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Lopes TPEG, Dias RB, Pernini S, Fontenelle C, Mannarino P, Maiolino A, Campos ASCP, Pereira TL, Farina M, Bonfim DC. EFEITO INSTRUCIONAL DE TOPOGRAFIAS MICROMOLDADAS PARA EXPANSÃO IN VITRO DE CÉLULAS TRONCO ESQUELÉTICAS E PROGENITORES DA MEDULA ÓSSEA HUMANA. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.539] [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: 11/11/2022] Open
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2
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Kockerols C, Dulucq S, Bernardi S, Farina M, Civettini I, Colafigli G, Mori S, Valk P, Mahon FX, Gambacorti-Passerini C, Nicolini FE, Breccia M, Russo D, Westerweel PE. S157: BCR::ABL1 DIGITAL PCR IDENTIFIES CHRONIC PHASE CML PATIENTS SUITABLE FOR AN EARLY TKI DISCONTINUATION ATTEMPT: A PATIENT-LEVEL META-ANALYSIS. Hemasphere 2022. [DOI: 10.1097/01.hs9.0000843520.97381.7b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Dente M, Riccardo F, Declich S, Milano A, Robbiati C, Agrimi U, Mantovani A, Morabito S, Scavia G, Cubadda F, Villa L, Monaco M, Mancini L, Carere M, Marcheggiani S, Lavazza A, Farina M, Dar O, Villa M, Coggi PT, Brusaferro S. Strengthening preparedness against global health threats: A paradigm shift based on One Health approaches. One Health 2022; 14:100396. [PMID: 35686149 PMCID: PMC9171516 DOI: 10.1016/j.onehlt.2022.100396] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 11/25/2022] Open
Abstract
The implementation of preparedness strategies to prevent and mitigate the impact of global health threats poses several challenges. It should promptly identify cross-cutting drivers of pandemic threats, assess context-specific risks, engage multiple stakeholders, and translate complex data from multiple sources into accessible information for action. This requires a coordinated, multidisciplinary and multisectoral effort engaging systems that, most of the time, work in isolation. The One Health (OH) approach promotes the collaboration and communication among different disciplines and sectors, and could be applied across the preparedness phases at national and international level. We discuss here gaps and needs in preparedness strategies, which can benefit from the OH approach, and a set of actionable recommendations, as shared with the G20–2021 with a dedicated Policy Brief. The discussion adds to the current debate about OH operationalization and promotes a paradigm shift towards coordinated prevention and preparedness strategies for early assessment and management of global health threats.
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Longuinho M, Ramnarain V, Ortiz Peña N, Ihiawakrim D, Soria-Martínez R, Farina M, Ersen O, Rossi AL. The influence of L-aspartic acid on calcium carbonate nucleation and growth revealed by in situ liquid phase TEM. CrystEngComm 2022. [DOI: 10.1039/d2ce00117a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ transmission electron microscopy has permitted the study of nanomaterials in liquid environments with high spatial and temporal resolutions, allowing chemical reaction visualization in real time. The aim of...
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Baaziz W, Ghica C, Cypriano J, Abreu F, Anselme K, Ersen O, Farina M, Werckmann J. New Phenotype and Mineralization of Biogenic Iron Oxide in Magnetotactic Bacteria. Nanomaterials (Basel) 2021; 11:nano11123189. [PMID: 34947538 PMCID: PMC8706698 DOI: 10.3390/nano11123189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/15/2022]
Abstract
Many magnetotactic bacteria (MTB) biomineralize magnetite crystals that nucleate and grow inside intracellular membranous vesicles originating from invaginations of the cytoplasmic membrane. The crystals together with their surrounding membranes are referred to as magnetosomes. Magnetosome magnetite crystals nucleate and grow using iron transported inside the vesicle by specific proteins. Here, we tackle the question of the organization of magnetosomes, which are always described as constituted by linear chains of nanocrystals. In addition, it is commonly accepted that the iron oxide nanocrystals are in the magnetite-based phase. We show, in the case of a wild species of coccus-type bacterium, that there is a double organization of the magnetosomes, relatively perpendicular to each other, and that the nanocrystals are in fact maghemite. These findings were obtained, respectively, by using electron tomography of whole mounts of cells directly from the environment and high-resolution transmission electron microscopy and diffraction. Structure simulations were performed with the MacTempas software. This study opens new perspectives on the diversity of phenotypes within MTBs and allows to envisage other mechanisms of nucleation and formation of biogenic iron oxide crystals.
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Affiliation(s)
- Walid Baaziz
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess BP 43, CEDEX 2, 67034 Strasbourg, France; (W.B.); (O.E.)
| | - Corneliu Ghica
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
- Correspondence: (C.G.); (J.W.)
| | - Jefferson Cypriano
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho, 373, CCS, UFRJ, Rio de Janeiro 21941-902, Brazil; (J.C.); (F.A.)
| | - Fernanda Abreu
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho, 373, CCS, UFRJ, Rio de Janeiro 21941-902, Brazil; (J.C.); (F.A.)
| | - Karine Anselme
- Institut de Science des Matériaux de Mulhouse, University of Haute Alsace, 68057 Mulhouse, France;
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess BP 43, CEDEX 2, 67034 Strasbourg, France; (W.B.); (O.E.)
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil;
| | - Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil;
- Centro Brasiliero de Pesquisas Fisicas, LABNANO, Rio de Janeiro 22290-180, Brazil
- Correspondence: (C.G.); (J.W.)
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Keim CN, da Silva DM, de Melo RD, Acosta-Avalos D, Farina M, de Barros HL. Swimming behavior of the multicellular magnetotactic prokaryote 'Candidatus Magnetoglobus multicellularis' near solid boundaries and natural magnetic grains. Antonie Van Leeuwenhoek 2021; 114:1899-1913. [PMID: 34478018 DOI: 10.1007/s10482-021-01649-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/19/2021] [Accepted: 08/24/2021] [Indexed: 11/26/2022]
Abstract
The magnetotactic yet uncultured species 'Candidatus Magnetoglobus multicellularis' is a spherical, multicellular ensemble of bacterial cells able to align along magnetic field lines while swimming propelled by flagella. Magnetotaxis is due to intracytoplasmic, membrane-bound magnetic crystals called magnetosomes. The net magnetic moment of magnetosomes interacts with local magnetic fields, imparting the whole microorganism a torque. Previous works investigated 'Ca. M. multicellularis' behavior when free swimming in water; however, they occur in sediments where bumping into solid particles must be routine. In this work, we investigate the swimming trajectories of 'Ca. M. multicellularis' close to solid boundaries using video microscopy. We applied magnetic fields 0.25-8.0 mT parallel to the optical axis of a light microscope, such that microorganisms were driven upwards towards a coverslip. Because their swimming trajectories approach cylindrical helixes, circular profiles would be expected. Nevertheless, at fields 0.25-1.1 mT, most trajectory projections were roughly sinusoidal, and net movements were approximately perpendicular to applied magnetic fields. Closed loops appeared in some trajectory projections at 1.1 mT, which could indicate a transition to the loopy profiles observed at magnetic fields ≥ 2.15 mT. The behavior of 'Ca. M. multicellularis' near natural magnetic grains showed that they were temporarily trapped by the particle's magnetic field but could reverse the direction of movement to flee away. Our results show that interactions of 'Ca. M. multicellularis with solid boundaries and magnetic grains are complex and possibly involve mechano-taxis.
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Affiliation(s)
- Carolina N Keim
- Instituto de Microbiologia Paulo de Góes, CCS, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Daniel Mendes da Silva
- Instituto de Microbiologia Paulo de Góes, CCS, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Roger Duarte de Melo
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
| | - Daniel Acosta-Avalos
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Henrique Lins de Barros
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
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Dias RB, Eirado TP, Shiefer M, Fontenelle C, Mannarino P, Saraiva A, Peixoto LP, Almeida MF, Rossi MID, Farina M, Bonfim DC. THE FREQUENCY OF PDPN+ CD146- HUMAN SKELETAL STEM CELLS AND ITS PROGENY VARIES IN ADULT BONES OF DIFFERENT ANATOMICAL LOCATIONS. Cytotherapy 2021. [DOI: 10.1016/j.jcyt.2021.02.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Martinez-Zelaya VR, Archilha NL, Calasans-Maia M, Farina M, Rossi AM. Trabecular architecture during the healing process of a tibial diaphysis defect. Acta Biomater 2021; 120:181-193. [PMID: 32860947 DOI: 10.1016/j.actbio.2020.08.028] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/16/2020] [Accepted: 08/19/2020] [Indexed: 01/08/2023]
Abstract
The adaptation of trabecular bone microstructure to mechanical loads has been intensively investigated. However, loading-unrelated aspects of trabecular architecture remain unclear. We used synchrotron radiation-based X-ray microtomography to study the 3D microarchitecture of newly formed trabecular tissue in a defect produced in the cortical region of the rat tibia diaphysis, in the absence (7, 14, and 21 days) or the presence (21 days) of carbonated hydroxyapatite/alginate (cHA) microspheres. This work provides the first evidence that the woven bone trabecular network, formed during the healing process, displays a well-organized 3D microarchitecture consisting of nodes with 3 (3-N), 4 (4-N) and 5 (5-N) connecting trabeculae, with a mean relative abundance of (3-N)/(4-N)/(5-N) = 66/24/7, for the analyzed periods. The measured inter-trabecular angles (ITA) distribution presented a Gaussian profile, with mean value at 115° for 3-N nodes, and 105° for 4-N nodes, close to the angles of idealized 3D regular structures (120° and 109.5°, respectively). Changes in the dispersion of ITA distribution suggested that a highly symmetric trabecular fabric organized under tensegrity principles is formed early during the bone healing process. Post-implantation, cHA disaggregated into multiple fragments (~20-400 μm), stimulating osteoconduction and bone growth toward the interior of the medullary cavity. The presence of biomaterials in bone defects affected the trabecular dimensions; however, it did not interfere with the formation of geometrical motifs with topological parameters similar to those found in the sham-defects. STATEMENT OF SIGNIFICANCE: The trabecular bone microstructure enables the tissue to meet the necessary mechanical and functional demands. However, the process of trabecular microarchitecture formation during healing, in the absence or presence of a bone graft, is not yet well understood. This work demonstrated that, from the beginning of its formation in cortical bone defects, the woven-bone trabecular network is spatially organized according to the principle of tensegrity. This microarchitecture is comprised of highly symmetric geometric motifs and is an intrinsic characteristic of trabecular growth, regardless of hierarchical scale or mechanical stimulation. The addition of a biodegradable nanostructured calcium phosphate graft did not disrupt trabecular microarchitecture; however, graft biodegradation should be controlled to optimize the reproduction of intrinsic trabecular motifs throughout the defect.
