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Escalona-Rodriguez FA, Cruz-Leal Y, La O-Bonet J, Pérez-Erviti JA, Valdés-Tresanco ME, Rivero-Hernández AL, Sifontes-Niebla M, Manso-Vargas A, Sánchez B, Alvarez C, Barbosa LRS, Itri R, Lanio ME. Unveiling Sticholysin II and plasmid DNA interaction: Implications for developing non-viral vectors. Toxicon 2024; 238:107571. [PMID: 38141971 DOI: 10.1016/j.toxicon.2023.107571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/25/2023]
Abstract
Non-viral gene delivery systems offer significant potential for gene therapy due to their versatility, safety, and cost advantages over viral vectors. However, their effectiveness can be hindered by the challenge of efficiently releasing the genetic cargo from endosomes to prevent degradation in lysosomes. To overcome this obstacle, functional components can be incorporated into these systems. Sticholysin II (StII) is one of the pore-forming proteins derived from the sea anemone Stichodactyla helianthus, known for its high ability to permeabilize cellular and model membranes. In this study, we aimed to investigate the interaction between StII, and a model plasmid (pDNA) as an initial step towards designing an improved vector with enhanced endosomal escape capability. The electrophoretic mobility shift assay (EMSA) confirmed the formation of complexes between StII and pDNA. Computational predictions identified specific residues involved in the StII-DNA interaction interface, highlighting the importance of electrostatic interactions and hydrogen bonds in mediating the binding. Atomic force microscopy (AFM) of StII-pDNA complexes revealed the presence of nodular fiber and toroid shapes. These complexes were found to have a predominantly micrometer size, as confirmed by dynamic light scattering (DLS) measurements. Despite increase in the overall charge, the complexes formed at the evaluated nitrogen-to-phosphorus (N/P) ratios still maintained a negative charge. Moreover, StII retained its pore-forming capacity regardless of its binding to the complexes. These findings suggest that the potential ability of StII to permeabilize endosomal membranes could be largely maintained when combined with nucleic acid delivery systems. Additionally, the still remaining negative charge of the complexes would enable the association of another positively charged component to compact pDNA. However, to minimize non-specific cytotoxic effects, it is advisable to explore methods to regulate the protein's activity in response to the microenvironment.
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Affiliation(s)
- Felipe A Escalona-Rodriguez
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Yoelys Cruz-Leal
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba.
| | - Javier La O-Bonet
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Julio A Pérez-Erviti
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba.
| | - Mario Ernesto Valdés-Tresanco
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba.
| | - Ada L Rivero-Hernández
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Maricary Sifontes-Niebla
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Alexis Manso-Vargas
- Immunology and Immunotherapy Direction, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Belinda Sánchez
- Immunology and Immunotherapy Direction, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Carlos Alvarez
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
| | - Leandro R S Barbosa
- Institute of Physics, University of São Paulo, São Paulo, 05508-090, Brazil; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, 13083-100, SP, Brazil.
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo, 05508-090, Brazil.
| | - María E Lanio
- Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25th Street, Corner to J Street, Square of Revolution, Havana, 10400, Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, Corner to 15 Street, Playa, Havana, 11600, Cuba.
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Mathews PD, Gama GS, Megiati HM, Madrid RRM, Garcia BBM, Han SW, Itri R, Mertins O. Flavonoid-Labeled Biopolymer in the Structure of Lipid Membranes to Improve the Applicability of Antioxidant Nanovesicles. Pharmaceutics 2024; 16:141. [PMID: 38276511 PMCID: PMC10819309 DOI: 10.3390/pharmaceutics16010141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024] Open
Abstract
Nanovesicles produced with lipids and polymers are promising devices for drug and bioactive delivery and are of great interest in pharmaceutical applications. These nanovesicles can be engineered for improvement in bioavailability, patient compliance or to provide modified release or enhanced delivery. However, their applicability strongly depends on the safety and low immunogenicity of the components. Despite this, the use of unsaturated lipids in nanovesicles, which degrade following oxidation processes during storage and especially during the proper routes of administration in the human body, may yield toxic degradation products. In this study, we used a biopolymer (chitosan) labeled with flavonoid (catechin) as a component over a lipid bilayer for micro- and nanovesicles and characterized the structure of these vesicles in oxidation media. The purpose of this was to evaluate the in situ effect of the antioxidant in three different vesicular systems of medium, low and high membrane curvature. Liposomes and giant vesicles were produced with the phospholipids DOPC and POPC, and crystalline cubic phase with monoolein/DOPC. Concentrations of chitosan-catechin (CHCa) were included in all the vesicles and they were challenged in oxidant media. The cytotoxicity analysis using the MTT assay (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide) revealed that concentrations of CHCa below 6.67 µM are non-toxic to HeLa cells. The size and zeta potential of the liposomes evidenced the degradation of their structures, which was minimized by CHCa. Similarly, the membrane of the giant vesicle, which rapidly deteriorated in oxidative solution, was protected in the presence of CHCa. The production of a lipid/CHCa composite cubic phase revealed a specific cubic topology in small-angle X-ray scattering, which was preserved in strong oxidative media. This study demonstrates the specific physicochemical characteristics introduced in the vesicular systems related to the antioxidant CHCa biopolymer, representing a platform for the improvement of composite nanovesicle applicability.
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Affiliation(s)
- Patrick D. Mathews
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
- Institute of Biosciences, Sao Paulo State University, Botucatu 18618-689, Brazil
| | - Gabriella S. Gama
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Hector M. Megiati
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Rafael R. M. Madrid
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Bianca B. M. Garcia
- Interdisciplinary Center for Gene Therapy, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (B.B.M.G.); (S.W.H.)
| | - Sang W. Han
- Interdisciplinary Center for Gene Therapy, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (B.B.M.G.); (S.W.H.)
| | - Rosangela Itri
- Applied Physics Department, Institute of Physics, University of Sao Paulo, Sao Paulo 05508-900, Brazil;
| | - Omar Mertins
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
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Spinozzi F, Barbosa LRS, Corucci G, Mariani P, Itri R. Small-angle scattering from flat bilayers containing correlated scattering length density inhomogeneities. J Appl Crystallogr 2023; 56:1348-1360. [PMID: 37791360 PMCID: PMC10543680 DOI: 10.1107/s1600576723006143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/12/2023] [Indexed: 10/05/2023] Open
Abstract
Model lipid bilayers have been widely employed as a minimal system to investigate the structural properties of biological membranes by small-angle X-ray (SAXS) and neutron scattering (SANS) techniques. These have nanometre resolution and can give information regarding membrane thickness and scattering length densities (SLDs) of polar and apolar regions. However, biological membranes are complex systems containing different lipids and protein species, in which lipid domains can be dynamically assembled and disassembled. Therefore, SLD variations can occur within the biomembrane. In this work, a novel method has been developed to simulate SAXS and SANS profiles obtained from large unilamellar vesicles containing SLD inhomogeneities that are spatially correlated over the membrane surface. Such inhomogeneities are represented by cylindrical entities with equivalent SLDs. Stacking of bilayers is also included in the model, with no correlation between horizontal and vertical order. The model is applied to a lipid bilayer containing SLD inhomogeneities representing pores, lipid domains, and transmembrane, partially immersed and anchored proteins. It is demonstrated that all the structural information from the host lipid bilayer and from the SLD inhomogeneity can be consistently retrieved by a combined analysis of experimental SAXS and SANS data through the methodology proposed here.
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Affiliation(s)
- Francesco Spinozzi
- Department of Life and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Leandro R. S. Barbosa
- Institute of Physics, University of São Paulo, São Paulo, Brazil
- Brazilian Synchrotron Light Laboratory (LNLS), Campinas, São Paulo, Brazil
| | - Giacomo Corucci
- Institut Laue–Langevin, Grenoble, France
- École Doctorale de Physique, Université Grenoble Alpes, Saint-Martin-d’Héres, France
| | - Paolo Mariani
- Department of Life and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo, Brazil
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Pepe A, Moretti P, Yoneda JS, Carducci F, Itri R, Mariani P. Self-oriented anisotropic structure of G-hydrogels as a delicate balance between attractive and repulsive forces. Nanoscale 2023; 15:15196-15205. [PMID: 37624640 DOI: 10.1039/d3nr01348k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
Guanine (G) hydrogels are very attractive materials made by the supramolecular organization of G-derivatives in water. In this paper, hydrogels composed of guanosine 5'-monophosphate (GMP) and guanosine (Gua), that make long, flexible and knotted G-quadruplexes, were investigated by small- and wide-angle X-ray scattering (SAXS and WAXS) to comprehend the origin of their unique orientational properties. The SAXS intensity, analysed at a fixed scattering vector modulus Q as a function of polar angle, allowed us to derive the Maier-Saupe orientation parameter m. The strong dependence of m on hydrogel composition and temperature demonstrated that the preferred orientation is controlled by the quadruplex surface charge and flexibility. Indeed, a possible correlation between the orientation parameter m and the quadruplex-to-quadruplex lateral interactions was explored. Results confirmed that the balance between attractive and repulsive interactions plays a main role in the orientational anisotropy: quadruplex clusters lose their orientational properties when attractive interactions decrease. The key role of the number of negative charges per unit length of the G-quadruplex filaments was confirmed by Atomic Force Microscopy (AFM) observations. Indeed, directionality histograms showed that in the presence of a large amount of Gua, G-quadruplexes follow preferential orientations other than those related to the strong interactions with the K+ pattern on the mica surface. The fact that lateral quadruplex-to-quadruplex interactions, even in the presence of external (opposing) forces, can tune the hydrogel alignment in a given preferred direction provides novel possibilities for scaffold/3D printing applications.
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Affiliation(s)
- Alessia Pepe
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
| | - Paolo Moretti
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
| | - Juliana S Yoneda
- Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo, Brazil
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Federica Carducci
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
| | - Rosangela Itri
- Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo, Brazil
| | - Paolo Mariani
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
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Tanouye FT, Alves JR, Spinozzi F, Itri R. Unveiling protein-protein interaction potential through Monte Carlo simulation combined with small-angle X-ray scattering. Int J Biol Macromol 2023; 248:125869. [PMID: 37473888 DOI: 10.1016/j.ijbiomac.2023.125869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 07/06/2023] [Accepted: 07/15/2023] [Indexed: 07/22/2023]
Abstract
Protein interactions are investigated under different conditions of lysozyme concentration, temperature and ionic strength by means of in-solution small angle X-Ray scattering (SAXS) experiments and Monte Carlo (MC) simulations. Initially, experimental data were analysed through a Hard-Sphere Double Yukawa (HSDY) model combined with Random Phase Approximation (RPA), a closure relationship commonly used in the literature for monodisperse systems. We realized by means of MC that the HSDY/RPA modelling fails to describe the protein-protein pair potential for moderated and dense systems at low ionic strength, mainly due to inherent distortions of the RPA approximation. Our SAXS/MC results thus show that lysozyme concentrations between 2 (diluted) and 20 mg/mL (not crowded) present similar protein-protein pair potential preserving the values of surface net charge around 7 e, protein diameter of 28 Å, decay range of attractive well potential of 3 Å and a depth of the well potential varying from 1 to 5 kBT depending on temperature and salt addition. Noteworthy, we here propose a novel method to analyse the SAXS data from interacting proteins through MC simulations, which overcomes the deficiencies presented by the use of a closure relationship. Furthermore, this new methodology of combining SAXS with MC simulations gives a step forward to investigate more complex systems as those composed of a mixture of proteins of distinct species presenting different molecular weights (and hence sizes) and surface net charges at low, moderate and very dense systems.
