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Domínguez SE, Vuolle A, Fattori A, Ääritalo T, Cangiotti M, Damlin P, Ottaviani MF, Kvarnström C. Enhancement of charge-assisted hydrogen bond capabilities due to O-alkylation proximity in alkoxy cationic polythiophenes: solution- and solid-state evidence via EPR, AFM and surface free energy. Phys Chem Chem Phys 2022; 24:6011-6025. [PMID: 35199803 DOI: 10.1039/d1cp04792b] [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] [Indexed: 11/21/2022]
Abstract
Despite the array of applications for cationic polythiophenes (CPTs), there is still a need for structure-function guidelines and mechanistic understanding of their solution- and solid-state properties. This work presents a solution- and solid-state investigation of the effect of O-alkylation proximity on the hydrogen bonding (H-bonding) capabilities of alkoxy-CPTs, based on comparing an imidazolium alkoxy CPT with strong cation-pi, pi+ and positive charge-assisted hydrogen bonding (+CAHB) capabilities (PIMa), with two isothiouronium alkoxy CPTs with two-point +CAHB capabilities (PT1 & PT2), which have short and long alkoxy side chains, respectively. Our results show that a closer proximity of O-alkylation strengthens the +CAHB capabilities of PT1: in aqueous solutions, PT2 aggregates have a stronger interaction with cationic EPR spin probes than aggregates of PIMa and PT1, which in turn show a similar extent of repulsion towards the cationic spin probes. In solid-state, atomic force microscopy (AFM) shows that PIMa generates dendritic structures onto mica, with features of diffusion-limited aggregation (DLA), indicating strong interactions with the anionic substrate due to a high configurational entropy during spreading, regardless of being drop-casted from water or 1,4-dioxane-water (W-DI), despite the latter disturbing H-bonding due to selective solvation. PT1 is also capable of generating dendritic structures resembling ballistic aggregation (BA). However, this occurs only when casting from water, since W-DI generates island-like aggregates resembling attachment limited aggregation (ALA), which is the morphology generated by PT2 regardless of the solvent. Finally, spin-coated films of PIMa and PT1 show similar dispersivity of the surface free energy (SFE), which in turn is larger than that in PT2 films, which are also more affected when casted from W-DI, presenting much larger decreases of dispersivity. These results constitute a novel empirical structure-function guideline that could be useful for optimal design and/or processing of alkoxy CPTs. For example, dendritic patterns have recently gained attention since the colloidal droplet drying is related to engineering applications including inkjet printing, biosensing, and functional material design, while the SFE is relevant for opto- and bio-electronic applications of conjugated polyelectrolytes (CPEs). This information could also be useful when analyzing previous results obtained from alkoxy CPTs with different side chain lengths.
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Affiliation(s)
- Sergio E Domínguez
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Antti Vuolle
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Alberto Fattori
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Timo Ääritalo
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Michela Cangiotti
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Pia Damlin
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - M Francesca Ottaviani
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Carita Kvarnström
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
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Giordani M, Mattioli M, Cangiotti M, Fattori A, Ottaviani MF, Betti M, Ballirano P, Pacella A, Di Giuseppe D, Scognamiglio V, Hanuskova M, Gualtieri AF. Characterisation of potentially toxic natural fibrous zeolites by means of electron paramagnetic resonance spectroscopy and morphological-mineralogical studies. Chemosphere 2022; 291:133067. [PMID: 34838598 DOI: 10.1016/j.chemosphere.2021.133067] [Citation(s) in RCA: 3] [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: 08/02/2021] [Revised: 10/27/2021] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
This study explored the morphological, mineralogical, and physico-chemical features of carcinogenic erionite and other possibly hazardous zeolites, such as mesolite and thomsonite, while also investigating the interacting capability of the mineral surface at the liquid/solid interface. Extremely fibrous erionite is K+ and Ca2+-rich and shows the highest Si/Al ratio (3.38) and specific surface area (8.14 m2/g). Fibrous mesolite is Na+ and Ca2+-rich and displays both a lower Si/Al ratio (1.56) and a smaller specific surface area (1.56 m2/g). The thomsonite composition shows the lowest values of Si/Al ratio (1.23) and specific surface area (0.38 m2/g). Electron paramagnetic resonance data from selected spin probes reveal that erionite has a homogeneous site distribution and interacts well with all spin probes. The surfaces of mesolite and thomsonite are less homogeneous and closer polar sites were found through consequent interaction with the probes. The mesolite surface can also clearly interact but with a lower strength and may represent a potential health hazard for humans, though with a lower degree if compared to erionite. The thomsonite surface is not inert and interacts with the probes with a low-grade capability. We can expect small fragments of thomsonite to interact with the biological environment, though with a low-grade intensity.
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Affiliation(s)
- Matteo Giordani
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, 61029, Urbino, Italy
| | - Michele Mattioli
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, 61029, Urbino, Italy.
| | - Michela Cangiotti
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, 61029, Urbino, Italy
| | - Alberto Fattori
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, 61029, Urbino, Italy
| | | | - Michele Betti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029, Urbino, Italy
| | - Paolo Ballirano
- Department of Earth Sciences, Sapienza University of Rome, 00185, Rome, Italy
| | - Alessandro Pacella
- Department of Earth Sciences, Sapienza University of Rome, 00185, Rome, Italy
| | - Dario Di Giuseppe
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, I-41125, Modena, Italy
| | - Valentina Scognamiglio
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, I-41125, Modena, Italy
| | - Miriam Hanuskova
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, I-41125, Modena, Italy
| | - Alessandro F Gualtieri
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, I-41125, Modena, Italy
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Fattori A, Cantù F, Comotti A, Tombola V, Colombo E, Nava C, Bordini L, Riboldi L, Bonzini M, Brambilla P. Hospital workers mental health during the COVID-19 pandemic: methods of data collection and characteristics of study sample in a university hospital in Milan (Italy). BMC Med Res Methodol 2021; 21:163. [PMID: 34376151 PMCID: PMC8353421 DOI: 10.1186/s12874-021-01355-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 07/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The COVID-19 pandemic is currently a severe challenge for healthcare workers, with a considerable impact on their mental health. In order to focus preventive and rehabilitation measures it's fundamental to identify risk factors of such psychological impairment. We designed an observational longitudinal study to systematically examine the psychological wellbeing of all employees in a large University Hospital in Italy, using validated psychometric scales in the context of the occupational physician's health surveillance, in collaboration with Psychiatric Unit. METHODS The study started after ethical approval in August 2020. For each worker, the psychological wellbeing is screened in two steps. The first level questionnaire collects sociodemographic characteristics, personal and occupational COVID-19 exposure, worries and concerns about COVID-19, general psychological discomfort (GHQ-12), post-traumatic stress symptoms (IES-R) and anxiety (GAD-7). Workers who score above the cut-off in at least one scale are further investigated by the second level questionnaire composed by PHQ-9, DES-II and SCL-90. If second level shows psychological impairments, we offer individual specialist treatment (third level). We plan to follow-up all subjects to monitor symptoms and possible chronicization; we aim to investigate potential risk factors through univariate analysis and multivariate logistic regressions. RESULTS Preliminary results refer to a sample of 550 workers who completed the multi-step evaluation from August to December 2020, before vaccination campaign started. The participation rate was 90%. At first level screening, 39% of the subjects expressed general psychological discomfort (GHQ-12), 22% post-traumatic stress symptoms (IES-R), and 21% symptoms of anxiety (GAD-7). Women, nurses, younger workers, subjects with COVID-19 working exposure and with an infected family member showed significantly higher psychological impairment compared to colleagues. After the second level screening, 12% and 7% of all workers showed, respectively, depressive and dissociative symptoms; scorings were significantly associated with gender and occupational role. We are currently extending sample size and evaluating subjects over a period of further 12 months. CONCLUSIONS The possibility to perform a systematic follow-up of psychological wellbeing of all hospital workers, directly or indirectly exposed to pandemic consequences, constitutes a unique condition to detect individual, occupational, and non-occupational risk factors for psychological impairment in situations of prolonged stress, as well as variables associated with symptoms chronicization.
