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Rosú SA, Aguilar J, Urbano BF, Tarraga WA, Ramella NA, Longo GS, Finarelli GS, Sanchez Donoso SA, Tricerri MA. Interactions of variants of human apolipoprotein A-I with biopolymeric model matrices. Effect of collagen and heparin. Arch Biochem Biophys 2023; 750:109805. [PMID: 37913855 DOI: 10.1016/j.abb.2023.109805] [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: 08/10/2023] [Revised: 10/05/2023] [Accepted: 10/30/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND The extracellular matrix (ECM) is a complex tridimensional scaffold that actively participates in physiological and pathological events. The objective of this study was to test whether structural proteins of the ECM and glycosaminoglycans (GAGs) may favor the retention of human apolipoprotein A-I (apoA-I) variants associated with amyloidosis and atherosclerosis. METHODS Biopolymeric matrices containing collagen type I (Col, a main macromolecular component of the ECM) with or without heparin (Hep, a model of GAGs) were constructed and characterized, and used to compare the binding of apoA-I having the native sequence (Wt) or Arg173Pro, a natural variant inducing cardiac amyloidosis. Protein binding was observed by fluorescence microscopy and unbound proteins quantified by a colorimetric assay. RESULTS Both, Wt and Arg173Pro bound to the scaffolds containing Col, but the presence of Hep diminished the binding efficiency. Col-Hep matrices retained Arg173Pro more than the Wt. The retained protein was only partially removed from the matrices with saline solutions, indicating that electrostatic interactions may occur but are not the main driving force. Using in addition thermodynamic molecular simulations and size exclusion chromatography approaches, we suggest that the binding of apoA-I variants to the biopolymeric matrices is driven by many low affinity interactions. CONCLUSIONS Under this scenario Col-Hep scaffolds contribute to the binding of Arg173Pro, as a cooperative platform which could modify the native protein conformation affecting protein folding. GENERAL SIGNIFICANCE We show that the composition of the ECM is key to the protein retention, and well characterized biosynthetic matrices offer an invaluable in vitro model to mimic the hallmark of pathologies with interstitial infiltration such as cardiac amyloidosis.
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Affiliation(s)
- Silvana A Rosú
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET. Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata, Buenos Aires, Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Joao Aguilar
- Laboratorio de Interacciones Macromoleculares (LIMM), Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Bruno F Urbano
- Laboratorio de Interacciones Macromoleculares (LIMM), Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Wilson A Tarraga
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata-CONICET, La Plata, Buenos Aires, Argentina
| | - Nahuel A Ramella
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET. Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata, Buenos Aires, Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Gabriel S Longo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata-CONICET, La Plata, Buenos Aires, Argentina
| | - Gabriela S Finarelli
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET. Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata, Buenos Aires, Argentina
| | - Susana A Sanchez Donoso
- Laboratorio de Interacciones Macromoleculares (LIMM), Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile.
| | - M Alejandra Tricerri
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET. Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata, Buenos Aires, Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
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2
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Chandrasekhar G, Chandra Sekar P, Srinivasan E, Amarnath A, Pengyong H, Rajasekaran R. Molecular simulation unravels the amyloidogenic misfolding of nascent ApoA1 protein, driven by deleterious point mutations occurring in between 170-178 hotspot region. J Biomol Struct Dyn 2022; 40:13278-13290. [PMID: 34613891 DOI: 10.1080/07391102.2021.1986134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Protein ApoA1 is extensively studied for its role in lipid metabolism. Its seedy dark side of amyloid formulation remains relatively understudied yet. Due to genetic mutations, the protein pathologically misshapes into its amyloid form that gets accumulated in various organs, including the heart. To contrive effective therapeutics against this debilitating congenital disorder, it is imperative to comprehend the structural ramifications induced by mutations in APoA1's dynamic conformation. Till now, several point mutations have been implicated in ApoA1's amyloidosis, although only a handful has been examined considerably. Especially, the single nucleotide polymorphisms (SNPs) that occur in-between 170-178 mutation hotspot site of APoA1 needs to be investigated, since most of them are culpable of amyloid deposition in the heart. To that effect, in the present study, we have computationally quantified and studied the ApoA1's biomolecular modifications fostered by SNPs in the 170-178 mutation hotspot. Findings from discrete molecular dynamics simulation studies indicate that the SNPs have noticeably steered the ApoA1's behaviour from its native structural dynamics. Analysis of protein's secondary structural changes exhibits a considerable change upon mutations. Further, subjecting the protein structures to simulated thermal denaturation shows increased resistance to denaturation among mutants when compared to native. Further, normal mode analysis of protein's dynamic motion also shows discrepancy in its dynamic structural change upon SNP. These structural digressions induced by SNPs can very well be the biomolecular incendiary that drives ApoA1 into its amyloidogenesis. And, understanding these structural modifications initiates a better understanding of SNP's amyloidogenic pathology on APoA1.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- G Chandrasekhar