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Affiliation(s)
| | | | - Francesco Spinozzi
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Italy
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Peluffo RD, del V. Alonso S, Itri R, Flecha FLG, Barbosa L. Biophysical Reviews (ISSUE 4 2023): LAFeBS-highlighting biophysics in Latin America. Biophys Rev 2023; 15:419-423. [PMID: 37681087 PMCID: PMC10480114 DOI: 10.1007/s12551-023-01117-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2023] [Indexed: 09/09/2023] Open
Affiliation(s)
- R. Daniel Peluffo
- Group of Biophysical Chemistry, Department of Biological Sciences, CENUR Litoral Norte, Universidad de la República, Salto, Uruguay
| | - Silvia del V. Alonso
- Departamento de Ciencia y Tecnología, Laboratorio de Bio-Nanotecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
- Grupo de Biología Estructural y Biotecnología (GBEyB), IMBICE (CONICET CCT-La Plata), Buenos Aires, Argentina
| | - Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
| | - F. Luis González Flecha
- Laboratorio de Biofísica Molecular, Universidad de Buenos Aires - CONICET, Instituto de Química y Fisicoquímica Biológicas, Buenos Aires, Argentina
| | - Leandro Barbosa
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo, Brazil
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Alonso SDV, Itri R, Barbosa LRS, Peluffo RD, González Flecha FL. The Latin American Federation of Biophysical Societies (LAFeBS). Biophys Rev 2023; 15:425-429. [PMID: 37681111 PMCID: PMC10480359 DOI: 10.1007/s12551-023-01119-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 08/14/2023] [Indexed: 09/09/2023] Open
Abstract
The Latin American Federation of Biophysical Societies (LAFeBS) was constituted in 2007 in Montevideo, Uruguay, as a collaborative effort among the Biophysical Societies of Argentina, Brazil, and Uruguay. This visionary collaboration foresees the future of Biophysics in Latin America. In this commentary, we will briefly review the history of LAFeBS, the remarkable path undertaken since its foundation 16 years ago, and its key initiative, the Latin American Postgraduate Program in Biophysics (POSLATAM).
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Affiliation(s)
- Silvia del Valle Alonso
- Departamento de Ciencia y Tecnología, Laboratorio de Bio-Nanotecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires Argentina
- Grupo de Biología Estructural y Biotecnología (GBEyB), IMBICE (CONICET CCT-La Plata), Buenos Aires, Argentina
| | - Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
| | - Leandro R. S. Barbosa
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP Brazil
| | - R. Daniel Peluffo
- Group of Biophysical Chemistry, Department of Biological Sciences, CENUR Litoral Norte, Universidad de la República, Salto, Uruguay
| | - F. Luis González Flecha
- Laboratorio de Biofísica Molecular, Instituto de Química y Fisicoquímica Biológicas, Universidad de Buenos Aires - CONICET, Buenos Aires, Argentina
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Scanavachi G, Kinoshita K, Tsubone TM, Itri R. Dynamic photodamage of red blood cell induced by CisDiMPyP porphyrin. J Photochem Photobiol B 2023; 245:112754. [PMID: 37451154 DOI: 10.1016/j.jphotobiol.2023.112754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 06/18/2023] [Accepted: 07/02/2023] [Indexed: 07/18/2023]
Abstract
It is well-known that oxidative damage in red blood cell (RBC) usually causes morphological changes and increased membrane rigidity. Although many studies have focused on investigating how RBC responds to a photodynamic stimulus, the intermediate steps between membrane damage and hemolysis are not reported. To give a comprehensive insight into changes of RBC membrane property under different oxidative damage levels, we employed the photoactivation of CisDiMPyP porphyrin that primarily generates singlet oxygen 1O2 as oxidant species. We found that there were distinguishable characteristic damages depending on the 1O2 flux over the membrane, in a way that each impact of photooxidative damage was categorized under three damage levels: mild (maintaining the membrane morphology and elasticity), moderate (membrane elongation and increased membrane elasticity) and severe (wrinkle-like deformation and hemolysis). When sodium azide (NaN3) was used as a singlet oxygen quencher, delayed cell membrane alterations and hemolysis were detected. The delay times showed that 1O2 indeed plays a key role that causes RBC photooxidation by CisDiMPyP. We suggest that the sequence of morphological changes (RBC discoid area expansion, wrinkle-like patterns, and hemolysis) under photooxidative damage occurs due to damage to the lipid membrane and cytoskeletal network proteins.
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Affiliation(s)
- Gustavo Scanavachi
- Institute of Physics, University of São Paulo, São Paulo, Brazil; Department of Cell Biology, Harvard Medical School, Program in Cellular and Molecular Medicine (PCMM), Boston Children's Hospital, Boston, MA 02115, United States
| | - Koji Kinoshita
- Institute of Physics, University of São Paulo, São Paulo, Brazil; Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Department of Biological Chemistry and Molecular Pharmacology (BCMP), Harvard Medical School, Program in Cellular and Molecular Medicine (PCMM), Boston Children's Hospital, Boston, MA 02115, United States.
| | - Tayana M Tsubone
- Institute of Physics, University of São Paulo, São Paulo, Brazil; Institute of Chemistry, Federal University of Uberlandia, Minas Gerais, Brazil
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo, Brazil.
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Furtado LM, Yee M, Fernandes R, Valera TS, Itri R, Petri DFS. Rheological and mechanical properties of hydroxypropyl methylcellulose-based hydrogels and cryogels controlled by AOT and SDS micelles. J Colloid Interface Sci 2023; 648:604-615. [PMID: 37315482 DOI: 10.1016/j.jcis.2023.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/24/2023] [Accepted: 06/04/2023] [Indexed: 06/16/2023]
Abstract
HYPOTHESIS The type and concentration of surfactants affect the rheological behavior of hydroxypropyl methylcellulose (HPMC) chains in hydrogels, influencing the microstructure and mechanical properties of HPMC cryogels. EXPERIMENTS Hydrogels and cryogels containing HPMC, AOT (bis (2-ethylhexyl) sodium sulfosuccinate or dioctyl sulfosuccinate salt sodium, two C8 chains and sulfosuccinate head group), SDS (sodium dodecyl sulfate, one C12 chain and sulfate head group), and sodium sulfate (salt, no hydrophobic chain) at different concentrations were investigated using small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), rheological measurements, and compressive tests. FINDINGS SDS micelles bound to the HPMC chains building "bead necklaces", increasing considerably the storage modulus G' values of the hydrogels and the compressive modulus E values of the corresponding cryogels. The dangling SDS micelles promoted multiple junction points among the HPMC chains. AOT micelles and HPMC chains did not form "bead necklaces". Although AOT increased the G' values of the hydrogels, the resulting cryogels were softer than pure HPMC cryogels. The AOT micelles are probably embedded between HPMC chains. The AOT short double chains rendered softness and low friction to the cryogel cell walls. Therefore, this work demonstrated that the structure of the surfactant tail can tune the rheological behavior of HPMC hydrogels and hence the microstructure of the resulting cryogels.
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Affiliation(s)
- Laíse M Furtado
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, Brazil.
| | - Marcio Yee
- Marine Science Department, Federal University of São Paulo, R. Dr. Carvalho de Mendonça, 144, CEP 11070-100, Santos, SP, Brazil.
| | - Rodrigo Fernandes
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil.
| | - Ticiane S Valera
- Metallurgical and Materials Engineering Department, Polytechnic School, University of São Paulo, Av. Prof. Mello Moraes, 2463, CEP 05508-030, São Paulo, SP, Brazil.
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil.
| | - Denise F S Petri
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, Brazil.
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Peluffo RD, del V. Alonso S, Itri R, Flecha FLG, Barbosa LRS. Biophysical Reviews special issue call: LAFeBS-highlighting biophysics in Latin America. Biophys Rev 2022; 14:1083-1084. [PMID: 36345275 PMCID: PMC9636340 DOI: 10.1007/s12551-022-00996-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2022] [Indexed: 10/14/2022] Open
Abstract
This Commentary describes a call for contributions to an upcoming Special Issue (SI) of Biophysical Reviews on the Latin American Federation of Biophysical Societies (LAFeBS). It details the reason for the SI, the SI Editors contact information and the relevant submission details for those wishing to contribute.
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Affiliation(s)
- R. Daniel Peluffo
- Group of Biophysical Chemistry, Department of Biological Sciences, CENUR Litoral Norte, Universidad de la República, Salto, Uruguay
| | - Silvia del V. Alonso
- Departamento de Ciencia y Tecnología, Laboratorio de Bio-Nanotecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires Argentina
- Grupo de Biología Estructural y Biotecnología (GBEyB), IMBICE (CONICET CCT-La Plata), Buenos Aires, Argentina
| | - Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
| | - F. Luis González Flecha
- Laboratorio de Biofísica Molecular, Instituto de Química y Fisicoquímica Biológicas, Universidad de Buenos Aires - CONICET, Buenos Aires, Argentina
| | - Leandro R. S. Barbosa
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP 05508-090 Brazil
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP Brazil
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Firsov AM, Franco MSF, Chistyakov DV, Goriainov SV, Sergeeva MG, Kotova EA, Fomich MA, Bekish AV, Sharko OL, Shmanai VV, Itri R, Baptista MS, Antonenko YN, Shchepinov MS. Deuterated polyunsaturated fatty acids inhibit photoirradiation-induced lipid peroxidation in lipid bilayers. J Photochem Photobiol B 2022; 229:112425. [PMID: 35276579 DOI: 10.1016/j.jphotobiol.2022.112425] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/17/2022] [Accepted: 02/26/2022] [Indexed: 12/24/2022]
Abstract
Lipid peroxidation (LPO) plays a key role in many age-related neurodegenerative conditions and other disorders. Light irradiation can initiate LPO through various mechanisms and is of importance in retinal and dermatological pathologies. The introduction of deuterated polyunsaturated fatty acids (D-PUFA) into membrane lipids is a promising approach for protection against LPO. Here, we report the protective effects of D-PUFA against the photodynamically induced LPO, using illumination in the presence of the photosensitizer trisulfonated aluminum phthalocyanine (AlPcS3) in liposomes and giant unilamellar vesicles (GUV), as assessed in four experimental models: 1) sulforhodamine B leakage from liposomes, detected with fluorescence correlation spectroscopy (FCS); 2) formation of diene conjugates in liposomal membranes, measured by absorbance at 234 nm; 3) membrane leakage in GUV assessed by optical phase-contrast intensity observations; 4) UPLC-MS/MS method to detect oxidized linoleic acid (Lin)-derived metabolites. Specifically, in liposomes or GUV containing H-PUFA (dilinoleyl-sn-glycero-3-phosphatidylcholine), light irradiation led to an extensive oxidative damage to bilayers. By contrast, no damage was observed in lipid bilayers containing 20% or more D-PUFA (D2-Lin or D10-docosahexanenoic acid). Remarkably, addition of tocopherol increased the dye leakage from liposomes in H-PUFA bilayers compared to photoirradiation alone, signifying tocopherol's pro-oxidant properties. However, in the presence of D-PUFA the opposite effect was observed, whereby adding tocopherol increased the resistance to LPO. These findings suggest a method to augment the protective effects of D-PUFA, which are currently undergoing clinical trials in several neurological and retinal diseases that involve LPO.