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Affiliation(s)
- A Fattori
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
| | - F Cantù
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - A Comotti
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - V Tombola
- Department of Neurosciences and Mental Health, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - E Colombo
- Department of Neurosciences and Mental Health, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - C Nava
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - L Bordini
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - L Riboldi
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - M Bonzini
- Occupational Health Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Science and Community Health, University of Milan, Milan, Italy
| | - P Brambilla
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Department of Neurosciences and Mental Health, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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Canonico B, Carloni R, Sanz del Olmo N, Papa S, Nasoni MG, Fattori A, Cangiotti M, de la Mata FJ, Ottaviani MF, García-Gallego S. Fine-Tuning the Interaction and Therapeutic Effect of Cu(II) Carbosilane Metallodendrimers in Cancer Cells: An In Vitro Electron Paramagnetic Resonance Study. Mol Pharm 2020; 17:2691-2702. [DOI: 10.1021/acs.molpharmaceut.0c00396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Barbara Canonico
- Department of Biomolecular Science (DiSB), University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - Riccardo Carloni
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - Natalia Sanz del Olmo
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry “Andrés M. del Río” (IQAR), University of Alcalá, Madrid 28871, Spain
| | - Stefano Papa
- Department of Biomolecular Science (DiSB), University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - Maria Gemma Nasoni
- Department of Biomolecular Science (DiSB), University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - Alberto Fattori
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - Michela Cangiotti
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, Urbino 61029, Italy
| | - F. Javier de la Mata
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry “Andrés M. del Río” (IQAR), University of Alcalá, Madrid 28871, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid 28034, Spain
| | | | - Sandra García-Gallego
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry “Andrés M. del Río” (IQAR), University of Alcalá, Madrid 28871, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid 28034, Spain
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Domínguez SE, Vuolle A, Cangiotti M, Fattori A, Ääritalo T, Damlin P, Ottaviani MF, Kvarnström C. Cationic Imidazolium Polythiophenes: Effects of Imidazolium-Methylation on Solution Concentration-Driven Aggregation and Surface Free Energy of Films Processed from Solvents with Different Polarity. Langmuir 2020; 36:2278-2290. [PMID: 32027512 PMCID: PMC7497652 DOI: 10.1021/acs.langmuir.9b03095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/13/2020] [Indexed: 06/10/2023]
Abstract
Cationic imidazolium-functionalized polythiophenes with single- or double-methylation of the imidazolium ring were used to study the impact of imidazolium-methylation on (i) the solution concentration-driven aggregation in the presence of paramagnetic probes with different ionic and hydrophobic constituents and (ii) their surface free energy (SFE) as spin-coated films deposited on plasma-activated glass. Electron paramagnetic resonance spectroscopy shows that the differences in film structuration between the polymers with different methylations originate from the early stages of aggregation. In the solid state, higher degree of imidazolium-methylation generates smaller values of total SFE, γS, (by around 2 mN/m), which could be relevant in optoelectronic applications. Methylation also causes a decrease in the polar contribution of γS (γSp), suggesting that methylation decreases the polar nature of the imidazolium ring, probably due to the blocking of its H-bonding capabilities. The values of γS obtained in the present work are similar to the values obtained for doped films of neutral conjugated polymers, such as polyaniline, poly(3-hexylthiophene), and polypyrrole. However, imidazolium-polythiophenes generate films with a larger predominance of the dispersive component of γS (γSd), probably due to the motion restriction in the ionic functionalities in a conjugated polyelectrolyte, in comparison to regular dopants. The presence of 1,4-dioxane increases γSp, especially, in the polymer with larger imidazolium-methylation (and therefore unable to interact through H-bonding), probably by a decrease of the imidazolium-glass interactions. Singly-methylated imidazolium polythiophenes have been applied as electrode selective ("buffer") interlayers in conventional and inverted organic solar cells, improving their performance. However, clear structure-function guidelines are still needed for designing high-performance polythiophene-based interlayer materials. Therefore, the information reported in this work could be useful for such applications.
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Affiliation(s)
- Sergio E. Domínguez
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Antti Vuolle
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Michela Cangiotti
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Alberto Fattori
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Timo Ääritalo
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Pia Damlin
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - M. Francesca Ottaviani
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Carita Kvarnström
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
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Chevrier M, Fattori A, Lasser L, Kotras C, Rose C, Cangiotti M, Beljonne D, Mehdi A, Surin M, Lazzaroni R, Dubois P, Ottaviani MF, Richeter S, Bouclé J, Clément S. In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based "All Solid-State" Dye-Sensitized Solar Cells. Molecules 2020; 25:E198. [PMID: 31947792 PMCID: PMC6983229 DOI: 10.3390/molecules25010198] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/21/2019] [Accepted: 12/28/2019] [Indexed: 11/16/2022] Open
Abstract
Chlorophyll a derivatives were integrated in "all solid-state" dye sensitized solar cells (DSSCs) with a mesoporous TiO2 electrode and 2',2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene as the hole-transport material. Despite modest power conversion efficiencies (PCEs) between 0.26% and 0.55% achieved for these chlorin dyes, a systematic investigation was carried out in order to elucidate their main limitations. To provide a comprehensive understanding of the parameters (structure, nature of the anchoring group, adsorption …) and their relationship with the PCEs, density functional theory (DFT) calculations, optical and photovoltaic studies and electron paramagnetic resonance analysis exploiting the 4-carboxy-TEMPO spin probe were combined. The recombination kinetics, the frontier molecular orbitals of these DSSCs and the adsorption efficiency onto the TiO2 surface were found to be the key parameters that govern their photovoltaic response.
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Affiliation(s)
- Michèle Chevrier
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
- Service des Matériaux Polymères et Composites (SMPC), Centre d’Innovation et de Recherche en Matériaux et Polymères (CIRMAP), Université de Mons, 20 Place du Parc, 7000 Mons, Belgium;
| | - Alberto Fattori
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy; (A.F.); (M.C.); (M.F.O.)
| | - Laurent Lasser
- Laboratory for Chemistry of Novel Materials, CIRMAP, University of Mons UMONS, 20 Place du Parc, 7000 Mons, Belgium; (L.L.); (D.B.); (M.S.); (R.L.)
| | - Clément Kotras
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
- Laboratory for Chemistry of Novel Materials, CIRMAP, University of Mons UMONS, 20 Place du Parc, 7000 Mons, Belgium; (L.L.); (D.B.); (M.S.); (R.L.)
| | - Clémence Rose
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
| | - Michela Cangiotti
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy; (A.F.); (M.C.); (M.F.O.)
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, CIRMAP, University of Mons UMONS, 20 Place du Parc, 7000 Mons, Belgium; (L.L.); (D.B.); (M.S.); (R.L.)
| | - Ahmad Mehdi
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
| | - Mathieu Surin
- Laboratory for Chemistry of Novel Materials, CIRMAP, University of Mons UMONS, 20 Place du Parc, 7000 Mons, Belgium; (L.L.); (D.B.); (M.S.); (R.L.)
| | - Roberto Lazzaroni
- Laboratory for Chemistry of Novel Materials, CIRMAP, University of Mons UMONS, 20 Place du Parc, 7000 Mons, Belgium; (L.L.); (D.B.); (M.S.); (R.L.)
| | - Philippe Dubois
- Service des Matériaux Polymères et Composites (SMPC), Centre d’Innovation et de Recherche en Matériaux et Polymères (CIRMAP), Université de Mons, 20 Place du Parc, 7000 Mons, Belgium;
| | - Maria Francesca Ottaviani
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy; (A.F.); (M.C.); (M.F.O.)
| | - Sébastien Richeter
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
| | - Johann Bouclé
- CNRS, Univ. Limoges, XLIM, UMR 7252, F-87000 Limoges, France
| | - Sébastien Clément
- ICGM, Univ. Montpellier, CNRS, ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier, France; (M.C.); (C.K.); (C.R.); (A.M.)
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Casabianca S, Capellacci S, Penna A, Cangiotti M, Fattori A, Corsi I, Ottaviani MF, Carloni R. Physical interactions between marine phytoplankton and PET plastics in seawater. Chemosphere 2020; 238:124560. [PMID: 31437632 DOI: 10.1016/j.chemosphere.2019.124560] [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: 05/17/2019] [Revised: 07/24/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Plastics are the most abundant marine debris globally dispersed in the oceans and its production is rising with documented negative impacts in marine ecosystems. However, the chemical-physical and biological interactions occurring between plastic and planktonic communities of different types of microorganisms are poorly understood. In these respects, it is of paramount importance to understand, on a molecular level on the surface, what happens to plastic fragments when dispersed in the ocean and directly interacting with phytoplankton assemblages. This study presents a computer-aided analysis of electron paramagnetic resonance (EPR) spectra of selected spin probes able to enter the phyoplanktonic cell interface and interact with the plastic surface. Two different marine phytoplankton species were analyzed, such as the diatom Skeletonema marinoi and dinoflagellate Lingulodinium polyedrum, in absence and presence of polyethylene terephthalate (PET) fragments in synthetic seawater (ASPM), in order to in-situ characterize the interactions occurring between the microalgal cells and plastic surfaces. The analysis was performed at increasing incubation times. The cellular growth and adhesion rates of microalgae in batch culture medium and on the plastic fragments were also evaluated. The data agreed with the EPR results, which showed a significant difference in terms of surface properties between the diatom and dinoflagellate species. Low-polar interactions of lipid aggregates with the plastic surface sites were mainly responsible for the cell-plastic adhesion by S. marinoi, which is exponentially growing on the plastic surface over the incubation time.
