1
|
Ha JH, Xu Y, Sekhon H, Zhao W, Wilkens S, Ren D, Loh SN. Mimicking kidney flow shear efficiently induces aggregation of LECT2, a protein involved in renal amyloidosis. J Biol Chem 2024; 300:107231. [PMID: 38537700 PMCID: PMC11040205 DOI: 10.1016/j.jbc.2024.107231] [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: 09/27/2023] [Revised: 02/20/2024] [Accepted: 03/15/2024] [Indexed: 04/09/2024] Open
Abstract
Aggregation of leukocyte cell-derived chemotaxin 2 (LECT2) causes ALECT2, a systemic amyloidosis that affects the kidney and liver. Previous studies established that LECT2 fibrillogenesis is accelerated by the loss of its bound zinc ion and stirring/shaking. These forms of agitation create heterogeneous shear conditions, including air-liquid interfaces that denature proteins, that are not present in the body. Here, we determined the extent to which a more physiological form of mechanical stress-shear generated by fluid flow through a network of narrow channels-drives LECT2 fibrillogenesis. To mimic blood flow through the kidney, where LECT2 and other proteins form amyloid deposits, we developed a microfluidic device consisting of progressively branched channels narrowing from 5 mm to 20 μm in width. Shear was particularly pronounced at the branch points and in the smallest capillaries. Aggregation was induced within 24 h by shear levels that were in the physiological range and well below those required to unfold globular proteins such as LECT2. EM images suggested the resulting fibril ultrastructures were different when generated by laminar flow shear versus shaking/stirring. Importantly, results from the microfluidic device showed the first evidence that the I40V mutation accelerated fibril formation and increased both the size and the density of the aggregates. These findings suggest that kidney-like flow shear, in combination with zinc loss, acts in combination with the I40V mutation to trigger LECT2 amyloidogenesis. These microfluidic devices may be of general use for uncovering mechanisms by which blood flow induces misfolding and amyloidosis of circulating proteins.
Collapse
Affiliation(s)
- Jeung-Hoi Ha
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Yikang Xu
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York, USA
| | - Harsimranjit Sekhon
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Wenhan Zhao
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York, USA
| | - Stephan Wilkens
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Dacheng Ren
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York, USA; Department of Civil and Environmental Engineering, Syracuse University, Syracuse, New York, USA; Department of Biology, Syracuse University, Syracuse, New York, USA.
| | - Stewart N Loh
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, New York, USA.
| |
Collapse
|
2
|
Chowdhury S, Sarkar N. Exploring the potential of amyloids in biomedical applications: A review. Biotechnol Bioeng 2024; 121:26-38. [PMID: 37822225 DOI: 10.1002/bit.28569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/31/2023] [Accepted: 09/24/2023] [Indexed: 10/13/2023]
Abstract
Amyloid is defined as a fibrous quaternary structure formed by assembling protein or peptide monomers into intermolecularly hydrogen linked β-sheets. There is a prevalent issue with protein aggregation and the buildup of amyloid molecules, which results in human neurological illnesses including Alzheimer's and Parkinson's. But it is now evident that many organisms, like bacteria, fungi as well as humans, use the same fibrillar structure to carry out a variety of biological functions, such as structure and protection supporting interface transitions and cell-cell recognition, protein control and storage, epigenetic inheritance, and memory. Recent discoveries of self-assembling amyloidogenic peptides and proteins, based on the amyloid core structure, give rise to interesting biomaterials with potential uses in numerous industries. These functions dramatically diverge from the initial conception of amyloid fibrils as intrinsically diseased entities. Apart from the natural ability of amyloids to spontaneously arrange themselves and their exceptional material characteristics, this aspect has prompted extensive research into engineering artificial amyloids for generating various nanostructures, molecular substances, and combined materials. Here, we discuss significant developments in the artificial design of useful amyloids as well as how amyloid materials serve as examples of how function emerges from protein self-assembly at various length scales.
Collapse
Affiliation(s)
- Srijita Chowdhury
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Nandini Sarkar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| |
Collapse
|
3
|
Polis B, Samson AO. Addressing the Discrepancies Between Animal Models and Human Alzheimer's Disease Pathology: Implications for Translational Research. J Alzheimers Dis 2024; 98:1199-1218. [PMID: 38517793 DOI: 10.3233/jad-240058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
Animal models, particularly transgenic mice, are extensively used in Alzheimer's disease (AD) research to emulate key disease hallmarks, such as amyloid plaques and neurofibrillary tangles formation. Although these models have contributed to our understanding of AD pathogenesis and can be helpful in testing potential therapeutic interventions, their reliability is dubious. While preclinical studies have shown promise, clinical trials often yield disappointing results, highlighting a notable gap and disparity between animal models and human AD pathology. Existing models frequently overlook early-stage human pathologies and other key AD characteristics, thereby limiting their application in identifying optimal therapeutic interventions. Enhancing model reliability necessitates rigorous study design, comprehensive behavioral evaluations, and biomarker utilization. Overall, a nuanced understanding of each model's neuropathology, its fidelity to human AD, and its limitations is essential for accurate interpretation and successful translation of findings. This article analyzes the discrepancies between animal models and human AD pathology that complicate the translation of findings from preclinical studies to clinical applications. We also delve into AD pathogenesis and attributes to propose a new perspective on this pathology and deliberate over the primary limitations of key experimental models. Additionally, we discuss several fundamental problems that may explain the translational failures and suggest some possible directions for more effective preclinical studies.
Collapse
Affiliation(s)
- Baruh Polis
- Bar-Ilan University Azrieli Faculty of Medicine, Safed, Israel
| | | |
Collapse
|
4
|
Kozin SA, Kechko OI, Adzhubei AA, Makarov AA, Mitkevich VA. Switching On/Off Amyloid Plaque Formation in Transgenic Animal Models of Alzheimer's Disease. Int J Mol Sci 2023; 25:72. [PMID: 38203242 PMCID: PMC10778642 DOI: 10.3390/ijms25010072] [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: 11/24/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
A hallmark of Alzheimer's disease (AD) are the proteinaceous aggregates formed by the amyloid-beta peptide (Aβ) that is deposited inside the brain as amyloid plaques. The accumulation of aggregated Aβ may initiate or enhance pathologic processes in AD. According to the amyloid hypothesis, any agent that has the capability to inhibit Aβ aggregation and/or destroy amyloid plaques represents a potential disease-modifying drug. In 2023, a humanized IgG1 monoclonal antibody (lecanemab) against the Aβ-soluble protofibrils was approved by the US FDA for AD therapy, thus providing compelling support to the amyloid hypothesis. To acquire a deeper insight on the in vivo Aβ aggregation, various animal models, including aged herbivores and carnivores, non-human primates, transgenic rodents, fish and worms were widely exploited. This review is based on the recent data obtained using transgenic animal AD models and presents experimental verification of the critical role in Aβ aggregation seeding of the interactions between zinc ions, Aβ with the isomerized Asp7 (isoD7-Aβ) and the α4β2 nicotinic acetylcholine receptor.
Collapse
Affiliation(s)
- Sergey A. Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (O.I.K.); (A.A.A.); (A.A.M.)
| | | | | | | | - Vladimir A. Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (O.I.K.); (A.A.A.); (A.A.M.)
| |
Collapse
|
5
|
Lewkowicz E, Nakamura MN, Rynkiewicz MJ, Gursky O. Molecular modeling of apoE in complexes with Alzheimer's amyloid-β fibrils from human brain suggests a structural basis for apolipoprotein co-deposition with amyloids. Cell Mol Life Sci 2023; 80:376. [PMID: 38010414 PMCID: PMC11061799 DOI: 10.1007/s00018-023-05026-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/06/2023] [Accepted: 10/30/2023] [Indexed: 11/29/2023]
Abstract
Apolipoproteins co-deposit with amyloids, yet apolipoprotein-amyloid interactions are enigmatic. To understand how apoE interacts with Alzheimer's amyloid-β (Aβ) peptide in fibrillary deposits, the NMR structure of full-length human apoE was docked to four structures of patient-derived Aβ1-40 and Aβ1-42 fibrils determined previously using cryo-electron microscopy or solid-state NMR. Similar docking was done using the NMR structure of human apoC-III. In all complexes, conformational changes in apolipoproteins were required to expose large hydrophobic faces of their amphipathic α-helices for sub-stoichiometric binding to hydrophobic surfaces on sides or ends of fibrils. Basic residues flanking the hydrophobic helical faces in apolipoproteins interacted favorably with acidic residue ladders in some amyloid polymorphs. Molecular dynamics simulations of selected apoE-fibril complexes confirmed their stability. Amyloid binding via cryptic sites, which became available upon opening of flexibly linked apolipoprotein α-helices, resembled apolipoprotein-lipid binding. This mechanism probably extends to other apolipoprotein-amyloid interactions. Apolipoprotein binding alongside fibrils could interfere with fibril fragmentation and secondary nucleation, while binding at the fibril ends could halt amyloid elongation and dissolution in a polymorph-specific manner. The proposed mechanism is supported by extensive prior experimental evidence and helps reconcile disparate reports on apoE's role in Aβ aggregation. Furthermore, apoE domain opening and direct interaction of Arg/Cys158 with amyloid potentially contributes to isoform-specific effects in Alzheimer's disease. In summary, current modeling supported by prior experimental studies suggests similar mechanisms for apolipoprotein-amyloid and apolipoprotein-lipid interactions; explains why apolipoproteins co-deposit with amyloids; and helps reconcile conflicting reports on the chaperone-like apoE action in Aβ aggregation.