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Affiliation(s)
- A M Firsov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - M S F Franco
- Biochemistry Department, Institute of Chemistry, University of São Paulo (IQUSP), AV. Professor Lineu Prestes avenue, 748, USP, CEP: 05508-000 São Paulo, Brazil
| | - D V Chistyakov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - S V Goriainov
- SREC PFUR Peoples' Friendship University of Russia, Moscow, Russia
| | - M G Sergeeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - E A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - M A Fomich
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - A V Bekish
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - O L Sharko
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - V V Shmanai
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - R Itri
- Applied Physics Department, Institute of Physics, University of São Paulo, Rua do Matão, 1371 (217-B.Jafet), Butantã, USP, 05508-090 São Paulo, Brazil
| | - M S Baptista
- Biochemistry Department, Institute of Chemistry, University of São Paulo (IQUSP), AV. Professor Lineu Prestes avenue, 748, USP, CEP: 05508-000 São Paulo, Brazil.
| | - Y N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
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12
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Itri R, Baptista M, Costa-Filho AJ, Garratt RC. A special issue of Biophysical Reviews dedicated to the 20th IUPAB (virtual) Congress "in" Foz do Iguaçu. Biophys Rev 2021; 13:797-801. [PMID: 34804246 PMCID: PMC8590420 DOI: 10.1007/s12551-021-00910-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 11/28/2022] Open
Abstract
The 20th IUPAB Congress took place online, together with the annual meetings of the Brazilian Biophysical Society and the Brazilian Society for Biochemistry and Molecular Biology, from the 4th to the 8th of October, 2021. The ten keynote lectures, 24 symposia, two poster sessions, and a series of technical seminars covered the full diversity of current biophysical research and its interfaces with other fields. The event had over 1000 attendees, with an excellent gender balance. Although the Americas dominated, there were also significant numbers of participants from Europe, Asia, and Africa.
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Affiliation(s)
- Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo, Brazil
| | | | - Antonio José Costa-Filho
- Ribeirão Preto School of Philosophy, Sciences and Literature, University of São Paulo, Ribeirão Preto, Brazil
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13
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Donato M, Soto C, Lanio ME, Itri R, Álvarez C. The pore-forming activity of sticholysin I is enhanced by the presence of a phospholipid hydroperoxide in membrane. Toxicon 2021; 204:44-55. [PMID: 34736955 DOI: 10.1016/j.toxicon.2021.10.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/23/2021] [Accepted: 10/29/2021] [Indexed: 11/19/2022]
Abstract
Sticholysin I (StI) is a pore-forming toxin (PFT) belonging to the actinoporin protein family characterized by high permeabilizing activity in membranes. StI readily associates with sphingomyelin (SM)-containing membranes originating pores that can lead to cell death. Binding and pore-formation are critically dependent on the physicochemical properties of membrane. 1-palmitoyl-2-oleoylphosphatidylcholine hydroperoxide (POPC-OOH) is an oxidized phospholipid (OxPL) containing an -OOH moiety in the unsaturated hydrocarbon chain which orientates towards the bilayer interface. This orientation causes an increase in the lipid molecular area, lateral expansion and decrease in bilayer thickness, elastic and bending modulus, as well as modification of lipid packing. Taking advantage of membrane structural changes promoted by POPC-OOH, we investigated its influence on the permeabilizing ability of StI. Here we report the action of StI on Giant Unilamellar Vesicles (GUVs) made of 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) and SM containing increasing amount of POPC-OOH to assess vesicle permeability changes when compared to OxPL-lacking membranes. Inclusion of POPC-OOH in membranes did not promote spontaneous vesicle leaking but resulted in increased membrane permeability due to StI action. StI activity did not modify the fluid-gel phase coexistence boundaries neither in POPC:SM or POPC-OOH:SM membranes. However, the StI insertion mechanism in membrane seems to differ between POPC:SM and POPC-OOH:SM mixtures as suggested by changes in the time course of monolayer surface tension measurements, even though a preferable binding of the toxin to OxPL-containing systems could not be here demonstrated. In summary, modifications in the membrane imposed by lipid hydroperoxidation favor StI permeabilizing activity.
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Affiliation(s)
- Maressa Donato
- Instituto de Física, Universidade de São Paulo (USP), São Paulo, SP, Brazil; Center for Laser and Applications, Nuclear and Energy Research Institute, São Paulo, Brazil
| | - Carmen Soto
- Centro de Estudio de Proteínas, Facultad de Biología, Universidad de La Habana, CP, 10400, La Habana, Cuba
| | - María Eliana Lanio
- Centro de Estudio de Proteínas, Facultad de Biología, Universidad de La Habana, CP, 10400, La Habana, Cuba
| | - Rosangela Itri
- Instituto de Física, Universidade de São Paulo (USP), São Paulo, SP, Brazil.
| | - Carlos Álvarez
- Centro de Estudio de Proteínas, Facultad de Biología, Universidad de La Habana, CP, 10400, La Habana, Cuba.
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14
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Scanavachi G, Coutinho A, Fedorov AA, Prieto M, Melo AM, Itri R. Lipid Hydroperoxide Compromises the Membrane Structure Organization and Softens Bending Rigidity. Langmuir 2021; 37:9952-9963. [PMID: 34374545 DOI: 10.1021/acs.langmuir.1c00830] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipid hydroperoxides are key mediators of diseases and cell death. In this work, the structural and dynamic perturbations induced by the hydroperoxidized POPC lipid (POPC-OOH) in fluid POPC membranes, at both 23 and 37 °C, were addressed using advanced small-angle X-ray scattering (SAXS) and fluorescence methodologies. Notably, SAXS reveals that the hydroperoxide group decreases the lipid bilayer bending rigidity. This alteration disfavors the bilayer stacking and increases the swelling in-between stacked bilayers. We further investigated the changes in the apolar/polar interface of hydroperoxide-containing membranes through time-resolved fluorescence/anisotropy experiments of the probe TMA-DPH and time-dependent fluorescence shifts of Laurdan. A shorter mean fluorescence lifetime for TMA-DPH was obtained in enriched POPC-OOH membranes, revealing a higher degree of hydration near the membrane interface. Moreover, a higher microviscosity near TMA-DPH and lower order are predicted for these oxidized membranes, at variance with the usual trend of variation of these two parameters. Finally, the complex relaxation process of Laurdan in pure POPC-OOH membranes also indicates a higher membrane hydration and viscosity in the close vicinity of the -OOH moiety. Altogether, our combined approach reveals that the hydroperoxide group promotes alterations in the membrane structure organization, namely, at the level of membrane order, viscosity, and bending rigidity.
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Affiliation(s)
- Gustavo Scanavachi
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil
| | - Ana Coutinho
- iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
- Dep. Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisboa 1749-016, Portugal
- Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Alexander Andreevich Fedorov
- iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
- Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Manuel Prieto
- iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
- Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Ana M Melo
- iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
- Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil
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15
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Itri R, Baptista MS, Garratt R, da Costa Filho AJ. Announcing the call for the Special Issue on the 20 th International Congress of the International Union of Pure and Applied Biophysics (IUPAB)-virtual meeting, October 2021. Biophys Rev 2021; 13:171-172. [PMID: 33815624 PMCID: PMC8009069 DOI: 10.1007/s12551-021-00796-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2021] [Indexed: 12/12/2022] Open
Abstract
This Commentary describes a call for submissions for the upcoming Special Issue focused on the science presented at the 20th IUPAB Congress to be held in conjunction with the 45th Annual Meeting of the Brazilian Biophysical Society and the 49th Annual Meeting of the Brazilian Society for Biochemistry and Molecular Biology.
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Affiliation(s)
- Rosangela Itri
- Instituto de Fisica, Universidade de São Paulo, São Paulo, SP Brazil
| | - Mauricio S. Baptista
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Richard Garratt
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP Brazil
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16
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Martins WK, Belotto R, Silva MN, Grasso D, Suriani MD, Lavor TS, Itri R, Baptista MS, Tsubone TM. Autophagy Regulation and Photodynamic Therapy: Insights to Improve Outcomes of Cancer Treatment. Front Oncol 2021; 10:610472. [PMID: 33552982 PMCID: PMC7855851 DOI: 10.3389/fonc.2020.610472] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/03/2020] [Indexed: 12/24/2022] Open
Abstract
Cancer is considered an age-related disease that, over the next 10 years, will become the most prevalent health problem worldwide. Although cancer therapy has remarkably improved in the last few decades, novel treatment concepts are needed to defeat this disease. Photodynamic Therapy (PDT) signalize a pathway to treat and manage several types of cancer. Over the past three decades, new light sources and photosensitizers (PS) have been developed to be applied in PDT. Nevertheless, there is a lack of knowledge to explain the main biochemical routes needed to trigger regulated cell death mechanisms, affecting, considerably, the scope of the PDT. Although autophagy modulation is being raised as an interesting strategy to be used in cancer therapy, the main aspects referring to the autophagy role over cell succumbing PDT-photoinduced damage remain elusive. Several reports emphasize cytoprotective autophagy, as an ultimate attempt of cells to cope with the photo-induced stress and to survive. Moreover, other underlying molecular mechanisms that evoke PDT-resistance of tumor cells were considered. We reviewed the paradigm about the PDT-regulated cell death mechanisms that involve autophagic impairment or boosted activation. To comprise the autophagy-targeted PDT-protocols to treat cancer, it was underlined those that alleviate or intensify PDT-resistance of tumor cells. Thereby, this review provides insights into the mechanisms by which PDT can be used to modulate autophagy and emphasizes how this field represents a promising therapeutic strategy for cancer treatment.
