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Magalhães R, Proenca MP, Araújo JP, Nunes C, Pereira AM, Sousa CT. Fabrication of FePt nanowires through pulsed electrodeposition into nanoporous alumina templates. Appl Nanosci 2022. [DOI: 10.1007/s13204-022-02454-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Magalhães R, Guardiola F, Guerreiro I, Fontinha F, Moutinho S, Olsen R, Peres H, Oliva-Teles A. Effect of different dietary arachidonic, eicosapentaenoic, and docosahexaenoic acid content on selected immune parameters in gilthead sea bream (Sparus aurata). Fish and Shellfish Immunology Reports 2021; 2:100014. [DOI: 10.1016/j.fsirep.2021.100014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Magalhães R, Guerreiro I, Santos RA, Coutinho F, Couto A, Serra CR, Olsen RE, Peres H, Oliva-Teles A. Oxidative status and intestinal health of gilthead sea bream (Sparus aurata) juveniles fed diets with different ARA/EPA/DHA ratios. Sci Rep 2020; 10:13824. [PMID: 32796880 PMCID: PMC7427802 DOI: 10.1038/s41598-020-70716-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 07/22/2020] [Indexed: 12/16/2022] Open
Abstract
The present work assessed the effects of dietary ratios of essential fatty acids, arachidonic (ARA), eicosapentaenoic (EPA) and docosahexaenoic acid (DHA), on liver and intestine oxidative status, intestinal histomorphology and gut microbiota of gilthead sea bream. Four isoproteic and isolipidic plant-based diets were formulated containing a vegetable oil blend as the main lipid source. Diets were supplemented with ARA/EPA/DHA levels (%DM) equivalent to: 2%:0.2%:0.1% (Diet A); 1.0%:0.4%:0.4% (Diet B); 0%:0.6%:0.6% (Diet C); 0%:0.3%:1.5% (Diet D) and tested in triplicate groups for 56 days. Lipid peroxidation was higher in fish fed diets C and D while no differences were reported between diets regarding total, oxidized, and reduced glutathione, and oxidative stress index. Glutathione reductase was higher in fish fed diet A than diets C and D. No histological alterations were observed in the distal intestine. Lower microbiota diversity was observed in intestinal mucosa of fish fed diet C than A, while diets C and D enabled the proliferation of health-promoting bacteria from Bacteroidetes phylum (Asinibacterium sp.) and the absence of pathogenic species like Edwardsiella tarda. Overall, results suggest that a balance between dietary ARA/EPA + DHA promotes gilthead sea bream juveniles' health however higher dietary content of n-3 LC-PUFA might limited the presence of microbial pathogens in intestinal mucosa.
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Affiliation(s)
- R Magalhães
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal.
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007, Porto, Portugal.
| | - I Guerreiro
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - R A Santos
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007, Porto, Portugal
| | - F Coutinho
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - A Couto
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007, Porto, Portugal
| | - C R Serra
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - R E Olsen
- Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | - H Peres
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007, Porto, Portugal
| | - A Oliva-Teles
- CIMAR/CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, Universidade do Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007, Porto, Portugal
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Rodrigues PF, Fernandes FB, Magalhães R, Camacho E, Lopes A, Paula A, Basu R, Schell N. Thermo-mechanical characterization of NiTi orthodontic archwires with graded actuating forces. J Mech Behav Biomed Mater 2020; 107:103747. [DOI: 10.1016/j.jmbbm.2020.103747] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/17/2020] [Accepted: 03/20/2020] [Indexed: 11/26/2022]
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Amorim L, Magalhães R, Coelho A, Moreira P, Portugal-Nunes C, Castanho T, Marques P, Sousa N, Santos N. Linking sleep quality to brain connectivity: a multimodal MRI approach in normative ageing. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.043] [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: 10/25/2022]
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Xavier S, Rosa B, Monteiro S, Arieira C, Magalhães R, Cúrdia Gonçalves T, Boal Carvalho P, Magalhães J, Moreira MJ, Cotter J. Bowel preparation for small bowel capsule endoscopy - The later, the better! Dig Liver Dis 2019; 51:1388-1391. [PMID: 31122824 DOI: 10.1016/j.dld.2019.04.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 04/08/2019] [Accepted: 04/12/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND In small bowel capsule endoscopy (SBCE), the presence of residue may compromise diagnostic accuracy. AIMS To assess differences in quality of visualisation and diagnostic yield of SBCE using 3 different preparation protocols. METHODS Prospective, randomized, blind, pilot study. Protocol A:Clear liquids diet the day before the examination with fasting from 8p.m.; Protocol B:Protocol A + 2 pouches of Moviprep®(polyethylene glycol electrolyte solution + sodium ascorbate) in 1 L of water from 8p.m. of the day before the examination; Protocol C: Protocol A + 2 pouches of Moviprep® in 1 L of water consumed after real-time confirmation of capsule arrival at small bowel. Small bowel preparation was classified by two experienced physicians, considering the percentage of the examination during which mucosal observation was adequate: Excellent(>90%); Good(90-75%); Fair(75-50%); Poor(<50%). RESULTS 101 patients randomized to the 3 protocols (A 37, B 31, C 33 patients). Protocol C had an excellent/good small bowel preparation in a higher percentage of examinations for both readers(Reader 1-A:37.8% vs B:45.2% vs C:78.8%, p = 0.002 and Reader 2 -A:37.8% vs B:41.9% vs C:75.8%, p = 0.003). Also, protocol C had a higher detection of angioectasia (A:5.4% vs B:9.7% vs C:27.3%, p = 0.022). CONCLUSIONS The administration of Moviprep® after the capsule had reached the small bowel was associated with a better small bowel preparation and a higher detection of angioectasia.