- Bioinformatics Lab, Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - P Chandra Sekar
- Bioinformatics Lab, Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - E Srinivasan
- Bioinformatics Lab, Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - A Amarnath
- Bioinformatics Lab, Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - H Pengyong
- Central Lab, Changzhi Medical College, Changzhi, China
| | - R Rajasekaran
- Bioinformatics Lab, Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
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3
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Napolitano G, Fasciolo G, Tomajoli MTM, Carlucci A, Ascione E, Salvatore A. Effects of superoxide anion attack on the lipoprotein HDL. Mol Cell Biochem 2022; 478:1059-1066. [PMID: 36219354 PMCID: PMC10126046 DOI: 10.1007/s11010-022-04563-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 09/15/2022] [Indexed: 11/30/2022]
Abstract
High-density lipoprotein (HDL) is an anti-atherosclerotic lipoprotein. Thanks to the activity of apolipoprotein ApoA1, the principal protein component of HDL, this last is responsible for converting cholesterol into ester form and transporting excessive cholesterol to the liver ("reverse cholesterol transport" RCT). When HDL undergoes oxidation, it becomes dysfunctional and proatherogenic. ApoA1 is a target of oxidation, and its alteration affects RCT and contributes to atherosclerosis development. Until now, the mechanism of HDL oxidation is not fully understood and only hydroxyl radicals seem to induce direct oxidation of protein and lipidic components of lipoproteins. Here we demonstrate that superoxide radical, widely produced in early atherosclerosis, directly oxidizes HDL, and as a consequence, ApoA1 undergoes structural alterations impairing its anti-atherosclerotic functions. Our results highlight in an in vitro system the potential mechanism by which O2·- triggers atherosclerotic pathogenesis in vivo. Our study gets the basis for therapeutic approaches focused on the management of superoxide generation in early atherosclerosis onset.
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Affiliation(s)
- Gaetana Napolitano
- Dipartimento di Scienze e Tecnologie, Università degli Studi di Napoli Parthenope, via Acton n. 38-I, 80133, Naples, Italy.
- International PhD Programme/UNESCO Chair "Environment, Resources and Sustainable Development", Department of Science and Technology, Parthenope University of Naples, Naples, Italy.
| | - Gianluca Fasciolo
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia, 80126, Naples, Italy
| | - Maria Teresa Muscari Tomajoli
- Dipartimento di Scienze e Tecnologie, Università degli Studi di Napoli Parthenope, via Acton n. 38-I, 80133, Naples, Italy
- International PhD Programme/UNESCO Chair "Environment, Resources and Sustainable Development", Department of Science and Technology, Parthenope University of Naples, Naples, Italy
| | - Alessandro Carlucci
- S. Antimo Industrial Development Department, Kedrion Biopharma, Strada Statale 7 Bis 19, Sant'Antimo, 80029, Napoli, Italia
| | - Ester Ascione
- S. Antimo Industrial Development Department, Kedrion Biopharma, Strada Statale 7 Bis 19, Sant'Antimo, 80029, Napoli, Italia
| | - Alfonso Salvatore
- S. Antimo Industrial Development Department, Kedrion Biopharma, Strada Statale 7 Bis 19, Sant'Antimo, 80029, Napoli, Italia
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On the Aggregation of Apolipoprotein A-I. Int J Mol Sci 2022; 23:ijms23158780. [PMID: 35955915 PMCID: PMC9369196 DOI: 10.3390/ijms23158780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/30/2022] [Accepted: 08/02/2022] [Indexed: 11/17/2022] Open
Abstract
In vivo, apolipoprotein A-I (ApoA-I) is commonly found together with lipids in so-called lipoprotein particles. The protein has also been associated with several diseases—such as atherosclerosis and amyloidosis—where insoluble aggregates containing ApoA-I are deposited in various organs or arteries. The deposited ApoA-I has been found in the form of amyloid fibrils, suggesting that amyloid formation may be involved in the development of these diseases. In the present study we investigated ApoA-I aggregation into amyloid fibrils and other aggregate morphologies. We studied the aggregation of wildtype ApoA-I as well as a disease-associated mutant, ApoA-I K107Δ, under different solution conditions. The aggregation was followed using thioflavin T fluorescence intensity. For selected samples the aggregates formed were characterized in terms of size, secondary structure content, and morphology using circular dichroism spectroscopy, dynamic light scattering, atomic force microscopy and cryo transmission electron microscopy. We find that ApoA-I may form globular protein-only condensates, in which the α-helical conformation of the protein is retained. The protein in its unmodified form appears resistant to amyloid formation; however, the conversion into amyloid fibrils rich in β-sheet is facilitated by oxidation or mutation. In particular, the K107Δ mutant shows higher amyloid formation propensity, and the end state appears to be a co-existence of β-sheet rich amyloid fibrils and α-helix-rich condensates.
