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Venezia V, Prieto C, Verrillo M, Grumi M, Silvestri B, Vitiello G, Luciani G, Lagaron JM. Electrospun films incorporating humic substances of application interest in sustainable active food packaging. Int J Biol Macromol 2024; 263:130210. [PMID: 38365144 DOI: 10.1016/j.ijbiomac.2024.130210] [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: 12/01/2023] [Revised: 01/29/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
Sustainable active food packaging is essential to reduce the use of plastics, preserve food quality and minimize the environmental impact. Humic substances (HS) are rich in redox-active compounds, such as quinones, phenols, carboxyl, and hydroxyl moieties, making them functional additives for biopolymeric matrices, such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). Herein, composites made by incorporating different amounts of HS into PHBV were developed using the electrospinning technology and converted into homogeneous and continuous films by a thermal post-treatment to obtain a bioactive and biodegradable layer which could be part of a multilayer food packaging solution. The morphology, thermal, optical, mechanical, antioxidant and barrier properties of the resulting PHBV-based films have been evaluated, as well as the antifungal activity against Aspergillus flavus and Candida albicans and the antimicrobial properties against both Gram (+) and Gram (-) bacterial strains. HS show great potential as natural additives for biopolymer matrices, since they confer antioxidant, antimicrobial, and antifungal properties to the resulting materials. In addition, barrier, optical and mechanical properties highlighted that the obtained films are suitable for sustainable active packaging. Therefore, the electrospinning methodology is a promising and sustainable approach to give biowaste a new life through the development of multifunctional materials suitable in the active bio-packaging.
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Affiliation(s)
- Virginia Venezia
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy; DiSt, Department of Structures for Engineering and Architecture, University of Naples Federico II, Naples, Italy.
| | - Cristina Prieto
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Paterna, Spain
| | | | - Mattia Grumi
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Paterna, Spain
| | - Brigida Silvestri
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Italy
| | - Giuseppe Vitiello
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy; CSGI-Center for Colloid and Surface Science, Via Della Lastruccia 3, 50019 Florence, Italy
| | - Giuseppina Luciani
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy.
| | - Jose M Lagaron
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Paterna, Spain
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Pota G, Armanetti P, Silvestri B, de Gennaro B, Zanfardino A, Napoli MD, Varcamonti M, Landi G, Pezzella A, Costantini A, Luciani G, Menichetti L. Biosustainable Hybrid Nanoplatforms as Photoacoustic Agents. Macromol Biosci 2024:e2400013. [PMID: 38509742 DOI: 10.1002/mabi.202400013] [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: 01/12/2024] [Revised: 03/13/2024] [Indexed: 03/22/2024]
Abstract
The development of biosafe theranostic nanoplatforms has attracted great attention due to their multifunctional behavior, reduced potential toxicity, and improved long-term safety. When considering photoacoustic contrast agents and photothermal conversion tools, melanin and constructs like melanin are highly appealing due to their ability to absorb optical energy and convert it into heat. Following a sustainable approach, in this study, silver-melanin like-silica nanoplatforms are synthesized exploiting different bio-available and inexpensive phenolic acids as potential melanogenic precursors and exploring their role in tuning the final systems architecture. The UV-Vis combined with X-Ray Diffraction investigation proves metallic silver formation, while Transmission Electron Microscopy analysis reveals that different morphologies can be obtained by properly selecting the phenolic precursors. By looking at the characterization results, a tentative formation mechanism is proposed to explain how phenolic precursors' redox behavior may affect the nanoplatforms' structure. The antibacterial activity experiments showed that all synthesized systems have a strong inhibitory effect on Escherichia coli, even at low concentrations. Furthermore, very sensitive Photoacoustic Imaging capabilities and significant photothermal behavior under laser irradiation are exhibited. Finally, a marked influence of phenol nature on the final system architecture is revealed resulting in a significant effect on both biological and photoacoustic features of the obtained systems. These melanin-based hybrid systems exhibit excellent potential as triggerable nanoplatforms for various biomedical applications.
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Affiliation(s)
- Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V.Tecchio, 80, Naples, NA, 80125, Italy
| | - Paolo Armanetti
- Institute of Clinical Physiology, National Research Council, indirizzo Via G.Moruzzi 1, Pisa, 56124, Italy
| | - Brigida Silvestri
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio, 21, Naples, NA, 80125, Italy
| | - Bruno de Gennaro
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V.Tecchio, 80, Naples, NA, 80125, Italy
| | - Anna Zanfardino
- Department of Biology, University of Naples Federico II, Via Vicinale Cupa Cintia, 21, Naples, 80126, Italy
| | - Michela Di Napoli
- Department of Biology, University of Naples Federico II, Via Vicinale Cupa Cintia, 21, Naples, 80126, Italy
| | - Mario Varcamonti
- Department of Biology, University of Naples Federico II, Via Vicinale Cupa Cintia, 21, Naples, 80126, Italy
| | - Gianluca Landi
- Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili STEMS-CNR, Via Guglielmo Marconi, 4, Naples, 80125, Italy
| | - Alessandro Pezzella
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti, 9, Florence, 50121, Italy
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR, Via Campi Flegrei, 34, Pozzuoli, NA, 80078, Italy
- Department of Physics Ettore Pancini, University of Naples Federico II, Via Vicinale Cupa Cintia, 21, Naples, 80126, Italy
| | - Aniello Costantini
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V.Tecchio, 80, Naples, NA, 80125, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V.Tecchio, 80, Naples, NA, 80125, Italy
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, indirizzo Via G.Moruzzi 1, Pisa, 56124, Italy
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3
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Carrese B, Cavallini C, Armanetti P, Silvestri B, Calì G, Luciani G, Sanità G, Menichetti L, Lamberti A. Hybrid Nanoparticle-Assisted Chemo-Photothermal Therapy and Photoacoustic Imaging in a Three-Dimensional Breast Cancer Cell Model. Int J Mol Sci 2023; 24:17374. [PMID: 38139203 PMCID: PMC10743567 DOI: 10.3390/ijms242417374] [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: 11/01/2023] [Revised: 11/29/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Bioinspired nanoparticles have recently been gaining attention as promising multifunctional nanoplatforms for therapeutic applications in cancer, including breast cancer. Here, the efficiency of the chemo-photothermal and photoacoustic properties of hybrid albumin-modified nanoparticles (HSA-NPs) loaded with doxorubicin was evaluated in a three-dimensional breast cancer cell model. The HSA-NPs showed a higher uptake and deeper penetration into breast cancer spheroids than healthy breast cell 3D cultures. Confocal microscopy revealed that, in tumour spheroids incubated with doxorubicin-loaded NPs for 16 h, doxorubicin was mainly localised in the cytoplasm, while a strong signal was detectable at the nuclear level after 24 h, suggesting a time-dependent uptake. To evaluate the cytotoxicity of doxorubicin-loaded NPs, tumour spheroids were treated for up to 96 h with increasing concentrations of NPs, showing marked toxicity only at the highest concentration of doxorubicin. When doxorubicin administration was combined with laser photothermal irradiation, enhanced cytotoxicity was observed at lower concentrations and incubation times. Finally, the photoacoustic properties of doxorubicin-loaded NPs were evaluated in tumour spheroids, showing a detectable signal increasing with NP concentration. Overall, our data show that the combined effect of chemo-photothermal therapy results in a shorter exposure time to doxorubicin and a lower drug dose. Furthermore, owing to the photoacoustic properties of the NPs, this nanoplatform may represent a good candidate for theranostic applications.
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Affiliation(s)
- Barbara Carrese
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy
| | - Chiara Cavallini
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy
| | - Paolo Armanetti
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy
| | - Brigida Silvestri
- Department of Civil, Construction and Environmental Engineering, University of Naples Federico II, 80125 Naples, Italy
| | - Gaetano Calì
- Institute of Endocrinology and Molecular Oncology, National Research Council, 80131 Naples, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy
| | - Gennaro Sanità
- Institute of Applied Sciences and Intelligent Systems—Unit of Naples, National Research Council, 80131 Naples, Italy
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy
| | - Annalisa Lamberti
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy
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4
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Silvestri B, Armanetti P, Pota G, Vitiello G, Pezzella A, Menichetti L, Giannini V, Luciani G. Enhanced Photoacoustic Response by Synergistic Ag-Melanin Interplay at the Core of Ternary Biocompatible Hybrid Silica-Based Nanoparticles. ACS Appl Mater Interfaces 2023; 15:46756-46764. [PMID: 37774145 PMCID: PMC10571004 DOI: 10.1021/acsami.3c13523] [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] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 09/18/2023] [Indexed: 10/01/2023]
Abstract
Photoacoustics (PA) is gaining increasing credit among biomolecular imaging methodologies by virtue of its poor invasiveness, deep penetration, high spatial resolution, and excellent endogenous contrast, without the use of any ionizing radiation. Recently, we disclosed the excellent PA response of a self-structured biocompatible nanoprobe, consisting of ternary hybrid nanoparticles with a silver core and a melanin component embedded into a silica matrix. Although preliminary evidence suggested a crucial role of the Ag sonophore and the melanin-containing nanoenvironment, whether and in what manner the PA response is controlled and affected by the self-structured hybrid nanosystems remained unclear. Because of their potential as multifunctional platforms for biomedical applications, a detailed investigation of the metal-polymer-matrix interplay underlying the PA response was undertaken to understand the physical and chemical factors determining the enhanced response and to optimize the architecture, composition, and performance of the nanoparticles for efficient imaging applications. Herein, we provide the evidence for a strong synergistic interaction between eumelanin and Ag which suggests an important role in the in situ-generated metal-organic interface. In particular, we show that a strict ratio between melanin and silver precursors and an accurate choice of metal nanoparticle dimension and the kind of metal are essential for achieving strong enhancements of the PA response. Systematic variation of the metal/melanin component is thus shown to offer the means of tuning the stability and intensity of the photoacoustic response for various biomedical and theranostic applications.