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Affiliation(s)
- Victor R Martinez-Zelaya
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Zip Code 13083-970 Campinas, Sao Paulo, Brazil; Department of Condensed Matter, Applied Physics and Nanoscience, Brazilian Center for Research in Physics, Zip Code 22290-180 Rio de Janeiro, RJ, Brazil.
| | - Nathaly L Archilha
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Zip Code 13083-970 Campinas, Sao Paulo, Brazil
| | - Mônica Calasans-Maia
- Oral Surgery Department, Fluminense Federal University, Zip Code 24020-140 Niterói, RJ, Brazil
| | - Marcos Farina
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Zip Code 21941-902 Rio de Janeiro, RJ, Brazil
| | - Alexandre M Rossi
- Department of Condensed Matter, Applied Physics and Nanoscience, Brazilian Center for Research in Physics, Zip Code 22290-180 Rio de Janeiro, RJ, Brazil.
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Farina M, Werckmann J, Campos APC, Mendoza ME, Wendt C, Almeida FP, Rougerie P, Rossi A, Bouillet C, Ersen O. Nanometer scale insight on the analysis of limpets mineralized teeth: Special focus on the silica-containing regions. J Struct Biol 2020; 213:107693. [PMID: 33387655 DOI: 10.1016/j.jsb.2020.107693] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/23/2020] [Accepted: 12/25/2020] [Indexed: 10/22/2022]
Abstract
We report the electron microscopy-based analysis of the major lateral tooth of the limpet Colisella subrugosa during early and intermediate stages of development. We aimed to analyze the structural relationship among the needle-like crystals of the iron oxide goethite, the amorphous silica phase that forms the tooth base and occupy inter-crystalline spaces in the cusp, and the chitin fibers of the matrix. Goethite crystals followed the three dimensional organization pattern of the chitin fibers in the cusp. In the tooth base, spherical individual silica granules were found in regions where the chitin fibers cross. The spherical granules near the interface between the tooth base and the cusp (junction zone) formed an almost continuous medium that could easily be ultrathin-sectioned for further analysis. By contrast, the nearby silica-rich region localized on the other side of the junction zone contained needle-like goethite crystals immersed in the matrix and presented a conchoidal fracture. The chitin fibers from the silica granules of the tooth base were dotted or undulating in projection with a periodicity of about 6 nm when observed by high magnification transmission electron microscopy. Very thin goethite crystals were present in the base of the cusp near the junction zone surrounded by silica. On several occasions, crystals presented internal thin straight white lines parallel to the major axis, indicating a possible growth around fibers. We propose that silica and iron oxide phases mineralization may occur simultaneously at least for some period and that silica moderates the dimensions of the iron oxide crystals.
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Affiliation(s)
- Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, Brazil.
| | - Jacques Werckmann
- Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
| | - Andrea P C Campos
- Aix Marseille Univ, CNRS, Centrale Marseille, FSCM (FR1739), CP2M, 13397 Marseille, France
| | - Martin E Mendoza
- Universidad Pedagógica y Tecnológica de Colombia, Avenida Central del Norte 39-115, P.O.Box 150001, Boyacá, Colombia
| | - Camila Wendt
- Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
| | - Fernando P Almeida
- Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pablo Rougerie
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, Brazil
| | - André Rossi
- Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
| | - Corinne Bouillet
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
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Chor A, Gonçalves RP, Costa AM, Farina M, Ponche A, Sirelli L, Schrodj G, Gree S, de Andrade LR, Anselme K, Dias ML. In Vitro Degradation of Electrospun Poly(Lactic-Co-Glycolic Acid) (PLGA) for Oral Mucosa Regeneration. Polymers (Basel) 2020; 12:polym12081853. [PMID: 32824776 PMCID: PMC7465081 DOI: 10.3390/polym12081853] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 07/04/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) has been used in the field of tissue engineering as a scaffold due to its good biocompatibility, biodegradability and mechanical strength. With the aim to explore the degradability of PLGA electrospun nonwoven structures for oral mucosa tissue engineering applications, non-irradiated and gamma irradiated nonwovens were immersed in three different solutions, in which simulated body fluid (SBF) and artificial saliva are important for future oral mucosa tissue engineering. The nonwovens were immersed for 7, 15 and 30 days in SBF, culture media (DMEM) and artificial saliva at 37 °C. Before immersion in the solutions, the dosage of 15 kGy was applied for sterilization in one assay and compared with non-irradiated samples at the same timepoints. Samples were characterized using different techniques such as scanning electron microscopy (SEM), differential scanning calorimetric (DSC) and gel permeation chromatography (GPC) to evaluate the nonwoven degradation and Fourier-transform infrared spectroscopy (FTIR) to evaluate the chain scissions. Our results showed that PLGA nonwovens were constituted by semicrystalline fibers with moderate degradation properties up to thirty days. The non-irradiated samples exhibited slower kinetics of degradation than irradiated nonwovens. For immersion times longer than 7 days in the three different solutions, the mean diameter of irradiated fibers stayed in the same range, but significantly different from the control sample. On non-irradiated samples, the degradation kinetics was slower and the plateau in the diameter value was only attained after 30 days of immersion in the fluids. Plasticization (fluid absorption into the fiber structure) occurred in the bulk material, as confirmed by a decrease in Tg observed by DSC analyses of non-irradiated and irradiated nonwovens, in comparison with the respective controls. In addition, artificial saliva showed a higher capacity of influencing PLGA crystallization than SBF and DMEM. FTIR analyses showed typical PLGA chemical functional groups changes. These results will be important for future application of those PLGA electrospun nonwovens for oral mucosa regeneration.
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Affiliation(s)
- Ana Chor
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Raquel Pires Gonçalves
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
| | - Andrea Machado Costa
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Marcos Farina
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Arnaud Ponche
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Lys Sirelli
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
| | - Gautier Schrodj
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Simon Gree
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Leonardo Rodrigues de Andrade
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Karine Anselme
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Marcos Lopes Dias
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
- Correspondence:
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11
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Bernardi S, Zanaglio C, Farina M, Polverelli N, Malagola M, Russo D. dsDNA from extracellular vesicles (EVs) in adult AML. Ann Hematol 2020; 100:1355-1356. [PMID: 32474620 PMCID: PMC8043941 DOI: 10.1007/s00277-020-04109-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 05/27/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Simona Bernardi
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy. .,CREA Laboratory (Centro di Ricerca Emato-Oncologica AIL), ASST Spedali Civili di Brescia, 25123, Brescia, Italy.
| | - C Zanaglio
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy.,CREA Laboratory (Centro di Ricerca Emato-Oncologica AIL), ASST Spedali Civili di Brescia, 25123, Brescia, Italy
| | - M Farina
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy
| | - N Polverelli
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy
| | - M Malagola
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy
| | - D Russo
- Unit of Blood Diseases and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, ASST Spedali Civili di Brescia, University of Brescia, 25123, Brescia, Italy
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12
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Soares J, Araujo GRDS, Santana C, Matias D, Moura-Neto V, Farina M, Frases S, Viana NB, Romão L, Nussenzveig HM, Pontes B. Membrane Elastic Properties During Neural Precursor Cell Differentiation. Cells 2020; 9:E1323. [PMID: 32466390 PMCID: PMC7349228 DOI: 10.3390/cells9061323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 04/03/2020] [Revised: 05/15/2020] [Accepted: 05/17/2020] [Indexed: 02/08/2023] Open
Abstract
Neural precursor cells differentiate into several cell types that display distinct functions. However, little is known about how cell surface mechanics vary during the differentiation process. Here, by precisely measuring membrane tension and bending modulus, we map their variations and correlate them with changes in neural precursor cell morphology along their distinct differentiation fates. Both cells maintained in culture as neural precursors as well as those plated in neurobasal medium reveal a decrease in membrane tension over the first hours of culture followed by stabilization, with no change in bending modulus. During astrocyte differentiation, membrane tension initially decreases and then increases after 72 h, accompanied by consolidation of glial fibrillary acidic protein expression and striking actin reorganization, while bending modulus increases following observed alterations. For oligodendrocytes, the changes in membrane tension are less abrupt over the first hours, but their values subsequently decrease, correlating with a shift from oligodendrocyte marker O4 to myelin basic protein expressions and a remarkable actin reorganization, while bending modulus remains constant. Oligodendrocytes at later differentiation stages show membrane vesicles with similar membrane tension but higher bending modulus as compared to the cell surface. Altogether, our results display an entire spectrum of how membrane elastic properties are varying, thus contributing to a better understanding of neural differentiation from a mechanobiological perspective.
