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Merashli M, Bucci T, Pastori D, Pignatelli P, Ames PRJ. Intima media thickness of carotid arteries in familial Mediterranean fever: a systematic review and meta-analysis. Clin Rheumatol 2022; 41:3769-3776. [PMID: 35933450 DOI: 10.1007/s10067-022-06326-5] [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: 06/14/2022] [Revised: 07/17/2022] [Accepted: 08/01/2022] [Indexed: 11/03/2022]
Abstract
AIM To perform a systematic review and meta-analysis of studies reporting data on atherosclerosis and inflammatory markers in familial Mediterranean fever (FMF). METHODS EMBASE and PubMed databases were screened according to PRISMA guidelines from inception to January 2022 for articles reporting measurements of the intima media thickness (IMT) of carotid arteries and eventually carotid plaques; random effect meta-analyses for continuous outcomes and Peto's odds ratio for rare events were employed. RESULTS The screening and selection search strategy yielded 18 case controls studies (16 full papers and 2 abstracts); the IMT was greater in FMF (n = 1112) than in controls (n = 901) (p < 0.0001) with wide heterogeneity (I2 = 86.4%); a sensitivity analysis according to mean age of participants, male to female ratio, disease duration, C-reactive protein (CRP), serum amyloid A (SAA), fibrinogen (FNG), atherogenic index of plasma (AIP), colchicine use and NOQAS revealed that the heterogeneity variance was partly explained by CRP (p = 0.01) and to a much lesser extent by the AIP (p = 0.10). The pooled prevalence of carotid plaques was greater in FMF (n = 137) than in controls (n = 156) (19% vs 8.3%, p = 0.02) with low heterogeneity. CONCLUSION FMF is characterised by premature atherosclerosis expressed as a thicker intima media and a greater prevalence of carotid plaques, partially related to the C-reactive protein, as expected by the autoinflammatory nature of FMF. Key Points • Familial Mediterranean fever is characterised by premature atherosclerosis. • C-reactive protein relates to intima media thickness in keeping with the autoinflammatory nature Familial Mediterranean fever. • Targeting the inter-critical low-grade inflammation may be relevant to minimise the additional cardiovascular risk posed by premature atherosclerosis.
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Affiliation(s)
- Mira Merashli
- Department of Rheumatology, American University of Beirut, Beirut, Lebanon
| | - Tommaso Bucci
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini", Sapienza University of Rome, Rome, Italy
| | - Daniele Pastori
- Department of Clinical, Internal, Anesthesiological & Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Pasquale Pignatelli
- Department of Clinical, Internal, Anesthesiological & Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Paul R J Ames
- Immune Response & Vascular Disease Unit, Nova University Lisbon, Rua Camara Pestana, Lisbon, Portugal.
- Department of Haematology, Dumfries Royal Infirmary, Cargenbridge, Dumfries, DG2 7AH, Scotland, UK.
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2
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de Freitas MCP, Martins Figueiredo Neto A, Damasceno NR. Nonlinear optical responses of oxidized low-density lipoprotein: Cutoff point for z-scan peak-valley distance. Photodiagnosis Photodyn Ther 2020; 30:101689. [PMID: 32087295 DOI: 10.1016/j.pdpdt.2020.101689] [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: 07/15/2019] [Revised: 01/28/2020] [Accepted: 02/18/2020] [Indexed: 11/26/2022]
Abstract
The development of new methods to assess biomarkers of cardiovascular disease is currently a subject of scientific research. This article broadens our view of nonlinear optical responses of oxidized low density lipoprotein (LDL) evaluated using the Z-scan peak-valley distance and proposes a cutoff point. We investigated the association of peak-valley distance and some cardiovascular risk factors related with sociodemographic, clinical and anthropometric profiles and plasma biomarkers such as lipid and glucose profile, apolipoprotein, lipoprotein subfractions and omega 3 fatty acids. Z-scan analysis was performed using isolated LDL after ultracentrifugation in human blood samples collected after fasting. Peak-valley distance is a parameter that decreases directly depending on the oxidizability of LDL. As peak-valley distance was associated with relevant biomarkers of cardiovascular risk, we tested cutoff points for categorization and the best results were obtained using percentile < 75 (Lowz-scan) and percentile ≥ 75 (Highz-scan). The regression logistic models tested after establishing the cutoff point for peak-valley distance showed that increased levels of plasma high-density lipoprotein cholesterol, apolipoprotein A-I, large high-density lipoprotein subfractions and docosahexaenoic acid are directly associated with HighZ-scan. Conversely, high levels of small LDL were associated with decreased odds of presenting HighZ-scan. In conclusion, the cutoff point for peak-valley distance was able to identify atherogenic characteristics of LDL and its relationship with some parameters of high-density lipoprotein functionality.
