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Laxio Arenas J, Lesma J, Ha-Duong T, Ranjan Sahoo B, Ramamoorthy A, Tonali N, Soulier JL, Halgand F, Giraud F, Crousse B, Kaffy J, Ongeri S. Composition and Conformation of Hetero- versus Homo-Fluorinated Triazolamers Influence their Activity on Islet Amyloid Polypeptide Aggregation. Chemistry 2024; 30:e202303887. [PMID: 38478740 DOI: 10.1002/chem.202303887] [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: 11/22/2023] [Indexed: 04/11/2024]
Abstract
Novel fluorinated foldamers based on aminomethyl-1,4-triazolyl-difluoroacetic acid (1,4-Tz-CF2) units were synthesized and their conformational behaviour was studied by NMR and molecular dynamics. Their activity on the aggregation of the human islet amyloid polypeptide (hIAPP) amyloid protein was evaluated by fluorescence spectroscopy and mass spectrometry. The fluorine labelling of these foldamers allowed the analysis of their interaction with the target protein. We demonstrated that the preferred extended conformation of homotriazolamers of 1,4-Tz-CF2 unit increases the aggregation of hIAPP, while the hairpin-like conformation of more flexible heterotriazolamers containing two 1,4-Tz-CF2 units mixed with natural amino acids from the hIAPP sequence reduces it, and more efficiently than the parent natural peptide. The longer heterotriazolamers having three 1,4-Tz-CF2 units adopting more folded hairpin-like and ladder-like structures similar to short multi-stranded β-sheets have no effect. This work demonstrates that a good balance between the structuring and flexibility of these foldamers is necessary to allow efficient interaction with the target protein.
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Affiliation(s)
- José Laxio Arenas
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Jacopo Lesma
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Tap Ha-Duong
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Bikash Ranjan Sahoo
- Biophysics, Department of Chemistry, Biomedical Engineering, Michigan Neuroscience Institute, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA
| | - Ayyalusamy Ramamoorthy
- Biophysics, Department of Chemistry, Biomedical Engineering, Michigan Neuroscience Institute, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA
| | - Nicolo Tonali
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Jean-Louis Soulier
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Frédéric Halgand
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405, Orsay, France
| | - François Giraud
- Equipe Biologie et Chimie Structurales, Dept Chimie et Biologie Structurales et Analytiques, ICSN, CNRS, Université Paris Saclay, 1 avenue de la terrasse, 91190, Gif sur Yvette, France
| | - Benoît Crousse
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Julia Kaffy
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Sandrine Ongeri
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
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2
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Sarkar D, Bhunia A. Delineating the Role of GxxxG Motif in Amyloidogenesis: A New Perspective in Targeting Amyloid-Beta Mediated AD Pathogenesis. ACS BIO & MED CHEM AU 2024; 4:4-19. [PMID: 38404748 PMCID: PMC10885112 DOI: 10.1021/acsbiomedchemau.3c00055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/18/2023] [Accepted: 10/18/2023] [Indexed: 02/27/2024]
Abstract
The pursuit of a novel structural motif that can shed light on the key functional attributes is a primary focus in the study of protein folding disorders. Decades of research on Alzheimer's disease (AD) have centered on the Amyloid β (Aβ) pathway, highlighting its significance in understanding the disorder. The diversity in the Aβ pathway and the possible silent tracks which are yet to discover, makes it exceedingly intimidating to the interdisciplinary scientific community. Over the course of AD research, Aβ has consistently been at the forefront of scientific inquiry and discussion. In this review, we epitomize the role of a potential structural motif (GxxxG motif) that may provide a new horizon to the Aβ conflict. We emphasize on how comprehensive understanding of this motif from a structure-function perspective may pave the way for designing novel therapeutics intervention in AD and related diseases.
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Affiliation(s)
- Dibakar Sarkar
- Department of Chemical Sciences, Bose Institute, Unified Academic Campus, Sector V, Salt Lake EN
80, Kolkata 700 091, India
| | - Anirban Bhunia
- Department of Chemical Sciences, Bose Institute, Unified Academic Campus, Sector V, Salt Lake EN
80, Kolkata 700 091, India
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3
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Roy R, Paul S. Disparate Effect of Hybrid Peptidomimetics Containing Isomers of Aminobenzoic Acid on hIAPP Aggregation. J Phys Chem B 2022; 126:10427-10444. [PMID: 36459988 DOI: 10.1021/acs.jpcb.2c05970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
The abnormal misfolding of human islet amyloid polypeptide (hIAPP) in pancreatic β-cells is implicated in the progression of type II diabetes (T2D). With the prevalence of T2D increasing worldwide, preventing the aggregation of hIAPP has been recognized as a promising therapeutic strategy to control this disease. Recently, a class of novel conformationally restricted β-sheet breaker hybrid peptidomimetics (BSBHps) was found to demonstrate efficient inhibitory ability toward amyloid formation of hIAPP. One (Ile26) or more (Gly24 and Ile26) residues in these six-membered peptide sequences, which have been extracted from the amyloidogenic core of hIAPP, N22FGAIL27, are substituted by three different isomers of the conformationally restricted aromatic amino acid, i.e., aminobenzoic acid (β, γ, and δ), to generate these BSBHps. The presence of the nonproteinogenic aminobenzoic acid moiety renders the BSBHps to be more stable toward proteolytic degradation. The different isomeric BSBHps exhibit contrasting influence on the self-assembly of hIAPP. The BSBHps containing β- and γ-aminobenzoic acid can sufficiently prevent hIAPP aggregation, but those with the δ-aminobenzoic group stabilize the β-sheet-rich aggregate of hIAPP. The difference in the angle between the amino and carboxyl groups in the isomers of the aminobenzoic moiety causes the BSBHps to attain discrete conformation and hence leads to variation in their binding preference with hIAPP and ultimately their inhibitory potency. This guides the pathway for the dissimilar effect of BSBHps on peptide aggregation and, therefore, provides insights into the design considerations for novel drugs against T2D.
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Affiliation(s)
- Rituparna Roy
- Department of Chemistry, Indian Institute of Technology, Guwahati781039, Assam, India
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati781039, Assam, India
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4
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Sarkar D, Maity NC, Shome G, Varnava KG, Sarojini V, Vivekanandan S, Sahoo N, Kumar S, Mandal AK, Biswas R, Bhunia A. Mechanistic insight into functionally different human islet polypeptide (hIAPP) amyloid: the intrinsic role of the C-terminal structural motifs. Phys Chem Chem Phys 2022; 24:22250-22262. [PMID: 36098073 DOI: 10.1039/d2cp01650h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Targeting amyloidosis requires high-resolution insight into the underlying mechanisms of amyloid aggregation. The sequence-specific intrinsic properties of a peptide or protein largely govern the amyloidogenic propensity. Thus, it is essential to delineate the structural motifs that define the subsequent downstream amyloidogenic cascade of events. Additionally, it is important to understand the role played by extrinsic factors, such as temperature or sample agitation, in modulating the overall energy barrier that prompts divergent nucleation events. Consequently, these changes can affect the fibrillation kinetics, resulting in structurally and functionally distinct amyloidogenic conformers associated with disease pathogenesis. Here, we have focused on human Islet Polypeptide (hIAPP) amyloidogenesis for the full-length peptide along with its N- and C-terminal fragments, under different temperatures and sample agitation conditions. This helped us to gain a comprehensive understanding of the intrinsic role of specific functional epitopes in the primary structure of the peptide that regulates amyloidogenesis and subsequent cytotoxicity. Intriguingly, our study involving an array of biophysical experiments and ex vivo data suggests a direct influence of external changes on the C-terminal fibrillating sequence. Furthermore, the observations indicate a possible collaborative role of this segment in nucleating hIAPP amyloidogenesis in a physiological scenario, thus making it a potential target for future therapeutic interventions.
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Affiliation(s)
- Dibakar Sarkar
- Department of Biophysics, Bose Institute, EN 80, Sector V, Kolkata 700 091, India.
| | - Narayan Chandra Maity
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Sector-III, Salt Lake, Kolkata 700106, India
| | - Gourav Shome
- Division of Molecular Medicine, Bose Institute, EN 80, Sector V, Kolkata 700 091, India
| | - Kyriakos Gabriel Varnava
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Vijayalekshmi Sarojini
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
| | | | - Nirakar Sahoo
- Department of Biology, University of Texas Rio Grande Valley, Edinburg, Texas, 78539, USA
| | - Sourav Kumar
- Department of Biophysics, Bose Institute, EN 80, Sector V, Kolkata 700 091, India.
| | - Atin Kumar Mandal
- Division of Molecular Medicine, Bose Institute, EN 80, Sector V, Kolkata 700 091, India
| | - Ranjit Biswas
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Sector-III, Salt Lake, Kolkata 700106, India
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, EN 80, Sector V, Kolkata 700 091, India.
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5
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Roham PH, Save SN, Sharma S. Human islet amyloid polypeptide: A therapeutic target for the management of type 2 diabetes mellitus. J Pharm Anal 2022; 12:556-569. [PMID: 36105173 PMCID: PMC9463490 DOI: 10.1016/j.jpha.2022.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 03/21/2022] [Accepted: 04/01/2022] [Indexed: 12/22/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) and other metabolic disorders are often silent and go unnoticed in patients because of the lack of suitable prognostic and diagnostic markers. The current therapeutic regimens available for managing T2DM do not reverse diabetes; instead, they delay the progression of diabetes. Their efficacy (in principle) may be significantly improved if implemented at earlier stages. The misfolding and aggregation of human islet amyloid polypeptide (hIAPP) or amylin has been associated with a gradual decrease in pancreatic β-cell function and mass in patients with T2DM. Hence, hIAPP has been recognized as a therapeutic target for managing T2DM. This review summarizes hIAPP's role in mediating dysfunction and apoptosis in pancreatic β-cells via induction of endoplasmic reticulum stress, oxidative stress, mitochondrial dysfunction, inflammatory cytokine secretion, autophagy blockade, etc. Furthermore, it explores the possibility of using intermediates of the hIAPP aggregation pathway as potential drug targets for T2DM management. Finally, the effects of common antidiabetic molecules and repurposed drugs; other hIAPP mimetics and peptides; small organic molecules and natural compounds; nanoparticles, nanobodies, and quantum dots; metals and metal complexes; and chaperones that have demonstrated potential to inhibit and/or reverse hIAPP aggregation and can, therefore, be further developed for managing T2DM have been discussed. Misfolded species of hIAPP form toxic oligomers in pancreatic β-cells. hIAPP amyloids has been detected in the pancreas of about 90% subjects with T2DM. Inhibitors of hIAPP aggregation can help manage T2DM.
