a leveling off of effects beyond 12 monomers. The length dependence suggests that the negatively charged helical structure of heparin electrostatically complements the positively charged surface of the fibrillar amylin cross-β structure. Fluorescence resonance energy transfer and total internal reflection fluorescence microscopy experiments indicate that heparin associates with amylin fibrils, rather than enhancing fibrillogenesis catalytically. Short heparin fragments containing two- or eight-saccharide monomers protect against amylin cytotoxicity toward a MIN6 mouse cell model of pancreatic β-cells.
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Affiliation(s)
- Suman Jha
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, Connecticut 06269-3125, USA
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46
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Bazar E, Sheynis T, Dorosz J, Jelinek R. Heparin Inhibits Membrane Interactions and Lipid-Induced Fibrillation of a Prion Amyloidogenic Determinant. Chembiochem 2011; 12:761-7. [DOI: 10.1002/cbic.201000486] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Indexed: 12/22/2022]
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47
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Yang B, Yu G, Zhao X, Ren W, Jiao G, Fang L, Wang Y, Du G, Tiller C, Girouard G, Barrow CJ, Ewart HS, Zhang J. Structural characterisation and bioactivities of hybrid carrageenan-like sulphated galactan from red alga Furcellaria lumbricalis. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.05.102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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48
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Komatsu H, Feingold-Link E, Sharp KA, Rastogi T, Axelsen PH. Intrinsic linear heterogeneity of amyloid β protein fibrils revealed by higher resolution mass-per-length determinations. J Biol Chem 2010; 285:41843-51. [PMID: 20940298 PMCID: PMC3009912 DOI: 10.1074/jbc.m110.165068] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 10/01/2010] [Indexed: 11/06/2022] Open
Abstract
Amyloid β proteins spontaneously form fibrils in vitro that vary in their thermodynamic stability and in morphological characteristics such as length, width, shape, longitudinal twist, and the number of component filaments. It is vitally important to determine which variant best represents the type of fibril that accumulates in Alzheimer disease. In the present study, the nature of morphological variation was examined by dark-field and transmission electron microscopy in a preparation of seeded amyloid β protein fibrils that formed at relatively low protein concentrations and exhibited remarkably high thermodynamic stability. The number of filaments comprising these fibrils changed frequently from two to six along their length, and these changes only became apparent when mass-per-length (MPL) determinations are made with sufficient resolution. The MPL results could be reproduced by a simple stochastic model with a single adjustable parameter. The presence of more than two primary filaments could not be discerned by transmission electron microscopy, and they had no apparent relationship to the longitudinal twist of the fibrils. However, the pitch of the twist was strongly affected by the pH of the negative stain. We conclude that highly stable amyloid fibrils may form in which a surprising amount of intrinsic linear heterogeneity may be obscured by MPL measurements of insufficient resolution, and by the negative stains used for imaging fibrils by electron microscopy.
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Affiliation(s)
| | | | | | | | - Paul H. Axelsen
- From the Departments of Pharmacology
- Biochemistry and Biophysics, and
- Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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Stefani M. Biochemical and biophysical features of both oligomer/fibril and cell membrane in amyloid cytotoxicity. FEBS J 2010; 277:4602-13. [PMID: 20977664 DOI: 10.1111/j.1742-4658.2010.07889.x] [Citation(s) in RCA: 147] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A great deal must still be learnt on the structural features of amyloid assemblies, particularly prefibrillar aggregates, and the relationship of the latter with amyloid cytotoxicity. Presently, it is recognized that the population of unstable, heterogeneous amyloid oligomers and protofibrils is mainly responsible for amyloid cytotoxicity. Conversely, mature fibrils are considered stable, harmless reservoirs of molecular species devoid of toxicity in the polymerized state. This view has been modified by recent reports showing that mature fibrils grown at different conditions can display different structural features and stabilities, possibly leading them to undergo disassembly with the leak of toxic oligomers. Fibril polymorphism is paralleled by oligomer polymorphism and both can be traced back to amyloid growth from differently destabilized monomers with distinct structural features at differing conditions. Recent research has started to unravel oligomer structural and biophysical features and the relationship between the latter and oligomer cytotoxicity. These data have led to the proposal that, together, both oligomer and membrane physical features determine the extent of oligomer-membrane interaction with the resulting disruption of membrane integrity and cell impairment. Such a view can help to explain the variable vulnerability of different cell types to the same amyloids and the lack of relationship between amyloid load and the severity of clinical symptoms. It also stresses the importance, for cell/tissue impairment, of the presence, in tissue, in addition to toxic oligomers, of fibrils conformers of reduced stability as a possible source of toxic oligomers, whose leakage can be favoured upon interaction with suitable surfaces or by other environmental conditions.
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Affiliation(s)
- Massimo Stefani
- Department of Biochemical Sciences, University of Florence, Florence, Italy.
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50
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Villar-Piqué A, Sabaté R, Lopera O, Gibert J, Torne JM, Santos M, Ventura S. Amyloid-like protein inclusions in tobacco transgenic plants. PLoS One 2010; 5:e13625. [PMID: 21049018 PMCID: PMC2964307 DOI: 10.1371/journal.pone.0013625] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Accepted: 10/01/2010] [Indexed: 11/19/2022] Open
Abstract
The formation of insoluble protein deposits in human tissues is linked to the onset of more than 40 different disorders, ranging from dementia to diabetes. In these diseases, the proteins usually self-assemble into ordered β-sheet enriched aggregates known as amyloid fibrils. Here we study the structure of the inclusions formed by maize transglutaminase (TGZ) in the chloroplasts of tobacco transplastomic plants and demonstrate that they have an amyloid-like nature. Together with the evidence of amyloid structures in bacteria and fungi our data argue that amyloid formation is likely a ubiquitous process occurring across the different kingdoms of life. The discovery of amyloid conformations inside inclusions of genetically modified plants might have implications regarding their use for human applications.
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Affiliation(s)
- Anna Villar-Piqué
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Raimon Sabaté
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Oriol Lopera
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB, Molecular Genetics Laboratory, Barcelona, Spain
| | - Jordi Gibert
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB, Molecular Genetics Laboratory, Barcelona, Spain
| | - Josep Maria Torne
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB, Molecular Genetics Laboratory, Barcelona, Spain
| | - Mireya Santos
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB, Molecular Genetics Laboratory, Barcelona, Spain
| | - Salvador Ventura
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain
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