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Affiliation(s)
- Silvia Casabianca
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy.
| | - Samuela Capellacci
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy
| | - Antonella Penna
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy
| | - Michela Cangiotti
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Alberto Fattori
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Maria Francesca Ottaviani
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Riccardo Carloni
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy.
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Prigat Y, Fattori A, Shames AI, Ottaviani MF, Garti N. Micro-characterization of modified microemulsions loaded with gossypol, pure and extracted from cottonseed. Colloids Surf B Biointerfaces 2019; 180:487-494. [PMID: 31102853 DOI: 10.1016/j.colsurfb.2019.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 03/16/2019] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/14/2022]
Abstract
Microemulsions (MEs) have gained increasing interest as carriers of hydrophobic bioactives in the last decades. However, it is still difficult to control the uptake and the release of bioactives directly extracted from plants. In this study, modified ME nanodroplets (nano-sized self-assembled liquids, NSSLs) were employed as extraction medium of gossypol, a toxic component of cottonseed. Loading was performed using both pure gossypol, and gossypol obtained by extraction from cottonseed. We achieved two goals: i) remove gossypol from cottonseed to obtain cotton-oil free of gossypol; and ii) extract gossypol directly into a nano-delivery vehicle for biomedical purposes. Structural and dynamical information on the unloaded and gossypol-loaded NSSL systems were obtained by self-diffusion nuclear magnetic resonance, SD-NMR, and spin-probe electron paramagnetic resonance (EPR) studies. The results showed that NSSL formed fluid water-in-oil (W/O) nano domains at the lowest water contents; a more viscous bicontinuous structure at comparable oil and water contents, and, finally, oil-in-water (O/W, micellar-like) at the higher concentration of water. These micellar-like structures were more fluid at the external hydrated surface, as demonstrated by SD-NMR, while the lipidic region tested by EPR revealed an increasing packing. In all these structures, gossypol mainly localized in the lipophilic region close to the water interface. Overall, SD-NMR and EPR provided complementary information, helping to clarify the structural properties of NSSLs formed at different water contents and their ability to incorporate gossypol also directly from cottonseed-NSSL mixtures.
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Affiliation(s)
- Yael Prigat
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Alberto Fattori
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, Via Ca' le Suore 2/4, Urbino 61029, Italy
| | - Alexander I Shames
- Department of Physics, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 8410501, Israel
| | - Maria Francesca Ottaviani
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, Via Ca' le Suore 2/4, Urbino 61029, Italy.
| | - Nissim Garti
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel.
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9
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Sanz Del Olmo N, Carloni R, Bajo AM, Ortega P, Fattori A, Gómez R, Ottaviani MF, García-Gallego S, Cangiotti M, de la Mata FJ. Insight into the antitumor activity of carbosilane Cu(ii)-metallodendrimers through their interaction with biological membrane models. Nanoscale 2019; 11:13330-13342. [PMID: 31271405 DOI: 10.1039/c9nr03313k] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Current cancer therapies present serious drawbacks including severe side-effects and development of drug resistance. Strategies based on nanosized metallodrugs combine the structural diversity and non-classical modes of action of metal complexes with the selectivity arising from the unique interaction of nanoparticles with biological membranes. A new family of water-soluble copper(ii) carbosilane metallodendrimers was synthesized and characterized as a nanotechnological alternative to current therapies. The interactions occurring over time between the dendrimers, at different generations (G0 to G2) and with different Cu(ii) counter-ions (nitrate vs. chloride), and cell-membrane models (cethyl-trimethylammonium bromide (CTAB) micelles and lecithin liposomes) were investigated using a computer-aided analysis of the electron paramagnetic resonance (EPR) spectra. The EPR analysis provided structural and dynamical information on the systems indicating that the increase in generation and the change of the Cu(ii) contra-ion - from nitrate to chloride - produce an increased relative amount and strength of interaction of the dendrimer with the model membranes. Interestingly, the stabilization effect produced a lower toxicity towards cancer cells. The cytotoxic effect of Cu(ii) metallodendrimers was verified by an in vitro screening in a selection of tumor cell lines, revealing the impact of multivalency on the effectivity and selectivity of the metallodrugs. As a proof-of-concept, first-generation dendrimer G1-Cu(ONO2)2 was selected for in-depth in vitro and in vivo antitumor evaluation towards resistant prostate cancer. The Cu(ii)-metallodendrimers produced a significant tumor size reduction with no signs of toxicity during the experiment, confirming their promising potential as anticancer metallodrugs.
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Affiliation(s)
- Natalia Sanz Del Olmo
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry "Andrés M. del Río" (IQAR), University of Alcalá, Madrid, Spain.
| | - Riccardo Carloni
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Urbino, Italy.
| | - Ana M Bajo
- Department of Biology of Systems, Biochemistry and Molecular Biology Unit, University of Alcalá, Madrid, Spain
| | - Paula Ortega
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry "Andrés M. del Río" (IQAR), University of Alcalá, Madrid, Spain. and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain and Institute Ramón y Cajal for Health Research (IRYCIS), Spain
| | - Alberto Fattori
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Urbino, Italy.
| | - Rafael Gómez
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry "Andrés M. del Río" (IQAR), University of Alcalá, Madrid, Spain. and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain and Institute Ramón y Cajal for Health Research (IRYCIS), Spain
| | | | - Sandra García-Gallego
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry "Andrés M. del Río" (IQAR), University of Alcalá, Madrid, Spain. and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain and Institute Ramón y Cajal for Health Research (IRYCIS), Spain
| | - Michela Cangiotti
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Urbino, Italy.
| | - F Javier de la Mata
- Department of Organic and Inorganic Chemistry, and Research Institute in Chemistry "Andrés M. del Río" (IQAR), University of Alcalá, Madrid, Spain. and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain and Institute Ramón y Cajal for Health Research (IRYCIS), Spain
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10
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Abramov E, Ottaviani MF, Shames AI, Fattori A, Garti N. Structural Characterization of Reconstituted Bioactive-Loaded Nanodomains after Embedding in Films Using Electron Paramagnetic Resonance and Self-Diffusion Nuclear Magnetic Resonance Techniques. Langmuir 2019; 35:7879-7886. [PMID: 31120758 DOI: 10.1021/acs.langmuir.9b00578] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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
Pharmaceutical applications of microemulsions (MEs) as drug delivery vehicles are recently gaining scientific and practical interests. Most MEs are able to solubilize bioactive molecules, but, at present, they cannot guarantee either controlled release of the drugs or significant advantage in the bioavailability of the bioactives. This study proposes to incorporate the modified ME structures, or nanodomains, into a natural polymeric film, to be used as a stable and capacious reservoir of drug-loaded nanodomains. These nanodomain-loaded films may release the nanodroplets along with the drug molecules in a slow and controlled way. Gellan gum, an anionic polysaccharide, was used in aqueous solution as the film former, and curcumin, hydrophobic polyphenol, served as the guest molecule in the loaded systems. Films were prepared by using empty and curcumin-loaded MEs. It is imperative to verify the persistence of the ME structure upon the dissolution of the film mimicking its behavior when in contact with a human physiological aqueous environment via reaching the cell membranes. For this purpose, the films were dissolved, and the reconstituted ME structure was compared with the ME structure before film formation. Characterization of these structures, before and after dissolution, was achieved using electron paramagnetic resonance (EPR) and self-diffusion nuclear magnetic resonance (SD-NMR) techniques. Specific spin probes were inserted in the system, and a computer-aided analysis of the EPR spectra was performed to provide information on nanodomain microstructure assemblies. In addition, the SD-NMR profile of each component was analyzed to extract information on the diffusivity of the ME components before film formation and after ME reconstitution. The EPR and SD-NMR results were in good agreement to each other. The most important finding was that, after film dissolution, the ME nanodomains were reversibly and spontaneously reformed. It was also found that the film did not perturb the ME-nanodomain structure embedded in it. The film remained transparent and the bioactive curcumin was easily solubilized into the ME-droplet/water interface even after film dissolution. The combined techniques confirmed that the film constituted by bioactive-loaded MEs can serve as novel drug delivery vehicles.