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Louros N, Ramakers M, Michiels E, Konstantoulea K, Morelli C, Garcia T, Moonen N, D'Haeyer S, Goossens V, Thal DR, Audenaert D, Rousseau F, Schymkowitz J. Mapping the sequence specificity of heterotypic amyloid interactions enables the identification of aggregation modifiers. Nat Commun 2022; 13:1351. [PMID: 35292653 PMCID: PMC8924238 DOI: 10.1038/s41467-022-28955-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 02/11/2022] [Indexed: 02/07/2023] Open
Abstract
Heterotypic amyloid interactions between related protein sequences have been observed in functional and disease amyloids. While sequence homology seems to favour heterotypic amyloid interactions, we have no systematic understanding of the structural rules determining such interactions nor whether they inhibit or facilitate amyloid assembly. Using structure-based thermodynamic calculations and extensive experimental validation, we performed a comprehensive exploration of the defining role of sequence promiscuity in amyloid interactions. Using tau as a model system we demonstrate that proteins with local sequence homology to tau amyloid nucleating regions can modify fibril nucleation, morphology, assembly and spreading of aggregates in cultured cells. Depending on the type of mutation such interactions inhibit or promote aggregation in a manner that can be predicted from structure. We find that these heterotypic amyloid interactions can result in the subcellular mis-localisation of these proteins. Moreover, equilibrium studies indicate that the critical concentration of aggregation is altered by heterotypic interactions. Our findings suggest a structural mechanism by which the proteomic background can modulate the aggregation propensity of amyloidogenic proteins and we discuss how such sequence-specific proteostatic perturbations could contribute to the selective cellular susceptibility of amyloid disease progression. In this work, Louros et al. uncover a rule book for interactions of amyloids with other proteins. This grammar was shown to promote cellular spreading of tau aggregates in cells, but can also be harvested to develop structure-based aggregation blockers.
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Affiliation(s)
- Nikolaos Louros
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Meine Ramakers
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Emiel Michiels
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Katerina Konstantoulea
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Chiara Morelli
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Teresa Garcia
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Nele Moonen
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Sam D'Haeyer
- VIB Screening Core, Ghent, Belgium.,Centre for Bioassay Development and Screening (C-BIOS), Ghent University, Ghent, Belgium
| | - Vera Goossens
- VIB Screening Core, Ghent, Belgium.,Centre for Bioassay Development and Screening (C-BIOS), Ghent University, Ghent, Belgium
| | - Dietmar Rudolf Thal
- KU Leuven, Leuven Brain Institute, 3000, Leuven, Belgium.,Laboratory for Neuropathology, KU Leuven, and Department of Pathology, UZ Leuven, 3000, Leuven, Belgium
| | - Dominique Audenaert
- VIB Screening Core, Ghent, Belgium.,Centre for Bioassay Development and Screening (C-BIOS), Ghent University, Ghent, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium. .,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium.
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000, Leuven, Belgium. .,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium.
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7
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Roy R, Paul S. hIAPP-Amyloid-Core Derived d-Peptide Prevents hIAPP Aggregation and Destabilizes Its Protofibrils. J Phys Chem B 2022; 126:822-839. [DOI: 10.1021/acs.jpcb.1c10395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rituparna Roy
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India, 781039
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India, 781039
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Ghosh P, Bera A, Bhadury P, De P. From Small Molecules to Synthesized Polymers: Potential Role in Combating Amyloidogenic Disorders. ACS Chem Neurosci 2021; 12:1737-1748. [PMID: 33929827 DOI: 10.1021/acschemneuro.1c00104] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The concept of developing novel anti-amyloid inhibitors in the scientific community has engrossed remarkable research interests and embraced significant potential to resolve numerous pathological conditions including neurological as well as non-neuropathic disorders associated with amyloid protein aggregation. These pathological conditions have harmful effects on cellular activities which include malfunctioning of organs and tissue, cellular impairment, etc. To date, different types of small molecular probes like polyphenolic compounds, nanomaterials, surfactants, etc. have been developed to address these issues. Recently synthetic polymeric materials are extensively investigated to explore their role in the protein aggregation pathway. On the basis of these perspectives, in this review article, we have comprehensively summarized the current perspectives on protein misfolding and aggregation and importance of therapeutic approaches in designing novel effective inhibitors. The main purpose of this review article is to provide a detailed perspective of the current landscape as well as trailblazing voyage of various inhibitors ranging from small molecular probes to polymeric scaffolds in the field of protein misfolding and aggregation. A particular emphasis is given on the structural role and molecular mechanistic pathway involved in modulating the aggregation pathway to further inspire the researchers and shed light in this bright research field.
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Fraczyk A, Janczewski L, Wasko J, Rozniakowski K, Galecki K, Kaminski ZJ, Kolesinska B. Non-Aggregating Amylin Fragments as an Inhibitors of the Aggregation Process of Susceptible to Aggregation Fragments 18-22, 23-27, and 33-37 of Hormone. Chem Biodivers 2021; 18:e2100034. [PMID: 33687147 DOI: 10.1002/cbdv.202100034] [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: 01/16/2021] [Accepted: 02/18/2021] [Indexed: 11/10/2022]
Abstract
Amylin aggregation is one of the factors in the development of diabetes mellitus, which is classified as a civilization disease. The aim of this research was to find whether non-aggregating fragments 1-7, 8-12, 13-17 and 28-32 of amylin would inhibit the aggregation of the amyloidogenic cores 18-22, 23-27, 33-37 of hormone. In the study of the inhibitory potential of non-aggregating amylin fragments, a set of independent methods were used to study aggregation properties (spectroscopic and fluorescence studies with the use of indicators, microscopic studies, circular dichroism studies) and the method of prediction of aggregation properties. The performed research allowed to select the cyclic fragment (1-7) H-KCNTATC-OH with disulfide bond as an inhibitor capable of inhibiting the aggregation of all amyloidogenic cores 18-22, 23-27, 33-37 of the hormone. Additionally, it was found that this peptide inhibits insulin hot spot aggregation, which may indicate its universal utility in inhibiting the process of aggregation of hormones regulating carbohydrate metabolism directly related to the development of diabetes. Research on the possibility of the extensive use of the cyclic fragment (1-7) of H-KCNTATC-OH as a peptide inhibitor of the polypeptide/protein aggregation process is ongoing.
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Affiliation(s)
- Andrzej Fraczyk
- Institute of Applied Computer Science, Lodz University of Technology, Stefanowskiego Łódź, 18/22, 90-537, Lodz, Poland
| | - Lukasz Janczewski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Joanna Wasko
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Kamil Rozniakowski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Krystian Galecki
- Institute of General Food Chemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, 90-924, Lodz, Poland
| | - Zbigniew J Kaminski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Beata Kolesinska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
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Kalita S, Kalita S, Paul A, Shah M, Kumar S, Mandal B. Site-specific single point mutation by anthranilic acid in hIAPP 8-37 enhances anti-amyloidogenic activity. RSC Chem Biol 2021; 2:266-273. [PMID: 34458787 PMCID: PMC8341151 DOI: 10.1039/d0cb00178c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 12/24/2020] [Indexed: 12/01/2022] Open
Abstract
Amylin or hIAPP, together with insulin, plays a significant role in glucose metabolism. However, it undergoes β-sheet rich amyloid formation associated with pancreatic β-cell dysfunction leading to type-2 diabetes (T2D). Recent studies suggest that restricting β-sheet formation in it may halt amyloid formation, which may limit the risk for the disease. Several peptide-based inhibitors have been reported to prevent aggregation. However, most of them have limitations, including low binding efficiency, active only at higher doses, poor solubility, and proteolytic degradation. Insertion of non-coded amino acids renders proteolytically stable peptides. We incorporated a structurally rigid β-amino acid, Anthranilic acid (Ant), at different sites within the central hydrophobic region of hIAPP and developed two singly mutated hIAPP8–37 peptidomimetics. These peptidomimetics inhibited the amyloid formation of hIAPP substantially even at low concentration, as evident from in vitro ThT, CD, FT-IR, TEM, and Congo red staining birefringence results. These peptidomimetics also disrupted the preformed aggregates formed by hIAPP into non-toxic species. These β-amino acid-based peptidomimetics can be an attractive scaffold for therapeutic design towards T2D or other protein misfolding diseases. β-Amino acid based peptidomimetics are attractive scaffolds for therapeutics design towards T2D. They prevent amyloid formation of hIAPP by forming non-fibrillar non-toxic aggregates.![]()
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Affiliation(s)
- Sourav Kalita
- Laboratory of Peptide and Amyloid Research, Department of Chemistry, Indian Institute of Technology Guwahati Assam-781039 India
| | - Sujan Kalita
- Laboratory of Peptide and Amyloid Research, Department of Chemistry, Indian Institute of Technology Guwahati Assam-781039 India
| | - Ashim Paul
- Laboratory of Peptide and Amyloid Research, Department of Chemistry, Indian Institute of Technology Guwahati Assam-781039 India
| | - Manisha Shah
- Department of Biosciences & Bioengineering, Indian Institute of Technology Guwahati Assam-781039 India
| | - Sachin Kumar
- Department of Biosciences & Bioengineering, Indian Institute of Technology Guwahati Assam-781039 India
| | - Bhubaneswar Mandal
- Laboratory of Peptide and Amyloid Research, Department of Chemistry, Indian Institute of Technology Guwahati Assam-781039 India
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11
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Rozniakowski K, Galecki K, Wietrzyk J, Filip-Psurska B, Fraczyk J, Kaminski ZJ, Kolesinska B. N-Methylated Analogs of hIAPP Fragments 18-22, 23-27, 33-37 Inhibit Aggregation of the Amyloidogenic Core of the Hormone. Chem Biodivers 2020; 18:e2000842. [PMID: 33331666 DOI: 10.1002/cbdv.202000842] [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: 10/11/2020] [Accepted: 11/20/2020] [Indexed: 11/11/2022]
Abstract
Amylin (hIAPP) aggregation leads to the formation of insoluble deposits and is one of the factors in the development of type II diabetes. The aim of this research was to find N-methylated analogs of the aggregating amylin fragments 18-22, 23-27, and 33-37, which would not themselves be susceptible to aggregation and would inhibit the aggregation of the amyloidogenic cores of the hormone. None of the analogs of fragment 18-22 containing one or two N-methylated amino acid residues showed any tendency to aggregate. Only the peptide H-F(N-Me)GA(N-Me) IL-OH (6) derived from the 23-27 hIAPP hot spot did not form fibrous structures. All analogs of the 33-37 amylin fragment were characterized by the ability to form aggregates, despite the presence of N-methylated amino acids in their structures. N-Methylated peptides 1-5 demonstrated inhibitory properties against the aggregation of fragment 18-22. Aggregation of the amyloidogenic core of 23-27 was significantly inhibited by N-methylated peptides 1-3 derived from the (18-22) H-HSSNN-OH fragment and by the H-F(N-Me)GA(N-Me)IL-OH (6) fragment derived from the 23-27 amylin hot spot. Fragment (33-37) H-GSNTY-NH2 was found to be inhibited in the presence of N-methylated peptides 1-3 derived from the 18-22 fragment and by the double methylated peptide H-F(N-Me)GA(N-Me)IL-OH (6). Research on the possibility of using N-methylated analogs of amyloidogenic amylin cores as inhibitors of hormone aggregation is ongoing, with a focus on finding the minimum concentration of N-methylated peptides capable of inhibiting the aggregation of hIAPP hot spots.
