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Berner F, Kovermann M. Including the Ensemble of Unstructured Conformations in the Analysis of Protein's Native State by High-Pressure NMR Spectroscopy. Angew Chem Int Ed Engl 2024; 63:e202401343. [PMID: 38656763 DOI: 10.1002/anie.202401343] [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: 01/19/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/26/2024]
Abstract
The analysis of pressure induced changes in the chemical shift of proteins allows statements on structural fluctuations proteins exhibit at ambient pressure. The inherent issue of separating general pressure effects from structural related effects on the pressure dependence of chemical shifts has so far been addressed by considering the characteristics of random coil peptides on increasing pressure. In this work, chemically and pressure denatured states of the cold shock protein B from Bacillus subtilis (BsCspB) have been assigned in 2D 1H-15N HSQC NMR spectra and their dependence on increasing hydrostatic pressure has been evaluated. The pressure denatured polypeptide chain has been used to separate general from structural related effects on 1H and 15N chemical shifts of native BsCspB and the implications on the interpretation of pressure induced changes in the chemical shift regarding the structure of BsCspB are discussed. It has been found that the ensemble of unstructured conformations of BsCspB shows different responses to increasing pressure than random coil peptides do. Thus, the approach used for considering the general effects that arise when hydrostatic pressure increases changes the structural conclusions that are drawn from high pressure NMR spectroscopic experiments that rely on the analysis of chemical shifts.
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Affiliation(s)
- Frederic Berner
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78464, Konstanz, Germany
| | - Michael Kovermann
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78464, Konstanz, Germany
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2
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Meleleo D, Cibelli G, Valenzano A, Mastrodonato M, Mallamaci R. The Effect of Calcium Ions on hIAPP Channel Activity: Possible Implications in T2DM. MEMBRANES 2023; 13:878. [PMID: 37999364 PMCID: PMC10673357 DOI: 10.3390/membranes13110878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023]
Abstract
The calcium ion (Ca2+) has been linked to type 2 diabetes mellitus (T2DM), although the role of Ca2+ in this disorder is the subject of intense investigation. Serum Ca2+ dyshomeostasis is associated with the development of insulin resistance, reduced insulin sensitivity, and impaired glucose tolerance. However, the molecular mechanisms involving Ca2+ ions in pancreatic β-cell loss and subsequently in T2DM remain poorly understood. Implicated in the decline in β-cell functions are aggregates of human islet amyloid polypeptide (hIAPP), a small peptide secreted by β-cells that shows a strong tendency to self-aggregate into β-sheet-rich aggregates that evolve toward the formation of amyloid deposits and mature fibrils. The soluble oligomers of hIAPP can permeabilize the cell membrane by interacting with bilayer lipids. Our study aimed to evaluate the effect of Ca2+ on the ability of the peptide to incorporate and form ion channels in zwitterionic planar lipid membranes (PLMs) composed of palmitoyl-oleoyl-phosphatidylcholine (POPC) and on the aggregation process of hIAPP molecules in solution. Our results may help to clarify the link between Ca2+ ions, hIAPP peptide, and consequently the pathophysiology of T2DM.
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Affiliation(s)
- Daniela Meleleo
- Department of Science of Agriculture, Food, Natural Resources and Engineering, University of Foggia, 71122 Foggia, Italy
| | - Giuseppe Cibelli
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (G.C.); (A.V.)
| | - Anna Valenzano
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (G.C.); (A.V.)
| | - Maria Mastrodonato
- Department of Biosciences, Biotechnologies and Environment, University of Bari “Aldo Moro”, 70125 Bari, Italy; (M.M.); (R.M.)
| | - Rosanna Mallamaci
- Department of Biosciences, Biotechnologies and Environment, University of Bari “Aldo Moro”, 70125 Bari, Italy; (M.M.); (R.M.)