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Affiliation(s)
- Juliana Soares
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
- Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;
| | - Glauber R. de S. Araujo
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (G.R.d.S.A.); (S.F.)
| | - Cintia Santana
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
| | - Diana Matias
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde, Rio de Janeiro, RJ 20231-092, Brazil
| | - Vivaldo Moura-Neto
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde, Rio de Janeiro, RJ 20231-092, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
| | - Susana Frases
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (G.R.d.S.A.); (S.F.)
| | - Nathan B. Viana
- Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;
- Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-942, Brazil
| | - Luciana Romão
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
| | - H. Moysés Nussenzveig
- Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;
- Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-942, Brazil
| | - Bruno Pontes
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; (J.S.); (C.S.); (D.M.); (V.M.-N.); (M.F.); (L.R.)
- Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;
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13
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Cypriano J, Bahri M, Dembelé K, Baaziz W, Leão P, Bazylinski DA, Abreu F, Ersen O, Farina M, Werckmann J. Insight on thermal stability of magnetite magnetosomes: implications for the fossil record and biotechnology. Sci Rep 2020; 10:6706. [PMID: 32317676 PMCID: PMC7174351 DOI: 10.1038/s41598-020-63531-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 07/30/2019] [Accepted: 03/25/2020] [Indexed: 11/14/2022] Open
Abstract
Magnetosomes are intracellular magnetic nanocrystals composed of magnetite (Fe3O4) or greigite (Fe3S4), enveloped by a lipid bilayer membrane, produced by magnetotactic bacteria. Because of the stability of these structures in certain environments after cell death and lysis, magnetosome magnetite crystals contribute to the magnetization of sediments as well as providing a fossil record of ancient microbial ecosystems. The persistence or changes of the chemical and magnetic features of magnetosomes under certain conditions in different environments are important factors in biotechnology and paleomagnetism. Here we evaluated the thermal stability of magnetosomes in a temperature range between 150 and 500 °C subjected to oxidizing conditions by using in situ scanning transmission electron microscopy. Results showed that magnetosomes are stable and structurally and chemically unaffected at temperatures up to 300 °C. Interestingly, the membrane of magnetosomes was still observable after heating the samples to 300 °C. When heated between 300 °C and 500 °C cavity formation in the crystals was observed most probably associated to the partial transformation of magnetite into maghemite due to the Kirkendall effect at the nanoscale. This study provides some insight into the stability of magnetosomes in specific environments over geological periods and offers novel tools to investigate biogenic nanomaterials.
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Affiliation(s)
- Jefferson Cypriano
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Kassiogé Dembelé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Inorganic Chemistry, Faradayweg 4-6, 14195, Berlin, Germany
| | - Walid Baaziz
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Pedro Leão
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Dennis A Bazylinski
- School of Life Sciences, University of Nevada at Las Vegas, Las Vegas, 89154-4004, USA
| | - Fernanda Abreu
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil. .,Centro Brasileiro de Pesquisas Físicas, LABNANO, rua Xavier Sigaud, 150, CEP, 22290-180, Rio de Janeiro, Brazil.
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14
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Capobianco G, Mantegna S, Farina M, Gallo O, Pini C, Tinacci E, Cherchi P, Dessole S. Saline infusion sonography: technique, advantages and limits for the study of uterus and fallopian tubes. Review and care pathway. CLIN EXP OBSTET GYN 2019. [DOI: 10.12891/ceog4766.2019] [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: 11/01/2022]
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15
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Hill LJ, Paradas WC, Willemes MJ, Pereira MG, Salomon PS, Mariath R, Moura RL, Atella GC, Farina M, Amado-Filho GM, Salgado LT. Acidification-induced cellular changes in Symbiodinium isolated from Mussismilia braziliensis. PLoS One 2019; 14:e0220130. [PMID: 31381568 PMCID: PMC6681953 DOI: 10.1371/journal.pone.0220130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/09/2019] [Indexed: 01/27/2023] Open
Abstract
Dinoflagellates from the Symbiodiniaceae family and corals have an ecologically important endosymbiotic relationship. Scleractinian corals cannot survive for long periods without their symbionts. These algae, also known as zooxanthellae, on the other hand, thrives outside the coral cells. The free-living populations of zooxanthellae are essential for the resilience of the coral to environmental stressors such as temperature anomalies and ocean acidification. Yet, little is known about how ocean acidification may affect the free-living zooxanthellae. In this study we aimed to test morphological, physiological and biochemical responses of zooxanthellae from the Symbiodinium genus isolated from the coral Mussismilia braziliensis, endemic to the Brazilian coast, to acidification led by increased atmospheric CO2. We tested whether photosynthetic yield, cell ultrastructure, cell density and lipid profile would change after up to 16 days of exposure to pH 7.5 in an atmospheric pCO2 of 1633 μatm. Photosynthetic yield and cell density were negatively affected and chloroplasts showed vesiculated thylakoids, indicating morphological damage. Moreover, Symbiodinium fatty acid profile drastically changed in acidified condition, showing lower polyunsaturated fatty acids and higher saturated fatty acids contents, when compared to the control, non-acidified condition. These results show that seawater acidification as an only stressor causes significant changes in the physiology, biochemistry and ultrastructure of free-living Symbiodinium.
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Affiliation(s)
- Lilian J Hill
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Wladimir C Paradas
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria Julia Willemes
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Miria G Pereira
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Paulo S Salomon
- Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Rodrigo Mariath
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo L Moura
- Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Georgia C Atella
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Gilberto M Amado-Filho
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leonardo T Salgado
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
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16
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Turra A, Polverelli N, Corvini F, Morello E, Malagola M, Arena F, Andreoli M, Bertulli A, Farina M, Cattina F, Rambaldi B, Gandolfi L, Zollner T, Buttini EA, Bernardi S, Zanaglio C, Foroni C, Re F, Russo D. PS1540 MULTIPARAMETRIC PREDICTIVE SCORE FOR GRAFT VERSUS HOST DISEASE (GVHD) IN PATIENTS SUBMITTED TO ALLOGENEIC STEM CELLS TRANSPLANTATION (SCT). Hemasphere 2019. [DOI: 10.1097/01.hs9.0000564420.21353.ad] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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17
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Cypriano J, Werckmann J, Vargas G, Lopes dos Santos A, Silva KT, Leão P, Almeida FP, Bazylinski DA, Farina M, Lins U, Abreu F. Uptake and persistence of bacterial magnetite magnetosomes in a mammalian cell line: Implications for medical and biotechnological applications. PLoS One 2019; 14:e0215657. [PMID: 31013301 PMCID: PMC6478323 DOI: 10.1371/journal.pone.0215657] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/07/2019] [Indexed: 01/29/2023] Open
Abstract
Magnetotactic bacteria biomineralize intracellular magnetic nanocrystals surrounded by a lipid bilayer called magnetosomes. Due to their unique characteristics, magnetite magnetosomes are promising tools in Biomedicine. However, the uptake, persistence, and accumulation of magnetosomes within mammalian cells have not been well studied. Here, the endocytic pathway of magnetite magnetosomes and their effects on human cervix epithelial (HeLa) cells were studied by electron microscopy and high spatial resolution nano-analysis techniques. Transmission electron microscopy of HeLa cells after incubation with purified magnetosomes showed the presence of magnetic nanoparticles inside or outside endosomes within the cell, which suggests different modes of internalization, and that these structures persisted beyond 120 h after internalization. High-resolution transmission electron microscopy and electron energy loss spectra of internalized magnetosome crystals showed no structural or chemical changes in these structures. Although crystal morphology was preserved, iron oxide crystalline particles of approximately 5 nm near internalized magnetosomes suggests that minor degradation of the original mineral structures might occur. Cytotoxicity and microscopy analysis showed that magnetosomes did not result in any apparent effect on HeLa cells viability or morphology. Based on our results, magnetosomes have significant biocompatibility with mammalian cells and thus have great potential in medical, biotechnological applications.
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Affiliation(s)
- Jefferson Cypriano
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil
| | - Gabriele Vargas
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana Lopes dos Santos
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Asian School of the Environment, Nanyang Technological University, Singapore, Singapore
| | - Karen T. Silva
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro Leão
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernando P. Almeida
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Dennis A. Bazylinski
- School of life Sciences, University of Nevada at Las Vegas, Las Vegas, Nevada, United States of America
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ulysses Lins
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda Abreu
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
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18
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Baccini A, Walker W, Carvalho L, Farina M, Houghton RA. Response to Comment on "Tropical forests are a net carbon source based on aboveground measurements of gain and loss". Science 2019; 363:363/6423/eaat1205. [PMID: 30630897 DOI: 10.1126/science.aat1205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 11/08/2018] [Indexed: 11/02/2022]
Abstract
The Hansen et al critique centers on the lack of spatial agreement between two very different datasets. Nonetheless, properly constructed comparisons designed to reconcile the two datasets yield up to 90% agreement (e.g., in South America).
