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Soliman MG, Trinh DN, Ravagli C, Meleady P, Henry M, Movia D, Doumett S, Cappiello L, Prina-Mello A, Baldi G, Monopoli MP. Development of a fast and simple method for the isolation of superparamagnetic iron oxide nanoparticles protein corona from protein-rich matrices. J Colloid Interface Sci 2024; 659:503-519. [PMID: 38184993 DOI: 10.1016/j.jcis.2023.11.177] [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: 09/22/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 01/09/2024]
Abstract
The adsorption of proteins onto the surface of nanoparticle (NP) leads to the formation of the so-called "protein corona" as consisting both loosely and tightly bound proteins. It is well established that the biological identity of NPs that may be acquired after exposure to a biological matrix is mostly provided by the components of the hard corona as the pristine surface is generally less accessible for binding. For that reason, the isolation and the characterisation of the NP-corona complexes and identification of the associated biomolecules can help in understanding its biological behaviour. Established methods for the isolation of the NP-HC complexes are time-demanding and can lead to different results based on the isolation method applied. Herein, we have developed a fast and simple method using ferromagnetic beads isolated from commercial MACS column and used for the isolation of superparamagnetic NP following exposure to different types of biological milieu. We first demonstrated the ability to easily isolate superparamagnetic iron oxide NPs (IONPs) from different concentrations of human blood plasma, and also tested the method on the corona isolation using more complex biological matrices, such as culture medium containing pulmonary mucus where the ordinary corona methods cannot be applied. Our developed method showed less than 20% difference in plasma corona composition when compared with centrifugation. It also showed effective isolation of NP-HC complexes from mucus-containing culture media upon comparing with centrifugation and MACS columns, which failed to wash out the unbound proteins. Our study was supported with a full characterisation profile including dynamic light scattering, nanoparticle tracking analysis, analytical disk centrifuge, and zeta potentials. The biomolecules/ proteins composing the HC were separated by vertical gel electrophoresis and subsequently analysed by liquid chromatography-tandem mass spectrometry. In addition to our achievements in comparing different isolation methods to separate IONPs with corona from human plasma, this is the first study that provides a complete characterisation profile of particle protein corona after exposure in vitro to pulmonary mucus-containing culture media.
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Affiliation(s)
- Mahmoud G Soliman
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland; Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
| | - Duong N Trinh
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland
| | - Costanza Ravagli
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Paula Meleady
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Michael Henry
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Dania Movia
- Laboratory for Biological Characterisation of Advanced Materials (LBCAM), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland; Applied Radiation Therapy Trinity (ARTT), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland
| | - Saer Doumett
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Laura Cappiello
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Adriele Prina-Mello
- Laboratory for Biological Characterisation of Advanced Materials (LBCAM), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland; Nanomedicine and Molecular Imaging Group, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Giovanni Baldi
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Marco P Monopoli
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland.
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Marassi V, Zanoni I, Ortelli S, Giordani S, Reschiglian P, Roda B, Zattoni A, Ravagli C, Cappiello L, Baldi G, Costa AL, Blosi M. Native Study of the Behaviour of Magnetite Nanoparticles for Hyperthermia Treatment during the Initial Moments of Intravenous Administration. Pharmaceutics 2022; 14:pharmaceutics14122810. [PMID: 36559302 PMCID: PMC9782478 DOI: 10.3390/pharmaceutics14122810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/06/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Magnetic nanoparticles (MNPs) present outstanding properties making them suitable as therapeutic agents for hyperthermia treatments. Since the main safety concerns of MNPs are represented by their inherent instability in a biological medium, strategies to both achieve long-term stability and monitor hazardous MNP degradation are needed. We combined a dynamic approach relying on flow field flow fractionation (FFF)-multidetection with conventional techniques to explore frame-by-frame changes of MNPs injected in simulated biological medium, hypothesize the interaction mechanism they are subject to when surrounded by a saline, protein-rich environment, and understand their behaviour at the most critical point of intravenous administration. In the first moments of MNPs administration in the patient, MNPs change their surrounding from a favorable to an unfavorable medium, i.e., a complex biological fluid such as blood; the particles evolve from a synthetic identity to a biological identity, a transition that needs to be carefully monitored. The dynamic approach presented herein represents an optimal alternative to conventional batch techniques that can monitor only size, shape, surface charge, and aggregation phenomena as an averaged information, given that they cannot resolve different populations present in the sample and cannot give accurate information about the evolution or temporary instability of MNPs. The designed FFF method equipped with a multidetection system enabled the separation of the particle populations providing selective information on their morphological evolution and on nanoparticle-proteins interaction in the very first steps of infusion. Results showed that in a dynamic biological setting and following interaction with serum albumin, PP-MNPs retain their colloidal properties, supporting their safety profile for intravenous administration.