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3
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Roy D, Maity NC, Kumar S, Maity A, Ratha BN, Biswas R, Maiti NC, Mandal AK, Bhunia A. Modulatory role of copper on hIAPP aggregation and toxicity in presence of insulin. Int J Biol Macromol 2023; 241:124470. [PMID: 37088193 DOI: 10.1016/j.ijbiomac.2023.124470] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/24/2023] [Accepted: 04/12/2023] [Indexed: 04/25/2023]
Abstract
Aggregation of the human islets amyloid polypeptide, or hIAPP, is linked to β-cell death in type II diabetes mellitus (T2DM). Different pancreatic β-cell environmental variables such as pH, insulin and metal ions play a key role in controlling the hIAPP aggregation. Since insulin and hIAPP are co-secreted, it is known from numerous studies that insulin suppresses hIAPP fibrillation by preventing the initial dimerization process. On the other hand, zinc and copper each have an inhibitory impact on hIAPP fibrillation, but copper promotes the production of toxic oligomers. Interestingly, the insulin oligomeric equilibrium is controlled by the concentration of zinc ions when the effect of insulin and zinc has been tested together. Lower zinc concentrations cause the equilibrium to shift towards the monomer and dimer states of insulin, which bind to monomeric hIAPP and stop it from developing into a fibril. On the other hand, the combined effects of copper and insulin have not yet been done. In this study, we have demonstrated how the presence of copper affects hIAPP aggregation and the toxicity of the resultant conformers with or without insulin. For this purpose, we have used a set of biophysical techniques, including NMR, fluorescence, CD etc., in combination with AFM and cell cytotoxicity assay. In the presence and/or absence of insulin, copper induces hIAPP to form structurally distinct stable toxic oligomers, deterring the fibrillation process. More specifically, the oligomers generated in the presence of insulin have slightly higher toxicity than those formed in the absence of insulin. This research will increase our understanding of the combined modulatory effect of two β-cell environmental factors on hIAPP aggregation.
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Affiliation(s)
- Dipanwita Roy
- Department of Biophysics, Bose Institute, Unified Academic Campus, Salt Lake, Sctor V, Kolkata 700091, India
| | - Narayan Chandra Maity
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Sector-III, Salt Lake, Kolkata 700106, India
| | - Sourav Kumar
- Department of Biophysics, Bose Institute, Unified Academic Campus, Salt Lake, Sctor V, Kolkata 700091, India
| | - Anupam Maity
- Structural Biology and Bioinformatics, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Bhisma N Ratha
- Department of Biophysics, Bose Institute, Unified Academic Campus, Salt Lake, Sctor V, Kolkata 700091, India
| | - Ranjit Biswas
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Sector-III, Salt Lake, Kolkata 700106, India
| | - Nakul Chandra Maiti
- Structural Biology and Bioinformatics, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Atin Kumar Mandal
- Division of Molecular Medicine, Bose Institute, Unified Academic Campus, Salt Lake, Sctor V, Kolkata, 700091, India
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, Unified Academic Campus, Salt Lake, Sctor V, Kolkata 700091, India.
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4
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Evidence of the different effect of mercury and cadmium on the hIAPP aggregation process. Biophys Chem 2022; 290:106880. [DOI: 10.1016/j.bpc.2022.106880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/26/2022] [Accepted: 08/26/2022] [Indexed: 11/22/2022]
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5
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Dicke SS, Maj M, Fields CR, Zanni MT. Metastable intermediate during hIAPP aggregation catalyzed by membranes as detected with 2D IR spectroscopy. RSC Chem Biol 2022; 3:931-940. [PMID: 35866164 PMCID: PMC9257649 DOI: 10.1039/d2cb00028h] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 05/24/2022] [Indexed: 11/26/2022] Open
Abstract
The aggregation of human islet amyloid polypeptide (hIAPP) into amyloid fibrils involves formation of oligomeric intermediates that are thought to be the cytotoxic species responsible for β-cell dysfunction in type 2 diabetes. hIAPP oligomers permeating or disrupting the cellular membrane may be one mechanism of toxicity and so measuring the structural kinetics of aggregation in the presence of membranes is of much interest. In this study, we use 2D IR spectroscopy and 13C18O isotope labeling to study the secondary structure of the oligomeric intermediates formed in solution and in the presence of phospholipid vesicles at sites L12A13, L16V17, G24A25 and V32G33. Pairs of labels monitor the couplings between associated polypeptides and the dihedral angles between adjacent residues. In solution, the L12A13 residues form an oligomeric β-sheet in addition to an α-helix whereas with the phospholipid vesicles they are α-helical throughout the aggregation process. In both solution and with DOPC vesicles, L16V17 and V32G33 have disordered structures until fibrils are formed. Similarly, under both conditions, G24A25 exhibits 3-state kinetics, created by an oligomeric intermediate with a well-defined β-sheet structure. Amyloid fibril formation is often thought to involve intermediates with exceedingly low populations that are difficult to detect experimentally. These experiments establish that amyloid fibril formation of hIAPP when catalyzed by membranes includes a metastable intermediate and that this intermediate has a similar structure at G24A25 in the FGAIL region as the corresponding intermediate in solution, thought to be the toxic species. 