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Affiliation(s)
- Kamil Rozniakowski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Krystian Galecki
- Institute of General Food Chemistry, Faculty of Biotechnology & Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, 90-924, Lodz, Poland
| | - Joanna Wietrzyk
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 12 Rudolfa Weigla St., 53-114, Wroclaw, Poland
| | - Beata Filip-Psurska
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 12 Rudolfa Weigla St., 53-114, Wroclaw, Poland
| | - Justyna Fraczyk
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Zbigniew J Kaminski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Beata Kolesinska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
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12
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Tang Y, Zhang D, Zhang Y, Liu Y, Gong X, Chang Y, Ren B, Zheng J. Introduction and Fundamentals of Human Islet Amyloid Polypeptide Inhibitors. ACS APPLIED BIO MATERIALS 2020; 3:8286-8308. [DOI: 10.1021/acsabm.0c01234] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yijing Tang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
| | - Dong Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
| | - Yanxian Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
| | - Yonglan Liu
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
| | - Xiong Gong
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325-0301, United States
| | - Yung Chang
- Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320, Taiwan
| | - Baiping Ren
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
| | - Jie Zheng
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325-3906, United States
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13
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Roy R, Paul S. Theoretical Investigation of the Inhibitory Mechanism of Norepinephrine on hIAPP Amyloid Aggregation and the Destabilization of Protofibrils. J Phys Chem B 2020; 124:10913-10929. [DOI: 10.1021/acs.jpcb.0c07830] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Rituparna Roy
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
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14
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Saini RK, Goyal D, Goyal B. Targeting Human Islet Amyloid Polypeptide Aggregation and Toxicity in Type 2 Diabetes: An Overview of Peptide-Based Inhibitors. Chem Res Toxicol 2020; 33:2719-2738. [PMID: 33124419 DOI: 10.1021/acs.chemrestox.0c00416] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Type 2 diabetes (T2D) is a chronic metabolic disease characterized by insulin resistance and a progressive loss of pancreatic islet β-cell mass, which leads to insufficient secretion of insulin and hyperglycemia. Emerging evidence suggests that toxic oligomers and fibrils of human islet amyloid polypeptide (hIAPP) contribute to the death of β-cells and lead to T2D pathogenesis. These observations have opened new avenues for the development of islet amyloid therapies for the treatment of T2D. The peptide-based inhibitors are of great value as therapeutic agents against hIAPP aggregation in T2D owing to their biocompatibility, feasibility of synthesis and modification, high specificity, low toxicity, proteolytic stability (modified peptides), and weak immunogenicity as well as the large size of involved interfaces during self-aggregation of hIAPP. An understanding of what has been done and achieved will provide key insights into T2D pathology and assist in the discovery of more potent drug candidates for the treatment of T2D. In this article, we review various peptide-based inhibitors of hIAPP aggregation, including those derived from the hIAPP sequence and those not based on the sequence, consisting of both natural as well as unnatural amino acids and their derivatives. The present review will be beneficial in advancing the field of peptide medicine for the treatment of T2D.
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Affiliation(s)
- Rajneet Kaur Saini
- Department of Chemistry, Faculty of Basic and Applied Sciences, Sri Guru Granth Sahib World University, Fatehgarh Sahib 140406, Punjab India
| | - Deepti Goyal
- Department of Chemistry, Faculty of Basic and Applied Sciences, Sri Guru Granth Sahib World University, Fatehgarh Sahib 140406, Punjab India
| | - Bhupesh Goyal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab India
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15
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Mitra A, Sarkar N. Sequence and structure-based peptides as potent amyloid inhibitors: A review. Arch Biochem Biophys 2020; 695:108614. [PMID: 33010227 DOI: 10.1016/j.abb.2020.108614] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023]
Abstract
Misfolded and natively disordered globular proteins tend to aggregate together in an interwoven fashion to form fibrous, proteinaceous deposits referred to as amyloid fibrils. Formation and deposition of such insoluble fibrils are the characteristic features of a broad group of diseases, known as amyloidosis. Some of these proteins are known to cause several degenerative disorders in humans, such as Amyloid-Beta (Aβ) in Alzheimer's disease (AD), human Islet Amyloid Polypeptide (hIAPP, amylin) in type 2 diabetes, α-synuclein (α-syn) in Parkinson's disease (PD) and so on. The fact that these proteins do not share any significant sequence or structural homology in their native states make therapy quite challenging. However, it is observed that aggregation-prone proteins and peptides tend to adopt a similar type of secondary structure during the formation of fibrils. Rationally designed peptides can be a potent inhibitor that has been shown to disrupt the fibril structure by binding specifically to the amyloidogenic region(s) within a protein. The following review will analyze the inhibitory potency of both sequence-based and structure-based small peptides that have been shown to inhibit amyloidogenesis of proteins such as Aβ, human amylin, and α-synuclein.
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Affiliation(s)
- Amit Mitra
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, 769008, Odisha, India
| | - Nandini Sarkar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, 769008, Odisha, India.
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16
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Armiento V, Spanopoulou A, Kapurniotu A. Peptide-Based Molecular Strategies To Interfere with Protein Misfolding, Aggregation, and Cell Degeneration. Angew Chem Int Ed Engl 2020; 59:3372-3384. [PMID: 31529602 PMCID: PMC7064928 DOI: 10.1002/anie.201906908] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Indexed: 12/31/2022]
Abstract
Protein misfolding into amyloid fibrils is linked to more than 40 as yet incurable cell- and neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and type 2 diabetes. So far, however, only one of the numerous anti-amyloid molecules has reached patients. This Minireview gives an overview of molecular strategies and peptide chemistry "tools" to design, develop, and discover peptide-based molecules as anti-amyloid drug candidates. We focus on two major inhibitor rational design strategies: 1) the oldest and most common strategy, based on molecular recognition elements of amyloid self-assembly, and 2) a more recent approach, based on cross-amyloid interactions. We discuss why peptide-based amyloid inhibitors, in particular their advanced generations, can be promising leads or candidates for anti-amyloid drugs as well as valuable tools for deciphering amyloid-mediated cell damage and its link to disease pathogenesis.
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Affiliation(s)
- Valentina Armiento
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
| | - Anna Spanopoulou
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
- Current address: Coriolis Pharma Research GmbHFraunhoferstrasse 18B82152PlaneggGermany
| | - Aphrodite Kapurniotu
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
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17
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Bolarinwa O, Li C, Khadka N, Li Q, Wang Y, Pan J, Cai J. γ-AApeptides-based Small Molecule Ligands That Disaggregate Human Islet Amyloid Polypeptide. Sci Rep 2020; 10:95. [PMID: 31919432 PMCID: PMC6952368 DOI: 10.1038/s41598-019-56500-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 11/26/2019] [Indexed: 01/21/2023] Open
Abstract
The abnormal folding and aggregation of functional proteins into amyloid is a typical feature of many age-related diseases, including Type II diabetes. Growing evidence has revealed that the prevention of aggregate formation in culprit proteins could retard the progression of amyloid diseases. Human Amylin, also known as human islet amyloid polypeptide (hIAPP), is the major factor for categorizing Type II diabetes as an amyloid disease. Specifically, hIAPP has a great aggregation potential, which always results in a lethal situation for the pancreas. Many peptide inhibitors have been constructed from the various segments of the full-length hIAPP peptide; however, only a few have their origin from the screening of combinatorial peptidomimetic library. In this study, based on HW-155, which was previously discovered from a one-bead-one compound (OBOC) library to inhibit Aβ40 aggregation, we investigated eight (8) analogues and evaluated their amyloid-prevention capabilities for inhibiting fibrillization of hIAPP. Characterization studies revealed that all analogues of HW-155, as well as HW-155, were effective inhibitors of the fibril formation by hIAPP.
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Affiliation(s)
- Olapeju Bolarinwa
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida, 33620, United States
| | - Chunpu Li
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida, 33620, United States
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Nawal Khadka
- Department of Physics, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida, 33620, United States
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Yan Wang
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Jianjun Pan
- Department of Physics, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida, 33620, United States.
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida, 33620, United States.
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18
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Xuan Q, He J, Li M, Chai R, Wang C, Wang Y, Wang P. Monomer-targeting affinity peptide inhibitors of amyloid with no self-fibrillation and low cytotoxicity. Chem Commun (Camb) 2020; 56:1633-1636. [DOI: 10.1039/c9cc08671d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A monomer-targeting strategy based on solution-phase biopanning to obtain peptide inhibitors increases the suppression efficiency and reduces the cytotoxicity of amylin.