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Affiliation(s)
- Maria Camila Pruper de Freitas
- Department of Nutrition, Faculty of Public Health, University of Sao Paulo, Av. Dr. Arnaldo, 715, 01246-904, Sao Paulo, SP, Brazil.
| | | | - Nágila Raquel Damasceno
- Department of Nutrition, Faculty of Public Health, University of Sao Paulo, Av. Dr. Arnaldo, 715, 01246-904, Sao Paulo, SP, Brazil.
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3
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Garcia PRAF, Prymak O, Grasmik V, Pappert K, Wlysses W, Otubo L, Epple M, Oliveira CLP. An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver-gold nanoparticles in controlled wet-chemical reduction synthesis. NANOSCALE ADVANCES 2020; 2:225-238. [PMID: 36133991 PMCID: PMC9418936 DOI: 10.1039/c9na00569b] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/11/2019] [Indexed: 05/22/2023]
Abstract
We present a study on the formation of silver (Ag) and bimetallic silver-gold (AgAu) nanoparticles monitored by in situ SAXS as well as by ex situ TEM, XRD and UV-vis analysis in a flow reactor at controlled reaction temperature. The formation mechanism of the nanoparticles is derived from the structural parameters obtained from the experimental data. The evolution of the average particle size of pure and alloyed nanoparticles shows that the particle growth occurs initially by a coalescence mechanism. The later growth of pure silver nanoparticles is well described by Ostwald ripening and for the alloyed nanoparticles by a process with a significantly slower growth rate. Additionally, the SAXS data of pure silver nanoparticles revealed two major populations of nanoparticles, the first one with a continuous crystal growth to a saturation plateau, and the second one probably with a continuous emergence of small new crystals. The particle sizes obtained by SAXS agree well with the results from transmission electron microscopy and X-ray diffraction. The present study demonstrates the capability of an in situ investigation of synthesis processes using a laboratory based SAXS instrument. Online monitoring of the synthesis permitted a detailed investigation of the structural evolution of the system.
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Affiliation(s)
- Paulo R A F Garcia
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Wagner Wlysses
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
| | - Larissa Otubo
- Laboratório de Microscopia e Microanálises (LMM), Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP 05508-000 São Paulo - SP Brazil
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Cristiano L P Oliveira
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
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4
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Immobilization of Cholesterol Oxidase from Streptomyces Sp. on Magnetite Silicon Dioxide by Crosslinking Method for Cholesterol Oxidation. Appl Biochem Biotechnol 2020; 191:968-980. [PMID: 31950444 DOI: 10.1007/s12010-020-03241-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/08/2020] [Indexed: 12/31/2022]
Abstract
Enzymatic biosensor has been paid much attention to the research fields due to its advantage in medical application. As one of the application, we determined the optimum value of cholesterol oxidase against cholesterol. In this work, we studied the behavior of cholesterol oxidation by enzymatic reaction to get the optimum condition for cholesterol oxidation. The enzyme that used were in two form, free cholesterol oxidase, and immobilized cholesterol oxidase. Cholesterol oxidase was produced from Streptomyces sp. by using solid state fermentation method and identified had high enzyme activity to be 5.12 U/mL. Cholesterol oxidase was simultaneously crosslinked immobilized onto magnetite coated by silicon dioxide (M-SiO2). The support was characterized by Fourier transform infrared (FTIR) to determine the functional group of modified particle and scanning electron microscope (SEM) to observe the morphological or our prepared particle. Cholesterol oxidase sensitivity to substrate was analyzed by using HPLC with different interval time measurements. The oxidation of cholesterol by free enzyme and immobilized enzyme was also investigated. The best sensitivity of cholesterol oxidase was estimated to oxidize Cso (concentration of substrate) 1.46 mM of substrate with Ce (concentration of enzyme) 20 mg/mL for 180 min. Final oxidation value of cholesterol by immobilized enzyme was greater than 60%. The results of this study revealed that immobilized enzyme for cholesterol oxidation was stable, reproducible, and sensitive.