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Affiliation(s)
- A Baccini
- Woods Hole Research Center, Falmouth, MA 04523, USA.
| | - W Walker
- Woods Hole Research Center, Falmouth, MA 04523, USA
| | - L Carvalho
- Department of Mathematics and Statistics, Boston University, Boston, MA, USA
| | - M Farina
- Woods Hole Research Center, Falmouth, MA 04523, USA
| | - R A Houghton
- Woods Hole Research Center, Falmouth, MA 04523, USA
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Affiliation(s)
- M D Hayward
- University of Texas at Austin, Austin, Texas, United States
| | - M Farina
- University of Texas at Austin, Austin, TX, USA
| | - D A Wolf
- Syracuse University, Syracuse, NY
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20
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Umberson D, Donnelly RE, Farina M. RACE, LIFE COURSE EXPOSURE TO DEATH OF A FAMILY MEMBER, AND HEALTH. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D Umberson
- The University of Texas-Austinfe, Austin, Texas, United States
| | - R E Donnelly
- Population Research Center, University of Texas at Austi, Austin, TX, USA
| | - M Farina
- Population Research Center, University of Texas at Austi, Austin, TX, USA
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21
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Lombardi G, de Salvo G, Rudà R, Franceschi E, Eoli M, Faedi M, Pace A, Lolli I, Rizzato S, Germano D, Pasqualetti F, Farina M, Magni G, Bellu L, Caccese M, Pambuku A, Bergo E, Indraccolo S, Gardiman M, Soffietti R, Zagonel V. OS2.3 Updated results of REGOMA: A randomized, multicenter, controlled open-label phase II clinical trial evaluating regorafenib in relapsed glioblastoma <GBM> patients <PTS>. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- G Lombardi
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - G de Salvo
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - R Rudà
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - E Franceschi
- Department of Medical Oncology, Bellaria Hospital, Azienda USL - IRCCS Institute of Neurological Science, Bologna, Italy
| | - M Eoli
- Fondazione IRCCS Istituto Besta, Milano, Italy
| | - M Faedi
- Department of Medical Oncology, IRST - IRCCS, Meldola, Italy
| | - A Pace
- Neuroncology Unit, IFO, Roma, Italy
| | - I Lolli
- Medical Oncology Unit, IRCCS “Saverio de Bellis”, Castellana Grotte, Italy
| | - S Rizzato
- Department of Oncology, Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - D Germano
- Medical Oncology Unit, Azienda Ospedaliera “G. Rummo”, Benevento, Italy
| | - F Pasqualetti
- Department of Radiotherapy, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - M Farina
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - G Magni
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - L Bellu
- Radiotherapy Unit, IOV-IRCCS, Padova, Italy
| | - M Caccese
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - A Pambuku
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - E Bergo
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - S Indraccolo
- Immunology and Molecular Oncology Unit, IOV-IRCCS, Padova, Italy
| | - M Gardiman
- Unità Anatomia Patologica, Azienda-Università di Padova, Padova, Italy
| | - R Soffietti
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - V Zagonel
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
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22
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Keim CN, Duarte de Melo R, Almeida FP, Lins de Barros HGP, Farina M, Acosta-Avalos D. Effect of applied magnetic fields on motility and magnetotaxis in the uncultured magnetotactic multicellular prokaryote 'Candidatus Magnetoglobus multicellularis'. Environ Microbiol Rep 2018; 10:465-474. [PMID: 29573371 DOI: 10.1111/1758-2229.12640] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 02/27/2018] [Accepted: 03/13/2018] [Indexed: 06/08/2023]
Abstract
Magnetotactic bacteria are found in the chemocline of aquatic environments worldwide. They produce nanoparticles of magnetic minerals arranged in chains in the cytoplasm, which enable these microorganisms to align to magnetic fields while swimming propelled by flagella. Magnetotactic bacteria are diverse phylogenetically and morphologically, including cocci, rods, vibria, spirilla and also multicellular forms, known as magnetotactic multicellular prokaryotes (MMPs). We used video-microscopy to study the motility of the uncultured MMP 'Candidatus Magnetoglobus multicellularis' under applied magnetic fields ranging from 0.9 to 32 Oersted (Oe). The bidimensional projections of the tridimensional trajectories where interpreted as plane projections of cylindrical helices and fitted as sinusoidal curves. The results showed that 'Ca. M. multicellularis' do not orient efficiently to low magnetic fields, reaching an efficiency of about 0.65 at 0.9-1.5 Oe, which are four to six times the local magnetic field. Good efficiency (0.95) is accomplished for magnetic fields ≥10 Oe. For comparison, unicellular magnetotactic microorganisms reach such efficiency at the local magnetic field. Considering that the magnetic moment of 'Ca. M. multicellularis' is sufficient for efficient alignment at the Earth's magnetic field, we suggest that misalignments are due to flagella movements, which could be driven by photo-, chemo- and/or other types of taxis.
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Affiliation(s)
- Carolina N Keim
- Instituto de Microbiologia Paulo de Góes, CCS, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Roger Duarte de Melo
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
| | - Fernando P Almeida
- Instituto de Microbiologia Paulo de Góes, CCS, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Henrique G P Lins de Barros
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro, 21941-902, Brazil
| | - Daniel Acosta-Avalos
- Centro Brasileiro de Pesquisas Físicas - CBPF, Rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
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23
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Galeoto G, Sili A, Tamburlani M, Farina M, Mannocci A, Mollica R, Servadio A. [Construction and validation of a tool for the evaluation of environmental risks and limitations to the manual handling of loads: cross-sectional study]. Clin Ter 2018; 168:e349-e356. [PMID: 29209683 DOI: 10.7417/t.2017.2033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
INTRODUCTION The manual handling of loads has a strong impact on many types of work. All health professionals, due to their job, are subjected to a high risk of disease from the manual handling of loads. TARGET The purpose of our work has been therefore the construction and the validation of a specific tool for the evaluation of both environmental risks and individual limitations of the manual handling of loads / patients. MATERIALS AND METHODS The questionnaire we created is composed of two main sections: the first section includes the registry card of the operator personal data while the second section, consisting of eleven items it is further organized into two sections/parts. The first part consists of four items about environmental risk factors, while the second part consists of seven items about generic limitations and the assessment of pain from manual handling of loads. RESULTS The operators'health nurses, including those ones with a coordination responsibility, that are available in the structure are 704 while the response rate to the questionnaire was of 93.18%. The test-retest showed optimal values of the intra-class correlation coefficient (0.843) so demonstrating the absence of measurement errors in the two administrations. The values related to the internal consistency of the two sections of the questionnaire were greater than 0.80that also demonstrated the internal stability of the questionnaire. CONCLUSIONS The tool we described therefore is to be intended as a means of assessment for environmental risks, restrictions on movement of loads and pain associated with the task.
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Affiliation(s)
- G Galeoto
- Dipartimento di Sanità Pubblica e Malattie Infettive, "Sapienza" Università di Roma
| | - A Sili
- Policlinico Tor Vergata, Dipartimento delle Professioni Sanitarie, Roma
| | - M Tamburlani
- Università di Tor Vergata, Corso di Laurea Magistrale in Scienze Riabilitative delle Professioni Sanitarie, Roma
| | - M Farina
- Università di Tor Vergata, Corso di Laurea Magistrale in Scienze Riabilitative delle Professioni Sanitarie, Roma
| | - A Mannocci
- Dipartimento di Sanità Pubblica e Malattie Infettive, "Sapienza" Università di Roma
| | - R Mollica
- Dipartimento di Scienze Anatomiche, Istologiche, Medico Legali e dell'Apparato Locomotore, "Sapienza" Università di Roma, Italia
| | - A Servadio
- Policlinico Tor Vergata, Dipartimento delle Professioni Sanitarie, Roma
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24
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Abstract
Bioimpedance is a simple and non-invasive method of assessing body fluid composition. The aim of our study was to evaluate the reliability of impedance: a) to measure urea distribution volume considered to be coextensive with total body water (TBW); b) to assess the changes in body fluid compartments before and after dialysis; c) to predict hypotensive episodes. In twelve hemodialysis patients, TBW measured by bioelectrical impedance analysis (BIA) before a dialysis session was significantly correlated with the urea distribution volume estimated by dialysis direct quantification (r=0.64, p < 0.05) and with TBW calculated by the Watson equation (r=0.65, p < 0.05). Anthropometric values were, on average, 4.8% higher. TBW measured by BIA at the end of treatment overestimated fluid losses induced by ultrafiltration by 14% to 70%, while TBW 6 h after dialysis reflected the weight losses. On line BIA during hemodialysis has a very low positive predictive value (41.6%) and poor sensitivity (66%) for the prediction of hypotension. In conclusion, BIA is helpful in assessing the urea distribution volume but is not reliable for assessing acute fluid changes nor for predicting hypotensive episodes related to hemodialysis.
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Affiliation(s)
| | - M. Farina
- Renal Unit, Ospedale Maggiore, Lodi - Italy
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25
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de Carvalho RT, Rocha GM, Paradas WC, Soares AR, Ank Guarino G, Passos RMF, Amado Filho GM, Farina M, Salgado LT. Cell wall physicochemical properties determine the thallus biomineralization pattern of Padina gymnospora (Phaeophyceae). J Phycol 2017; 53:1294-1304. [PMID: 28990189 DOI: 10.1111/jpy.12596] [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: 09/20/2016] [Accepted: 08/24/2017] [Indexed: 06/07/2023]
Abstract
Approximately half of the Padina (Dictyotales, Phaeophyceae) species mineralize aragonite needles over the adaxial thallus surface, where mineral bands are interspersed with nonmineralized regions along the thallus from the apical to basal end. However, this calcification pattern and the related algal properties are not well understood. Therefore, this work was performed to elucidate a potential role of cell walls in the inhibition/induction of mineralization in the brown alga Padina gymnospora. In a comparison of specific thallus regions, differences were identified in the cellulose distribution, microfibrils arrangement and thickness, distribution and abundance of phenolic substances, and physical differences among the surfaces of the thallus (deformation, adhesion, topography, and nano-rugosity). In vitro mineralization assays indicated that phenolic substances are strong modulators of calcium carbonate crystals growth. In addition, de novo mineralization assays over cell wall surfaces that were used as templates, even without cellular activity, indicated that the cell wall remains a key factor in the induction/inhibition of mineralization. Overall, the current findings indicate a strong correlation between the physico-chemical and structural properties of the cell wall and the alternation pattern of the mineralization bands over the thallus of P. gymnospora.