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Affiliation(s)
- S Xavier
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal.
| | - B Rosa
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - S Monteiro
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - C Arieira
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - R Magalhães
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - T Cúrdia Gonçalves
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - P Boal Carvalho
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - J Magalhães
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - M J Moreira
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - J Cotter
- Hospital Senhora da Oliveira, Guimarães - Gastroenterology Department, Portugal; School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Guimarães/Braga, Portugal
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Fernandes A, Marques A, Vicente A, Faria M, Rosa T, Dias C, Magalhães R. O30 “1 Minute of Health”, a Daily Radio Health Show to increase Health Literacy. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz098.009] [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: 11/14/2022] Open
Affiliation(s)
- A Fernandes
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - A Marques
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - A Vicente
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - M Faria
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - T Rosa
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - C Dias
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
| | - R Magalhães
- Family Health Unit Vale do Sorraia of Grouping of Health Centers Lezíria, PORTUGAL
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Caseiro AR, Ivanova G, Pedrosa SS, Branquinho MV, Georgieva P, Barbosa PP, Santos JD, Magalhães R, Teixeira P, Pereira T, Maurício AC. Human umbilical cord blood plasma as an alternative to animal sera for mesenchymal stromal cells in vitro expansion - A multicomponent metabolomic analysis. PLoS One 2018; 13:e0203936. [PMID: 30304014 PMCID: PMC6179201 DOI: 10.1371/journal.pone.0203936] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 08/30/2018] [Indexed: 12/26/2022] Open
Abstract
Mesenchymal Stromal cells (MSCs) have a potential role in cell-based therapies. Foetal bovine serum (FBS) is used to supplement the basal cell culture medium but presents several disadvantages and risks. Other alternatives have been studied, including human umbilical cord blood plasma (hUCBP), aiming at the development of xeno-free culturing protocols. A comparative characterization of multicomponent metabolic composition of hUCBP and commercial FBS based on Nuclear Magnetic Resonance (NMR) spectroscopy and multivariate statistical analysis was performed. The analysis of 1H-NMR spectra revealed both similarities and differences between the two proposed supplements. Similar metabolites (amino acids, glucose, lipids and nucleotides) were found in the hUCBP and FBS NMR spectra. The results show that the major difference between the metabolic profiles of the two proposed supplements are due to the significantly higher levels of glucose and lower levels of lactate, glutamate, alanine and branched chain amino acids in hUCBP. Similar or slightly different levels of important proteinogenic amino acids, as well as of nucleotides, lipids were found in the hUCBP and FBS. In order to validate it’s suitability for cell culture, umbilical cord-MSCs (UC-MSCs) and dental pulp stem cells (DPSCs) were expanded using hUCBP. In both hMSCs, in vitro culture with hUCBP supplementation presented similar to improved metabolic performances when compared to FBS. The two cell types tested expressed different optimum hUCBP percentage content. For DPSCs, the optimum hUCBP content was 6% and for UC-MSCs, 4%. Cultured hMSCs displayed no changes in senescence indicators, as well as maintained characteristic surface marker’s expression. FBS substitution was associated with an increase in early apoptosis events, in a dose dependent manner, as well as to slight up- and down-regulation of targeted gene’s expression. Tri-lineage differentiation capacity was also influenced by the substitution of FBS by hUCBP.