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Gisonno RA, Masson T, Ramella NA, Barrera EE, Romanowski V, Tricerri MA. Evolutionary and structural constraints influencing apolipoprotein A-I amyloid behavior. Proteins 2021; 90:258-269. [PMID: 34414600 DOI: 10.1002/prot.26217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/27/2021] [Accepted: 08/09/2021] [Indexed: 12/13/2022]
Abstract
Apolipoprotein A-I (apoA-I) has a key function in the reverse cholesterol transport. However, aggregation of apoA-I single point mutants can lead to hereditary amyloid pathology. Although several studies have tackled the biophysical and structural consequences introduced by these mutations, there is little information addressing the relationship between the evolutionary and structural features that contribute to the amyloid behavior of apoA-I. We combined evolutionary studies, in silico mutagenesis and molecular dynamics (MD) simulations to provide a comprehensive analysis of the conservation and pathogenic role of the aggregation-prone regions (APRs) present in apoA-I. Sequence analysis demonstrated that among the four amyloidogenic regions described for human apoA-I, only two (APR1 and APR4) are evolutionary conserved across different species of Sarcopterygii. Moreover, stability analysis carried out with the FoldX engine showed that APR1 contributes to the marginal stability of apoA-I. Structural properties of full-length apoA-I models suggest that aggregation is avoided by placing APRs into highly packed and rigid portions of its native fold. Compared to silent variants extracted from the gnomAD database, the thermodynamic and pathogenic impact of amyloid mutations showed evidence of a higher destabilizing effect. MD simulations of the amyloid variant G26R evidenced the partial unfolding of the alpha-helix bundle with the concomitant exposure of APR1 to the solvent, suggesting an insight into the early steps involved in its aggregation. Our findings highlight APR1 as a relevant component for apoA-I structural integrity and emphasize a destabilizing effect of amyloid variants that leads to the exposure of this region.
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Affiliation(s)
- Romina A Gisonno
- Facultad de Ciencias Médicas, Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP, CONICET-UNLP), Universidad Nacional de La Plata, La Plata, Argentina
| | - Tomas Masson
- Facultad de Ciencias Exactas, Instituto de Biotecnología y Biología Molecular (IBBM, CONICET-UNLP), Universidad Nacional de La Plata, La Plata, Argentina
| | - Nahuel A Ramella
- Facultad de Ciencias Médicas, Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP, CONICET-UNLP), Universidad Nacional de La Plata, La Plata, Argentina
| | - Exequiel E Barrera
- Group of Biomolecular Simulations, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Víctor Romanowski
- Facultad de Ciencias Exactas, Instituto de Biotecnología y Biología Molecular (IBBM, CONICET-UNLP), Universidad Nacional de La Plata, La Plata, Argentina
| | - M Alejandra Tricerri
- Facultad de Ciencias Médicas, Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP, CONICET-UNLP), Universidad Nacional de La Plata, La Plata, Argentina
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6
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Lee CK, Liao CW, Meng SW, Wu WK, Chiang JY, Wu MS. Lipids and Lipoproteins in Health and Disease: Focus on Targeting Atherosclerosis. Biomedicines 2021; 9:biomedicines9080985. [PMID: 34440189 PMCID: PMC8393881 DOI: 10.3390/biomedicines9080985] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/01/2021] [Accepted: 08/04/2021] [Indexed: 12/15/2022] Open
Abstract
Despite advances in pharmacotherapy, intervention devices and techniques, residual cardiovascular risks still cause a large burden on public health. Whilst most guidelines encourage achieving target levels of specific lipids and lipoproteins to reduce these risks, increasing evidence has shown that molecular modification of these lipoproteins also has a critical impact on their atherogenicity. Modification of low-density lipoprotein (LDL) by oxidation, glycation, peroxidation, apolipoprotein C-III adhesion, and the small dense subtype largely augment its atherogenicity. Post-translational modification by oxidation, carbamylation, glycation, and imbalance of molecular components can reduce the capacity of high-density lipoprotein (HDL) for reverse cholesterol transport. Elevated levels of triglycerides (TGs), apolipoprotein C-III and lipoprotein(a), and a decreased level of apolipoprotein A-I are closely associated with atherosclerotic cardiovascular disease. Pharmacotherapies aimed at reducing TGs, lipoprotein(a), and apolipoprotein C-III, and enhancing apolipoprotein A-1 are undergoing trials, and promising preliminary results have been reported. In this review, we aim to update the evidence on modifications of major lipid and lipoprotein components, including LDL, HDL, TG, apolipoprotein, and lipoprotein(a). We also discuss examples of translating findings from basic research to potential therapeutic targets for drug development.
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Affiliation(s)
- Chih-Kuo Lee
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu 300, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Che-Wei Liao
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Department of Internal Medicine, National Taiwan University Cancer Center, Taipei 106, Taiwan
| | - Shih-Wei Meng
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu 300, Taiwan
| | - Wei-Kai Wu
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Jiun-Yang Chiang
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei 100, Taiwan
- Correspondence: (J.-Y.C.); (M.-S.W.)
| | - Ming-Shiang Wu
- College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-K.L.); (C.-W.L.); (S.-W.M.); (W.-K.W.)
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei 100, Taiwan
- Correspondence: (J.-Y.C.); (M.-S.W.)