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5
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Surendran A, Zhang H, Winter T, Edel A, Aukema H, Ravandi A. Oxylipin profile of human low-density lipoprotein is dependent on its extent of oxidation. Atherosclerosis 2019; 288:101-111. [DOI: 10.1016/j.atherosclerosis.2019.07.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 07/02/2019] [Accepted: 07/17/2019] [Indexed: 11/16/2022]
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6
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Maric S, Lind TK, Raida MR, Bengtsson E, Fredrikson GN, Rogers S, Moulin M, Haertlein M, Forsyth VT, Wenk MR, Pomorski TG, Arnebrant T, Lund R, Cárdenas M. Time-resolved small-angle neutron scattering as a probe for the dynamics of lipid exchange between human lipoproteins and naturally derived membranes. Sci Rep 2019; 9:7591. [PMID: 31110185 PMCID: PMC6527577 DOI: 10.1038/s41598-019-43713-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/27/2019] [Indexed: 12/21/2022] Open
Abstract
Atherosclerosis is the main killer in the western world. Today’s clinical markers include the total level of cholesterol and high-/low-density lipoproteins, which often fails to accurately predict the disease. The relationship between the lipid exchange capacity and lipoprotein structure should explain the extent by which they release or accept lipid cargo and should relate to the risk for developing atherosclerosis. Here, small-angle neutron scattering and tailored deuteration have been used to follow the molecular lipid exchange between human lipoprotein particles and cellular membrane mimics made of natural, “neutron invisible” phosphatidylcholines. We show that lipid exchange occurs via two different processes that include lipid transfer via collision and upon direct particle tethering to the membrane, and that high-density lipoprotein excels at exchanging the human-like unsaturated phosphatidylcholine. By mapping the specific lipid content and level of glycation/oxidation, the mode of action of specific lipoproteins can now be deciphered. This information can prove important for the development of improved diagnostic tools and in the treatment of atherosclerosis.
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Affiliation(s)
- Selma Maric
- Dept. of Biomedical Science, Malmö University, Per Albin Hanssons väg 35, 205 02, Malmö, Sweden.
| | - Tania Kjellerup Lind
- Dept. of Biomedical Science, Malmö University, Per Albin Hanssons väg 35, 205 02, Malmö, Sweden
| | - Manfred Roman Raida
- Singapore Lipidomics Incubator (SLING), Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Eva Bengtsson
- Dept. of Clinical Sciences, Lund University, Jan Waldenströms gata 35, CRC, Box 50332, 212 13, Malmö, Sweden
| | - Gunilla Nordin Fredrikson
- Dept. of Clinical Sciences, Lund University, Jan Waldenströms gata 35, CRC, Box 50332, 212 13, Malmö, Sweden
| | - Sarah Rogers
- ISIS Science and Technology Facilities Council, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
| | - Martine Moulin
- Life Science Group, Institut Laue Langevin, 6, rue Jules Horowitz, BP 156, F-38042, Grenoble, Cedex 9, France
| | - Michael Haertlein
- Life Science Group, Institut Laue Langevin, 6, rue Jules Horowitz, BP 156, F-38042, Grenoble, Cedex 9, France
| | - V Trevor Forsyth
- Life Science Group, Institut Laue Langevin, 6, rue Jules Horowitz, BP 156, F-38042, Grenoble, Cedex 9, France.,Faculty of Natural Science and Institute for Science and Technology in Medicine, Keele University, Staffordshire, ST5 5BG, United Kingdom
| | - Markus R Wenk
- Singapore Lipidomics Incubator (SLING), Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Thomas Günther Pomorski
- Dept. of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark.,Dept. of Molecular Biochemistry, Ruhr University Bochum, Faculty of Chemistry and Biochemistry, 44780, Bochum, Germany
| | - Thomas Arnebrant
- Dept. of Biomedical Science, Malmö University, Per Albin Hanssons väg 35, 205 02, Malmö, Sweden
| | - Reidar Lund
- Dept. of Chemistry, University of Oslo, Blindern, 0315, Oslo, Norway
| | - Marité Cárdenas
- Dept. of Biomedical Science, Malmö University, Per Albin Hanssons väg 35, 205 02, Malmö, Sweden.