Collapse
Affiliation(s)
- Emily Lewkowicz
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, USA
| | - Mari N Nakamura
- Undergraduate program, Department of Chemistry and Biochemistry, Middlebury College, 14 Old Chapel Rd, Middlebury, VT, 05753, USA
| | - Michael J Rynkiewicz
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, USA
| | - Olga Gursky
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, USA.
| |
Collapse
|
6
|
Lewkowicz E, Nakamura MN, Rynkiewicz MJ, Gursky O. Molecular modeling of apoE in complexes with Alzheimer's amyloid-β fibrils from human brain suggests a structural basis for apolipoprotein co-deposition with amyloids. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.04.551703. [PMID: 37577501 PMCID: PMC10418262 DOI: 10.1101/2023.08.04.551703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Apolipoproteins co-deposit with amyloids, yet apolipoprotein-amyloid interactions are enigmatic. To understand how apoE interacts with Alzheimer's amyloid-β (Aβ) peptide in fibrillary deposits, the NMR structure of full-length human apoE was docked to four structures of patient-derived Aβ1-40 and Aβ1-42 fibrils determined previously using cryo-electron microscopy or solid-state NMR. Similar docking was done using the NMR structure of human apoC-III. In all complexes, conformational changes in apolipoproteins were required to expose large hydrophobic faces of their amphipathic α-helices for sub-stoichiometric binding to hydrophobic surfaces on sides or ends of fibrils. Basic residues flanking the hydrophobic helical faces in apolipoproteins interacted favorably with acidic residue ladders in some amyloid polymorphs. Molecular dynamics simulations of selected apoE-fibril complexes confirmed their stability. Amyloid binding via cryptic sites, which became available upon opening of flexibly linked apolipoprotein α-helices, resembled apolipoprotein-lipid binding. This mechanism probably extends to other apolipoprotein-amyloid interactions. Apolipoprotein binding alongside fibrils could interfere with fibril fragmentation and secondary nucleation, while binding at the fibril ends could halt amyloid elongation and dissolution in a polymorph-specific manner. The proposed mechanism is supported by extensive prior experimental evidence and helps reconcile disparate reports on apoE's role in Aβ aggregation. Furthermore, apoE domain opening and direct interaction of Arg/Cys158 with amyloid potentially contributes to isoform-specific effects in Alzheimer's disease. In summary, current modeling supported by prior experimental studies suggests similar mechanisms for apolipoprotein-amyloid and apolipoprotein-lipid interactions; explains why apolipoproteins co-deposit with amyloids; and helps reconcile conflicting reports on the chaperone-like apoE action in Aβ aggregation.
Collapse
Affiliation(s)
- Emily Lewkowicz
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, United States
| | - Mari N. Nakamura
- Undergraduate program, Department of Chemistry, Middlebury College, 14 Old Chapel Rd, Middlebury, VT 05753VT United States
| | - Michael J. Rynkiewicz
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, United States
| | - Olga Gursky
- Department of Pharmacology, Physiology & Biophysics, Boston University Chobanian and Avedisian School of Medicine, W302, 700 Albany Street, Boston, MA, 02118, United States
| |
Collapse
|
7
|
Ha JH, Xu Y, Sekhon H, Wilkens S, Ren D, Loh SN. Mimicking Kidney Flow Shear Efficiently Induces Aggregation of LECT2, a Protein Involved in Renal Amyloidosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.13.548788. [PMID: 37503176 PMCID: PMC10369975 DOI: 10.1101/2023.07.13.548788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Aggregation of leukocyte cell-derived chemotaxin 2 (LECT2) causes ALECT2, a systemic amyloidosis that affects the kidney and liver. Homozygosity of the I40V LECT2 mutation is believed to be necessary but not sufficient for the disease. Previous studies established that LECT2 fibrillogenesis is greatly accelerated by loss of its single bound zinc ion and stirring or shaking. These forms of agitation are often used to facilitate protein aggregation, but they create heterogeneous shear conditions, including air-liquid interfaces that denature proteins, that are not present in the body. Here, we determined the extent to which a more physiological form of mechanical stress-shear generated by fluid flow through a network of artery and capillary-sized channels-drives LECT2 fibrillogenesis. To mimic blood flow through the human kidney, where LECT2 and other proteins form amyloid deposits, we developed a microfluidic device consisting of progressively branched channels narrowing from 5 mm to 20 μm in width. Flow shear was particularly pronounced at the branch points and in the smallest capillaries, and this induced LECT2 aggregation much more efficiently than conventional shaking methods. EM images suggested the resulting fibril structures were different in the two conditions. Importantly, results from the microfluidic device showed the first evidence that the I40V mutation accelerated fibril formation and increased both size and density of the aggregates. These findings suggest that kidney-like flow shear, in combination with zinc loss, acts in combination with the I40V mutation to trigger LECT2 amyloidogenesis. These microfluidic devices may be of general use for uncovering the mechanisms by which blood flow induces misfolding and amyloidosis of circulating proteins.
Collapse
Affiliation(s)
- Jeung-Hoi Ha
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Yikang Xu
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244
| | - Harsimranjit Sekhon
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Stephan Wilkens
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Dacheng Ren
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244
- Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY 13244
- Department of Biology, Syracuse University, Syracuse, NY 13244
| | - Stewart N. Loh
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| |
Collapse
|
8
|
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.
Collapse
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.
| |
Collapse
|
9
|
Hu J, Chen Q, Zhu H, Hou L, Liu W, Yang Q, Shen H, Chai G, Zhang B, Chen S, Cai Z, Wu C, Hong F, Li H, Chen S, Xiao N, Wang ZX, Zhang X, Wang B, Zhang L, Mo W. Microglial Piezo1 senses Aβ fibril stiffness to restrict Alzheimer's disease. Neuron 2023; 111:15-29.e8. [PMID: 36368316 DOI: 10.1016/j.neuron.2022.10.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 08/15/2022] [Accepted: 10/12/2022] [Indexed: 11/12/2022]
Abstract
The pathology of Alzheimer's disease (AD) is featured with extracellular amyloid-β (Aβ) plaques, whose impact on the mechanical properties of the surrounding brain tissues is unclear. Microglia sense and integrate biochemical cues of the microenvironment. However, whether the microglial mechanosensing pathways influence AD pathogenesis is unknown. Here, we surveyed the elevated stiffness of Aβ-plaque-associated tissues and observed the selective upregulation of the mechanosensitive ion channel Piezo1 in Aβ-plaque-associated microglia. Piezo1 sensed the stiffness stimuli of Aβ fibrils and subsequently induced Ca2+ influx for microglial clustering, phagocytosis, and compacting of Aβ plaques. Microglia lacking Piezo1 led to the exacerbation of Aβ pathology and cognitive decline, whereas pharmacological activation of microglial Piezo1 ameliorated brain Aβ burden and cognitive impairment in 5 × FAD mice. Together, our results reveal that Piezo1, a mechanosensor of Aβ fibril stiffness in microglia, represents a potential therapeutic target for AD.
Collapse
Affiliation(s)
- Jin Hu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China.
| | - Qiang Chen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Hongrui Zhu
- Department of Anesthesiology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China; Department of Anesthesiology, First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Lichao Hou
- Department of Anesthesiology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Wei Liu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Qihua Yang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Huidan Shen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China; Department of Anesthesiology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Guolin Chai
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Boxin Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Shaoxuan Chen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Zhiyu Cai
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Chongxin Wu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Fan Hong
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Hongda Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Sifang Chen
- Department of Neurosurgery, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Naian Xiao
- Department of Neurosurgery, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Zhan-Xiang Wang
- Department of Neurosurgery, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Xueqin Zhang
- Department of Obstetrics, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Bo Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Liang Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China.
| | - Wei Mo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Department of Neuroscience, the First Affiliated Hospital, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China.
| |
Collapse
|
10
|
Kozin SA. Role of Interaction between Zinc and Amyloid Beta in Pathogenesis of Alzheimer’s Disease. BIOCHEMISTRY (MOSCOW) 2023; 88:S75-S87. [PMID: 37069115 DOI: 10.1134/s0006297923140055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Progression of Alzheimer's disease is accompanied by the appearance of extracellular deposits in the brain tissues of patients with characteristic supramolecular morphology (amyloid plaques) the main components of which are β-amyloid isoforms (Aβ) and biometal ions (zinc, copper, iron). For nearly 40 years and up to the present time, the vast majority of experimental data indicate critical role of formation and accumulation of amyloid plaques (cerebral amyloidogenesis) in pathogenesis of Alzheimer's disease, however, nature of the molecular agents that initiate cerebral amyloidogenesis, as well as causes of aggregation of the native Aβ molecules in vivo remained unknown for a long time. This review discusses the current level of fundamental knowledge about the molecular mechanisms of interactions of zinc ions with a number of Aβ isoforms present in amyloid plaques of the patients with Alzheimer's disease, and also shows how this knowledge made it possible to identify driving forces of the cerebral amyloidogenesis in Alzheimer's disease and made it possible to determine fundamentally new biomarkers and drug targets as part of development of innovative strategy for diagnosis and treatment of Alzheimer's disease.
Collapse
Affiliation(s)
- Sergey A Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia.
| |
Collapse
|
11
|
Suprun EV, Radko SP, Kozin SA, Mitkevich VA, Makarov AA. Electrochemical Analysis in Studying β-Amyloid Aggregation. BIOCHEMISTRY (MOSCOW) 2023; 88:S88-S104. [PMID: 37069116 DOI: 10.1134/s0006297923140067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
β-amyloid (Aβ) is comprised of a group of peptides formed as a result of cleavage of the amyloid precursor protein by secretases. Aβ aggregation is considered as a central event in pathogenesis of Alzheimer's disease, the most common human neurodegenerative disorder. Molecular mechanisms of Aβ aggregation have intensively being investigated using synthetic Aβ peptides by methods based on monitoring of aggregates, including determination of their size and structure. In this review, an orthogonal approach to the study of Aβ aggregation is considered, which relies on electrochemical registration of the loss of peptide monomers. Electrochemical analysis of Aβ (by voltammetry and amperometric flow injection analysis) is based on registration of the oxidation signal of electroactive amino acid residues of the peptide on an electrode surface. The Aβ oxidation signal disappears, when the peptide is included in the aggregate. The advantages and disadvantages of electrochemical analysis for the study of spontaneous and metal-induced aggregation of Aβ, comparative analysis of various peptide isoforms, and study of the process of complexation of metal ions with the metal-binding domain of Aβ are discussed. It is concluded that the combined use of the electrochemical method and the methods based on detection of Aβ aggregates makes it possible to obtain more complete information about the mechanisms of peptide aggregation.