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Patel AY, Jonnalagadda KS, Paradis N, Vaden TD, Wu C, Caputo GA. Effects of Ionic Liquids on Metalloproteins. Molecules 2021; 26:514. [PMID: 33478102 PMCID: PMC7835893 DOI: 10.3390/molecules26020514] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/04/2021] [Accepted: 01/08/2021] [Indexed: 01/28/2023] Open
Abstract
In the past decade, innovative protein therapies and bio-similar industries have grown rapidly. Additionally, ionic liquids (ILs) have been an area of great interest and rapid development in industrial processes over a similar timeline. Therefore, there is a pressing need to understand the structure and function of proteins in novel environments with ILs. Understanding the short-term and long-term stability of protein molecules in IL formulations will be key to using ILs for protein technologies. Similarly, ILs have been investigated as part of therapeutic delivery systems and implicated in numerous studies in which ILs impact the activity and/or stability of protein molecules. Notably, many of the proteins used in industrial applications are involved in redox chemistry, and thus often contain metal ions or metal-associated cofactors. In this review article, we focus on the current understanding of protein structure-function relationship in the presence of ILs, specifically focusing on the effect of ILs on metal containing proteins.
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Affiliation(s)
- Aashka Y. Patel
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | | | - Nicholas Paradis
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Timothy D. Vaden
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Chun Wu
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
| | - Gregory A. Caputo
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
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Ma'arfi F, Chandra S, Fatima JE, Khan MY, Mir SS, Yusuf MA. Probing the Structure-Function relationship and amyloidogenic propensities in natural variants of apolipoprotein A-I. Biochem Biophys Rep 2020; 24:100815. [PMID: 33024841 PMCID: PMC7527581 DOI: 10.1016/j.bbrep.2020.100815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 09/09/2020] [Accepted: 09/13/2020] [Indexed: 11/25/2022] Open
Abstract
Background Apolipoprotein A-I (apoA-I) protects against atherosclerosis and participates in the removal of excess cellular cholesterol from peripheral organs. Several naturally occurring apoA-I mutations are associated with familial systemic amyloidosis, with deposition of amyloid aggregates in peripheral organs, resulting in multiple organ failure. Systematic studies on naturally occurring variants are needed to delineate their roles and involvement in pathogenesis. Methods We performed a comparative structure–function analysis of five naturally occurring apoA-I variants and the wild-type protein. Circular dichroism, Fourier-transform infrared spectroscopy, thioflavin T and congo red fluorescence assays, thermal, chemical, and proteolytic stability assays, and 1,2-Dimyristoyl-sn-glycero-3-phosphocholine clearance analyses were used to assess the effects of mutations on the structure, function, stability, aggregation, and proteolytic susceptibility of the proteins to explore the mechanisms underlying amyloidosis and hypercholesterolemia. Results We observed structural changes in the mutants independent of fibril formation, suggesting the influence of the surrounding environment. The mutants were involved in aggregate formation to varying degree; L170P, R173P, and V156E showed an increased propensity to aggregate under different physiological conditions. β sheet formation indicates that L170P and R173P participate in amyloid formation. Compared to WT, V156E and L170P exhibited higher capacity for lipid clearance. Conclusions The selected point mutations, including those outside the hot spot regions of apoA-I structure, perturb the physiochemical and conformational behavior of the protein, influencing its function. General significance The study provides insights into the structure–function relationships of naturally occurring apoA-I variants outside the hot spot mutation sites. Several apoA-I mutants are associated with systemic amyloidosis. Structure–function analysis of five apoA-I variants and wild-type protein was done. Point mutations alter the physicochemical behavior and conformation of the variants.
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Affiliation(s)
- Farah Ma'arfi
- Department of Bioengineering, Integral University, Kursi Road, Dasauli, Lucknow, 226026, India
| | - Subhash Chandra
- School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Jamal e Fatima
- Department of Bioengineering, Integral University, Kursi Road, Dasauli, Lucknow, 226026, India
| | - Mohd Yasir Khan
- Department of Biosciences, Integral University, Kursi Road, Dasauli, Lucknow, 226026, India
| | - Snober S. Mir
- Department of Bioengineering, Integral University, Kursi Road, Dasauli, Lucknow, 226026, India
| | - Mohd Aslam Yusuf
- Department of Bioengineering, Integral University, Kursi Road, Dasauli, Lucknow, 226026, India
- Corresponding author. ;
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Ludovico ID, Gisonno RA, Gonzalez MC, Garda HA, Ramella NA, Tricerri MA. Understanding the role of apolipoproteinA-I in atherosclerosis. Post-translational modifications synergize dysfunction? Biochim Biophys Acta Gen Subj 2020; 1865:129732. [PMID: 32946930 DOI: 10.1016/j.bbagen.2020.129732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 08/17/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND The identification of dysfunctional human apolipoprotein A-I (apoA-I) in atherosclerotic plaques suggests that protein structure and function may be hampered under a chronic pro inflammatory scenario. Moreover, the fact that natural mutants of this protein elicit severe cardiovascular diseases (CVD) strongly indicates that the native folding could shift due to the mutation, yielding a structure more prone to misfold or misfunction. To understand the events that determine the failure of apoA-I structural flexibility to fulfill its protective role, we took advantage of the study of a natural variant with a deletion of the residue lysine 107 (K107del) associated with atherosclerosis. METHODS Biophysical approaches, such as electrophoresis, fluorescence and spectroscopy were used to characterize proteins structure and function, either in native conformation or under oxidation or intramolecular crosslinking. RESULTS K107del structure was more flexible than the protein with the native sequence (Wt) but interactions with artificial membranes were preserved. Instead, structural restrictions by intramolecular crosslinking impaired the Wt and K107del lipid solubilization function. In addition, controlled oxidation decreased the yield of the native dimer conformation for both variants. CONCLUSIONS We conclude that even though mutations may alter protein structure and spatial arrangement, the highly flexible conformation compensates the mild shift from the native folding. Instead, post translational apoA-I modifications (probably chronic and progressive) are required to raise a protein conformation with significant loss of function and increased aggregation tendency. GENERAL SIGNIFICANCE The results learnt from this variant strength a close association between amyloidosis and atherosclerosis.