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Affiliation(s)
- Valentina Marassi
- Department of Chemistry G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Stem Sel srl, University of Bologna, 40129 Bologna, Italy
- Correspondence:
| | - Ilaria Zanoni
- CNR-ISSMC, Institute of Science, Technology and Sustainability for Ceramics (Former ISTEC), Via Granarolo 64, 48018 Faenza, Italy
| | - Simona Ortelli
- CNR-ISSMC, Institute of Science, Technology and Sustainability for Ceramics (Former ISTEC), Via Granarolo 64, 48018 Faenza, Italy
| | - Stefano Giordani
- Department of Chemistry G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Pierluigi Reschiglian
- Department of Chemistry G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Stem Sel srl, University of Bologna, 40129 Bologna, Italy
| | - Barbara Roda
- Department of Chemistry G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Stem Sel srl, University of Bologna, 40129 Bologna, Italy
| | - Andrea Zattoni
- Department of Chemistry G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Stem Sel srl, University of Bologna, 40129 Bologna, Italy
| | - Costanza Ravagli
- Ce.Ri.Col, Colorobbia Consulting S.R.L., 50059 Sovigliana Vinci, Italy
| | - Laura Cappiello
- Ce.Ri.Col, Colorobbia Consulting S.R.L., 50059 Sovigliana Vinci, Italy
| | - Giovanni Baldi
- Ce.Ri.Col, Colorobbia Consulting S.R.L., 50059 Sovigliana Vinci, Italy
| | - Anna L. Costa
- CNR-ISSMC, Institute of Science, Technology and Sustainability for Ceramics (Former ISTEC), Via Granarolo 64, 48018 Faenza, Italy
| | - Magda Blosi
- CNR-ISSMC, Institute of Science, Technology and Sustainability for Ceramics (Former ISTEC), Via Granarolo 64, 48018 Faenza, Italy
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Rodríguez-Esparragón F, Torres-Mata LB, López-Fernández JC, Cappiello L, González-Martín JM, Clavo B, Serna-Gómez JA, Estupiñán-Quintana L, Torres-Ascensión C, Villar J. Clinical relevance of circulating angiogenic cells in patients with ischemic stroke. BMC Cardiovasc Disord 2022; 22:118. [PMID: 35313809 PMCID: PMC8939119 DOI: 10.1186/s12872-021-02421-8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/12/2021] [Indexed: 11/30/2022] Open
Abstract
Background Endothelial progenitor cells (EPCs) are circulating angiogenic cells with endothelial features associated with risk for stroke. We aimed to delve into their functional characteristics. EPCs were isolated and cultured from Ischemic Stroke (IS) patients and predictors of their variance evaluated. Methods This is a single-center observational study evaluating 187 consecutively hospitalized patients with IS. EPCs were isolated from blood samples. The number of circulating angiogenic cells (CACs), colony-forming units (CFU-ECs) and the emergence of late outgrowths endothelial cells (LOECs) were counted. We collected clinical variables and measured the stromal cell-derived factor 1 alpha (SDF1α) serum levels. We also examined the relative telomere length and the expression of osteogenic gene markers in CACs. Results CACs counts and CFU-ECs colony numbers were positively correlated (rho = 0.41, p < 0.001, n = 187). We found significant differences according to whether thrombolytic treatment was performed in the distribution of CFU-ECs (odds ratio (OR) = 2.5; 95% confidence interval (CI) 1.01–6.35; p = 0.042) and CACs (OR = 4.45; 95% IC 1.2–15.5; p = 0.012). The main determinants of CACs variation were the number of risks factors, thrombolysis treatment, arterial hypertension, LOECs occurrence, and the vascular endothelial growth factor expression, whereas CFU-ECs variations depended on hemoglobin content and the relative reduction in the National Institutes of Health Stroke Scale (NIHSS) criteria. The main predictors of LOECs appearance were thrombolysis and length of hospital stay. Conclusions Our study supports the relevance of patient risk factors and treatments in the analysis of the functional properties of EPCs.