Collapse
Affiliation(s)
- Elena V Suprun
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
- Orekhovich Institute of Biomedical Chemistry, Moscow, 119121, Russia
| | - Sergey P Radko
- Orekhovich Institute of Biomedical Chemistry, Moscow, 119121, Russia
| | - Sergey A Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Vladimir A Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Alexander A Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| |
Collapse
|
12
|
Sequence-Activity Relationship of ATCUN Peptides in the Context of Alzheimer's Disease. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227903. [PMID: 36432004 PMCID: PMC9698028 DOI: 10.3390/molecules27227903] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 11/17/2022]
Abstract
Amino-terminal CuII and NiII (ATCUN) binding sequences are widespread in the biological world. Here, we report on the study of eight ATCUN peptides aimed at targeting copper ions and stopping the associated formation of reactive oxygen species (ROS). This study was actually more focused on Cu(Aβ)-induced ROS production in which the Aβ peptide is the "villain" linked to Alzheimer's disease. The full characterization of CuII binding to the ATCUN peptides, the CuII extraction from CuII(Aβ), and the ability of the peptides to prevent and/or stop ROS formation are described in the relevant biological conditions. We highlighted in this research that all the ATCUN motifs studied formed the same thermodynamic complex but that the addition of a second histidine in position 1 or 2 allowed for an improvement in the CuII uptake kinetics. This kinetic rate was directly related to the ability of the peptide to stop the CuII(Aβ)-induced production of ROS, with the most efficient motifs being HWHG and HGHW.
Collapse
|
13
|
Khurshid B, Rehman AU, Luo R, Khan A, Wadood A, Anwar J. Heparin-Assisted Amyloidogenesis Uncovered through Molecular Dynamics Simulations. ACS OMEGA 2022; 7:15132-15144. [PMID: 35572757 PMCID: PMC9089684 DOI: 10.1021/acsomega.2c01034] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 04/11/2022] [Indexed: 05/14/2023]
Abstract
Glycosaminoglycans (GAGs), in particular, heparan sulfate and heparin, are found colocalized with Aβ amyloid. They have been shown to enhance fibril formation, suggesting a possible pathological connection. We have investigated heparin's assembly of the KLVFFA peptide fragment using molecular dynamics simulation, to gain a molecular-level mechanistic understanding of how GAGs enhance fibril formation. The simulations reveal an exquisite process wherein heparin accelerates peptide assembly by first "gathering" the peptide molecules and then assembling them. Heparin does not act as a mere template but is tightly coupled to the peptides, yielding a composite protofilament structure. The strong intermolecular interactions suggest composite formation to be a general feature of heparin's interaction with peptides. Heparin's chain flexibility is found to be essential to its fibril promotion activity, and the need for optimal heparin chain length and concentration has been rationalized. These insights yield design rules (flexibility; chain-length) and protocol guidance (heparin:peptide molar ratio) for developing effective heparin mimetics and other functional GAGs.
Collapse
Affiliation(s)
- Beenish Khurshid
- Department
of Biochemistry, Abdul Wali Khan University
Mardan, Mardan 23200, Pakistan
| | - Ashfaq Ur Rehman
- Department
of Molecular Biology and Biochemistry, University
of California, Irvine, California 92697, United States
| | - Ray Luo
- Department
of Molecular Biology and Biochemistry, University
of California, Irvine, California 92697, United States
| | - Alamzeb Khan
- Department
of Pediatrics, Yale School of Medicine, Yale University, New Haven, Connecticut 06511, United States
| | - Abdul Wadood
- Department
of Biochemistry, Abdul Wali Khan University
Mardan, Mardan 23200, Pakistan
| | - Jamshed Anwar
- Department
of Chemistry, University of Lancaster, Lancaster LA1 4YB, United Kingdom
| |
Collapse
|
14
|
Advancements in the development of multi-target directed ligands for the treatment of Alzheimer's disease. Bioorg Med Chem 2022; 61:116742. [PMID: 35398739 DOI: 10.1016/j.bmc.2022.116742] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 04/01/2022] [Indexed: 12/20/2022]
Abstract
Alzheimer's disease (AD) is a multifactorial irreversible neurological disorder which results in cognitive impairment, loss of cholinergic neurons in synapses of the basal forebrain and neuronal death. Exact pathology of the disease is not yet known however, many hypotheses have been proposed for its treatment. The available treatments including monotherapies and combination therapies are not able to combat the disease effectively because of its complex pathological mechanism. A multipotent drug for AD has the potential to bind or inhibit multiple targets responsible for the progression of the disease like aggregated Aβ, hyperphosphorylated tau proteins, cholinergic and adrenergic receptors, MAO enzymes, overactivated N-methyl-d-aspartate (NMDA), α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor etc. The traditional approach of one disease-one target-one drug has been rationalized to one drug-multi targets for the chronic diseases like AD and cancer. Thus, over the last decade research focus has been shifted towards the development of multi target directed ligands (MTDLs) which can simultaneously inhibit multiple targets and stop or slow the progression of the disease. The MTDLs can be more effective against AD and eliminate any possibility of drug-drug interactions. Many important active pharmacophore units have been fused, merged or incorporated into different scaffolds to synthesize new potent drugs. In the current article, we have described various hypothesis for AD and effectiveness of the MTDLs treatment strategy is discussed in detail. Different chemical scaffolds and their synthetic strategies have been described and important functionalities are identified in the chemical scaffold that have the potential to bind to the multiple targets. The important leads identified in this study with MTDL characteristics have the potential to be developed as drug candidates for the effective treatment of AD.
Collapse
|
15
|
Mukhopadhyay S, Bera SC, Ramola K. Observation of two-step aggregation kinetics of Amyloid- βproteins from fractal analysis. Phys Biol 2022; 19. [PMID: 35381581 DOI: 10.1088/1478-3975/ac6478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/05/2022] [Indexed: 11/12/2022]
Abstract
Self-aggregation in proteins has long been studied and modeled due to its ubiquity and importance in many biological contexts. Several models propose a two step aggregation mechanism, consisting of linear growth of fibrils and secondary growth involving branch formation. Single molecule imaging techniques such as total internal reflection fluorescence (TIRF) microscopy can provide direct evidence of such mechanisms, however, analyzing such large data-sets is challenging. In this paper, we analyze for the first time, images of growing amyloid fibrils obtained from TIRF microscopy using the techniques of fractal geometry, which provides a natural framework to disentangle the two types of growth mechanisms at play. We find that after an initial linear growth phase, identified by a plateau in the average fractal dimension with time, the occurrence of branching events leads to a further increase in the fractal dimension, with a final saturation value ≈ 2. This provides direct evidence of the two-step nature of the aggregation kinetics of Amyloid-βproteins, with an initial linear elongation phase followed by branching at later times.
Collapse
Affiliation(s)
- Soham Mukhopadhyay
- Tata Institute of Fundamental Research Centre for Interdisciplinary Sciences, 36/P, Gopanpally Tanda, Serilingampally Mandal, Hyderabad, Telangana, 500046, INDIA
| | - Subhas C Bera
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 3, Erlangen, Bayern, 91058, GERMANY
| | - Kabir Ramola
- Tata Institute of Fundamental Research Centre for Interdisciplinary Sciences, 36/P, Gopanpally Tanda, Serilingampally Mandal, Hyderabad, Telangana, 500046, INDIA
| |
Collapse
|
16
|
Ferdosh S, Banerjee S, Singh J, Barat C. Amyloid protein-induced sequestration of the eukaryotic ribosome: effect of stoichiometry and polyphenolic inhibitors. FEBS Lett 2022; 596:1190-1202. [PMID: 35114013 DOI: 10.1002/1873-3468.14308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/12/2022] [Accepted: 01/22/2022] [Indexed: 11/07/2022]
Abstract
Alzheimer's disease (AD) is characterized by the appearance of neurofibrillary tangles comprising of the Tau protein and aggregation of amyloid-β peptides (Aβ 1-40 and Aβ 1-42). A concomitant loss of the ribosomal population is also observed in AD-affected neurons. Our studies demonstrate that, similarly to Tau protein aggregation, in vitro aggregation of Aβ peptides in the vicinity of the yeast 80S ribosome can induce co-aggregation of ribosomal components. The RNA-stimulated aggregation of Aβ peptides and the Tau-K18 variant is dependent on the RNA:protein stoichiometric ratio. A similar effect of stoichiometry is also observed on the ribosome-protein co-aggregation process. Polyphenolic inhibitors of amyloid aggregation, such as rosmarinic acid and myricetin, inhibit RNA-stimulated Aβ and Tau-K18 aggregation and can mitigate the co-aggregation of ribosomal components.
Collapse
Affiliation(s)
- Sehnaz Ferdosh
- Department of Biotechnology, St. Xavier's College, Kolkata, India
| | - Senjuti Banerjee
- Department of Biotechnology, St. Xavier's College, Kolkata, India
| | - Jayshree Singh
- Department of Biotechnology, St. Xavier's College, Kolkata, India
| | - Chandana Barat
- Department of Biotechnology, St. Xavier's College, Kolkata, India
| |
Collapse
|
17
|
Alvarez AB, Rodríguez PEA, Fidelio GD. Gangliosides smelt nanostructured amyloid Aβ(1-40) fibrils in a membrane lipid environment. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183749. [PMID: 34506795 DOI: 10.1016/j.bbamem.2021.183749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 08/03/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Gangliosides induced a smelting process in nanostructured amyloid fibril-like films throughout the surface properties contributed by glycosphingolipids when mixed with 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC)/Aβ(1-40) amyloid peptide. We observed a dynamical smelting process when pre-formed amyloid/phospholipid mixture is laterally mixed with gangliosides. This particular environment, gangliosides/phospholipid/Aβ(1-40) peptide mixed interfaces, showed complex miscibility behavior depending on gangliosides content. At 0% of ganglioside covered surface respect to POPC, Aβ(1-40) peptide forms fibril-like structure. In between 5 and 15% of gangliosides, the fibrils dissolve into irregular domains and they disappear when the proportion of gangliosides reach the 20%. The amyloid interfacial dissolving effect of gangliosides is taken place at lateral pressure equivalent to the organization of biological membranes. Domains formed at the interface are clearly evidenced by Brewster Angle Microscopy and Atomic Force Microscopy when the films are transferred onto a mica support. The domains are thioflavin T (ThT) positive when observed by fluorescence microscopy. We postulated that the smelting process of amyloids fibrils-like structure at the membrane surface provoked by gangliosides is a direct result of a new interfacial environment imposed by the complex glycosphingolipids. We add experimental evidence, for the first time, how a change in the lipid environment (increase in ganglioside proportion) induces a rapid loss of the asymmetric structure of amyloid fibrils by a simple modification of the membrane condition (a more physiological situation).