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Affiliation(s)
| | - Gustavo Miranda Rocha
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Wladimir Costa Paradas
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, 22460-030, Brazil
| | - Angélica Ribeiro Soares
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Macaé, Rio de Janeiro, 27901-000, Brazil
| | - Gláucia Ank Guarino
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Niterói, Rio de Janeiro, 24001-970, Brazil
| | | | | | - Marcos Farina
- Laboratório de Biomineralização, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-902, Brazil
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Rossi AL, Longuinho MM, Tanaka MN, Farina M, Borojevic R, Rossi AM. Intracellular pathway and subsequent transformation of hydroxyapatite nanoparticles in the SAOS-2 osteoblast cell line. J Biomed Mater Res A 2017; 106:428-439. [DOI: 10.1002/jbm.a.36256] [Citation(s) in RCA: 10] [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] [Received: 07/28/2017] [Revised: 09/13/2017] [Accepted: 09/28/2017] [Indexed: 11/12/2022]
Affiliation(s)
- André L. Rossi
- Brazilian Center for Research in Physics; Rio de Janeiro 22290-180 Brazil
| | | | - Marcelo N. Tanaka
- Brazilian Center for Research in Physics; Rio de Janeiro 22290-180 Brazil
| | - Marcos Farina
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro; Rio de Janeiro 21941-590 Brazil
| | - Radovan Borojevic
- Faculty of Medicine-FASE; Center of Regenerative Medicine; Petrópolis 25680-120 Brazil
| | - Alexandre M. Rossi
- Brazilian Center for Research in Physics; Rio de Janeiro 22290-180 Brazil
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Baccini A, Walker W, Carvalho L, Farina M, Sulla-Menashe D, Houghton RA. Tropical forests are a net carbon source based on aboveground measurements of gain and loss. Science 2017; 358:230-234. [DOI: 10.1126/science.aam5962] [Citation(s) in RCA: 421] [Impact Index Per Article: 60.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 09/08/2017] [Indexed: 01/30/2023]
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Lombardi G, De Salvo G, Brandes A, Eoli M, Rudà R, Faedi M, Lolli I, Pace A, Rizzato S, Germano D, Pasqualetti F, Farina M, Magni G, Pambuku A, Bergo E, Cabrini G, Indraccolo S, Gardiman M, Zagonel V. REGOMA: A randomized, multicenter, controlled open-label phase II clinical trial evaluating regorafenib activity in relapsed glioblastoma patients. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx440.009] [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: 11/13/2022] Open
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Rieger DK, Dos Santos AA, Suñol C, Farina M. Involvement of superoxide in malaoxon-induced toxicity in primary cultures of cortical neurons. J Toxicol Environ Health A 2017; 80:1106-1115. [PMID: 28849997 DOI: 10.1080/15287394.2017.1357305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Organophosphorus compounds (OP) represent a class of insecticides that are used most globally. The neurotoxic effects are attributed mainly to acetylcholinesterase (AChE) enzyme inhibition, which is responsible for cholinergic manifestations in individuals acutely exposed to OP. However, AChE inhibition alone cannot account for the wide range of symptoms that were reported following OP exposures. In agreement with this, evidence shows that non-cholinergic events may be mechanistically linked to OP-induced neurotoxicity. The aim of this study was to investigate the potential occurrence of oxidative stress as a critical step in the toxicity induced by the OP malaoxon(MAL) using primary cultures of mouse cortical neurons, as well as to distinguish MAL-induced oxidative stress and cell toxicity from an action on AChE blockade. Primary cultures of mouse cortical neurons were treated with MAL (0.01; 0.1; 1; 10; or 100 µM) at varying time points (1, 3, 6, 24, 48, or 144 hr) and the following biochemical parameters determined including cell viability, AChE activity, and superoxide production. MAL significantly reduced cell viability in a concentration- and time-dependent manner. Of note, 1 µM MAL significantly inhibited (approximately 75%) AChE activity after 48 hr incubation. Pralidoxime (PRAL) (600 µM), a classical AChE reactivator, significantly protected against MAL-induced AChE blockade; however, PRAL did not affect MAL-mediated fall in cellular viability, indicating that AChE inhibition is not necessarily correlated with insecticide-induced decrease in cell survival. MAL-induced diminished cell viability was preceded by a significant increase in superoxide anion production. The antioxidant agent ascorbic acid (AA) (200 µM), which significantly protected against MAL-induced superoxide anion production, did not alter MAL-induced AChE inhibition and significantly prevented insecticide-mediated fall in cell survival. Data show that increased superoxide anion production is an event that precedes MAL-induced cell toxicity in primary cultures of mouse cortical neurons. Based on the preventative effects of AA against MAL-mediated superoxide anion production and reduced cell viability, evidence indicates that oxidative stress represents an important step mediating MAL-induced toxicity in neurons and that AChE inhibition is not necessarily correlated with lowered cell survival noted in insecticide-exposed cells.
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Affiliation(s)
- D K Rieger
- a Departamento de Bioquímica, Centro de Ciências Biológicas , Universidade Federal de Santa Catarina , Florianópolis , Santa Catarina , Brazil
| | - A A Dos Santos
- a Departamento de Bioquímica, Centro de Ciências Biológicas , Universidade Federal de Santa Catarina , Florianópolis , Santa Catarina , Brazil
| | - C Suñol
- b Institut d'Investigacions Biomèdiques de Barcelona , Consejo Superior de Investigaciones Científicas (IIBB-CSIC), IDIBAPS, CIBER Epidemiología y Salud Pública (CIBERESP) , Barcelona , Spain
| | - M Farina
- a Departamento de Bioquímica, Centro de Ciências Biológicas , Universidade Federal de Santa Catarina , Florianópolis , Santa Catarina , Brazil
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Werckmann J, Cypriano J, Lefèvre CT, Dembelé K, Ersen O, Bazylinski DA, Lins U, Farina M. Localized iron accumulation precedes nucleation and growth of magnetite crystals in magnetotactic bacteria. Sci Rep 2017; 7:8291. [PMID: 28811607 PMCID: PMC5557804 DOI: 10.1038/s41598-017-08994-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 03/06/2017] [Accepted: 07/14/2017] [Indexed: 12/16/2022] Open
Abstract
Many magnetotactic bacteria (MTB) biomineralize magnetite crystals that nucleate and grow inside intracellular membranous vesicles that originate from invaginations of the cytoplasmic membrane. The crystals together with their surrounding membranes are referred to magnetosomes. Magnetosome magnetite crystals nucleate and grow using iron transported inside the vesicle by specific proteins. Here we address the question: can iron transported inside MTB for the production of magnetite crystals be spatially mapped using electron microscopy? Cultured and uncultured MTB from brackish and freshwater lagoons were studied using analytical transmission electron microscopy in an attempt to answer this question. Scanning transmission electron microscopy was used at sub-nanometric resolution to determine the distribution of elements by implementing high sensitivity energy dispersive X-ray (EDS) mapping and electron energy loss spectroscopy (EELS). EDS mapping showed that magnetosomes are enmeshed in a magnetosomal matrix in which iron accumulates close to the magnetosome forming a continuous layer visually appearing as a corona. EELS, obtained at high spatial resolution, confirmed that iron was present close to and inside the lipid bilayer magnetosome membrane. This study provides important clues to magnetite formation in MTB through the discovery of a mechanism where iron ions accumulate prior to magnetite biomineralization.