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Affiliation(s)
- Francisco Rodríguez-Esparragón
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain.
| | - Laura B Torres-Mata
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain
| | | | - Laura Cappiello
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain
| | - Jesús M González-Martín
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain
| | - Bernardino Clavo
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain.,Chronic Pain Unit, Hospital Universitario Dr. Negrín, Las Palmas de Gran Canaria, Spain.,Radiation Oncology Department, Hospital Universitario Dr. Negrín, Las Palmas de Gran Canaria, Spain.,Universitary Institute for Research in Biomedicine and Health (iUIBS), Molecular and Translational Pharmacology Group, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.,Spanish Group of Clinical Research in Radiation Oncology (GICOR), 28029, Madrid, Spain.,Research Network On Health Services in Chronic Diseases (REDISSEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Jaime A Serna-Gómez
- Department of Cardiovascular Surgery, Hospital Universitario Dr. Negrín, Las Palmas de Gran Canaria, Spain
| | - Lidia Estupiñán-Quintana
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain
| | - Cristina Torres-Ascensión
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain
| | - Jesús Villar
- Research Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de La Ballena S/N, 35019, Las Palmas de Gran Canaria, Spain.,CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain.,Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, ON, Canada
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Armanetti P, Flori A, Avigo C, Conti L, Valtancoli B, Petroni D, Doumett S, Cappiello L, Ravagli C, Baldi G, Bencini A, Menichetti L. Spectroscopic and photoacoustic characterization of encapsulated iron oxide super-paramagnetic nanoparticles as a new multiplatform contrast agent. Spectrochim Acta A Mol Biomol Spectrosc 2018; 199:248-253. [PMID: 29626815 DOI: 10.1016/j.saa.2018.03.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 03/09/2018] [Accepted: 03/10/2018] [Indexed: 05/24/2023]
Abstract
Recently, a number of photoacoustic (PA) agents with increased tissue penetration and fine spatial resolution have been developed for molecular imaging and mapping of pathophysiological features at the molecular level. Here, we present bio-conjugated near-infrared light-absorbing magnetic nanoparticles as a new agent for PA imaging. These nanoparticles exhibit suitable absorption in the near-infrared region, with good photoacoustic signal generation efficiency and high photo-stability. Furthermore, these encapsulated iron oxide nanoparticles exhibit strong super-paramagnetic behavior and nuclear relaxivities that make them useful as magnetic resonance imaging (MRI) contrast media as well. Their simple bio-conjugation strategy, optical and chemical stability, and straightforward manipulation could enable the development of a PA probe with magnetic and spectroscopic properties suitable for in vitro and in vivo real-time imaging of relevant biological targets.
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Affiliation(s)
- Paolo Armanetti
- Istituto di Fisiologia Clinica, CNR, Via Giuseppe Moruzzi 1, Pisa 56124, Italy
| | - Alessandra Flori
- Fondazione Regione Toscana G. Monasterio, Via Giuseppe Moruzzi 1, Pisa 56124, Italy
| | - Cinzia Avigo
- Istituto di Fisiologia Clinica, CNR, Via Giuseppe Moruzzi 1, Pisa 56124, Italy
| | - Luca Conti
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Barbara Valtancoli
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Debora Petroni
- Istituto di Fisiologia Clinica, CNR, Via Giuseppe Moruzzi 1, Pisa 56124, Italy
| | - Saer Doumett
- Colorobbia Consulting Srl, via Pietramarina 123, 50053 Sovigliana, Vinci, Italy
| | - Laura Cappiello
- Colorobbia Consulting Srl, via Pietramarina 123, 50053 Sovigliana, Vinci, Italy
| | - Costanza Ravagli
- Colorobbia Consulting Srl, via Pietramarina 123, 50053 Sovigliana, Vinci, Italy
| | - Giovanni Baldi
- Colorobbia Consulting Srl, via Pietramarina 123, 50053 Sovigliana, Vinci, Italy
| | - Andrea Bencini
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Luca Menichetti
- Istituto di Fisiologia Clinica, CNR, Via Giuseppe Moruzzi 1, Pisa 56124, Italy.