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Affiliation(s)
- Ivo Díaz Ludovico
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina
| | - Romina A Gisonno
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina
| | - Marina C Gonzalez
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina
| | - Horacio A Garda
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina
| | - Nahuel A Ramella
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina.
| | - M Alejandra Tricerri
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Argentina; Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata CP 1900, Argentina.
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10
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Gaddi GM, Gisonno RA, Rosú SA, Cortez MF, Finarelli GS, Ramella NA, Tricerri MA. Data regarding the sensibility to proteolysis of a natural apolipoprotein A-I mutant. Data Brief 2020; 31:105960. [PMID: 32676531 PMCID: PMC7352074 DOI: 10.1016/j.dib.2020.105960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/22/2020] [Accepted: 06/29/2020] [Indexed: 11/18/2022] Open
Abstract
The article shows dataset of the proteolysis of a natural variant of apolipoprotein A-I (apoA-I) with a substitution of a leucine by and arginine in position 60 (L60R), in comparison with the protein with the native sequence (Wt). This information demonstrates the potential of in vitro partial proteolysis experiments as it may be applicable to different approaches in the biophysical field. We have analyzed by different electrophoresis techniques apoA-I variants, quantified the degree of proteolysis after staining and compared the proteolysis efficiency with the computed cleavage patterns. The data shown here clearly strengthen the usefulness of this approach to test protein flexibility, as it may be attained with enzymes which are not expected to modify in vivo this protein but have a well-known digestion pattern. In addition it is appropriate for evaluating protein catabolism, as it is exemplified here by the evidence with metalloproteinase 12 (MMP-12), which is a physiological protease that may elicit the pro-inflammatory processing of this variant within the lesions. We support the work “Structural analysis of a natural apolipoprotein A-I variant (L60R) associated with amyloidosis” (Gaddi, et al., 2020), gaining insights on protein folding from a characterization by proteolysis analysis [1].
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Affiliation(s)
- Gisela M. Gaddi
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120. La Plata, Buenos Aires, Argentina
| | - Romina A. Gisonno
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120. La Plata, Buenos Aires, Argentina
| | - Silvana A. Rosú
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120. La Plata, Buenos Aires, Argentina
| | - M. Fernanda Cortez
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
| | - Gabriela S. Finarelli
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
| | - Nahuel A. Ramella
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120. La Plata, Buenos Aires, Argentina
- Corresponding authors at: Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
| | - M. Alejandra Tricerri
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120. La Plata, Buenos Aires, Argentina
- Corresponding authors at: Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina
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11
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Gaddi GM, Gisonno RA, Rosú SA, Curto LM, Prieto ED, Schinella GR, Finarelli GS, Cortez MF, Bauzá L, Elías EE, Ramella NA, Tricerri MA. Structural analysis of a natural apolipoprotein A-I variant (L60R) associated with amyloidosis. Arch Biochem Biophys 2020; 685:108347. [DOI: 10.1016/j.abb.2020.108347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 03/12/2020] [Accepted: 03/14/2020] [Indexed: 01/11/2023]
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12
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Ramella NA, Andújar I, Ríos JL, Rosú SA, Tricerri MA, Schinella GR. Human apolipoprotein A-I Gly26Arg stimulation of inflammatory responses via NF-kB activation: Potential roles in amyloidosis? PATHOPHYSIOLOGY 2018; 25:397-404. [DOI: 10.1016/j.pathophys.2018.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/16/2018] [Accepted: 08/07/2018] [Indexed: 01/29/2023] Open
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13
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Morgado I, Panahi A, Burwash AG, Das M, Straub JE, Gursky O. Molecular Insights into Human Hereditary Apolipoprotein A-I Amyloidosis Caused by the Glu34Lys Mutation. Biochemistry 2018; 57:5738-5747. [PMID: 30184436 DOI: 10.1021/acs.biochem.8b00817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hereditary apolipoprotein A-I (apoA-I) amyloidosis is a life-threatening incurable genetic disorder whose molecular underpinnings are unclear. In this disease, variant apoA-I, the major structural and functional protein of high-density lipoprotein, is released in a free form, undergoes an α-helix to intermolecular cross-β-sheet conversion along with a proteolytic cleavage, and is deposited as amyloid fibrils in various organs, which can cause organ damage and death. Glu34Lys is the only known charge inversion mutation in apoA-I that causes human amyloidosis. To elucidate the structural underpinnings of the amyloidogenic behavior of Glu34Lys apoA-I, we generated its recombinant globular N-terminal domain (residues 1-184) and compared the conformation and dynamics of its lipid-free form with those of two other naturally occurring apoA-I variants, Phe71Tyr (amyloidogenic) and Leu159Arg (non-amyloidogenic). All variants showed reduced structural stability and altered aromatic residue packing. The greatest decrease in stability was observed in the non-amyloidogenic variant, suggesting that amyloid formation is driven by local structural perturbations at sensitive sites. Molecular dynamics simulations revealed local helical unfolding and suggested that transient opening of the Trp72 side chain induced mutation-dependent structural perturbations in a sensitive region, including the major amyloid hot spot residues Leu14-Leu22. We posit that a shift from the "closed" to the "open" orientation of the Trp72 side chain modulates structural protection of amyloid hot spots, suggesting a previously unknown early step in the protein misfolding pathway.