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Affiliation(s)
- Brigida Silvestri
- Department
of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125 Fuorigrotta, Naples, Italy
| | - Paolo Armanetti
- Institute
of Clinical Physiology, National Research Council, Via Giuseppe Moruzzi 1, 56124 Pisa, Italy
| | - Giulio Pota
- Department
of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy
| | - Giuseppe Vitiello
- Department
of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy
- CSGI,
Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande
Interfase, Sesto Fiorentino, via della Lastruccia 3, 50019 Firenze, Italy
| | - Alessandro Pezzella
- National
Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Florence, Italy
- Institute
for Polymers, Composites and Biomaterials (IPCB), CNR, Via Campi Flegrei 34, I-80078 Pozzuoli (NA), Italy
- Department
of Physics Ettore Pancini, University of
Naples “Federico II” Via Cintia 4, I-80126 Naples, Italy
| | - Luca Menichetti
- Institute
of Clinical Physiology, National Research Council, Via Giuseppe Moruzzi 1, 56124 Pisa, Italy
| | - Vincenzo Giannini
- Instituto
de Estructura de la Materia (IEM), Consejo Superior de Investigaciones
Científicas (CSIC), Serrano 121, Madrid 28006, Spain
- Technology
Innovation Institute, Building B04C, P.O. Box, Abu Dhabi 9639, United Arab Emirates
| | - Giuseppina Luciani
- Department
of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy
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5
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Pota G, Silvestri B, Vitiello G, Gallucci N, Di Girolamo R, Scialla S, Raucci MG, Ambrosio L, Di Napoli M, Zanfardino A, Varcamonti M, Pezzella A, Luciani G. Towards nanostructured red-ox active bio-interfaces: Bioinspired antibacterial hybrid melanin-CeO 2 nanoparticles for radical homeostasis. Biomater Adv 2023; 153:213558. [PMID: 37467646 DOI: 10.1016/j.bioadv.2023.213558] [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] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 05/29/2023] [Accepted: 07/08/2023] [Indexed: 07/21/2023]
Abstract
Redox-active nano-biointerfaces are gaining weight in the field of regenerative medicine since they can act as enzymes in regulating physiological processes and enabling cell homeostasis, as well as the defense against pathogen aggression. In particular, cerium oxide nanoparticles (CeO2 NPs) stand as intriguing enzyme-mimicking nanoplatforms, owing to the reversible Ce+3/Ce+4 surface oxidation state. Moreover, surface functionalization leads to higher catalytic activity and selectivity, as well as more tunable enzyme-mimicking performances. Conjugation with melanin is an adequate strategy to boost and enrich CeO2 NPs biological features, because of melanin redox properties accounting for intrinsic antioxidant, antimicrobial and anti-inflammatory power. Herein, hybrid Melanin/CeO2 nanostructures were designed by simply coating the metal-oxide nanoparticles with melanin chains, obtained in-situ through ligand-to-metal charge transfer mechanism, according to a bioinspired approach. Obtained hybrid nanostructures underwent detailed physico-chemical characterization. Morphological and textural features were investigated through TEM, XRD and N2 physisorption. The nature of nanoparticle-melanin interaction was analyzed through FTIR, UV-vis and EPR spectroscopy. Melanin-coated hybrid nanostructures exhibited a relevant antioxidant activity, confirmed by a powerful quenching effect for DPPH radical, reaching 81 % inhibition at 33 μg/mL. A promising anti-inflammatory efficacy of the melanin-coated hybrid nanostructures was validated through a significant inhibition of BSA denaturation after 3 h. Meanwhile, the enzyme-mimicking activity was corroborated by a prolonged peroxidase activity after 8 h at 100 μg/mL and a relevant catalase-like action, by halving the H2O2 level in 30 min at 50 μg/mL. Antimicrobial assays attested that conjugation with melanin dramatically boosted CeO2 biocide activity against both Gram (-) and Gram (+) strains. Cytocompatibility tests demonstrated that the melanin coating not only enhanced the CeO2 nanostructures biomimicry, resulting in improved cell viability for human dermal fibroblast cells (HDFs), but mostly they proved that Melanin-CeO2 NPs were able to control the oxidative stress, modulating the production of nitrite and reactive oxygen species (ROS) levels in HDFs, under physiological conditions. Such remarkable outcomes make hybrid melanin-CeO2 nanozymes, promising redox-active interfaces for regenerative medicine.
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Affiliation(s)
- Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
| | - Brigida Silvestri
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy; CSGI, Center for Colloid and Surface Science, via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy
| | - Noemi Gallucci
- Department of Chemical Sciences, University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy
| | - Rocco Di Girolamo
- Department of Chemical Sciences, University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy
| | - Stefania Scialla
- Institute for Polymers Composites and Biomaterials (IPCB) CNR Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy
| | - Maria Grazia Raucci
- Institute for Polymers Composites and Biomaterials (IPCB) CNR Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy
| | - Luigi Ambrosio
- Institute for Polymers Composites and Biomaterials (IPCB) CNR Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy
| | - Michela Di Napoli
- Department of Biology, University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy
| | - Anna Zanfardino
- Department of Biology, University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy
| | - Mario Varcamonti
- Department of Biology, University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy
| | - Alessandro Pezzella
- Institute for Polymers Composites and Biomaterials (IPCB) CNR Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy; Department of Physics "Ettore Pancini", University of Naples Federico II Via Cinthia 4, 80126 Naples, Italy; National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti, 9, 50121 Florence, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy.
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Venezia V, Verrillo M, Avallone PR, Silvestri B, Cangemi S, Pasquino R, Grizzuti N, Spaccini R, Luciani G. Waste to Wealth Approach: Improved Antimicrobial Properties in Bioactive Hydrogels through Humic Substance-Gelatin Chemical Conjugation. Biomacromolecules 2023. [PMID: 37167573 DOI: 10.1021/acs.biomac.3c00143] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Exploring opportunities for biowaste valorization, herein, humic substances (HS) were combined with gelatin, a hydrophilic biocompatible and bioavailable polymer, to obtain 3D hydrogels. Hybrid gels (Gel HS) were prepared at different HS contents, exploiting physical or chemical cross-linking, through 1-ethyl-(3-3-dimethylaminopropyl)carbodiimide (EDC) chemistry, between HS and gelatin. Physicochemical features were assessed through rheological measurements, X-ray diffraction, attenuated total reflectance (ATR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, and scanning electron microscopy (SEM). ATR and NMR spectroscopies suggested the formation of an amide bond between HS and Gel via EDC chemistry. In addition, antioxidant and antimicrobial features toward both Gram(-) and Gram(+) strains were evaluated. HS confers great antioxidant and widespread antibiotic performance to the whole gel. Furthermore, the chemical cross-linking affects the viscoelastic behavior, crystalline structures, water uptake, and functional performance and produces a marked improvement of biocide action.
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Affiliation(s)
- Virginia Venezia
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
- DiSt, Department of Structures for Engineering and Architecture, University of Naples Federico II, Naples 80125, Italy
| | - Mariavittoria Verrillo
- Department of Agricultural Science, University of Naples Federico II, Portici 80125, Italy
| | - Pietro Renato Avallone
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
| | - Brigida Silvestri
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples 80125, Italy
| | - Silvana Cangemi
- Department of Agricultural Science, University of Naples Federico II, Portici 80125, Italy
| | - Rossana Pasquino
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
| | - Nino Grizzuti
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
| | - Riccardo Spaccini
- Department of Agricultural Science, University of Naples Federico II, Portici 80125, Italy
| | - Giuseppina Luciani
- DICMaPI, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
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Di Napoli M, Silvestri B, Castagliuolo G, Carpentieri A, Luciani G, Di Maro A, Sorbo S, Pezzella A, Zanfardino A, Varcamonti M. High density polyethylene (HDPE) biodegradation by the fungus Cladosporium halotolerans. FEMS Microbiol Ecol 2023; 99:6881716. [PMID: 36478021 DOI: 10.1093/femsec/fiac148] [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: 06/20/2022] [Revised: 11/29/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022] Open
Abstract
Polyethylene (PE) is high molecular weight synthetic polymer, very hydrofobic and hardly biodegradable. To increase polyethylene bio-degradability it is very important to find microorganisms that improve the PE hydrophilic level and/or reduce the length of its polymeric chain by oxidation. In this study, we isolated Cladosporium halotolerans, a fungal species, from the gastric system of Galleria mellonella larvae. Here, we show that C. halotolerans grows in the presence of PE polymer, it is able to interact with plastic material through its hyphae and secretes enzymes involved in PE degradation.
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Affiliation(s)
- Michela Di Napoli
- Department of Biology, University of Naples Federico II, Via Cintia, 80126 Naples, Italy
| | - Brigida Silvestri
- Department of Chemical, University of Naples Federico II, Materials and Production Engineering, Via Cintia, 80126 Naples, Italy
| | - Giusy Castagliuolo
- Department of Biology, University of Naples Federico II, Via Cintia, 80126 Naples, Italy
| | - Andrea Carpentieri
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia, 80126 Naples, Italy
| | - Giuseppina Luciani
- Department of Chemical, University of Naples Federico II, Materials and Production Engineering, Via Cintia, 80126 Naples, Italy
| | - Antimo Di Maro
- Department of Environmental, University of Campania 'Luigi Vanvitelli', Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Via Vivaldi, 81100 Caserta, Italy
| | - Sergio Sorbo
- University of Naples Federico II, CeSMA, Via Cintia, 80126 Naples, Italy
| | - Alessandro Pezzella
- Department of Physics "Ettore Pancini", University of Naples Federico II, Via Cintia, 80126 Naples, Italy
| | - Anna Zanfardino
- Department of Biology, University of Naples Federico II, Via Cintia, 80126 Naples, Italy
| | - Mario Varcamonti
- Department of Biology, University of Naples Federico II, Via Cintia, 80126 Naples, Italy
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8
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Pota G, Vitiello G, Venezia V, Della Sala F, Borzacchiello A, Costantini A, Paduano L, Cavalcanti LP, Tescione F, Silvestri B, Luciani G. Shall We Tune? From Core-Shell to Cloud Type Nanostructures in Heparin/Silica Hybrids. Polymers (Basel) 2022; 14:polym14173568. [PMID: 36080642 PMCID: PMC9460005 DOI: 10.3390/polym14173568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/17/2022] [Accepted: 08/25/2022] [Indexed: 11/26/2022] Open
Abstract
Heparin plays multiple biological roles depending on the availability of active sites strongly influenced by the conformation and the structure of polysaccharide chains. Combining different components at the molecular scale offers an extraordinary chance to easily tune the structural organization of heparin required for exploring new potential applications. In fact, the combination of different material types leads to challenges that cannot be achieved by each single component. In this study, hybrid heparin/silica nanoparticles were synthesized, and the role of silica as a templating agent for heparin supramolecular organization was investigated. The effect of synthesis parameters on particles compositions was deeply investigated by Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA). Transmission Electron Microscopy (TEM) reveals a different supramolecular organization of both components, leading to amazing organic-inorganic nanoparticles with different behavior in drug encapsulation and release. Furthermore, favorable biocompatibility for healthy human dermal fibroblasts (HDF) and tumor HS578T cells has been assessed, and a different biological behavior was observed, ascribed to different surface charge and morphology of synthesized nanoparticles.