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D'Elios MM, Aldinucci A, Amoriello R, Benagiano M, Bonechi E, Maggi P, Flori A, Ravagli C, Saer D, Cappiello L, Conti L, Valtancoli B, Bencini A, Menichetti L, Baldi G, Ballerini C. Myelin-specific T cells carry and release magnetite PGLA–PEG COOH nanoparticles in the mouse central nervous system. RSC Adv 2018; 8:904-913. [PMID: 35538965 PMCID: PMC9076978 DOI: 10.1039/c7ra11290d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 10/13/2017] [Accepted: 12/13/2017] [Indexed: 11/21/2022] Open
Abstract
Progress in nanotechnology has determined new strategies concerning drug delivery into the central nervous system for the treatment of degenerative and inflammatory diseases. To date, brain targeting through systemic drug administration, even in a nano-composition, is often unsuccessful. Therefore, we investigated the possibility of loading T lymphocytes with PGLA–PEG COOH magnetite nanoparticles (30 nm), which can be built up to easily bind drugs and monoclonal antibodies, and to exploit the ability of activated T cells to cross the blood–brain barrier and infiltrate the brain parenchyma. Iron oxide nanoparticles have been widely used in biomedical applications due to their theranostic properties and are therefore a well-established nanomaterial. The magnetite core is easily hybridized with polymeric compounds that may enhance the possibility of the nanoparticles entering cells with low phagocytic properties. Taking advantage of these material characteristics, after in vitro assessment of the viability and functionality of nano-loaded MOG35–55 specific T cells, we transferred cells containing the nano-cargo into naïve mice affected by experimental autoimmune encephalomyelitis, an animal model of multiple sclerosis. By means of histological and immunohistological methods, we were able to identify the nano-loaded T cells in the central nervous system. Our data demonstrated that T cells containing nanomaterials hold the possibility of carrying and releasing nanoparticles in the brain. Magnetite nanoparticles enter non-phagocytic myelin-specific T cells and reach the central nervous system after in vivo transfer.![]()
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Affiliation(s)
- M. M. D'Elios
- Department of Clinical and Experimental Medicine
- University of Florence
- Italy
| | - A. Aldinucci
- Department of Neuroscience, Psychology, Drug and Child Health
- University of Florence
- Italy
| | - R. Amoriello
- Department of Neuroscience, Psychology, Drug and Child Health
- University of Florence
- Italy
| | - M. Benagiano
- Department of Clinical and Experimental Medicine
- University of Florence
- Italy
| | - E. Bonechi
- Department of Neuroscience, Psychology, Drug and Child Health
- University of Florence
- Italy
| | - P. Maggi
- Department of Neurology
- Hôpital CHU Brugmann-Université libre de Bruxelles-Bruxelles-Be
- Belgium
| | - A. Flori
- Fondazione CNR Regione Toscana G. Monasterio
- Pisa
- Italy
| | - C. Ravagli
- Research Center Colorobbia
- Cericol, Colorobbia Consulting
- Florence
- Italy
| | - D. Saer
- Research Center Colorobbia
- Cericol, Colorobbia Consulting
- Florence
- Italy
| | - L. Cappiello
- Research Center Colorobbia
- Cericol, Colorobbia Consulting
- Florence
- Italy
| | - L. Conti
- Department of Chemistry Ugo Schiff
- University of Florence
- Italy
| | - B. Valtancoli
- Department of Chemistry Ugo Schiff
- University of Florence
- Italy
| | - A. Bencini
- Department of Chemistry Ugo Schiff
- University of Florence
- Italy
| | | | - G. Baldi
- Research Center Colorobbia
- Cericol, Colorobbia Consulting
- Florence
- Italy
| | - C. Ballerini
- Department of Neuroscience, Psychology, Drug and Child Health
- University of Florence
- Italy