Collapse
Affiliation(s)
- Alain Bolaño Alvarez
- Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina; Centro de Investigaciones en Química Biológica de Córdoba, CIQUIBIC, CONICET, Universidad Nacional de Córdoba, Argentina
| | | | - Gerardo D Fidelio
- Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina; Centro de Investigaciones en Química Biológica de Córdoba, CIQUIBIC, CONICET, Universidad Nacional de Córdoba, Argentina.
| |
Collapse
|
18
|
Lewkowicz E, Gursky O. Dynamic protein structures in normal function and pathologic misfolding in systemic amyloidosis. Biophys Chem 2022; 280:106699. [PMID: 34773861 PMCID: PMC9416430 DOI: 10.1016/j.bpc.2021.106699] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/08/2021] [Accepted: 10/08/2021] [Indexed: 02/08/2023]
Abstract
Dynamic and disordered regions in native proteins are often critical for their function, particularly in ligand binding and signaling. In certain proteins, however, such regions can contribute to misfolding and pathologic deposition as amyloid fibrils in vivo. For example, dynamic and disordered regions can promote amyloid formation by destabilizing the native structure, by directly triggering the aggregation, by promoting protein condensation, or by acting as sites of early proteolytic cleavage that favor a release of aggregation-prone fragments or facilitate fibril maturation. At the same time, enhanced dynamics in the native protein state accelerates proteolytic degradation that counteracts amyloid accumulation in vivo. Therefore, the functional need for dynamic protein regions must be balanced against their inherently labile nature. How exactly this balance is achieved and how is it shifted upon amyloidogenic mutations or post-translational modifications? To illustrate possible scenarios, here we review the beneficial and pathologic roles of dynamic and disordered regions in the native states of three families of human plasma proteins that form amyloid precursors in systemic amyloidoses: immunoglobulin light chain, apolipoproteins, and serum amyloid A. Analysis of structure, stability and local dynamics of these diverse proteins and their amyloidogenic variants exemplifies how disordered/dynamic regions can provide a functional advantage as well as an Achilles heel in pathologic amyloid formation.
Collapse
|
19
|
Busi F, Turbant F, Waeytens J, El Hamoui O, Wien F, Arluison V. Evaluation of Amyloid Inhibitor Efficiency to Block Bacterial Survival. Methods Mol Biol 2022; 2538:145-163. [PMID: 35951299 DOI: 10.1007/978-1-0716-2529-3_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Amyloid inhibitors, such as the green tea compound epigallocatechin gallate EGCG, apomorphine or curlicide, have antibacterial properties. Conversely, antibiotics such as tetracycline derivatives or rifampicin also affect eukaryotic amyloids formation and may be used to treat neurodegenerative diseases. This opens the possibility for existing drugs to be repurposed in view of new therapy, targeting amyloid-like proteins from eukaryotes to prokaryotes and conversely. Here we present how to evaluate the effect of these amyloid-forming inhibitors on bacterial amyloid self-assemblies in vitro and on bacterial survival. The different approaches possible are presented.
Collapse
Affiliation(s)
- Florent Busi
- Université Paris Cité, BFA, UMR 8251, CNRS, Paris, France.
- Université Paris Cité, Paris, France.
| | - Florian Turbant
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR 12, Université Paris Saclay, CEA Saclay, Gif-sur-Yvette, France
| | - Jehan Waeytens
- Structure et Fonction des Membranes Biologiques, Université libre de Bruxelles, Bruxelles, Belgium
- Institut de Chimie Physique, CNRS UMR8000, Université Paris-Sud, Université Paris-Saclay, Orsay, France
| | - Omar El Hamoui
- DISCO Beamline, Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, Gif-sur-Yvette, France
| | - Frank Wien
- DISCO Beamline, Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, Gif-sur-Yvette, France
| | - Véronique Arluison
- Université Paris Cité, Paris, France
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR 12, Université Paris Saclay, CEA Saclay, Gif-sur-Yvette, France
| |
Collapse
|
20
|
LaRocca TJ, Cavalier AN, Roberts CM, Lemieux MR, Ramesh P, Garcia MA, Link CD. Amyloid beta acts synergistically as a pro-inflammatory cytokine. Neurobiol Dis 2021; 159:105493. [PMID: 34464705 PMCID: PMC8502211 DOI: 10.1016/j.nbd.2021.105493] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/08/2021] [Accepted: 08/26/2021] [Indexed: 12/12/2022] Open
Abstract
The amyloid beta (Aβ) peptide is believed to play a central role in Alzheimer's disease (AD), the most common age-related neurodegenerative disorder. However, the natural, evolutionarily selected functions of Aβ are incompletely understood. Here, we report that nanomolar concentrations of Aβ act synergistically with known cytokines to promote pro-inflammatory activation in primary human astrocytes (a cell type increasingly implicated in brain aging and AD). Using transcriptomics (RNA-seq), we show that Aβ can directly substitute for the complement component C1q in a cytokine cocktail previously shown to induce astrocyte immune activation. Furthermore, we show that astrocytes synergistically activated by Aβ have a transcriptional signature similar to neurotoxic "A1" astrocytes known to accumulate with age and in AD. Interestingly, we find that this biological action of Aβ at low concentrations is distinct from the transcriptome changes induced by the high/supraphysiological doses of Aβ often used in in vitro studies. Collectively, our results suggest an important, cytokine-like function for Aβ and a novel mechanism by which it may directly contribute to the neuroinflammation associated with brain aging and AD.
Collapse
Affiliation(s)
- Thomas J LaRocca
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America; Department of Health and Exercise Science, Center for Healthy Aging, Colorado State University (Current), Fort Collins, CO, United States of America.
| | - Alyssa N Cavalier
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America; Department of Health and Exercise Science, Center for Healthy Aging, Colorado State University (Current), Fort Collins, CO, United States of America
| | - Christine M Roberts
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Maddie R Lemieux
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Pooja Ramesh
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Micklaus A Garcia
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Christopher D Link
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America.
| |
Collapse
|
21
|
Wang P, Zhao J, Hossaini Nasr S, Otieno SA, Zhang F, Qiang W, Linhardt RJ, Huang X. Probing Amyloid β Interactions with Synthetic Heparan Sulfate Oligosaccharides. ACS Chem Biol 2021; 16:1894-1899. [PMID: 33592143 DOI: 10.1021/acschembio.0c00904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Heparan sulfate (HS) can play important roles in the biology and pathology of amyloid β (Aβ), a hallmark of Alzheimer's disease. To better understand the structure-activity relationship of HS/Aβ interactions, synthetic HS oligosaccharides ranging from tetrasaccharides to decasaccharides have been utilized to study Aβ interactions. Surface plasmon resonance experiments showed that the highly sulfated HS tetrasaccharides bearing full 2-O, 6-O, and N-sulfations exhibited the strongest binding with Aβ among the tetrasaccharides investigated. Elongating the glycan length to hexa- and deca-saccharides significantly enhanced Aβ affinity compared to the corresponding HS tetrasaccharide. Solid state NMR studies of the complexes of Aβ with HS hexa- and deca-saccharides showed most significant chemical shift perturbation in the C-terminus residues of Aβ. The strong binding HS oligosaccharides could reduce the cellular toxicities induced by Aβ. This study provides new insights into HS/Aβ interactions, highlighting how synthetic structurally well-defined HS oligosaccharides can assist in biological understanding of Aβ.
Collapse
Affiliation(s)
| | - Jing Zhao
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | | | - Sarah A. Otieno
- Department of Chemistry, Binghamton University, State University of New York, Binghamton, New York 13902, United States
| | - Fuming Zhang
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Wei Qiang
- Department of Chemistry, Binghamton University, State University of New York, Binghamton, New York 13902, United States
| | - Robert J. Linhardt
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | | |
Collapse
|
22
|
Mitochondrial Disruption by Amyloid Beta 42 Identified by Proteomics and Pathway Mapping. Cells 2021; 10:cells10092380. [PMID: 34572029 PMCID: PMC8468661 DOI: 10.3390/cells10092380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/23/2021] [Accepted: 08/31/2021] [Indexed: 11/17/2022] Open
Abstract
Alzheimer’s disease (AD) is marked by chronic neurodegeneration associated with the occurrence of plaques containing amyloid β (Aβ) proteins in various parts of the human brain. An increase in several Aβ fragments is well documented in patients with AD and anti-amyloid targeting is an emerging area of therapy. Soluble Aβ can bind to various cell surface and intracellular molecules with the pathogenic Aβ42 fragment leading to neurotoxicity. Here we examined the effect of Aβ42 on network adaptations in the proteome of nerve growth factor (NGF) differentiated PC12 cells using liquid-chromatography electrospray ionization mass spectrometry (LC-ESI MS/MS) proteomics. Whole-cell peptide mass fingerprinting was coupled to bioinformatic gene set enrichment analysis (GSEA) in order to identify differentially represented proteins and related gene ontology (GO) pathways within Aβ42 treated cells. Our results underscore a role for Aβ42 in disrupting proteome responses for signaling, bioenergetics, and morphology in mitochondria. These findings highlight the specific components of the mitochondrial response during Aβ42 neurotoxicity and suggest several new biomarkers for detection and surveillance of amyloid disease.