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Affiliation(s)
- Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Virginia Venezia
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Francesca Della Sala
- Institute of Polymers, Composites and Biomaterials, National Research Council, (IPCB-CNR), 80125 Naples, Italy
| | - Assunta Borzacchiello
- Institute of Polymers, Composites and Biomaterials, National Research Council, (IPCB-CNR), 80125 Naples, Italy
| | - Aniello Costantini
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Luigi Paduano
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, 80126 Naples, Italy
| | | | - Fabiana Tescione
- Institute of Polymers, Composites and Biomaterials, National Research Council, (IPCB-CNR), 80125 Naples, Italy
| | - Brigida Silvestri
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy
- Correspondence: ; Tel.: +39-081-7682413
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
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9
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Pota G, Sapienza Salerno A, Costantini A, Silvestri B, Passaro J, Califano V. Co-immobilization of Cellulase and β-Glucosidase into Mesoporous Silica Nanoparticles for the Hydrolysis of Cellulose Extracted from Eriobotrya japonica Leaves. Langmuir 2022; 38:5481-5493. [PMID: 35476419 PMCID: PMC9097537 DOI: 10.1021/acs.langmuir.2c00053] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Fungal cellulases generally contain a reduced amount of β-glucosidase (BG), which does not allow for efficient cellulose hydrolysis. To address this issue, we implemented an easy co-immobilization procedure of β-glucosidase and cellulase by adsorption on wrinkled mesoporous silica nanoparticles with radial and hierarchical open pore structures, exhibiting smaller (WSN) and larger (WSN-p) inter-wrinkle distances. The immobilization was carried out separately on different vectors (WSN for BG and WSN-p for cellulase), simultaneously on the same vector (WSN-p), and sequentially on the same vector (WSN-p) in order to optimize the synergy between cellulase and BG. The obtained results pointed out that the best biocatalyst is that prepared through simultaneous immobilization of BG and cellulase on the same vector (WSN-p). In this case, the adsorption resulted in 20% yield of immobilization, corresponding to an enzyme loading of 100 mg/g of support. 82% yield of reaction and 72 μmol/min·g activity were obtained, evaluated for the hydrolysis of cellulose extracted from Eriobotrya japonica leaves. All reactions were carried out at a standard temperature of 50 °C. The biocatalyst retained 83% of the initial yield of reaction after 9 cycles of reuse. Moreover, it had better stability than the free enzyme mixture in a wide range of temperatures, preserving 72% of the initial yield of reaction up to 90 °C.
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Affiliation(s)
- Giulio Pota
- Department
of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Antonio Sapienza Salerno
- Department
of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Aniello Costantini
- Department
of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Brigida Silvestri
- Department
of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Jessica Passaro
- Department
of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Valeria Califano
- Institute
of Science and Technology for Sustainable Energy and Mobility (STEMS), National Research Council of Italy (CNR), Viale Marconi 4, 80125 Naples, Italy
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10
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Venezia V, Pota G, Silvestri B, Vitiello G, Di Donato P, Landi G, Mollo V, Verrillo M, Cangemi S, Piccolo A, Luciani G. A study on structural evolution of hybrid humic Acids-SiO 2 nanostructures in pure water: Effects on physico-chemical and functional properties. Chemosphere 2022; 287:131985. [PMID: 34454229 DOI: 10.1016/j.chemosphere.2021.131985] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 08/20/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
Humic acids (HA) are considered a promising and inexpensive source for novel multifunctional materials for a huge range of applications. However, aggregation and degradation phenomena in aqueous environment prevent from their full exploitation. A valid strategy to address these issues relies on combining HA moieties at the molecular scale with an inorganic nanostructured component, leading to more stable hybrid nanomaterials with tunable functionalities. Indeed, chemical composition of HA can determine their interactions with the inorganic constituent in the hybrid nanoparticles and consequently affect their overall physico-chemical properties, including their stability and functional properties in aqueous environment. As a fundamental contribution to HA materials-based technology, this study aims at unveiling this aspect. To this purpose, SiO2 nanoparticles have been chosen as a model platform and three different HAs extracted from composted biomasses, manure (HA_Man), artichoke residues (HA_Art) and coffee grounds (HA_Cof), were employed to synthetize hybrid HA-SiO2 nanoparticles through in-situ sol-gel synthesis. Prepared samples were submitted to aging in water to assess their stability. Furthermore, antioxidant properties and physico-chemical properties of both as prepared and aged samples in aqueous environment were assessed through Scanning Electron Microscopy (SEM), N2 physisorption, Simultaneous Thermogravimetric (TGA) and Differential Scanning Calorimetric (DSC) Analysis, Fourier Transform Infrared (FT-IR), Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR) spectroscopies. The experimental results highlighted that hybrid HA-SiO2 nanostructures acted as dynamic systems which exhibit structural supramolecular reorganization during aging in aqueous environment with marked effects on physico-chemical and functional properties, including improved antioxidant activity. Obtained results enlighten a unique aspect of interactions between HA and inorganic nanoparticles that could be useful to predict their behavior in aqueous environment. Furthermore, the proposed approach traces a technological route for the exploitation of organic biowaste in the design of hybrid nanomaterials, providing a significant contribution to the development of waste to wealth strategies based on humic substances.
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Affiliation(s)
- Virginia Venezia
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125, Naples, Italy.
| | - Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125, Naples, Italy.
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125, Naples, Italy.
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125, Naples, Italy; CSGI, Center for Colloids and Surface Science, via della Lastruccia 3, 50019, Florence, Italy.
| | - Paola Di Donato
- Department of Science and Technology, University of Naples "Parthenope", Centro Direzionale Isola C4, 80143, Naples, Italy.
| | - Gianluca Landi
- Institute of Sciences and Technologies for Sustainable Energy and Mobility-CNR, P.le V. Tecchio 80, 80125, Naples, Italy.
| | - Valentina Mollo
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia@CABHC, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.
| | - Mariavittoria Verrillo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare ed i Nuovi Materiali (CERMANU), University of Naples "Federico II", Via Università 100, 80055, Portici, Italy.
| | - Silvana Cangemi
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare ed i Nuovi Materiali (CERMANU), University of Naples "Federico II", Via Università 100, 80055, Portici, Italy.
| | - Alessandro Piccolo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare ed i Nuovi Materiali (CERMANU), University of Naples "Federico II", Via Università 100, 80055, Portici, Italy.
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125, Naples, Italy.
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11
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Venezia V, Avallone PR, Vitiello G, Silvestri B, Grizzuti N, Pasquino R, Luciani G. Adding Humic Acids to Gelatin Hydrogels: A Way to Tune Gelation. Biomacromolecules 2021; 23:443-453. [PMID: 34936338 PMCID: PMC8753605 DOI: 10.1021/acs.biomac.1c01398] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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] [Indexed: 11/28/2022]
Abstract
Exploring the chance to convert biowaste into a valuable resource, this study tests the potential role of humic acids (HA), a class of multifunctional compounds obtained by oxidative decomposition of biomass, as physical agents to improve gelatin's mechanical and thermal properties. To this purpose, gelatin-HA aqueous samples were prepared at increasing HA content. HA/gelatin concentrations changed in the range 2.67-26.67 (wt/wt)%. Multiple techniques were employed to assess the influence of HA content on the gel properties and to unveil the underlying mechanisms. HAs increased gel strength up to a concentration of 13.33 (wt/wt)% and led to a weaker gel at higher concentrations. FT-IR and DSC results proved that HAs can establish noncovalent interactions through H-bonding with gelatin. Coagulation phenomena occur because of HA-gelatin interactions, and at concentrations greater than 13.33 (wt/wt)%, HAs established preferential bonds with water molecules, preventing them from coordinating with gelatin chains. These features were accompanied by a change in the secondary structure of gelatin, which lost the triple helix structure and exhibited an increase in the random coil conformation. Besides, higher HA weight content caused swelling phenomena due to HA water absorption, contributing to a weaker gel. The current findings may be useful to enable a better control of gelatin structures modified with composted biowaste, extending their exploitation for a large set of technological applications.
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Affiliation(s)
- Virginia Venezia
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Pietro Renato Avallone
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Giuseppe Vitiello
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Brigida Silvestri
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Nino Grizzuti
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Rossana Pasquino
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
| | - Giuseppina Luciani
- DICMaPI, Università degli Studi di Napoli Federico II, P.le Tecchio 80, 80125 Napoli, Italy
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12
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Carrese B, Cavallini C, Sanità G, Armanetti P, Silvestri B, Calì G, Pota G, Luciani G, Menichetti L, Lamberti A. Controlled Release of Doxorubicin for Targeted Chemo-Photothermal Therapy in Breast Cancer HS578T Cells Using Albumin Modified Hybrid Nanocarriers. Int J Mol Sci 2021; 22:ijms222011228. [PMID: 34681890 PMCID: PMC8538307 DOI: 10.3390/ijms222011228] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/14/2021] [Accepted: 10/14/2021] [Indexed: 12/16/2022] Open
Abstract
Hybrid nanomaterials have attracted research interest owing to their intriguing properties, which may offer new diagnostic options with triggering features, able to realize a new kind of tunable nanotherapeutics. Hybrid silica/melanin nanoparticles (NPs) containing silver seeds (Me-laSil_Ag-HSA NPs) disclosed relevant photoacoustic contrast for molecular imaging. In this study we explored therapeutic function in the same nanoplatform. For this purpose, MelaSil_Ag-HSA were loaded with doxorubicin (DOX) (MelaSil_Ag-HSA@DOX) and tested to assess the efficiency of drug delivery combined with concurrent photothermal treatment. The excellent photothermal properties allowed enhanced cytotoxic activity at significantly lower doses than neat chemotherapeutic treatment. The results revealed that MelaSil_Ag-HSA@DOX is a promising platform for an integrated photothermal (PT) chemotherapy approach, reducing the efficacy concentration of the DOX and, thus, potentially limiting the several adverse side effects of the drug in in vivo treatments.
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Affiliation(s)
- Barbara Carrese
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy;
| | - Chiara Cavallini
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy; (C.C.); (P.A.)
| | - Gennaro Sanità
- Institute of Applied Sciences and Intelligent Systems, National Research Council, 80078 Naples, Italy;
| | - Paolo Armanetti
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy; (C.C.); (P.A.)
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy; (B.S.); (G.P.); (G.L.)
| | - Gaetano Calì
- Institute of Endocrinology and Experimental Oncology, National Research Council, 80131 Naples, Italy;
| | - Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy; (B.S.); (G.P.); (G.L.)
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy; (B.S.); (G.P.); (G.L.)
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy; (C.C.); (P.A.)
- Correspondence: (L.M.); (A.L.)
| | - Annalisa Lamberti
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy;
- Correspondence: (L.M.); (A.L.)
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13
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Cavallini C, Vitiello G, Adinolfi B, Silvestri B, Armanetti P, Manini P, Pezzella A, d’Ischia M, Luciani G, Menichetti L. Melanin and Melanin-Like Hybrid Materials in Regenerative Medicine. Nanomaterials (Basel) 2020; 10:E1518. [PMID: 32756369 PMCID: PMC7466405 DOI: 10.3390/nano10081518] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [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: 06/27/2020] [Revised: 07/21/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023]
Abstract
Melanins are a group of dark insoluble pigments found widespread in nature. In mammals, the brown-black eumelanins and the reddish-yellow pheomelanins are the main determinants of skin, hair, and eye pigmentation and play a significant role in photoprotection as well as in many biological functions ensuring homeostasis. Due to their broad-spectrum light absorption, radical scavenging, electric conductivity, and paramagnetic behavior, eumelanins are widely studied in the biomedical field. The continuing advancements in the development of biomimetic design strategies offer novel opportunities toward specifically engineered multifunctional biomaterials for regenerative medicine. Melanin and melanin-like coatings have been shown to increase cell attachment and proliferation on different substrates and to promote and ameliorate skin, bone, and nerve defect healing in several in vivo models. Herein, the state of the art and future perspectives of melanins as promising bioinspired platforms for natural regeneration processes are highlighted and discussed.
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Affiliation(s)
- Chiara Cavallini
- Institute of Clinical Physiology, National Research Council, via Giuseppe Moruzzi 1, 56124 Pisa, Italy; (P.A.); (L.M.)