2D IR and 13C18O isotope labeling establish that amyloid formation of hIAPP catalyzed by membranes includes a metastable intermediate with a similar structure at G24A25 in the FGAIL region as the corresponding intermediate in solution.![]()
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Affiliation(s)
- Sidney S Dicke
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
| | - Michał Maj
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA .,Formally at Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
| | - Caitlyn R Fields
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
| | - Martin T Zanni
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
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Tang Y, Zhang D, Gong X, Zheng J. A mechanistic survey of Alzheimer's disease. Biophys Chem 2021; 281:106735. [PMID: 34894476 DOI: 10.1016/j.bpc.2021.106735] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 02/06/2023]
Abstract
Alzheimer's disease (AD) is the most common, age-dependent neurodegenerative disorder. While AD has been intensively studied from different aspects, there is no effective cure for AD, largely due to a lack of a clear mechanistic understanding of AD. In this mini-review, we mainly focus on the discussion and summary of mechanistic causes of Alzheimer's disease (AD). While different AD mechanisms illustrate different molecular and cellular pathways in AD pathogenesis, they do not necessarily exclude each other. Instead, some of them could work together to initiate, trigger, and promote the onset and development of AD. In a broader viewpoint, some AD mechanisms (e.g., amyloid aggregation mechanism, microbial infection/neuroinflammation mechanism, and amyloid cross-seeding mechanism) could also be applicable to other amyloid diseases including type II diabetes, Parkinson's disease, and prion disease. Such common mechanisms for AD and other amyloid diseases explain not only the pathogenesis of individual amyloid diseases, but also the spreading of pathologies between these diseases, which will inspire new strategies for therapeutic intervention and prevention for AD.
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Affiliation(s)
- Yijing Tang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, OH, United States of America
| | - Dong Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, OH, United States of America
| | - Xiong Gong
- Department of Polymer Engineering, The University of Akron, OH, United States of America
| | - Jie Zheng
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, OH, United States of America.
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7
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The thermodynamic and kinetic mechanisms of a Ganoderma lucidum proteoglycan inhibiting hIAPP amyloidosis. Biophys Chem 2021; 280:106702. [PMID: 34741991 DOI: 10.1016/j.bpc.2021.106702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 10/17/2021] [Accepted: 10/26/2021] [Indexed: 12/14/2022]
Abstract
Ganoderma lucidum is a valuable medicinal herbal which has been reported to prevent type 2 diabetes (T2D). A natural hyperbranched proteoglycan extracted from Ganoderma lucidum, namely, FYGL, has been demonstrated to inhibit the amyloidosis of human islet amyloid polypeptide (hIAPP) previously by our lab. However, the effective active components and the mechanisms of FYGL in inhibiting hIAPP amyloidosis are unknown. To identify the effective active components, different components from FYGL were isolated: the polysaccharide FYGL-1, the proteoglycans of FYGL-2 and FYGL-3. We further separated and sequenced the protein moieties of FYGL-2 and FYGL-3, namely, FYGL-2-P and FYGL-3-P, respectively, and compared their abilities to inhibit hIAPP amyloidosis, and systematically explored the inhibitory mechanisms by spectroscopy, microscopy and molecular dynamic simulation methods. Results showed that the protein moieties of FYGL played essential roles in inhibiting hIAPP amyloidosis. The strong, specific, and enthalpy-driven interaction by π-π stacking and electrostatic forces between hIAPP and FYGL-3-P dramatically inhibited hIAPP amyloidosis. These results suggested that FYGL-3-P had enormous potential to prevent hIAPP misfolding-induced diabetes and structurally helped researchers to seek or design inhibitors against polypeptide amyloidosis.