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Affiliation(s)
- A. R. Caseiro
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, n° 228, Porto, Portugal
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, Portugal
- REQUIMTE/LAQV–U. Porto–Porto/Portugal, Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n, Porto, Portugal
| | - G. Ivanova
- REQUIMTE- LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Porto, Portugal
| | - S. S. Pedrosa
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, n° 228, Porto, Portugal
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, Portugal
| | - M. V. Branquinho
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, n° 228, Porto, Portugal
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, Portugal
| | - P. Georgieva
- Department of Electronics Telecommunications and Informatics, IEETA, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - P. P. Barbosa
- Biosckin, Molecular and Cell Therapies S.A., Laboratório Criovida, TecMaia, Rua Engenheiro Frederico Ulrich 2650, Moreira da Maia, Portugal
| | - J. D. Santos
- REQUIMTE/LAQV–U. Porto–Porto/Portugal, Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n, Porto, Portugal
| | - R. Magalhães
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, Porto, Portugal
| | - P. Teixeira
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, Porto, Portugal
| | - T. Pereira
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, n° 228, Porto, Portugal
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, Portugal
| | - A. C. Maurício
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, n° 228, Porto, Portugal
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, Portugal
- * E-mail: ,
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Magalhães R, Barrière DA, Novais A, Marques F, Marques P, Cerqueira J, Sousa JC, Cachia A, Boumezbeur F, Bottlaender M, Jay TM, Mériaux S, Sousa N. The dynamics of stress: a longitudinal MRI study of rat brain structure and connectome. Mol Psychiatry 2018; 23:1998-2006. [PMID: 29203852 DOI: 10.1038/mp.2017.244] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/04/2017] [Accepted: 09/06/2017] [Indexed: 01/09/2023]
Abstract
Stress is a well-established trigger for a number of neuropsychiatric disorders, as it alters both structure and function of several brain regions and its networks. Herein, we conduct a longitudinal neuroimaging study to assess how a chronic unpredictable stress protocol impacts the structure of the rat brain and its functional connectome in both high and low responders to stress. Our results reveal the changes that stress triggers in the brain, with structural atrophy affecting key regions such as the prelimbic, cingulate, insular and retrosplenial, somatosensory, motor, auditory and perirhinal/entorhinal cortices, the hippocampus, the dorsomedial striatum, nucleus accumbens, the septum, the bed nucleus of the stria terminalis, the thalamus and several brain stem nuclei. These structural changes are associated with increasing functional connectivity within a network composed by these regions. Moreover, using a clustering based on endocrine and behavioural outcomes, animals were classified as high and low responders to stress. We reveal that susceptible animals (high responders) develop local atrophy of the ventral tegmental area and an increase in functional connectivity between this area and the thalamus, further spreading to other areas that link the cognitive system with the fight-or-flight system. Through a longitudinal approach we were able to establish two distinct patterns, with functional changes occurring during the exposure to stress, but with an inflection point after the first week of stress when more prominent changes were seen. Finally, our study revealed differences in functional connectivity in a brainstem-limbic network that distinguishes resistant and susceptible responders before any exposure to stress, providing the first potential imaging-based predictive biomarkers of an individual's resilience/vulnerability to stressful conditions.
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Affiliation(s)
- R Magalhães
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - D A Barrière
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France
| | - A Novais
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - F Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - P Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J Cerqueira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J C Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - A Cachia
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Laboratoire de Psychologie du développement et de l'Education de l'Enfant, CNRS UMR, Paris, France.,Institut Universitaire de France, Paris, France
| | - F Boumezbeur
- Neurospin, JOLIOT, CEA, Gif/Yvette, Paris, France
| | | | - T M Jay
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Faculté de Médecine Paris Descartes, Service Hospitalo-Universitaire, Centre Hospitalier Sainte-Anne, Paris, France
| | - S Mériaux
- Neurospin, JOLIOT, CEA, Gif/Yvette, Paris, France
| | - N Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal. .,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Magalhães R, Philippe A, Catar R, Dragun D, Morato M. Reactivity of the rat distal colon to autoantibodies targeting angiotensin type I receptors: PS219. Porto Biomed J 2017; 2:186. [PMID: 32258638 DOI: 10.1016/j.pbj.2017.07.026] [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: 11/25/2022] Open
Affiliation(s)
- R Magalhães
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy of University of Porto, Portugal
| | - A Philippe
- Department of Nephrology and Critical Care Medicine, Charité University Medicine, Berlin, Germany
| | - R Catar
- Department of Nephrology and Critical Care Medicine, Charité University Medicine, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - D Dragun
- Department of Nephrology and Critical Care Medicine, Charité University Medicine, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - M Morato
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy of University of Porto, Portugal; MedInUP - Center for Drug Discovery and Innovative Medicines, University of Porto, Porto, Portugal
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Moreira PS, Marques P, Soriano-Mas C, Magalhães R, Sousa N, Soares JM, Morgado P. The neural correlates of obsessive-compulsive disorder: a multimodal perspective. Transl Psychiatry 2017; 7:e1224. [PMID: 28850108 PMCID: PMC5611752 DOI: 10.1038/tp.2017.189] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/20/2017] [Accepted: 06/23/2017] [Indexed: 01/14/2023] Open
Abstract
Obsessive-compulsive disorder (OCD) is one of the most debilitating psychiatric conditions. An extensive body of the literature has described some of the neurobiological mechanisms underlying the core manifestations of the disorder. Nevertheless, most reports have focused on individual modalities of structural/functional brain alterations, mainly through targeted approaches, thus possibly precluding the power of unbiased exploratory approaches. Eighty subjects (40 OCD and 40 healthy controls) participated in a multimodal magnetic resonance imaging (MRI) investigation, integrating structural and functional data. Voxel-based morphometry analysis was conducted to compare between-group volumetric differences. The whole-brain functional connectome, derived from resting-state functional connectivity (FC), was analyzed with the network-based statistic methodology. Results from structural and functional analysis were integrated in mediation models. OCD patients revealed volumetric reductions in the right superior temporal sulcus. Patients had significantly decreased FC in two distinct subnetworks: the first, involving the orbitofrontal cortex, temporal poles and the subgenual anterior cingulate cortex; the second, comprising the lingual and postcentral gyri. On the opposite, a network formed by connections between thalamic and occipital regions had significantly increased FC in patients. Integrative models revealed direct and indirect associations between volumetric alterations and FC networks. This study suggests that OCD patients display alterations in brain structure and FC, involving complex networks of brain regions. Furthermore, we provided evidence for direct and indirect associations between structural and functional alterations representing complex patterns of interactions between separate brain regions, which may be of upmost relevance for explaining the pathophysiology of the disorder.