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering (DICMaPI), University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Napoli, Italy; (G.V.); (B.S.)
| | - Barbara Adinolfi
- Institute of Applied Physics “Nello Carrara”, National Research Council, via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy;
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering (DICMaPI), University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Napoli, Italy; (G.V.); (B.S.)
| | - Paolo Armanetti
- Institute of Clinical Physiology, National Research Council, via Giuseppe Moruzzi 1, 56124 Pisa, Italy; (P.A.); (L.M.)
| | - Paola Manini
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, I-80126 Napoli, Italy; (P.M.); (A.P.); (M.d.)
| | - Alessandro Pezzella
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, I-80126 Napoli, Italy; (P.M.); (A.P.); (M.d.)
| | - Marco d’Ischia
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, I-80126 Napoli, Italy; (P.M.); (A.P.); (M.d.)
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering (DICMaPI), University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Napoli, Italy; (G.V.); (B.S.)
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, via Giuseppe Moruzzi 1, 56124 Pisa, Italy; (P.A.); (L.M.)
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14
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Sanità G, Armanetti P, Silvestri B, Carrese B, Calì G, Pota G, Pezzella A, d’Ischia M, Luciani G, Menichetti L, Lamberti A. Albumin-Modified Melanin-Silica Hybrid Nanoparticles Target Breast Cancer Cells via a SPARC-Dependent Mechanism. Front Bioeng Biotechnol 2020; 8:765. [PMID: 32733871 PMCID: PMC7360861 DOI: 10.3389/fbioe.2020.00765] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 05/06/2020] [Accepted: 06/16/2020] [Indexed: 12/18/2022] Open
Abstract
Bioconjugation of a recently developed photoacoustic nanoprobe, based on silica-templated eumelanin-silver hybrid nanoparticles (MelaSil_Ag-NPs), with human serum albumin (HSA) is disclosed herein as an efficient and practical strategy to improve photostability and to perform SPARC mediated internalization in breast cancer cells. Modification of NPs with HSA induced a slight viability decrease in breast cancer cells (HS578T) and normal breast cells (MCF10a) when incubated with HSA-NPs up to 100 μg/mL concentration for 72 h and a complete suppression of hemotoxicity for long incubation times. Uptake experiments with MelaSil_Ag-HSA NPs indicated very high and selective internalization via SPARC in HS578T (SPARC positive cells) but not in MCF10a (SPARC negative cells), as evaluated by using endocytosis inhibitors. The binding of SPARC to HSA was confirmed by Co-IP and Dot-blot assays. Additional studies were performed to analyze the interaction of MelaSil_Ag-HSA NPs with protein corona. Data showed a dramatic diminution of interacting proteins in HSA conjugated NPs compared to bare NPs. HSA-coated MelaSil_Ag-NPs are thus disclosed as a novel functional nanohybrid for potential photoacoustic imaging applications.
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Affiliation(s)
- Gennaro Sanità
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Paolo Armanetti
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Naples, Italy
| | - Barbara Carrese
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Gaetano Calì
- Institute of Endocrinology and Molecular Oncology, National Research Council, Naples, Italy
| | - Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Naples, Italy
| | - Alessandro Pezzella
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Marco d’Ischia
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Naples, Italy
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Annalisa Lamberti
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
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15
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Guerritore M, Castaldo R, Silvestri B, Avolio R, Cocca M, Errico ME, Avella M, Gentile G, Ambrogi V. Hyper-Crosslinked Polymer Nanocomposites Containing Mesoporous Silica Nanoparticles with Enhanced Adsorption Towards Polar Dyes. Polymers (Basel) 2020; 12:E1388. [PMID: 32575792 PMCID: PMC7362258 DOI: 10.3390/polym12061388] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/16/2020] [Accepted: 06/19/2020] [Indexed: 01/16/2023] Open
Abstract
The development of new styrene-based hyper-crosslinked nanocomposites (HCLN) containing mesoporous silica nanoparticles (MSN) is reported here as a new strategy to obtain functional high surface area materials with an enhanced hydrophilic character. The HCLN composition, morphology and porous structure were analyzed using a multi-technique approach. The HCLN displayed a high surface area (above 1600 m2/g) and higher microporosity than the corresponding hyper-crosslinked neat resin. The enhanced adsorption properties of the HCLN towards polar organic dyes was demonstrated through the adsorption of a reactive dye, Remazol Brilliant Blue R (RB). In particular, the HCLN containing 5phr MSN showed the highest adsorption capacity of RB.
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Affiliation(s)
- Marco Guerritore
- Department of Chemical, Materials and Production Engineering (DICMaPI)—University of Naples Federico II, P. le Tecchio 80, 80125 Napoli, Italy; (M.G.); (V.A.)
| | - Rachele Castaldo
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering (DICMaPI)—University of Naples Federico II, P. le Tecchio 80, 80125 Napoli, Italy; (M.G.); (V.A.)
| | - Roberto Avolio
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Mariacristina Cocca
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Maria Emanuela Errico
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Maurizio Avella
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Gennaro Gentile
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
| | - Veronica Ambrogi
- Department of Chemical, Materials and Production Engineering (DICMaPI)—University of Naples Federico II, P. le Tecchio 80, 80125 Napoli, Italy; (M.G.); (V.A.)
- National Research Council of Italy, Institute for Polymers Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; (R.A.); (M.C.); (M.E.E.); (M.A.); (G.G.)
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16
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Pota G, Venezia V, Vitiello G, Di Donato P, Mollo V, Costantini A, Avossa J, Nuzzo A, Piccolo A, Silvestri B, Luciani G. Tuning Functional Behavior of Humic Acids through Interactions with Stöber Silica Nanoparticles. Polymers (Basel) 2020; 12:E982. [PMID: 32340165 PMCID: PMC7240412 DOI: 10.3390/polym12040982] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 04/04/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 11/16/2022] Open
Abstract
Humic acids (HA) exhibit fascinating multifunctional features, yet degradation phenomena as well as poor stability in aqueous environments strongly limit their use. Inorganic nanoparticles are emerging as a powerful interface for the development of robust HA bio-hybrid materials with enhanced chemical stability and tunable properties. Hybrid organic-inorganic SiO2/HA nanostructures were synthesized via an in-situ sol-gel route, exploiting both physical entrapment and chemical coupling. The latter was achieved through amide bond formation between carboxyl groups of HA and the amino group of 3-aminopropyltriethoxysilane (APTS), as confirmed by Fourier-Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. Monodisperse hybrid nanoparticles about 90 nm in diameter were obtained in both cases, yet Electron Paramagnetic Resonance (EPR) spectroscopy highlighted the different supramolecular organization of HA. The altered HA conformation was reflected in different antioxidant properties of the conjugated nanoparticles that, however, resulted in being higher than for pure HA. Our findings proved the key role of both components in defining the morphology of the final system, as well as the efficacy of the ceramic component in templating the HA supramolecular organization and consequently tuning their functional features, thus defining a green strategy for bio-waste valorization.
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Affiliation(s)
- Giulio Pota
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
| | - Virginia Venezia
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
- CSGI, Center for Colloids and Surface Science, via della Lastruccia 3, 50019 Florence, Italy
| | - Paola Di Donato
- Department of Science and Technology, University of Naples “Parthenope”, Centro Direzionale Isola C4, 80143 Naples, Italy;
| | - Valentina Mollo
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia@CABHC, Largo Barsanti e Matteucci 53, 80125 Naples, Italy;
| | - Aniello Costantini
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
| | - Joshua Avossa
- Laboratory for Biomimetic Membranes and Textiles, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland;
| | - Assunta Nuzzo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l’Ambiente, l’Agroalimentare ed i Nuovi Materiali (CERMANU), University of Naples “Federico II”, Via Università 100, 80055 Portici, Italy; (A.N.); (A.P.)
| | - Alessandro Piccolo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l’Ambiente, l’Agroalimentare ed i Nuovi Materiali (CERMANU), University of Naples “Federico II”, Via Università 100, 80055 Portici, Italy; (A.N.); (A.P.)
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (G.P.); (V.V.); (G.V.); (A.C.); (G.L.)
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17
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Bifulco A, Silvestri B, Passaro J, Boccarusso L, Roviello V, Branda F, Durante M. A New Strategy to Produce Hemp Fibers through a Waterglass-Based Ecofriendly Process. Materials (Basel) 2020; 13:E1844. [PMID: 32295251 PMCID: PMC7216106 DOI: 10.3390/ma13081844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/01/2020] [Accepted: 04/08/2020] [Indexed: 11/16/2022]
Abstract
Natural fibers such as kenaf, hemp, flax, jute, and sisal have become the subject of much research as potential green or eco-friendly reinforcement composites, since they assure the reduction of weight, cost, and CO2 release with less reliance on oil sources. Herein, an inexpensive and eco-friendly waterglass treatment is proposed, allowing the production of silica-coated fibers that can be easily obtained in micro/nano fibrils through a low power mixer. The silica coating has been exploited to improve the chemical compatibility between fibers and the polymer matrix through the reaction of silanol groups with suitable coupling agents. In particular, silica-coated fibers easily functionalized with (3-Aminopropyl) triethoxysilane (APTS) were used as a filler in the manufacturing of epoxy-based composites. Morphological investigation of the composites through Scanning Electron Microscopy (SEM) demonstrated that the filler has a tendency to produce a web-like structure, formed by continuously interconnected fibrils and microfibrils, from which particularly effective mechanical properties may be obtained. Dynamic Mechanical Analysis (DMA) shows that the functionalized fibers, in a concentration of 5 wt%, strongly affect the glass transformation temperature (10 °C increase) and the storage modulus of the pristine resin. Taking into account the large number of organosilicon compounds (in particular the alkoxide ones) available on the market, the new process appears to pave the way for the cleaner and cheaper production of biocomposites with different polymeric matrices and well-tailored interfaces.
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Affiliation(s)
| | - Brigida Silvestri
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.leTecchio 80, 80125 Naples, Italy; (A.B.); (J.P.); (L.B.); (V.R.); (F.B.); (M.D.)
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18
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Russo P, Venezia V, Tescione F, Avossa J, Luciani G, Silvestri B, Costantini A. Improving Interaction at Polymer-Filler Interface: The Efficacy of Wrinkle Texture. Nanomaterials (Basel) 2020; 10:E208. [PMID: 31991718 PMCID: PMC7074972 DOI: 10.3390/nano10020208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/16/2020] [Accepted: 01/22/2020] [Indexed: 01/13/2023]
Abstract
One of the main issues in preparing polymer-based nanocomposites with effective properties is to achieve a good dispersion of the nanoparticles into the matrix. Chemical interfacial modifications by specific coupling agents represents a good way to reach this objective. Actually, time consuming compatibilization procedures strongly compromise the sustainability of these strategies. In this study, the role of particles' architectures in their dispersion into a poly-lactic acid matrix and their subsequent influences on physical-chemical properties of the obtained nanocomposites were investigated. Two kinds of silica nanoparticles, "smooth" and "wrinkled," with different surface areas (≈30 and ≈600 m2/g respectively) were synthesized through a modified Stöber method and used, without any chemical surface pre-treatments, as fillers to produce poly-lactic acid based nanocomposites. The key role played by wrinkled texture in modifying the physical interaction at the polymer-filler interface and in driving composite properties, was investigated and reflected in the final bulk properties. Detailed investigations revealed the presence of wrinkled nanoparticles, leading to (i) an enormous increase of the chain relaxation time, by almost 30 times compared to the neat PLA matrix; (ii) intensification of the shear-thinning behavior at low shear-rates; and (iii) slightly slower thermal degradation of polylactic acid.