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Vemulapalli SB, Becker S, Griesinger C, Rezaei-Ghaleh N. Combined High-Pressure and Multiquantum NMR and Molecular Simulation Propose a Role for N-Terminal Salt Bridges in Amyloid-Beta. J Phys Chem Lett 2021; 12:9933-9939. [PMID: 34617758 PMCID: PMC8521524 DOI: 10.1021/acs.jpclett.1c02595] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Several lines of evidence point to the important role of the N-terminal region of amyloid-beta (Aβ) peptide in its toxic aggregation in Alzheimer's disease (AD). It is known that charge-altering modifications such as Ser8 phosphorylation promote Aβ fibrillar aggregation. In this Letter, we combine high-pressure NMR, multiquantum chemical exchange saturation transfer (MQ-CEST) NMR, and microseconds-long molecular dynamics simulation and provide evidence of the presence of several salt bridges between Arg5 and its nearby negatively charged residues, in particular, Asp7 and Glu3. The presence of these salt bridges is correlated with less extended structures in the N-terminal region of Aβ. Through density functional theory calculations, we demonstrate how the introduction of negatively charged phosphoserine 8 influences the network of adjacent salt bridges in Aβ and favors more extended N-terminal structures. Our data propose a structural mechanism for the Ser8-phosphorylation-promoted Aβ aggregation and define the N-terminal salt bridges as potential targets for anti-AD drug design.
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Affiliation(s)
- Sahithya
Phani Babu Vemulapalli
- Department
of NMR-based Structural Biology, Max Planck
Institute for Biophysical Chemistry, Göttingen 37077, Germany
- Institute
for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg 26129, Germany
| | - Stefan Becker
- Department
of NMR-based Structural Biology, Max Planck
Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Christian Griesinger
- Department
of NMR-based Structural Biology, Max Planck
Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Nasrollah Rezaei-Ghaleh
- Department
of NMR-based Structural Biology, Max Planck
Institute for Biophysical Chemistry, Göttingen 37077, Germany
- Department
of Neurology, University Medical Center
Göttingen, Göttingen 37075, Germany
- Institute
for Physical Biology, Heinrich Heine University, Düsseldorf 40225, Germany
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9
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Argudo PG, Giner-Casares JJ. Folding and self-assembly of short intrinsically disordered peptides and protein regions. NANOSCALE ADVANCES 2021; 3:1789-1812. [PMID: 36133101 PMCID: PMC9417027 DOI: 10.1039/d0na00941e] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/17/2021] [Indexed: 05/15/2023]
Abstract
Proteins and peptide fragments are highly relevant building blocks in self-assembly for nanostructures with plenty of applications. Intrinsically disordered proteins (IDPs) and protein regions (IDRs) are defined by the absence of a well-defined secondary structure, yet IDPs/IDRs show a significant biological activity. Experimental techniques and computational modelling procedures for the characterization of IDPs/IDRs are discussed. Directed self-assembly of IDPs/IDRs allows reaching a large variety of nanostructures. Hybrid materials based on the derivatives of IDPs/IDRs show a promising performance as alternative biocides and nanodrugs. Cell mimicking, in vivo compartmentalization, and bone regeneration are demonstrated for IDPs/IDRs in biotechnological applications. The exciting possibilities of IDPs/IDRs in nanotechnology with relevant biological applications are shown.