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Affiliation(s)
- Isabel Morgado
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118-2526, United States
| | - Afra Panahi
- Department of Chemistry, Boston University, Boston, Massachusetts 02215-2521, United States
| | - Andrew G. Burwash
- Department of Chemistry, Boston University, Boston, Massachusetts 02215-2521, United States
| | - Madhurima Das
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118-2526, United States
| | - John E. Straub
- Department of Chemistry, Boston University, Boston, Massachusetts 02215-2521, United States
| | - Olga Gursky
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118-2526, United States
- Amyloidosis Treatment and Research Center, Boston University School of Medicine, Boston, Massachusetts 02118, United States
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14
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Effect of Phosphatidylserine and Cholesterol on Membrane-mediated Fibril Formation by the N-terminal Amyloidogenic Fragment of Apolipoprotein A-I. Sci Rep 2018; 8:5497. [PMID: 29615818 PMCID: PMC5882889 DOI: 10.1038/s41598-018-23920-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 03/22/2018] [Indexed: 01/31/2023] Open
Abstract
Here, we examined the effects of phosphatidylserine (PS) and cholesterol on the fibril-forming properties of the N-terminal 1‒83 fragment of an amyloidogenic G26R variant of apoA-I bound to small unilamellar vesicles. A thioflavin T fluorescence assay together with microscopic observations showed that PS significantly retards the nucleation step in fibril formation by apoA-I 1‒83/G26R, whereas cholesterol slightly enhances fibril formation. Circular dichroism analyses demonstrated that PS facilitates a structural transition from random coil to α-helix in apoA-I 1‒83/G26R with great stabilization of the α-helical structure upon lipid binding. Isothermal titration calorimetry measurements revealed that PS induces a marked increase in capacity for binding of apoA-I 1‒83/G26R to the membrane surface, perhaps due to electrostatic interactions of positively charged amino acids in apoA-I with PS. Such effects of PS to enhance lipid interactions and inhibit fibril formation of apoA-I were also observed for the amyloidogenic region-containing apoA-I 8‒33/G26R peptide. Fluorescence measurements using environment-sensitive probes indicated that PS induces a more solvent-exposed, membrane-bound conformation in the amyloidogenic region of apoA-I without affecting membrane fluidity. Since cell membranes have highly heterogeneous lipid compositions, our findings may provide a molecular basis for the preferential deposition of apoA-I amyloid fibrils in tissues and organs.
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15
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The acidic pH-induced structural changes in apo-CP43 by spectral methodologies and molecular dynamics simulations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.09.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Del Giudice R, Domingo-Espín J, Iacobucci I, Nilsson O, Monti M, Monti DM, Lagerstedt JO. Structural determinants in ApoA-I amyloidogenic variants explain improved cholesterol metabolism despite low HDL levels. Biochim Biophys Acta Mol Basis Dis 2017; 1863:3038-3048. [PMID: 28887204 DOI: 10.1016/j.bbadis.2017.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 11/19/2022]
Abstract
Twenty Apolipoprotein A-I (ApoA-I) variants are responsible for a systemic hereditary amyloidosis in which protein fibrils can accumulate in different organs, leading to their failure. Several ApoA-I amyloidogenic mutations are also associated with hypoalphalipoproteinemia, low ApoA-I and high-density lipoprotein (HDL)-cholesterol plasma levels; however, subjects affected by ApoA-I-related amyloidosis do not show a higher risk of cardiovascular diseases (CVD). The structural features, the lipid binding properties and the functionality of four ApoA-I amyloidogenic variants were therefore inspected in order to clarify the paradox observed in the clinical phenotype of the affected subjects. Our results show that ApoA-I amyloidogenic variants are characterized by a different oligomerization pattern and that the position of the mutation in the ApoA-I sequence affects the molecular structure of the formed HDL particles. Although lipidation increases ApoA-I proteins stability, all the amyloidogenic variants analyzed show a lower affinity for lipids, both in vitro and in ex vivo mouse serum. Interestingly, the lower efficiency at forming HDL particles is compensated by a higher efficiency at catalysing cholesterol efflux from macrophages. The decreased affinity of ApoA-I amyloidogenic variants for lipids, together with the increased efficiency in the cholesterol efflux process, could explain why, despite the unfavourable lipid profile, patients affected by ApoA-I related amyloidosis do not show a higher CVD risk.