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Affiliation(s)
- Qize Xuan
- State Key Laboratory of Bioreactor Engineering
- Biomedical Nanotechnology Center
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology
- School of Biotechnology
- East China University of Science and Technology
| | - Jiaxin He
- State Key Laboratory of Bioreactor Engineering
- Biomedical Nanotechnology Center
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology
- School of Biotechnology
- East China University of Science and Technology
| | - Min Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- China
| | - Ruoshi Chai
- State Key Laboratory of Bioreactor Engineering
- Biomedical Nanotechnology Center
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology
- School of Biotechnology
- East China University of Science and Technology
| | - Chenxuan Wang
- State Key Laboratory of Medical Molecular Biology
- Institute of Basic Medical Sciences
- Chinese Academy of Medical Sciences
- Department of Biophysics and Structural Biology
- Peking Union Medical College
| | - Yibing Wang
- State Key Laboratory of Bioreactor Engineering
- Biomedical Nanotechnology Center
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology
- School of Biotechnology
- East China University of Science and Technology
| | - Ping Wang
- Department of Bioproducts and Biosystems Engineering
- University of Minnesota
- St Paul
- USA
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19
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Kumari A, Sharma R, Shrivastava N, Somvanshi P, Grover A. Bleomycin modulates amyloid aggregation in β-amyloid and hIAPP. RSC Adv 2020; 10:25929-25946. [PMID: 35518630 PMCID: PMC9055351 DOI: 10.1039/d0ra04949b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 06/29/2020] [Indexed: 12/06/2022] Open
Abstract
Aberrant misfolding and amyloid aggregation, which result in amyloid fibrils, are frequent and critical pathological incidents in various neurodegenerative disorders. Multiple drugs or inhibitors have been investigated to avert amyloid aggregation in individual peptides, exhibiting sequence-dependent inhibition mechanisms. Establishing or inventing inhibitors capable of preventing amyloid aggregation in a wide variety of amyloid peptides is quite a daunting task. Bleomycin (BLM), a complex glycopeptide, has been widely used as an antibiotic and antitumor drug due to its ability to inhibit DNA metabolism, and as an antineoplastic, especially for solid tumors. In this study, we investigated the dual inhibitory effects of BLM on Aβ aggregation, associated with Alzheimer's disease and hIAPP, which is linked to type 2 diabetes, using both computational and experimental techniques. Combined results from drug repurposing and replica exchange molecular dynamics simulations demonstrate that BLM binds to the β-sheet region considered a hotspot for amyloid fibrils of Aβ and hIAPP. BLM was also found to be involved in β-sheet destabilization and, ultimately, in its reduction. Further, experimental validation through in vitro amyloid aggregation assays was obtained wherein the fibrillar load was decreased for the BLM-treated Aβ and hIAPP peptides in comparison to controls. For the first time, this study shows that BLM is a dual inhibitor of Aβ and hIAPP amyloid aggregation. In the future, the conformational optimization and processing of BLM may help develop various efficient sequence-dependent inhibitors against amyloid aggregation in various amyloid peptides. Bleomycin acts as a dual inhibitor against both amyloid β and human islet amyloid polypeptide by binding to the β-sheet grooves considered as the amyloids hotspot.![]()
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Affiliation(s)
- Anchala Kumari
- Department of Biotechnology
- Teri School of Advanced Studies
- New Delhi
- India
- School of Biotechnology
| | - Ritika Sharma
- School of Biotechnology
- Jawaharlal Nehru University
- New Delhi
- India
| | | | - Pallavi Somvanshi
- Department of Biotechnology
- Teri School of Advanced Studies
- New Delhi
- India
| | - Abhinav Grover
- School of Biotechnology
- Jawaharlal Nehru University
- New Delhi
- India
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20
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Armiento V, Spanopoulou A, Kapurniotu A. Peptid‐basierte molekulare Strategien zum Einsatz bei Proteinfehlfaltung, Proteinaggregation und Zelldegeneration. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Valentina Armiento
- Fachgebiet PeptidbiochemieTUM School of Life SciencesTechnische Universität München Emil-Erlenmeyer-Forum 5 85354 Freising Deutschland
| | - Anna Spanopoulou
- Fachgebiet PeptidbiochemieTUM School of Life SciencesTechnische Universität München Emil-Erlenmeyer-Forum 5 85354 Freising Deutschland
- Aktuelle Adresse: Coriolis Pharma Research GmbH Fraunhoferstraße 18B 82152 Planegg Deutschland
| | - Aphrodite Kapurniotu
- Fachgebiet PeptidbiochemieTUM School of Life SciencesTechnische Universität München Emil-Erlenmeyer-Forum 5 85354 Freising Deutschland
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21
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Kumar AP, Lee S, Lukman S. Computational and Experimental Approaches to Design Inhibitors of Amylin Aggregation. Curr Drug Targets 2019; 20:1680-1694. [DOI: 10.2174/1389450120666190719164316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 01/21/2023]
Abstract
Amylin is a neuroendocrine peptide hormone secreted by pancreatic ß-cells; however,
amylin is toxic to ß-cells when it is aggregated in type 2 diabetes mellitus (T2DM). It is important to
understand amylin’s structures and aggregation mechanism for the discovery and design of effective
drugs to inhibit amylin aggregation. In this review, we investigated experimental and computational
studies on amylin structures and inhibitors. Our review provides some novel insights into amylin, particularly
for the design of its aggregation inhibitors to treat T2DM. We detailed the potential inhibitors
that have been studied hitherto and highlighted the neglected need to consider different amylin attributes
that depend on the presence/absence of physiologically relevant conditions, such as membranes.
These conditions and the experimental methods can greatly influence the results of studies on amylininhibitor
complexes. Text-mining over 3,000 amylin-related PubMed abstracts suggests the combined
therapeutic potential of amylin with leptin and glucagon-like peptide-1, which are two key hormones
in obesity. The results also suggest that targeting amylin aggregation can contribute to therapeutic efforts
for Alzheimer’s disease (AD). Therefore, we have also reviewed the role of amylin in other conditions
including obesity and AD. Finally, we provided insights for designing inhibitors of different
types (small molecules, proteins, peptides/mimetics, metal ions) to inhibit amylin aggregation.
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Affiliation(s)
- Ammu Prasanna Kumar
- Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Sungmun Lee
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, College of Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Suryani Lukman
- Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
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22
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Zhu X, Wen Y, Zhao Y, Liu Y, Sun J, Liu J, Liu J, Chen L. Functionalized chitosan-modified defect-related luminescent mesoporous silica nanoparticles as new inhibitors for hIAPP aggregation. NANOTECHNOLOGY 2019; 30:315705. [PMID: 30917341 DOI: 10.1088/1361-6528/ab13ef] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Human islet amyloid polypeptide (hIAPP or amylin) forms the amyloid deposits that is an important factor in the induction of type II diabetes. Accordingly, it is essential to efficiently and accurately inhibit the aggregation of hIAPP for the treatment and prevention of the disease. Here, defect mesoporous silica (DLMSN), with blue fluorescence, can perfectly achieve the accurate positioning in cells or organisms. DL@CS@NF cannot only specifically bind to a hIAPP monomer, but also effectively inhibit hIAPP aggregation, reduce cytotoxicity and overcome the instability and inefficiency of NF(N-Me)GA(N-Me)IL (NF). Furthermore, DL@CS@NF nanoparticles can significantly improve the survival rate of islet cells, stabilize the mitochondrial membrane potential, reduce the content of intracellular reactive oxygen species. In summary, DL@CS@NF nanoparticles may have broader implications in inhibiting the aggregation of hIAPP and reducing cytotoxicity.
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Affiliation(s)
- Xufeng Zhu
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, People's Republic of China
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23
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Xu J, Zhang B, Gong G, Huang X, Du W. Inhibitory effects of oxidovanadium complexes on the aggregation of human islet amyloid polypeptide and its fragments. J Inorg Biochem 2019; 197:110721. [PMID: 31146152 DOI: 10.1016/j.jinorgbio.2019.110721] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/26/2019] [Accepted: 05/13/2019] [Indexed: 10/26/2022]
Abstract
Human islet amyloid polypeptide (hIAPP) is synthesized by pancreatic β-cells and co-secreted with insulin. Misfolding and amyloidosis of hIAPP induce β-cell dysfunction in type II diabetes mellitus. Numerous small organic molecules and metal complexes act as inhibitors against amyloid-related diseases, justifying the need to explore the inhibitory mechanism of these compounds. In this work, three oxidovanadium complexes, namely, (NH4)[VO(O2)2(bipy)]·4H2O (1) (bipy = 2,2' bipyridine), bis(ethyl-maltolato, O,O)oxido-vanadium(IV) (2), and (bipyH2)H2[O{VO(O2)(bipy)}2]·5H2O (3), were synthesized and used to inhibit the aggregation of hIAPP and its fragments, namely, hIAPP19-37 and hIAPP20-29. Results revealed that shortening the peptide sequence decreased the aggregation capability of hIAPP fragments, and the oxidovanadium complexes inhibited the fibrillization of hIAPP better than its fragments. Interestingly, the binding of oxidovanadium complexes to hIAPP and its fragments presented a distinct thermodynamic behavior. Oxidovanadium complexes featured the disaggregation capability against hIAPP, better than against its fragments. These complexes also decreased the cytotoxicity caused by hIAPP and its fragments by reducing the production of oligomers. 3 may be a good hIAPP inhibitor based on its inhibition, disaggregation capability, and regulatory effect on peptide-induced cytotoxicity. Oxidovanadium complexes exhibit potential as metallodrugs against amyloidosis-related diseases.
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Affiliation(s)
- Jufei Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Baohong Zhang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Gehui Gong
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiangyi Huang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
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24
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Sivanesam K, Andersen N. Pre-structured hydrophobic peptide β-strands: A universal amyloid trap? Arch Biochem Biophys 2019; 664:51-61. [PMID: 30707943 PMCID: PMC7094768 DOI: 10.1016/j.abb.2019.01.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 01/28/2019] [Accepted: 01/28/2019] [Indexed: 01/21/2023]
Abstract
Amyloid fibril formation has long been studied because of the variety of proteins that are capable of adopting this structure despite sharing little sequence homology. This makes amyloid fibrils a challenging focus for inhibition studies because the peptides and proteins that form amyloid fibrils cannot be targeted based on a sequence motif. Most peptide inhibitors that target specific amyloidogenic proteins rely heavily on sequence recognition to ensure that the inhibitory peptide is able to bind its target. This approach is limited to targeting one amyloidogenic protein at a time. However, there is increasing evidence of cross-reactivity between amyloid-forming polypeptides. It has therefore become more useful to study the similarities between these proteins that goes beyond their sequence homology. Indeed, the observation that amyloidogenic proteins adopt similar secondary structures along the pathway to fibril formation opens the way to an interesting investigation: the development of inhibitors that could be universal amyloid traps. The review below will analyze two specific amyloidogenic proteins, α-synuclein and human amylin, and introduce a small number of peptides that have been shown to be capable of inhibiting the amyloidogenesis of both of these very dissimilar polypeptides. Some of the inhibitory peptide motifs may indeed, be applicable to Aβ and other amyloidogenic systems.