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Cors M, Wiehemeier L, Hertle Y, Feoktystov A, Cousin F, Hellweg T, Oberdisse J. Determination of Internal Density Profiles of Smart Acrylamide-Based Microgels by Small-Angle Neutron Scattering: A Multishell Reverse Monte Carlo Approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15403-15415. [PMID: 30421936 DOI: 10.1021/acs.langmuir.8b03217] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The internal structure of nanometric microgels in water has been studied as a function of temperature, cross-linker content, and level of deuteration. Small-angle neutron scattering from poly( N-isopropylmethacrylamide) (volume phase transition ≈ 44 °C) microgel particles of radius well below 100 nm in D2O has been measured. The intensities have been analyzed with a combination of polymer chain scattering and form-free radial monomer volume fraction profiles defined over spherical shells, taking polydispersity in size of the particles determined by atomic force microscopy into account. A reverse Monte Carlo optimization using a limited number of parameters was developed to obtain smoothly decaying profiles in agreement with the experimentally scattered intensities. The results are compared to the swelling curve of microgel particles in the temperature range from 15 to 55 °C obtained from photon correlation spectroscopy (PCS). In addition to hydrodynamic radii measured by PCS, our analysis provides direct information about the internal water content and gradients, the strongly varying steepness of the density profile at the particle-water interface, the total spatial extension of the particles, and the visibility of chains. The model has also been applied to a variation of the cross-linker content, N, N'-methylenebisacrylamide, from 5 to 15 mol %, providing insight on the impact of chain architecture and cross-linking on water uptake and on the definition of the polymer-water interface. The model can easily be generalized to arbitrary monomer contents and types, in particular mixtures of hydrogenated and deuterated species, paving the way to detailed studies of monomer distributions inside more complex microgels, in particular core-shell particles.
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Affiliation(s)
- Marian Cors
- Department of Physical and Biophysical Chemistry , Bielefeld University , Universitätsstr. 25 , 33615 Bielefeld , Germany
- Laboratoire Charles Coulomb (L2C) , University of Montpellier, CNRS , 34095 Montpellier , France
| | - Lars Wiehemeier
- Department of Physical and Biophysical Chemistry , Bielefeld University , Universitätsstr. 25 , 33615 Bielefeld , Germany
| | - Yvonne Hertle
- Department of Physical and Biophysical Chemistry , Bielefeld University , Universitätsstr. 25 , 33615 Bielefeld , Germany
| | - Artem Feoktystov
- Forschungszentrum Jülich GmbH , Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ , 85748 Garching , Germany
| | - Fabrice Cousin
- Laboratoire Léon Brillouin, UMR 12 CEA/CNRS , CEA Saclay, 91191 Gif Sur Yvette , France
| | - Thomas Hellweg
- Department of Physical and Biophysical Chemistry , Bielefeld University , Universitätsstr. 25 , 33615 Bielefeld , Germany
| | - Julian Oberdisse
- Laboratoire Charles Coulomb (L2C) , University of Montpellier, CNRS , 34095 Montpellier , France
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8
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Lehofer B, Golub M, Kornmueller K, Kriechbaum M, Martinez N, Nagy G, Kohlbrecher J, Amenitsch H, Peters J, Prassl R. High Hydrostatic Pressure Induces a Lipid Phase Transition and Molecular Rearrangements in Low-Density Lipoprotein Nanoparticles. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION : MEASUREMENT AND DESCRIPTION OF PARTICLE PROPERTIES AND BEHAVIOR IN POWDERS AND OTHER DISPERSE SYSTEMS 2018; 35:1800149. [PMID: 30283212 PMCID: PMC6166783 DOI: 10.1002/ppsc.201800149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Indexed: 06/08/2023]