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Affiliation(s)
- Eva Abramov
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry , The Hebrew University of Jerusalem , Edmond J. Safra Campus , Givat Ram, Jerusalem 91904 , Israel
| | - Maria Francesca Ottaviani
- Department of Pure and Applied Sciences (DiSPeA) , University of Urbino , Via Ca' le Suore 2/4 , Urbino 61029 , Italy
| | - Alexander I Shames
- Department of Physics , Ben-Gurion University of the Negev , P.O. Box 653, Beer-Sheva 8410501 , Israel
| | - Alberto Fattori
- Department of Pure and Applied Sciences (DiSPeA) , University of Urbino , Via Ca' le Suore 2/4 , Urbino 61029 , Italy
| | - Nissim Garti
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry , The Hebrew University of Jerusalem , Edmond J. Safra Campus , Givat Ram, Jerusalem 91904 , Israel
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11
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Abstract
This study evaluated the association between anorexia of aging and nutrients intake. It was a cross-sectional study with 130 individuals aged 60 years or older, undergoing outpatient care in the city of Campinas, São Paulo. Anorexia of Aging (AA) was assessed using the Simplified Nutrition Appetite Questionnaire (SNAQ), and food consumption was evaluated using the 24-hour recall (24HR). The prevalence of AA was 27.7%, in which 66.7% were women and 38.9% were older than 80 years. Elderly with AA presented lower intake of calories (1172.6 kcal vs 1477.9 kcal; p = 0.003), carbohydrates (158.5 g vs 194.1 g; p = 0.015), proteins (49.9 g vs 68.5 g; p = 0.004) and lipids (34.6 g vs 46.1 g; p = 0.006). They also had lower intake of fibers (12.6 g vs 19.4 g; p < 0.001), iron (6.4 mg vs 8.9 mg; p < 0.001) and zinc (6.0 mg vs 8.5 mg; p = 0.004). Our results show that intake of most nutrients is significantly lower in AA elderly, except carbohydrates, which may point to worse-quality diets. The diagnosis of AA, as well as the evaluation of elderly food intake, are essential to prevent undernutrition, vulnerabilities, and increased morbidity and mortality.
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Affiliation(s)
- L M Hara
- L. M. Hara, School of Applied Sciences, University of Campinas, St. Pedro Zaccaria, 1300, ZIP code 13484-350, Limeira, SP, Brazil, Tel.: +55 (19) 3701-6758, E-mail:
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12
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Domínguez SE, Cangiotti M, Fattori A, Ääritalo T, Damlin P, Ottaviani MF, Kvarnström C. Effect of Spacer Length and Solvent on the Concentration-Driven Aggregation of Cationic Hydrogen-Bonding Donor Polythiophenes. Langmuir 2018; 34:7364-7378. [PMID: 29783844 PMCID: PMC6150719 DOI: 10.1021/acs.langmuir.8b00808] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 05/02/2018] [Indexed: 06/08/2023]
Abstract
Aggregation of cationic isothiouronium polythiophenes with alkoxy-spacers of different lengths at the 3-position of the thiophene ring was studied in solvents of different polarities. Hydrogen-bonding capacity was assessed by steady-state absorption and fluorescence spectroscopy, whereas the aggregation in aqueous solutions was studied by electron paramagnetic resonance spectroscopy, using paramagnetic probes of different polarities. The two polymers displayed similar features in respect to conformation, effect of cosolvents on aggregation, unstructured absorption-fluorescence spectra, Stokes shifts when aggregated, solvatochromic effect, and self-quenching concentration. However, these polymers also showed different specific interactions with water, Stokes shifts in water, effect of the solvent on the extent of dominant state of the S1 level, and also different inner cavities and hydrophobic-hydrophilic surface area in aqueous solution aggregates. Water maximized the difference between the polymers concerning the effect of specific increases in concentration, whereas the presence of 1,4-dioxane generated almost identical effects on both polymers.
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Affiliation(s)
- S. E. Domínguez
- Turku
University Centre for Materials and Surfaces (MATSURF), Laboratory
of Materials Chemistry and Chemical Analysis, University of Turku, 20014 Turku, Finland
| | - M. Cangiotti
- Department
of Earth, Life and Environment Sciences (DiSTeVA), University of Urbino, Via Ca’ Le Suore 2/4, 61029 Urbino, Italy
| | - A. Fattori
- Department
of Earth, Life and Environment Sciences (DiSTeVA), University of Urbino, Via Ca’ Le Suore 2/4, 61029 Urbino, Italy
| | - T. Ääritalo
- Turku
University Centre for Materials and Surfaces (MATSURF), Laboratory
of Materials Chemistry and Chemical Analysis, University of Turku, 20014 Turku, Finland
| | - P. Damlin
- Turku
University Centre for Materials and Surfaces (MATSURF), Laboratory
of Materials Chemistry and Chemical Analysis, University of Turku, 20014 Turku, Finland
| | - M. F. Ottaviani
- Department
of Earth, Life and Environment Sciences (DiSTeVA), University of Urbino, Via Ca’ Le Suore 2/4, 61029 Urbino, Italy
| | - C. Kvarnström
- Turku
University Centre for Materials and Surfaces (MATSURF), Laboratory
of Materials Chemistry and Chemical Analysis, University of Turku, 20014 Turku, Finland
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13
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Peña-González CE, García-Broncano P, Ottaviani MF, Cangiotti M, Fattori A, Hierro-Oliva M, González-Martín ML, Pérez-Serrano J, Gómez R, Muñoz-Fernández MÁ, Sánchez-Nieves J, de la Mata FJ. Dendronized Anionic Gold Nanoparticles: Synthesis, Characterization, and Antiviral Activity. Chemistry 2016; 22:2987-99. [PMID: 26875938 DOI: 10.1002/chem.201504262] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 10/22/2015] [Indexed: 12/23/2022]
Abstract
Anionic carbosilane dendrons decorated with sulfonate functions and one thiol moiety at the focal point have been used to synthesize water-soluble gold nanoparticles (AuNPs) through the direct reaction of dendrons, gold precursor, and reducing agent in water, and also through a place-exchange reaction. These nanoparticles have been characterized by NMR spectroscopy, TEM, thermogravimetric analysis, X-ray photoelectron spectroscopy (XPS), UV/Vis spectroscopy, elemental analysis, and zeta-potential measurements. The interacting ability of the anionic sulfonate functions was investigated by EPR spectroscopy with copper(II) as a probe. Different structures and conformations of the AuNPs modulate the availability of sulfonate and thiol groups for complexation by copper(II). Toxicity assays of AuNPs showed that those produced through direct reaction were less toxic than those obtained by ligand exchange. Inhibition of HIV-1 infection was higher in the case of dendronized AuNPs than in dendrons.
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Affiliation(s)
- Cornelia E Peña-González
- Dpto. de Química Orgánica y Química Inorgánica, Edificio de Farmacia, Universidad de Alcalá, Campus Universitario, Alcalá de Henares (Madrid), Spain
| | - Pilar García-Broncano
- Unidad de Infección Viral e Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Campus Majadahonda, Madrid, Spain.,Laboratorio de InmunoBiología Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.,Spanish HIV HGM BioBank, Madrid, Spain
| | - M Francesca Ottaviani
- Department of Earth, Life and Environment Sciences, University of Urbino, Urbino, 61029, Italy
| | - Michela Cangiotti
- Department of Earth, Life and Environment Sciences, University of Urbino, Urbino, 61029, Italy
| | - Alberto Fattori
- Department of Earth, Life and Environment Sciences, University of Urbino, Urbino, 61029, Italy
| | - Margarita Hierro-Oliva
- Departamento de Física Aplicada, Facultad de Ciencias, Campus Universitario, Universidad de Extremadura, Badajoz, Spain.,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain
| | - M Luisa González-Martín
- Departamento de Física Aplicada, Facultad de Ciencias, Campus Universitario, Universidad de Extremadura, Badajoz, Spain.,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain
| | - Jorge Pérez-Serrano
- Departamento de Biomedicina y Biotecnología, Edificio de Farmacia, Campus Universitario, Universidad de Alcalá, 28871, Alcalá de Henares, Spain
| | - Rafael Gómez
- Dpto. de Química Orgánica y Química Inorgánica, Edificio de Farmacia, Universidad de Alcalá, Campus Universitario, Alcalá de Henares (Madrid), Spain.,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain
| | - M Ángeles Muñoz-Fernández
- Laboratorio de InmunoBiología Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.,Spanish HIV HGM BioBank, Madrid, Spain.,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain
| | - Javier Sánchez-Nieves
- Dpto. de Química Orgánica y Química Inorgánica, Edificio de Farmacia, Universidad de Alcalá, Campus Universitario, Alcalá de Henares (Madrid), Spain. .,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain.
| | - F Javier de la Mata
- Dpto. de Química Orgánica y Química Inorgánica, Edificio de Farmacia, Universidad de Alcalá, Campus Universitario, Alcalá de Henares (Madrid), Spain. .,Networking Research Center for Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, Madrid, Spain.