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Affiliation(s)
- P S Moreira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal
| | - P Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal
| | - C Soriano-Mas
- Department of Psychiatry, Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) and CIBERSAM, Carlos III Health Institute, Barcelona, Spain,Department of Psychobiology and Methodology of Health Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - R Magalhães
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal
| | - N Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal
| | - J M Soares
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal
| | - P Morgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal,Clinical Academic Center–Braga, Braga, Portugal,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057 Portugal. E-mail:
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12
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Esteves M, Marques P, Magalhães R, Castanho T, Soares J, Almeida A, Santos N, Sousa N, Leite-Almeida H. Structural laterality is associated with cognitive and mood outcomes: An assessment of 105 healthy aged volunteers. Neuroimage 2017; 153:86-96. [DOI: 10.1016/j.neuroimage.2017.03.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/05/2017] [Accepted: 03/20/2017] [Indexed: 12/13/2022] Open
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13
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Magalhães R, Ferreira V, Biscottini G, Brandão T, Almeida G, Teixeira P. Biofilm formation by persistent and non-persistent Listeria monocytogenes strains on abiotic surfaces. Acta Alimentaria 2017. [DOI: 10.1556/066.2017.46.1.6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Magalhães R, Bourgin J, Boumezbeur F, Marques P, Bottlaender M, Poupon C, Djemaï B, Duchesnay E, Mériaux S, Sousa N, Jay TM, Cachia A. White matter changes in microstructure associated with a maladaptive response to stress in rats. Transl Psychiatry 2017; 7:e1009. [PMID: 28117841 PMCID: PMC5545740 DOI: 10.1038/tp.2016.283] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 11/30/2016] [Indexed: 12/29/2022] Open
Abstract
In today's society, every individual is subjected to stressful stimuli with different intensities and duration. This exposure can be a key trigger in several mental illnesses greatly affecting one's quality of life. Yet not all subjects respond equally to the same stimulus and some are able to better adapt to them delaying the onset of its negative consequences. The neural specificities of this adaptation can be essential to understand the true dynamics of stress as well as to design new approaches to reduce its consequences. In the current work, we employed ex vivo high field diffusion magnetic resonance imaging (MRI) to uncover the differences in white matter properties in the entire brain between Fisher 344 (F344) and Sprague-Dawley (SD) rats, known to present different responses to stress, and to examine the effects of a 2-week repeated inescapable stress paradigm. We applied a tract-based spatial statistics (TBSS) analysis approach to a total of 25 animals. After exposure to stress, SD rats were found to have lower values of corticosterone when compared with F344 rats. Overall, stress was found to lead to an overall increase in fractional anisotropy (FA), on top of a reduction in mean and radial diffusivity (MD and RD) in several white matter bundles of the brain. No effect of strain on the white matter diffusion properties was observed. The strain-by-stress interaction revealed an effect on SD rats in MD, RD and axial diffusivity (AD), with lower diffusion metric levels on stressed animals. These effects were localized on the left side of the brain on the external capsule, corpus callosum, deep cerebral white matter, anterior commissure, endopiriform nucleus, dorsal hippocampus and amygdala fibers. The results possibly reveal an adaptation of the SD strain to the stressful stimuli through synaptic and structural plasticity processes, possibly reflecting learning processes.
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Affiliation(s)
- R Magalhães
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J Bourgin
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Faculté de Médecine Paris Descartes, Service Hospitalo Universitaire, Centre Hospitalier Sainte-Anne, Paris, France
| | | | - P Marques
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | | - C Poupon
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | - B Djemaï
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | | | - S Mériaux
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | - N Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - T M Jay
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Faculté de Médecine Paris Descartes, Service Hospitalo Universitaire, Centre Hospitalier Sainte-Anne, Paris, France
| | - A Cachia
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Laboratoire de Psychologie du développement et de l’Education de l’Enfant, CNRS UMR 8240, Paris, France,Institut Universitaire de France, Paris, France,Centre de Psychiatrie et Neurosciences, INSERM UMR_S 894, 2 ter rue d’Alésia, Paris 75014, France. E-mail:
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15
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Magalhães R, Ferreira V, Brandão TRS, Palencia RC, Almeida G, Teixeira P. Persistent and non-persistent strains of Listeria monocytogenes: A focus on growth kinetics under different temperature, salt, and pH conditions and their sensitivity to sanitizers. Food Microbiol 2016; 57:103-8. [PMID: 27052708 DOI: 10.1016/j.fm.2016.02.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 01/25/2016] [Accepted: 02/15/2016] [Indexed: 11/24/2022]
Abstract
This study aimed to investigate the effect of different conditions, including temperature (37 °C, 22 °C, and 4 °C), NaCl concentrations (2.5%, 4%, and 8%), and acidity (pH = 5), on the growth response of persistent and non-persistent isolates of Listeria monocytogenes. The resistance to two common sanitizers (benzalkonium chloride and hydrogen peroxide) was also investigated. A selected group of 41 persistent and non-persistent L. monocytogenes isolates recovered from three cheese processing plants during a previous longitudinal study was assembled. Average lag time was similar for persistent and non-persistent isolates grown at 37 °C, 22 °C and 4 °C but significantly shorter (p < 0.05) for persistent isolates grown at 2.5%, 4% and 8% NaCl, and at pH 5. Average growth rates were significantly higher (p < 0.05) for persistent than for non-persistent isolates when grown at 22 °C, 2.5%, 4% and 8% NaCl, and at pH 5. These results suggest that persistent strains may be better adapted to grow under stressful conditions frequently encountered in food processing environments than non-persistent strains. No relation between persistence and resistance to the tested sanitizers was found.