Abstract
Low-density lipoproteins (LDL) are natural lipid transporter in human plasma whose chemically modified forms contribute to the progression of atherosclerosis and cardiovascular diseases accounting for a vast majority of deaths in westernized civilizations. For the development of new treatment strategies, it is important to have a detailed picture of LDL nanoparticles on a molecular basis. Through the combination of X-ray and neutron small-angle scattering (SAS) techniques with high hydrostatic pressure (HHP) this study describes structural features of normolipidemic, triglyceride-rich and oxidized forms of LDL. Due to the different scattering contrasts for X-rays and neutrons, information on the effects of HHP on the internal structure determined by lipid rearrangements and changes in particle shape becomes accessible. Independent pressure and temperature variations provoke a phase transition in the lipid core domain. With increasing pressure an inter-related anisotropic deformation and flattening of the particle are induced. All LDL nanoparticles maintain their structural integrity even at 3000 bar and show a reversible response toward pressure variations. The present work depicts the complementarity of pressure and temperature as independent thermodynamic parameters and introduces HHP as a tool to study molecular assembling and interaction processes in distinct lipoprotein particles in a nondestructive manner.
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Affiliation(s)
- Bernhard Lehofer
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
| | - Maksym Golub
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS + CEA, IBS, 38000 Grenoble, France
| | - Karin Kornmueller
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
| | - Manfred Kriechbaum
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Nicolas Martinez
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS + CEA, IBS, 38000 Grenoble, France
| | - Gergely Nagy
- Paul Scherrer Institut, 5232 Villigen, Switzerland; Wigner Research Centre for Physics, 1121 Budapest, Hungary; European Spallation Source ERIC, 22363 Lund, Sweden
| | | | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Judith Peters
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS, LiPhy, 38000 Grenoble, France
| | - Ruth Prassl
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
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Effects of enzymes on elastic modulus of low-density lipoproteins were investigated using atomic force microscopy. Biochem Biophys Res Commun 2018; 501:607-611. [PMID: 29709480 DOI: 10.1016/j.bbrc.2018.04.211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 04/26/2018] [Indexed: 11/23/2022]
Abstract
Oxidation of low-density lipoproteins (LDLs) induces development of cardiovascular disease. Recently, reports of studies using atomic force microscopy (AFM) have described that the elastic modulus of metal-induced oxidized LDLs is lower than the modulus before oxidation. However, the mechanisms of change of the elastic modulus have not been well investigated. We postulated that disorder of the LDL structure might decrease the elastic modulus. This study measured the elastic modulus of LDLs before and after enzyme treatment with V8 protease, α-chymotrypsin, and phospholipase A2. After LDLs were obtained from serum by ultracentrifugation, LDLs or enzyme-treated LDLs were physically absorbed. They were crowded on a mica surface. Although V8 protease and α-chymotrypsin did not induce the elastic modulus change, treatment with PLA2 decreased the elastic modulus. The LDL particle size did not change during the enzyme treatment. Results suggest that disordering of the lipid structure of the LDL might contribute to the elastic modulus change. Results show that AFM might be a useful tool to evaluate disorders of complex nanoscale particle structures from lipids and proteins such as lipoproteins.