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14
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Moreno S, Ortega P, de la Mata FJ, Ottaviani MF, Cangiotti M, Fattori A, Muñoz-Fernández MÁ, Gómez R. Bifunctional Chelating Agents Based on Ionic Carbosilane Dendrons with DO3A at the Focal Point and Their Complexation Behavior with Copper(II). Inorg Chem 2015; 54:8943-56. [DOI: 10.1021/acs.inorgchem.5b01047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Silvia Moreno
- Departamento
de Química Orgánica e Inorgánica, Universidad de Alcalá, Edificio de Farmacia 28871, Alcalá de Henares, Spain
- Spain/Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), C/ Poeta Mariano Esquillor s/n 50018, Zaragoza, Spain
| | - Paula Ortega
- Departamento
de Química Orgánica e Inorgánica, Universidad de Alcalá, Edificio de Farmacia 28871, Alcalá de Henares, Spain
- Spain/Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), C/ Poeta Mariano Esquillor s/n 50018, Zaragoza, Spain
| | - Francisco Javier de la Mata
- Departamento
de Química Orgánica e Inorgánica, Universidad de Alcalá, Edificio de Farmacia 28871, Alcalá de Henares, Spain
- Spain/Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), C/ Poeta Mariano Esquillor s/n 50018, Zaragoza, Spain
| | - Maria Francesca. Ottaviani
- Departments
of Earth, Life and Environment Sciences, University of Urbino, Via Ca’ le Suore 2/4, Urbino 61029, Italy
| | - Michela Cangiotti
- Departments
of Earth, Life and Environment Sciences, University of Urbino, Via Ca’ le Suore 2/4, Urbino 61029, Italy
| | - Alberto Fattori
- Departments
of Earth, Life and Environment Sciences, University of Urbino, Via Ca’ le Suore 2/4, Urbino 61029, Italy
| | - María Ángeles Muñoz-Fernández
- Laboratorio
de Inmunobiologia Molecular, Hospital General Universitario Gregorio Marañon, Madrid, Spain
- Spain/Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), C/ Poeta Mariano Esquillor s/n 50018, Zaragoza, Spain
| | - Rafael Gómez
- Departamento
de Química Orgánica e Inorgánica, Universidad de Alcalá, Edificio de Farmacia 28871, Alcalá de Henares, Spain
- Spain/Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), C/ Poeta Mariano Esquillor s/n 50018, Zaragoza, Spain
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15
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Fichera GP, Fattori A, Neri L, Musti M, Coggiola M, Costa G. Post-traumatic stress disorder among bank employee victims of robbery. Occup Med (Lond) 2014; 65:283-9. [DOI: 10.1093/occmed/kqu180] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Fattori A, Cangiotti M, Fiorani L, Lucchi S, Ottaviani MF. Characterization of the TiO2/dye/electrolyte interfaces in dye-sensitized solar cells by means of a titania-binding nitroxide. Langmuir 2014; 30:13570-13580. [PMID: 25348929 DOI: 10.1021/la5033256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dye-sensitized solar cells (DSSCs) have been characterized in several literature examples by using relatively complex methods and/or modified DSSC conditions with respect to the usual working ones. In this study, we propose a method for the investigation of the interfaces TiO2/dye/electrolyte in a DSSC at its usual working conditions. This method implies the use of a computer-aided analysis of the electron paramagnetic resonance (EPR) spectra of the spin probe 4-carboxy-2,2,6,6-tetramethylpiperidine 1-oxyl (4-carboxy-TEMPO, indicated as 4-cT). This probe well-mimics the dyes in their interactions with TiO2 surface, but does not perturb dye adsorption onto TiO2 surface, as verified by UV-vis measurements. First, we investigated the interacting ability toward 4-cT of commercially available TiO2 used for assembling the DSSC. It was found that interactions are modulated by the different distribution of interacting sites at the solid surface and powder aggregation. Further, experiments on 4-cT were carried out in the presence of a series of other molecules coded as N3, N719, and D149, which are commonly used as dyes in DSSCs. Then, the effect of solutions added to the electrodes was investigated. On the basis of the interactions occurring at the TiO2/dye/electrolyte interfaces, we selected the ingredients of the DSSCs. Electrical and EPR characterizations of these DSSCs miniaturized to enter the EPR cavity, together with time-dependent laser-light on-off experiments, were carried out, which demonstrated the ability of the EPR analysis to monitor the types and strengths of the interactions occurring at the cell's different interfaces. This method using the standard continuous wave EPR technique at room temperature may be profitably used to characterize the quality and performances of a DSSC.
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Affiliation(s)
- Alberto Fattori
- Department of Earth, Life and Environment Sciences (DiSTeVA), University of Urbino , 61029 Urbino, Italy
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17
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Angelov V, Velichkova H, Ivanov E, Kotsilkova R, Delville MH, Cangiotti M, Fattori A, Ottaviani MF. EPR and rheological study of hybrid interfaces in gold-clay-epoxy nanocomposites. Langmuir 2014; 30:13411-21. [PMID: 25330464 DOI: 10.1021/la503361k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
With the aim to obtain new materials with special properties to be used in various industrial and biomedical applications, ternary "gold-clay-epoxy" nanocomposites and their nanodispersions were prepared using clay decorated with gold nanoparticles (AuNPs), at different gold contents. Nanocomposites structure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Rheology and electron paramagnetic resonance (EPR) techniques were used in order to evaluate the molecular dynamics in the nanodispersions, as well as dynamics at interfaces in the nanocomposites. The percolation threshold (i.e., the filler content related to the formation of long-range connectivity of particles in the dispersed media) of the gold nanoparticles was determined to be ϕp = 0.6 wt % at a fixed clay content of 3 wt %. The flow activation energy and the relaxation time spectrum illustrated the presence of interfacial interactions in the ternary nanodispersions around and above the percolation threshold of AuNPs; these interfacial interactions suppressed the global molecular dynamics. It was found that below ϕp the free epoxy polymer chains ratio dominated over the chains attracted on the gold surfaces; thus, the rheological behavior was not significantly changed by the presence of AuNPs. While, around and above ϕp, the amount of the bonded epoxy polymer chains on the gold surface was much higher than that of the free chains; thus, a substantial increase in the flow activation energy and shift in the spectra to higher relaxation times appeared. The EPR signals of the nanocomposites depended on the gold nanoparticle contents and the preparation procedure thus providing a fingerprint of the different nanostructures. The EPR results from spin probes indicated that the main effect of the gold nanoparticles above ϕp, was to form a more homogeneous, viscous and polar clay-epoxy mixture at the nanoparticle surface. The knowledge obtained from this study is applicable to understand the role of interfaces in ternary nanocomposites with different combinations of nanofillers.