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Affiliation(s)
- Pablo G Argudo
- Université de Bordeaux, CNRS, Bordeaux INP, LCPO 16 Avenue Pey-Berland 33600 Pessac France
| | - Juan J Giner-Casares
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Nanoquímica IUNAN, Facultad de Ciencias, Universidad de Córdoba (UCO) Campus de Rabanales, Ed. Marie Curie E-14071 Córdoba Spain
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10
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Altamirano-Bustamante NF, Garrido-Magaña E, Morán E, Calderón A, Pasten-Hidalgo K, Castillo-Rodríguez RA, Rojas G, Lara-Martínez R, Leyva-García E, Larralde-Laborde M, Domíguez G, Murata C, Margarita-Vazquez Y, Payro R, Barbosa M, Valderrama A, Montesinos H, Domínguez-Camacho A, García-Olmos VH, Ferrer R, Medina-Bravo PG, Santoscoy F, Revilla-Monsalve C, Jiménez-García LF, Morán J, Villalobos-Alva J, Villalobos MJ, Calzada-León R, Altamirano P, Altamirano-Bustamante MM. Protein-conformational diseases in childhood: Naturally-occurring hIAPP amyloid-oligomers and early β-cell damage in obesity and diabetes. PLoS One 2020; 15:e0237667. [PMID: 32833960 PMCID: PMC7446879 DOI: 10.1371/journal.pone.0237667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/30/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND AIMS This is the first time that obesity and diabetes mellitus (DM) as protein conformational diseases (PCD) are reported in children and they are typically diagnosed too late, when β-cell damage is evident. Here we wanted to investigate the level of naturally-ocurring or real (not synthetic) oligomeric aggregates of the human islet amyloid polypeptide (hIAPP) that we called RIAO in sera of pediatric patients with obesity and diabetes. We aimed to reduce the gap between basic biomedical research, clinical practice-health decision making and to explore whether RIAO work as a potential biomarker of early β-cell damage. MATERIALS AND METHODS We performed a multicentric collaborative, cross-sectional, analytical, ambispective and blinded study; the RIAO from pretreated samples (PTS) of sera of 146 pediatric patients with obesity or DM and 16 healthy children, were isolated, measured by sound indirect ELISA with novel anti-hIAPP cytotoxic oligomers polyclonal antibody (MEX1). We carried out morphological and functional studied and cluster-clinical data driven analysis. RESULTS We demonstrated by western blot, Transmission Electron Microscopy and cell viability experiments that RIAO circulate in the blood and can be measured by ELISA; are elevated in serum of childhood obesity and diabetes; are neurotoxics and works as biomarkers of early β-cell failure. We explored the range of evidence-based medicine clusters that included the RIAO level, which allowed us to classify and stratify the obesity patients with high cardiometabolic risk. CONCLUSIONS RIAO level increases as the number of complications rises; RIAOs > 3.35 μg/ml is a predictor of changes in the current indicators of β-cell damage. We proposed a novel physio-pathological pathway and shows that PCD affect not only elderly patients but also children. Here we reduced the gap between basic biomedical research, clinical practice and health decision making.
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MESH Headings
- Adolescent
- Animals
- Cell Line
- Cell Survival
- Cells, Cultured
- Child
- Child, Preschool
- Cross-Sectional Studies
- Diabetes Mellitus, Type 1/blood
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/pathology
- Humans
- Insulin-Secreting Cells/pathology
- Islet Amyloid Polypeptide/blood
- Islet Amyloid Polypeptide/metabolism
- Islet Amyloid Polypeptide/toxicity
- Islet Amyloid Polypeptide/ultrastructure
- Microscopy, Electron, Transmission
- Neurons/drug effects
- Obesity/blood
- Obesity/complications
- Obesity/pathology
- Pilot Projects
- Primary Cell Culture
- Protein Multimerization
- Protein Structure, Quaternary
- Rats
- Toxicity Tests, Acute
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Affiliation(s)
| | - Eulalia Garrido-Magaña
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Eugenia Morán
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Aurora Calderón
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Karina Pasten-Hidalgo
- Instituto Nacional de Pediatría, Mexico City, Mexico
- Cátedras Conacyt, Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
| | - Rosa Angélica Castillo-Rodríguez
- Instituto Nacional de Pediatría, Mexico City, Mexico
- Cátedras Conacyt, Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
| | - Gerardo Rojas
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Edgar Leyva-García
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Mateo Larralde-Laborde
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | | | | | - Rafael Payro
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Manuel Barbosa
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | | | | | | | - Regina Ferrer
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Fernanda Santoscoy
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Cristina Revilla-Monsalve
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Julio Morán