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Pelin JNBD, Gatto E, Venanzi M, Cavalieri F, Oliveira CLP, Martinho H, Silva ER, Aguilar AM, Souza JS, Alves WA. Hybrid Conjugates Formed between Gold Nanoparticles and an Amyloidogenic Diphenylalanine-Cysteine Peptide. ChemistrySelect 2018. [DOI: 10.1002/slct.201801345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Juliane N. B. D. Pelin
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-580 Santo André Brazil
| | - Emanuela Gatto
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Italy
| | - Mariano Venanzi
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Italy
| | - Francesca Cavalieri
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Australia
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Italy
| | | | - Herculano Martinho
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-580 Santo André Brazil
| | - Emerson R. Silva
- Departamento de Biofísica; Universidade Federal de São Paulo; 04023-062 São Paulo Brazil
| | - Andrea M. Aguilar
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas; Universidade Federal de São Paulo; Diadema 09972-270 Brazil
| | - Juliana S. Souza
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-580 Santo André Brazil
| | - Wendel A. Alves
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-580 Santo André Brazil
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11
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Natural low- and high-density lipoproteins as mighty bio-nanocarriers for anticancer drug delivery. Cancer Chemother Pharmacol 2018; 82:371-382. [DOI: 10.1007/s00280-018-3626-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/12/2018] [Indexed: 02/07/2023]
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12
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Oxidized LDL triggers changes in oxidative stress and inflammatory biomarkers in human macrophages. Redox Biol 2017; 15:1-11. [PMID: 29195136 PMCID: PMC5723280 DOI: 10.1016/j.redox.2017.11.017] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/01/2017] [Accepted: 11/18/2017] [Indexed: 12/24/2022] Open
Abstract
Oxidized low-density lipoprotein (oxLDL) is a well-recognized proatherogenic particle that functions in atherosclerosis. In this study, we established conditions to generate human oxLDL, characterized according to the grade of lipid and protein oxidation, particle size and oxylipin content. The induction effect of the cellular proatherogenic response was assessed in foam cells by using an oxLDL-macrophage interaction model. Uptake of oxLDL, reactive oxygen species production and expression of oxLDL receptors (CD36, SR-A and LOX-1) were significantly increased in THP-1 macrophages. Analyses of 35 oxylipins revealed that isoprostanes (IsoP) and prostaglandins (PGs) derived from the oxidation of arachidonic, dihomo gamma-linolenic and eicosapentaenoic acids were strongly and significantly induced in macrophages stimulated with oxLDL. Importantly, the main metabolites responsible for the THP1-macrophage response to oxLDL exposure were the oxidative stress markers 5-epi-5-F2t-IsoP, 15-E1t-IsoP, 8-F3t-IsoP and 15-keto-15-F2t-IsoP as well as inflammatory markers PGDM, 17-trans-PGF3α, and 11β-PGF2α, all of which are reported here, for the first time, to function in the interaction of oxLDL with THP-1 macrophages. By contrast, a salvage pathway mediated by anti-inflammatory PGs (PGE1 and 17-trans-PGF3α) was also identified, suggesting a response to oxLDL-induced injury. In conclusion, when THP-1 macrophages were treated with oxLDL, a specific induction of biomarkers related to oxidative stress and inflammation was triggered. This work contributes to our understanding of initial atherogenic events mediated by oxLDL-macrophage interactions and helps to generate new approaches for their modulation. OxLDL has a potent impact on the oxylipin profiles in THP-1 human macrophages. OxLDL induces biomarkers of oxidation and inflammation in THP-1 human macrophages. Human Macrophages produce anti-inflammatory prostaglandins after oxLDL exposure.
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13
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Sicchieri LB, Monteiro AM, Figueiredo Neto AM, Gomes L, Courrol LC. Optical Properties of Europium Tetracycline Complexes in the Presence of High-Density Lipoproteins (HDL) Subfractions. APPLIED SPECTROSCOPY 2017; 71:1560-1567. [PMID: 27956595 DOI: 10.1177/0003702816683685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Standard lipoprotein measurements of triglycerides, total cholesterol, low-density lipoproteins (LDL), and high-density lipoproteins (HDL) fail to identify many lipoprotein abnormalities that contribute to cardiovascular heart diseases (CHD). Studies suggested that the presence of CHD is more strongly associated with the HDL subspecies than with total HDL cholesterol levels. The HDL particles can be collected in at least three subfractions, the HDL2b, HDL2a, and HDL3. More specifically, atherosclerosis is associated with low levels of HDL2. In this work, the optical spectroscopic properties of europium tetracycline (EuTc) complex in the presence of different HDL subspecies was studied. The results show that the europium spectroscopic properties in the EuTc complex are influenced by sizes and concentrations of subclasses. Eu3+ emission intensity and lifetime can discriminate the subfractions HDL3 and HDL2b.