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25
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Bai C, Lin D, Mo Y, Lei J, Sun Y, Xie L, Yang X, Wei G. Influence of fullerenol on hIAPP aggregation: amyloid inhibition and mechanistic aspects. Phys Chem Chem Phys 2019; 21:4022-4031. [DOI: 10.1039/c8cp07501h] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
C60(OH)24inhibits hIAPP aggregation by suppressing the fibril-prone structure and destabilizes hIAPP protofibrils by binding to the amyloid core region.
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Affiliation(s)
- Cuiqin Bai
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Dongdong Lin
- Department of Microelectronic Science and Engineering Science Faculty of Science
- Ningbo University
- Ningbo 315211
- P. R. China
| | - Yuxiang Mo
- College of Physical Science and Technology
- Guangxi Normal University
- 15 Yucai Road
- Guilin
- China
| | - Jiangtao Lei
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Yunxiang Sun
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Luogang Xie
- College of Physics and Electronic Engineering
- Zhengzhou University of Light Industry
- Zhengzhou 453002
- People's Republic of China
| | - Xinju Yang
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Guanghong Wei
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
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26
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Aviolat H, Nominé Y, Gioria S, Bonhoure A, Hoffmann D, Ruhlmann C, Nierengarten H, Ruffenach F, Villa P, Trottier Y, Klein FAC. SynAggreg: A Multifunctional High-Throughput Technology for Precision Study of Amyloid Aggregation and Systematic Discovery of Synergistic Inhibitor Compounds. J Mol Biol 2018; 430:5257-5279. [PMID: 30266595 DOI: 10.1016/j.jmb.2018.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/30/2018] [Accepted: 09/11/2018] [Indexed: 11/19/2022]
Abstract
Numerous proteins can coalesce into amyloid self-assemblies, which are responsible for a class of diseases called amyloidoses, but which can also fulfill important biological functions and are of great interest for biotechnology. Amyloid aggregation is a complex multi-step process, poorly prone to detailed structural studies. Therefore, small molecules interacting with amyloids are often used as tools to probe the amyloid aggregation pathway and in some cases to treat amyloidoses as they prevent pathogenic protein aggregation. Here, we report on SynAggreg, an in vitro high-throughput (HT) platform dedicated to the precision study of amyloid aggregation and the effect of modulator compounds. SynAggreg relies on an accurate bi-fluorescent amyloid-tracer readout that overcomes some limitations of existing HT methods. It allows addressing diverse aspects of aggregation modulation that are critical for pathomechanistic studies, such as the specificity of compounds toward various amyloids and their effects on aggregation kinetics, as well as the co-assembly propensity of distinct amyloids and the influence of prion-like seeding on self-assembly. Furthermore, SynAggreg is the first HT technology that integrates tailored methodology to systematically identify synergistic compound combinations-an emerging strategy to improve fatal amyloidoses by targeting multiple steps of the aggregation pathway. To this end, we apply analytical combinatorial scores to rank the inhibition efficiency of couples of compounds and to readily detect synergism. Finally, the SynAggreg platform should be suited for the characterization of a broad class of amyloids, whether of interest for drug development purposes, for fundamental research on amyloid functions, or for biotechnological applications.
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Affiliation(s)
- Hubert Aviolat
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - Yves Nominé
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - Sophie Gioria
- University of Strasbourg, Strasbourg, France; Integrative Biological Chemistry Platform of Strasbourg, Illkirch, France
| | - Anna Bonhoure
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - David Hoffmann
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - Christine Ruhlmann
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - Hélène Nierengarten
- University of Strasbourg, Strasbourg, France; Institut de Chimie de Strasbourg, UMR7177, Strasbourg, France
| | - Frank Ruffenach
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France
| | - Pascal Villa
- University of Strasbourg, Strasbourg, France; Integrative Biological Chemistry Platform of Strasbourg, Illkirch, France; Centre National de la Recherche Scientifique, UMS 3286, Illkirch, France
| | - Yvon Trottier
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France.
| | - Fabrice A C Klein
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258, Illkirch, France; University of Strasbourg, Strasbourg, France.
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27
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Ren B, Liu Y, Zhang Y, Cai Y, Gong X, Chang Y, Xu L, Zheng J. Genistein: A Dual Inhibitor of Both Amyloid β and Human Islet Amylin Peptides. ACS Chem Neurosci 2018; 9:1215-1224. [PMID: 29432676 DOI: 10.1021/acschemneuro.8b00039] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Abnormal misfolding and aggregation of amyloid peptides into amyloid fibrils are common and critical pathological events in many neurodegenerative diseases. Most inhibitors or drugs have been developed to prevent amyloid aggregation of a specific peptide, showing sequence-dependent inhibition mechanisms. It is more challenging to develop or discover inhibitors capable of preventing the aggregation of two or more different amyloid peptides. Genistein, a major phytoestrogen in soybean, has been widely used as an anti-inflammation and cerebrovascular drug due to its antioxidation and antiacetylcholinesterase effects. Herein, we examine the inhibitory effects of genistein on the aggregation of amyloid-β (Aβ, associated with Alzheimer's disease) and human islet amylin (hIAPP, associated with type 2 diabetes) and Aβ- and hIAPP-induced neurotoxicity using a combination of experimental and computational approaches. Collective experimental results from thioflavin T (ThT), atomic force microscopy (AFM), and circular dichroism (CD) demonstrate that genistein shows strong inhibition ability to prevent the conformational transition of both Aβ and hIAPP monomers to β-sheet structures, thus reducing final amyloid fibrillization from Aβ and hIAPP monomer aggregation by 40-63%. Further 3-[4,5-dimethylthiazole-2-yl]-2,5-diphenyltetrazolium bromide (MTT), lactate dehydrogenase (LDH), and large unilamellar vesicle (LUV) assays show that genistein helps to increase cell viability, decrease cell apoptosis, and reduce cell membrane leakage, where the cell protection effect of genistein is likely correlated with its reduced membrane leakage. Comparative molecular dynamics (MD) simulations reveal that genistein prefers to bind the β-sheet groove, a common structural motif of amyloid fibrils, of both Aβ and hIAPP oligomers to interfere with their self-aggregation. This work for the first time demonstrates genistein as a dual inhibitor of Aβ and hIAPP aggregation. Further structural optimization and refinement of genistein may generate a series of effective sequence-independent inhibitors against the aggregation and toxicity of different amyloid peptides.
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Affiliation(s)
- Baiping Ren
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, P. R. China
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yonglan Liu
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yanxian Zhang
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yongqing Cai
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Xiong Gong
- Department of Polymer Engineering, College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yung Chang
- R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li, Taoyuan 320, Taiwan
| | - Lijian Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Jie Zheng
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
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28
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Ribarič S. Peptides as Potential Therapeutics for Alzheimer's Disease. Molecules 2018; 23:E283. [PMID: 29385735 PMCID: PMC6017258 DOI: 10.3390/molecules23020283] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 01/26/2018] [Accepted: 01/28/2018] [Indexed: 12/22/2022] Open
Abstract
Intracellular synthesis, folding, trafficking and degradation of proteins are controlled and integrated by proteostasis. The frequency of protein misfolding disorders in the human population, e.g., in Alzheimer's disease (AD), is increasing due to the aging population. AD treatment options are limited to symptomatic interventions that at best slow-down disease progression. The key biochemical change in AD is the excessive accumulation of per-se non-toxic and soluble amyloid peptides (Aβ(1-37/44), in the intracellular and extracellular space, that alters proteostasis and triggers Aβ modification (e.g., by reactive oxygen species (ROS)) into toxic intermediate, misfolded soluble Aβ peptides, Aβ dimers and Aβ oligomers. The toxic intermediate Aβ products aggregate into progressively less toxic and less soluble protofibrils, fibrils and senile plaques. This review focuses on peptides that inhibit toxic Aβ oligomerization, Aβ aggregation into fibrils, or stabilize Aβ peptides in non-toxic oligomers, and discusses their potential for AD treatment.
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Affiliation(s)
- Samo Ribarič
- Institute of Pathophysiology, Faculty of Medicine, Zaloška 4, SI-1000 Ljubljana, Slovenia.
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29
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Ren B, Liu Y, Zhang Y, Zhang M, Sun Y, Liang G, Xu J, Zheng J. Tanshinones inhibit hIAPP aggregation, disaggregate preformed hIAPP fibrils, and protect cultured cells. J Mater Chem B 2018; 6:56-67. [DOI: 10.1039/c7tb02538f] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tanshinones act as common inhibitors to inhibit the aggregation of both hIAPP and Aβ, disaggregate preformed hIAPP and Aβ amyloid fibrils, and protect cells from hIAPP- and Aβ-induced toxicity.
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Affiliation(s)
- Baiping Ren
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices
- College of Life Science and Chemistry
- Hunan University of Technology
- Zhuzhou 412007
- P. R. China
| | - Yonglan Liu
- Department of Chemical & Biomolecular Engineering
- The University of Akron
- Ohio 44325
- USA
| | - Yanxian Zhang
- Department of Chemical & Biomolecular Engineering
- The University of Akron
- Ohio 44325
- USA
| | - Mingzhen Zhang
- Department of Chemical & Biomolecular Engineering
- The University of Akron
- Ohio 44325
- USA
| | - Yan Sun
- Department of Biochemical Engineering
- Key Laboratory of Systems Bioengineering of the Ministry of Education School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Guizhao Liang
- Key Laboratory of Biorheological Science and Technology
- Ministry of Education College
- Chongqing University
- Chongqing 400044
- China
| | - Jianxiong Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices
- College of Life Science and Chemistry
- Hunan University of Technology
- Zhuzhou 412007
- P. R. China
| | - Jie Zheng
- Department of Chemical & Biomolecular Engineering
- The University of Akron
- Ohio 44325
- USA
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30
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Hoffmann W, Folmert K, Moschner J, Huang X, von Berlepsch H, Koksch B, Bowers MT, von Helden G, Pagel K. NFGAIL Amyloid Oligomers: The Onset of Beta-Sheet Formation and the Mechanism for Fibril Formation. J Am Chem Soc 2017; 140:244-249. [PMID: 29235867 DOI: 10.1021/jacs.7b09510] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The hexapeptide NFGAIL is a highly amyloidogenic peptide, derived from the human islet amyloid polypeptide (hIAPP). Recent investigations indicate that presumably soluble hIAPP oligomers are one of the cytotoxic species in type II diabetes. Here we use thioflavin T staining, transmission electron microscopy, as well as ion mobility-mass spectrometry coupled to infrared (IR) spectroscopy to study the amyloid formation mechanism and the quaternary and secondary structure of soluble NFGAIL oligomers. Our data reveal that at neutral pH NFGAIL follows a nucleation dependent mechanism to form amyloid fibrils. During the lag phase, highly polydisperse, polymorph, and compact oligomers (oligomer number n = 2-13) as well as extended intermediates (n = 4-11) are present. IR secondary structural analysis reveals that compact conformations adopt turn-like structures, whereas extended oligomers exhibit a significant amount of β-sheet content. This agrees well with previous molecular dynamic simulations and provides direct experimental evidence that unordered off-pathway NFGAIL aggregates up to the size of at least the 13-mer as well as partially folded β-sheet containing oligomers are coexisting.