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Affiliation(s)
- Verislav Angelov
- Open Laboratory on Experimental Micro and Nano Mechanics, Institute of Mechanics, Bulgarian Academy of Sciences , Acad. G. Bonchev Street, Block 4, 1113 Sofia, Bulgaria
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18
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Ottaviani MF, Cangiotti M, Fattori A, Coppola C, Posocco P, Laurini E, Liu X, Liu C, Fermeglia M, Peng L, Pricl S. Copper(II) binding to flexible triethanolamine-core PAMAM dendrimers: a combined experimental/in silico approach. Phys Chem Chem Phys 2014; 16:685-94. [PMID: 24256926 DOI: 10.1039/c3cp54005g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The structure of copper(II) complexes formed with triethanolamine (TEA) core poly(amidoamine) (PAMAM) dendrimers from generation 0 (G0) to 4 (G4) were investigated by the electron paramagnetic resonance (EPR) technique and molecular simulations. Different square planar coordination modes were detected as a function of copper(II) concentration, whose dynamic evolution relates to the high structural flexibility peculiar to this dendrimer family. Modulated by generation and solvation effects, copper(II) complexation begins at the dendrimer core and progresses to the dendrimer periphery. Differently from the ethylenediamine (EDA) core PAMAM dendrimers, the copper complexes involving the TEA core showed high mobility and saturation of the internal sites above the 1 : 1 molar ratio between the dendrimers and the ions. Therefore, by combining EPR and molecular simulations for the first time, ultimately we obtained unique information on structure, dynamics and copper interacting ability of these dendrimers which could be successfully exploited in biomedical applications.
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Affiliation(s)
- Maria Francesca Ottaviani
- Department of Earth, Life and Environment Sciences, University of Urbino, Località Crocicchia, 61029 Urbino, Italy.
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19
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Ottaviani MF, Cangiotti M, Fattori A, Coppola C, Lucchi S, Ficker M, Petersen JF, Christensen JB. Copper(II) complexes with 4-carbomethoxypyrrolidone functionalized PAMAM-dendrimers: an EPR study. J Phys Chem B 2013; 117:14163-72. [PMID: 24152031 DOI: 10.1021/jp410307z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The internal flexibility and interacting ability of PAMAM-dendrimers having 4-carbomethoxypyrrolidone-groups as surface groups (termed Gn-Pyr), which may be useful for biomedical purposes, and ion traps were investigated by analyzing the EPR spectra of their copper(II) complexes. Increasing amounts (with respect to the Pyr groups) of copper(II) gave rise to different signals constituting the EPR spectra at room and low temperature corresponding to different coordinations of Cu(2+) inside and outside the dendrimers. At low Cu(2+) concentrations, CuN4 coordination involving the DAB core is preferential for G3- and G5-Pyr, while G4-Pyr shows a CuN3O coordination. CuN2O2 coordination into the external dendrimer layer was also contributing to G3- and G4-Pyr spectra. The structures of the proposed copper-dendrimer complexes were also shown. G4-Pyr displays unusual binding ability toward Cu(II) ions. Mainly the remarkably low toxicity shown by G4-Pyr and its peculiar binding ability leads to a potential use in biomedical fields.
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Affiliation(s)
- Maria Francesca Ottaviani
- Department of Earth, Life and Environment Sciences, University of Urbino , Località Crocicchia, 61029 Urbino, Italy
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20
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García-Gallego S, Cangiotti M, Fiorani L, Fattori A, Muñoz-Fernández MÁ, Gomez R, Ottaviani MF, de la Mata FJ. Anionic sulfonated and carboxylated PPI dendrimers with the EDA core: synthesis and characterization of selective metal complexing agents. Dalton Trans 2013; 42:5874-89. [PMID: 23462972 DOI: 10.1039/c3dt32870h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Herein we describe the synthesis and characterization of new sulfonated and carboxylated poly(propyleneimino) (PPI) dendrimers with the ethylenediamino (EDA) core, at generations 1, 2 and 3. By means of UV-Vis and EPR spectroscopy, using Cu(2+) as a probe, we concluded that these dendrimers show a specific pattern in the coordination of metal ions. In agreement with the UV-Vis studies, EPR spectra of carboxylated compounds are constituted by 3 different signals which appear and then disappear with increasing copper concentration, corresponding to the saturation of different copper complexation sites. At the lowest copper concentration up to a 1:1 molar ratio between Cu(II) and the dendrimer, the spectrum is characteristic of a CuN2O2 coordination at the core of the dendrimer. The spectrum appearing at higher Cu(II) concentrations indicates a peripheral location of the ions coordinating one nitrogen and 3 oxygen atoms in a square planar geometry in restricted mobility conditions. For the highest concentrations tested, copper ions are confined at the external dendrimer surface with CuO4 coordination. For sulfonate systems, the EPR results are in line with a weaker interaction of Cu(II) with the nitrogen sites and a stronger interaction with the oxygen (SO3(-)) groups with respect to the interactions measured by EPR for carboxylate systems.
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Affiliation(s)
- Sandra García-Gallego
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
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21
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Santeusanio S, Attanasi OA, Majer R, Cangiotti M, Fattori A, Ottaviani MF. Effect of hydrogenated cardanol on the structure of model membranes studied by EPR and NMR. Langmuir 2013; 29:11118-11126. [PMID: 23915214 DOI: 10.1021/la402008n] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Hydrogenated cardanol (HC) is known to act as an antiobesity, promising antioxidant, and eco-friendly brominating agent. In this respect, it is important to find the way to transport and protect HC into the body; a micellar structure works as the simplest membrane model and may be considered a suitable biocarrier for HC. Therefore, it is useful to analyze the impact of HC in the micellar structure and properties. This study reports a computer aided electron paramagnetic resonance (EPR) and (1)H NMR investigation of structural variations of cetyltrimetylammonium bromide (CTAB) micelles upon insertion of HC at different concentrations and pH variations. Surfactant spin probes inserted in the micelles allowed us to get information on the structure and dynamics of the micelles and the interactions between HC and CTAB. The formation of highly packed HC-CTAB mixed micelles were favored by the occurrence of both hydrophobic (chain-chain) and hydrophilic (between the polar and charged lipid heads) interactions. These interactions were enhanced by neutralization of the acidic HC heads. Different HC localizations into the micelles and micellar structures were identified by changing HC/CTAB relative concentrations and pH. The increase in HC concentration generated mixed micelles characterized by an increased surfactant packing. These results suggested a rod-like shape of the mixed micelles. The increase in pH promoted the insertion of deprotonated HC into less packed micelles, favored by the electrostatic head-head interactions between CTAB and deprotonated-HC surfactants.
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Affiliation(s)
- Stefania Santeusanio
- Department of Biomolecular Sciences, University of Urbino, Via Maggetti 24, 61029 Urbino, Italy.
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22
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Ottaviani MF, Cangiotti M, Fiorani L, Fattori A, Wasiak T, Appelhans D, Klajnert B. Kinetics of amyloid and prion fibril formation in the absence and presence of dense shell sugar-decorated dendrimers. Curr Med Chem 2013; 19:5907-21. [PMID: 22834819 DOI: 10.2174/092986712804143259] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 05/29/2012] [Accepted: 06/21/2012] [Indexed: 11/22/2022]
Abstract
The aggregation behavior of the amyloid peptide Aβ(1-28) and the prion peptide PrP(185-208) - both responsible for neurodegenerative disorders - was analyzed in the absence and in the presence of poly(propylene imine) (PPI) dendrimers at generation 5 (G5) with a dense shell of maltose and maltotriose units. Thioflavin T (ThT) fluorescence assay and circular dichroism (CD) experiments indicated that fibril formation is enhanced at low dendrimer concentration, while it is prevented at relatively high dendrimer concentrations. Computer aided EPR analysis by means of the selected spin probe 4-octyl-dimethylammonium,2,2,6,6-tetramethyl-piperidine-1-oxyl bromide (CAT8) further demonstrated this behavior, but also provided detailed information on the mechanism of fibril formation and on the different behavior of the differently decorated dendrimers. The CAT8 radicals were progressively trapped at the peptide interphase when peptide aggregates were formed, also monitoring pre-fibrillar structures. At later time, a phase separation of the CAT8 radicals monitors the formation of further supramolecular structures where the probes become squeezed among fibrillar aggregates. The addition of small amounts of dendrimers promotes the formation of peptide fibrils breaking them and providing a larger amount of ends that serve as sites of replications. Conversely, a high amount of dendrimers allows the peptides to well separate from each other such preventing their aggregation. EPR results also indicate that the perturbation played by PPI(G5)-Maltose are more effective onto PrP(185-208) than onto Aβ(1-28), while PPI(G5)-Maltotriose is less effective towards PrP(185-208) in both promoting aggregation and preventing it by changing the dendrimer concentration. These results provide useful information about the mechanism and interactions which regulate the ability of macromolecules like the dendrimers to favor, prevent or cure neurodegenerative diseases.
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Affiliation(s)
- M F Ottaviani
- Department of Earth, Life and Environment Sciences (DiSTeVA), University of Urbino, Localita Crocicchia, 61029, Urbino, Italy.