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Affiliation(s)
| | | | | | - Laércio Gomes
- 1 Centro de Lasers e Aplicações, IPEN/CNEN, São Paulo, SP, Brazil
| | - Lilia Coronato Courrol
- 1 Centro de Lasers e Aplicações, IPEN/CNEN, São Paulo, SP, Brazil
- 3 Depto de Ciências Exatas e da Terra, Universidade Federal de São Paulo (Brazil), Diadema, SP, Brazil
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Golub M, Lehofer B, Martinez N, Ollivier J, Kohlbrecher J, Prassl R, Peters J. High hydrostatic pressure specifically affects molecular dynamics and shape of low-density lipoprotein particles. Sci Rep 2017; 7:46034. [PMID: 28382948 PMCID: PMC5382586 DOI: 10.1038/srep46034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/08/2017] [Indexed: 12/12/2022] Open
Abstract
Lipid composition of human low-density lipoprotein (LDL) and its physicochemical characteristics are relevant for proper functioning of lipid transport in the blood circulation. To explore dynamical and structural features of LDL particles with either a normal or a triglyceride-rich lipid composition we combined coherent and incoherent neutron scattering methods. The investigations were carried out under high hydrostatic pressure (HHP), which is a versatile tool to study the physicochemical behavior of biomolecules in solution at a molecular level. Within both neutron techniques we applied HHP to probe the shape and degree of freedom of the possible motions (within the time windows of 15 and 100 ps) and consequently the flexibility of LDL particles. We found that HHP does not change the types of motion in LDL, but influences the portion of motions participating. Contrary to our assumption that lipoprotein particles, like membranes, are highly sensitive to pressure we determined that LDL copes surprisingly well with high pressure conditions, although the lipid composition, particularly the triglyceride content of the particles, impacts the molecular dynamics and shape arrangement of LDL under pressure.
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Affiliation(s)
- M. Golub
- Univ. Grenoble Alpes, IBS, Grenoble, F-38000, France
- Institut Laue Langevin, Grenoble, F-38000, France
| | - B. Lehofer
- Institute of Biophysics, Medical University of Graz, Graz, A-8010, Austria
| | - N. Martinez
- Univ. Grenoble Alpes, IBS, Grenoble, F-38000, France
- Institut Laue Langevin, Grenoble, F-38000, France
| | - J. Ollivier
- Institut Laue Langevin, Grenoble, F-38000, France
| | | | - R. Prassl
- Institute of Biophysics, Medical University of Graz, Graz, A-8010, Austria
| | - J. Peters
- Institut Laue Langevin, Grenoble, F-38000, France
- Univ. Grenoble Alpes, LiPhy, Grenoble, F-38044, France
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Maric S, Lind TK, Lyngsø J, Cárdenas M, Pedersen JS. Modeling Small-Angle X-ray Scattering Data for Low-Density Lipoproteins: Insights into the Fatty Core Packing and Phase Transition. ACS NANO 2017; 11:1080-1090. [PMID: 28048943 DOI: 10.1021/acsnano.6b08089] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Atherosclerosis and its clinical consequences are the leading cause of death in the western hemisphere. While many studies throughout the last decades have aimed at understanding the disease, the clinical markers in use today still fail to accurately predict the risks. The role of the current main clinical indicator, low density lipoprotein (LDL), in depositing fat to the vessel wall is believed to be the onset of the process. However, many subfractions of the LDL, which differ both in structure and composition, are present in the blood and among different individuals. Understanding the relationship between LDL structure and composition is key to unravel the specific role of various LDL components in the development and/or prevention of atherosclerosis. Here, we describe a model for analyzing small-angle X-ray scattering data for rapid and robust structure determination for the LDL. The model not only gives the overall structure but also the particular internal layering of the fats inside the LDL core. Thus, the melting of the LDL can be followed in situ as a function of temperature for samples extracted from healthy human patients and purified using a double protocol based on ultracentrifugation and size-exclusion chromatography. The model provides information on: (i) the particle-specific melting temperature of the core lipids, (ii) the structural organization of the core fats inside the LDL, (iii) the overall shape of the particle, and (iv) the flexibility and overall conformation of the outer protein/hydrophilic layer at a given temperature as governed by the organization of the core. The advantage of this method over other techniques such as cryo-TEM is the possibility of in situ experiments under near-physiological conditions which can be performed relatively fast (minutes at home source, seconds at synchrotron). This approach now allows the monitoring of structural changes in the LDL upon different stresses from the environment, such as changes in temperature, oxidation, or external agents used or currently in development against atherosclerotic plaque build-up and which are targeting the LDL.
