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Buccini L, Proietti A, La Penna G, Mancini C, Mura F, Tacconi S, Dini L, Rossi M, Passeri D. Toward the nanoscale chemical and physical probing of milk-derived extracellular vesicles using Raman and tip-enhanced Raman spectroscopy. Nanoscale 2024; 16:8132-8142. [PMID: 38568015 DOI: 10.1039/d4nr00845f] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Tip-enhanced Raman spectroscopy (TERS) is an advanced technique to perform local chemical analysis of the surface of a sample through the improvement of the sensitivity and the spatial resolution of Raman spectroscopy by plasmonic enhancement of the electromagnetic signal in correspondence with the nanometer-sized tip of an atomic force microscope (AFM). In this work, TERS is demonstrated to represent an innovative and powerful approach for studying extracellular vesicles, in particular bovine milk-derived extracellular vesicles (mEVs), which are nanostructures with considerable potential in drug delivery and therapeutic applications. Raman spectroscopy has been used to analyze mEVs at the micrometric and sub-micrometric scales to obtain a detailed Raman spectrum in order to identify the 'signature' of mEVs in terms of their characteristic molecular vibrations and, therefore, their chemical compositions. With the ability to improve lateral resolution, TERS has been used to study individual mEVs, demonstrating the possibility of investigating a single mEV selected on the surface of the sample and, moreover, analyzing specific locations on the selected mEV with nanometer lateral resolution. TERS potentially allows one to reveal local differences in the composition of mEVs providing new insights into their structure. Also, thanks to the intrinsic properties of TERS to acquire the signal from only the first few nanometers of the surface, chemical investigation of the lipid membrane in correspondence with the various locations of the selected mEV could be performed by analyzing the peaks of the Raman shift in the relevant range of the spectrum (2800-3000 cm-1). Despite being limited to mEVs, this work demonstrates the potential of TERS in the analysis of extracellular vesicles.
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Affiliation(s)
- Luca Buccini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
| | - Anacleto Proietti
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
| | - Giancarlo La Penna
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
| | - Chiara Mancini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
| | - Francesco Mura
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
- Research Center for Nanotechnology Applied to Engineering of Sapienza University of Rome (CNIS), Piazzale A. Moro 5, 00185 Rome, Italy
| | - Stefano Tacconi
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Luciana Dini
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
- Research Center for Nanotechnology Applied to Engineering of Sapienza University of Rome (CNIS), Piazzale A. Moro 5, 00185 Rome, Italy
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
- Research Center for Nanotechnology Applied to Engineering of Sapienza University of Rome (CNIS), Piazzale A. Moro 5, 00185 Rome, Italy
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Pinna F, Fois N, Mura F, Ruiu A, Ceccherelli G. Predation risk of the sea urchin Paracentrotus lividus juveniles in an overfished area reveal system stability mechanisms and restocking challenges. PLoS One 2024; 19:e0301143. [PMID: 38635595 PMCID: PMC11025834 DOI: 10.1371/journal.pone.0301143] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/11/2024] [Indexed: 04/20/2024] Open
Abstract
Where sea urchin harvest has been so intense that populations have drastically regressed, concerns have arisen about the effectiveness of harvesting management. According to the theory of phase transition in shallow rocky reefs between vegetated and barren habitats, sea urchin recruitment, a key population structuring process, seems hampered by some stabilizing feedback despite an end to local human harvest of sea urchins. To shed a light on predation effects on sea urchin recruits, a 27-day field experiment was conducted using mega-predator exclusion cages (40x40x40 cm, 1 cm in mesh size) in barren and turf substrates. To facilitate this, 672 recruits (1.1 ± 0.02 cm in size) reared under control conditions were positioned in groups of 42 in each experimental unit (n = 4). Exclusion of mega-predators had a significant effect regardless the substrate, since a higher number of recruits was found under cages both in turf and barren. However, the results showed that in uncaged treatments the size of recruits that survived was larger in turf than in barren, as in the former substrate predation had reduced the abundance of the smallest recruits, highlighting that mega-predator presence affects differently the size of the recruits that had survived depending on the substrate. Overall, these results provide valuable information to address restocking actions of sea urchin populations in overharvested areas, where algal turfs are widespread, and assist studies on habitat stability mechanisms.
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Affiliation(s)
- Federico Pinna
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Sassari, Italy
| | - Nicola Fois
- AGRIS Sardegna–Research Service for Fishery Products, Olmedo (SS), Italia
| | - Francesco Mura
- AGRIS Sardegna–Research Service for Fishery Products, Olmedo (SS), Italia
| | - Alberto Ruiu
- Capo Caccia–Isola Piana Marine Protected Area, Alghero, (SS), Italia
| | - Giulia Ceccherelli
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Sassari, Italy
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Frezza C, Nicolosi RM, Brasili E, Mura F, De Vita D. Occurrence and Biological Activities of Seco-Iridoids from Jasminum L. Chem Biodivers 2024; 21:e202400254. [PMID: 38426938 DOI: 10.1002/cbdv.202400254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/01/2024] [Accepted: 03/01/2024] [Indexed: 03/02/2024]
Abstract
In this paper, the first complete review on the seco-iridoids from the genus Jasminum L. was presented. In particular, their occurrence in the genus was detailed together with their biological activities. The literature survey has clearly pointed out that only a few Jasminum species have been studied for their seco-iridoid content evidencing oleoside derivatives as main compounds. In addition, the biological studies performed on them are very scarce focusing mainly on antioxidant and anti-inflammatory assays with modest effectiveness. All these results greatly underline the need for further in-depth analyses on these compounds under both the aspects.
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Affiliation(s)
- Claudio Frezza
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Roberta Maria Nicolosi
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Elisa Brasili
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Francesco Mura
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Daniela De Vita
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Rome, Italy
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4
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Cimini A, Borgioni A, Passarini E, Mancini C, Proietti A, Buccini L, Stornelli E, Schifano E, Dinarelli S, Mura F, Sergi C, Bavasso I, Cortese B, Passeri D, Imperi E, Rinaldi T, Picano A, Rossi M. Upscaling of Electrospinning Technology and the Application of Functionalized PVDF-HFP@TiO 2 Electrospun Nanofibers for the Rapid Photocatalytic Deactivation of Bacteria on Advanced Face Masks. Polymers (Basel) 2023; 15:4586. [PMID: 38231986 PMCID: PMC10708761 DOI: 10.3390/polym15234586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/25/2023] [Accepted: 11/28/2023] [Indexed: 01/19/2024] Open
Abstract
In recent years, Electrospinning (ES) has been revealed to be a straightforward and innovative approach to manufacture functionalized nanofiber-based membranes with high filtering performance against fine Particulate Matter (PM) and proper bioactive properties. These qualities are useful for tackling current issues from bacterial contamination on Personal Protective Equipment (PPE) surfaces to the reusability of both disposable single-use face masks and respirator filters. Despite the fact that the conventional ES process can be upscaled to promote a high-rate nanofiber production, the number of research works on the design of hybrid materials embedded in electrospun membranes for face mask application is still low and has mainly been carried out at the laboratory scale. In this work, a multi-needle ES was employed in a continuous processing for the manufacturing of both pristine Poly (Vinylidene Fluoride-co-Hexafluoropropylene) (PVDF-HFP) nanofibers and functionalized membrane ones embedded with TiO2 Nanoparticles (NPs) (PVDF-HFP@TiO2). The nanofibers were collected on Polyethylene Terephthalate (PET) nonwoven spunbond fabric and characterized by using Scanning Electron Microscopy and Energy Dispersive X-ray (SEM-EDX), Raman spectroscopy, and Atomic Force Microscopy (AFM) analysis. The photocatalytic study performed on the electrospun membranes proved that the PVDF-HFP@TiO2 nanofibers provide a significant antibacterial activity for both Staphylococcus aureus (~94%) and Pseudomonas aeruginosa (~85%), after only 5 min of exposure to a UV-A light source. In addition, the PVDF-HFP@TiO2 nanofibers exhibit high filtration efficiency against submicron particles (~99%) and a low pressure drop (~3 mbar), in accordance with the standard required for Filtering Face Piece masks (FFPs). Therefore, these results aim to provide a real perspective on producing electrospun polymer-based nanotextiles with self-sterilizing properties for the implementation of advanced face masks on a large scale.
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Affiliation(s)
- Adriano Cimini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Industrial Research Laboratory, LABOR s.r.l., Via Giacomo Peroni 386, 00131 Rome, Italy
| | - Alessia Borgioni
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Elena Passarini
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Chiara Mancini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Anacleto Proietti
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Luca Buccini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Eleonora Stornelli
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Emily Schifano
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Simone Dinarelli
- Institute for the Structure of Matter (ISM), National Research Council (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy;
| | - Francesco Mura
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Claudia Sergi
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome & UdR INSTM, Via Eudossiana 18, 00184 Rome, Italy
| | - Irene Bavasso
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome & UdR INSTM, Via Eudossiana 18, 00184 Rome, Italy
| | - Barbara Cortese
- National Research Council (CNR), Institute of Nanotechnology (CNR Nanotec), c/o Edificio Fermi, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Enrico Imperi
- Industrial Research Laboratory, LABOR s.r.l., Via Giacomo Peroni 386, 00131 Rome, Italy
| | - Teresa Rinaldi
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Alfredo Picano
- National Research Council of Italy, Institute for Microelectronics and Microsystems (CNR-IMM), Via Piero Gobetti 101, 40129 Bologna, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
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Mura F, Cognigni F, Ferroni M, Morandi V, Rossi M. Advances in Focused Ion Beam Tomography for Three-Dimensional Characterization in Materials Science. Materials (Basel) 2023; 16:5808. [PMID: 37687502 PMCID: PMC10488958 DOI: 10.3390/ma16175808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 09/10/2023]
Abstract
Over the years, FIB-SEM tomography has become an extremely important technique for the three-dimensional reconstruction of microscopic structures with nanometric resolution. This paper describes in detail the steps required to perform this analysis, from the experimental setup to the data analysis and final reconstruction. To demonstrate the versatility of the technique, a comprehensive list of applications is also summarized, ranging from batteries to shale rocks and even some types of soft materials. Moreover, the continuous technological development, such as the introduction of the latest models of plasma and cryo-FIB, can open the way towards the analysis with this technique of a large class of soft materials, while the introduction of new machine learning and deep learning systems will not only improve the resolution and the quality of the final data, but also expand the degree of automation and efficiency in the dataset handling. These future developments, combined with a technique that is already reliable and widely used in various fields of research, are certain to become a routine tool in electron microscopy and material characterization.
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Affiliation(s)
- Francesco Mura
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
| | - Flavio Cognigni
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
| | - Matteo Ferroni
- National Research Council of Italy, Institute for Microelectronics and Microsystems, Section of Bologna, Via Piero Gobetti 101, 40129 Bologna, Italy; (M.F.); (V.M.)
- Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM), University of Brescia, Via Branze 43, 25123 Brescia, Italy
| | - Vittorio Morandi
- National Research Council of Italy, Institute for Microelectronics and Microsystems, Section of Bologna, Via Piero Gobetti 101, 40129 Bologna, Italy; (M.F.); (V.M.)
| | - Marco Rossi
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
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Bernabale M, Cognigni F, Mancini C, Proietti A, Mura F, Montanari D, Nigro L, Rossi M, De Vito C. 3D fractures analysis and conservation assessment of wrought iron javelin through advanced non-invasive techniques. Sci Rep 2023; 13:10142. [PMID: 37349367 DOI: 10.1038/s41598-023-37179-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/17/2023] [Indexed: 06/24/2023] Open
Abstract
3D imaging is a powerful tool of high resolution and non-destructive imaging technology for the study of ancient weapons and military technology, which reveals the original microstructures and corrosion patterns that threaten these artefacts. Here we report quantitative analysis of the 3D distribution and the orientation of fractures, and uncorroded metal particles within a wrought iron javelin unearthed at the Phoenician-Punic site of Motya, Italy. The study aimed to gain a better understanding of the relationship between corrosion and local stresses within the artifact and to evaluate its manufacturing technology, as well as the effects of post-treatment with Paraloid B72 on concretion and mineralized layers. The cracks were quantified in terms of content, size, and orientation. The condition of artefact storage was evaluated by a multi-analytical approach, including X-ray microscopy, field emission electron microscopy and micro-Raman spectroscopy. The results indicated that a specific technique was used to create a sturdy, lightweight javelin with a central shaft for piercing or thrusting. The fractures appear elongated in the direction of the longitudinal axis of the blade, showing the forging direction of the original metallic block. The study concluded that the artifact had not yet been stabilized due to the presence of lepidocrocite.
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Affiliation(s)
- Martina Bernabale
- Department of Earth Sciences, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Flavio Cognigni
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Chiara Mancini
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Anacleto Proietti
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Francesco Mura
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Daria Montanari
- Department Italian Institute of Oriental Studies - ISO, Sapienza University of Rome, Circonvallazione Tiburtina 4, 00185, Rome, Italy
| | - Lorenzo Nigro
- Department Italian Institute of Oriental Studies - ISO, Sapienza University of Rome, Circonvallazione Tiburtina 4, 00185, Rome, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Caterina De Vito
- Department of Earth Sciences, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy.
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Di Girolamo D, Aktas E, Ponti C, Pascual J, Li G, Li M, Nasti G, Alharthi F, Mura F, Abate A. Enabling water-free PEDOT as hole selective layer in lead-free tin perovskite solar cells. Mater Adv 2022; 3:9083-9089. [PMID: 36545323 PMCID: PMC9743132 DOI: 10.1039/d2ma00834c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 10/11/2022] [Indexed: 06/17/2023]
Abstract
Metal halide perovskites are set to revolutionise photovoltaic energy harvesting owing to an unmatched combination of high efficiency and low fabrication costs. However, to improve the sustainability of this technology, replacing lead with less toxic tin is highly desired. Tin halide perovskites are approaching 15% in power conversion efficiency (PCE), mainly employing PEDOT:PSS as a hole-selective layer. Unfortunately, PEDOT:PSS is processed from an aqueous solution, which is hardly compatible with the strict anoxic requirements for processing tin halide perovskites due to tin's instability to oxidation. Here, we present a water-free PEDOT formulation for developing tin-based lead-free perovskite solar cells. We show that the main difference between the PCE of devices made from aqueous and water-free PEDOT is due to the marked hydrophobicity of the latter, which complicates the perovskite deposition. By modifying the surface of water-free PEDOT with a thin Al2O3 interlayer, we could achieve good perovskite morphology that enabled perovskite solar cells with a PCE of 7.5%.
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Affiliation(s)
- Diego Di Girolamo
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II Piazzale Tecchio 80 Fuorigrotta 80125 Italy
| | - Ece Aktas
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II Piazzale Tecchio 80 Fuorigrotta 80125 Italy
| | - Corinna Ponti
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II Piazzale Tecchio 80 Fuorigrotta 80125 Italy
| | - Jorge Pascual
- Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Guixiang Li
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Berlin 14109 Germany
| | - Meng Li
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Berlin 14109 Germany
| | - Giuseppe Nasti
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II Piazzale Tecchio 80 Fuorigrotta 80125 Italy
| | - Fahad Alharthi
- Chemistry Department, Science College, King Saud University P O Box 2455 Riyadh 11451 Saudi Arabia
| | - Francesco Mura
- Centro delle Nanotecnologie applicate all'Ingegneria della Sapienza - CNIS, University of Rome La Sapienza Piazzale Aldo Moro 5 Rome 00185 Italy
| | - Antonio Abate
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II Piazzale Tecchio 80 Fuorigrotta 80125 Italy
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Berlin 14109 Germany
- Chemistry Department, Science College, King Saud University P O Box 2455 Riyadh 11451 Saudi Arabia
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Sbarigia C, Tacconi S, Mura F, Rossi M, Dinarelli S, Dini L. High-resolution atomic force microscopy as a tool for topographical mapping of surface budding. Front Cell Dev Biol 2022; 10:975919. [PMID: 36313576 PMCID: PMC9597496 DOI: 10.3389/fcell.2022.975919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 09/26/2022] [Indexed: 11/21/2022] Open
Abstract
Extracellular vesicles (EVs) are membranous nanoparticles secreted by almost all cell types. Reflecting the physiopathological state of the parental cell, EVs circulate in all body fluids, reaching distant cell targets and delivering different bioactive cargoes. As biological carriers, EVs influence their microenvironment altering cellular responses, being considered promising biomarkers for both physiological and pathological conditions. EVs are heterogeneous in terms of size and composition, depending on cell type and exposure to stimuli, and different methods have been developed to characterize their morphological, biophysical, and biochemical features. Among them, electron microscopy (EM) is the main technique used, however, the lack of standardized protocols makes it difficult to characterize EVs with a good reproducibility, thus using multiple approaches may represent a way to obtain more precise information. Furthermore, the relationship between architecture and function, not only in a molecular, but also in a cellular level, is gaining growing emphasis, characterizing morphometric parameters may represent a distinct, but effective approach to study the physiopathological state of the cell. Atomic force microscopy (AFM), may represent a promising method to study in detail EVs dynamics throughout the cell surface and its variations related to the physiological state, overcoming the limits of EM, and providing more reliable information. In this study, human neuroblastoma SH-SY5Y cell line, a cellular model to investigate neurodegeneration and oxidative stress, has been used to perform a comparative morphological and quantitative analysis of membrane budding and isolated large vesicles-enriched (microvesicles-like vesicles; MVs) fraction from control or oxidative stressed cells. Our main goal was to build up a methodology to characterize EVs morphology and spatial distribution over the cell surface in different physiological conditions, and to evaluate the efficacy of AFM against conventional EM. Interestingly, both microscopy techniques were effective for this analysis, but AFM allowed to reveal a differential profiling of plasma membrane budding between the physiological and the stress condition, indicating a potential relationship between mechanical characteristics and functional role. The results obtained may provide interesting perspectives for the use of AFM to study EVs, validating a morphometric approach to understand the pathophysiological state of the cell related to EVs trafficking.
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Affiliation(s)
- C. Sbarigia
- Department of Biology and Biotechnology “C. Darwin”, University of Rome Sapienza, Rome, Italy
| | - S. Tacconi
- Department of Biology and Biotechnology “C. Darwin”, University of Rome Sapienza, Rome, Italy
| | - F. Mura
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), University of Rome Sapienza, Rome, Italy
| | - M. Rossi
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), University of Rome Sapienza, Rome, Italy
- Department of Basic and Applied Sciences for Engineering, University of Rome Sapienza, Rome, Italy
| | - S. Dinarelli
- Institute for the Structure of Matter (ISM), National Research Council (CNR) Rome, Rome, Italy
| | - L. Dini
- Department of Biology and Biotechnology “C. Darwin”, University of Rome Sapienza, Rome, Italy
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), University of Rome Sapienza, Rome, Italy
- CNR Nanotec, Lecce, Italy
- *Correspondence: L. Dini,
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Cirigliano A, Mura F, Cecchini A, Tomassetti MC, Maras DF, Di Paola M, Meriggi N, Cavalieri D, Negri R, Quagliariello A, Hallsworth JE, Rinaldi T. Active microbial ecosystem in
Iron‐Age
tombs of the Etruscan civilization. Environ Microbiol 2020; 23:3957-3969. [DOI: 10.1111/1462-2920.15327] [Citation(s) in RCA: 4] [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] [Received: 09/17/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Angela Cirigliano
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
| | - Francesco Mura
- CNIS – Center for Nanotechnology Applied to Industry of La Sapienza Sapienza University of Rome Rome Italy
| | - Adele Cecchini
- Associazione No Profit ‘Amici Delle Tombe Dipinte di Tarquinia’ Tarquinia Italy
| | | | - Daniele Federico Maras
- Soprintendenza Archeologia Belle Arti e Paesaggio per l'Area Metropolitana di Roma, la Provincia di Viterbo e l'Etruria Meridionale Ministero dei Beni e delle Attività Culturali e del Turismo Rome Italy
| | | | | | | | - Rodolfo Negri
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
| | - Andrea Quagliariello
- Department of Comparative Biomedicine and Food Science University of Padova Padova Italy
| | - John E. Hallsworth
- Institute for Global Food Security School of Biological Sciences, Queen's University Belfast Belfast UK
| | - Teresa Rinaldi
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
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Lacave JM, Bilbao E, Gilliland D, Mura F, Dini L, Cajaraville MP, Orbea A. Bioaccumulation, cellular and molecular effects in adult zebrafish after exposure to cadmium sulphide nanoparticles and to ionic cadmium. Chemosphere 2020; 238:124588. [PMID: 31545210 DOI: 10.1016/j.chemosphere.2019.124588] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 06/07/2019] [Revised: 08/06/2019] [Accepted: 08/13/2019] [Indexed: 06/10/2023]
Abstract
Few works have addressed the effects provoked by the exposure to cadmium containing nanoparticles (NPs) on adult zebrafish (Danio rerio). We studied the effects of CdS NPs (5 nm) or ionic cadmium (10 μg Cd/L) after 3 and 21 d of exposure and at 6 months post-exposure (mpe). Acute toxicity was recorded after exposure to both forms of cadmium. Significant cadmium accumulation was measured in the whole fish after both treatments and autometallography showed a higher accumulation of metal in the intestine than that in the liver. Histopathological alterations, such as inflammation in gills and vacuolization in the liver, were detected after the exposure to both cadmium forms and, in a lower extent, at 6 mpe. X-ray analysis proved the presence of CdS NPs in these organs. The hepatic transcriptome analysis revealed that gene ontology terms such as "immune response" or "actin binding" were over-represented after 21 d of exposure to ionic cadmium respect to CdS NPs treatment. Exposure to CdS NPs caused a significant effect on pathways involved in the immune response and oxidative stress, while the exposure to ionic cadmium affected significantly pathways involved in DNA damage and repair and in the energetic metabolism. Oxidative damage to liver proteins was detected after the exposure to ionic cadmium, while a stronger destabilization of the hepatocyte lysosomal membrane was recorded under exposure to CdS NPs. In summary, although ionic cadmium provoked stronger effects than CdS NPs, both cadmium forms exerted an array of lethal and sublethal effects to zebrafish.