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Rodríguez-Esparragón F, López-Fernández JC, Buset-Ríos N, García-Bello MA, Hernández-Velazquez E, Cappiello L, Rodríguez-Pérez JC. Paraoxonase 1 and 2 gene variants and the ischemic stroke risk in Gran Canaria population: an association study and meta-analysis. Int J Neurosci 2016; 127:191-198. [PMID: 26978533 DOI: 10.3109/00207454.2016.1165675] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE OF THE STUDY The present study aims to evaluate the relationship between rs662 (Gln(Q)192Arg(R)) and rs854560 (L55M) and the rs7493 (S311C) in the paraoxonase genes and ischemic stroke (IS) in the population of Gran Canaria (Canary Islands). The association with stroke was also evaluated using systematic review and meta-analysis. METHODS A total of 129 IS patients and 176 age and gender matched controls were enrolled. For meta-analysis, eligible studies were identified through search in public databases. RESULTS In multivariate regression analysis only the PON2 S311C variant showed to be an independent predictor of IS (OR = 0.093, 95% CI: 0.014-0.627). Overall, no significant association was found between L55M and IS when all studies were pooled nor by subgroup analysis by ethnicity. Gln192Arg showed a modest risk for IS in the global and in Asian population but with high heterogeneity among studies. A modest risk under a dominant inheritance model was found for the S311C variant with an overall random effect OR of 1.004 (95% CI: 1.00-1.35). There was strong evidence of heterogeneity among studies ( p = 0.0097, I2 = 25.35%) which did not disappear after stratification by ethnicity. CONCLUSIONS The overall analysis shows a significant contribution of the rs662 variant to IS risk. We found that the CC genotype of the PON2 S311C polymorphism is a risk factor for IS. Results of the meta-analysis partially support this conclusion.
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Affiliation(s)
- Francisco Rodríguez-Esparragón
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain.,c Universidad de Las Palmas de Gran Canaria (ULPGC) , Gran Canaria , Spain
| | - Juan Carlos López-Fernández
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain.,b Servicio de Neurología, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain.,c Universidad de Las Palmas de Gran Canaria (ULPGC) , Gran Canaria , Spain
| | - Nisa Buset-Ríos
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain
| | - Miguel A García-Bello
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain
| | - Erika Hernández-Velazquez
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain
| | - Laura Cappiello
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain
| | - José Carlos Rodríguez-Pérez
- a Unidad de Investigación, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain.,b Servicio de Neurología, Hospital Universitario de Gran Canaria Doctor Negrín , Gran Canaria , Spain.,c Universidad de Las Palmas de Gran Canaria (ULPGC) , Gran Canaria , Spain
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Silber E, Radue EW, Barkhof F, Gottschalk R, Zhang Y, Cappiello L, von Rosenstiel P, Kappos L. SUSTAINED LOW RATE BRAIN VOLUME LOSS IN LONG TERM FINGOLIMOD TREATMENT. J Neurol Neurosurg Psychiatry 2015. [DOI: 10.1136/jnnp-2015-312379.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
ObjectivesTo evaluate long-term Brain Volume Loss (BVL) in patients who received fingolimod 0.5 mg or placebo in the FREEDOMS or FREEDOMS-2, and LONGTERMS studies. Methodspooled-analysis of patients who completed FREEDOMS and FREEDOMS-2 core studies and received at least one fingolimod-dose in LONGTERMS. We calculated the percent brain volume change (PBVC) and the mean annualized rate of brain atrophy (ARBA) at different time points using SIENA (Structural Image Evaluation using Normalization of Atrophy). Results up-to month (M)72 are presented for continuous-fingolimod 0.5 mg patient group and for placebo-fingolimod patient groupResults2355 patients (fingolimod 0.5 mg: 783, placebo-fingolimod: 773). Median exposure to fingolimod was 915(271–1689); 18.8% of patients had fingolimod-exposure for =2160 days (6 years). At M6,12,24,36, and 48, mean PBVC was –0.22 vs. –0.36; –0.44 vs. –0.63; –0.83 vs. –1.28; –1.22 vs. –1.73 and –1.61 vs. –2.16 for fingolimod 0.5 mg vs. placebo-fingolimod. Mean ARBA was –0.43 vs. –0.70; –0.45 vs. –0.64; –0.43 vs. –0.67; –0.41 vs. –0.59 and –0.43 vs. –0.58. Similar pattern observed at M60 and 72 (smaller patient numbers) for PBVC (–1.49 vs. – 2.41 and –1.58 vs. –2.99) and ARBA (–0.31 vs. –0.51 and –0.27 vs. –0.52). Long–term treatment with fingolimod 0.5mg is attended by sustained low rates of BVL upto–6 years. Patients switching from placebo to fingolimod did not catch-up regarding BVL.