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Affiliation(s)
- Waldemar Hoffmann
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, 14195 Berlin, Germany
| | - Kristin Folmert
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany
| | - Johann Moschner
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany
| | - Xing Huang
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, 14195 Berlin, Germany
| | - Hans von Berlepsch
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany
| | - Beate Koksch
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany
| | - Michael T Bowers
- Department of Chemistry and Biochemistry, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - Gert von Helden
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, 14195 Berlin, Germany
| | - Kevin Pagel
- Freie Universität Berlin , Institute of Chemistry and Biochemistry - Organic Chemistry, Takustr. 3, 14195 Berlin, Germany
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31
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Mao Y, Yu L, Mao M, Ma C, Qu L. Design and study of lipopeptide inhibitors on preventing aggregation of human islet amyloid polypeptide residues 11-20. J Pept Sci 2017; 24. [DOI: 10.1002/psc.3058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/17/2017] [Accepted: 10/23/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Yexuan Mao
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Lanlan Yu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Mengfan Mao
- College of Chemistry; Chongqing Normal University; Chongqing 400047 China
| | - Chuanguo Ma
- National Engineering Laboratory for Wheat & Corn Further Processing; Henan University of Technology; Zhengzhou 450001 China
| | - Lingbo Qu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
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32
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Recombinant human islet amyloid polypeptide forms shorter fibrils and mediates β-cell apoptosis via generation of oxidative stress. Biochem J 2017; 474:3915-3934. [DOI: 10.1042/bcj20170323] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 02/08/2023]
Abstract
Protein misfolding and aggregation play an important role in many human diseases including Alzheimer's, Parkinson's and type 2 diabetes mellitus (T2DM). The human islet amyloid polypeptide (hIAPP) forms amyloid plaques in the pancreas of T2DM subjects (>95%) that are involved in deteriorating islet function and in mediating β-cell apoptosis. However, the detailed mechanism of action, structure and nature of toxic hIAPP species responsible for this effect remains elusive to date mainly due to the high cost associated with the chemical synthesis of pure peptide required for these studies. In the present work, we attempted to obtain structural and mechanistic insights into the hIAPP aggregation process using recombinant hIAPP (rhIAPP) isolated from Escherichia coli. Results from biophysical and structural studies indicate that the rhIAPP self-assembled into highly pure, β-sheet-rich amyloid fibrils with uniform morphology. rhIAPP-mediated apoptosis in INS-1E cells was associated with increased oxidative stress and changes in mitochondrial membrane potential. The transcript levels of apoptotic genes - Caspase-3 and Bax were found to be up-regulated, while the levels of the anti-apoptotic gene - Bcl2 were down-regulated in rhIAPP-treated cells. Additionally, the expression levels of genes involved in combating oxidative stress namely Catalase, SOD1 and GPx were down-regulated. rhIAPP exposure also affected glucose-stimulated insulin secretion from isolated pancreatic islets. The aggregation of rhIAPP also occurred significantly faster when compared with that of the chemically synthesized peptide. We also show that the rhIAPP fibrils were shorter and more cytotoxic. In summary, our study is one among the few to provide comprehensive evaluation of structural, biophysical and cytotoxic properties of rhIAPP.
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33
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Obasse I, Taylor M, Fullwood NJ, Allsop D. Development of proteolytically stable N-methylated peptide inhibitors of aggregation of the amylin peptide implicated in type 2 diabetes. Interface Focus 2017; 7:20160127. [PMID: 29147551 DOI: 10.1098/rsfs.2016.0127] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Islet amyloid polypeptide, also known as amylin, is the main component of the amyloid deposits present in approximately 90% of people with type 2 diabetes mellitus (T2DM). In this disease, amylin aggregates into multimeric β-pleated sheet structures which cause damage to pancreatic islet β-cells. Inhibitors of early-stage amylin aggregation could therefore provide a disease-modifying treatment for T2DM. In this study, overlapping peptides were designed to target the 'binding' region (RLANFLVHSS, residues 11-20) of human amylin, and their effects on amyloid fibril formation were determined by thioflavin-T assay. The first generation peptides showed less than 50% inhibition of aggregation, but a second generation peptide (H2N-RGANFLVHGR-CONH2) showed strong inhibitory effects on amylin aggregation, and this was confirmed by negative stain electron microscopy. Cytotoxicity studies revealed that this peptide protected human pancreatic 1.4E7 (ECACC 10070102) insulin-secreting cells from the toxic effects of human amylin. Unlike the retro-inverso version of this peptide, which stimulated aggregation, two N-methylated peptides (H2N-RGAmNFmLVmHGR-CONH2 and H2N-RGANmFLmVHmR-CONH2) gave very clear dose-dependent inhibition of fibril formation. These two peptides were also stable against a range of different proteolytic enzymes, and in human plasma. These N-methylated peptides could provide a novel treatment for slowing progression of T2DM.
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Affiliation(s)
- Idira Obasse
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4YQ, UK
| | - Mark Taylor
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4YQ, UK
| | - Nigel J Fullwood
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4YQ, UK
| | - David Allsop
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4YQ, UK
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Bakou M, Hille K, Kracklauer M, Spanopoulou A, Frost CV, Malideli E, Yan LM, Caporale A, Zacharias M, Kapurniotu A. Key aromatic/hydrophobic amino acids controlling a cross-amyloid peptide interaction versus amyloid self-assembly. J Biol Chem 2017; 292:14587-14602. [PMID: 28684415 DOI: 10.1074/jbc.m117.774893] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 07/02/2017] [Indexed: 12/28/2022] Open
Abstract
The interaction of the intrinsically disordered polypeptide islet amyloid polypeptide (IAPP), which is associated with type 2 diabetes (T2D), with the Alzheimer's disease amyloid-β (Aβ) peptide modulates their self-assembly into amyloid fibrils and may link the pathogeneses of these two cell-degenerative diseases. However, the molecular determinants of this interaction remain elusive. Using a systematic alanine scan approach, fluorescence spectroscopy, and other biophysical methods, including heterocomplex pulldown assays, far-UV CD spectroscopy, the thioflavin T binding assay, transmission EM, and molecular dynamics simulations, here we identified single aromatic/hydrophobic residues within the amyloid core IAPP region as hot spots or key residues of its cross-interaction with Aβ40(42) peptide. Importantly, we also find that none of these residues in isolation plays a key role in IAPP self-assembly, whereas simultaneous substitution of four aromatic/hydrophobic residues with Ala dramatically impairs both IAPP self-assembly and hetero-assembly with Aβ40(42). Furthermore, our experiments yielded several novel IAPP analogs, whose sequences are highly similar to that of IAPP but have distinct amyloid self- or cross-interaction potentials. The identified similarities and major differences controlling IAPP cross-peptide interaction with Aβ40(42) versus its amyloid self-assembly offer a molecular basis for understanding the underlying mechanisms. We propose that these insights will aid in designing intervention strategies and novel IAPP analogs for the management of type 2 diabetes, Alzheimer's disease, or other diseases related to IAPP dysfunction or cross-amyloid interactions.
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Affiliation(s)
- Maria Bakou
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Kathleen Hille
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Michael Kracklauer
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Anna Spanopoulou
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Christina V Frost
- the Physik Department, Technische Universität München, D-85748 Garching, Germany
| | - Eleni Malideli
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Li-Mei Yan
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Andrea Caporale
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
| | - Martin Zacharias
- the Physik Department, Technische Universität München, D-85748 Garching, Germany
| | - Aphrodite Kapurniotu
- From the Division of Peptide Biochemistry, Technische Universität München, D-85354 Freising, Germany and
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35
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New peptide inhibitors modulate the self-assembly of islet amyloid polypeptide residues 11–20 in vitro. Eur J Pharmacol 2017; 804:102-110. [DOI: 10.1016/j.ejphar.2017.03.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 03/09/2017] [Accepted: 03/10/2017] [Indexed: 01/24/2023]
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36
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Xu ZX, Ma GL, Zhang Q, Chen CH, He YM, Xu LH, Zhou GR, Li ZH, Yang HJ, Zhou P. Inhibitory Mechanism of Epigallocatechin Gallate on Fibrillation and Aggregation of Amidated Human Islet Amyloid Polypeptide. Chemphyschem 2017; 18:1611-1619. [PMID: 28297133 DOI: 10.1002/cphc.201700057] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Indexed: 01/06/2023]
Abstract
The abnormal fibrillation of human islet amyloid polypeptide (hIAPP) is associated with development of type II diabetes mellitus (T2DM). (-)-Epigallocatechin gallate (EGCG) can bind amyloid proteins to inhibit the fibrillation of these proteins. However, the mechanic detail of EGCG inhibiting amyloid formation is still unclear at the molecular level. In the present work, we sought to investigate the effect of EGCG on amidated hIAPP (hIAPP-NH2 ) fibrillation and aggregation by using spectroscopic and microscopic techniques, and also sought to gain insights into the interaction of EGCG and hIAPP22-27 by using spectroscopic experiments and quantum chemical calculations. ThT fluorescence, real-time NMR, and TEM studies demonstrated that EGCG inhibits the formation of hIAPP-NH2 fibrils, while promoting the formation of hIAPP-NH2 amorphous aggregates. Phenylalanine intrinsic fluorescence and NMR studies of the EGCG/hIAPP22-27 complex revealed three important binding sites including the A ring of EGCG, residue Phe23, and residue Ile26. DFT calculations identified the dominant binding structures of EGCG/Phe23 and EGCG/Ile26 complexes, named structure I and structure II, respectively. Our study demonstrates the inhibitory mechanism of EGCG on fibrillation and aggregation of hIAPP-NH2 in which EGCG interacts with hIAPP-NH2 through hydrogen bonding and π-π interactions between the A ring and residue Phe23 as well as hydrophobic interactions between the A ring and residue Ile26, which can thus inhibit the interpeptide interaction between hIAPP-NH2 monomers and finally inhibit fibrillation of hIAPP-NH2 . This study agrees with and reinforces previous studies and offers an intuitive explanation at both the atomic and molecular levels. Our findings may provide an invaluable reference for the future development of new drugs in the management of diabetes.