Collapse
|
23
|
Rahman MM, Lendel C. Extracellular protein components of amyloid plaques and their roles in Alzheimer's disease pathology. Mol Neurodegener 2021; 16:59. [PMID: 34454574 PMCID: PMC8400902 DOI: 10.1186/s13024-021-00465-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 06/11/2021] [Indexed: 12/20/2022] Open
Abstract
Alzheimer's disease (AD) is pathologically defined by the presence of fibrillar amyloid β (Aβ) peptide in extracellular senile plaques and tau filaments in intracellular neurofibrillary tangles. Extensive research has focused on understanding the assembly mechanisms and neurotoxic effects of Aβ during the last decades but still we only have a brief understanding of the disease associated biological processes. This review highlights the many other constituents that, beside Aβ, are accumulated in the plaques, with the focus on extracellular proteins. All living organisms rely on a delicate network of protein functionality. Deposition of significant amounts of certain proteins in insoluble inclusions will unquestionably lead to disturbances in the network, which may contribute to AD and copathology. This paper provide a comprehensive overview of extracellular proteins that have been shown to interact with Aβ and a discussion of their potential roles in AD pathology. Methods that can expand the knowledge about how the proteins are incorporated in plaques are described. Top-down methods to analyze post-mortem tissue and bottom-up approaches with the potential to provide molecular insights on the organization of plaque-like particles are compared. Finally, a network analysis of Aβ-interacting partners with enriched functional and structural key words is presented.
Collapse
Affiliation(s)
- M Mahafuzur Rahman
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
| |
Collapse
|
24
|
Lewkowicz E, Jayaraman S, Gursky O. Protein Amyloid Cofactors: Charged Side-Chain Arrays Meet Their Match? Trends Biochem Sci 2021; 46:626-629. [PMID: 34210544 DOI: 10.1016/j.tibs.2021.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/05/2021] [Accepted: 05/08/2021] [Indexed: 12/25/2022]
Abstract
Recent advances in high-resolution structural studies of protein amyloids have revealed parallel in-register cross-β-sheets with periodic arrays of closely spaced identical residues. What do these structures tell us about the mechanisms of action of common amyloid-promoting factors, such as heparan sulfate (HS), nucleic acids, polyphosphates, anionic phospholipids, and acidic pH?
Collapse
Affiliation(s)
- Emily Lewkowicz
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Shobini Jayaraman
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Olga Gursky
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA.
| |
Collapse
|
25
|
Lashuel HA. Rethinking protein aggregation and drug discovery in neurodegenerative diseases: Why we need to embrace complexity? Curr Opin Chem Biol 2021; 64:67-75. [PMID: 34174698 DOI: 10.1016/j.cbpa.2021.05.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/30/2021] [Accepted: 05/09/2021] [Indexed: 12/19/2022]
Abstract
More than a century has passed since pathological protein aggregates were first identified in the brains of patients with neurodegenerative diseases (NDDs). Yet, we still do not have effective therapies to treat or slow the progression of these devastating diseases or diagnostics for early detection and monitoring disease progression. Herein, I reflect on recent findings that are challenging traditional views about the composition, ultrastructural properties, and diversity of protein pathologies in the brain, their mechanisms of formation and how we investigate and model pathological aggregation processes in the laboratory today. This article is an invitation to embrace the complexity of proteinopathies as an essential step to understanding the molecular mechanisms underpinning NDDs and to advance translational research and drug discovery in NDDs.
Collapse
Affiliation(s)
- Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
| |
Collapse
|
26
|
Uddin MS, Al Mamun A, Rahman MA, Behl T, Perveen A, Hafeez A, Bin-Jumah MN, Abdel-Daim MM, Ashraf GM. Emerging Proof of Protein Misfolding and Interactions in Multifactorial Alzheimer's Disease. Curr Top Med Chem 2021; 20:2380-2390. [PMID: 32479244 DOI: 10.2174/1568026620666200601161703] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Alzheimer's disease (AD) is a devastating neurodegenerative disorder, characterized by the extracellular accumulations of amyloid beta (Aβ) as senile plaques and intracellular aggregations of tau in the form of neurofibrillary tangles (NFTs) in specific brain regions. In this review, we focus on the interaction of Aβ and tau with cytosolic proteins and several cell organelles as well as associated neurotoxicity in AD. SUMMARY Misfolded proteins present in cells accompanied by correctly folded, intermediately folded, as well as unfolded species. Misfolded proteins can be degraded or refolded properly with the aid of chaperone proteins, which are playing a pivotal role in protein folding, trafficking as well as intermediate stabilization in healthy cells. The continuous aggregation of misfolded proteins in the absence of their proper clearance could result in amyloid disease including AD. The neuropathological changes of AD brain include the atypical cellular accumulation of misfolded proteins as well as the loss of neurons and synapses in the cerebral cortex and certain subcortical regions. The mechanism of neurodegeneration in AD that leads to severe neuronal cell death and memory dysfunctions is not completely understood until now. CONCLUSION Examining the impact, as well as the consequences of protein misfolding, could help to uncover the molecular etiologies behind the complicated AD pathogenesis.
Collapse
Affiliation(s)
- Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh,Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Abdullah Al Mamun
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh,Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Md Ataur Rahman
- Center for Neuroscience, Brain Science Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Asma Perveen
- Glocal School of Life Sciences, Glocal University, Saharanpur, India
| | - Abdul Hafeez
- Glocal School of Pharmacy, Glocal University, Saharanpur, India
| | - May N Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11474, Saudi Arabia
| | - Mohamed M Abdel-Daim
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia,Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
27
|
Gao Y, Saccuzzo EG, Hill SE, Huard DJE, Robang AS, Lieberman RL, Paravastu AK. Structural Arrangement within a Peptide Fibril Derived from the Glaucoma-Associated Myocilin Olfactomedin Domain. J Phys Chem B 2021; 125:2886-2897. [PMID: 33683890 DOI: 10.1021/acs.jpcb.0c11460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Myocilin-associated glaucoma is a new addition to the list of diseases linked to protein misfolding and amyloid formation. Single point variants of the ∼257-residue myocilin olfactomedin domain (mOLF) lead to mutant myocilin aggregation. Here, we analyze the 12-residue peptide P1 (GAVVYSGSLYFQ), corresponding to residues 326-337 of mOLF, previously shown to form amyloid fibrils in vitro and in silico. We applied solid-state NMR structural measurements to test the hypothesis that P1 fibrils adopt one of three predicted structures. Our data are consistent with a U-shaped fibril arrangement for P1, one that is related to the U-shape predicted previously in silico. Our data are also consistent with an antiparallel fibril arrangement, likely driven by terminal electrostatics. Our proposed structural model is reminiscent of fibrils formed by the Aβ(1-40) Iowa mutant peptide, but with a different arrangement of molecular turn regions. Taken together, our results strengthen the connection between mOLF fibrils and the broader amylome and contribute to our understanding of the fundamental molecular interactions governing fibril architecture and stability.
Collapse
|
28
|
Xu XJ, Yang MS, Zhang B, Niu F, Dong JQ, Liu BY. Glucose metabolism: A link between traumatic brain injury and Alzheimer's disease. Chin J Traumatol 2021; 24:5-10. [PMID: 33358332 PMCID: PMC7878452 DOI: 10.1016/j.cjtee.2020.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 10/08/2020] [Accepted: 10/15/2020] [Indexed: 02/04/2023] Open
Abstract
Traumatic brain injury (TBI), a growing public health problem, is a leading cause of death and disability worldwide, although its prevention measures and clinical cares are substantially improved. Increasing evidence shows that TBI may increase the risk of mood disorders and neurodegenerative diseases, including Alzheimer's disease (AD). However, the complex relationship between TBI and AD remains elusive. Metabolic dysfunction has been the common pathology in both TBI and AD. On the one hand, TBI perturbs the glucose metabolism of the brain, and causes energy crisis and subsequent hyperglycolysis. On the other hand, glucose deprivation promotes amyloidogenesis via β-site APP cleaving enzyme-1 dependent mechanism, and triggers tau pathology and synaptic function. Recent findings suggest that TBI might facilitate Alzheimer's pathogenesis by altering metabolism, which provides clues to metabolic link between TBI and AD. In this review, we will explore how TBI-induced metabolic changes contribute to the development of AD.
Collapse
Affiliation(s)
- Xiao-Jian Xu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
| | - Meng-Shi Yang
- Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Bin Zhang
- Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Fei Niu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
| | - Jin-Qian Dong
- Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Bai-Yun Liu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China,Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China,Nerve Injury and Repair Center of Beijing Institute for Brain Disorders, Beijing, 100070, China,China National Clinical Research Center for Neurological Diseases, Beijing, 100070, China,Corresponding author. Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100070, China.
| |
Collapse
|
29
|
Faller P, Hureau C. Reproducibility Problems of Amyloid-β Self-Assembly and How to Deal With Them. Front Chem 2021; 8:611227. [PMID: 33520935 PMCID: PMC7841044 DOI: 10.3389/fchem.2020.611227] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/08/2020] [Indexed: 12/25/2022] Open
Abstract
The self-assembly of peptides and proteins into amyloid fibrils and other aggregates are linked to several diseases. One of the most studied cases is the peptide amyloid-β (Aβ), found self-assembled in Alzheimer's disease patients' brains. In test tubes, assays with chemically synthesized or recombinant Aβ are widely investigated to understand the aggregation process and to find modulators, which could be of therapeutic interest. Experience over more than a decade in our laboratory through discussions with colleagues, expertly studying the literature, and as reviewers revealed to us the widely encountered difficulty to control the aggregation and obtain reproducible results in the test tube. However, this issue is scarcely reported and discussed in the publications, which we think hampers strongly the progress in this field and can deceive newcomers. Here, we describe the difficulty and potential reasons to obtain reproducible aggregation data and propose some guidelines for working with it.