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23
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Fattori A, Santimaria MR, Alves RMA, Guariento ME, Neri AL. Influence of blood pressure profile on frailty phenotype in community-dwelling elders in Brazil - FIBRA study. Arch Gerontol Geriatr 2012; 56:343-9. [PMID: 22939428 DOI: 10.1016/j.archger.2012.08.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 08/06/2012] [Accepted: 08/08/2012] [Indexed: 11/29/2022]
Abstract
Frailty is a clinical condition associated with pathological aging and biological vulnerability. In the spectrum of events related to frailty, aging of the cardiocirculatory system and abnormalities in arterial blood pressure (BP) partly explain the changes in tissue perfusion and, potentially, the decrease in physiological reserves. This study investigated the relationship between BP levels, systemic arterial hypertension (SAH) and the frailty phenotype by analyzing frailty criteria in a cross-sectional model into the FIBRA network, a populational sample of community-dwelling elders in Southeastern Brazil. Study participants with ≥65 years were selected by probabilistic sampling of residents in the urban area of the municipality of Campinas (n=900). Considering frailty as a whole and the difference between genders, there was a greater proportion of frail or pre-frail individuals among women than men. Analysis of individual frailty criteria showed that weight loss and fatigue were more common among women (18.3% vs. 12.5%, p=0.034 and 22.5% vs. 11.9%, p<0.001, respectively). Comparison of individuals with or without SAH failed to reveal any differences related to frailty criteria. Nevertheless, averages of diastolic blood pressure (DBP) and mean arterial blood pressure values were lower among elderly individuals with reduced grip strength, physical activity and the frailty classification as a whole (OR 0.986, IC 0.975-0.997) (for every 1 mmHg reduction in MBP values, the likelihood of being frail increased 1.4%). Our findings corroborate the relationship between BP values and frailty in the elderly and contribute to an understanding of the pathophysiological mechanisms of the syndrome.
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Affiliation(s)
- A Fattori
- Faculty of Medical Sciences, Campinas State University, Unicamp, Brazil.
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24
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Ottaviani MF, Pregnolato M, Cangiotti M, Fiorani L, Fattori A, Danani A. Spin probe analysis of microtubules structure and formation. Arch Biochem Biophys 2012; 522:1-8. [PMID: 22516654 DOI: 10.1016/j.abb.2012.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 04/02/2012] [Accepted: 04/03/2012] [Indexed: 10/28/2022]
Abstract
Microtubules (MTs) control cell replication, material transport and motion in eukaryotic cells, but MT role in several pathologies is still unknown. These functions are related to the MT physico-chemical properties and MT formation mode starting from tubulin molecules. This study describes a new method, based on the computer aided analysis of the electron paramagnetic resonance (EPR) spectra of selected spin probes to obtain structural and dynamical information on tubulins and MTs and the kinetics of MTs formation promoted by guanosine-5'-triphosphate (GTP). It was found that tubulin and MTs avoid radical quenching caused by ethylene glycol tetraacetic acid (EGTA). MT formation showed different kinetics as a function of tubulin concentration. At 5 mg/mL of tubulin, MTs were formed in 8 min. These results are also useful for getting information on MT-drug interactions.
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Affiliation(s)
- Maria Francesca Ottaviani
- Department of Earth, Life and Environment Sciences (DiSTeVA)-Località Crocicchia, University of Urbino, 61029 Urbino, Italy.
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25
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Pizzo A, Borrielli I, Mastroeni MT, Fattori A, Dugo C, Dugo N, Dinatale A. [Low-dose flutamide in the treatment of hyperandrogenism in adolescents]. Minerva Pediatr 2008; 60:1357-1366. [PMID: 18971896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
AIM The aim of the study was to evaluate the results of the use of flutamide at low doses for the therapy of the iperandrogenism in adolescents. METHODS The study enrolled 35 young women with acne and irsutism; 31 had polycystic ovary syndrome (PCOS) and 4 periferic iperandrogenism. In other 8 young women, sexually active, the flutamide has been associated with the hormonal contraceptive. On the three young women with iperinsulinism it has been decided to associate the flutamide with the metformina. All the young women were checked each month for the liver functional. Before the beginning of the therapy the menstrual situation, the Body Mass Index (BMI), the Ferriman' s and Cremoncini's score, the ovary's ultrasound aspect, and the hormonal order were evaluated. Follow-up was made after three months and after six months after the beginning of the therapy with flutamide 62.5 mg/die. RESULTS Only in 4 cases the therapy has been suspended due to collateral effects, soon regressed after one week of the treatment interruption. The results have demonstrated a overwhelming improvement of the peripheral symptoms of iperandrogenism in all patients. CONCLUSION The authors hope that flutamide could enter in the list of medicines normally used to treat the beauty flaws of policistic acne and to restore a hormonal order associated to an effective contraception.
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Affiliation(s)
- A Pizzo
- Dipartimento di Scienze Ginecologiche e Ostetriche, Facoltà di Medicina e Chirurgia, Università degli Studi di Messina, Messina, Italia
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26
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Benites B, Fattori A, Hackel C, Lorand-Metze I, De Souza C, Schulz E, Costa F, Saad S. Low expression of APAF-1XL in acute myeloid leukemia may be associated with the failure of remission induction therapy. Braz J Med Biol Res 2008; 41:571-8. [DOI: 10.1590/s0100-879x2008000700004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Accepted: 06/09/2008] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - A. Fattori
- Universidade Estadual de Campinas, Brasil
| | - C. Hackel
- Universidade Estadual de Campinas, Brasil
| | | | | | - E. Schulz
- Universidade Estadual de Campinas, Brasil
| | - F.F. Costa
- Universidade Estadual de Campinas, Brasil
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27
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Moreira LS, de Andrade TG, Albuquerque DM, Cunha AF, Fattori A, Saad STO, Costa FF. IDENTIFICATION OF DIFFERENTIALLY EXPRESSED GENES INDUCED BY HYDROXYUREA IN RETICULOCYTES FROM SICKLE CELL ANAEMIA PATIENTS. Clin Exp Pharmacol Physiol 2008; 35:651-5. [DOI: 10.1111/j.1440-1681.2007.04861.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Fattori A, Kimura EM, Albuquerque DM, Oliveira DM, Costa FF, Sonati MF. Hb Indianapolis [beta112 (G14) Cys-->Arg] as the probable cause of moderate hemolytic anemia and renal damage in a Brazilian patient. Am J Hematol 2007; 82:672-5. [PMID: 17211844 DOI: 10.1002/ajh.20860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Hemoglobin (Hb) Indianapolis [beta112 (G14) Cys-->Arg] is a rare and slightly unstable beta-globin variant. All carriers described to date were clinically normal with only mild reticulocytosis. We report here a case of a Brazilian patient in whom hemolytic anemia and acute renal failure were probably caused by the presence of this variant.
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Affiliation(s)
- A Fattori
- Hematology and Hemotherapy Center, School of Medical Sciences, State University of Campinas-UNICAMP, Campinas, São Paulo, Brazil
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29
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Pizzo A, Fattori A, Dugo C, Mastroeni MT, Moscheo C, Dugo N. [Rokitansky-Kunster-Hauser-Mayer syndrome: a description of four cases]. Minerva Ginecol 2007; 59:95. [PMID: 17353879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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30
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de Andrade TG, Fattori A, Saad STO, Sonati MF, Costa FF. Molecular identification of Sicilian (deltabeta) degrees-thalassemia associated with beta-thalassemia and hemoglobin S in Brazil. Braz J Med Biol Res 2002; 35:873-6. [PMID: 12185378 DOI: 10.1590/s0100-879x2002000800003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We describe the clinical and molecular characteristics of two unrelated Brazilian families with an association of the Sicilian form of (deltabeta) degrees -thalassemia with hemoglobin S and beta-thalassemia. Direct sequencing of the beta-globin gene showed only the hemoglobin S mutation in patient 1 and the beta-thalassemia IVS1-110 in patient 2. The other allele was deleted in both patients and PCR of DNA samples of the breakpoint region of both patients showed a band of approximately 1,150 bp, expected to be observed in the DNA of carriers of Sicilian (deltabeta) degrees -thalassemia. The nucleotide sequence of this fragment confirmed the Sicilian deletion. There are few reports concerning the Hb S/(deltabeta) degrees -thalassemia association and patient 2 is the first reported case of Sicilian type of (deltabeta) degrees -thalassemia in association with beta-thalassemia documented at the molecular level.