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Affiliation(s)
- R Magalhães
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - V Ferreira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - T R S Brandão
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - R Casquete Palencia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - G Almeida
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - P Teixeira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
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16
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Almeida G, Magalhães R, Carneiro L, Santos I, Silva J, Ferreira V, Hogg T, Teixeira P. Foci of contamination of Listeria monocytogenes in different cheese processing plants. Int J Food Microbiol 2013; 167:303-9. [PMID: 24184608 DOI: 10.1016/j.ijfoodmicro.2013.09.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 09/14/2013] [Accepted: 09/16/2013] [Indexed: 12/14/2022]
Abstract
Listeria monocytogenes is a ubiquitous bacterium widely distributed in the environment that can cause a severe disease in humans when contaminated foods are ingested. Cheese has been implicated in sporadic cases and in outbreaks of listeriosis worldwide. Environmental contamination, in several occasions by persistent strains, has been considered an important source of finished product contamination. The objectives of this research were to (i) evaluate the presence of L. monocytogenes within the factory environments and cheeses of three processing plants, artisanal producer of raw ewe's milk cheeses (APC), small-scale industrial cheese producer (SSI) and industrial cheese producer (ICP) each producing a distinct style of cheese, all with history of contamination by L. monocytogenes (ii) and identify possible sources of contamination using different typing methods (arsenic and cadmium susceptibility, geno-serotyping, PFGE). The presence of markers specific for 3 epidemic clones (ECI-ECIII) of L. monocytogenes was also investigated. Samples were collected from raw milk (n = 179), whey (n = 3), cheese brining solution (n = 7), cheese brine sludge (n = 505), finished product (n = 3016), and environment (n = 2560) during, at least, a four-year period. Listeria monocytogenes was detected in environmental, raw milk and cheese samples, respectively, at 15.4%, 1.1% and 13.6% in APC; at 8.9%, 2.9% and 3.4% in SSI; and at 0%, 21.1% and 0.2% in ICP. Typing of isolates revealed that raw ewe's milk and the dairy plant environment are important sources of contamination, and that some strains persisted for at least four years in the environment. Although cheeses produced in the three plants investigated were never associated with any case or outbreak of listeriosis, some L. monocytogenes belonging to specific PFGE types that caused disease (including putative epidemic clone strains isolated from final products) were found in this study.
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Affiliation(s)
- G Almeida
- CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal
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17
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Abstract
Autoreactive B and T cells are present in healthy, autoimmunity-free individuals, but they are kept in check by various regulatory mechanisms. In systemic lupus erythematosus (SLE) patients, however, autoreactive cells are expanded, activated, and produce large quantities of autoantibodies, directed especially against nuclear antigens. These antibodies form immune complexes with self-nucleic acids present in SLE serum. Since self-DNA and self-RNA in the form of protein complexes can act as TLR9 and TLR7 ligands, respectively, TLR stimulation is suggested as an additional signal contributing to activation and/or modulation of the aberrant adaptive immune response. Data from mouse models suggest a pathogenic role for TLR7 and a protective role for TLR9 in the pathogenesis of SLE. Future investigations are needed to elucidate the underlying modulatory mechanisms and the role of TLR7 and TLR9 in the complex pathogenesis of human SLE.
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Affiliation(s)
- T Celhar
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, #03 Immunos, Singapore
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18
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Barbosa J, Borges S, Magalhães R, Ferreira V, Santos I, Silva J, Almeida G, Gibbs P, Teixeira P. Behaviour of Listeria monocytogenes isolates through gastro-intestinal tract passage simulation, before and after two sub-lethal stresses. Food Microbiol 2011; 30:24-8. [PMID: 22265279 DOI: 10.1016/j.fm.2011.10.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 09/21/2011] [Accepted: 10/05/2011] [Indexed: 11/16/2022]
Abstract
The effects of previous exposure to sub-lethal acidic and osmotic stresses on the survival of Listeria monocytogenes during exposure to gastro-intestinal (GI) tract simulation, was investigated. Six L. monocytogenes strains isolated from cheeses were selected and exposed to high salt concentrations or acidic conditions and their viability compared in quick and slow digestions. The results demonstrated that (i) all isolates were more sensitive to the exposure to acidic than to osmotic sub-lethal conditions (ii) significant differences (p < 0.05) between the two types of digestion were observed; in slow digestion, the log reduction was higher for all the tested isolates (iii) all isolates were inhibited in the presence of bile salts for both types of digestion (iv) differences between quick and slow digestion were not observed (p > 0.05) after exposure to either osmotic or acidic stress (v) a higher cellular inactivation (p < 0.001) was observed during the passage through the GI tract simulation after exposure to osmotic than to acidic stresses and (vi) neither osmotic nor acidic sub-lethal stresses conferred resistance to simulated GI tract conditions.