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Affiliation(s)
- Waleska K Martins
- Laboratory of Cell and Membrane, Anhanguera University of São Paulo, São Paulo, Brazil
| | - Renata Belotto
- Perola Byington Hospital Gynecology - Lasertherapy Clinical Research Department, São Paulo, Brazil
| | - Maryana N Silva
- Laboratory of Cell and Membrane, Anhanguera University of São Paulo, São Paulo, Brazil
| | - Daniel Grasso
- CONICET, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Maynne D Suriani
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Tayná S Lavor
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo, Brazil
| | | | - Tayana M Tsubone
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, Brazil
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17
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Come B, Donato M, Potenza LF, Mariani P, Itri R, Spinozzi F. The intriguing role of rhamnolipids on plasma membrane remodelling: From lipid rafts to membrane budding. J Colloid Interface Sci 2021; 582:669-677. [DOI: 10.1016/j.jcis.2020.08.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/24/2020] [Accepted: 08/06/2020] [Indexed: 01/26/2023]
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18
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Yoneda JS, de Araujo DR, Sella F, Liguori GR, Liguori TTA, Moreira LFP, Spinozzi F, Mariani P, Itri R. Self-assembled guanosine-hydrogels for drug-delivery application: Structural and mechanical characterization, methylene blue loading and controlled release. Mater Sci Eng C Mater Biol Appl 2020; 121:111834. [PMID: 33579472 DOI: 10.1016/j.msec.2020.111834] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/09/2020] [Accepted: 12/20/2020] [Indexed: 12/13/2022]
Abstract
It is known that guanosine derivatives (G) self-assemble in water forming long, flexible, and interacting aggregates (the so-called G-quadruplexes): by modulating the quadruplex charges, e.g. simply using a mixture of guanosine 5'-monophosphate (GMP) and guanosine (Gua), multi-responsive, self-healing hydrogels can be obtained. In this paper, the potential application of G-hydrogels as drug delivery systems has been assessed. Hydrogels were prepared at different Gua:GMP molar ratios. The photosensitizer Methylene Blue and the pro-apoptotic protein cytochrome C were used as cargo molecules. Small angle x-ray scattering and atomic force microscopy experiments confirmed the presence of G-quadruplexes disposed in swollen matrices with different mesh-sizes. Rheology measurements showed that the Gua:GMP molar ratio leads to specific drug release mechanisms, as the gel strength is finely tuned by electrostatic repulsion and van der Waals attraction between G-quadruplexes. Noteworthy, the gel cohesion and the drug release were pH responsive. Swelling, self-healing and cell viability features were also investigated: the results qualify the Gua:GMP hydrogel as an excellent biomaterial that can entrap and deliver key biomolecules in a sustained and responsive release manner.
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Affiliation(s)
- Juliana S Yoneda
- Instituto de Fisica, Universidade de São Paulo, São Paulo, SP, Brazil.
| | | | - Fiorenza Sella
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Ancona, Italy
| | - Gabriel R Liguori
- Instituto do Coração (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Tácia T A Liguori
- Instituto do Coração (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Luiz Felipe P Moreira
- Instituto do Coração (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Francesco Spinozzi
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Ancona, Italy
| | - Paolo Mariani
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Ancona, Italy
| | - Rosangela Itri
- Instituto de Fisica, Universidade de São Paulo, São Paulo, SP, Brazil.
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19
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Tsubone TM, Martins WK, Franco MSF, Silva MN, Itri R, Baptista MS. Cellular compartments challenged by membrane photo-oxidation. Arch Biochem Biophys 2020; 697:108665. [PMID: 33159891 DOI: 10.1016/j.abb.2020.108665] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/20/2020] [Accepted: 10/31/2020] [Indexed: 12/18/2022]
Abstract
The lipid composition impacts directly on the structure and function of the cytoplasmic as well as organelle membranes. Depending on the type of membrane, specific lipids are required to accommodate, intercalate, or pack membrane proteins to the proper functioning of the cells/organelles. Rather than being only a physical barrier that separates the inner from the outer spaces, membranes are responsible for many biochemical events such as cell-to-cell communication, protein-lipid interaction, intracellular signaling, and energy storage. Photochemical reactions occur naturally in many biological membranes and are responsible for diverse processes such as photosynthesis and vision/phototaxis. However, excessive exposure to light in the presence of absorbing molecules produces excited states and other oxidant species that may cause cell aging/death, mutations and innumerable diseases including cancer. At the same time, targeting key compartments of diseased cells with light can be a promising strategy to treat many diseases in a clinical procedure called Photodynamic Therapy. Here we analyze the relationships between membrane alterations induced by photo-oxidation and the biochemical responses in mammalian cells. We specifically address the impact of photosensitization reactions in membranes of different organelles such as mitochondria, lysosome, endoplasmic reticulum, and plasma membrane, and the subsequent responses of eukaryotic cells.
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Affiliation(s)
| | | | - Marcia S F Franco
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | | | - Rosangela Itri
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil
| | - Mauricio S Baptista
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil.
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20
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Affiliation(s)
- Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, 1371, Sao Paulo, SP, 05508-090, Brazil.
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21
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Corvalán NA, Caviglia AF, Felsztyna I, Itri R, Lascano R. Lipid Hydroperoxidation Effect on the Dynamical Evolution of the Conductance Process in Bilayer Lipid Membranes: A Condition Toward Criticality. Langmuir 2020; 36:8883-8893. [PMID: 32643942 DOI: 10.1021/acs.langmuir.0c01243] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cell membranes are one of the main targets of oxidative processes mediated by reactive oxygen species (ROS). These chemical species interact with unsaturated fatty acids of membrane lipids, triggering an autocatalytic chain reaction, producing lipid hydroperoxides (LOOHs) as the first relatively stable product of the ROS-mediated lipid peroxidation (LPO) process. Numerous biophysical and computational studies have been carried out to elucidate the LPO impact on the structure and organization of lipid membranes. However, although LOOHs are the major primary product of LPO of polyunsaturated fatty acids (PUFAs), to the best of our knowledge, there is no experimental evidence on the effects of the accumulation of these LPO byproducts on the electrical properties and the underlying dynamics of lipid membranes. In this work, bilayer lipid membranes (BLMs) containing 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocoline (POPC) with increasing hydroperoxidized POPC (POPC-OOH) molar proportions (BLMPC/PC-OOH) are used as model membranes to investigate the effect of LOOH-mediated LPO propagation on the electrical behavior of lipid bilayers. Voltage-induced ion current signals are analyzed by applying the fractal method of power spectrum density (PSD) analysis. We experimentally prove that, when certain LOOH concentration and energy threshold are overcome, oxidized membranes evolve toward a critical state characterized by the emergence of non-linear electrical behavior dynamics and the pore-type metastable structures formation. PSD analysis shows that temporal dynamics exhibiting "white" noise (non-time correlations) reflects a linear relationship between the input and output signals, while long-term correlations (β > 0.5) begin to be observed closely to the transition (critical point) from linear (Ohmic) to nonlinear (non-Ohmic) behavior. The generation of lipid pores appears to arise as an optimized energy dissipation mechanism based on the system's ability to self-organize and generate ordered structures capable of dissipating energy gradients more efficiently under stressful oxidative conditions.
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Affiliation(s)
- Natalia A Corvalán
- Cátedra de Fisiología Vegetal, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba CP X5000, Argentina
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo, CP 66318, 05314970 São Paulo, Brazil
| | - Agustín F Caviglia
- Cátedra de Fisiología Vegetal, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba CP X5000, Argentina
| | - Iván Felsztyna
- Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Universidad Nacional de Córdoba-CONICET, Córdoba CP X5016, Argentina
| | - Rosangela Itri
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo, CP 66318, 05314970 São Paulo, Brazil
| | - Ramiro Lascano
- Cátedra de Fisiología Vegetal, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba CP X5000, Argentina
- Unidad de Estudios Agropecuarios (UDEA), Instituto Nacional de Tecnología Agropecuaria (INTA)-CONICET, Córdoba CP X5119, Argentina
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22
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Scanavachi G, Espinosa Y, Yoneda J, Rial R, Ruso J, Itri R. Aggregation features of partially unfolded bovine serum albumin modulated by hydrogenated and fluorinated surfactants: Molecular dynamics insights and experimental approaches. J Colloid Interface Sci 2020; 572:9-21. [DOI: 10.1016/j.jcis.2020.03.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 03/14/2020] [Accepted: 03/16/2020] [Indexed: 01/25/2023]
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23
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Kinoshita K, Scanavachi G, Tsubone TM, Solovyeva V, Brewer J, Itri R. Correlation Between Photosensitizer-Mediated Oxidative Stress and Aging Stress for Red Blood Cell Membrane Mechanical Property. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.2462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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24
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Yoneda JS, Sebinelli HG, Itri R, Ciancaglini P. Overview on solubilization and lipid reconstitution of Na,K-ATPase: enzyme kinetic and biophysical characterization. Biophys Rev 2020; 12:49-64. [PMID: 31955383 DOI: 10.1007/s12551-020-00616-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/07/2020] [Indexed: 12/11/2022] Open
Abstract
Na,K-ATPase is a membrane protein which plays a vital role. It pumps Na+ and K+ ions across the cellular membranes using energy from ATP hydrolysis, and is responsible for maintaining the osmotic equilibrium and generating the membrane potential. Moreover, Na,K-ATPase has also been involved in cell signaling, interacting with partner proteins. Cardiotonic steroids bind specifically to Na,K-ATPase triggering a number of signaling pathways. Because of its importance, many efforts have been employed to study the structure and function of this protein. Difficulties associated with its removal from natural membranes and the concomitant search for appropriate replacement conditions to keep the protein in solution have presented a challenge that had to be overcome prior to carrying out biophysical and biochemical studies in vitro. In this review, we summarized all of the methods and techniques applied by our group in order to obtain information about Na,K-ATPase in respect to solubilization, reconstitution into mimetic system, influence of lipid composition, stability, oligomerization, and aggregation.
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Affiliation(s)
- Juliana Sakamoto Yoneda
- Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil.
| | - Heitor Gobbi Sebinelli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, SP, 14040-901, Brazil
| | - Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, SP, 14040-901, Brazil
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25
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Gianni de Carvalho K, Gómez JE, Vallejo M, Marguet ER, Peroti NI, Donato M, Itri R, Colin VL. Production and properties of a bioemulsifier obtained from a lactic acid bacterium. Ecotoxicol Environ Saf 2019; 183:109553. [PMID: 31416012 DOI: 10.1016/j.ecoenv.2019.109553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 06/05/2019] [Accepted: 08/06/2019] [Indexed: 05/26/2023]
Abstract
In the present work, the production of bioemulsifier (BE) by a lactic acid bacterium (LAB) grown at 25 °C in lactic whey-based media for 24 h was evaluated. Maximum production was detected in a medium containing yeast extract, peptone and lactic whey (LAPLW medium), with a yield of 270 mg L-1. The BE proved to be more innocuous for Caco-2 cells, used as a toxicological indicator, than the non-ionic surfactant Triton X-100. In addition, the microbial product presented higher stability to changes in temperature (37 °C to 100 °C), pH (2-10), and salt concentration (5% and 20%, w/v) than the synthetic surfactant. Regarding emulsifying capacity tested against different hydrophobic substrates (kerosene, motor oil, diesel, sunflower oil, and grape oil), the BE displayed E24 values similar to or even better than those of Triton X-100. Finally, Triton X-100 caused irreversible modifications on the giant unilamellar vesicles (used as model membrane system), promoting the solubilization of the lipid bilayers. Nevertheless, BE induced temporary modifications of the membrane, which is associated with incorporation of the bioproduct in the outer layer. These results demonstrate the role of BE in biological processes, including reversible changes in microbial membranes to enhance the access to hydrophobic substrates.