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Affiliation(s)
- José María Lacave
- CBET Research Group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940, Leioa, Basque Country, Spain
| | - Eider Bilbao
- CBET Research Group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940, Leioa, Basque Country, Spain
| | - Douglas Gilliland
- European Commission, JRC Directorate F, Health, Consumers and Reference Materials, Via E. Fermi, 2749, I-21027, Ispra, VA, Italy
| | - Francesco Mura
- Dept. of Basic and Applied Sciences for Engineering and Center for Nanotechnologies Applied to Engineering, Sapienza University of Rome Via A. Scarpa 16, Rome, 00161, Italy
| | - Luciana Dini
- Dept. of Biological and Environmental Science and Technology (Di.S.Te.B.A), University of Salento & CNR, Nanotec, 73100, Lecce, Italy
| | - Miren P Cajaraville
- CBET Research Group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940, Leioa, Basque Country, Spain
| | - Amaia Orbea
- CBET Research Group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940, Leioa, Basque Country, Spain.
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11
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Bonfiglio G, Neroni B, Radocchia G, Pompilio A, Mura F, Trancassini M, Di Bonaventura G, Pantanella F, Schippa S. Growth Control of Adherent-Invasive Escherichia coli (AIEC) by the Predator Bacteria Bdellovibrio bacteriovorus: A New Therapeutic Approach for Crohn's Disease Patients. Microorganisms 2019; 8:microorganisms8010017. [PMID: 31861852 PMCID: PMC7023281 DOI: 10.3390/microorganisms8010017] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/05/2019] [Accepted: 12/17/2019] [Indexed: 01/10/2023] Open
Abstract
In Crohn’s disease (CD) patients, intestinal dysbiosis with an overgrowth of Proteobacteria, mainly Escherichia coli, has been reported. A new pathotype of E. coli, the adherent-invasive Escherichia coli strain (AIEC), has been isolated from the mucosae of CD patients. AIEC strains play an important role in CD pathogenesis, increasing intestinal mucosa damage and inflammation. Several studies have been undertaken to find possible strategies/treatments aimed at AIEC strain reduction/elimination from CD patients’ intestinal mucosae. To date, a truly effective strategy against AIEC overgrowth is not yet available, and as such, further investigations are warranted. Bdellovibrio bacteriovorus is a predator bacterium which lives by invading Gram-negative bacteria, and is usually present both in natural and human ecosystems. The aim of this study was to evaluate a novel possible strategy to treat CD patients’ mucosae when colonized by AIEC strains, based on the utilization of the Gram-negative predatory bacteria, B. bacteriovorus. The overall results indicate that B. bacteriovorus is able to interfere with important steps in the dynamics of pathogenicity of AIEC strains by its predatory activity. We indicate, for the first time, the possibility of counteracting AIEC strain overgrowth by exploiting what naturally occurs in microbial ecosystems (i.e., predation).
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Affiliation(s)
- Giulia Bonfiglio
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
| | - Bruna Neroni
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
| | - Giulia Radocchia
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
| | - Arianna Pompilio
- Department of Medical, Oral and Biotechnological Sciences, and Center for Advanced Studies and Technology (CAST), University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Francesco Mura
- Electrical and Energy Engineering, Sapienza Nanoscience & Nanotechnology Laboratories (SNN-Lab), ‘Sapienza’ University of Rome, 00185 Roma, Italy;
| | - Maria Trancassini
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
| | - Giovanni Di Bonaventura
- Department of Medical, Oral and Biotechnological Sciences, and Center for Advanced Studies and Technology (CAST), University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Fabrizio Pantanella
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
| | - Serena Schippa
- Department of Public Health and Infectious Diseases, Microbiology section, Sapienza University of Rome, 00185 Roma, Italy; (G.B.); (B.N.); (G.R.); (M.T.); (F.P.)
- Correspondence:
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12
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Paolini A, Battafarano G, D'Oria V, Mura F, Sennato S, Mussi V, Risoluti R, Materazzi S, Del Fattore A, Masotti A. A 3D-Printed Multi-Chamber Device Allows Culturing Cells On Buckypapers Coated With PAMAM Dendrimer And Obtain Innovative Materials For Biomedical Applications. Int J Nanomedicine 2019; 14:9295-9306. [PMID: 31819431 PMCID: PMC6890209 DOI: 10.2147/ijn.s224819] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/08/2019] [Indexed: 01/15/2023] Open
Abstract
Background The advent of 3D printing technology allowed the realization of custom devices that can be used not only in the everyday life but also in the nanotechnology and biomedical fields. In nanotechnology, the use of bi-dimensional nanostructures based on carbon nanotubes, generally referred as buckypapers, have received considerable attention for their versatility and potential application in many biomedical fields. Unfortunately, buckypapers are extremely hydrophobic and cannot be used in aqueous media to culture cells. Methods A polymeric device able to accommodate buckypapers and facilitate cell growth was fabricated by using 3D printing technology. We imparted hydrophilicity to buckypapers by coating them with polyamidoamine (PAMAM) dendrimers. Results We found that by using novel techniques such as polymer coating the buckypaper hydrophilicity increased, whereas the use of 3D printing technology allowed us to obtain custom devices that have been used to culture cells on buckypapers for many days. We characterized in details the morphology of these structures and studied for the first time the kinetic of cell proliferation. We found that these scaffolds, if properly functionalized, are suitable materials to grow cells for long time and potentially employable in the biomedical field. Conclusion Although these materials are cytotoxic under certain circumstances, we have found a suitable coating and specific experimental conditions that encourage using buckypapers as novel scaffolds for cell growth and for potential applications in tissue repair and regeneration.
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Affiliation(s)
- Alessandro Paolini
- Bambino Gesù Children's Hospital, IRCCS, Research Laboratories, Rome 00146, Italy
| | - Giulia Battafarano
- Bambino Gesù Children's Hospital, IRCCS, Research Laboratories, Rome 00146, Italy
| | - Valentina D'Oria
- Bambino Gesù Children's Hospital, IRCCS, Research Laboratories, Rome 00146, Italy
| | - Francesco Mura
- Center for Nanotechnology for Engineering (CNIS), Sapienza University of Rome, Rome 00185, Italy
| | - Simona Sennato
- CNR-ISC UOS Sapienza and Physics Department, Sapienza University of Rome, Rome 00185, Italy
| | - Valentina Mussi
- National Research Council, Institute for Microelectronics and Microsystems IMM-CNR, Roma 00133, Italy
| | - Roberta Risoluti
- Department of Chemistry, Sapienza University of Rome, Rome 00185, Italy
| | - Stefano Materazzi
- Department of Chemistry, Sapienza University of Rome, Rome 00185, Italy
| | - Andrea Del Fattore
- Bambino Gesù Children's Hospital, IRCCS, Research Laboratories, Rome 00146, Italy
| | - Andrea Masotti
- Bambino Gesù Children's Hospital, IRCCS, Research Laboratories, Rome 00146, Italy
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Reggente M, Kriegel S, He W, Masson P, Pourroy G, Mura F, Faerber J, Passeri D, Rossi M, Palkowski H, Carradò A. How alkali-activated Ti surfaces affect the growth of tethered PMMA chains: a close-up study on the PMMA thickness and surface morphology. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-0223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abstract
The alkali-activation of titanium (Ti) surfaces performed in a heated sodium hydroxide (NaOH) aqueous solution, results in a porous layer rich in hydroxyl (OH) groups, the structure and porosity of which strongly depend on the reaction time and NaOH concentration used. In this study, a polymerization initiator is covalently grafted on the alkali-activated Ti substrates by using a phosphonic acid as coupling agent and the resulting surfaces are used as scaffolds to drive the growth of tethered poly(methyl methacrylate) (PMMA) chains via a surface initiated atom transfer radical polymerisation (SI-ATRP). A close-up investigation of how different treatment times (1 h, 3 h, 6 h, 12 h, and 24 h) and NaOH concentrations (0.1 M, 0.5 M, 1 M, 2 M, and 5 M) affect the final PMMA morphology and thickness are presented.
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Affiliation(s)
- Melania Reggente
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Sebastien Kriegel
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Wenjia He
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Patrick Masson
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Geneviève Pourroy
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Francesco Mura
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Jacques Faerber
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Heinz Palkowski
- Clausthal University of Technology (TUC), IMET Institute of Metallurgy , Robert-Koch-Strasse 42 , 38678 Clausthal-Zellerfeld , Germany
| | - Adele Carradò
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
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14
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Lacave JM, Vicario-Parés U, Bilbao E, Gilliland D, Mura F, Dini L, Cajaraville MP, Orbea A. Waterborne exposure of adult zebrafish to silver nanoparticles and to ionic silver results in differential silver accumulation and effects at cellular and molecular levels. Sci Total Environ 2018; 642:1209-1220. [PMID: 30045502 DOI: 10.1016/j.scitotenv.2018.06.128] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/06/2018] [Accepted: 06/10/2018] [Indexed: 06/08/2023]
Abstract
Effects of silver nanoparticles (Ag NPs) on freshwater species have been reported in several studies, but there is not information on the potential long-term consequences of a previous exposure. In this work, we investigated the long-term effects of maltose-coated Ag NPs (20 nm) and of ionic silver (10 μg/L) after 21 days of exposure and at 6 months post-exposure (mpe) in adult zebrafish. Exposure resulted in significant silver accumulation in the whole body of fish exposed to ionic silver, but not in those exposed to Ag NPs. However, autometallography revealed metal accumulation in the liver and intestine of fish treated with the two silver forms and especially in the intestine of fish exposed to Ag NPs. X-ray microanalysis showed the presence of silver in gills, liver and intestine and of Ag NPs in gill and liver cells. Inflammation and hyperplasia were evident in the gills after both treatments and these histopathological conditions remained at 6 mpe. According to the hepatic transcriptome analysis, at 3 days ionic silver regulated a larger number of transcripts (410) than Ag NPs (129), while at 21 days Ag NPs provoked a stronger effect (799 vs 165 regulated sequences). Gene ontology terms such as "metabolic processes" and "response to stimulus" appeared enriched after all treatments, while "immune system" or "reproductive processes" were specifically enriched after the exposure to Ag NPs. This suggests that the toxicity of Ag NPs may not be solely related to the release of Ag ions, but also to the NP form. No evident effects were found on protein oxidation or on hepatocyte lysosomal membrane stability during exposure, but effects recorded on liver lysosomes and persistent damage on gill tissue at 6 mpe could indicate potential for long-term effects in exposed fish.