Collapse
Affiliation(s)
- Peter Faller
- Institut de Chimie, UMR 7177, CNRS-Université de Strasbourg, Strasbourg, France
| | | |
Collapse
|
30
|
Ershov PV, Mezentsev YV, Yablokov EO, Kaluzgskiy LA, Ivanov AS, Gnuchev NV, Mitkevich VA, Makarov AA, Kozin SA. Direct Molecular Fishing of Zinc-Dependent Protein Partners of Amyloid-beta 1–16 with the Taiwan (D7H) Mutation and Phosphorylated Ser8 Residue. Mol Biol 2021. [DOI: 10.1134/s0026893320060035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
31
|
Turbant F, Hamoui OE, Partouche D, Sandt C, Busi F, Wien F, Arluison V. Identification and characterization of the Hfq bacterial amyloid region DNA interactions. BBA ADVANCES 2021; 1:100029. [PMID: 37082015 PMCID: PMC10074921 DOI: 10.1016/j.bbadva.2021.100029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 11/18/2022] Open
Abstract
Nucleic acid amyloid proteins interactions have been observed in the past few years. These interactions often promote protein aggregation. Nevertheless, molecular basis and physiological consequences of these interactions are still poorly understood. Additionally, it is unknown whether the nucleic acid promotes the formation of self-assembly due to direct interactions or indirectly via sequences surrounding the amyloid region. Here we focus our attention on a bacterial amyloid, Hfq. This protein is a pleiotropic bacterial regulator that mediates many aspects of nucleic acids metabolism. The protein notably mediates mRNA stability and translation efficiency by using stress-related small non coding regulatory RNA. In addition, Hfq, thanks to its amyloid C-terminal region, binds and compacts DNA. A combination of experimental methodologies, including synchrotron radiation circular dichroism (SRCD), gel shift assay and infrared (FTIR) spectroscopy have been used to probe the interaction of Hfq C-terminal region with DNA. We clearly identify important amino acids in this region involved in DNA binding and polymerization properties. This allows to understand better how this bacterial amyloid interacts with DNA. Possible functional consequence to answer to stresses are discussed.
Collapse
Affiliation(s)
- Florian Turbant
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR12, Université Paris Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
- Department of Molecular Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Omar El Hamoui
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192, Gif-sur-Yvette, France
| | - David Partouche
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR12, Université Paris Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192, Gif-sur-Yvette, France
| | - Christophe Sandt
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192, Gif-sur-Yvette, France
| | - Florent Busi
- Université de Paris, UFR Sciences du vivant, 75006 Paris cedex, France
- Université de Paris, BFA, UMR 8251, CNRS, F-75013 Paris, France
| | - Frank Wien
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192, Gif-sur-Yvette, France
- Corresponding author.
| | - Véronique Arluison
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR12, Université Paris Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
- Université de Paris, UFR Sciences du vivant, 75006 Paris cedex, France
- Corresponding author.
| |
Collapse
|
32
|
Jennings LK, Prebble DW, Xu M, Ekins MG, Munn AL, Mellick GD, Carroll AR. Anti-prion and α-Synuclein Aggregation Inhibitory Sterols from the Sponge Lamellodysidea cf. chlorea. JOURNAL OF NATURAL PRODUCTS 2020; 83:3751-3757. [PMID: 33269586 DOI: 10.1021/acs.jnatprod.0c01168] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In a study aimed at identifying new anti-prion compounds we screened a library of 500 Australian marine invertebrate derived extracts using a yeast-based anti-prion assay. This resulted in an extract from the subtropical sponge Lamellodysidea cf. chlorea showing potent anti-prion activity. The bioassay-guided investigation of the sponge extract led to the isolation of three new bioactive polyoxygenated steroids, lamellosterols A-C (1-3). These sterols were all isolated in low yield, and their structures elucidated by extensive NMR and MS data analysis. Lamellosterols A-C displayed potent anti-prion activity against the [PSI+] yeast prion (EC50s of 12.7, 13.8, and 9.8 μM, respectively). Lamellosterol A (1) was further shown to bind to the Parkinson's disease implicated amyloid protein, α-synuclein, and to significantly inhibit its aggregation. Our findings indicate that these polyoxygenated sterol sulfates may be useful compounds to study mechanisms associated with neurodegenerative diseases.
Collapse
Affiliation(s)
- Laurence K Jennings
- Environmental Futures Research Institute, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- School of Environment and Science, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
| | - Dale W Prebble
- Environmental Futures Research Institute, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- School of Environment and Science, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
| | - Mingming Xu
- School of Environment and Science, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| | | | - Alan L Munn
- School of Medical Science and Molecular Basis of Disease Program, Menzies Health Institute Queensland, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
| | - George D Mellick
- School of Environment and Science, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- School of Environment and Science, Griffith University (Gold Coast campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| |
Collapse
|
33
|
Azulay DN, Ghrayeb M, Ktorza IB, Nir I, Nasser R, Harel YS, Chai L. Colloidal-like aggregation of a functional amyloid protein. Phys Chem Chem Phys 2020; 22:23286-23294. [PMID: 33033811 DOI: 10.1039/d0cp03265d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functional amyloid proteins are self-secreted by microbial cells that aggregate into extracellular networks and provide microbial colonies with mechanical stability and resistance to antibiotic treatment. In order to understand the formation mechanism of functional amyloid networks, their aggregation has been studied in vitro under different physical conditions, such as temperature, salt concentration, and pH. Typical aggregates' morphologies include fibers or plaques, the latter resembling amyloid aggregates in neurodegenerated brains. Here, we studied the pH-reduction-induced aggregation of TasA, an extracellular functional amyloid appearing as fibers in biofilms of the soil bacterium, Bacillus subtilis. We used turbidity and zeta potential measurements, electron microscopy, atomic force microscopy, and static light scattering measurements, to characterize the aggregates of TasA and to compare them with colloidal aggregates. We further studied the aggregation of TasA in the presence of negatively charged nanoparticles and showed that nanoparticles co-aggregated with TasA, and that the co-aggregation was hindered sterically. Based on these studies, we concluded that, similarly to colloidal aggregation, TasA aggregation occurs due to surface potential modulations and that the aggregation is followed by a rearrangement process. Shedding light on the aggregation mechanism of TasA, our results can be used for the design of TasA aggregation inhibitors and promoters.
Collapse
Affiliation(s)
- David N Azulay
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Mnar Ghrayeb
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Ilanit Bensimhon Ktorza
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Ido Nir
- The Israel Institute for Biological Research, Ness Ziona, Israel
| | - Rinad Nasser
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Yair S Harel
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Liraz Chai
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| |
Collapse
|
34
|
Yao W, Wang K, Wu A, Reed WF, Gibb BC. Anion binding to ubiquitin and its relevance to the Hofmeister effects. Chem Sci 2020; 12:320-330. [PMID: 34163600 PMCID: PMC8178748 DOI: 10.1039/d0sc04245e] [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] [Indexed: 02/01/2023] Open
Abstract
Although the non-covalent interactions between proteins and salts contributing to the Hofmeister effects have been generally mapped, there are many questions regarding the specifics of these interactions. We report here studies involving the small protein ubiquitin and salts of polarizable anions. These studies reveal a complex interplay between the reverse Hofmeister effect at low pH, the salting-in Hofmeister effect at higher pH, and six anion binding sites in ubiquitin at the root of these phenomena. These sites are all located at protuberances of preorganized secondary structure, and although stronger at low pH, are still apparent when ubiquitin possesses no net charge. These results demonstrate the traceability of these Hofmeister phenomena and suggest new strategies for understanding the supramolecular properties of proteins. Studying the supramolecular properties of Ubiquitin reveals six anion binding sites that contribute to the reverse Hofmeister effect at low pH and the salting-in Hofmeister effect at higher pH.![]()
Collapse
Affiliation(s)
- Wei Yao
- Department of Chemistry, Tulane University New Orleans LA 70118 USA
| | - Kaiyu Wang
- Department of Chemistry, Tulane University New Orleans LA 70118 USA
| | - Aide Wu
- Department of Physics and Engineering Physics, Tulane University New Orleans LA 70118 USA
| | - Wayne F Reed
- Department of Physics and Engineering Physics, Tulane University New Orleans LA 70118 USA
| | - Bruce C Gibb
- Department of Chemistry, Tulane University New Orleans LA 70118 USA
| |
Collapse
|
35
|
Blank M, Hopf C. Spatially resolved mass spectrometry analysis of amyloid plaque-associated lipids. J Neurochem 2020; 159:330-342. [PMID: 33048341 DOI: 10.1111/jnc.15216] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/06/2020] [Accepted: 10/04/2020] [Indexed: 12/18/2022]
Abstract
Over the last 10 years, considerable technical advances in mass spectrometry (MS)-based bioanalysis have enabled the investigation of lipid signatures in neuropathological structures. In Alzheimer´s Disease (AD) research, it is now well accepted that lipid dysregulation plays a key role in AD pathogenesis and progression. This review summarizes current MS-based strategies, notably MALDI and ToF-SIMS imaging as well as laser capture microdissection combined with LC-ESI-MS. It also presents recent advances to assess lipid alterations associated with Amyloid-β plaques, one of the hallmarks of AD. Collectively, these methodologies offer new opportunities for the study of lipids, thus pushing forward our understanding of their role in such a complex and still untreatable disease as AD.
Collapse
Affiliation(s)
- Martina Blank
- Center for Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Mannheim, Germany.,Center for Structural Molecular Biology (CEBIME/PROPESQ), Federal University of Santa Catarina, Florianópolis, Brazil
| | - Carsten Hopf
- Center for Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Mannheim, Germany
| |
Collapse
|
36
|
Micera A, Bruno L, Cacciamani A, Rongioletti M, Squitti R. Alzheimer's Disease and Retinal Degeneration: A Glimpse at Essential Trace Metals in Ocular Fluids and Tissues. Curr Alzheimer Res 2020; 16:1073-1083. [PMID: 31642780 DOI: 10.2174/1567205016666191023114015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 09/28/2019] [Accepted: 10/21/2019] [Indexed: 01/19/2023]
Abstract
BACKGROUND Life expectancy is increasing all over the world, although neurodegenerative disorders might drastically affect the individual activity of aged people. Of those, Alzheimer's Disease (AD) is one of the most social-cost age-linked diseases of industrialized countries. To date, retinal diseases seem to be more common in the developing world and characterize principally aged people. Agerelated Macular Degeneration (AMD) is a late-onset, neurodegenerative retinal disease that shares several clinical and pathological features with AD, including stress stimuli such as oxidative stress, inflammation and amyloid formations. METHODS In both diseases, the detrimental intra/extra-cellular deposits have many similarities. Aging, hypercholesterolemia, hypertension, obesity, arteriosclerosis and smoking are risk factors to develop both diseases. Cellular aging routes have similar organelle and signaling patterns in retina and brain. The possibility to find out new research strategies represent a step forward to disclose potential treatment for both of them. Essential trace metals play critical roles in both physiological and pathological condition of retina, optic nerve and brain, by influencing metabolic processes chiefly upon complex multifactorial pathogenesis. CONCLUSION Hence, this review addresses current knowledge about some up-to-date investigated essential trace metals associated with AD and AMD. Changes in the levels of systemic and ocular fluid essential metals might reflect the early stages of AMD, possibly disclosing neurodegeneration pathways shared with AD, which might open to potential early detection.