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Affiliation(s)
- J Barbosa
- CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
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19
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Almeida G, Morvan A, Magalhães R, Santos I, Hogg T, Leclercq A, Teixeira P. Distribution and characterization of Listeria monocytogenes clinical isolates in Portugal, 1994-2007. Eur J Clin Microbiol Infect Dis 2010; 29:1219-27. [PMID: 20563829 DOI: 10.1007/s10096-010-0988-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 05/29/2010] [Indexed: 10/19/2022]
Abstract
In recent years, the number of cases of listeriosis has increased worldwide. Ninety-five isolates of Listeria monocytogenes recovered from Portuguese human cases of listeriosis have been characterized by biotyping (cadmium and arsenic sensitivity), polymerase chain reaction (PCR) grouping, and by pulsed-field gel electrophoresis (PFGE) applying the enzymes AscI and ApaI. Isolates were classified into one of three PCR groups; IVb (71.6%), IIb (17.9%), and IIa (10.5%). Four biotypes were differentiated: sensitive to arsenic/cadmium (48.4%), arsenic-sensitive and cadmium-resistant (25.3%), resistant to arsenic and sensitive to cadmium (18.9%), and resistant to both heavy metals (7.4%). Combined analyses of AscI and ApaI patterns yielded a total of 58 PFGE types with five sets (G, Jb, KKa, Me, and U) of Portuguese strains, each of which were indistinguishable by PFGE typing. In the present study, it was demonstrated that there are recurrent pulsotypes and that some were the same pulsotypes linked to outbreaks in France. In addition, there are some pulsotypes spread throughout the country, while others only appear in a restricted region. This study allowed the assembly of a first large pulsotype database of Portuguese clinical strains.
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Affiliation(s)
- G Almeida
- Centro de Biotecnologia e Química Fina, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr António Bernardino de Almeida, 4200-072 Porto, Portugal
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20
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Zacarias M, Pinto H, Magalhães R, Tribolet J. A ‘context-aware’ and agent-centric perspective for the alignment between individuals and organizations. INFORM SYST 2010. [DOI: 10.1016/j.is.2009.03.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Moreira E, Pimentel T, Magalhães R, Tuna A, Correia M, Silva M. Cognitive performance in patients with ischaemic stroke: Preliminary results from the 7-year follow-up of an incidence study in Northern Portugal. J Neurol Sci 2009. [DOI: 10.1016/j.jns.2009.02.200] [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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22
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Maia L, Pinto P, Vasconcelos C, Magalhães R, Feldman H, Correia M. Sporadic cerebral amyloid angiopathy and superficial siderosis: Impacts on imaging and clinical profiles. J Neurol Sci 2009. [DOI: 10.1016/j.jns.2009.02.192] [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: 11/26/2022]
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23
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Kuleshova LL, Tan FCK, Magalhães R, Gouk SS, Lee KH, Dawe GS. Effective Cryopreservation of Neural Stem or Progenitor Cells without Serum or Proteins by Vitrification. Cell Transplant 2009; 18:135-144. [DOI: 10.3727/096368909788341298] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Development of effective cryopreservation protocols will be essential to realizing the potential for clinical application of neural stem and progenitor cells. Current cryopreservation protocols have been largely employed in research, which does not require as stringent consideration of viability and sterility. Therefore, these protocols involve the use of serum and protein additives, which can potentially introduce contaminants, and slow cooling with DMSO/glycerol-based cryopreservation solutions, which impairs cell survival. We investigated whether serum- and protein-free vitrification is effective for functional cryopreservation of neurosphere cultures of neural stem or progenitor cells. To protect the samples from introduction of other contaminants during handling and cryostorage, an original “straw-in-straw” method (250 μl sterile straw placed in 500 μl straw) for direct immersion into liquid nitrogen and storing the samples was also introduced. The protocol employed brief step-wise exposure to vitrification solution composed of ethylene glycol (EG) and sucrose (40% v/v EG, 0.6 M sucrose) and removal of vitrification solution at room temperature. Evaluation of the effects of vitrification revealed that there were no differences between control and vitrified neural stem or progenitor cells in expression of the neural stem or progenitor cell markers, proliferation, or multipotent differentiation. This sterile method for the xeno-free cryopreservation of murine neurospheres without animal or human proteins may have the potential to serve as a starting point for the development of cryopreservation protocols for human neural stem and progenitor cells for clinical use.