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Affiliation(s)
- José María Lacave
- CBET Research group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940 Leioa, Basque Country, Spain
| | - Unai Vicario-Parés
- CBET Research group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940 Leioa, Basque Country, Spain
| | - Eider Bilbao
- CBET Research group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940 Leioa, Basque Country, Spain
| | - Douglas Gilliland
- European Commission, JRC Directorate F - Health, Consumers and Reference Materials, Via E. Fermi, 2749, I-21027 Ispra, VA, Italy
| | - Francesco Mura
- Dept. of Basic and Applied Sciences for Engineering and Center for Nanotechnologies Applied to Engineering, Sapienza University of Rome, Via A. Scarpa 16, Rome 00161, Italy
| | - Luciana Dini
- Dept. of Biological and Environmental Science and Technology, University of Salento, Prov.le Lecce-Monteroni, 73100 Lecce, Italy; CNR, Nanotec, 73100 Lecce, Italy
| | - Miren P Cajaraville
- CBET Research group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940 Leioa, Basque Country, Spain
| | - Amaia Orbea
- CBET Research group, Dept. of Zoology and Animal Cell Biology, Research Centre for Experimental Marine Biology and Biotechnology PiE and Science and Technology Faculty, University of the Basque Country (UPV/EHU), Sarriena z/g, E-48940 Leioa, Basque Country, Spain.
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15
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Anzai T, Aerni R, Wasko M, Mura F, Horikawa SI, Sato SI, Murase Y, Hatakeyama H. FDA SEND process streamlining and implementation – CT-compatible simulated study. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Paolini A, Leoni L, Giannicchi I, Abbaszadeh Z, D'Oria V, Mura F, Dalla Cort A, Masotti A. MicroRNAs delivery into human cells grown on 3D-printed PLA scaffolds coated with a novel fluorescent PAMAM dendrimer for biomedical applications. Sci Rep 2018; 8:13888. [PMID: 30224665 PMCID: PMC6141561 DOI: 10.1038/s41598-018-32258-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 09/03/2018] [Indexed: 11/25/2022] Open
Abstract
Many advanced synthetic, natural, degradable or non-degradable materials have been employed to create scaffolds for cell culture for biomedical or tissue engineering applications. One of the most versatile material is poly-lactide (PLA), commonly used as 3D printing filament. Manufacturing of multifunctional scaffolds with improved cell growth proliferation and able to deliver oligonucleotides represents an innovative strategy for controlled and localized gene modulation that hold great promise and could increase the number of applications in biomedicine. Here we report for the first time the synthesis of a novel Rhodamine derivative of a poly-amidoamine dendrimer (G = 5) able to transfect cells and to be monitored by confocal microscopy that we also employed to coat a 3D-printed PLA scaffold. The coating do not modify the oligonucleotide binding ability, toxicity or transfection properties of the scaffold that is able to increase cell proliferation and deliver miRNA mimics (i.e., pre-mir-503) into human cells. Although further experiments are required to optimize the dendrimer/miRNA ratio and improve transfection efficiency, we demonstrated the effectiveness of this promising and innovative 3D-printed transfection system to transfer miRNAs into human cells for future biomedical applications.
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Affiliation(s)
- Alessandro Paolini
- Bambino Gesù Children's Hospital-IRCCS, Research Laboratories, V.le di San Paolo 15, 00146, Rome, Italy.
| | - Luca Leoni
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Ilaria Giannicchi
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Zeinab Abbaszadeh
- Bambino Gesù Children's Hospital-IRCCS, Research Laboratories, V.le di San Paolo 15, 00146, Rome, Italy
| | - Valentina D'Oria
- Bambino Gesù Children's Hospital-IRCCS, Research Laboratories, V.le di San Paolo 15, 00146, Rome, Italy
| | - Francesco Mura
- Center for the Nanotechnology applied to the Engineering of La Sapienza (CNIS), Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Antonella Dalla Cort
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Andrea Masotti
- Bambino Gesù Children's Hospital-IRCCS, Research Laboratories, V.le di San Paolo 15, 00146, Rome, Italy.
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di Gregorio MC, Severoni E, Travaglini L, Gubitosi M, Sennato S, Mura F, Redondo-Gómez C, Jover A, Pavel NV, Galantini L. Bile acid derivative-based catanionic mixtures: versatile tools for superficial charge modulation of supramolecular lamellae and nanotubes. Phys Chem Chem Phys 2018; 20:18957-18968. [PMID: 29972162 DOI: 10.1039/c8cp02745e] [Citation(s) in RCA: 11] [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: 12/11/2022]
Abstract
Self-assembled structures formed by mixtures of cationic and anionic surfactants are interesting tools for applications requiring interactions with charged particles and molecules. Nevertheless, they present instability close to the equimolar composition and poor morphological versatility, which is generally restricted to vesicles and micelles. Against this general trend, we report on bile salt derivative based catanionic mixtures assembling in tubules and lamellae depending on the mixture composition. Electrophoretic mobility measurements prove that the composition also dictates their superficial charge, which can be tuned from negative to positive by increasing the positively charged surfactant fraction in the mixtures. The study of the catanionic aggregates was conducted by means of microscopy and spectroscopy techniques and compared to the self-assembly behaviors of the individual building blocks. This study broadens the so far small array of bile salt derivative catanionic systems, confirming their distinctive behavior in the spectrum of catanionic mixtures.
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18
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Suzon B, Radjiv G, Guilpain P, Le Quellec A, Maria A, Dufour S, Mura F, Schneider C, Konaté A, Rivière S. Neuro-Behçet malgré les anti-TNF alpha : à propos de 3 cas. Rev Med Interne 2018. [DOI: 10.1016/j.revmed.2018.03.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Living systems operate far from thermodynamic equilibrium. Enzymatic activity can induce broken detailed balance at the molecular scale. This molecular scale breaking of detailed balance is crucial to achieve biological functions such as high-fidelity transcription and translation, sensing, adaptation, biochemical patterning, and force generation. While biological systems such as motor enzymes violate detailed balance at the molecular scale, it remains unclear how non-equilibrium dynamics manifests at the mesoscale in systems that are driven through the collective activity of many motors. Indeed, in several cellular systems the presence of non-equilibrium dynamics is not always evident at large scales. For example, in the cytoskeleton or in chromosomes one can observe stationary stochastic processes that appear at first glance thermally driven. This raises the question how non-equilibrium fluctuations can be discerned from thermal noise. We discuss approaches that have recently been developed to address this question, including methods based on measuring the extent to which the system violates the fluctuation-dissipation theorem. We also review applications of this approach to reconstituted cytoskeletal networks, the cytoplasm of living cells, and cell membranes. Furthermore, we discuss a more recent approach to detect actively driven dynamics, which is based on inferring broken detailed balance. This constitutes a non-invasive method that uses time-lapse microscopy data, and can be applied to a broad range of systems in cells and tissue. We discuss the ideas underlying this method and its application to several examples including flagella, primary cilia, and cytoskeletal networks. Finally, we briefly discuss recent developments in stochastic thermodynamics and non-equilibrium statistical mechanics, which offer new perspectives to understand the physics of living systems.
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Affiliation(s)
- F S Gnesotto
- Arnold-Sommerfeld-Center for Theoretical Physics and Center for NanoScience, Ludwig-Maximilians-Universität München, D-80333 München, Germany
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Witkowski P, Guilpain P, Maria A, Goulabchand R, Mura F, Rivière S, Rullier P, Le Quellec A, Konaté A. Association polychondrite atrophiante, maladie de Crohn, spondylarthropathie B27, syndrome de Sweet et vascularite à ANCA. Rev Med Interne 2018. [DOI: 10.1016/j.revmed.2018.03.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Panzarini E, Mariano S, Carata E, Mura F, Rossi M, Dini L. Intracellular Transport of Silver and Gold Nanoparticles and Biological Responses: An Update. Int J Mol Sci 2018; 19:E1305. [PMID: 29702561 PMCID: PMC5983807 DOI: 10.3390/ijms19051305] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [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: 03/31/2018] [Revised: 04/21/2018] [Accepted: 04/23/2018] [Indexed: 12/12/2022] Open
Abstract
Medicine, food, and cosmetics represent the new promising applications for silver (Ag) and gold (Au) nanoparticles (NPs). AgNPs are most commonly used in food and cosmetics; conversely, the main applications of gold NPs (AuNPs) are in the medical field. Thus, in view of the risk of accidentally or non-intended uptake of NPs deriving from the use of cosmetics, drugs, and food, the study of NPs⁻cell interactions represents a key question that puzzles researchers in both the nanomedicine and nanotoxicology fields. The response of cells starts when the NPs bind to the cell surface or when they are internalized. The amount and modality of their uptake depend on many and diverse parameters, such as NPs and cell types. Here, we discuss the state of the art of the knowledge and the uncertainties regarding the biological consequences of AgNPs and AuNPs, focusing on NPs cell uptake, location, and translocation. Finally, a section will be dedicated to the most currently available methods for qualitative and quantitative analysis of intracellular transport of metal NPs.
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Affiliation(s)
- Elisa Panzarini
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy.
| | - Stefania Mariano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy.
| | - Elisabetta Carata
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy.
| | - Francesco Mura
- Department of Basic and Applied Science to Engineering, Sapienza University of Rome, 00161 Rome, Italy.
- Center for Nanotechnology Applied to Engineering of Sapienza (CNIS), Sapienza University of Rome, 00161 Rome, Italy.
| | - Marco Rossi
- Department of Basic and Applied Science to Engineering, Sapienza University of Rome, 00161 Rome, Italy.
- Center for Nanotechnology Applied to Engineering of Sapienza (CNIS), Sapienza University of Rome, 00161 Rome, Italy.
| | - Luciana Dini
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy.
- CNR-Nanotec, Institute of Nanotechnology, via Monteroni, 73100 Lecce, Italy.
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22
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Pantanella F, Iebba V, Mura F, Dini L, Totino V, Neroni B, Bonfiglio G, Maria T, Passariello C, Schippa S. Behaviour of Bdellovibrio bacteriovorus in the presence of Gram-positive Staphylococcus aureus. New Microbiol 2018; 41:145-152. [PMID: 29498744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
The present study aimed to characterize the behavior of Bdellovibrio bacteriovorus in the presence of Staphylococcus aureus. B. bacteriovorus was co-cultured with S. aureus or Pseudomonas aeruginosa or Streptococcus mutans, in planktonic and sessile conditions. Co-cultures were studied by Field-Emission Scanning Electron Microscopy (FESEM), Scanning Transmission Electron Microscopy (STEM), turbidimetry, quantitative PCR (qPCR), and sequencing of gene Bd0108 of B. bacteriovorus. Results indicated that B. bacteriovorus comparably inhibited planktonic growth of P. aeruginosa and S. aureus, but not of S. mutans. FESEM and STEM showed that B. bacteriovorus interacts with S. aureus affecting its cell wall and membrane. Sequencing of gene Bd0108 did not reveal any of the mutations that can arise from the host-interaction (hit) locus. Although some Gram-negative species are reported to be B. bacteriovorus prey, it seems that in case of nutrient deficiency this predatory bacterium can also take advantage of some Gram-positive species. B. bacteriovorus behaviour in the presence of S. aureus is relevant for its possible therapeutic use in several pathologies, like cystic fibrosis in which S. aureus and P. aeruginosa frequently coexist as infectious agents.