Collapse
Affiliation(s)
- Alessandra Micera
- Research Laboratories in Ophthalmology, IRCCS - Fondazione Bietti, Rome, Italy
| | - Luca Bruno
- Research Laboratories in Ophthalmology, IRCCS - Fondazione Bietti, Rome, Italy
| | - Andrea Cacciamani
- Research Laboratories in Ophthalmology, IRCCS - Fondazione Bietti, Rome, Italy
| | - Mauro Rongioletti
- Department of Laboratory Medicine, Research and Development Division, San Giovanni Calibita, Fatebenefratelli Hospital, Isola Tiberina, Rome, Italy
| | - Rosanna Squitti
- IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, BS, Italy
| |
Collapse
|
37
|
Pandey G, Ramakrishnan V. Invasive and non-invasive therapies for Alzheimer's disease and other amyloidosis. Biophys Rev 2020; 12:1175-1186. [PMID: 32930962 PMCID: PMC7575678 DOI: 10.1007/s12551-020-00752-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/31/2020] [Indexed: 12/12/2022] Open
Abstract
Advancements in medical science have facilitated in extending human lives. The increased life expectancy, though, has come at a cost. The cases of an aging population suffering from degenerative diseases like Alzheimer's disease (AD) are presently at its all-time high. Amyloidosis disorders such as AD are triggered by an abnormal transition of soluble proteins into their highly ordered aggregated forms. The landscape of amyloidosis treatment remains unchanged, and there is no cure for such disorders. However, an increased understanding of the mechanism of amyloid self-assembly has given hope for a possible therapeutic solution. In this review, we will discuss the current state of molecular and non-molecular options for therapeutic intervention of amyloidosis. We highlight the efficacy of non-invasive physical therapies as possible alternatives to their molecular counterparts. Graphical abstract.
Collapse
Affiliation(s)
- Gaurav Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Vibin Ramakrishnan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
| |
Collapse
|
38
|
Zayas-Santiago A, Díaz-García A, Nuñez-Rodríguez R, Inyushin M. Accumulation of amyloid beta in human glioblastomas. Clin Exp Immunol 2020; 202:325-334. [PMID: 32654112 PMCID: PMC7670151 DOI: 10.1111/cei.13493] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/29/2020] [Accepted: 07/02/2020] [Indexed: 12/12/2022] Open
Abstract
Many cancer types are intrinsically associated with specific types of amyloidosis, in which amyloid is accumulated locally inside tumors or systemically. Usually, this condition relates to the hyperproduction of specific amylogenic proteins. Recently, we found that the accumulation of amyloid beta (Aβ) peptide immunofluorescence is linked to glioma cells in mouse tumors. Here we report that amyloid-specific histochemical dyes reveal amyloid accumulation in all human glioma samples. Application of two different antibodies against Aβ peptide (a polyclonal antibody against human Aβ1-42 and a monoclonal pan-specific mAb-2 antibody against Aβ) showed that the amyloid in glioma samples contains Aβ. Amyloid was linked to glioma cells expressing glial-specific fibrillary acidic protein (GFAP) and to glioma blood vessels. Astrocytes close to the glioma site and to affected vessels also accumulated Aβ. We discuss whether amyloid is produced by glioma cells or is the result of systemic production of Aβ in response to glioma development due to an innate immunity reaction. We conclude that amyloid build-up in glioma tumors is a part of the tumor environment, and may be used as a target for developing a novel class of anti-tumor drugs and as an antigen for glioma visualization.
Collapse
Affiliation(s)
- A Zayas-Santiago
- Physiology Department, Medical School, Universidad Central del Caribe, Bayamon, Puerto Rico
| | - A Díaz-García
- Physiology Department, Medical School, Universidad Central del Caribe, Bayamon, Puerto Rico
| | - R Nuñez-Rodríguez
- Biochemistry Department, Medical School, Universidad Central del Caribe, Bayamon, Puerto Rico
| | - M Inyushin
- Physiology Department, Medical School, Universidad Central del Caribe, Bayamon, Puerto Rico
| |
Collapse
|
39
|
Holubová M, Štěpánek P, Hrubý M. Polymer materials as promoters/inhibitors of amyloid fibril formation. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04710-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
40
|
Three-dimensional real time imaging of amyloid β aggregation on living cells. Sci Rep 2020; 10:9742. [PMID: 32546691 PMCID: PMC7297742 DOI: 10.1038/s41598-020-66129-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 05/13/2020] [Indexed: 01/17/2023] Open
Abstract
Alzheimer’s disease (AD) is a progressive disorder of the brain that gradually decreases thinking, memory, and language abilities. The aggregation process of amyloid β (Aβ) is a key step in the expression of its neurocytotoxicity and development of AD because Aβ aggregation and accumulation around neuronal cells induces cell death. However, the molecular mechanism underlying the neurocytotoxicity and cell death by Aβ aggregation has not been clearly elucidated. In this study, we successfully visualized real-time process of Aβ42 aggregation around living cells by applying our established QD imaging method. 3D observations using confocal laser microscopy revealed that Aβ42 preferentially started to aggregate at the region where membrane protrusions frequently formed. Furthermore, we found that inhibition of actin polymerization using cytochalasin D reduced aggregation of Aβ42 on the cell surface. These results indicate that actin polymerization-dependent cell motility is responsible for the promotion of Aβ42 aggregation at the cell periphery. 3D observation also revealed that the aggregates around the cell remained in that location even if cell death occurred, implying that amyloid plaques found in the AD brain grew from the debris of dead cells that accumulated Aβ42 aggregates.
Collapse
|
41
|
Atrián-Blasco E, Cerrada E, Faller P, Laguna M, Hureau C. Role of PTA in the prevention of Cu(amyloid-β) induced ROS formation and amyloid-β oligomerisation in the presence of Zn. Metallomics 2020; 11:1154-1161. [PMID: 31098605 DOI: 10.1039/c9mt00011a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metal-targeting drugs are being widely explored as a possible treatment for Alzheimer's disease, but most of these ligands are developed to coordinate Cu(ii). In a previous communication (E. Atrián-Blasco, E. Cerrada, A. Conte-Daban, D. Testemale, P. Faller, M. Laguna and C. Hureau, Metallomics, 2015, 7, 1229-1232) we showed another strategy where Cu(i) was targeted with the PTA (1,3,5-triaza-7-phosphaadamantane) ligand that is able to target Cu(ii) as well, reduce it and keep it in a safe complexed species. Removal of Cu(ii) from the amyloid-β peptide prevents the stabilization of oligomers and protofibrils and the complexation of Cu(i) also stops the formation of reactive oxygen species. Besides, zinc, which is found in the synaptic cleft at a higher concentration than copper, can hamper the ability of metal-targeting drug candidates, an issue that is still poorly considered and studied. Here we show that PTA fully retains the above described properties even in the presence of zinc, thus fulfilling an additional pre-requisite for its use as a model of Cu(i)-targeting drug candidates in the Alzheimer's disease context.
Collapse
|
42
|
Chaudhary H, Meister SW, Zetterberg H, Löfblom J, Lendel C. Dissecting the Structural Organization of Multiprotein Amyloid Aggregates Using a Bottom-Up Approach. ACS Chem Neurosci 2020; 11:1447-1457. [PMID: 32315153 PMCID: PMC7243255 DOI: 10.1021/acschemneuro.0c00110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Deposition of fibrillar amyloid β (Aβ) in senile plaques is a pathological signature of Alzheimer's disease. However, senile plaques also contain many other components, including a range of different proteins. Although the composition of the plaques can be analyzed in post-mortem tissue, knowledge of the molecular details of these multiprotein inclusions and their assembly processes is limited, which impedes the progress in deciphering the biochemical mechanisms associated with Aβ pathology. We describe here a bottom-up approach to monitor how proteins from human cerebrospinal fluid associate with Aβ amyloid fibrils to form plaque particles. The method combines flow cytometry and mass spectrometry proteomics and allowed us to identify and quantify 128 components of the captured multiprotein aggregates. The results provide insights into the functional characteristics of the sequestered proteins and reveal distinct interactome responses for the two investigated Aβ variants, Aβ(1-40) and Aβ(1-42). Furthermore, the quantitative data is used to build models of the structural organization of the multiprotein aggregates, which suggests that Aβ is not the primary binding target for all the proteins; secondary interactions account for the majority of the assembled components. The study elucidates how different proteins are recruited into senile plaques and establishes a new model system for exploring the pathological mechanisms of Alzheimer's disease from a molecular perspective.
Collapse
Affiliation(s)
- Himanshu Chaudhary
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Sebastian W. Meister
- Department of Protein Science, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal SE-413 90, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal SE-413 90, Sweden
- Department of Neurodegenerative Disease, UCL Institute of Neurology, London WC1N 3BG, United Kingdom
- UK Dementia Research Institute at UCL, London WC1N 3BG, United Kingdom
| | - John Löfblom
- Department of Protein Science, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| |
Collapse
|
43
|
Rodin S, Kozin SA, Kechko OI, Mitkevich VA, Makarov AA. Aberrant interactions between amyloid-beta and alpha5 laminins as possible driver of neuronal disfunction in Alzheimer's disease. Biochimie 2020; 174:44-48. [PMID: 32311425 DOI: 10.1016/j.biochi.2020.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/12/2020] [Accepted: 04/12/2020] [Indexed: 12/28/2022]
Abstract
It has been widely accepted that laminins are involved in pathogenesis of Alzheimer's disease (AD). Amyloid plaques in AD patients are associated with immunostaining using antibodies raised against laminin-111, and laminin-111 has been shown to prevent aggregation of amyloid peptides. Although numerous articles describe small peptides from laminin-111 that are capable to disaggregate amyloid buildups and reduce neurotoxicity in in vitro and in vivo models, there is no approved laminin-111-based therapeutic approaches for treatment of AD. Also, it has been shown that immunoreactivity to laminin-111 appears late in development of cerebral amyloidosis. Based on the published data, we hypothesize that aberrant interaction between amyloid-beta and α5-laminins such as laminin-511 prevents the necessary laminin signaling into neurons leading to neurodegeneration and contributing to the early development of AD. Laminin-511 is the key extracellular protein that protects neurons from anoikis, inhibits excitoxicity and provides signaling that stabilizes dendritic spines and synapses in the developed brain. Absence of the signaling from laminin-511 leads to behavioral defects in mice. Laminin-511 and hippocampal neurons are in direct contact and accumulation of amyloid-beta that has been shown to avidly bind laminin-511 may physically decouple the interaction between α5-laminins and the neuronal membrane receptors inhibiting the signaling. Under this hypothesis, protein domains and peptides from laminin α5 chain may have a therapeutic potential in treatment of AD and the appearance of laminin-111 in the amyloid plaques is simply a consequence of the disease.