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Affiliation(s)
- Rita Del Giudice
- Department of Experimental Medical Science, Lund University, 221 84 Lund, Sweden.
| | - Joan Domingo-Espín
- Department of Experimental Medical Science, Lund University, 221 84 Lund, Sweden
| | - Ilaria Iacobucci
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
| | - Oktawia Nilsson
- Department of Experimental Medical Science, Lund University, 221 84 Lund, Sweden
| | - Maria Monti
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; Istituto Nazionale di Biostrutture e Biosistemi (INBB), Rome, Italy
| | - Daria Maria Monti
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; Istituto Nazionale di Biostrutture e Biosistemi (INBB), Rome, Italy
| | - Jens O Lagerstedt
- Department of Experimental Medical Science, Lund University, 221 84 Lund, Sweden.
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17
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Rosú SA, Toledo L, Urbano BF, Sanchez SA, Calabrese GC, Tricerri MA. Learning from Synthetic Models of Extracellular Matrix; Differential Binding of Wild Type and Amyloidogenic Human Apolipoprotein A-I to Hydrogels Formed from Molecules Having Charges Similar to Those Found in Natural GAGs. Protein J 2017. [PMID: 28634774 DOI: 10.1007/s10930-017-9728-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Among other components of the extracellular matrix (ECM), glycoproteins and glycosaminoglycans (GAGs) have been strongly associated to the retention or misfolding of different proteins inducing the formation of deposits in amyloid diseases. The composition of these molecules is highly diverse and a key issue seems to be the equilibrium between physiological and pathological events. In order to have a model in which the composition of the matrix could be finely controlled, we designed and synthesized crosslinked hydrophilic polymers, the so-called hydrogels varying the amounts of negative charges and hydroxyl groups that are prevalent in GAGs. We checked and compared by fluorescence techniques the binding of human apolipoprotein A-I and a natural mutant involved in amyloidosis to the hydrogel scaffolds. Our results indicate that both proteins are highly retained as long as the negative charge increases, and in addition it was shown that the mutant is more retained than the Wt, indicating that the retention of specific proteins in the ECM could be part of the pathogenicity. These results show the importance of the use of these polymers as a model to get deep insight into the studies of proteins within macromolecules.
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Affiliation(s)
- Silvana A Rosú
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina.,Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120 S/N La Plata, 1900, La Plata, Buenos Aires, Argentina
| | - Leandro Toledo
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Bruno F Urbano
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Susana A Sanchez
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Graciela C Calabrese
- Cátedra de Biología Celular y Molecular, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, Primer Piso, C1113AAD, Buenos Aires, Argentina
| | - M Alejandra Tricerri
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET, La Plata, Buenos Aires, Argentina. .,Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120 S/N La Plata, 1900, La Plata, Buenos Aires, Argentina.
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18
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Townsend D, Hughes E, Hussain R, Siligardi G, Baldock S, Madine J, Middleton DA. Heparin and Methionine Oxidation Promote the Formation of Apolipoprotein A-I Amyloid Comprising α-Helical and β-Sheet Structures. Biochemistry 2017; 56:1632-1644. [DOI: 10.1021/acs.biochem.6b01120] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- David Townsend
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - Eleri Hughes
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - Rohanah Hussain
- Diamond Light Source Ltd., Diamond House, Harwell Science & Innovation Campus, Didcot OX11 0DE, Oxon, England
| | - Giuliano Siligardi
- Diamond Light Source Ltd., Diamond House, Harwell Science & Innovation Campus, Didcot OX11 0DE, Oxon, England
| | - Sarah Baldock
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - Jillian Madine
- Department of Biochemistry, Institute
of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - David A. Middleton
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
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19
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Zheng S, Han T, Xu H, Zhou H, Ren X, Wu P, Zheng J, Wang L, Zhang M, Jiang Y, Chen Y, Qiu H, Liu W, Hu Y. Associations of apolipoprotein B/apolipoprotein A-I ratio with pre-diabetes and diabetes risks: a cross-sectional study in Chinese adults. BMJ Open 2017; 7:e014038. [PMID: 28110289 PMCID: PMC5253599 DOI: 10.1136/bmjopen-2016-014038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Apolipoprotein B/apolipoprotein A-I (ApoB/ApoA-I) ratio is a useful predictor of cardiovascular risk. However, the association between the ApoB/ApoA-I ratio and the risk of type 2 diabetes mellitus (T2DM) is still obscure. AIMS To investigate the associations between the ApoB/ApoA-I ratio and the risk of T2DM and pre-diabetes in a Chinese population, and to assess the role of gender in these associations. METHODS A stratified random sampling design was used in this cross-sectional study which included 264 men and 465 women with normal glucose tolerance (NGT), pre-diabetes or T2DM. Serum ApoB, ApoA-I and other lipid and glycaemic traits were measured. Pearson's partial correlation and multivariable logistic analysis were used to evaluate the associations between ApoB/ApoA-I ratio and the risk of T2DM and pre-diabetes. RESULTS The ApoB/ApoA-I ratios were significantly increased across the spectrum of NGT, pre-diabetes and T2DM. Women showed higher levels of ApoB/ApoA-I ratio and ApoB than men in the pre-diabetic and T2DM groups, but not in the NGT group. The ApoB/ApoA-I ratio was closely related with triglyceride, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and other glycaemic traits. Moreover, in women, the risk of diabetes and pre-diabetes in the top and middle tertiles of the ApoB/ApoA-I ratio were 3.65-fold (95% CI 1.69 to 6.10) and 2.19-fold (95% CI 1.38 to 2.84) higher than in the bottom tertile, respectively, after adjusting for potential confounding factors. However, the associations disappeared in men after adjusting for other factors. CONCLUSIONS The ApoB/ApoA-I ratio showed positive associations with the risk of diabetes and pre-diabetes in Chinese women.