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Affiliation(s)
- K Gianni de Carvalho
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pje. Caseros, 4000, Tucumán, Argentina
| | - J E Gómez
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pje. Caseros, 4000, Tucumán, Argentina
| | - M Vallejo
- Laboratorio de Biotecnología Bacteriana, Universidad Nacional de la Patagonia San Juan Bosco, 9 de Julio 25, 9100, Trelew, Chubut, Argentina
| | - E R Marguet
- Laboratorio de Biotecnología Bacteriana, Universidad Nacional de la Patagonia San Juan Bosco, 9 de Julio 25, 9100, Trelew, Chubut, Argentina
| | - N I Peroti
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pje. Caseros, 4000, Tucumán, Argentina
| | - M Donato
- Institute of Physics, University of Sao Paulo, SP, Brazil
| | - R Itri
- Institute of Physics, University of Sao Paulo, SP, Brazil
| | - V L Colin
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pje. Caseros, 4000, Tucumán, Argentina.
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26
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Tsubone TM, Baptista MS, Itri R. Understanding membrane remodelling initiated by photosensitized lipid oxidation. Biophys Chem 2019; 254:106263. [DOI: 10.1016/j.bpc.2019.106263] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/13/2019] [Accepted: 09/03/2019] [Indexed: 12/19/2022]
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27
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Kumagai PS, Sousa VK, Donato M, Itri R, Beltramini LM, Araujo APU, Buerck J, Wallace BA, Lopes JLS. Unveiling the binding and orientation of the antimicrobial peptide Plantaricin 149 in zwitterionic and negatively charged membranes. Eur Biophys J 2019; 48:621-633. [PMID: 31324942 DOI: 10.1007/s00249-019-01387-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/05/2019] [Accepted: 07/01/2019] [Indexed: 12/24/2022]
Abstract
Antimicrobial peptides are a large group of natural compounds which present promising properties for the pharmaceutical and food industries, such as broad-spectrum activity, potential for use as natural preservatives, and reduced propensity for development of bacterial resistance. Plantaricin 149 (Pln149), isolated from Lactobacillus plantarum NRIC 149, is an intrinsically disordered peptide with the ability to inhibit bacteria from the Listeria and Staphylococcus genera, and which is capable of promoting inhibition and disruption of yeast cells. In this study, the interactions of Pln149 with model membranes composed of zwitterionic and/or anionic phospholipids were investigated using a range of biophysical techniques, including isothermal titration calorimetry, surface tension measurements, synchrotron radiation circular dichroism spectroscopy, oriented circular dichroism spectroscopy, and optical microscopy, to elucidate these peptides' mode of interactions and provide insight into their functional roles. In anionic model membranes, the binding of Pln149 to lipid bilayers is an endothermic process and induces a helical secondary structure in the peptide. The helices bind parallel to the surfaces of lipid bilayers and can promote vesicle disruption, depending on peptide concentration. Although Pln149 has relatively low affinity for zwitterionic liposomes, it is able to adsorb at their lipid interfaces, disturbing the lipid packing, assuming a similar parallel helix structure with a surface-bound orientation, and promoting an increase in the membrane surface area. Such findings can explain the intriguing inhibitory action of Pln149 in yeast cells whose cell membranes have a significant zwitterionic lipid composition.
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Affiliation(s)
- Patricia S Kumagai
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, 13563-120, Brazil
| | - Victor K Sousa
- Departamento Física Aplicada, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, São Paulo, SP, 05508-090, Brazil
| | - Maressa Donato
- Departamento Física Aplicada, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, São Paulo, SP, 05508-090, Brazil
| | - Rosangela Itri
- Departamento Física Aplicada, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, São Paulo, SP, 05508-090, Brazil
| | - Leila M Beltramini
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, 13563-120, Brazil
| | - Ana P U Araujo
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, 13563-120, Brazil
| | - Jochen Buerck
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), POB 3640, 76021, Karlsruhe, Germany
| | - B A Wallace
- Institute of Structural and Molecular Biology, Birkbeck College, University of London, London, WC1E 7HX, UK
| | - Jose L S Lopes
- Departamento Física Aplicada, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, São Paulo, SP, 05508-090, Brazil.
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28
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Kumagai PS, Martins CS, Sales EM, Rosa HV, Mendonça DC, Damalio JCP, Spinozzi F, Itri R, Araujo APU. Correct partner makes the difference: Septin G-interface plays a critical role in amyloid formation. Int J Biol Macromol 2019; 133:428-435. [DOI: 10.1016/j.ijbiomac.2019.04.105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/12/2019] [Accepted: 04/15/2019] [Indexed: 01/04/2023]
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29
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González-Durruthy M, Scanavachi G, Rial R, Liu Z, Cordeiro MNDS, Itri R, Ruso JM. Structural and energetic evolution of fibrinogen toward to the betablocker interactions. Int J Biol Macromol 2019; 137:405-419. [PMID: 31265849 DOI: 10.1016/j.ijbiomac.2019.06.229] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/10/2019] [Accepted: 06/28/2019] [Indexed: 11/29/2022]
Abstract
We present a computational analysis coupled with experimental studies, focusing on the binding-interaction between beta-adrenoreceptor blocking agents (acebutolol and propranolol) with fibrinogen protein (E-region). Herein, computational modeling on structural validation and flexibility properties of fibrinogen E-region showed that the E-region interacting residues, which form the funnel-shaped hydrophobic cavity for ligand-binding, can be efficiently modeled. The obtained free energy of binding (FEB) values for the docking complexes, namely acebutolol/fibrinogen E-region and propranolol/fibrinogen E-region, were very close and amounted to - 6.9 kcal/mol and - 6.8 kcal/mol, respectively. They were supported by a high binding-accuracy (R.M.S.D < 2 Å) for the best crystallographic binding-poses in both cases. In this regard, we identify a docking-mechanism of interaction for the propranolol and acebutolol mainly based on non-covalent hydrophobic contacts with the fibrinogen E-region binding-site. Besides, the beta-adrenoreceptor blocking agents are able to induce local perturbations affecting particularly the fibrinogen E-region allosteric residues linked to significant changes in the inter-residue communication and flexibility properties of residue network. In this sense, we show that the key biophysical parameters like frequency and collectivity degree may be compromised in different ways by the interaction with acebutolol and propranolol. Isothermal titration calorimetry, zeta potential and small angle X-ray scattering (SAXS) measurements were performed to complete and corroborate computational analysis. The combined experimental results point out that acebutolol acts to a lesser extent to fibrinogen structure than propranolol.
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Affiliation(s)
- Michael González-Durruthy
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain; LAQV-REQUIMTE of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Gustavo Scanavachi
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil
| | - Ramón Rial
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Zhen Liu
- Department of Physics and Engineering, Frostburg State University, Frostburg, MD 21532, United States
| | - M Natália D S Cordeiro
- LAQV-REQUIMTE of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Rosangela Itri
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil
| | - Juan M Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
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30
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Nava G, Carducci F, Itri R, Yoneda JS, Bellini T, Mariani P. Quadruplex knots as network nodes: nano-partitioning of guanosine derivates in supramolecular hydrogels. Soft Matter 2019; 15:2315-2318. [PMID: 30806419 DOI: 10.1039/c8sm02616e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Aqueous solutions of guanosine-5'-monophosphates (GMP) - known to form G-quadruplexes and liquid crystal phases - can be induced to turn into high water content gels by the addition of guanosine (Gua). By a combination of Light Scattering (LS) and AFM we show that Gua/GMP hydrogels are microscopically heterogeneous, formed by Gua-rich disordered microcoils of intertwined filaments ("knots") connected by GMP-rich long linear threads. The different thermal stability of knots and threads controls the gel transition.
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Affiliation(s)
- Giovanni Nava
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università di Milano, via Vanvitelli 32, 20129 Milano, Italy.
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31
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Belotto R, Santos RE, Tardivo JP, Fernandes R, Baptista M, Itri R, Chavantes MC. Photodynamic therapy in vulvar lymphangioma: Case report. Photodiagnosis Photodyn Ther 2019; 25:84-86. [DOI: 10.1016/j.pdpdt.2018.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/06/2018] [Accepted: 09/04/2018] [Indexed: 11/29/2022]
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32
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Tsubone TM, Junqueira HC, Baptista MS, Itri R. Contrasting roles of oxidized lipids in modulating membrane microdomains. Biochim Biophys Acta Biomembr 2018; 1861:660-669. [PMID: 30605637 DOI: 10.1016/j.bbamem.2018.12.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/07/2018] [Accepted: 12/27/2018] [Indexed: 01/06/2023]
Abstract
Lipid rafts display a lateral heterogeneity forming membrane microdomains that hold a fundamental role on biological membranes and are indispensable to physiological functions of cells. Oxidative stress in cellular environments may cause lipid oxidation, changing membrane composition and organization, thus implying in effects in cell signaling and even loss of homeostasis. The individual contribution of oxidized lipid species to the formation or disruption of lipid rafts in membranes still remains unknown. Here, we investigate the role of different structures of oxidized phospholipids on rafts microdomains by carefully controlling the membrane composition. Our experimental approach based on fluorescence microscopy of giant unilamellar vesicles (GUV) enables the direct visualization of the impact of hydroperoxidized POPC lipid (referred to as POPCOOH) and shortened chain lipid PazePC (1-palmitoyl-2-azelaoyl-sn-glycero-3-phosphocholine) on phase separation. We found that the molecular structure of oxidized lipid is of paramount importance on lipid mixing and/or demixing. The hydrophobic mismatch promoted by POPCOOH coupled to its cylindrical molecular shape favor microdomains formation. In contrast, the conical shape of PazePC causes disarrangement of lipid 2D organized platforms. Our findings contribute to better unraveling how oxidized phospholipids can trigger formation or disruption of lipid rafts. As a consequence, phospholipid oxidation may indirectly affect association or dissociation of key biomolecules in the rafts thus altering cell signaling and homeostasis.
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Affiliation(s)
- Tayana Mazin Tsubone
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil
| | | | - Maurício S Baptista
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Rosangela Itri
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil.
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33
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Vignoni M, Urrutia MN, Junqueira HC, Greer A, Reis A, Baptista MS, Itri R, Thomas AH. Photo-Oxidation of Unilamellar Vesicles by a Lipophilic Pterin: Deciphering Biomembrane Photodamage. Langmuir 2018; 34:15578-15586. [PMID: 30457340 DOI: 10.1021/acs.langmuir.8b03302] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Pterins are natural products that can photosensitize the oxidation of DNA, proteins, and phospholipids. Recently, a new series of decyl-chain (i.e., lipophilic) pterins were synthesized and their photophysical properties were investigated. These decyl-pterins led to efficient intercalation in large unilamellar vesicles and produced, under UVA irradiation, singlet molecular oxygen, a highly oxidative species that react with polyunsaturated fatty acids (PUFAs) to form hydroperoxides. Here, we demonstrate that the association of 4-(decyloxy)pteridin-2-amine ( O-decyl-Ptr) to lipid membranes is key to its ability to trigger phospholipid oxidation in unilamellar vesicles of phosphatidylcholine rich in PUFAs used as model biomembranes. Our results show that O-decyl-Ptr is at least 1 order of magnitude more efficient photosensitizer of lipids than pterin (Ptr), the unsubstituted derivative of the pterin family, which is more hydrophilic and freely passes across lipid membranes. Lipid peroxidation photosensitized by O-decyl-Ptr was detected by the formation of conjugated dienes and oxidized lipids, such as hydroxy and hydroperoxide derivatives. These primary products undergo a rapid conversion into short-chain secondary products by cleavage of the fatty-acid chains, some of which are due to subsequent photosensitized reactions. As a consequence, a fast increase in membrane permeability is observed. Therefore, lipid oxidation induced by O-decyl-Ptr could promote cell photodamage due to the biomembrane integrity loss, which in turn may trigger cell death.