- Instituto de Fisiología Celular, UNAM, Mexico City, Mexico
| | - Jalil Villalobos-Alva
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Mario Javier Villalobos
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Perla Altamirano
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Myriam M. Altamirano-Bustamante
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
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11
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Milordini G, Zacco E, Percival M, Puglisi R, Dal Piaz F, Temussi P, Pastore A. The Role of Glycation on the Aggregation Properties of IAPP. Front Mol Biosci 2020; 7:104. [PMID: 32582762 PMCID: PMC7284065 DOI: 10.3389/fmolb.2020.00104] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 05/05/2020] [Indexed: 12/19/2022] Open
Abstract
Epidemiological evidence shows an increased risk for developing Alzheimer's disease in people affected by diabetes, a pathology associated with increased hyperglycemia. A potential factor that could explain this link could be the role that sugars may play in both diseases under the form of glycation. Contrary to glycosylation, glycation is an enzyme-free reaction that leads to formation of toxic advanced glycation end-products (AGEs). In diabetes, the islet amyloid polypeptide (IAPP or amylin) is found to be heavily glycated and to form toxic amyloid-like aggregates, similar to those observed for the Aβ peptides, often also heavily glycated, observed in Alzheimer patients. Here, we studied the effects of glycation on the structure and aggregation properties of IAPP with several biophysical techniques ranging from fluorescence to circular dichroism, mass spectrometry and atomic force microscopy. We demonstrate that glycation occurs exclusively on the N-terminal lysine leaving the only arginine (Arg11) unmodified. At variance with recent studies, we show that the dynamical interplay between glycation and aggregation affects the structure of the peptide, slows down the aggregation process and influences the aggregate morphology.
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Affiliation(s)
- Giulia Milordini
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
| | - Elsa Zacco
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
| | - Matthew Percival
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
| | - Rita Puglisi
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
| | - Fabrizio Dal Piaz
- Dipartimento di Medicina, Chirurgia e Odontoiatria "Scuola Medica Salernitana", University of Salerno, Salerno, Italy
| | - Pierandrea Temussi
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
| | - Annalisa Pastore
- UK Dementia Research Institute at the Maurice Wohl Institute of King's College London, London, United Kingdom
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Altamirano-Bustamante MM, Altamirano-Bustamante NF, Larralde-Laborde M, Lara-Martínez R, Leyva-García E, Garrido-Magaña E, Rojas G, Jiménez-García LF, Revilla-Monsalve C, Altamirano P, Calzada-León R. Unpacking the aggregation-oligomerization-fibrillization process of naturally-occurring hIAPP amyloid oligomers isolated directly from sera of children with obesity or diabetes mellitus. Sci Rep 2019; 9:18465. [PMID: 31804529 PMCID: PMC6895187 DOI: 10.1038/s41598-019-54570-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 11/14/2019] [Indexed: 12/14/2022] Open
Abstract
The formation of amyloid oligomers and fibrils of the human islet amyloid polypeptide (hIAPP) has been linked with β- cell failure and death which causes the onset, progression, and comorbidities of diabetes. We begin to unpack the aggregation-oligomerization-fibrillization process of these oligomers taken from sera of pediatric patients. The naturally occurring or real hIAPP (not synthetic) amyloid oligomers (RIAO) were successfully isolated, we demonstrated the presence of homo (dodecamers, hexamers, and trimers) and hetero-RIAO, as well as several biophysical characterizations which allow us to learn from the real phenomenon taking place. We found that the aggregation/oligomerization process is active in the sera and showed that it happens very fast. The RIAO can form fibers and react with anti-hIAPP and anti-amyloid oligomers antibodies. Our results opens the epistemic horizon and reveal real differences between the four groups (Controls vs obesity, T1DM or T2DM) accelerating the process of understanding and discovering novel and more efficient prevention, diagnostic, transmission and therapeutic pathways.
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Affiliation(s)
- Myriam M Altamirano-Bustamante
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico.
| | | | - Mateo Larralde-Laborde
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
| | | | - Edgar Leyva-García
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
| | - Eulalia Garrido-Magaña
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
| | - Gerardo Rojas
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
| | | | - Cristina Revilla-Monsalve
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
| | - Perla Altamirano
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico city, Mexico
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