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Affiliation(s)
- Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil.
| | - Jefferson Cypriano
- Instituto de Microbiologia, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Christopher T Lefèvre
- CNRS/CEA/Aix-Marseille Université, UMR7265 Institut de biosciences et biotechnologies, Laboratoire de Bioénergétique Cellulaire, 13108, Saint Paul lez Durance, France
| | - Kassiogé Dembelé
- Institut de physique et chimie des matériaux de Strasbourg (IPCMS) UMR 7504 CNRS 23 rue du Lœss, BP 43 67034, Strasbourg Cedex 2, France
| | - Ovidiu Ersen
- Institut de physique et chimie des matériaux de Strasbourg (IPCMS) UMR 7504 CNRS 23 rue du Lœss, BP 43 67034, Strasbourg Cedex 2, France
| | - Dennis A Bazylinski
- School of Life Sciences, University of Nevada at Las Vegas, Las Vegas, Nevada, 89154-4004, USA
| | - Ulysses Lins
- Instituto de Microbiologia, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
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Iavicoli I, Farina M, Fontana L, Lucchetti D, Leso V, Fanali C, Cufino V, Boninsegna A, Leopold K, Schindl R, Brucker D, Sgambato A. In vitro evaluation of the potential toxic effects of palladium nanoparticles on fibroblasts and lung epithelial cells. Toxicol In Vitro 2017; 42:191-199. [DOI: 10.1016/j.tiv.2017.04.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 12/14/2022]
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de Carvalho RT, Salgado LT, Amado Filho GM, Leal RN, Werckmann J, Rossi AL, Campos APC, Karez CS, Farina M. Biomineralization of calcium carbonate in the cell wall of Lithothamnion crispatum (Hapalidiales, Rhodophyta): correlation between the organic matrix and the mineral phase. J Phycol 2017; 53:642-651. [PMID: 28258584 DOI: 10.1111/jpy.12526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/11/2017] [Indexed: 06/06/2023]
Abstract
Over the past few decades, progress has been made toward understanding the mechanisms of coralline algae mineralization. However, the relationship between the mineral phase and the organic matrix in coralline algae has not yet been thoroughly examined. The aim of this study was to describe the cell wall ultrastructure of Lithothamnion crispatum, a cosmopolitan rhodolith-forming coralline algal species collected near Salvador (Brazil), and examine the relationship between the organic matrix and the nucleation and growth/shape modulation of calcium carbonate crystals. A nanostructured pattern was observed in L. crispatum along the cell walls. At the nanoscale, the crystals from L. crispatum consisted of several single crystallites assembled and associated with organic material. The crystallites in the bulk of the cell wall had a high level of spatial organization. However, the crystals displayed cleavages in the (104) faces after ultrathin sectioning with a microtome. This organism is an important model for biomineralization studies as the crystallographic data do not fit in any of the general biomineralization processes described for other organisms. Biomineralization in L. crispatum is dependent on both the soluble and the insoluble organic matrix, which are involved in the control of mineral formation and organizational patterns through an organic matrix-mediated process. This knowledge concerning the mineral composition and organizational patterns of crystals within the cell walls should be taken into account in future studies of changing ocean conditions as they represent important factors influencing the physico-chemical interactions between rhodoliths and the environment in coralline reefs.
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Affiliation(s)
| | - Leonardo Tavares Salgado
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, CEP, 22460-030, Rio de Janeiro, Brazil
| | | | - Rachel Nunes Leal
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, CEP, 22460-030, Rio de Janeiro, Brazil
| | - Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, CEP, 21941-590, Rio de Janeiro, Brazil
| | | | - Andrea Porto Carreiro Campos
- Instituto Nacional de Metrologia, Qualidade e Tecnologia, Diretoria de Metrologia Científica e Industrial, CEP, 25250-020, Duque de Caxias, Brazil
| | - Cláudia Santiago Karez
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, CEP, 22460-030, Rio de Janeiro, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, CEP, 21941-590, Rio de Janeiro, Brazil
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33
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Schieppati F, Pelizzari A, Borlenghi E, Passi A, Farina M, Orlando V, Rossi G. Full Dose of Danazol is a Highly Effective Treatment of Cytopenia in Lower Risk Myelodysplastic Syndromes. Leuk Res 2017. [DOI: 10.1016/s0145-2126(17)30398-3] [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: 11/24/2022]
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34
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Martínez N, Reca A, Szpilbarg N, Maskin B, Castro-Parodi M, Farina M, Damiano A. New insights into the pathogenesis of preeclampsia: The role of placental aquaporins. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.021] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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35
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Szpilbarg N, Reppetti J, Di Paola M, Castro-Parodi M, Martinez N, Farina M, Damiano A. Evidence for oxygen-mediated regulation of aqp4 expression in human placenta. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.067] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Reppetti J, Sehayian A, Szpilbarg N, Farina M, Damiano A, Martínez N. Hyperosmolar stress affects TRPV-1 expression and the physiological functions of human trophoblast. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.075] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ayala YA, Pontes B, Hissa B, Monteiro ACM, Farina M, Moura-Neto V, Viana NB, Nussenzveig HM. Effects of cytoskeletal drugs on actin cortex elasticity. Exp Cell Res 2017; 351:173-181. [DOI: 10.1016/j.yexcr.2016.12.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/30/2016] [Accepted: 12/22/2016] [Indexed: 12/27/2022]
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Chiappini F, Ceballos L, Pontillo C, Miret N, Farina M, Randi A. The endocrine disruptor hexachlorobenzene induces cell migration and enhances aromatase expression levels in human endometrial stromal cells. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Querido W, Farina M, Anselme K. Strontium ranelate improves the interaction of osteoblastic cells with titanium substrates: Increase in cell proliferation, differentiation and matrix mineralization. Biomatter 2016; 5:e1027847. [PMID: 26176488 PMCID: PMC5044704 DOI: 10.1080/21592535.2015.1027847] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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] [Indexed: 10/28/2022]
Abstract
We describe direct effects of strontium ranelate on the interaction of osteoblastic cells with different titanium substrates. Our goal was to better understand the potential of this drug for improving the efficacy of bone implants. Treatment was done with 0.12 and 0.5 mM Sr(2+) of strontium ranelate in cell culture. We analyzed cell response to the drug on titanium substrates with surface topographies obtained using acid etching, electro-erosion processing, sandblasting, and machine-tooling. Treatment preserved the initial cell adhesion to the substrates, cell shape parameters (area, aspect ratio, circularity, and solidity), and the orientation of cells on grooved surfaces. However, both concentrations of the drug increased cell proliferation in all substrates. Moreover, a dose-dependent increase in alkaline phosphatase activity and in the production of mineralized matrix with typical features of bone tissue was shown. The observed effects were similar in the different substrates. In conclusion, strontium ranelate improved the interaction of osteoblastic cells with titanium substrates, increasing cell proliferation and differentiation into mature osteoblasts and the production of bone-like mineralized matrix for all substrates. This study highlights a promising role of strontium ranelate on enhancing the clinical success of bone implants, particularly in patients with osteoporosis.
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Affiliation(s)
- William Querido
- a Institut de Sciences des Matériaux de Mulhouse; CNRS UMR7361; Université de Haute-Alsace ; Mulhouse , France.,b Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro ; Rio de Janeiro , Brazil.,c Instituto de Biofísica Carlos Chagas Filho; Universidade Federal do Rio de Janeiro ; Rio de Janeiro , Brazil
| | - Marcos Farina
- b Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro ; Rio de Janeiro , Brazil
| | - Karine Anselme
- a Institut de Sciences des Matériaux de Mulhouse; CNRS UMR7361; Université de Haute-Alsace ; Mulhouse , France
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Abreu F, Carolina A, Araujo V, Leão P, Silva KT, Carvalho FMD, Cunha ODL, Almeida LG, Geurink C, Farina M, Rodelli D, Jovane L, Pellizari VH, Vasconcelos ATD, Bazylinski DA, Lins U. Culture‐independent characterization of novel psychrophilic magnetotactic cocci from Antarctic marine sediments. Environ Microbiol 2016; 18:4426-4441. [DOI: 10.1111/1462-2920.13388] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/20/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Fernanda Abreu
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
| | | | - V. Araujo
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
| | - Pedro Leão
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
| | - Karen Tavares Silva
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
| | | | - Oberdan de Lima Cunha
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica25651‐070Petrópolis RJ Brazil
| | - Luiz Gonzaga Almeida
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica25651‐070Petrópolis RJ Brazil
| | - Corey Geurink
- School of Life SciencesUniversity of Nevada at Las VegasLas Vegas NV89154‐4004 USA
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
| | - Daniel Rodelli
- Instituto Oceanográfico, Universidade de São Paulo05508‐900São Paulo SP Brazil
| | - Luigi Jovane
- Instituto Oceanográfico, Universidade de São Paulo05508‐900São Paulo SP Brazil
| | - Vivian H. Pellizari
- Instituto Oceanográfico, Universidade de São Paulo05508‐900São Paulo SP Brazil
| | - Ana Tereza de Vasconcelos
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica25651‐070Petrópolis RJ Brazil
| | - Dennis A. Bazylinski
- School of Life SciencesUniversity of Nevada at Las VegasLas Vegas NV89154‐4004 USA
| | - Ulysses Lins
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro21941‐902Rio de Janeiro RJ Brazil
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41
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Ayala YA, Pontes B, Ether DS, Pires LB, Araujo GR, Frases S, Romão LF, Farina M, Moura-Neto V, Viana NB, Nussenzveig HM. Rheological properties of cells measured by optical tweezers. BMC Biophys 2016; 9:5. [PMID: 27340552 PMCID: PMC4917937 DOI: 10.1186/s13628-016-0031-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [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: 12/09/2015] [Accepted: 06/10/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND The viscoelastic properties of cells have been investigated by a variety of techniques. However, the experimental data reported in literature for viscoelastic moduli differ by up to three orders of magnitude. This has been attributed to differences in techniques and models for cell response as well as to the natural variability of cells. RESULTS In this work we develop and apply a new methodology based on optical tweezers to investigate the rheological behavior of fibroblasts, neurons and astrocytes in the frequency range from 1Hz to 35Hz, determining the storage and loss moduli of their membrane-cortex complex. To avoid distortions associated with cell probing techniques, we use a previously developed method that takes into account the influence of under bead cell thickness and bead immersion. These two parameters were carefully measured for the three cell types used. Employing the soft glass rheology model, we obtain the scaling exponent and the Young's modulus for each cell type. The obtained viscoelastic moduli are in the order of Pa. Among the three cell types, astrocytes have the lowest elastic modulus, while neurons and fibroblasts exhibit a more solid-like behavior. CONCLUSIONS Although some discrepancies with previous results remain and may be inevitable in view of natural variability, the methodology developed in this work allows us to explore the viscoelastic behavior of the membrane-cortex complex of different cell types as well as to compare their viscous and elastic moduli, obtained under identical and well-defined experimental conditions, relating them to the cell functions.