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Affiliation(s)
- Pietro Russo
- Institute for Polymers, Composites and Biomaterials, National Research Council, via Campi Flegrei 34, 80078 Pozzuoli-Naples, Italy;
| | - Virginia Venezia
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (V.V.); (G.L.); (A.C.)
| | - Fabiana Tescione
- Institute for Polymers, Composites and Biomaterials, National Research Council, Portici, 80055 Naples, Italy;
| | - Joshua Avossa
- Institute of Atmospheric Pollution Research-National Research Council (IIA-CNR), Research Area of Rome 1, via Salaria Km 29,300, 00016 Monterotondo, Italy;
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (V.V.); (G.L.); (A.C.)
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (V.V.); (G.L.); (A.C.)
| | - Aniello Costantini
- Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, p.le V. Tecchio 80, 80125 Naples, Italy; (V.V.); (G.L.); (A.C.)
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19
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Vitiello G, Melone P, Silvestri B, Pezzella A, Di Donato P, D’Errico G, Di Napoli M, Zanfardino A, Varcamonti M, Luciani G. Titanium based complexes with melanin precursors as a tool for directing melanogenic pathways. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2018-1210] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Bioinspired melanin based hybrid materials hold huge promise for developing multifunctional systems for a considerable set of applications. Yet, control of melanogenic pathway is a big challenge to allow rational design of nanostructured systems with tuned structures and improved properties. This study proves the ability of titanium ions interactions with melanin precursors in directing melanogenic pathway. To this purpose complementary spectroscopic evidences were collected to reveal that in the presence of a TiO2-sol, amino-acid complex of Ti(IV) ions and DOPA actually inhibits its cyclization, during oxidative process, thus leading to DOPA-based polyphenols, stable even in oxidative environment, rather than eumelanin. This hugely impacts on the biological properties of the final hybrid systems which, discloses relevant and durable antioxidant behavior but poor antimicrobial activity differently from DHICA-based hybrid nanostructures. Overall this study, discloses the high potential of ceramic templated approach in combination with the selection of melanin precursor in achieving a fine tuning of physico-chemical as well as bioactivity of melanin-TiO2 nanostructures, opening new scenarios towards the design of cutting-edge biomaterials with tailored biological properties.
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Affiliation(s)
- Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering , University of Naples “Federico II” , p.le V. Tecchio 80 , 80125 Naples , Italy
- CSGI, Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase, Sesto Fiorentino , via della Lastruccia 3 , Firenze , Italy
| | - Pietro Melone
- Department of Chemical, Materials and Production Engineering , University of Naples “Federico II” , p.le V. Tecchio 80 , 80125 Naples , Italy
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering , University of Naples “Federico II” , p.le V. Tecchio 80 , 80125 Naples , Italy
| | - Alessandro Pezzella
- National Interuniversity Consortium of Materials Science and Technology (INSTM) , Florence , Italy
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR , Via Campi Flegrei 34 , I-80078 Pozzuoli (NA) , Italy
- Department of Chemical Sciences , University of Naples “Federico II” Via Cintia 4 , I-80126 Naples , Italy
| | - Paola Di Donato
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR , Via Campi Flegrei 34 , I-80078 Pozzuoli (NA) , Italy
- Department of Science and Technology , University of Naples “Parthenope” , Centro Direzionale, Isola C4 , 80143 Naples , Italy
| | - Gerardino D’Errico
- Department of Chemical Sciences , University of Naples “Federico II” Via Cintia 4 , I-80126 Naples , Italy
| | - Michela Di Napoli
- Department of Biology , University of Naples “Federico II” Via Cintia 4 , I-80126 Naples , Italy
| | - Anna Zanfardino
- Department of Biology , University of Naples “Federico II” Via Cintia 4 , I-80126 Naples , Italy
| | - Mario Varcamonti
- Department of Biology , University of Naples “Federico II” Via Cintia 4 , I-80126 Naples , Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering , University of Naples “Federico II” , p.le V. Tecchio 80 , 80125 Naples , Italy , Tel.: +390817682433, Fax: +390817682595
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20
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Califano V, Costantini A, Silvestri B, Venezia V, Cimino S, Sannino F. The effect of pore morphology on the catalytic performance of β-glucosidase immobilized into mesoporous silica. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2018-1202] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
β-Glucosidase (BG) was immobilized by adsorption on wrinkled silica nanoparticles (WSNs) and on tannic acid-templated mesoporous silica nanoparticles (TA-MSNPs). The effect induced by a different morphology of the pores of the sorbent on the catalytic performance of β-glucosidase was investigated. A complete textural and morphological characterization of the two samples was performed by Brunauer–Emmett–Teller (BET) method, Fourier Transform Infrared (FT-IR) and transmission electron microscopy (TEM). The results demonstrated that the catalytic performance of the immobilized enzyme depends on the pores size of sorbent but a key factor is the pores morphology. In fact, the BG immobilized on WSNs and TA-MSNPs (BG/WSNs and BG/TA-MSNPs) shows in both cases good catalytic performances in cellobiose hydrolysis, but the catalyst with the best performance is BG/WSNs, in which the support exhibits a central-radial pore structure and a hierarchical trimodal micro-mesoporous pore size. This peculiar morphology allows the enzyme to settle in a place where the interactions with the walls are maximized, increasing its conformational rigidity. Furthermore, the enzyme is prevalently collocated in the interior of pore so that the pores are not completely capped.
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Affiliation(s)
| | - Aniello Costantini
- Department of Chemical Engineering, Materials and Industrial Production , Università degli Studi di Napoli Federico II , P.le Tecchio 80 , 80125 Naples , Italy
| | - Brigida Silvestri
- Department of Chemical Engineering, Materials and Industrial Production , Università degli Studi di Napoli Federico II , P.le Tecchio 80 , 80125 Naples , Italy
| | - Virginia Venezia
- Department of Chemical Engineering, Materials and Industrial Production , Università degli Studi di Napoli Federico II , P.le Tecchio 80 , 80125 Naples , Italy
| | - Stefano Cimino
- Istituto Ricerche Combustione CNR , P.le Tecchio 80, 80125 , Naples , Italy
| | - Filomena Sannino
- Department of Agricultural Sciences , Università degli Studi di Napoli Federico II , Via Università 100 , 80055 Portici (Na) , Italy
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21
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Melone P, Vitiello G, Di Napoli M, Zanfardino A, Caso MF, Silvestri B, Varcamonti M, D'Errico G, Luciani G. Citric Acid Tunes the Formation of Antimicrobial Melanin-Like Nanostructures. Biomimetics (Basel) 2019; 4:E40. [PMID: 31151301 PMCID: PMC6630385 DOI: 10.3390/biomimetics4020040] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/25/2019] [Accepted: 05/28/2019] [Indexed: 11/16/2022] Open
Abstract
Nature has provided a valuable source of inspiration for developing high performance multifunctional materials. Particularly, catechol-containing amino acid l-3,4-dihydroxyphenylalanine (l-DOPA) has aroused the interest to design hybrid multifunctional materials with superior adhesive ability. DOPA oxidative polymerization mediated by either melanogenic enzymes or an alkaline environment involving catechol intermolecular cross-linking, ultimately leads to melanin oligomers. Recently, relevant studies disclosed the ability of Ti-based nanostructures to tune melanin's supramolecular structure during its formation, starting from melanogenic precursors, thus improving both antioxidant and antimicrobial properties. In this work, we propose a novel biomimetic approach to design hybrid DOPA melanin-like nanostructures through a hydrothermal synthesis opportunely modified by using citric acid to control hydrolysis and condensation reactions of titanium alkoxide precursors. UV-Vis and Electron paramagnetic resonance (EPR) spectroscopic evidences highlighted the key role of citrate-Ti(IV) and DOPA-Ti(IV) complexes in controlling DOPA polymerization, which specifically occurred during the hydrothermal step, mediating and tuning its conversion to melanin-like oligomers. Trasmission electron microscopy (TEM) images proved the efficacy of the proposed synthesis approach in tuning the formation of nanosized globular nanostructures, with high biocide performances. The obtained findings could provide strategic guidelines to set up biomimetic processes, exploiting the catechol-metal complex to obtain hybrid melanin-like nanosystems with optimized multifunctional behavior.
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Affiliation(s)
- Pietro Melone
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125 Naples, Italy.
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125 Naples, Italy.
- CSGI, Center for Colloid and Surface Science, via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy.
| | - Michela Di Napoli
- Department of Biology, University of Naples "Federico II" Via Cintia 4, I-80126 Naples, Italy.
| | - Anna Zanfardino
- Department of Biology, University of Naples "Federico II" Via Cintia 4, I-80126 Naples, Italy.
| | - Maria Federica Caso
- Nanofaber Spin-Off at Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Casaccia Research Centre, Via Anguillarese 301, 00123 Rome, Italy.
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125 Naples, Italy.
| | - Mario Varcamonti
- Department of Biology, University of Naples "Federico II" Via Cintia 4, I-80126 Naples, Italy.
| | - Gerardino D'Errico
- CSGI, Center for Colloid and Surface Science, via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy.
- Department of Chemical Sciences, University of Naples "Federico II" Via Cintia 4, I-80126 Naples, Italy.
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", p.le V. Tecchio 80, 80125 Naples, Italy.
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22
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Esposito S, Silvestri B, Russo V, Bonelli B, Manzoli M, Deorsola FA, Vergara A, Aronne A, Di Serio M. Self-Activating Catalyst for Glucose Hydrogenation in the Aqueous Phase under Mild Conditions. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04710] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Serena Esposito
- Dipartimento di Scienza Applicata e Tecnologia e Unità INSTM di Torino-Politecnico, Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy
| | - Brigida Silvestri
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, P.le Tecchio, 80, I-80125 Napoli, Italy
| | - Vincenzo Russo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 4, I-80126 Napoli, Italy
| | - Barbara Bonelli
- Dipartimento di Scienza Applicata e Tecnologia e Unità INSTM di Torino-Politecnico, Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy
| | - Maela Manzoli
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Via Pietro Giuria, 9, I-10125 Torino, Italy
| | - Fabio A. Deorsola
- Dipartimento di Scienza Applicata e Tecnologia e Unità INSTM di Torino-Politecnico, Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy
| | - Alessando Vergara
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 4, I-80126 Napoli, Italy
| | - Antonio Aronne
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, P.le Tecchio, 80, I-80125 Napoli, Italy
| | - Martino Di Serio
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 4, I-80126 Napoli, Italy
- International Research Organization for Advanced Science and Technology (IROAST), University of Kumamoto, 860-8555 Kumamoto, Japan
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23
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Vitiello G, Silvestri B, Luciani G. Learning from Nature: Bioinspired Strategies Towards Antimicrobial Nanostructured Systems. Curr Top Med Chem 2018; 18:22-41. [PMID: 29412108 DOI: 10.2174/1568026618666180206101129] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 12/29/2017] [Accepted: 01/11/2018] [Indexed: 11/22/2022]
Abstract
Microbial contamination still remains a major issue of the modern era, due to the widespread of drug-resistant pathogens. This has prompted researchers to come up with novel antimicrobial systems that could overcome antibiotic-resistance. In this context, nature can provide inestimable source of inspiration to design high-performance multifunctional materials with potent activity against drug-resistant pathogens. Actually, integrating the bio-inspired-approach with nanotechnology can provide cutting-edge solutions for drug-resistant infections. In this context, this review will examine recent advances in the development of bio-inspired antimicrobial nanostructures. Advantages of bioinspired approach to nanomaterials over conventional routes have been highlighted. Generally, bionspired synthesis can be carried out either by mimicking the functions of natural materials/ structures or by mimicking the biological processes employed to produce substances or materials. The review provides an overview of both strategies as applied to the synthesis of inorganic, organic as well as hybrid nanostructures. Antimicrobial efficacy and biological properties of these systems have been highlighted. Antimicrobial and antibiofouling nanostructured surfaces are also discussed.