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Affiliation(s)
- Zhi-Xue Xu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China), Fax: (+86) 21-55664038
| | - Gong-Li Ma
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Qiang Zhang
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, P. R. China
| | - Cong-Heng Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China), Fax: (+86) 21-55664038
| | - Yan-Ming He
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, P. R. China
| | - Li-Hui Xu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China), Fax: (+86) 21-55664038
| | - Guang-Rong Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China), Fax: (+86) 21-55664038
| | - Zhen-Hua Li
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Hong-Jie Yang
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, P. R. China
| | - Ping Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China), Fax: (+86) 21-55664038
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37
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Zhou S, Wang Q, Ren M, Zhang A, Liu H, Yao X. Molecular dynamics simulation on the inhibition mechanism of peptide-based inhibitor of islet amyloid polypeptide (IAPP) to islet amyloid polypeptide (IAPP22-28) oligomers. Chem Biol Drug Des 2017; 90:31-39. [DOI: 10.1111/cbdd.12924] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 11/18/2016] [Accepted: 11/27/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Shuangyan Zhou
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou China
- School of Pharmacy; Lanzhou University; Lanzhou China
| | - Qianqian Wang
- State Key Laboratory of Quality Research in Chinese Medicine; Macau Institute for Applied Research in Medicine and Health; Macau University of Science and Technology; Taipa Macau China
| | - Mengdan Ren
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou China
| | - Ai Zhang
- School of Pharmacy; Lanzhou University; Lanzhou China
| | - Huanxiang Liu
- School of Pharmacy; Lanzhou University; Lanzhou China
| | - Xiaojun Yao
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou China
- State Key Laboratory of Quality Research in Chinese Medicine; Macau Institute for Applied Research in Medicine and Health; Macau University of Science and Technology; Taipa Macau China
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38
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Sarnowski MP, Kang CW, Elbatrawi YM, Wojtas L, Del Valle JR. Peptide N-Amination Supports β-Sheet Conformations. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Matthew P. Sarnowski
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Chang Won Kang
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Yassin M. Elbatrawi
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Juan R. Del Valle
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
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Sarnowski MP, Kang CW, Elbatrawi YM, Wojtas L, Del Valle JR. Peptide N-Amination Supports β-Sheet Conformations. Angew Chem Int Ed Engl 2017; 56:2083-2086. [DOI: 10.1002/anie.201609395] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 12/12/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Matthew P. Sarnowski
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Chang Won Kang
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Yassin M. Elbatrawi
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Juan R. Del Valle
- Department of Chemistry; University of South Florida; 4202 E. Fowler Avenue Tampa FL 33620 USA
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40
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Disaggregation of Amylin Aggregate by Novel Conformationally Restricted Aminobenzoic Acid containing α/β and α/γ Hybrid Peptidomimetics. Sci Rep 2017; 7:40095. [PMID: 28054630 PMCID: PMC5214534 DOI: 10.1038/srep40095] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 12/01/2016] [Indexed: 11/24/2022] Open
Abstract
Diabetes has emerged as a threat to the current world. More than ninety five per cent of all the diabetic population has type 2 diabetes mellitus (T2DM). Aggregates of Amylin hormone, which is co-secreted with insulin from the pancreatic β-cells, inhibit the activities of insulin and glucagon and cause T2DM. Importance of the conformationally restricted peptides for drug design against T2DM has been invigorated by recent FDA approval of Symlin, which is a large conformationally restricted peptide. However, Symlin still has some issues including solubility, oral bioavailability and cost of preparation. Herein, we introduced a novel strategy for conformationally restricted peptide design adopting a minimalistic approach for cost reduction. We have demonstrated efficient inhibition of amyloid formation of Amylin and its disruption by a novel class of conformationally restricted β-sheet breaker hybrid peptidomimetics (BSBHps). We have inserted β, γ and δ -aminobenzoic acid separately into an amyloidogenic peptide sequence, synthesized α/β, α/γ and α/δ hybrid peptidomimetics, respectively. Interestingly, we observed the aggregation inhibitory efficacy of α/β and α/γ BSBHps, but not of α/δ analogues. They also disrupt existing amyloids into non-toxic forms. Results may be useful for newer drug design against T2DM as well as other amyloidoses and understanding amyloidogenesis.
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41
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Receptor-mediated toxicity of human amylin fragment aggregated by short- and long-term incubations with copper ions. Mol Cell Biochem 2016; 425:85-93. [PMID: 27804051 DOI: 10.1007/s11010-016-2864-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/22/2016] [Indexed: 12/29/2022]
Abstract
Human amylin (hA1-37) is a polypeptide hormone secreted in conjunction with insulin from the pancreatic β-cells involved in the pathogenesis of type 2 diabetes mellitus (T2DM). The shorter fragment hA17-29 than full-length peptide is capable to form amyloids "in vitro". Here, we monitored the time course of hA17-29 β-amyloid fibril and oligomer formation [without and with copper(II)], cellular toxicity of different amyloid aggregates, and involvement of specific receptors (receptor for advanced glycation end-products, RAGE; low-affinity nerve growth factor receptor, p75-NGFR) in aggregate toxicity. Fibril and oligomer formation of hA17-29 incubated at 37 °C for 0, 48, and 120 h, without or with copper(II), were measured by the thioflavin T fluorescence assay and ELISA, respectively. Toxicity of hA17-29 aggregates and effects of anti-RAGE and anti-p75-NGFR antibodies were evaluated on neuroblastoma SH-SY5Y viability. Fluorescence assay of hA17-29 indicates an initial slow rate of soluble fibril formation (48 h), followed by a slower rate of insoluble aggregate formation (120 h). The highest quantity of oligomers was recorded when hA17-29 was pre-aggregated for 48 h in the presence of copper(II) showing also the maximal cell toxicity (-44% of cell viability, p < 0.01 compared to controls). Anti-RAGE or anti-p75-NGFR antibodies almost abolished cell toxicity of hA17-29 aggregates. These results indicate that copper(II) influences the aggregation process and hA17-29 toxicities are especially attributable to oligomeric aggregates. hA17-29 aggregate toxicity seems to be mediated by RAGE and p75-NGFR receptors which might be potential targets for new drugs in T2DM treatment.
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42
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Sivanesam K, Shu I, Huggins KNL, Tatarek-Nossol M, Kapurniotu A, Andersen NH. Peptide Inhibitors of the amyloidogenesis of IAPP: verification of the hairpin-binding geometry hypothesis. FEBS Lett 2016; 590:2575-83. [PMID: 27317951 DOI: 10.1002/1873-3468.12261] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 06/10/2016] [Accepted: 06/13/2016] [Indexed: 02/06/2023]
Abstract
Versions of a previously discovered β-hairpin peptide inhibitor of IAPP aggregation that are stabilized in that conformation, or even forced to remain in the hairpin conformation by a backbone cyclization constraint, display superior activity as inhibitors. The cyclized hairpin, cyclo-WW2, displays inhibitory activity at substoichiometric concentrations relative to this amyloidogenic peptide. The hairpin-binding hypothesis stands confirmed.
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Affiliation(s)
| | - Irene Shu
- Department of Chemistry, University of Washington, Seattle, WA, USA
| | | | | | - Aphrodite Kapurniotu
- Division of Peptide Biochemistry, Technische Universität München, Freising, Germany
| | - Niels H Andersen
- Department of Chemistry, University of Washington, Seattle, WA, USA
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43
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Nedumpully-Govindan P, Gurzov EN, Chen P, Pilkington EH, Stanley WJ, Litwak SA, Davis TP, Ke PC, Ding F. Graphene oxide inhibits hIAPP amyloid fibrillation and toxicity in insulin-producing NIT-1 cells. Phys Chem Chem Phys 2016; 18:94-100. [PMID: 26625841 PMCID: PMC4684718 DOI: 10.1039/c5cp05924k] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Human islet amyloid polypeptide (hIAPP or amylin) aggregation is directly associated with pancreatic β-cell death and subsequent insulin deficiency in type 2 diabetes (T2D). Since no cure is currently available for T2D, it is of great benefit to devise new anti-aggregation molecules, which protect β-cells against hIAPP aggregation-induced toxicity. Engineered nanoparticles have been recently exploited as anti-aggregation nanomedicines. In this work, we studied graphene oxide (GO) nanosheets for their potential for hIAPP aggregation inhibition by combining computational modeling, biophysical characterization and cell toxicity measurements. Using discrete molecular dynamics (DMD) simulations and in vitro studies, we showed that GO exhibited an inhibitory effect on hIAPP aggregation. DMD simulations indicated that the strong binding of hIAPP to GO nanosheets was driven by hydrogen bonding and aromatic stacking and that the strong peptide-GO binding efficiently inhibited hIAPP self-association and aggregation on the nanosheet surface. Secondary structural changes of hIAPP upon GO binding derived from DMD simulations were consistent with circular dichroism (CD) spectroscopy measurements. Transmission electron microscopy (TEM) images confirmed the reduction of hIAPP aggregation in the presence of GO. Furthermore, we carried out a cell toxicity assay and found that these nanosheets protected insulin-secreting NIT-1 pancreatic β-cells against hIAPP-induced toxicity. Our multidisciplinary study suggests that GO nanosheets have the potential to be utilized as an anti-aggregation nanomedicine itself in addition to a biosensor or delivery vehicle for the mitigation of T2D progression.
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Affiliation(s)
| | - Esteban N. Gurzov
- St Vincent’s Institute of Medical Research, 9 Princes Street, Fitzroy, VIC 3065, Australia
- Department of Medicine, St. Vincent’s Hospital, The University of Melbourne, Melbourne, Australia
| | - Pengyu Chen
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 28109, USA
| | - Emily H. Pilkington
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - William J. Stanley
- St Vincent’s Institute of Medical Research, 9 Princes Street, Fitzroy, VIC 3065, Australia
- Department of Medicine, St. Vincent’s Hospital, The University of Melbourne, Melbourne, Australia
| | - Sara A. Litwak
- St Vincent’s Institute of Medical Research, 9 Princes Street, Fitzroy, VIC 3065, Australia
| | - Thomas P. Davis
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
- Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, United Kingdom
| | - Pu Chun Ke
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Feng Ding
- Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA
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44
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Zhang B, Zhu D, Wang W, Gong G, Du W. Influence of oxodiperoxovanadate complexes on prion neuropeptide fibril formation. RSC Adv 2016. [DOI: 10.1039/c5ra25849a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Different oxodiperoxovanadate complexes inhibit the fibril formation of prion neuropeptides by different action modes.