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Affiliation(s)
- Yareni A Ayala
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil.,Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-972 Brazil
| | - Bruno Pontes
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Diney S Ether
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil.,Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-972 Brazil
| | - Luis B Pires
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil.,Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-972 Brazil
| | - Glauber R Araujo
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Susana Frases
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Luciana F Romão
- Universidade Federal do Rio de Janeiro - Pólo de Xerém, Duque de Caxias, Rio de Janeiro 25245-390 Brazil
| | - Marcos Farina
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Vivaldo Moura-Neto
- Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, Rio de Janeiro 20231-092 Brazil
| | - Nathan B Viana
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil.,Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-972 Brazil
| | - H Moysés Nussenzveig
- LPO-COPEA, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil.,Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-972 Brazil
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Rossi AL, Ribeiro B, Lemos M, Werckmann J, Borojevic R, Fromont J, Klautau M, Farina M. Crystallographic orientation and concentric layers in spicules of calcareous sponges. J Struct Biol 2016; 196:164-172. [PMID: 27090155 DOI: 10.1016/j.jsb.2016.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/04/2016] [Accepted: 04/14/2016] [Indexed: 11/17/2022]
Abstract
In this work, the crystallography of calcareous sponges (Porifera) spicules and the organization pattern of the concentric layers present in their inner structure were investigated in 10 species of the subclass Calcaronea and three species of the subclass Calcinea. Polished spicules had specific concentric patterns that varied depending on the plane in which the spicules were sectioned. A 3D model of the concentric layers was created to interpret these patterns and the biomineralization process of the triactine spicules. The morphology of the spicules was compared with the crystallographic orientation of the calcite crystals by analyzing the Kikuchi diffraction patterns using a scanning electron microscope. Triactine spicules from the subclass Calcinea had actines (rays) elongated in the 〈210〉 direction, which is perpendicular to the c-axis. The scale spicules of the hypercalcified species Murrayona phanolepis presented the c-axis perpendicular to the plane of the scale, which is in accordance with the crystallography of all other Calcinea. The triactine spicules of the calcaronean species had approximately the same crystallographic orientation with the unpaired actine elongated in the ∼[211] direction. Only one Calcaronea species, whose triactine was regular, had a different orientation. Three different crystallographic orientations were found in diactines. Spicules with different morphologies, dimensions and positions in the sponge body had similar crystallographic directions suggesting that the crystallographic orientation of spicules in calcareous sponges is conserved through evolution.
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Affiliation(s)
- André Linhares Rossi
- Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil.
| | - Bárbara Ribeiro
- Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Instituto de Biologia, Laboratório de Biologia de Porifera, 21941-590 Rio de Janeiro, Brazil
| | - Moara Lemos
- Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
| | - Jacques Werckmann
- Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Instituto de Ciências Biomédicas, Laboratório de Biomineralização, 21941-590 Rio de Janeiro, Brazil
| | - Radovan Borojevic
- Centro de Medicina Regenerativa, Faculdade de Medicina de Petrópolis, Av Barão do Rio Branco, 25680-120 Petrópolis, RJ, Brazil
| | - Jane Fromont
- Western Australian Museum, Department of Aquatic Zoology, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Michelle Klautau
- Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Instituto de Biologia, Laboratório de Biologia de Porifera, 21941-590 Rio de Janeiro, Brazil
| | - Marcos Farina
- Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Instituto de Ciências Biomédicas, Laboratório de Biomineralização, 21941-590 Rio de Janeiro, Brazil
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Ribeiro AR, Gemini-Piperni S, Travassos R, Lemgruber L, Silva RC, Rossi AL, Farina M, Anselme K, Shokuhfar T, Shahbazian-Yassar R, Borojevic R, Rocha LA, Werckmann J, Granjeiro JM. Trojan-Like Internalization of Anatase Titanium Dioxide Nanoparticles by Human Osteoblast Cells. Sci Rep 2016; 6:23615. [PMID: 27021687 PMCID: PMC4810327 DOI: 10.1038/srep23615] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [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: 10/02/2015] [Accepted: 03/09/2016] [Indexed: 02/03/2023] Open
Abstract
Dentistry and orthopedics are undergoing a revolution in order to provide more reliable, comfortable and long-lasting implants to patients. Titanium (Ti) and titanium alloys have been used in dental implants and total hip arthroplasty due to their excellent biocompatibility. However, Ti-based implants in human body suffer surface degradation (corrosion and wear) resulting in the release of metallic ions and solid wear debris (mainly titanium dioxide) leading to peri-implant inflammatory reactions. Unfortunately, our current understanding of the biological interactions with titanium dioxide nanoparticles is still very limited. Taking this into consideration, this study focuses on the internalization of titanium dioxide nanoparticles on primary bone cells, exploring the events occurring at the nano-bio interface. For the first time, we report the selective binding of calcium (Ca), phosphorous (P) and proteins from cell culture medium to anatase nanoparticles that are extremely important for nanoparticle internalization and bone cells survival. In the intricate biological environment, anatase nanoparticles form bio-complexes (mixture of proteins and ions) which act as a kind of ‘Trojan-horse’ internalization by cells. Furthermore, anatase nanoparticles-induced modifications on cell behavior (viability and internalization) could be understand in detail. The results presented in this report can inspire new strategies for the use of titanium dioxide nanoparticles in several regeneration therapies.
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Affiliation(s)
- A R Ribeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.,Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Postgraduate Program in Translational Biomedicine, University of Grande Rio, Duque de Caxias, Brazil
| | - S Gemini-Piperni
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.,Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil
| | - R Travassos
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - L Lemgruber
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.,Welcome Trust Centre for Molecular Parasitology, University of Glasgow, United Kingdom
| | - R C Silva
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - A L Rossi
- Brazilian Center for Research in Physics-Rio de Janeiro, Brazil
| | - M Farina
- Biomineralization laboratory, Institute of Biomedical Sciences, University Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - K Anselme
- Institut de Science des Materiaux de Mulhouse-CNRS UMR7391, Universite de Haute-Alsace, Mulhouse, France
| | - T Shokuhfar
- Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Department of Bioengineering, University of Illinois at Chicago, Chicago 60607, United States
| | - R Shahbazian-Yassar
- Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 60607, United States
| | - R Borojevic
- Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Center of Regenerative Medicine, Faculty of Medicine-FASE, Petrópolis, Brasil
| | - L A Rocha
- Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Physics Department, University Estadual Paulista, Bauru, São Paulo, Brazil
| | - J Werckmann
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.,Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil
| | - J M Granjeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.,Brazilian Branch of Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), University Estadual Paulista, Faculty of Sciences, Bauru, São Paulo, Brazil.,Dental School, Fluminense Federal University, Niterói, Brazil
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44
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Eugenio M, Müller N, Frasés S, Almeida-Paes R, Lima LMTR, Lemgruber L, Farina M, de Souza W, Sant'Anna C. Yeast-derived biosynthesis of silver/silver chloride nanoparticles and their antiproliferative activity against bacteria. RSC Adv 2016. [DOI: 10.1039/c5ra22727e] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Here, we provided the first evidence of Ag/AgCl-nanoparticles production in yeast strains fromin vitrocultures.
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Affiliation(s)
- Mateus Eugenio
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
| | - Nathalia Müller
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
| | - Susana Frasés
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
| | | | - Luís Maurício T. R. Lima
- Laboratory of Pharmaceutical Biotechnology
- Federal University of Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Leandro Lemgruber
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
| | - Marcos Farina
- Laboratory of Biomineralization
- Federal University of Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Wanderley de Souza
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
| | - Celso Sant'Anna
- Laboratory of Biotechnology
- Directory of Metrology Applied to Life Science
- National Institute of Metrology, Quality and Technology
- Duque de Caxias
- Brazil
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45
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Farina M, Mauri M, Patriarca G, Simonutti R, Klasson KT, Cheng HN. 129Xe NMR studies of morphology and accessibility in porous biochar from almond shells. RSC Adv 2016. [DOI: 10.1039/c6ra18104j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
129Xe NMR EXSY plot demonstrating pore connectivity in sustainable almond shell biochar generated from anaerobic thermal activation and rainwater washing.