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Affiliation(s)
- Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy.,CSGI, Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase, Sesto Fiorentino, via della Lastruccia 3, Firenze, Italy
| | - Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy.,Interdisciplinary Research Centre on Biomaterials (CRIB), University of Napoli Federico II, P.le Tecchio 80, Napoli, Italy
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24
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Vitiello G, Zanfardino A, Tammaro O, Di Napoli M, Caso MF, Pezzella A, Varcamonti M, Silvestri B, D'Errico G, Costantini A, Luciani G. Bioinspired hybrid eumelanin–TiO2 antimicrobial nanostructures: the key role of organo–inorganic frameworks in tuning eumelanin's biocide action mechanism through membrane interaction. RSC Adv 2018; 8:28275-28283. [PMID: 35542468 PMCID: PMC9084248 DOI: 10.1039/c8ra04315a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 05/21/2018] [Accepted: 07/27/2018] [Indexed: 11/21/2022] Open
Abstract
Intrinsic biocide efficacy of eumelanins can be markedly enhanced through a templated formation in the presence of a TiO2-sol, leading to hybrid TiO2–melanin nanostructures. However, mechanisms and processes behind biocide activity still remain poorly understood. This paper discloses the fundamental mechanism of action of these systems providing mechanistic information on their peculiar interaction with Escherichia coli strains. To this purpose biocide characterization is combined with Electron Paramagnetic Resonance (EPR) spectroscopy to investigate radical species produced by the hybrids as well as their interactions with Gram(−) external bacterial membranes. Experimental results indicate that TiO2 mediated eumelanin polymerization leads to a peculiar mechanism of action of hybrid nanostructures, whose strong interactions with bacterial membranes enhance the action of reactive oxygen species (ROS) produced by eumelanin degradation itself, also concurring with the final biocide action. These findings provide strategic information for the development of eumelanin-based systems with enhanced activity against drug-resistant strains. Hybrid TiO2/eumelanin nanostructures showed a peculiar biocide mechanism against Gram(−) bacteria, based on the ROS action, produced by eumelanin degradation under visible light irradiation, and the interactions with external bacterial membranes.![]()
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25
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Russo P, Costantini A, Luciani G, Tescione F, Lavorgna M, Branda F, Silvestri B. Thermo-mechanical behavior of poly(butylene terephthalate)/silica nanocomposites. J Appl Polym Sci 2017. [DOI: 10.1002/app.46006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- P. Russo
- Institute for Polymers, Composites and Biomaterials-National Research Council; Pozzuoli Naples 80078 Italy
| | - A. Costantini
- Department of Chemical, Materials and Production Engineering; University of Naples Federico II; Naples 80125 Italy
| | - G. Luciani
- Department of Chemical, Materials and Production Engineering; University of Naples Federico II; Naples 80125 Italy
| | - F. Tescione
- Institute for Polymers, Composites and Biomaterials-National Research Council; Portici Naples 80055 Italy
| | - M. Lavorgna
- Institute for Polymers, Composites and Biomaterials-National Research Council; Portici Naples 80055 Italy
| | - F. Branda
- Department of Chemical, Materials and Production Engineering; University of Naples Federico II; Naples 80125 Italy
| | - B. Silvestri
- Department of Chemical, Materials and Production Engineering; University of Naples Federico II; Naples 80125 Italy
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26
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Silvestri B, Vitiello G, Luciani G, Calcagno V, Costantini A, Gallo M, Parisi S, Paladino S, Iacomino M, D'Errico G, Caso MF, Pezzella A, d'Ischia M. Probing the Eumelanin-Silica Interface in Chemically Engineered Bulk Hybrid Nanoparticles for Targeted Subcellular Antioxidant Protection. ACS Appl Mater Interfaces 2017; 9:37615-37622. [PMID: 29022703 DOI: 10.1021/acsami.7b11839] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We disclose herein the first example of stable monodispersed hybrid nanoparticles (termed MelaSil-NPs) made up of eumelanin biopolymer intimately integrated into a silica nanoscaffold matrix and endowed with high antioxidant and cytoprotective effects associated with a specific subcellular localization. MelaSil-NPs have been fabricated by an optimized sol-gel methodology involving ammonia-induced oxidative polymerization of a covalent conjugate of the eumelanin building block 5,6-dihydroxyindole-2-carboxylic acid (DHICA) with 3-aminopropyltriethoxysilanes (APTS). They displayed a round-shaped (ca. 50-80 nm) morphology, exhibited the typical electron paramagnetic resonance signal of eumelanin biopolymers, and proved effective in promoting decomposition of hydrogen peroxide under physiologically relevant conditions. When administered to human ovarian cancer cells (A2780) or cervical cancer cells (HeLa), MelaSil-NPs were rapidly internalized and colocalized with lysosomes and exerted efficient protecting effects against hydrogen peroxide-induced oxidative stress and cytotoxicity.
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Affiliation(s)
- Brigida Silvestri
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II" , p.le V. Tecchio 80, 80125 Naples, Italy
| | - Giuseppe Vitiello
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II" , p.le V. Tecchio 80, 80125 Naples, Italy
- CSGI, Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase, Sesto Fiorentino , via della Lastruccia 3, 50019 Firenze, Italy
| | - Giuseppina Luciani
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II" , p.le V. Tecchio 80, 80125 Naples, Italy
| | - Vincenzo Calcagno
- Institute of Biophysics and Medical Physic, University of Leipzig , Härtelstraße 16-18, D-04107 Leipzig, Germany
| | - Aniello Costantini
- Department of Chemical, Materials and Production Engineering, University of Naples "Federico II" , p.le V. Tecchio 80, 80125 Naples, Italy
| | - Maria Gallo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "'Federico II"', Naples , Via Pansini, 5, 80131 Naples, Italy
| | - Silvia Parisi
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "'Federico II"', Naples , Via Pansini, 5, 80131 Naples, Italy
- Ceinge Biotecnologie Avanzate , Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Simona Paladino
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "'Federico II"', Naples , Via Pansini, 5, 80131 Naples, Italy
- Ceinge Biotecnologie Avanzate , Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Mariagrazia Iacomino
- Department of Chemical Sciences, University of Naples "Federico II" , Via Cintia 4, I-80126 Naples, Italy
| | - Gerardino D'Errico
- CSGI, Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase, Sesto Fiorentino , via della Lastruccia 3, 50019 Firenze, Italy
- Department of Chemical Sciences, University of Naples "Federico II" , Via Cintia 4, I-80126 Naples, Italy
| | - M Federica Caso
- Nanofaber Spin-off at Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Casaccia Research Centre , Via Anguillarese 301, 00123 Rome, Italy
| | - Alessandro Pezzella
- Department of Chemical Sciences, University of Naples "Federico II" , Via Cintia 4, I-80126 Naples, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) , Florence 50121, Italy
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR , Via Campi Flegrei 34, I-80078 Pozzuoli (NA), Italy
| | - Marco d'Ischia
- Department of Chemical Sciences, University of Naples "Federico II" , Via Cintia 4, I-80126 Naples, Italy
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Vitiello G, Pezzella A, Zanfardino A, Silvestri B, Giudicianni P, Costantini A, Varcamonti M, Branda F, Luciani G. Antimicrobial activity of eumelanin-based hybrids: The role of TiO 2 in modulating the structure and biological performance. Materials Science and Engineering: C 2017; 75:454-462. [DOI: 10.1016/j.msec.2016.12.135] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/16/2016] [Accepted: 12/20/2016] [Indexed: 01/22/2023]
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Branda F, Malucelli G, Durante M, Piccolo A, Mazzei P, Costantini A, Silvestri B, Pennetta M, Bifulco A. Silica Treatments: A Fire Retardant Strategy for Hemp Fabric/Epoxy Composites. Polymers (Basel) 2016; 8:E313. [PMID: 30974587 PMCID: PMC6431956 DOI: 10.3390/polym8080313] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [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: 07/06/2016] [Revised: 07/30/2016] [Accepted: 08/08/2016] [Indexed: 11/23/2022] Open
Abstract
In this paper, for the first time, inexpensive waterglass solutions are exploited as a new, simple and ecofriendly chemical approach for promoting the formation of a silica-based coating on hemp fabrics, able to act as a thermal shield and to protect the latter from heat sources. Fourier Transform Infrared (FTIR) and solid-state Nuclear Magnetic Resonance (NMR) analysis confirm the formation of ⁻C⁻O⁻Si⁻ covalent bonds between the coating and the cellulosic substrate. The proposed waterglass treatment, which is resistant to washing, seems to be very effective for improving the fire behavior of hemp fabric/epoxy composites, also in combination with ammonium polyphosphate. In particular, the exploitation of hemp surface treatment and Ammonium Polyphosphate (APP) addition to epoxy favors a remarkable decrease of the Heat Release Rate (HRR), Total Heat Release (THR), Total Smoke Release (TSR) and Specific Extinction Area (SEA) (respectively by 83%, 35%, 45% and 44%) as compared to untreated hemp/epoxy composites, favoring the formation of a very stable char, as also assessed by Thermogravimetric Analysis (TGA). Because of the low interfacial adhesion between the fabrics and the epoxy matrix, the obtained composites show low strength and stiffness; however, the energy absorbed by the material is higher when using treated hemp. The presence of APP in the epoxy matrix does not affect the mechanical behavior of the composites.
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Affiliation(s)
- Francesco Branda
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
| | - Giulio Malucelli
- Department of Applied Science and Technology, Politecnico di Torino, Viale Teresa Michel 5, Alessandria 15121, Italy.
| | - Massimo Durante
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
| | - Alessandro Piccolo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare e di Nuovi Materiali (CERMANU), Via Università 100, Naples 80055, Italy.
| | - Pierluigi Mazzei
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare e di Nuovi Materiali (CERMANU), Via Università 100, Naples 80055, Italy.
| | - Aniello Costantini
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
| | - Brigida Silvestri
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
| | - Miriam Pennetta
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
| | - Aurelio Bifulco
- Department of Chemical Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy.