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Affiliation(s)
- Fabrizio Pantanella
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Valerio Iebba
- Institute Pasteur Cenci Bolognetti Foundation, Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Francesco Mura
- Department of Astronautical, Electrical and Energy Engineering, Sapienza Nanoscience & Nanotechnology Laboratories (SNN-Lab), 'Sapienza' University of Rome, Italy
| | - Luciana Dini
- Department of Biological and Environmental Sciences and Technologies - University of Salento, Lecce, Italy
| | - Valentina Totino
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Bruna Neroni
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Giulia Bonfiglio
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Trancassini Maria
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Claudio Passariello
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
| | - Serena Schippa
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Italy
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Fraison J, Mahr A, Rivière S, Mura F, Jorgensen C, Lhote F, Dhôte R, Bourgarit-Durand A, Fain O, Mouthon L, Brézin A, Terrier B. Étude du tabagisme sur le phénotype et le pronostic de la maladie de Behçet : une étude multicentrique de 496 cas. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.10.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Fraison J, Mahr A, Rivière S, Mura F, Jorgensen C, Lhote F, Dhôte R, Bourgarit-Durand A, Fain O, Mouthon L, Brézin A, Terrier B. Détermination de sous-classes phénotypiques de la maladie de Behçet par la méthode d’analyse « cluster » : une étude multicentrique de 496 cas. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.10.373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Fonseka HA, Ameruddin AS, Caroff P, Tedeschi D, De Luca M, Mura F, Guo Y, Lysevych M, Wang F, Tan HH, Polimeni A, Jagadish C. InP-In xGa 1-xAs core-multi-shell nanowire quantum wells with tunable emission in the 1.3-1.55 μm wavelength range. Nanoscale 2017; 9:13554-13562. [PMID: 28872181 DOI: 10.1039/c7nr04598k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The usability and tunability of the essential InP-InGaAs material combination in nanowire-based quantum wells (QWs) are assessed. The wurtzite phase core-multi-shell InP-InGaAs-InP nanowire QWs are characterised using cross-section transmission electron microscopy and photoluminescence measurements. The InP-InGaAs direct interface is found to be sharp while the InGaAs-InP inverted interface is more diffused, in agreement with their planar counterpart. Bright emission is observed from the single nanowires containing the QWs at room temperature, with no emission from the InP core or outer barrier. The tunability of the QW emission wavelength in the 1.3-1.55 μm communication wavelength range is demonstrated by varying the QW thickness and in the 1.3 μm range by varying the composition. The experiments are supported by simulation of the emission wavelength of the wurtzite phase InP-InGaAs QWs in the thickness range considered. The radial heterostructure is further extended to design multiple QWs with bright emission, therefore establishing the capability of this material system for nanowire based optical devices for communication applications.
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Affiliation(s)
- H A Fonseka
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
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Francioso A, Dinarelli S, Girasole M, Cervoni L, d’Erme M, Mura F, Boffi A, Montanari E, Mosca L. Behind Resveratrol Stabilization by Carboxymethylated (1,3/1,6)-β-d-Glucan: Does the Polyphenol Play a Role in Polymer Structural Organization? Int J Mol Sci 2017; 18:ijms18092006. [PMID: 32961650 PMCID: PMC5618655 DOI: 10.3390/ijms18092006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/11/2017] [Accepted: 09/15/2017] [Indexed: 02/02/2023] Open
Abstract
Resveratrol stability in solution can be improved by combining the polyphenol with carboxymethylated (1,3/1,6)-β-d-glucan (CM-glucan), a carbohydrate polymer widely used in the food and pharmaceutical industries. The present work was undertaken to elucidate the mechanism behind this stabilizing effect. The supramolecular structural, physico-chemical and morphological features of the CM-glucan/resveratrol complex have been studied under different physical and chemical stimuli by means of spectroscopic techniques, microscopy and physical methods such as UV-Visible spectroscopy (UV-Vis), spectrofluorimetry, Circular Dichroism (CD), Infrared spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC), Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). Our experimental data indicate that CM-glucan conformational organized architecture in aqueous solution is enhanced in the presence of resveratrol, suggesting that the polyphenol is able to confer a high degree of order to the polymer by a probable cooperative structural organization that results in a long term stabilization for the polyphenol.
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Affiliation(s)
- Antonio Francioso
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy; (L.C.); (M.d’E.); (A.B.); (L.M.)
- Correspondence: ; Tel.: +39-06-4991-0923; Fax: +39-06-4440-062
| | - Simone Dinarelli
- ISM Institute of Material Structure, CNR National Research Council-Rome, 00185 Rome, Italy; (S.D.); (M.G.)
| | - Marco Girasole
- ISM Institute of Material Structure, CNR National Research Council-Rome, 00185 Rome, Italy; (S.D.); (M.G.)
| | - Laura Cervoni
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy; (L.C.); (M.d’E.); (A.B.); (L.M.)
| | - Maria d’Erme
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy; (L.C.); (M.d’E.); (A.B.); (L.M.)
| | - Francesco Mura
- CNIS Research center for Nanotechnology Applications-Rome, 00185 Rome, Italy;
| | - Alberto Boffi
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy; (L.C.); (M.d’E.); (A.B.); (L.M.)
| | - Elita Montanari
- Department of Drug Chemistry and Technology, Sapienza University of Rome, 00185 Rome, Italy;
| | - Luciana Mosca
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy; (L.C.); (M.d’E.); (A.B.); (L.M.)
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Teggi R, Manfrin M, Balzanelli C, Gatti O, Mura F, Quaglieri S, Pilolli F, Redaelli de Zinis LO, Benazzo M, Bussi M. Point prevalence of vertigo and dizziness in a sample of 2672 subjects and correlation with headaches. Acta Otorhinolaryngol Ital 2017; 36:215-9. [PMID: 27214833 PMCID: PMC4977009 DOI: 10.14639/0392-100x-847] [Citation(s) in RCA: 29] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Accepted: 12/09/2015] [Indexed: 12/03/2022]
Abstract
Vertigo and dizziness are common symptoms in the general population, with an estimated prevalence between 20% and 56%. The aim of our work was to assess the point prevalence of these symptoms in a population of 2672 subjects. Patients were asked to answer a questionnaire; in the first part they were asked about demographic data and previous vertigo and or dizziness. Mean age of the sample was 48.3 ± 15 years, and 46.7% were males. A total of 1077 (40.3%) subjects referred vertigo/dizziness during their lifetime, and the mean age of the first vertigo attack was 39.2 ± 15.4 years; in the second part they were asked about the characteristics of vertigo (age of first episode, rotational vertigo, relapsing episodes, positional exacerbation, presence of cochlear symptoms) and lifetime presence of moderate to severe headache and its clinical features (hemicranial, pulsatile, associated with phono and photophobia, worse on effort). An age and sex effect was demonstrated, with symptoms 4.4 times more elevated in females and 1.8 times in people over 50 years. In the total sample of 2672 responders, 13.7% referred a sensation of spinning, 26.3% relapsing episodes, 12.9% positional exacerbation and 4.8% cochlear symptoms; 34.8% referred headache during their lifetime. Subjects suffering from headache presented an increased rate of relapsing episodes, positional exacerbation, cochlear symptoms and a lower age of occurrence of the first vertigo/dizziness episode. In the discussion, our data are compared with those of previous studies, and we underline the relationship between vertigo/dizziness from one side and headache with migrainous features on the other.
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Affiliation(s)
- R Teggi
- ENT Division, San Raffaele Scientific Institute, Milan, Italy
| | - M Manfrin
- UOC of ORL, Fondazione IRCCS Policlinico San Matteo e Università di Pavia, Italy
| | - C Balzanelli
- Divisione di Otorinolaringoiatria, Università degli Studi di Brescia, Italy
| | - O Gatti
- ENT Division, San Raffaele Scientific Institute, Milan, Italy
| | - F Mura
- UOC of ORL, Fondazione IRCCS Policlinico San Matteo e Università di Pavia, Italy
| | - S Quaglieri
- UOC of ORL, Fondazione IRCCS Policlinico San Matteo e Università di Pavia, Italy
| | - F Pilolli
- ENT Division, San Raffaele Scientific Institute, Milan, Italy
| | | | - M Benazzo
- UOC of ORL, Fondazione IRCCS Policlinico San Matteo e Università di Pavia, Italy
| | - M Bussi
- ENT Division, San Raffaele Scientific Institute, Milan, Italy
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28
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Tomassetti MC, Cirigliano A, Arrighi C, Negri R, Mura F, Maneschi ML, Gentili MD, Stirpe M, Mazzoni C, Rinaldi T. A role for microbial selection in frescoes' deterioration in Tomba degli Scudi in Tarquinia, Italy. Sci Rep 2017; 7:6027. [PMID: 28729734 PMCID: PMC5519700 DOI: 10.1038/s41598-017-06169-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 06/09/2017] [Indexed: 11/30/2022] Open
Abstract
Mural paintings in the hypogeal environment of the Tomba degli Scudi in Tarquinia, Italy, show a quite dramatic condition: the plaster mortar lost his cohesion and a white layer coating is spread over almost all the wall surfaces. The aim of this research is to verify if the activity of microorganisms could be one of the main causes of deterioration and if the adopted countermeasures (conventional biocide treatments) are sufficient to stop it. A biocide treatment of the whole environment has been carried out before the conservative intervention and the tomb has been closed for one month. When the tomb was opened again, we sampled the microorganisms present on the frescoes and we identified four Bacillus species and one mould survived to the biocide treatment. These organisms are able to produce spores, a highly resistant biological form, which has permitted the survival despite the biocide treatment. We show that these Bacillus strains are able to produce calcium carbonate and could be responsible for the white deposition that was damaging and covering the entire surface of the frescoes. Our results confirm that the sanitation intervention is non always resolutive and could even be deleterious in selecting harmful microbial communities.
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Affiliation(s)
| | - Angela Cirigliano
- La Sapienza University of Rome, Departement of Biology and Biotechnology "Charles Darwin", Piazzale Aldo Moro, 5, 00185, Rome, Italy
| | - Chiara Arrighi
- Freelance restorer, Via San Maria Mediatrice 10, 00165, Rome, Italy
| | - Rodolfo Negri
- La Sapienza University of Rome, Departement of Biology and Biotechnology "Charles Darwin", Piazzale Aldo Moro, 5, 00185, Rome, Italy
| | - Francesco Mura
- La Sapienza University of Rome, Departement of Chemistry, Piazzale Aldo Moro, 5, 00185, Rome, Italy
| | - Maria Lorella Maneschi
- Archaeologist, Presidente FAI, Delegazione Viterbo, Via XX Settembre 56, 01016, Tarquinia, Italy
| | | | - Mariarita Stirpe
- La Sapienza University of Rome, Departement of Biology and Biotechnology "Charles Darwin", Piazzale Aldo Moro, 5, 00185, Rome, Italy
| | - Cristina Mazzoni
- La Sapienza University of Rome, Departement of Biology and Biotechnology "Charles Darwin", Piazzale Aldo Moro, 5, 00185, Rome, Italy
| | - Teresa Rinaldi
- La Sapienza University of Rome, Departement of Biology and Biotechnology "Charles Darwin", Piazzale Aldo Moro, 5, 00185, Rome, Italy.