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Affiliation(s)
- Mariana Vignoni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
| | - Maria Noel Urrutia
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
| | - Helena C Junqueira
- Departamento de Bioquímica, Instituto de Química , Universidade de São Paulo , 05508-000 São Paulo , Brazil
| | - Alexander Greer
- Department of Chemistry , Brooklyn College, City University of New York , Brooklyn , 11210 New York , United States
- Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , 365 Fifth Avenue , 10016 New York , New York , United States
| | - Ana Reis
- ICETA/REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , 4169-007 Porto , Portugal
| | - Mauricio S Baptista
- Departamento de Bioquímica, Instituto de Química , Universidade de São Paulo , 05508-000 São Paulo , Brazil
| | - Rosangela Itri
- Institute of Physics , University of São Paulo , 05508-090 São Paulo , Brazil
| | - Andrés H Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
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34
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Carducci F, Yoneda JS, Itri R, Mariani P. On the structural stability of guanosine-based supramolecular hydrogels. Soft Matter 2018; 14:2938-2948. [PMID: 29611597 DOI: 10.1039/c8sm00299a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular hydrogels formed from the self-assembly of low molecular weight derivatives are very attractive systems, because of their potential applications in nano- and bio-technology. In this paper, the stable and transparent hydrogels observed in binary mixtures of guanosine derivatives (G), namely guanosine 5'-monophosphate (GMP) and guanosine (Gua), dissolved in water (at volume fractions larger than 0.95), were investigated by microscopy techniques and Small Angle X-ray Scattering (SAXS). The results confirm the presence of G-quadruplexes, chiral cylindrical rods obtained by the regular stacking of self-assembled planar cyclic guanosine quartets. However, the addition of Gua determines the formation of very stable hydrogels able to trap large amounts of water (up to a volume fraction of 0.99) and characterised by an unusual anisotropic order. A modified lateral helix-to-helix interaction pattern, tuned by Gua, is suggested to be responsible for the supramolecular gelation and the stability of the hydrogels during swelling.
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Affiliation(s)
- Federica Carducci
- Dipartimento di Scienze della Vita e dell'Ambiente, Molecular Biophysics Group, Università Politecnica delle Marche, Via Brecce Bianche, I-60131 Ancona, Italy.
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35
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Kinoshita K, Campos G, Tsubone T, Solovyeva V, Brewer J, Needham D, Itri R. Mechanical Property Change of Red Blood Cell Membrane under Photosensitizer Mediated Oxidative Stress of CIS Porphyrin. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.1812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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36
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Ciancaglini P, Itri R. Biophysics in Latin America. Biophys Rev 2017; 9:459-460. [DOI: 10.1007/s12551-017-0325-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 09/04/2017] [Indexed: 11/29/2022] Open
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37
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de Souza RM, Siani P, Schmidt TF, Itri R, Dias LG. Methylene Blue Location in (Hydroperoxized) Cardiolipin Monolayer: Implication in Membrane Photodegradation. J Phys Chem B 2017; 121:8512-8522. [DOI: 10.1021/acs.jpcb.7b04824] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- R. M. de Souza
- Departamento
de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - P. Siani
- Departamento
de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - T. F. Schmidt
- Universidade Federal do ABC (UFABC), Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - R. Itri
- Departamento
de Física Aplicada, Instituto de Física, Universidade de São Paulo, Rua do Matão 187, 05508-900, São Paulo, SP, Brazil
| | - L. G. Dias
- Departamento
de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
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38
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Tsubone TM, Martins WK, Pavani C, Junqueira HC, Itri R, Baptista MS. Enhanced efficiency of cell death by lysosome-specific photodamage. Sci Rep 2017; 7:6734. [PMID: 28751688 PMCID: PMC5532215 DOI: 10.1038/s41598-017-06788-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 06/19/2017] [Indexed: 11/08/2022] Open
Abstract
Mobilization of specific mechanisms of regulated cell death is a promising alternative to treat challenging illness such as neurodegenerative disease and cancer. The use of light to activate these mechanisms may provide a route for target-specific therapies. Two asymmetric porphyrins with opposite charges, the negatively charged TPPS2a and the positively charged CisDiMPyP were compared in terms of their properties in membrane mimics and in cells. CisDiMPyP interacts to a larger extent with model membranes and with cells than TPPS2a, due to a favorable electrostatic interaction. CisDiMPyP is also more effective than TPPS2a in damaging membranes. Surprisingly, TPPS2a is more efficient in causing photoinduced cell death. The lethal concentration on cell viability of 50% (LC50) found for TPPS2a was ~3.5 (raw data) and ~5 (considering photosensitizer incorporation) times smaller than for CisDiMPyP. CisDiMPyP damaged mainly mitochondria and triggered short-term phototoxicity by necro-apoptotic cell death. Photoexcitation of TPPS2a promotes mainly lysosomal damage leading to autophagy-associated cell death. Our data shows that an exact damage in lysosome is more effective to diminish proliferation of HeLa cells than a similar damage in mitochondria. Precisely targeting organelles and specifically triggering regulated cell death mechanisms shall help in the development of new organelle-target therapies.
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Affiliation(s)
| | - Waleska Kerllen Martins
- Instituto de Química, Universidade de São Paulo, São Paulo-SP, Brazil
- Universidade Santo Amaro, São Paulo-SP, Brazil
| | - Christiane Pavani
- Instituto de Química, Universidade de São Paulo, São Paulo-SP, Brazil
- Universidade Nove de Julho, São Paulo-SP, Brazil
| | | | - Rosangela Itri
- Instituto de Física, Universidade de São Paulo, São Paulo-SP, Brazil
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Perinelli DR, Vllasaliu D, Bonacucina G, Come B, Pucciarelli S, Ricciutelli M, Cespi M, Itri R, Spinozzi F, Palmieri GF, Casettari L. Rhamnolipids as epithelial permeability enhancers for macromolecular therapeutics. Eur J Pharm Biopharm 2017; 119:419-425. [PMID: 28743594 DOI: 10.1016/j.ejpb.2017.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/10/2017] [Accepted: 07/20/2017] [Indexed: 02/04/2023]
Abstract
The use of surfactants as drug permeability enhancers across epithelial barriers remains a challenge. Although many studies have been performed in this field using synthetic surfactants, the possibility of employing surfactants produced by bacteria (the so called biosurfactants") has not been completely explored. Among them, one of the most well characterized class of biosurfactants are rhamnolipids. The aim of the study was to investigate the effect of rhamnolipids on the epithelial permeability of fluorescein isothiocyanate-labelled dextrans 4kDa and 10kDa (named FD4 and FD10, respectively) as model for macromolecular drugs, across Caco-2 and Calu-3monolayers. These cell lines were selected as an in vitro model for the oral and respiratory administration of drugs. Before performing permeability studies, rhamnolipids mixture was analysed in terms of chemical composition and quantification through mass analysis and HPLC. Cytotoxicity and transepithelial electrical resistance (TEER) studies were also conducted using Caco-2 and Calu-3 cell lines. A dose-dependent effect of rhamnolipids on TEER and FD4 or FD10 permeability across both cell lines was observed at relatively safe concentrations. Overall, results suggest the possibility of using rhamnolipids as absorption enhancers for macromolecular drugs through a reversible tight junction opening (paracellular route), despite more investigations are required to confirm their mechanism of action in term of permeability.
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Affiliation(s)
- Diego Romano Perinelli
- School of Pharmacy, University of Camerino, via Gentile III da Varano, 62032 Camerino, MC, Italy
| | - Driton Vllasaliu
- School of Pharmacy, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK
| | - Giulia Bonacucina
- School of Pharmacy, University of Camerino, via Gentile III da Varano, 62032 Camerino, MC, Italy
| | - Benedetta Come
- Department of Life and Environmental Science, Polytechnic University of Marche, Ancona, Italy
| | - Stefania Pucciarelli
- School of Biosciences and Veterinary medicine, University of Camerino, via Gentile III da Varano, 62032 Camerino, MC, Italy
| | - Massimo Ricciutelli
- School of Pharmacy, University of Camerino, via Gentile III da Varano, 62032 Camerino, MC, Italy
| | - Marco Cespi
- School of Pharmacy, University of Camerino, via Gentile III da Varano, 62032 Camerino, MC, Italy
| | - Rosangela Itri
- Instituto de Física da Universidade de São Paulo, IFUSP, Rua do Matão, Travessa R, 187, 05508-090 São Paulo, Brazil
| | - Francesco Spinozzi
- Department of Life and Environmental Science, Polytechnic University of Marche, Ancona, Italy
| | | | - Luca Casettari
- Department of Biomolecular Sciences, School of Pharmacy, University of Urbino, Piazza del Rinascimento, 6, 61029 Urbino, PU, Italy.
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González-Lizárraga F, Socías SB, Ávila CL, Torres-Bugeau CM, Barbosa LRS, Binolfi A, Sepúlveda-Díaz JE, Del-Bel E, Fernandez CO, Papy-Garcia D, Itri R, Raisman-Vozari R, Chehín RN. Repurposing doxycycline for synucleinopathies: remodelling of α-synuclein oligomers towards non-toxic parallel beta-sheet structured species. Sci Rep 2017; 7:41755. [PMID: 28155912 PMCID: PMC5290535 DOI: 10.1038/srep41755] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 12/14/2016] [Indexed: 12/03/2022] Open
Abstract
Synucleinophaties are progressive neurodegenerative disorders with no cure to date. An attractive strategy to tackle this problem is repurposing already tested safe drugs against novel targets. In this way, doxycycline prevents neurodegeneration in Parkinson models by modulating neuroinflammation. However, anti-inflammatory therapy per se is insufficient to account for neuroprotection. Herein we characterise novel targets of doxycycline describing the structural background supporting its effectiveness as a neuroprotector at subantibiotic doses. Our results show that doxycycline reshapes α-synuclein oligomers into off-pathway, high-molecular-weight species that do not evolve into fibrils. Off-pathway species present less hydrophobic surface than on-pathway oligomers and display different β-sheet structural arrangement. These structural changes affect the α-synuclein ability to destabilize biological membranes, cell viability, and formation of additional toxic species. Altogether, these mechanisms could act synergically giving novel targets for repurposing this drug.