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Affiliation(s)
- Baohong Zhang
- Department of Chemistry
- Renmin University of China
- Beijing
- China
- College of Materials Science and Engineering
| | - Dengsen Zhu
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Wenji Wang
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Gehui Gong
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Weihong Du
- Department of Chemistry
- Renmin University of China
- Beijing
- China
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45
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Wang L, Zhu S, Lu T, Zhang G, Xu J, Song Y, Li Y, Wang L, Yang B, Li F. The effects of a series of carbon dots on fibrillation and cytotoxicity of human islet amyloid polypeptide. J Mater Chem B 2016; 4:4913-4921. [DOI: 10.1039/c6tb00921b] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Carbon dots can change hIAPP aggregation kinetics and have a potential to reduce the cytotoxicity of the polypeptide.
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Affiliation(s)
- Li Wang
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Shoujun Zhu
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Tong Lu
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Guangji Zhang
- College of Life Science
- Jilin University
- Changchun 130012
- P. R. China
| | - Jia Xu
- College of Life Science
- Jilin University
- Changchun 130012
- P. R. China
| | - Yubin Song
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Yang Li
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Liping Wang
- College of Life Science
- Jilin University
- Changchun 130012
- P. R. China
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Fei Li
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
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46
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Ghosh A, Ho JJ, Serrano AL, Skoff DR, Zhang T, Zanni MT. Two-dimensional sum-frequency generation (2D SFG) spectroscopy: summary of principles and its application to amyloid fiber monolayers. Faraday Discuss 2015; 177:493-505. [PMID: 25611039 DOI: 10.1039/c4fd00173g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
By adding a mid-infrared pulse shaper to a sum-frequency generation (SFG) spectrometer, we have built a 2D SFG spectrometer capable of measuring spectra analogous to 2D IR spectra but with monolayer sensitivity and SFG selection rules. In this paper, we describe the experimental apparatus and provide an introduction to 2D SFG spectroscopy to help the reader interpret 2D SFG spectra. The main aim of this manuscript is to report 2D SFG spectra of the amyloid forming peptide FGAIL. FGAIL is a critical segment of the human islet amyloid polypeptide (hIAPP or amylin) that aggregates in people with type 2 diabetes. FGAIL is catalyzed into amyloid fibers by many types of surfaces. Here, we study the structure of FGAIL upon deposition onto a gold surface covered with a self-assembled monolayer of methyl-4-mercaptobenzoate (MMB) that produces an ester coating. FGAIL deposited on bare gold does not form ordered layers. The measured 2D SFG spectrum is consistent with amyloid fiber formation, exhibiting both the parallel (a+) and perpendicular (a-) symmetry modes associated with amyloid β-sheets. Cross peaks are observed between the ester stretches of the coating and the FGAIL peptides. Simulations are presented for two possible structures of FGAIL amyloid β-sheets that illustrate the sensitivity of the 2D SFG spectra to structure and orientation. These results provide some of the first molecular insights into surface catalyzed amyloid fiber structure.
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Affiliation(s)
- Ayanjeet Ghosh
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA.
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47
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Lopes DHJ, Attar A, Nair G, Hayden EY, Du Z, McDaniel K, Dutt S, Bandmann H, Bravo-Rodriguez K, Mittal S, Klärner FG, Wang C, Sanchez-Garcia E, Schrader T, Bitan G. Molecular tweezers inhibit islet amyloid polypeptide assembly and toxicity by a new mechanism. ACS Chem Biol 2015; 10:1555-69. [PMID: 25844890 DOI: 10.1021/acschembio.5b00146] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In type-2 diabetes (T2D), islet amyloid polypeptide (IAPP) self-associates into toxic assemblies causing islet β-cell death. Therefore, preventing IAPP toxicity is a promising therapeutic strategy for T2D. The molecular tweezer CLR01 is a supramolecular tool for selective complexation of K residues in (poly)peptides. Surprisingly, it inhibits IAPP aggregation at substoichiometric concentrations even though IAPP has only one K residue at position 1, whereas efficient inhibition of IAPP toxicity requires excess CLR01. The basis for this peculiar behavior is not clear. Here, a combination of biochemical, biophysical, spectroscopic, and computational methods reveals a detailed mechanistic picture of the unique dual inhibition mechanism for CLR01. At low concentrations, CLR01 binds to K1, presumably nucleating nonamyloidogenic, yet toxic, structures, whereas excess CLR01 binds also to R11, leading to nontoxic structures. Encouragingly, the CLR01 concentrations needed for inhibition of IAPP toxicity are safe in vivo, supporting its development toward disease-modifying therapy for T2D.
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Affiliation(s)
| | | | | | | | - Zhenming Du
- Department of Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | | | - Som Dutt
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | - Heinz Bandmann
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | | | - Sumit Mittal
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim an der Ruhr, Germany
| | - Frank-Gerrit Klärner
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | - Chunyu Wang
- Department of Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | | | - Thomas Schrader
- Institute of Organic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
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48
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Ghosh A, Pithadia AS, Bhat J, Bera S, Midya A, Fierke CA, Ramamoorthy A, Bhunia A. Self-assembly of a nine-residue amyloid-forming peptide fragment of SARS corona virus E-protein: mechanism of self aggregation and amyloid-inhibition of hIAPP. Biochemistry 2015; 54:2249-2261. [PMID: 25785896 DOI: 10.1021/acs.biochem.5b00061] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular self-assembly, a phenomenon widely observed in nature, has been exploited through organic molecules, proteins, DNA, and peptides to study complex biological systems. These self-assembly systems may also be used in understanding the molecular and structural biology which can inspire the design and synthesis of increasingly complex biomaterials. Specifically, use of these building blocks to investigate protein folding and misfolding has been of particular value since it can provide tremendous insights into peptide aggregation related to a variety of protein misfolding diseases, or amyloid diseases (e.g., Alzheimer's disease, Parkinson's disease, type-II diabetes). Herein, the self-assembly of TK9, a nine-residue peptide of the extra membrane C-terminal tail of the SARS corona virus envelope, and its variants were characterized through biophysical, spectroscopic, and simulated studies, and it was confirmed that the structure of these peptides influences their aggregation propensity, hence, mimicking amyloid proteins. TK9, which forms a beta-sheet rich fibril, contains a key sequence motif that may be critical for beta-sheet formation, thus making it an interesting system to study amyloid fibrillation. TK9 aggregates were further examined through simulations to evaluate the possible intra- and interpeptide interactions at the molecular level. These self-assembly peptides can also serve as amyloid inhibitors through hydrophobic and electrophilic recognition interactions. Our results show that TK9 inhibits the fibrillation of hIAPP, a 37 amino acid peptide implicated in the pathology of type-II diabetes. Thus, biophysical and NMR experimental results have revealed a molecular level understanding of peptide folding events, as well as the inhibition of amyloid-protein aggregation are reported.
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Affiliation(s)
- Anirban Ghosh
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India
| | - Amit S Pithadia
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
| | - Jyotsna Bhat
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India
| | - Supriyo Bera
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India
| | - Anupam Midya
- School of Nanoscience and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Carol A Fierke
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA.,Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA.,Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ayyalusamy Ramamoorthy
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA.,Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India.,Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA.,Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
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49
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Smaoui MR, Orland H, Waldispühl J. Probing the binding affinity of amyloids to reduce toxicity of oligomers in diabetes. Bioinformatics 2015; 31:2294-302. [PMID: 25777526 DOI: 10.1093/bioinformatics/btv143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 03/08/2015] [Indexed: 11/13/2022] Open
Abstract
MOTIVATION Amyloids play a role in the degradation of β-cells in diabetes patients. In particular, short amyloid oligomers inject themselves into the membranes of these cells and create pores that disrupt the strictly controlled flow of ions through the membranes. This leads to cell death. Getting rid of the short oligomers either by a deconstruction process or by elongating them into longer fibrils will reduce this toxicity and allow the β-cells to live longer. RESULTS We develop a computational method to probe the binding affinity of amyloid structures and produce an amylin analog that binds to oligomers and extends their length. The binding and extension lower toxicity and β-cell death. The amylin analog is designed through a parsimonious selection of mutations and is to be administered with the pramlintide drug, but not to interact with it. The mutations (T9K L12K S28H T30K) produce a stable native structure, strong binding affinity to oligomers, and long fibrils. We present an extended mathematical model for the insulin-glucose relationship and demonstrate how affecting the concentration of oligomers with such analog is strictly coupled with insulin release and β-cell fitness. AVAILABILITY AND IMPLEMENTATION SEMBA, the tool to probe the binding affinity of amyloid proteins and generate the binding affinity scoring matrices and R-scores is available at: http://amyloid.cs.mcgill.ca
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Affiliation(s)
- Mohamed Raef Smaoui
- School of Computer Science and McGill Center for Bioinformatics, McGill University, Montreal, QC, Canada and
| | - Henri Orland
- Institut de Physique Théorique, CEA-Saclay, 91191 Gif/Yvette Cedex, France
| | - Jérôme Waldispühl
- School of Computer Science and McGill Center for Bioinformatics, McGill University, Montreal, QC, Canada and
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50
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Md. Abdur Rauf S, Arvidsson PI, Albericio F, Govender T, Maguire GEM, Kruger HG, Honarparvar B. The effect of N-methylation of amino acids (Ac-X-OMe) on solubility and conformation: a DFT study. Org Biomol Chem 2015; 13:9993-10006. [DOI: 10.1039/c5ob01565k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
N-Methylation of amino acid derivatives (Ac-X-OMe, X = Gly, Val, Leu, Ile, Phe, Met, Cys, Ser, Asp and His) leads to an increase in aqueous solubility, lipophilicity and lowering of the cis/trans amide conformational energy barrier (EA).
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Affiliation(s)
- Shah Md. Abdur Rauf
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Per I. Arvidsson
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Fernando Albericio
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Thavendran Govender
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Glenn E. M. Maguire
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Hendrik G. Kruger
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Bahareh Honarparvar
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
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