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Papazachariadis O, Cappiello L, Carbè K, Ferraina S. S7.2 Single unit activity, multi unit activity and local field potential in macaque's motor cortex are modulated by median nerve stimulation. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60060-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Iannone A, Petroni A, Murru E, Cordeddu L, Carta G, Melis MP, Bergamini S, Casa LD, Cappiello L, Carissimi R, O'Shea M, Bell D, De Santis E, Banni S. Impairment of 8-iso-PGF(2ALPHA) isoprostane metabolism by dietary conjugated linoleic acid (CLA). Prostaglandins Leukot Essent Fatty Acids 2009; 80:279-87. [PMID: 19403295 DOI: 10.1016/j.plefa.2009.02.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [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] [Received: 10/07/2008] [Revised: 02/12/2009] [Accepted: 02/27/2009] [Indexed: 11/17/2022]
Abstract
8-iso-PGF(2alpha) isoprostane (IP) is one of the most-used markers of lipid peroxidation in experimental models and humans. After its formation, it is promptly metabolized to 2,3 dinor (DIN) in peroxisomes. Conjugated linoleic acid (CLA) is preferentially beta-oxidized in peroxisomes which may compete with IP, and thereby may affect its metabolism. In order to verify whether CLA is able to influence IP formation and/or metabolism and to explain the mechanism, we challenged rats supplemented with CLA or with triolein (as a control fatty acid), with a single dose of carbon tetrachloride (CCl(4)) or of bacterial lipopolysaccharide (LPS). The results showed that IP and its precursor arachidonic acid hydroperoxide, as well as malondialdehyde (MDA), increase significantly in the liver of rats challenged with CCl(4), irrespective of the diet, while in LPS-treated rats only nitrites in liver and isoprostane in plasma increase. On the other hand, the peroxisomal beta-oxidation products of IP, the DIN, is significantly lower in the CLA group with respect to control and triolein groups. To further investigate whether this is due to competition between CLA and IP at the cellular level, we incubated human fibroblasts from healthy subjects or patients with adrenoleukodystrophy (ALD), with CLA and/or commercially available IP. The rationale of this approach is based on the deficient peroxisomal beta-oxidation of fibroblasts from ALD patients, leading to a reduced formation of DIN. In both normal and ALD cells, the presence of CLA significantly inhibits the formation of DIN from IP. We may conclude that both in vitro and in vivo studies strongly suggest that CLA may impair IP catabolism in peroxisomes. Consequently an increase of IP, as a sole result of CLA intake, cannot be considered as a marker of lipid peroxidation.
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Affiliation(s)
- Anna Iannone
- Università degli Studi di Modena e Reggio Emilia, Dipartimento di Scienze Biomediche, Via Campi 287, 41100 Modena, Italy
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Abstract
Though pitted keratolysis of the foot is generally viewed to be caused by bacteria, there is confusion regarding the identity of the causative organism. Species of Corynebacterium, Actinomyces, Dermatophilus, and Micrococcus have been proposed by various investigators. We have studied eight cases of pitted keratolysis and have cultured an organism identified as Micrococcus sedentarius on the basis of colonial morphology, micromorphology, biochemical reactions, and chemical analysis of whole-cell components. Furthermore, pitted keratolysis was produced experimentally in a human volunteer by applying M sedentarius under an occlusive dressing onto the surface of the heel.
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Affiliation(s)
- K M Nordstrom
- Department of Dermatology, University of Pennsylvania School of Medicine, Philadelphia 19104
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Maltzman BA, Haupt EJ, Cappiello L, Cinotti DJ. Anterior chamber implants and postoperative astigmatism. CLAO J 1986; 12:32-5. [PMID: 3948381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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