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Affiliation(s)
- M. Farina
- Department of Materials Science
- University of Milan-Bicocca
- 20125 Milan
- Italy
| | - M. Mauri
- Department of Materials Science
- University of Milan-Bicocca
- 20125 Milan
- Italy
- INSTM
| | - G. Patriarca
- Department of Materials Science
- University of Milan-Bicocca
- 20125 Milan
- Italy
| | - R. Simonutti
- Department of Materials Science
- University of Milan-Bicocca
- 20125 Milan
- Italy
- INSTM
| | - K. T. Klasson
- USDA Agricultural Research Service
- Southern Regional Research Center
- New Orleans
- USA
| | - H. N. Cheng
- USDA Agricultural Research Service
- Southern Regional Research Center
- New Orleans
- USA
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46
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Querido W, Rossi AL, Farina M. The effects of strontium on bone mineral: A review on current knowledge and microanalytical approaches. Micron 2015; 80:122-34. [PMID: 26546967 DOI: 10.1016/j.micron.2015.10.006] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [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: 06/11/2015] [Revised: 10/14/2015] [Accepted: 10/14/2015] [Indexed: 10/22/2022]
Abstract
The interest in effects of strontium (Sr) on bone has greatly increased in the last decade due to the development of the promising drug strontium ranelate. This drug is used for treating osteoporosis, a major bone disease affecting hundreds of millions of people worldwide, especially postmenopausal women. The novelty of strontium ranelate compared to other treatments for osteoporosis is its unique effect on bone: it simultaneously promotes bone formation by osteoblasts and inhibits bone resorption by osteoclasts. Besides affecting bone cells, treatment with strontium ranelate also has a direct effect on the mineralized bone matrix. Due to the chemical similarities between Sr and Ca, a topic that has long been of particular interest is the incorporation of Sr into bones replacing Ca from the mineral phase, which is composed by carbonated hydroxyapatite nanocrystals. Several groups have analyzed the mineral produced during treatment; however, most analysis were done with relatively large samples containing numerous nanocrystals, resulting thus on data that represents an average of many crystalline domains. The nanoscale analysis of the bone apatite crystals containing Sr has only been described in a few studies. In this study, we review the current knowledge on the effects of Sr on bone mineral and discuss the methodological approaches that have been used in the field. In particular, we focus on the great potential that advanced microscopy and microanalytical techniques may have on the detailed analysis of the nanostructure and composition of bone apatite nanocrystals produced during treatment with strontium ranelate.
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Affiliation(s)
- William Querido
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Andre L Rossi
- Centro Brasileiro de Pesquisas Físicas, 22290-180 Rio de Janeiro, RJ, Brazil
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, RJ, Brazil.
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47
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Mallard F, Farina M, Tully T. Within-species variation in long-term trajectories of growth, fecundity and mortality in the Collembola Folsomia candida. J Evol Biol 2015; 28:2275-84. [DOI: 10.1111/jeb.12752] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/31/2015] [Accepted: 09/02/2015] [Indexed: 11/28/2022]
Affiliation(s)
- F. Mallard
- Institut d'écologie et des sciences de l'environnement (IEES); Sorbonne Universités; UPMC Univ; Paris 06, CNRS, IRD, INRA Paris France
| | - M. Farina
- Institut d'écologie et des sciences de l'environnement (IEES); Sorbonne Universités; UPMC Univ; Paris 06, CNRS, IRD, INRA Paris France
| | - T. Tully
- Institut d'écologie et des sciences de l'environnement (IEES); Sorbonne Universités; UPMC Univ; Paris 06, CNRS, IRD, INRA Paris France
- ESPE de l'académie de Paris; Sorbonne Universités; Paris-Sorbonne Univ Paris 04 Paris France
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48
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do Amaral RJ, Matsiko A, Tomazette MR, Rocha WK, Cordeiro-Spinetti E, Levingstone TJ, Farina M, O'Brien FJ, El-Cheikh MC, Balduino A. Platelet-rich plasma releasate differently stimulates cellular commitment toward the chondrogenic lineage according to concentration. J Tissue Eng 2015; 6:2041731415594127. [PMID: 26380066 PMCID: PMC4555349 DOI: 10.1177/2041731415594127] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 02/03/2015] [Accepted: 06/03/2015] [Indexed: 01/22/2023] Open
Abstract
Platelet-rich plasma has been used to treat articular cartilage defects, with the expectations of anabolic and anti-inflammatory effects. However, its role on cellular chondrogenic or fibrogenic commitment is still a controversy. Herein, the role of platelet-rich plasma releasate, the product obtained following platelet-rich plasma activation, on cellular commitment toward the chondrogenic lineage was evaluated in vitro. Human nasoseptal chondrogenic cells and human bone marrow mesenchymal stromal cells were used as cell types already committed to the chondrogenic lineage and undifferentiated cells, respectively, as different concentrations of platelet-rich plasma releasate were tested in comparison to commonly used fetal bovine serum. Low concentration of platelet-rich plasma releasate (2.5%) presented similar effects on cellular growth compared to 10% fetal bovine serum, for both cell types. In a three-dimensional culture system, platelet-rich plasma releasate alone did not induce full nasoseptal chondrogenic cells cartilage-like pellet formation. Nonetheless, platelet-rich plasma releasate played a significant role on cell commitment as high-passage nasoseptal chondrogenic cells only originated cartilage-like pellets when expanded in the presence of platelet-rich plasma releasate rather than fetal bovine serum. Histological analyses and measurements of pellet area demonstrated that even low concentrations of platelet-rich plasma releasate were enough to prevent nasoseptal chondrogenic cells from losing their chondrogenic potential due to in vitro expansion thereby promoting their recommitment. Low concentration of platelet-rich plasma releasate supplemented in chondrogenic medium also increased the chondrogenic potential of mesenchymal stromal cells seeded on collagen-hyaluronic acid scaffolds, as observed by an increase in chondrogenic-related gene expression, sulfated glycosaminoglycan production, and compressive modulus following in vitro culture. On the contrary, higher concentration of platelet-rich plasma releasate (10%) hampered some of these features. In conclusion, platelet-rich plasma releasate was able to prevent cellular chondrogenic capacity loss, inducing regain of their phenotype, and modulate cell commitment. Our data support the hypothesis of platelet-rich plasma chondrogenic potential, allowing fetal bovine serum substitution for platelet-rich plasma releasate at specific concentrations in culture medium when chondrogenic commitment is desired on specific cell types and moments of culture.
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Affiliation(s)
- Ronaldo Jfc do Amaral
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brasil ; Excellion Serviços Biomédicos, Amil/UnitedHealth Group, Petrópolis, Brasil
| | - Amos Matsiko
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), Dublin, Ireland ; Trinity Centre for Bioengineering, Trinity College Dublin (TCD), Dublin, Ireland ; Advanced Materials and Bioengineering Research (AMBER) Centre, RCSI & TCD, Dublin, Ireland
| | - Marcel Rp Tomazette
- Laboratório de Biologia e Tecnologia Celular, Universidade Veiga de Almeida, Rio de Janeiro, Brasil
| | - Wanessa Kr Rocha
- Instituto Estadual de Hematologia Arthur de Siqueira Cavalcanti, Rio de Janeiro, Brasil
| | - Eric Cordeiro-Spinetti
- Laboratório de Biologia e Tecnologia Celular, Universidade Veiga de Almeida, Rio de Janeiro, Brasil
| | - Tanya J Levingstone
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), Dublin, Ireland ; Trinity Centre for Bioengineering, Trinity College Dublin (TCD), Dublin, Ireland ; Advanced Materials and Bioengineering Research (AMBER) Centre, RCSI & TCD, Dublin, Ireland
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brasil
| | - Fergal J O'Brien
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), Dublin, Ireland ; Trinity Centre for Bioengineering, Trinity College Dublin (TCD), Dublin, Ireland ; Advanced Materials and Bioengineering Research (AMBER) Centre, RCSI & TCD, Dublin, Ireland
| | - Marcia C El-Cheikh
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brasil
| | - Alex Balduino
- Excellion Serviços Biomédicos, Amil/UnitedHealth Group, Petrópolis, Brasil ; Laboratório de Biologia e Tecnologia Celular, Universidade Veiga de Almeida, Rio de Janeiro, Brasil
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49
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do Amaral RJFC, Benac P, Andrade LR, Farina M, Bernardazzi C, Arcanjo KD, Palumbo A, Cordeiro IR, Brito JM, El-Cheikh MC, Oliveira FL. Peritoneal Submesothelial Stromal Cells Support Hematopoiesis and Differentiate into Osteogenic and Adipogenic Cell Lineages. Cells Tissues Organs 2015; 200:118-31. [PMID: 25966855 DOI: 10.1159/000377624] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2015] [Indexed: 11/19/2022] Open
Abstract
The peritoneum is a thin membrane that covers most of the abdominal organs, composed of a monolayer of mesothelial cells and subjacent submesothelial loose connective tissue. Cells from the peritoneal wall are correlated with peritoneal fibrosis and epithelial-to-mesenchymal transition. However, the distinct involvement of mesothelial or submesothelial cells in such phenomena is still not clear. Here, we propose a new strategy to obtain stromal cells from anterior peritoneal wall explant cultures. These cells migrated from peritoneal tissues and proliferated in vitro for 4 weeks as adherent fibroblast-like cells. Optical and electronic microscopy analyses of the fragments revealed a significant submesothelial disorganization. The obtained cells were characterized as cytokeratin- vimentin+ laminin+ α-smooth muscle actin+, suggesting a connective tissue origin. Moreover, at the third passage, these stromal cells were CD90+CD73+CD29+Flk-1+CD45-, a phenotype normally attributed to cells of mesenchymal origin. These cells were able to support hematopoiesis, expressing genes involved in myelopoiesis (SCF, G-CSF, GM-CSF, IL-7 and CXCL-12), and differentiated into osteogenic and adipogenic cell lineages. The methodology demonstrated in this work can be considered an excellent experimental model to understand the physiology of the peritoneal wall in healthy and pathological processes. Moreover, this work shows for the first time that submesothelial stromal cells have properties similar to those of mesenchymal cells from other origins.
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Affiliation(s)
- R J F C do Amaral
- Laboratório de Proliferação e Diferenciação Celular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Corradi B, Malberti F, Farina M, Cosci P, Imbasciati E, Raieli G, Calliada F. Chronic renal failure due to atheromatous renovascular disease in the elderly. Contrib Nephrol 2015; 105:167-71. [PMID: 8252866 DOI: 10.1159/000422490] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- B Corradi
- Servizio di Nefrologia, Ospedale di Lodi, Italia
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