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Affiliation(s)
- L. L. Kuleshova
- Low Temperature Preservation Unit, National University Medical Institutes, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - F. C. K. Tan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Neurobiology and Ageing Programme, Centre for Life Sciences, National University of Singapore, Singapore
| | - R. Magalhães
- Low Temperature Preservation Unit, National University Medical Institutes, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - S. S. Gouk
- Low Temperature Preservation Unit, National University Medical Institutes, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - K. H. Lee
- Low Temperature Preservation Unit, National University Medical Institutes, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - G. S. Dawe
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Neurobiology and Ageing Programme, Centre for Life Sciences, National University of Singapore, Singapore
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24
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Kuleshova LL, Tan FCK, Magalhães R, Gouk SS, Lee KH, Dawe GS. Effective cryopreservation of neural stem or progenitor cells without serum or proteins by vitrification. Cell Transplant 2009; 18:135-144. [PMID: 19499702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Development of effective cryopreservation protocols will be essential to realizing the potential for clinical application of neural stem and progenitor cells. Current cryopreservation protocols have been largely employed in research, which does not require as stringent consideration of viability and sterility. Therefore, these protocols involve the use of serum and protein additives, which can potentially introduce contaminants, and slow cooling with DMSO/glycerol-based cryopreservation solutions, which impairs cell survival. We investigated whether serum- and protein-free vitrification is effective for functional cryopreservation of neurosphere cultures of neural stem or progenitor cells. To protect the samples from introduction of other contaminants during handling and cryostorage, an original "straw-in-straw" method (250 microl sterile straw placed in 500 microl straw) for direct immersion into liquid nitrogen and storing the samples was also introduced. The protocol employed brief step-wise exposure to vitrification solution composed of ethylene glycol (EG) and sucrose (40% v/v EG, 0.6 M sucrose) and removal of vitrification solution at room temperature. Evaluation of the effects of vitrification revealed that there were no differences between control and vitrified neural stem or progenitor cells in expression of the neural stem or progenitor cell markers, proliferation, or multipotent differentiation. This sterile method for the xeno-free cryopreservation of murine neurospheres without animal or human proteins may have the potential to serve as a starting point for the development of cryopreservation protocols for human neural stem and progenitor cells for clinical use.
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Affiliation(s)
- L L Kuleshova
- Low Temperature Preservation Unit, National University Medical Institutes, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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25
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Abstract
This is the first report on low-temperature preservation of self-assembled cell aggregates by vitrification, which is both a time- and cost-effective technology. We developed an effective protocol for vitrification (ice-free cryopreservation) of hepatocyte spheroids that employs rapid stepwise exposure to cryoprotectants (10.5 min) at room temperature and direct immersion into liquid nitrogen (-196°C). For this, three vitrification solutions (VS) were formulated and their effects on vitrified-warmed spheroids were examined. Cryopreservation using ethylene glycol (EG)-sucrose VS showed excellent preservation capability whereby highly preserved cell viability and integrity of vitrified spheroids were observed, through confocal and scanning electron microscopy imaging, when compared to untreated control. The metabolic functions of EG-sucrose VS-cryopreserved spheroids, as assessed by urea production and albumin secretion, were not significantly different from those of control within the same day of observation. In both the vitrification and control groups, albumin secretion was consistently high, ranging from 47.57 ± 14.39 to 70.38 ± 11.29 μg/106 cells and from 56.84 ± 14.48 to 71.79 ± 16.65 μg/106 cells, respectively, and urea production gradually increased through the culture period. The efficacy of vitrification procedure in preserving the functional ability of hepatocyte spheroids was not improved by introduction of a second penetrating cryoprotectant, 1,2-propanediol (PD). Spheroids cryopreserved with EG-PD-sucrose VS showed maintained cell viability; however, in continuous culture, levels of both metabolic functions were lower than those cryopreserved with EG-sucrose VS. EG-PD VS, in which nonpenetrating cryoprotectant (sucrose) was excluded, provided poor protection to spheroids during cryopreservation. This study demonstrated that sucrose plays an important role in the effective vitrification of self-assembled cell aggregates. In a broad view, the excellent results obtained suggest that the developed vitrification strategy, which is an alternative to freezing, may be effectively used as a platform technology in the field of cell transplantation.