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29
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Panzarini E, Mariano S, Vergallo C, Carata E, Fimia GM, Mura F, Rossi M, Vergaro V, Ciccarella G, Corazzari M, Dini L. Glucose capped silver nanoparticles induce cell cycle arrest in HeLa cells. Toxicol In Vitro 2017; 41:64-74. [PMID: 28223142 DOI: 10.1016/j.tiv.2017.02.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/16/2017] [Accepted: 02/17/2017] [Indexed: 01/25/2023]
Abstract
This study aims to determine the interaction (uptake and biological effects on cell viability and cell cycle progression) of glucose capped silver nanoparticles (AgNPs-G) on human epithelioid cervix carcinoma (HeLa) cells, in relation to amount, 2×103 or 2×104 NPs/cell, and exposure time, up to 48h. The spherical and well dispersed AgNPs (30±5nm) were obtained by using glucose as reducing agent in a green synthesis method that ensures to stabilize AgNPs avoiding cytotoxic soluble silver ions Ag+ release. HeLa cells take up abundantly and rapidly AgNPs-G resulting toxic to cells in amount and incubation time dependent manner. HeLa cells were arrested at S and G2/M phases of the cell cycle and subG1 population increased when incubated with 2×104 AgNPs-G/cell. Mitotic index decreased accordingly. The dissolution experiments demonstrated that the observed effects were due only to AgNPs-G since glucose capping prevents Ag+ release. The AgNPs-G influence on HeLa cells viability and cell cycle progression suggest that AgNPs-G, alone or in combination with chemotherapeutics, may be exploited for the development of novel antiproliferative treatment in cancer therapy. However, the possible influence of the cell cycle on cellular uptake of AgNPs-G and the mechanism of AgNPs entry in cells need further investigation.
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Affiliation(s)
- Elisa Panzarini
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy.
| | - Stefania Mariano
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy.
| | - Cristian Vergallo
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy.
| | - Elisabetta Carata
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy.
| | - Gian Maria Fimia
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy.
| | - Francesco Mura
- Department of Base and Applied Science to Engineering, Sapienza University of Rome, Rome, Italy.
| | - Marco Rossi
- Department of Base and Applied Science to Engineering, Sapienza University of Rome, Rome, Italy.
| | - Viviana Vergaro
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy
| | - Giuseppe Ciccarella
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy; Institute of Nanotechnology - CNR (CNR-NANOTEC) Via Monteroni, 73100 Lecce, Italy
| | - Marco Corazzari
- Department of Biology, University of Rome Tor Vergata, Rome, Italy.
| | - Luciana Dini
- Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Lecce, Italy; CNR Nanotec, Lecce, Italy.
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Fasolato C, Giantulli S, Silvestri I, Mazzarda F, Toumia Y, Ripanti F, Mura F, Luongo F, Costantini F, Bordi F, Postorino P, Domenici F. Folate-based single cell screening using surface enhanced Raman microimaging. Nanoscale 2016; 8:17304-17313. [PMID: 27714135 DOI: 10.1039/c6nr05057c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Recent progress in nanotechnology and its application to biomedical settings have generated great advantages in dealing with early cancer diagnosis. The identification of the specific properties of cancer cells, such as the expression of particular plasma membrane molecular receptors, has become crucial in revealing the presence and in assessing the stage of development of the disease. Here we report a single cell screening approach based on Surface Enhanced Raman Scattering (SERS) microimaging. We fabricated a SERS-labelled nanovector based on the biofunctionalization of gold nanoparticles with folic acid. After treating the cells with the nanovector, we were able to distinguish three different cell populations from different cell lines (cancer HeLa and PC-3, and normal HaCaT lines), suitably chosen for their different expressions of folate binding proteins. The nanovector, indeed, binds much more efficiently on cancer cell lines than on normal ones, resulting in a higher SERS signal measured on cancer cells. These results pave the way for applications in single cell diagnostics and, potentially, in theranostics.
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Affiliation(s)
- C Fasolato
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy. and Center for Life Nanoscience, Istituto Italiano di Tecnologia, V.le Regina Elena 291, Rome, Italy
| | - S Giantulli
- Dipartimento di Medicina Molecolare, Università Sapienza, P.le Aldo Moro 5, Rome, Italy
| | - I Silvestri
- Dipartimento di Medicina Molecolare, Università Sapienza, P.le Aldo Moro 5, Rome, Italy
| | - F Mazzarda
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy.
| | - Y Toumia
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, Rome, Italy
| | - F Ripanti
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy.
| | - F Mura
- Dipartimento di Chimica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy
| | - F Luongo
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy.
| | - F Costantini
- Dipartimento di Chimica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy
| | - F Bordi
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy. and CNR-ISC UOS Roma, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
| | - P Postorino
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy.
| | - F Domenici
- Dipartimento di Fisica, Università Sapienza, P.le Aldo Moro 5, Rome, Italy. and Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, Rome, Italy
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Anzai T, Hatakeyama H, Horikawa S, Sakurai J, Iwata H, Aerni R, Mura F, Wasko M, Kaufman L. Actions for FDA SEND: What pathologists/toxicologists need to know. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.2061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rota MB, Ameruddin AS, Fonseka HA, Gao Q, Mura F, Polimeni A, Miriametro A, Tan HH, Jagadish C, Capizzi M. Bandgap Energy of Wurtzite InAs Nanowires. Nano Lett 2016; 16:5197-203. [PMID: 27467011 DOI: 10.1021/acs.nanolett.6b02205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
InAs nanowires (NWs) have been grown on semi-insulating InAs (111)B substrates by metal-organic chemical vapor deposition catalyzed by 50, 100, and 150 nm-sized Au particles. The pure wurtzite (WZ) phase of these NWs has been attested by high-resolution transmission electron microscopy and selected area diffraction pattern measurements. Low temperature photoluminescence measurements have provided unambiguous and robust evidence of a well resolved, isolated peak at 0.477 eV, namely 59 meV higher than the band gap of ZB InAs. The WZ nature of this energy band has been demonstrated by high values of the polarization degree, measured in ensembles of NWs both as-grown and mechanically transferred onto Si and GaAs substrates, in agreement with the polarization selection rules for WZ crystals. The value of 0.477 eV found here for the bandgap energy of WZ InAs agrees well with theoretical calculations.
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Affiliation(s)
- Michele B Rota
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 5, 00185 Roma, Italy
| | - Amira S Ameruddin
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - H Aruni Fonseka
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - Qiang Gao
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - Francesco Mura
- Dipartimento di Chimica, Sapienza Università di Roma , Piazzale A. Moro 5, 00185 Roma, Italy
| | - Antonio Polimeni
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 5, 00185 Roma, Italy
| | - Antonio Miriametro
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 5, 00185 Roma, Italy
| | - H Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - Mario Capizzi
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 5, 00185 Roma, Italy
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Toumia Y, Domenici F, Orlanducci S, Mura F, Grishenkov D, Trochet P, Lacerenza S, Bordi F, Paradossi G. Graphene Meets Microbubbles: A Superior Contrast Agent for Photoacoustic Imaging. ACS Appl Mater Interfaces 2016; 8:16465-75. [PMID: 27269868 DOI: 10.1021/acsami.6b04184] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Coupling graphene with a soft polymer surface offers the possibility to build hybrid constructs with new electrical, optical, and mechanical properties. However, the low reactivity of graphene is a hurdle in the synthesis of such systems which is often bypassed by oxidizing its carbon planar structure. However, the defects introduced with this process jeopardize the properties of graphene. In this paper we present a different approach, applicable to many different polymer surfaces, which uses surfactant assisted ultrasonication to exfoliate, and simultaneously suspend, graphene in water in its intact form. Tethering pristine graphene sheets to the surfaces is accomplished by using suitable reactive functional groups of the surfactant scaffold. We focused on applying this approach to the fabrication of a hybrid system, made of pristine graphene tethered to poly(vinyl alcohol) based microbubbles (PVA MBs), designed for enhancing photoacoustic signals. Photoacoustic imaging (PAI) is a powerful preclinical diagnostic tool which provides real time images at a resolution of 40 μm. The leap toward clinical imaging has so far been hindered by the limited tissues penetration of near-infrared (NIR) pulsed laser radiation. Many academic and industrial research laboratories have met this challenge by designing devices, each with pros and cons, to enhance the photoacoustic (PA) signal. The major advantages of the hybrid graphene/PVA MBs construct, however, are (i) the preservation of graphene properties, (ii) biocompatibility, a consequence of the robust anchoring of pristine graphene to the bioinert surface of the PVA bubble, and (iii) a very good enhancement in a NIR spectral region of the PA signal, which does not overlap with the signals of PA active endogenous molecules such as hemoglobin.
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Affiliation(s)
- Yosra Toumia
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata , Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Fabio Domenici
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata , Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Silvia Orlanducci
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata , Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Francesco Mura
- CNIS, Università di Roma Sapienza , P.le Aldo Moro, 00185, Rome, Italy
| | - Dmitry Grishenkov
- KTH, Royal Institute of Technology , Alfred Nobels Allé 10, SE 141 152, Stockholm, Sweden
| | - Philippe Trochet
- FUJIFILM VisualSonics , Joop Geesinkweg 140, 1114 AB Amsterdam, The Netherlands
| | - Savino Lacerenza
- FUJIFILM VisualSonics , Joop Geesinkweg 140, 1114 AB Amsterdam, The Netherlands
| | - Federico Bordi
- Dipartimento di Fisica, Università di Roma Sapienza , P.le Aldo Moro, 00185, Rome, Italy
| | - Gaio Paradossi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata , Via della Ricerca Scientifica, 00133, Rome, Italy
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Oliva S, Farina S, Pinna S, Guala I, Agnetta D, Ariotti PA, Mura F, Ceccherelli G. Determinants of Paracentrotus lividus sea urchin recruitment under oligotrophic conditions: Implications for conservation management. Mar Environ Res 2016; 117:13-20. [PMID: 27043483 DOI: 10.1016/j.marenvres.2016.02.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/21/2016] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
Sea urchins may deeply shape the structure of macrophyte-dominated communities and require the implementation of sustainable management strategies. In the Mediterranean, the identification of the major recruitment determinants of the keystone sea urchin species Paracentrotus lividus is required, so that source areas of the populations can be identified and exploitation or programmed harvesting can be spatially managed. In this study a collection of eight possible determinants, these encompassing both the biotic (larvae, adult sea urchins, fish, encrusting coralline algae, habitat type and spatial arrangement of habitats) and abiotic (substrate complexity and nutritional status) realms was considered at different spatial scales (site, area, transect and quadrat). Data from a survey including sites subject to different levels of human influence (i.e. from urbanized to protected areas), but all corresponding to an oligotrophic and low-populated region were fitted by means of a generalized linear mixed model. Despite the extensive sampling effort of benthic quadrats, an overall paucity of recruits was found, recruits being aggregated in a very small number of quadrats and in few areas. The analysis of data detected substrate complexity, and adult sea urchin and predatory fish abundances as the momentous determinants of Paracentrotus lividus recruitment. Possible mechanisms of influence are discussed beyond the implications of conservation management.