Collapse
Affiliation(s)
- Sergey Rodin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia; Department of Surgical Sciences, Ångström Laboratory, Uppsala University, 752 37, Uppsala, Sweden.
| | - Sergey A Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Olga I Kechko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Vladimir A Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Alexander A Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| |
Collapse
|
44
|
Ayata P, Schaefer A. Innate sensing of mechanical properties of brain tissue by microglia. Curr Opin Immunol 2020; 62:123-130. [PMID: 32058296 PMCID: PMC7067639 DOI: 10.1016/j.coi.2020.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/20/2019] [Accepted: 01/07/2020] [Indexed: 01/09/2023]
Abstract
External organic or inorganic objects (foreign bodies) that are inadvertently or purposefully placed in the human or animal tissues can trigger local tissue responses that aim at the elimination and/or segregation of foreign bodies from the tissue. The foreign body response (FBR) may have major implications for neurodegeneration associated with the formation of aberrant protein-based aggregates or plaques. The distinct physical features of the plaques, including high rigidity and varying surface properties, may trigger microglial mechanosensing of the plaque as a foreign body. The microglial FBR may have a dual function by promoting and/or suppressing the plaque driven neurodegeneration. Microglial contact with the plaque may trigger inflammatory activation of microglia and support microglia-driven neuronal damage. Conversely, persistent microglial activation may trigger the formation of a microglia-supported cell barrier that segregates and compacts the plaques thus preventing further plaque-induced damage to healthy neurons.
Collapse
Affiliation(s)
- Pinar Ayata
- Nash Family Department of Neuroscience, Center for Glial Biology, Ronald M. Loeb Center for Alzheimer’s Disease, Precision Immunology Institute, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Anne Schaefer
- Nash Family Department of Neuroscience, Center for Glial Biology, Ronald M. Loeb Center for Alzheimer’s Disease, Precision Immunology Institute, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY,Corresponding author
| |
Collapse
|
45
|
Gallardo R, Ranson NA, Radford SE. Amyloid structures: much more than just a cross-β fold. Curr Opin Struct Biol 2020; 60:7-16. [PMID: 31683043 DOI: 10.1016/j.sbi.2019.09.001] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/04/2019] [Indexed: 01/10/2023]
Abstract
In recent years our understanding of amyloid structure has been revolutionised by innovations in cryo-electron microscopy, electron diffraction and solid-state NMR. These techniques have yielded high-resolution structures of fibrils isolated from patients with neurodegenerative disease, as well as those formed from amyloidogenic proteins in vitro. The results not only show the expected cross-β amyloid structure, but also reveal that the amyloid fold is unexpectedly diverse and complex. Here, we discuss this diversity, highlighting dynamic regions, ligand binding motifs, cavities, non-protein components, and structural polymorphism. Collectively, these variations combine to allow the generic amyloid fold to be realised in three dimensions in different ways, and this diversity may be related to the roles of fibrils in disease.
Collapse
Affiliation(s)
- Rodrigo Gallardo
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Neil A Ranson
- 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.
| |
Collapse
|
46
|
Choi SI. A Simple Principle for Understanding the Combined Cellular Protein Folding and Aggregation. Curr Protein Pept Sci 2020; 21:3-21. [DOI: 10.2174/1389203720666190725114550] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/09/2019] [Accepted: 07/10/2019] [Indexed: 12/27/2022]
Abstract
Proteins can undergo kinetic/thermodynamic partitioning between folding and aggregation. Proper protein folding and thermodynamic stability are crucial for aggregation inhibition. Thus, proteinfolding principles have been widely believed to consistently underlie aggregation as a consequence of conformational change. However, this prevailing view appears to be challenged by the ubiquitous phenomena that the intrinsic and extrinsic factors including cellular macromolecules can prevent aggregation, independently of (even with sacrificing) protein folding rate and stability. This conundrum can be definitely resolved by ‘a simple principle’ based on a rigorous distinction between protein folding and aggregation: aggregation can be controlled by affecting the intermolecular interactions for aggregation, independently of the intramolecular interactions for protein folding. Aggregation is beyond protein folding. A unifying model that can conceptually reconcile and underlie the seemingly contradictory observations is described here. This simple principle highlights, in particular, the importance of intermolecular repulsive forces against aggregation, the magnitude of which can be correlated with the size and surface properties of molecules. The intermolecular repulsive forces generated by the common intrinsic properties of cellular macromolecules including chaperones, such as their large excluded volume and surface charges, can play a key role in preventing the aggregation of their physically connected polypeptides, thus underlying the generic intrinsic chaperone activity of soluble cellular macromolecules. Such intermolecular repulsive forces of bulky cellular macromolecules, distinct from protein conformational change and attractive interactions, could be the puzzle pieces for properly understanding the combined cellular protein folding and aggregation including how proteins can overcome their metastability to amyloid fibrils in vivo.
Collapse
Affiliation(s)
- Seong Il Choi
- Department of Biochemistry and Biophysics, Stockholm University, SE-106 91 Stockholm, Sweden
| |
Collapse
|
47
|
Wallin C, Friedemann M, Sholts SB, Noormägi A, Svantesson T, Jarvet J, Roos PM, Palumaa P, Gräslund A, Wärmländer SKTS. Mercury and Alzheimer's Disease: Hg(II) Ions Display Specific Binding to the Amyloid-β Peptide and Hinder Its Fibrillization. Biomolecules 2019; 10:E44. [PMID: 31892131 PMCID: PMC7022868 DOI: 10.3390/biom10010044] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023] Open
Abstract
Brains and blood of Alzheimer's disease (AD) patients have shown elevated mercury concentrations, but potential involvement of mercury exposure in AD pathogenesis has not been studied at the molecular level. The pathological hallmark of AD brains is deposition of amyloid plaques, consisting mainly of amyloid-β (Aβ) peptides aggregated into amyloid fibrils. Aβ peptide fibrillization is known to be modulated by metal ions such as Cu(II) and Zn(II). Here, we study in vitro the interactions between Aβ peptides and Hg(II) ions by multiple biophysical techniques. Fluorescence spectroscopy and atomic force microscopy (AFM) show that Hg(II) ions have a concentration-dependent inhibiting effect on Aβ fibrillization: at a 1:1 Aβ·Hg(II) ratio only non-fibrillar Aβ aggregates are formed. NMR spectroscopy shows that Hg(II) ions interact with the N-terminal region of Aβ(1-40) with a micromolar affinity, likely via a binding mode similar to that for Cu(II) and Zn(II) ions, i.e., mainly via the histidine residues His6, His13, and His14. Thus, together with Cu(II), Fe(II), Mn(II), Pb(IV), and Zn(II) ions, Hg(II) belongs to a family of metal ions that display residue-specific binding interactions with Aβ peptides and modulate their aggregation processes.
Collapse
Affiliation(s)
- Cecilia Wallin
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Merlin Friedemann
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Sabrina B. Sholts
- Department of Anthropology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA;
| | - Andra Noormägi
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Teodor Svantesson
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Jüri Jarvet
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
- The National Institute of Chemical Physics and Biophysics, 12618 Tallinn, Estonia
| | - Per M. Roos
- Institute of Environmental Medicine, Karolinska Institutet, 16765 Stockholm, Sweden;
- Department of Clinical Physiology, Capio St. Göran Hospital, 11219 Stockholm, Sweden
| | - Peep Palumaa
- Department of Chemistry and Biotechnology, Tallinn University of Technology, 19086 Tallinn, Estonia; (M.F.); (A.N.); (P.P.)
| | - Astrid Gräslund
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| | - Sebastian K. T. S. Wärmländer
- Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; (C.W.); (T.S.); (J.J.); (A.G.)
| |
Collapse
|
48
|
|
49
|
Stefaniak E, Bal W. Cu II Binding Properties of N-Truncated Aβ Peptides: In Search of Biological Function. Inorg Chem 2019; 58:13561-13577. [PMID: 31304745 DOI: 10.1021/acs.inorgchem.9b01399] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As life expectancy increases, the number of people affected by progressive and irreversible dementia, Alzheimer's Disease (AD), is predicted to grow. No drug designs seem to be working in humans, apparently because the origins of AD have not been identified. Invoking amyloid cascade, metal ions, and ROS production hypothesis of AD, herein we share our point of view on Cu(II) binding properties of Aβ4-x, the most prevalent N-truncated Aβ peptide, currently known as the main constituent of amyloid plaques. The capability of Aβ4-x to rapidly take over copper from previously tested Aβ1-x peptides and form highly stable complexes, redox unreactive and resistant to copper exchange reactions, prompted us to propose physiological roles for these peptides. We discuss the new findings on the reactivity of Cu(II)Aβ4-x with coexisting biomolecules in the context of synaptic cleft; we suggest that the role of Aβ4-x peptides is to quench Cu(II) toxicity in the brain and maintain neurotransmission.
Collapse
Affiliation(s)
- Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| |
Collapse
|
50
|
Abstract
Alzheimer's amyloid beta can perform a wide variety of actions that are highly concentration dependent. This viewpoint aims to provide a framework for basic considerations on what might be considered brain-relevant concentrations of the peptide. Some implications for the therapeutic implementation of the recently emerged oligomer-to-fibril strategy are discussed.
Collapse
Affiliation(s)
- Jevgenij A. Raskatov
- Department of Chemistry and Biochemistry, Physical Science Building 356, 1156 High Street, University of California Santa Cruz, Santa Cruz, CA 95064, USA
| |
Collapse
|