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Vecchione R, Luciani G, Calcagno V, Jakhmola A, Silvestri B, Guarnieri D, Belli V, Costantini A, Netti PA. Multilayered silica-biopolymer nanocapsules with a hydrophobic core and a hydrophilic tunable shell thickness. Nanoscale 2016; 8:8798-8809. [PMID: 27065306 DOI: 10.1039/c6nr01192f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Stable, biocompatible, multifunctional and multicompartment nanocarriers are much needed in the field of nanomedicine. Here, we report a simple, novel strategy to design an engineered nanocarrier system featuring an oil-core/hybrid polymer/silica-shell. Silica shells with a tunable thickness were grown in situ, directly around a highly mono-disperse and stable oil-in-water emulsion system, stabilized by a double bio-functional polyelectrolyte heparin/chitosan layer. Such silica showed a complete degradation in a physiological medium (SBF) in a time frame of three days. Moreover, the outer silica shell was coated with polyethyleneglycol (PEG) in order to confer antifouling properties to the final nanocapsule. The outer silica layer combined its properties (it is an optimal bio-interface for bio-conjugations and for the embedding of hydrophilic drugs in the porous structure) with the capability to stabilize the oil core for the confinement of high payloads of lipophilic tracers (e.g., CdSe quantum dots, Nile Red) and drugs. In addition, polymer layers--besides conferring stability to the emulsion while building the silica shell--can be independently exploited if suitably functionalized, as demonstrated by conjugating chitosan with fluorescein isothiocyanate. Such numerous features in a single nanocarrier system make it very intriguing as a multifunctional platform for smart diagnosis and therapy.
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Affiliation(s)
- Raffaele Vecchione
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy. and Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Giuseppina Luciani
- Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy and Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Vincenzo Calcagno
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy. and Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Anshuman Jakhmola
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy.
| | - Brigida Silvestri
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Daniela Guarnieri
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy. and Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Valentina Belli
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy. and Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Aniello Costantini
- Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy and Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
| | - Paolo A Netti
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53 80125 Napoli, Italy. and Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80 80125 Napoli, Italy
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Vitiello G, Pezzella A, Zanfardino A, Varcamonti M, Silvestri B, Costantini A, Branda F, Luciani G. Titania as a driving agent for DHICA polymerization: a novel strategy for the design of bioinspired antimicrobial nanomaterials. J Mater Chem B 2015; 3:2808-2815. [DOI: 10.1039/c5tb00039d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organic materials are widely employed to tune surface chemistry and/or as structuring agents of inorganic materials.
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Affiliation(s)
- Giuseppe Vitiello
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Alessandro Pezzella
- Dipartimento di Scienze Chimiche
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Anna Zanfardino
- Dipartimento di Biologia
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Mario Varcamonti
- Dipartimento di Biologia
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Brigida Silvestri
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Aniello Costantini
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Francesco Branda
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Giuseppina Luciani
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
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Pezzella A, Capelli L, Costantini A, Luciani G, Tescione F, Silvestri B, Vitiello G, Branda F. Towards the development of a novel bioinspired functional material: Synthesis and characterization of hybrid TiO2/DHICA-melanin nanoparticles. Materials Science and Engineering: C 2013; 33:347-55. [DOI: 10.1016/j.msec.2012.08.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Revised: 07/26/2012] [Accepted: 08/29/2012] [Indexed: 11/30/2022]
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Silvestri B, Guarnieri D, Luciani G, Costantini A, Netti PA, Branda F. Fluorescent (rhodamine), folate decorated and doxorubicin charged, PEGylated nanoparticles synthesis. J Mater Sci Mater Med 2012; 23:1697-1704. [PMID: 22484837 DOI: 10.1007/s10856-012-4634-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 03/26/2012] [Indexed: 05/31/2023]
Abstract
PEGylated silica nanoparticles, giving very stable aqueous sols, were successfully functionalised with rhodamine, one of the more stable fluorophore; they were also decorated with the targeting agent folic acid (FA) and charged with the well known drug doxorubicin. Rhodamine functionalization required a modification of the synthesis route of the nanoparticles (NP). Functionalization with FA required activation with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride. Folate decorated NP were easily charged with doxorubicin. The experimental results proved the successfulness of the functionalization. The bond to the NP does not reduce the therapeutic efficacy of the drug. The calculated encapsulation efficiency (32 %) was only a little lower than the value (47 %) reported for the very popular PEGylated PLGA NP.
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Affiliation(s)
- B Silvestri
- Department of Materials and Production Engineering, University of Naples Federico II, 80125, Naples, Italy.
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33
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Chiarion-Sileni V, Guida M, Romanini A, Ridolfi R, Mandala M, Del Bianco P, Silvestri B, Medici M, Michiara M, Dalla Palma M, Puccetti O, Pigozzo J, Laveder F, De Salvo GL. Intensified high-dose intravenous interferon alpha 2b (IFNa2b) for adjuvant treatment of stage III melanoma: A randomized phase III Italian Melanoma Intergroup (IMI) trial [ISRCTN75125874]. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8506] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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34
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Branda F, Tescione F, Ambrogi V, Sannino D, Silvestri B, Luciani G, Costantini A. A new extra situ sol–gel route to silica/epoxy (DGEBA) nanocomposite. A DTA study of imidazole cure kinetic. Polym Bull (Berl) 2011. [DOI: 10.1007/s00289-010-0429-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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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35
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Silvestri B, Luciani G, Costantini A, Tescione F, Branda F, Pezzella A. In‐situ
sol‐gel synthesis and characterization of bioactive pHEMA/SiO
2
blend hybrids. J Biomed Mater Res B Appl Biomater 2008; 89:369-378. [DOI: 10.1002/jbm.b.31225] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- B. Silvestri
- Interdisciplinary Centre of Biomedical Materials (CRIB), Università di Napoli Federico II, Naples 80‐80125, Italy
| | - G. Luciani
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - A. Costantini
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - F. Tescione
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - F. Branda
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - A. Pezzella
- Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, Naples 4‐80126, Italy
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Costantini A, Luciani G, Silvestri B, Tescione F, Branda F. Bioactive poly(2-hydroxyethylmethacrylate)/silica gel hybrid nanocomposites prepared by sol-gel process. J Biomed Mater Res B Appl Biomater 2008; 86:98-104. [DOI: 10.1002/jbm.b.30993] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Luciani G, Costantini A, Silvestri B, Cajafa M, Colella M, Branda F. Effect of the solution flow rate on thein vitro bioactivity of 2.5CaO·2SiO2 glass. J Biomed Mater Res A 2007; 80:592-601. [PMID: 17031823 DOI: 10.1002/jbm.a.30959] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A comparative study of in vitro bioactivity of 2.5CaO x 2SiO(2) glass has been carried out by soaking it in a simulated body fluid, with continuously and periodic exchange of this solution (dynamic and differential protocols). Dynamic assays were carried out at different solution flow rates, 3 mL/h, 6 mL/h, 12 mL/h, to study the influence of flow rate on glass reactivity. Glass surface was studied by Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy so as to compare the behavior in the two procedures, revealing that in both cases an apatite layer is formed on the glass surface, although there are differences on deposition rate and morphology, which are also influenced by the solution flow rate.
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Affiliation(s)
- G Luciani
- Dipartimento di Ingegneria dei Materiali e della Produzione, Piazzale Tecchio, 80-80125 Napoli, Italy.
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Costantini A, Luciani G, Annunziata G, Silvestri B, Branda F. Swelling properties and bioactivity of silica gel/pHEMA nanocomposites. J Mater Sci Mater Med 2006; 17:319-25. [PMID: 16617410 DOI: 10.1007/s10856-006-8230-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2004] [Accepted: 08/18/2005] [Indexed: 05/08/2023]
Abstract
A novel hydrogel based on 2-hydroxyethyl- methacrilate and SiO(2) nanoparticles was prepared. The filler was added at a concentration of 30% w/w of silica nanoparticles to the mass of polymer. The composite material was characterised as far as concerns swelling behaviour in comparison to pHEMA. Swelling ratio of modified pHEMA was higher. Bioactivity of both SiO(2) nanoparticles and the modified hydrogel was evaluated by soaking samples into a simulated body fluid (SBF). FT-IR spectroscopy, scanning electron microscopy (SEM) and energy dispersive system (EDS) results suggest silica nanoparticles keep bioactive in the polymer. SiO(2) filler in a p(HEMA) matrix makes the composite bioactive. Therefore, these composites can be used to make bioactive scaffold for bone engineering.
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Affiliation(s)
- A Costantini
- Dipartimento di Ingegneria dei Materiali e della Produzione, Universitá di Napoli Federico II, Piazzale Tecchio, 80-80125 Napoli, Italy.
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Hackbarth DP, Schnopp-Wyatt D, Katz D, Williams J, Silvestri B, Pfleger M. Collaborative research and action to control the geographic placement of outdoor advertising of alcohol and tobacco products in Chicago. Public Health Rep 2002. [PMID: 12196615 DOI: 10.1016/s0033-3549(04)50088-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Community activists in Chicago believed their neighborhoods were being targeted by alcohol and tobacco outdoor advertisers, despite the Outdoor Advertising Association of America's voluntary code of principles, which claims to restrict the placement of ads for age-restricted products and prevent billboard saturation of urban neighborhoods. A research and action plan resulted from a 10-year collaborative partnership among Loyola University Chicago, the American Lung Association of Metropolitan Chicago (ALAMC), and community activists from a predominately African American church, St. Sabina Parish. In 1997 Loyola University and ALAMC researchers conducted a cross-sectional prevalence survey of alcohol and tobacco outdoor advertising. Computer mapping was used to locate all 4,247 licensed billboards in Chicago that were within 500- and 1,000-foot radiuses of schools, parks, and playlots. A 50% sample of billboards was visually surveyed and coded for advertising content. The percentage of alcohol and tobacco billboards within the 500- and 1,000-foot zones ranged from 0% to 54%. African American and Hispanic neighborhoods were disproportionately targeted for outdoor advertising of alcohol and tobacco. Data were used to convince the Chicago City Council to pass one of the nation's toughest anti-alcohol and tobacco billboard ordinances, based on zoning rather than advertising content. The ordinance was challenged in court by advertisers. Recent Supreme Court rulings made enactment of local billboard ordinances problematic. Nevertheless, the research, which resulted in specific legislative action, demonstrated the importance of linkages among academic, practice, and grassroots community groups in working together to diminish one of the social causes of health disparities.
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Affiliation(s)
- D P Hackbarth
- Marcella Niehoff School of Nursing, Loyola University Chicago, 6525 N. Sheridan Road, Chicago, IL 60626, USA.