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Affiliation(s)
- Florencia González-Lizárraga
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CCT-Tucumán and Instituto de Química Biológica Dr Bernabé Bloj (CONICET-UNT), Chacabuco 461 (T4000ILI) Tucumán, Argentina.,Institut National De La Santé Et De La Recherche Médicale, U 1127, CNRS, Unité Mixte De Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut Du Cerveau Et De La Moelle Epinière, ICM, Paris, France
| | - Sergio B Socías
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CCT-Tucumán and Instituto de Química Biológica Dr Bernabé Bloj (CONICET-UNT), Chacabuco 461 (T4000ILI) Tucumán, Argentina
| | - César L Ávila
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CCT-Tucumán and Instituto de Química Biológica Dr Bernabé Bloj (CONICET-UNT), Chacabuco 461 (T4000ILI) Tucumán, Argentina
| | - Clarisa M Torres-Bugeau
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CCT-Tucumán and Instituto de Química Biológica Dr Bernabé Bloj (CONICET-UNT), Chacabuco 461 (T4000ILI) Tucumán, Argentina
| | - Leandro R S Barbosa
- Instituto de Física da Universidade de São Paulo - IFUSP, Rua do Matão, Travessa R, 187, São Paulo, Brazil
| | - Andres Binolfi
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, Ocampo y Esmeralda, S2002LRK Rosario, Argentina
| | - Julia E Sepúlveda-Díaz
- Institut National De La Santé Et De La Recherche Médicale, U 1127, CNRS, Unité Mixte De Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut Du Cerveau Et De La Moelle Epinière, ICM, Paris, France
| | - Elaine Del-Bel
- Department of Morphology, Physiology and Stomatology, Faculty of Odontology of Ribeirão Preto, University of São Paulo, Brazil, Center of Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, Brazil
| | - Claudio O Fernandez
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, Ocampo y Esmeralda, S2002LRK Rosario, Argentina
| | - Dulce Papy-Garcia
- Laboratoire Croissance, Réparation et Régénération Tissulaires (CRRET), CNRS ERL 9215, Université Paris Est Créteil, Université Paris Est, F-94000, Créteil, France
| | - Rosangela Itri
- Instituto de Física da Universidade de São Paulo - IFUSP, Rua do Matão, Travessa R, 187, São Paulo, Brazil
| | - Rita Raisman-Vozari
- Institut National De La Santé Et De La Recherche Médicale, U 1127, CNRS, Unité Mixte De Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut Du Cerveau Et De La Moelle Epinière, ICM, Paris, France
| | - Rosana N Chehín
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CCT-Tucumán and Instituto de Química Biológica Dr Bernabé Bloj (CONICET-UNT), Chacabuco 461 (T4000ILI) Tucumán, Argentina
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da Hora GCA, Archilha NL, Lopes JLS, Müller DM, Coutinho K, Itri R, Soares TA. Membrane negative curvature induced by a hybrid peptide from pediocin PA-1 and plantaricin 149 as revealed by atomistic molecular dynamics simulations. Soft Matter 2016; 12:8884-8898. [PMID: 27722742 DOI: 10.1039/c6sm01714b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Antimicrobial peptides (AMPs) are cationic peptides that kill bacteria with a broad spectrum of action, low toxicity to mammalian cells and exceptionally low rates of bacterial resistance. These features have led to considerable efforts in developing AMPs as an alternative antibacterial therapy. In vitro studies have shown that AMPs interfere with membrane bilayer integrity via several possible mechanisms, which are not entirely understood. We have performed the synthesis, membrane lysis measurements, and biophysical characterization of a novel hybrid peptide. These measurements show that PA-Pln149 does not form nanopores, but instead promotes membrane rupture. It causes fast rupture of the bacterial model membrane (POPG-rich) at concentrations 100-fold lower than that required for the disruption of mammalian model membranes (POPC-rich). Atomistic molecular dynamics (MD) simulations were performed for single and multiple copies of PA-Pln149 in the presence of mixed and pure POPC/POPG bilayers to investigate the concentration-dependent membrane disruption by the hybrid peptide. These simulations reproduced the experimental trend and provided a potential mechanism of action for PA-Pln149. It shows that the PA-Pln149 does not form nanopores, but instead promotes membrane destabilization through peptide aggregation and induction of membrane negative curvature with the collapse of the lamellar arrangement. The sequence of events depicted for PA-Pln149 may offer insights into the mechanism of action of AMPs previously shown to induce negative deformation of membrane curvature and often associated with peptide translocation via non-bilayer intermediate structures.
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Affiliation(s)
- G C A da Hora
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil.
| | - N L Archilha
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - J L S Lopes
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - D M Müller
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral (U.N.L). Ciudad Universitaria, C.C.242, (C.P:3000) Santa Fe, Argentina
| | - K Coutinho
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - R Itri
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - T A Soares
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil. and Department of Chemistry, Umeå University, 90187 Umeå, Sweden
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Martins WK, Gomide AB, Costa ÉT, Junqueira HC, Stolf BS, Itri R, Baptista MS. Membrane damage by betulinic acid provides insights into cellular aging. Biochim Biophys Acta Gen Subj 2016; 1861:3129-3143. [PMID: 27773704 DOI: 10.1016/j.bbagen.2016.10.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 10/19/2016] [Accepted: 10/19/2016] [Indexed: 01/05/2023]
Abstract
BACKGROUND Cell senescence is a process of central importance to the understanding of aging as well as to the development of new drugs. It is related with genomic instability, which has been shown to occur in the presence of autophagy deficiency. Yet, the mechanism that triggers genomic instability and senescence from a condition of autophagy deficiency remains unknown. By analyzing the consequences of treating human keratinocytes (HaCaT) with the pentacyclic triterpenoid Betulinic Acid (BA) we were able to propose that cell senescence can develop as a response to parallel damage in the membranes of mitochondria and lysosome. METHODS We performed biochemical, immunocytochemical and cytometric assays after challenging HaCaT cells with BA. We also evaluated membrane leakage induced by BA in liposomes and giant unilamellar vesicles. RESULTS By destabilizing lipid bilayers of mitochondria and lysosomes, BA triggers the misbalance in the mitochondrial-lysosomal axis leading to perceived autophagy impairment, lipofuscinogenesis, genomic instability and cell senescence. The progressive accumulation of mitochondria and lipofuscin, which comes from imperfect mitophagy triggered by BA, provides a continuous source of reactive species further damaging lysosomes and leading to cell aging. CONCLUSIONS This work reveals that the initial trigger of cell senescence can be the physical damage in the membranes of lysosomes and mitochondria. GENERAL SIGNIFICANCE This concept will help in the search of new drugs that act as senescence-inductors. BA is under evaluation as chemotherapeutic agent against several types of tumors and induction of cell senescence should be considered as one of its main mechanisms of action.
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Affiliation(s)
- Waleska K Martins
- Instituto de Química, Universidade de São Paulo, Brazil; Universidade de Santo Amaro, Brazil
| | - Andreza B Gomide
- Instituto de Física, Universidade de São Paulo, Brazil; Centro Universitário Padre Anchieta, Brazil
| | - Érico T Costa
- Ludwig Institute for Cancer Research (LICR) at Centro de Oncologia Molecular, Hospital Sírio Libanês, São Paulo, Brazil
| | | | - Beatriz S Stolf
- Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
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Yoneda JS, Scanavachi G, Sebinelli HG, Borges JC, Barbosa LRS, Ciancaglini P, Itri R. Multimeric species in equilibrium in detergent-solubilized Na,K-ATPase. Int J Biol Macromol 2016; 89:238-45. [PMID: 27109755 DOI: 10.1016/j.ijbiomac.2016.04.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 12/29/2022]
Abstract
In this work, we find an equilibrium between different Na,K-ATPase (NKA) oligomeric species solubilized in a non-ionic detergent C12E8 by means of Dynamic Light Scattering (DLS), Analytical Ultracentrifugation (AUC), Small Angle X-ray Scattering (SAXS), Spectrophotometry (absorption at 280/350nm) and enzymatic activity assay. The NKA sample after chromatography purification presented seven different populations as identified by AUC, with monomers and tetramers amounting to ∼55% of the total protein mass in solution. These two species constituted less than 40% of the total protein mass after increasing the NKA concentration. Removal of higher-order oligomer/aggregate species from the NKA solution using 220nm-pore filter resulted in an increase of the specific enzymatic activity. Nevertheless, the enzyme forms new large aggregates over an elapsed time of 20h. The results thus point out that C12E8-solubilized NKA is in a dynamic equilibrium of monomers, tetramers and high-order oligomers/subunit aggregates. These latter have low or null activity. High amount of detergent leads to the dissociation of NKA into smaller aggregates with no enzymatic activity.
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Affiliation(s)
- Juliana Sakamoto Yoneda
- Instituto de Física da Universidade de São Paulo, IF USP, 05508-090 São Paulo, Brazil; Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, FFCLRP USP, 14040-901 Ribeirão Preto, SP, Brazil
| | - Gustavo Scanavachi
- Instituto de Física da Universidade de São Paulo, IF USP, 05508-090 São Paulo, Brazil
| | - Heitor Gobbi Sebinelli
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, FFCLRP USP, 14040-901 Ribeirão Preto, SP, Brazil
| | - Júlio Cesar Borges
- Instituto de Química de São Carlos, IQSC-USP, 13560-970 São Carlos, SP, Brazil
| | - Leandro R S Barbosa
- Instituto de Física da Universidade de São Paulo, IF USP, 05508-090 São Paulo, Brazil
| | - Pietro Ciancaglini
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, FFCLRP USP, 14040-901 Ribeirão Preto, SP, Brazil
| | - Rosangela Itri
- Instituto de Física da Universidade de São Paulo, IF USP, 05508-090 São Paulo, Brazil.
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44
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Siani P, de Souza RM, Dias LG, Itri R, Khandelia H. An overview of molecular dynamics simulations of oxidized lipid systems, with a comparison of ELBA and MARTINI force fields for coarse grained lipid simulations. Biochim Biophys Acta 2016; 1858:2498-2511. [PMID: 27058982 DOI: 10.1016/j.bbamem.2016.03.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/23/2016] [Accepted: 03/24/2016] [Indexed: 11/29/2022]
Abstract
Biological membranes and model lipid systems containing high amounts of unsaturated lipids and sterols are subject to chemical and/or photo-induced lipid oxidation, which leads to the creation of exotic oxidized lipid products (OxPLs). OxPLs are known to have significant physiological impact in cellular systems and also affect physical properties of both biological and model lipid bilayers. In this paper we (i) provide a perspective on the existing literature on simulations of lipid bilayer systems containing oxidized lipid species as well as the main related experimental results, (ii) describe our new data of all-atom and coarse-grained simulations of hydroperoxidized lipid monolayer and bilayer systems and (iii) provide a comparison of the MARTINI and ELBA coarse grained force fields for lipid bilayer systems. We show that the better electrostatic treatment of interactions in ELBA is able to resolve previous conflicts between experiments and simulations. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg.