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Affiliation(s)
- Silvia Oliva
- Dipartimento di Scienze della Natura e del Territorio, Università degli Studi di Sassari, 07100 Sassari, Italy.
| | - Simone Farina
- IMC - International Marine Centre, Loc. Sa Mardini Torregrande, 09170 Oristano, Italy
| | - Stefania Pinna
- Dipartimento di Scienze della Natura e del Territorio, Università degli Studi di Sassari, 07100 Sassari, Italy
| | - Ivan Guala
- IMC - International Marine Centre, Loc. Sa Mardini Torregrande, 09170 Oristano, Italy
| | - Davide Agnetta
- CNR - IAMC, Via G. da Verrazzano 17, 91014 Castellammare del Golfo, Trapani, Italy
| | - Pierre Antoine Ariotti
- Université de Nice Sophia - Antipolis, Faculté des Sciences, EA 4228 ECOMERS, Nice, France
| | - Francesco Mura
- Dipartimento di Scienze della Natura e del Territorio, Università degli Studi di Sassari, 07100 Sassari, Italy
| | - Giulia Ceccherelli
- Dipartimento di Scienze della Natura e del Territorio, Università degli Studi di Sassari, 07100 Sassari, Italy
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Domenici F, Fasolato C, Mazzi E, De Angelis L, Brasili F, Mura F, Postorino P, Bordi F. Engineering microscale two-dimensional gold nanoparticle cluster arrays for advanced Raman sensing: An AFM study. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.03.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Tedeschi D, De Luca M, Fonseka HA, Gao Q, Mura F, Tan HH, Rubini S, Martelli F, Jagadish C, Capizzi M, Polimeni A. Long-Lived Hot Carriers in III-V Nanowires. Nano Lett 2016; 16:3085-93. [PMID: 27104870 DOI: 10.1021/acs.nanolett.6b00251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Heat management mechanisms play a pivotal role in driving the design of nanowire (NW)-based devices. In particular, the rate at which charge carriers cool down after an external excitation is crucial for the efficiency of solar cells, lasers, and high-speed transistors. Here, we investigate the thermalization properties of photogenerated carriers by continuous-wave (cw) photoluminescence (PL) in InP and GaAs NWs. A quantitative analysis of the PL spectra recorded up to 310 K shows that carriers can thermalize at a temperature much higher than that of the lattice. We find that the mismatch between carrier and lattice temperature, ΔT, increases exponentially with lattice temperature and depends inversely on the NW diameter. ΔT is instead independent of other NW characteristics, such as crystal structure (wurtzite vs zincblende), chemical composition (InP vs GaAs), shape (tapered vs columnar NWs), and growth method (vapor-liquid-solid vs selective-area growth). Remarkably, carrier temperatures as high as 500 K are reached at the lattice temperature of 310 K in NWs with ∼70 nm diameter. While a population of nonequilibrium carriers, usually referred to as "hot carriers", is routinely generated by high-power laser pulses and detected by ultrafast spectroscopy, it is quite remarkable that it can be observed in cw PL measurements, when a steady-state population of carriers is established. Time-resolved PL measurements show that even in the thinnest NWs carriers have enough time (∼1 ns) after photoexcitation to interact with phonons and thus to release their excess energy. Nevertheless, the inability of carriers to reach a full thermal equilibrium with the lattice points to inhibited phonon emission primarily caused by the large surface-to-volume ratio of small diameter NWs.
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Affiliation(s)
- D Tedeschi
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
| | - M De Luca
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
| | - H A Fonseka
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - Q Gao
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - F Mura
- Dipartimento di Chimica and Sapienza Nanoscience & Nanotechnology Lab (SNN-LAB), Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
| | - H H Tan
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - S Rubini
- Istituto Officina dei Materiali CNR , Basovizza SS 14 km 163.5, 34149 Trieste, Italy
| | - F Martelli
- Istituto per la Microelettronica e i Microsistemi CNR , Via del fosso del cavaliere 100, 00133 Roma, Italy
| | - C Jagadish
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 2601, Australia
| | - M Capizzi
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
| | - A Polimeni
- Dipartimento di Fisica, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
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Longo G, Ioannidu CA, Scotto d’Abusco A, Superti F, Misiano C, Zanoni R, Politi L, Mazzola L, Iosi F, Mura F, Scandurra R. Improving Osteoblast Response In Vitro by a Nanostructured Thin Film with Titanium Carbide and Titanium Oxides Clustered around Graphitic Carbon. PLoS One 2016; 11:e0152566. [PMID: 27031101 PMCID: PMC4816526 DOI: 10.1371/journal.pone.0152566] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 03/16/2016] [Indexed: 01/27/2023] Open
Abstract
Introduction Recently, we introduced a new deposition method, based on Ion Plating Plasma Assisted technology, to coat titanium implants with a thin but hard nanostructured layer composed of titanium carbide and titanium oxides, clustered around graphitic carbon. The nanostructured layer has a double effect: protects the bulk titanium against the harsh conditions of biological tissues and in the same time has a stimulating action on osteoblasts. Results The aim of this work is to describe the biological effects of this layer on osteoblasts cultured in vitro. We demonstrate that the nanostructured layer causes an overexpression of many early genes correlated to proteins involved in bone turnover and an increase in the number of surface receptors for α3β1 integrin, talin, paxillin. Analyses at single-cell level, by scanning electron microscopy, atomic force microscopy, and single cell force spectroscopy, show how the proliferation, adhesion and spreading of cells cultured on coated titanium samples are higher than on uncoated titanium ones. Finally, the chemistry of the layer induces a better formation of blood clots and a higher number of adhered platelets, compared to the uncoated cases, and these are useful features to improve the speed of implant osseointegration. Conclusion In summary, the nanostructured TiC film, due to its physical and chemical properties, can be used to protect the implants and to improve their acceptance by the bone.
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Affiliation(s)
- Giovanni Longo
- Istituto di Struttura della Materia, CNR, Via del Fosso del Cavaliere 100, 00133, Roma, Italy
- Ecole Polytechnique Fédérale de Lausanne, SB IPSB LPMV, BSP 409 (Cubotron UNIL), R.te de la Sorge, CH-1015, Lausanne, Switzerland
- * E-mail:
| | - Caterina Alexandra Ioannidu
- Dipartimento di Scienze Biochimiche, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Anna Scotto d’Abusco
- Dipartimento di Scienze Biochimiche, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Fabiana Superti
- Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, Viale Regina Elena, 299, Roma, Italy
| | | | - Robertino Zanoni
- Dipartimento di Chimica, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Laura Politi
- Dipartimento di Scienze Biochimiche, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Luca Mazzola
- Dipartimento di Scienze Biochimiche, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Francesca Iosi
- Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, Viale Regina Elena, 299, Roma, Italy
| | - Francesco Mura
- Dipartimento di Chimica, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Roberto Scandurra
- Dipartimento di Scienze Biochimiche, Università di Roma ‘La Sapienza’, Piazzale Aldo Moro 5, 00185, Roma, Italy
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Anzai T, Kaufman L, Aerni R, Mura F, Schuster M, Buchanan R, Wasko M. FDA SEND in non-US countries responses to the standard for exchange of nonclinical data (SEND) in non-US countries. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Scaramuzzo FA, Pozio A, Masci A, Mura F, Dell’Era A, Curulli A, Pasquali M. Efficient photocurrent generation using a combined Ni-TiO2 nanotubes anode. J APPL ELECTROCHEM 2015. [DOI: 10.1007/s10800-015-0837-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mura F, Silva T, Castro C, Borges F, Zuñiga MC, Morales J, Olea-Azar C. New insights into the antioxidant activity of hydroxycinnamic and hydroxybenzoic systems: spectroscopic, electrochemistry, and cellular studies. Free Radic Res 2014; 48:1473-84. [PMID: 25236566 DOI: 10.3109/10715762.2014.965702] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A series hydroxycinnamic and gallic acids and their derivatives were studied with the aim of evaluating their in vitro antioxidant properties both in homogeneous and in cellular systems. It was concluded from the oxygen radical absorbance capacity-fluorescein (ORAC-FL), 1,1-diphenyl-2-picrylhydrazyl (DPPH), and cyclic voltammetry data that some compounds exhibit remarkable antioxidant properties. In general, in homogeneous media (DPPH assay), galloyl-based cinnamic and benzoic systems (compounds 7-11) were the most active, exhibiting the lowest oxidation potentials in both dimethyl sulfoxide (DMSO) and phosphate buffer. Yet, p-coumaric acid and its derivatives (compounds 1-3) disclosed the highest scavenging activity toward peroxyl radicals (ORAC-FL assay). Interesting structure-property- activity relationships between ORAC-FL, or DPPH radical, and redox potentials have been attained, showing that the latter parameter can be a valuable antioxidant measure. It was evidenced that redox potentials are related to the structural features of cinnamic and benzoic systems and that their activities are also dependent on the radical generated in the assay. Electron spin resonance data of the phenoxyl radicals generated both in DMSO and phosphate buffer support the assumption that radical stability is related to the type of phenolic system. Galloyl-based cinnamic and benzoic ester-type systems (compounds 9 and 11) were the most active and effective compounds in cell-based assays (51.13 ± 1.27% and 54.90 ± 3.65%, respectively). In cellular systems, hydroxycinnamic and hydroxybenzoic systems operate based on their intrinsic antioxidant outline and lipophilic properties, so the balance between these two properties is considered of the utmost importance to ensure their performance in the prevention or minimization of the effects due to free radical overproduction.
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Affiliation(s)
- F Mura
- Department of Inorganic and Analytical Chemistry, Laboratory of Free Radicals and Antioxidants, Faculty of Chemical and Pharmaceutical Sciences, University of Chile , Santiago de Chile , Chile
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De Luca M, Polimeni A, Fonseka HA, Meaney AJ, Christianen PCM, Maan JC, Paiman S, Tan HH, Mura F, Jagadish C, Capizzi M. Magneto-optical properties of wurtzite-phase InP nanowires. Nano Lett 2014; 14:4250-4256. [PMID: 24972081 DOI: 10.1021/nl500870e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The possibility to grow in zincblende (ZB) and/or wurtzite (WZ) crystal phase widens the potential applications of semiconductor nanowires (NWs). This is particularly true in technologically relevant III-V compounds, such as GaAs, InAs, and InP, for which WZ is not available in bulk form. The WZ band structure of many III-V NWs has been widely studied. Yet, transport (that is, carrier effective mass) and spin (that is, carrier g-factor) properties are almost experimentally unknown. We address these issues in a well-characterized material: WZ indium phosphide. The value and anisotropy of the reduced mass (μ exc) and g-factor (g exc) of the band gap exciton are determined by photoluminescence measurements under intense magnetic fields (B, up to 28 T) applied along different crystallographic directions. μ exc is 14% greater in WZ NWs than in a ZB bulk reference and it is 6% greater in a plane containing the WZ ĉ axis than in a plane orthogonal to ĉ. The Zeeman splitting is markedly anisotropic with g exc = |ge| = 1.4 for B⊥ĉ (where ge is the electron g-factor) and g exc = |ge - gh,//| = 3.5 for B//ĉ (where gh,// is the hole g-factor). A noticeable B-induced circular dichroism of the emitted photons is found only for B//ĉ, as expected in WZ-phase materials.