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Affiliation(s)
- T G de Andrade
- Departamento de Clínica Médica, Hemocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
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31
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Bagni B, Orsolon P, Fattori A, Guerra UP. Renal SPECT with Tc-99m DMSA in children with upper urinary tract infections using a triple-headed gamma camera. Clin Nucl Med 1997; 22:838-43. [PMID: 9408646 DOI: 10.1097/00003072-199712000-00007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
UNLABELLED Renal cortical scintigraphy with Tc-99m DMSA provides an excellent imaging modality for the assessment of cortical damage secondary to upper urinary tract infection (UTI). METHODS The authors evaluated 48 children with UTI, 12 of whom had a history of vescico-ureteral reflux (from first of fourth degree), by planar scintigraphy and SPECT using a triple-headed gamma camera equipped with parallel-hole, high-resolution collimators. RESULTS SPECT images yielded positive findings in 36 kidneys, whereas planar scans yielded positive findings in 18 kidneys. The total number of lesions detected by SPECT was 51, whereas the number found with the planar technique was 23. CONCLUSION This study demonstrates the superiority of SPECT scanning in detecting kidney lesions in children with UTI.
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Affiliation(s)
- B Bagni
- Department of Medical and Radiological Science, University of Modena, Italy
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32
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Triolo O, Fattori A, Commisso S, Maimone A, Granese D. [Therapeutic abortion intrauterine fetal death in the second trimester. Treatment with a gemeprost-sulprostone combination]. Minerva Ginecol 1997; 49:383-91. [PMID: 9446072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
UNLABELLED This study reports the results obtained in the medical introduction of abortion during the second trimester of pregnancy in 52 patients following intrauterine fetal death or the diagnosis of fetal malformations. METHODS The protocol consisted of the alternate use of intravaginal suppositories of gemeprost and intramuscular injections of sulprostone. The results were analysed using statistical methods and evaluated in relation to the different parameters present (intrauterine fetal death or therapeutic abortion, maternal age, gestation period and parity). RESULTS It was seen that the time required to induce abortive labour was significantly shorter in patients with IFD compared to patients with live fetus. The comparison between patients with a gestation period < or > 18 weeks revealed shorter induction times in the former group without reaching statistical significance. CONCLUSIONS Maternal age (under and over 30) and parity (P = 0 and P > or = 1) did not influence the results obtained.
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Affiliation(s)
- O Triolo
- Istituto di Ginecologia e Ostetricia, Università degli Studi, Messina
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33
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Coimbra TM, Carvalho J, Fattori A, Da Silva CG, Lachat JJ. Transforming growth factor-beta production during the development of renal fibrosis in rats with subtotal renal ablation. Int J Exp Pathol 1996; 77:167-73. [PMID: 8943735 PMCID: PMC2691632 DOI: 10.1046/j.1365-2613.1996.d01-217.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [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] [Indexed: 02/03/2023] Open
Abstract
The histologic changes observed in the remnant kidney model include progressive mesangial expansion with collapse of capillary lumina, interstitial fibrosis and mononuclear cellular infiltration. Transforming growth factor-beta (TGF-beta 1) is an important regulator of extracellular matrix formation. The purpose of this study was to investigate the production and distribution of TGF-beta 1 in the kidney during the development of glomerulosclerosis and renal fibrosis in rats with subtotal renal ablation. Eighty-two female Wistar rats weighing 180-220 g were divided into two groups: 49 rats were subjected to 5/6 renal ablation and 33 to sham operation. Urinary albumin excretion, blood pressure and glomerular filtration rate (GFR) were evaluated after the surgical procedure. We also performed histology and immunohistochemistry and determined mRNA for TGF-beta 1 in the kidneys of these rats 8, 15, 30 and 90 days after operation. The results showed progressively higher immunohistochemical TGF-beta 1 staining in rats with subtotal renal ablation. Cortical renal content of TGF-beta 1 mRNA was also higher in these animals and peaked at day 15. The existence of a temporal association between glomerulosclerosis, interstitial fibrosis and intense mononuclear cellular infiltration on the one hand and higher immunohistochemical TGF-beta 1 staining in the renal cortex on the other show that this polypeptide may contribute to the development of renal fibrosis in this model.
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Affiliation(s)
- T M Coimbra
- Department of Physiology, Universidade de São Paulo, Brazil
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34
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Giacchi R, Fattori A, de Poda D, Brici P. [A conservative Taylor's method in the treatment of peptic perforation]. G Chir 1990; 11:640-2. [PMID: 2091725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Forty-eight patients affected by perforated ulcer and treated with Taylor's method are examined. Non-operative therapy was successful in forty-two patients; six patients subsequently underwent surgery. All forty-eight patients recovered. The Taylor method is effective in selected cases and represents a therapeutic option which may integrate surgery.
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Affiliation(s)
- R Giacchi
- Divisiona Chirurgia Generale, Ospedale Civile S. Salvatore di Pesaro
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35
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Oliva A, Le Donne M, Fattori A, Dugo C, Scarselli G. Pregnancy following administration of GNRH by means of portable pump: hormonal evaluation before and during therapy. Acta Eur Fertil 1989; 20:71-5. [PMID: 2678874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In a group of three patients affected by severe hypothalamic amenorrhea, gonadotropins behaviour before and during pulsatile GNRH therapy, was investigated with more accuracy for seven cycles. The treatment was administered intravenously with a dosage of 5 ug/90 min. The number of cycles for pregnancy was of 1.75 with a pregnancy rate of 57.1%. The gonadotropins response to an acute test with 100 ug of GNRH performed in the three patients at the 7th day of their first treatment cycle was compared with response to the same test done before the beginning of the pulsatile therapy. Some considerations about the results were suggested.
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Affiliation(s)
- A Oliva
- Istituto di Ginecologia, Università di Messina
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36
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Giacchi R, Fattori A, Lungarotti F. [Raynaud's disease and syndrome. Presentation of clinical experience]. G Chir 1989; 10:25-8. [PMID: 2518524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Authors report their experience concerning 256 cases of Raynaud's Disease and Syndrome observed from 1968 to 1987; 23 patients underwent surgery for the treatment of dystrophic or gangrenous lesions of the extremities (12 cervico-thoracic and 8 lumbar sympathectomies, 1 popliteal aneurysmectomy, 2 scalenotomies): a significant improvement of the clinical picture was observed in 91.30% of the patients who underwent the operation. The pharmacologic treatment obtained satisfactory results in 51.26% of all the patients. The Authors propose a three stage classification of raynaudian symptoms: I stage: sporadic vasoconstrictive crises; II stage: recurrent vasoconstrictive crises not invalidating working activity and "restitutio ad integrum" between attacks; III stage: recurrent and frequent crises invalidating working activity with asphyxia and/or ulcer-gangrene of the extremities. Both pharmacological and surgical treatment obtained the improvement of the clinical condition to an inferior stage in a high rate of patients. In three patients only (two of whom underwent scalenotomy and one popliteal aneurysmectomy) the complete and definitive cessation of raynaudian crises was observed.
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Fattori A, De Poda D, Ena S, Rogheto M, Lungarotti F. [Traumatic ruptures of the diaphragm. Personal experience]. G Chir 1988; 9:286-91. [PMID: 3153994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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De Poda D, Beluffi L, Fattori A, Rogheto M, Sparaventi G. [Primary gastric lymphoma. Diagnostic and therapeutic observations on 12 cases]. MINERVA CHIR 1988; 43:265-9. [PMID: 3368093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Fattori A, Imparato M, Beluffi L, Sebastiani M. [Apropos of a case of splenic artery aneurysm]. Minerva Med 1982; 73:1371-4. [PMID: 7078813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Lungarotti F, Imparato M, Rossi M, Fattori A. [Surgical treatment of parotid neoplasms]. Chir Ital 1980; 32:309-17. [PMID: 6263507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Venuti FS, Granese D, Fattori A. [Influence of some anesthesiologic methods on blood loss in procedures for voluntary termination of pregnancy]. Rass Med Sper 1980; 27:191-8. [PMID: 12279128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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Imparato M, Lungarotti F, Tagarelli A, Rossi M, Fattori A. [Considerations on several cases of recurrent or relapsing acute pancreatitis treated by total pancreatectomy in the last five years. Overall possibilities of surgical treatment according to personal experience (author's transl)]. Chir Ital 1978; 30:744-52. [PMID: 753534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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