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Affiliation(s)
- P Siani
- MEMPHYS-Center for Biomembrane Physics, Department of Physics and Chemistry, University of Southern, Denmark; Departamento de Química, FFCLRP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - R M de Souza
- Departamento de Química, FFCLRP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - L G Dias
- Departamento de Química, FFCLRP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - R Itri
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
| | - H Khandelia
- MEMPHYS-Center for Biomembrane Physics, Department of Physics and Chemistry, University of Southern, Denmark.
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Ortore MG, Macedo JNA, Araujo APU, Ferrero C, Mariani P, Spinozzi F, Itri R. Structural and Thermodynamic Properties of Septin 3 Investigated by Small-Angle X-Ray Scattering. Biophys J 2016; 108:2896-902. [PMID: 26083929 DOI: 10.1016/j.bpj.2015.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/30/2015] [Accepted: 05/11/2015] [Indexed: 01/22/2023] Open
Abstract
Septins comprise a family of proteins involved in a variety of cellular processes and related to several human pathologies. They are constituted by three structural domains: the N- and C-terminal domains, highly variable in length and composition, and the central domain, involved in the guanine nucleotide (GTP) binding. Thirteen different human septins are known to form heterogeneous complexes or homofilaments, which are stabilized by specific interactions between the different interfaces present in the domains. In this work, we have investigated by in-solution small-angle x-ray scattering the structural and thermodynamic properties of a human septin 3 construct, SEPT3-GC, which contains both of both interfaces (G and NC) responsible for septin-septin interactions. In order to shed light on the role of these interactions, small-angle x-ray scattering measurements were performed in a wide range of temperatures, from 2 up to 56°C, both with and without a nonhydrolysable form of GTP (GTPγS). The acquired data show a temperature-dependent coexistence of monomers, dimers, and higher-order aggregates that were analyzed using a global fitting approach, taking into account the crystallographic structure of the recently reported SEPT3 dimer, PDB:3SOP. As a result, the enthalpy, entropy, and heat capacity variations that control the dimer-monomer dissociation equilibrium in solution were derived and GTPγS was detected to increase the enthalpic stability of the dimeric species. Moreover, a temperature increase was observed to induce dissociation of SEPT3-GC dimers into monomers just preceding their reassembling into amyloid aggregates, as revealed by the Thioflavin-T fluorescence assays.
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Affiliation(s)
- Maria Grazia Ortore
- Dipartimento di Scienze della Vita e dell'Ambiente and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Università Politecnica delle Marche, Ancona, Italy
| | - Joci N A Macedo
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Ana Paula U Araujo
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | | | - Paolo Mariani
- Dipartimento di Scienze della Vita e dell'Ambiente and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Università Politecnica delle Marche, Ancona, Italy
| | - Francesco Spinozzi
- Dipartimento di Scienze della Vita e dell'Ambiente and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Università Politecnica delle Marche, Ancona, Italy.
| | - Rosangela Itri
- Instituto de Física da Universidade de São Paulo, São Paulo, Brazil.
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Mazzoni S, Barbosa LRS, Funari SS, Itri R, Mariani P. Cytochrome-c Affects the Monoolein Polymorphism: Consequences for Stability and Loading Efficiency of Drug Delivery Systems. Langmuir 2016; 32:873-881. [PMID: 26710233 DOI: 10.1021/acs.langmuir.5b03507] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Structural properties and polymorphism of monoolein (MO) in aqueous solutions have been studied for a long time, and the final picture can be considered definite. The presence of bicontinuous phases and the ability to encapsulate hydrophilic, hydrophobic, and amphiphilic compounds, together with the capability to protect and slowly release the entrapped molecules, designated MO phases as good matrices for the sustained release of drugs. Because phase stability, loading efficiency, and bioavailability are strongly correlated, the interplay between MO phases and entrapped compounds is worthy of investigation. In this paper, low angle X-ray diffraction has been used to describe the effects of a model protein (the cytochrome-c) on the monoolein cubic phases as a function of both incubation time and protein concentration in the soaking solutions. Results show that the MO polymorphism is strongly modified by the protein, underlying the very large affinity of the cytochrome-c toward monoolein. However, the different phases have a different sensibility to cytochrome-c, as phase transitions occur when the protein amount exceeds some different critical values, probably related to the structure characteristics (2 cytochrome-c per unit cell at the Pn3m to Im3m cubic phase transition and 10-20 cytochrome-c per unit cell at the Im3m to P4332 cubic phase transition). Moreover, although equilibration times resulted to be quite long (more than 10 days), the fraction of cytochrome-c incorporated into the MO phases is very high (up to 20% v/v inside the P4332 cubic phase). Such results are intriguing: even if they may be specific to the cytochrome-c/MO case, the need of assessing the structural characteristics of lipid matrices before their use as drug delivery systems is evident.
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Affiliation(s)
- Serena Mazzoni
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche , Ancona 60121, Italy
| | - Leandro R S Barbosa
- Instituto de Fisica, Universidade de São Paulo , São Paulo 05508-020, Brazil
| | | | - Rosangela Itri
- Instituto de Fisica, Universidade de São Paulo , São Paulo 05508-020, Brazil
| | - Paolo Mariani
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche , Ancona 60121, Italy
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Rodrigues D, Viotto AC, Checchia R, Gomide A, Severino D, Itri R, Baptista MS, Martins WK. Mechanism of Aloe Vera extract protection against UVA: shelter of lysosomal membrane avoids photodamage. Photochem Photobiol Sci 2016; 15:334-50. [DOI: 10.1039/c5pp00409h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Aloe Vera extract exhibited remarkable ability of reducing both in vitro and in vivo photodamage, even though it does not have anti-radical properties.
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Affiliation(s)
| | | | | | - Andreza Gomide
- Instituto de Física
- Universidade de São Paulo
- Brazil
- Centro Universitário Padre Anchieta
- Brazil
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Simão AMS, Bolean M, Cury TAC, Stabeli RG, Itri R, Ciancaglini P. Liposomal systems as carriers for bioactive compounds. Biophys Rev 2015; 7:391-397. [PMID: 28510100 DOI: 10.1007/s12551-015-0180-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 09/22/2015] [Indexed: 11/30/2022] Open
Abstract
Since the revolutionary discovery that phospholipids can form closed bilayered structures in aqueous systems, the study of liposomes has become a very interesting area of research. The versatility and amazing biocompatibility of liposomes has resulted in their wide-spread use in many scientific fields, and many of their applications, especially in medicine, have yielded breakthroughs in recent decades. Specifically, their easy preparation and various structural aspects have given rise to broadly usable methodologies to internalize different compounds, with either lipophilic or hydrophilic properties. The study of compounds with potential biotechnological application(s) is generally related to evaluation and risk assessment of the possible cytotoxic or therapeutic effects of the compound under study. In most cases, undesirable side-effects are associated with an interaction of the liposome with the cell membrane and/or its absorption and subsequent interaction with a cellular biomolecule. Liposomal carrier systems have an unprecedented potential for delivering bioactive substances to specific molecular targets due to their biocompatibility, biodegradability and low toxicity. Liposomes are therefore considered to be an invaluable asset in applied biotechnology studies due to their potential for interaction with both hydrophilic and lipophilic compounds.
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Affiliation(s)
- Ana Maria Sper Simão
- Departmento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Maytê Bolean
- Departmento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Thuanny Alexandra Campos Cury
- Departmento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Rodrigo Guerino Stabeli
- Centro de Nanotecnologia Aplicada a Saúde-Nanosus, Presidência da Fiocruz, Rua Prof. Algacyr Munhoz Mader, 3775, 81350-010, Curitiba, PR, Brazil.,Brasil e Universidade Federal de Rondônia, Porto Velho, Rondônia, Brazil
| | - Rosangela Itri
- Depto. Física Aplicada, Instituto de Física, IF-USP, São Paulo, SP, Brazil
| | - Pietro Ciancaglini
- Departmento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil.
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49
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Pedrera L, Gomide AB, Sánchez RE, Ros U, Wilke N, Pazos F, Lanio ME, Itri R, Fanani ML, Alvarez C. The Presence of Sterols Favors Sticholysin I-Membrane Association and Pore Formation Regardless of Their Ability to Form Laterally Segregated Domains. Langmuir 2015; 31:9911-9923. [PMID: 26273899 DOI: 10.1021/acs.langmuir.5b01687] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Sticholysin I (St I) is a pore-forming toxin (PFT) produced by the Caribbean Sea anemone Stichodactyla helianthus belonging to the actinoporin protein family, a unique class of eukaryotic PFT. As for actinoporins, it has been proposed that the presence of cholesterol (Chol) and the coexistence of lipid phases increase binding to the target membrane and pore-forming ability. However, little is known about the role of membrane structure and dynamics (phase state, fluidity, and the presence of lipid domains) on the activity of actinoporins or which regions of the membrane are the most favorable for protein insertion, oligomerization, and eventually pore formation. To gain insight into the role of membrane properties on the functional activity of St I, we studied its binding to monolayers and vesicles of phosphatidylcholine (PC), sphingomyelin (SM), and sterols inducing (ergosterol -Erg and cholesterol -Chol) or not (cholestenone - Cln) membrane phase segregation in liquid ordered (Lo) and liquid disordered (Ld) domains. This study revealed that St I binds and permeabilizes with higher efficiency sterol-containing membranes independently of their ability to form domains. We discuss the results in terms of the relevance of different membrane properties for the actinoporins mechanism of action, namely, molecular heterogeneity, specially potentiated in membranes with sterols inducers of phase separation (Chol or Erg) or Cln, a sterol noninducer of phase separation but with a high propensity to induce nonlamellar phase. The role of the Ld phase is pointed out as the most suitable platform for pore formation. In this regard, such regions in Chol-containing membranes seem to be the most favored due to its increased fluidity; this property promotes toxin insertion, diffusion, and oligomerization leading to pore formation.
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Affiliation(s)
- Lohans Pedrera
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
| | - Andreza B Gomide
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo , 05508090, São Paulo, Brasil
- Centro Universitário Padre Anchieta, Jundiaí , 13207270, São Paulo, Brasil
| | - Rafael E Sánchez
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
| | - Uris Ros
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
| | - Natalia Wilke
- Departamento de Química Biológica, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Facultad de Ciencias Químicas-CONICET, Universidad Nacional de Córdoba , X5000HUA Córdoba, Argentina
| | - Fabiola Pazos
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
| | - María E Lanio
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
| | - Rosangela Itri
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo , 05508090, São Paulo, Brasil
| | - María Laura Fanani
- Departamento de Química Biológica, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Facultad de Ciencias Químicas-CONICET, Universidad Nacional de Córdoba , X5000HUA Córdoba, Argentina
| | - Carlos Alvarez
- Centro de Estudio de Proteínas (CEP), Facultad de Biología, Universidad de la Habana , CP 10400, La Habana, Cuba
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Belotto R, Santos R, Tardivo J, Berardinelli I, Filho R, Baptista M, Itri R, Chavantes M, Teixeira D. Clinical response of vulvar cutaneous lymphangioma to photodynamic therapy: Case report. Photodiagnosis Photodyn Ther 2015. [DOI: 10.1016/j.pdpdt.2015.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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