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Affiliation(s)
- M De Luca
- Dipartimento di Fisica and CNISM, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
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Iebba V, Totino V, Santangelo F, Gagliardi A, Ciotoli L, Virga A, Ambrosi C, Pompili M, De Biase RV, Selan L, Artini M, Pantanella F, Mura F, Passariello C, Nicoletti M, Nencioni L, Trancassini M, Quattrucci S, Schippa S. Bdellovibrio bacteriovorus directly attacks Pseudomonas aeruginosa and Staphylococcus aureus Cystic fibrosis isolates. Front Microbiol 2014; 5:280. [PMID: 24926292 PMCID: PMC4046265 DOI: 10.3389/fmicb.2014.00280] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Accepted: 05/22/2014] [Indexed: 01/05/2023] Open
Abstract
Bdellovibrio bacteriovorus is a predator bacterial species found in the environment and within the human gut, able to attack Gram-negative prey. Cystic fibrosis (CF) is a genetic disease which usually presents lung colonization by Pseudomonas aeruginosa or Staphylococcus aureus biofilms. Here, we investigated the predatory behavior of B. bacteriovorus against these two pathogenic species with: (1) broth culture; (2) "static" biofilms; (3) field emission scanning electron microscope (FESEM); (4) "flow" biofilms; (5) zymographic technique. We had the first evidence of B. bacteriovorus survival with a Gram-positive prey, revealing a direct cell-to-cell contact with S. aureus and a new "epibiotic" foraging strategy imaged with FESEM. Mean attaching time of HD100 to S. aureus cells was 185 s, while "static" and "flow" S. aureus biofilms were reduced by 74 (at 24 h) and 46% (at 20 h), respectively. Furthermore, zymograms showed a differential bacteriolytic activity exerted by the B. bacteriovorus lysates on P. aeruginosa and S. aureus. The dual foraging system against Gram-negative (periplasmic) and Gram-positive (epibiotic) prey could suggest the use of B. bacteriovorus as a "living antibiotic" in CF, even if further studies are required to simulate its in vivo predatory behavior.
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Affiliation(s)
- Valerio Iebba
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Valentina Totino
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Floriana Santangelo
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Antonella Gagliardi
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Luana Ciotoli
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Alessandra Virga
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Cecilia Ambrosi
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Monica Pompili
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Riccardo V De Biase
- Department of Pediatrics and Neuropsychiatry, "Sapienza" University Rome, Italy
| | - Laura Selan
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Marco Artini
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Fabrizio Pantanella
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Francesco Mura
- Sapienza Nanoscience and Nanotecnology Laboratories, Department of Fundamental and Applied Sciences for Engineering, "Sapienza" University Rome, Italy
| | - Claudio Passariello
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Mauro Nicoletti
- Section of Microbiology, Department of Biomedical Sciences, University G. D'Annunzio Chieti, Italy
| | - Lucia Nencioni
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Maria Trancassini
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
| | - Serena Quattrucci
- Department of Pediatrics and Neuropsychiatry, "Sapienza" University Rome, Italy
| | - Serena Schippa
- Microbiology Section, Department of Public Health and Infectious Diseases, "Sapienza" University Rome, Italy
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Fraison JB, Rivière S, Konate AP, Mura F, Schneider C, Cerutti D, Schiffmann A, Guilpain P, Jorgensen C, Le Quellec A. Manifestations psychiatriques au cours de la maladie de Behçet : étude rétrospective monocentrique de 98 patients. Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Partouche L, Riviere S, Mura F, Le Quellec A. Mydriase bilatérale hyporéactive définitive induite par la moxifloxacine. Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.03.272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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De Luca M, Polimeni A, Capizzi M, Meaney AJ, Christianen PCM, Maan JK, Mura F, Rubini S, Martelli F. Determination of exciton reduced mass and gyromagnetic factor of wurtzite (InGa)As nanowires by photoluminescence spectroscopy under high magnetic fields. ACS Nano 2013; 7:10717-10725. [PMID: 24261718 DOI: 10.1021/nn405743t] [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: 06/02/2023]
Abstract
Semiconductor nanowires (NWs) have the prospect of being employed as basic units for nanoscale devices and circuits. However, the impact of their one-dimensional geometry and peculiar crystal phase on transport and spin characteristics remains largely unknown. We determine the exciton reduced mass and gyromagnetic factor of (InGa)As NWs in the wurtzite phase by photoluminescence (PL) spectroscopy under very high magnetic fields. For B perpendicular to the NW ĉ axis, the exciton reduced mass is 10% greater than that expected for the zincblende phase and no field-induced circular polarization of PL is observed. For B parallel to ĉ, an exciton reduced mass 35% greater than that of the zincblende phase is derived. Moreover, a circular dichroism of 70% is found at 28 T. Finally, an analysis of the PL line shape points at two Zeeman split levels, whose separation corresponds to an exciton gyromagnetic factor |g(e) - g(h,∥)| = 5.8. These results provide a quantitative estimate of the basic electronic and spin properties of NWs and may guide a theoretical analysis of the band structure of these fascinating nanostructures.
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Affiliation(s)
- Marta De Luca
- Dipartimento di Fisica and CNISM, Sapienza Università di Roma , Piazzale A. Moro 2, 00185 Roma, Italy
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Amaduzzi F, Bomboi F, Bonincontro A, Bordi F, Casciardi S, Chronopoulou L, Diociaiuti M, Mura F, Palocci C, Sennato S. Chitosan-DNA complexes: charge inversion and DNA condensation. Colloids Surf B Biointerfaces 2013; 114:1-10. [PMID: 24161501 DOI: 10.1016/j.colsurfb.2013.09.029] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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: 03/27/2013] [Revised: 08/21/2013] [Accepted: 09/14/2013] [Indexed: 10/26/2022]
Abstract
The design of biocompatible polyelectrolyte complexes is a promising strategy for in vivo delivery of biologically active macromolecules. Particularly, the condensation of DNA by polycations received considerable attention for its potential in gene delivery applications, where the development of safe and effective non-viral vectors remains a central challenge. Among polymeric polycations, Chitosan has recently emerged as a very interesting material for these applications. In this study, we compare the observed aggregation behavior of Chitosan-DNA complexes with the predictions of existing models for the complexation of oppositely charged polyelectrolytes. By using different and complementary microscopy approaches (AFM, FESEM and TEM), light scattering and electrophoretic mobility techniques, we characterized the structures of the complexes formed at different charge ratios and Chitosan molecular weight. In good agreement with theoretical predictions, a reentrant condensation, accompanied by charge inversion, is clearly observed as the polycation/DNA charge ratio is increased. In fact, the aggregates reach their maximum size in correspondence of a value of the charge ratio where their measured net charge inverts its sign. This value does not correspond to the stoichiometric 1:1 charge ratio, but is inversely correlated with the polycation length. Distinctive "tadpole-like" aggregates are observed in excess polycation, while only globular aggregates are found in excess DNA. Close to the isoelectric point, elongated fiber-like structures appear. Within the framework of the models discussed, different apparently uncorrelated observations reported in the literature find a systematic interpretation. These results suggest that these models are useful tools to guide the design of new and more efficient polycation-based vectors for a more effective delivery of genetic material.
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Affiliation(s)
- Francesca Amaduzzi
- Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy
| | - Francesca Bomboi
- Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy
| | - Adalberto Bonincontro
- Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy
| | - Federico Bordi
- Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy; CNR-IPCF UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy.
| | - Stefano Casciardi
- Dipartimento di Igiene del Lavoro, ISPESL, 00040 Monte Porzio Catone, Italy
| | - Laura Chronopoulou
- Dipartimento di Chimica, Sapienza Università di Roma, P.zzle A. Moro, 5, 00185 Roma, Italy
| | - Marco Diociaiuti
- Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, V.le Regina Elena 299, 00161 Roma, Italy
| | - Francesco Mura
- Dipartimento di Scienze di Base Applicate all'Ingegneria, Sapienza Università di Roma, Via A. Scarpa, 14, 00183 Roma, Italy
| | - Cleofe Palocci
- Dipartimento di Chimica, Sapienza Università di Roma, P.zzle A. Moro, 5, 00185 Roma, Italy
| | - Simona Sennato
- Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy; CNR-IPCF UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma, P.zzle A. Moro, 2, 00185 Roma, Italy
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Costantini F, Tiggelaar R, Sennato S, Mura F, Schlautmann S, Bordi F, Gardeniers H, Manetti C. Glucose level determination with a multi-enzymatic cascade reaction in a functionalized glass chip. Analyst 2013; 138:5019-24. [DOI: 10.1039/c3an00806a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fraison JB, Riviere S, Konate AP, Schiffmann A, Mura F, Le Quellec A. Uvéite intermédiaire corticorésistante : pensez à l’amylose. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.03.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pozio A, Cemmi A, Mura F, Masci A, Silva RF. Study on the Durability of Recast Nafion/Montmorillonite Composite Membranes in Low Humidification Conditions. International Journal of Electrochemistry 2011. [DOI: 10.4061/2011/252031] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nafion composite membranes were formed from a recasting procedure previously reported by the authors. Montmorillonite (MMT) was used as a filler in the recasting procedure, and dimethylformamide (DMF) was used as the casting solvent. Fuel cell tests performed with the recast membrane showed that at low relative humidity (R.H.) the conductivity of the MMT-containing membranes is 10% higher than that of the MMT-free samples. In order to investigate the durability of such composite perfluorosulfonate membranes, long-term fuel cell experiments have been carried out. Results evidenced a strong effect of low RH on the lifetime of commercial polymer membranes, but the addition of a small silicate amount to the polymeric membrane reduced strongly the membrane degradation.
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Affiliation(s)
- A. Pozio
- ENEA, Centro Ricerche Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy
| | - A. Cemmi
- ENEA, Centro Ricerche Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy
| | - F. Mura
- ENEA, Centro Ricerche Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy
| | - A. Masci
- ENEA, Centro Ricerche Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy
| | - R. F. Silva
- ENEA, Centro Ricerche Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy
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Pozio A, Cemmi A, Mura F, Masci A, Serra E, Silva RF. Long-term durability study of perfluoropolymer membranes in low humidification conditions. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1193-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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