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40
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Bruttomesso D, Fongher C, Silvestri B, Barberio S, Marescotti MC, Iori E, Valerio A, Crazzolara D, Pianta A, Tiengo A, Del Prato S. Combination of continuous subcutaneous infusion of insulin and octreotide in Type 1 diabetic patients. Diabetes Res Clin Pract 2001; 51:97-105. [PMID: 11165689 DOI: 10.1016/s0168-8227(00)00210-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The effect of 7 day continuous subcutaneous infusion of octreotide (200 microg day(-1)) was evaluated in seven insulin-pump treated Type 1 diabetic patients (age 43+/-1.5 year; BMI 25.1+/-0.7 kg m(-2); HbA(1c) 7.4+/-0.3%). A 24-h metabolic and hormonal profile, and a euglycaemic hyperinsulinaemic clamp (0.25, 0.5, 1.0 mg kg(-1) min(-1)), with [3H]glucose infusion and indirect calorimetry, were performed before and after a 7-day octreotide infusion. Mean 24-h plasma glucose was similar before and after octreotide (9.7+/-0.8 vs. 9.1+/-1.0 mmol l(-1)) but insulin requirement dropped by 45% (49+/-4 vs. 27+/-2 U day(-1); P<0.01). Both 24-h plasma hGH and glucagon were suppressed by octreotide (1.85+/-0.35 vs. 0.52+/-0.04 microg l(-1), and 117+/-23 vs. 102+/-14 ng l(-1), respectively). Glucose utilisation increased after octreotide (insulin 0.5 mU kg(-1) min(-1) clamp 3.09+/-0.23 vs. 4.19+/-0.19 mg kg(-1) min(-1); 1 mU kg(-1) min(-1) clamp 5.64+/-0.61 vs. 7.93+/-0.57 mg kg(-1) min(-1); both P<0.05) and endogenous glucose production was similarly suppressed. Glucose oxidation was not affected by octreotide, while the improvement in glucose storage (insulin 1.0 mU kg(-1) min(-1) clamp 3.89+/-0.60 vs. 5.64+/-0.67 mg kg(-1) min(-1), P<0.05) entirely accounted for the increase in glucose disposal. Endogenous glucose production was more effectively suppressed at the two lower insulin infusion rates (P>0.05). Energy expenditure declined after octreotide. Continuous subcutaneous octreotide infusion suppresses counterregulatory hormones, increases insulin-mediated glucose metabolism by enhancing glucose storage, and reduces energy expenditure. These results support a role for counterregulatory hormones in the genesis of insulin resistance and the catabolic state of Type 1 diabetes.
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Affiliation(s)
- D Bruttomesso
- Department of Clinical and Experimental Medicine, Cattedra di Malattie del Metabolismo, University of Padova, Via Giustiniani 2, 35128, Padova, Italy
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Hackbarth DP, Schnopp-Wyatt D, Katz D, Williams J, Silvestri B, Pfleger M. Collaborative research and action to control the geographic placement of outdoor advertising of alcohol and tobacco products in Chicago. Public Health Rep 2001; 116:558-67. [PMID: 12196615 PMCID: PMC1497388 DOI: 10.1093/phr/116.6.558] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Community activists in Chicago believed their neighborhoods were being targeted by alcohol and tobacco outdoor advertisers, despite the Outdoor Advertising Association of America's voluntary code of principles, which claims to restrict the placement of ads for age-restricted products and prevent billboard saturation of urban neighborhoods. A research and action plan resulted from a 10-year collaborative partnership among Loyola University Chicago, the American Lung Association of Metropolitan Chicago (ALAMC), and community activists from a predominately African American church, St. Sabina Parish. In 1997 Loyola University and ALAMC researchers conducted a cross-sectional prevalence survey of alcohol and tobacco outdoor advertising. Computer mapping was used to locate all 4,247 licensed billboards in Chicago that were within 500- and 1,000-foot radiuses of schools, parks, and playlots. A 50% sample of billboards was visually surveyed and coded for advertising content. The percentage of alcohol and tobacco billboards within the 500- and 1,000-foot zones ranged from 0% to 54%. African American and Hispanic neighborhoods were disproportionately targeted for outdoor advertising of alcohol and tobacco. Data were used to convince the Chicago City Council to pass one of the nation's toughest anti-alcohol and tobacco billboard ordinances, based on zoning rather than advertising content. The ordinance was challenged in court by advertisers. Recent Supreme Court rulings made enactment of local billboard ordinances problematic. Nevertheless, the research, which resulted in specific legislative action, demonstrated the importance of linkages among academic, practice, and grassroots community groups in working together to diminish one of the social causes of health disparities.
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Affiliation(s)
- D P Hackbarth
- Marcella Niehoff School of Nursing, Loyola University Chicago, 6525 N. Sheridan Road, Chicago, IL 60626, USA.
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Silvestri B, Calderazzo F, Coppola V, Rosato A, Iacobelli S, Natoli C, Ullrich A, Sures I, Azam M, Brakebush C, Chieco-Bianchi L, Amadori A. Differential effect on TCR:CD3 stimulation of a 90-kD glycoprotein (gp90/Mac-2BP), a member of the scavenger receptor cysteine-rich domain protein family. Clin Exp Immunol 1998; 113:394-400. [PMID: 9737668 PMCID: PMC1905063 DOI: 10.1046/j.1365-2249.1998.00654.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We studied the effects of a 90-kD glycoprotein (gp90/Mac-2BP) belonging to the scavenger receptor family, present in normal serum and at increased levels in inflammatory disease and cancer patients, on some T cell function parameters. Whereas the lymphocyte proliferative response to non-specific mitogens such as phytohaemagglutinin (PHA) and concanavalin A (Con A), but not pokeweed mitogen (PWM), was strongly reduced, probably due to the lectin-binding properties of gp90/Mac-2BP, the response to T cell receptor (TCR) agonists such as superantigens and allogeneic cells was potentiated. When lymphocytes were stimulated with different anti-TCR:CD3 MoAbs, both in soluble and solid-phase form, gp90/Mac-2BP was able to down-regulate the proliferative response to anti-CD3 MoAb, whereas the response to anti-TCR alphabeta MoAb was enhanced. A similar differential effect was observed when a MoAb against CD5 (another member of the scavenger receptor superfamily) was added to anti-CD3 or anti-TCR-stimulated cells; anti-CD5 MoAb strongly down-modulated the CD3-mediated response, whereas its presence in culture was associated with potentiation of the response to TCR alphabeta agonists. gp90/Mac-2BP was able per se to up-regulate Ca2+ levels in freshly isolated lymphocytes; moreover, its presence in culture was associated with increased Ca2+ mobilization following stimulation with anti-TCR alphabeta, but not anti-CD3 MoAb. These data indicate that gp90/Mac-2BP could be able to influence some immune responses, possibly through multiple homologous interactions with other members of the scavenger receptor family; moreover, our findings suggest that signalling through the different components of the TCR:CD3 complex may follow distinct activation pathways into the cells.
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Affiliation(s)
- B Silvestri
- Department of Oncology and Surgical Sciences, Interuniversity Centre for Research on Cancer, University of Padova, Italy
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Affiliation(s)
- M Wholey
- Department of Radiology, Louisiana State University Medical Center, New Orleans 70112, USA
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Coppola V, Veronesi A, Indraccolo S, Calderazzo F, Mion M, Minuzzo S, Esposito G, Mauro D, Silvestri B, Gallo P, Falagiani P, Amadori A, Chieco-Bianchi L. Lymphoproliferative disease in human peripheral blood mononuclear cell-injected SCID mice. IV. Differential activation of human Th1 and Th2 lymphocytes and influence of the atopic status on lymphoma development. J Immunol 1998; 160:2514-22. [PMID: 9498797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Intraperitoneal transfer of PBMC from EBV+ donors into SCID mice leads to high human Ig levels in mouse serum and B cell lymphoproliferative disease. As these events depend on the activation of coinjected human T cells, we addressed the behavior of the Th1 and Th2 subsets in this model. Production of IFN-gamma, but not of Th2 cytokines such as IL-4, was detected in culture supernatants of PBMC stimulated in vitro with mouse splenocytes. Moreover, anti-CD3 stimulation of the human cells recovered from mice brought about IFN-gamma, but not IL-4, synthesis; on the other hand, PCR and in situ hybridization analysis of ex vivo-recovered cells disclosed the presence of mRNA for both cytokines following in vitro restimulation, thus suggesting posttranscriptional regulation of IL-4 gene expression. When SCID mice were inoculated with PBMC from atopic donors, whose Th1/Th2 profile displays an imbalance toward Th2 cells, tumor development rates were lower, and tumor latency was higher, compared with those in mice injected with PBMC from normal donors. Isotypic analysis of human Ig in mouse serum showed the exclusive presence of IFN-gamma-driven IgG subclasses; in addition, human IgE were low or undetectable in most cases. These findings indicate that following transfer into SCID mice, human Th1 lymphocytes undergo preferential activation, whereas Th2 function is down-regulated. Th1 lymphocytes probably are a major component in promoting EBV+ B cell expansion and tumor development; the individual Th1/Th2 profile could in part account for the as yet unexplained donor variability in tumor generation in this experimental model.
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Affiliation(s)
- V Coppola
- Department of Oncology and Surgical Sciences, Interuniversity Center for Research on Cancer, University of Padua, Italy
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Neitzschman HR, Silvestri B. Radiology case of the month. Chronic seizure disorder. Arteriovenous malformation. J La State Med Soc 1996; 148:385-6. [PMID: 9150666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Bruttomesso D, Barberio S, Fongher C, Lisato G, Silvestri B, Briani G, Tiengo A, Del Prato S. Retrospective analysis of daily glucose profile in type 1 diabetic patients with continuous subcutaneous insulin infusion (CSII). Diabetes Res Clin Pract 1992; 16:197-202. [PMID: 1425140 DOI: 10.1016/0168-8227(92)90117-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A retrospective analysis of blood glucose control was performed in 17 type 1 diabetic patients who regularly monitored their blood glucose concentration by visual strips over a period of 3-83 months. Analysis was performed by a patient management software loaded on a personal computer. In this cohort of patients the average daily blood glucose reading was 1.6 +/- 0.3. Blood glucose readings were collected more frequently following meal ingestion (40.3%) than in the post-absorptive state (24.6%; P less than 0.05). Blood glucose concentration fluctuated from a basal level of 146 +/- 5 mg/dl to 167 +/- 4 mg/dl in the post-prandial phases with an average daily value of 156 +/- 2 mg/dl. Blood glucose values below 80 mg/dl were evenly distributed throughout the day, while hyperglycemia (greater than 300 mg/dl) occurred more commonly after meals (42%). Daily blood glucose was higher during weekends (164 +/- 5 mg/dl) than during weekdays (155 +/- 2 mg/dl; P less than 0.05). A weak correlation was found between the number of blood glucose readings/day and daily blood glucose level. These results suggest that long-term maintenance of satisfactory metabolic control is attainable in type 1 diabetic patients and that this is mainly dependent upon subject self awareness.
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Affiliation(s)
- D Bruttomesso
- Cattedra di Malattie del Ricambio, Università di Padova, Italy
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Abstract
The purpose of this paper is to compare the content of samples of curricula in current use in the nation's schools and curricula recently developed by researchers. We describe briefly the nature of these curricula. We then provide an analysis of their content.
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Silvestri B. Use of the journal in an introductory course of physical therapy. Phys Ther 1978; 58:984-6. [PMID: 674386 DOI: 10.1093/ptj/58.8.984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Silvestri B. "Let's have a heart to heart talk. . .". Phys Ther 1978; 58:445-6. [PMID: 635025 DOI: 10.1093/ptj/58.4.445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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