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Affiliation(s)
- Selma Maric
- Biofilms- Research Center for Biointerfaces, Dept. of Biomedical Science, Faculty of Health and Society, Malmö University , Malmö 20506, Sweden
| | - Tania Kjellerup Lind
- Biofilms- Research Center for Biointerfaces, Dept. of Biomedical Science, Faculty of Health and Society, Malmö University , Malmö 20506, Sweden
| | - Jeppe Lyngsø
- Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University , 8000 Aarhus, Denmark
| | - Marité Cárdenas
- Biofilms- Research Center for Biointerfaces, Dept. of Biomedical Science, Faculty of Health and Society, Malmö University , Malmö 20506, Sweden
| | - Jan Skov Pedersen
- Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University , 8000 Aarhus, Denmark
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Abstract
The one-dimensional density distribution for symmetrical scatterers is estimated from small-angle scattering data. The symmetry of the scatterers may be one dimensional (lamellar), two dimensional (cylindrical) or three dimensional (spherical). Previously this problem has been treated either by a two-step approach with the distance distribution as an intermediate [Glatter (1981).J. Appl. Cryst.14, 101–108] or in a single step using spherical harmonics [Svergun, Feigin & Schedrin (1982).Acta Cryst.A38, 827–835]. A combination of these two methods is presented here, where the density distribution is estimated using constraints without the explicit use of an intermediate distribution. A maximum entropy constraint is introduced for this problem and the results are compared with the results of the conventional smoothness constraint. Bayesian methods are used for estimation of the overall noise level of the experimental data and for the maximum dimension of the density distribution. The method described is tested on both simulated and experimental data and shown to provide reliable estimates for the Guinier radius and maximum dimension. In both cases the effects of minor deviations from the assumed symmetry as well as incorrect background subtraction are studied.
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17
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Takeda S, Subagyo A, Hui SP, Fuda H, Shrestha R, Sueoka K, Chiba H. Elastic modulus of low-density lipoprotein as potential indicator of its oxidation. Ann Clin Biochem 2015; 52:647-53. [PMID: 25887969 DOI: 10.1177/0004563215584958] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2015] [Indexed: 11/15/2022]
Abstract
BACKGROUND Evaluation of low-density lipoprotein oxidation is important in the risk assessment of cardiovascular disease. Atomic force microscope is widely used to evaluate the physical properties including stiffness on a single-particle scale. In this study, the effect of low-density lipoprotein oxidation on the low-density lipoprotein stiffness was investigated using an atomic force microscope. METHODS Isolated low-density lipoprotein particles with or without oxidation were densely bound to an Au substrate on mica, and then pressed and deformed by the atomic force microscope tip. The stiffness of each low-density lipoprotein particle was estimated as the elastic modulus obtained by the force curve analysis. Biochemical change of low-density lipoprotein due to oxidation was studied by electrophoresis. RESULTS AND CONCLUSION The elastic modulus of low-density lipoprotein particles ranged between 0.1 and 2 MPa. The oxidation of low-density lipoprotein increased the number of low-density lipoprotein particles with smaller elastic moduli, indicating the decrease in low-density lipoprotein stiffness. The elastic modulus of low-density lipoprotein might be potentially useful to evaluate low-density lipoprotein oxidation.
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Affiliation(s)
- Seiji Takeda
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Agus Subagyo
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
| | - Shu-Ping Hui
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Hirotoshi Fuda
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Rojeet Shrestha
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Kazuhisa Sueoka
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
| | - Hitoshi Chiba
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
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