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Affiliation(s)
- Shuang Zheng
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Tingting Han
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Hua Xu
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Huan Zhou
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Xingxing Ren
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Peihong Wu
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jun Zheng
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Lihua Wang
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Ming Zhang
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yihong Jiang
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yawen Chen
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Huiying Qiu
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Wei Liu
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yaomin Hu
- Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
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20
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Arciello A, Piccoli R, Monti DM. Apolipoprotein A-I: the dual face of a protein. FEBS Lett 2016; 590:4171-4179. [DOI: 10.1002/1873-3468.12468] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/12/2016] [Accepted: 10/24/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Angela Arciello
- Department of Chemical Sciences; University of Naples Federico II; Italy
- Istituto Nazionale di Biostrutture e Biosistemi (INBB); Rome Italy
| | - Renata Piccoli
- Department of Chemical Sciences; University of Naples Federico II; Italy
- Istituto Nazionale di Biostrutture e Biosistemi (INBB); Rome Italy
| | - Daria Maria Monti
- Department of Chemical Sciences; University of Naples Federico II; Italy
- Istituto Nazionale di Biostrutture e Biosistemi (INBB); Rome Italy
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21
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Mikawa S, Mizuguchi C, Nishitsuji K, Baba T, Shigenaga A, Shimanouchi T, Sakashita N, Otaka A, Akaji K, Saito H. Heparin promotes fibril formation by the N-terminal fragment of amyloidogenic apolipoprotein A-I. FEBS Lett 2016; 590:3492-3500. [DOI: 10.1002/1873-3468.12426] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/05/2016] [Accepted: 09/11/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Shiho Mikawa
- Department of Biophysical Chemistry; Kyoto Pharmaceutical University; Japan
- Institute of Biomedical Sciences; Graduate School of Pharmaceutical Sciences; Tokushima University; Japan
| | - Chiharu Mizuguchi
- Department of Biophysical Chemistry; Kyoto Pharmaceutical University; Japan
- Institute of Biomedical Sciences; Graduate School of Pharmaceutical Sciences; Tokushima University; Japan
| | - Kazuchika Nishitsuji
- Department of Molecular Pathology; Institute of Biomedical Sciences; Tokushima University Graduate School; Japan
| | - Teruhiko Baba
- Biotechnology Research Institute for Drug Discovery; National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Japan
| | - Akira Shigenaga
- Institute of Biomedical Sciences; Graduate School of Pharmaceutical Sciences; Tokushima University; Japan
| | | | - Naomi Sakashita
- Department of Molecular Pathology; Institute of Biomedical Sciences; Tokushima University Graduate School; Japan
| | - Akira Otaka
- Institute of Biomedical Sciences; Graduate School of Pharmaceutical Sciences; Tokushima University; Japan
| | - Kenichi Akaji
- Department of Medicinal Chemistry; Kyoto Pharmaceutical University; Japan
| | - Hiroyuki Saito
- Department of Biophysical Chemistry; Kyoto Pharmaceutical University; Japan
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22
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Schönfeld HJ, Roessner D, Seelig J. Self-Association of Apo A-1 Studied with Dynamic and Static Light Scattering. J Phys Chem B 2016; 120:1228-35. [DOI: 10.1021/acs.jpcb.5b12397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Dierk Roessner
- Wyatt Technology Europe GmbH, Hochstraße 12a, DE-56307 Dernbach, Germany
| | - Joachim Seelig
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, CH-4056 Basel, Switzerland
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23
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Protein conformational perturbations in hereditary amyloidosis: Differential impact of single point mutations in ApoAI amyloidogenic variants. Biochim Biophys Acta Gen Subj 2016; 1860:434-44. [DOI: 10.1016/j.bbagen.2015.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 10/15/2015] [Accepted: 10/23/2015] [Indexed: 12/31/2022]
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