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Affiliation(s)
- R. Magalhães
- Low Temperature Preservation Unit, National University Medical Institutes Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - X. W. Wang
- Department of General Surgery, Xiang Ya Hospital, Central South University, Changsha Hunan, PR China
| | - S. S. Gouk
- Low Temperature Preservation Unit, National University Medical Institutes Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - K. H. Lee
- Low Temperature Preservation Unit, National University Medical Institutes Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - C. M. Ten
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - H. Yu
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Institute of Bioengineering and Nanotechnology, Agency for Science, Technology and Research, Singapore
| | - L. L. Kuleshova
- Low Temperature Preservation Unit, National University Medical Institutes Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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26
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This P, Jung A, Boccacci P, Borrego J, Botta R, Costantini L, Crespan M, Dangl GS, Eisenheld C, Ferreira-Monteiro F, Grando S, Ibáñez J, Lacombe T, Laucou V, Magalhães R, Meredith CP, Milani N, Peterlunger E, Regner F, Zulini L, Maul E. Development of a standard set of microsatellite reference alleles for identification of grape cultivars. Theor Appl Genet 2004; 109:1448-58. [PMID: 15565426 DOI: 10.1007/s00122-004-1760-3] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2003] [Accepted: 06/16/2004] [Indexed: 05/04/2023]
Abstract
In order to investigate the comparability of microsatellite profiles obtained in different laboratories, ten partners in seven countries analyzed 46 grape cultivars at six loci (VVMD5, VVMD7, VVMD27, VVS2, VrZAG62, and VrZAG79). No effort was made to standardize equipment or protocols. Although some partners obtained very similar results, in other cases different absolute allele sizes and, sometimes, different relative allele sizes were obtained. A strategy for data comparison by means of reference to the alleles detected in well-known cultivars was proposed. For each marker, each allele was designated by a code based on the name of the reference cultivar carrying that allele. Thirty-three cultivars, representing from 13 to 23 alleles per marker, were chosen as references. After the raw data obtained by the different partners were coded, more than 97% of the data were in agreement. Minor discrepancies were attributed to errors, suboptimal amplification and visualization, and misscoring of heterozygous versus homozygous allele pairs. We have shown that coded microsatellite data produced in different laboratories with different protocols and conditions can be compared, and that it is suitable for the identification and SSR allele characterization of cultivars. It is proposed that the six markers employed here, already widely used, be adopted as a minimal standard marker set for future grapevine cultivar analyses, and that additional cultivars be characterized by means of the coded reference alleles presented here. The complete database is available at http://www.genres.de/eccdb/vitis/ Cuttings of the 33 reference cultivars are available on request from the Institut National de la Recherche Agronomique Vassal collection (didier.vares@ensam.inra.fr).
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Affiliation(s)
- P This
- Laboratory of Grape Genetics, UMR Diversité et Génomes des Plantes Cultivées (DGPC), Institut National de la Recherche Agronomique (INRA), 2, place P. Viala, 34060 Montpellier, France.
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27
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Sachpazidis I, Stassinakis A, Memos D, Fragou S, Nachamoulis S, Vamvatsikos A, Stavropoulou A, Fonseca M, Magalhães R, Valente B, D'Aquila A, Fruscione M, Ferreira J, Aguiar C. [@HOME is a new Eu-Project in Tele Home care]. BIOMED ENG-BIOMED TE 2003; 47 Suppl 1 Pt 2:970-2. [PMID: 12465359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
@Home is a robust platform for real-time remote monitoring of patients at their home by doctors at the hospital. Health monitoring sensors, which have the capability to measure quick and easy vital parameters such as blood pressure, pulse rate, temperature, oxygen saturation (SpO2), as well as ECG 12 leads are used. Additionally, an advantage of the platform is that all the sensors are wearable and the patient is able to walk around indoors or outdoors. Moreover, the sensors are able to convey the recorded data over Bluetooth, a short-range wireless communication, to any Bluetooth enabled device such as Desktop computer or a Pocket PC.
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Affiliation(s)
- I Sachpazidis
- Fraunhofer Institute for Computer Graphics, Darmstadt, Germany.
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Gerhard N, Krenn V, Magalhães R, Morawietz L, Brändlein S, König A. IgVH-genes analysis from psoriatic arthritis shows involvement of antigen-activated synovial B-lymphocytes. Z Rheumatol 2002; 61:718-27. [PMID: 12491138 DOI: 10.1007/s00393-002-0415-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The pathogenesis of psoriatic arthritis (PA), which occurs in 5-7% of patients with psoriasis vulgaris, is enigmatic. There are no molecular data about synovial B-cells of chronic synovitis of PA. In order to understand the B-cell response in PA, we analysed IgVH genes and specified replacement to silent mutation (R/S) ratios of the complementarity determining regions (CDR) and framework regions (FR) as well as VH families. To prove the existence of a common pattern we additionally analysed the IgVH genes at the amino-acid level. From 5 PA patients we took cryo-tissue sections with somatically mutated IgVH genes (sum R/sum S in the CDRs: 2.5-6.8), 62 of which were analysed. In one patient two cases of clonally related IgVH genes were observed. Identical amino-acid replacements in IgVH1 and IgVH4 were found at the same mutational "cold spot". These data indicate that antigen-activated B-cells participate in the formation of chronic synovitis of PA. Since, neither histopathologically nor immunohistochemically, no germinal centres could be detected, the clonally related IgVH genes may be interpreted as residues of a germinal centre reaction that occurred before synovectomy. The existence of identical amino-acid replacement mutations in IgVH1 and IgVH4 genes suggests that a limited number of antigens are common to all PA patients analysed. The recombinant expression of the IgVH could help to define B-cell specificities underlying the pathogenesis of chronic synovitis and dermatitis of PA.
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Affiliation(s)
- N Gerhard
- Orthopaedic Hospital, University of Würzburg
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29
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Sachpazidis I, Stassinakis A, Memos D, Fragou S, Nachamoulis S, Vamvatsikos A, Stavropoulou A, Fonseca M, Magalhães R, Valente B, D'Aquila A, Fruscione M, Ferreira J, Aguiar C. @HOME EIN NEUES EU-PROJEKT ZUM TELE HOME CARE. BIOMED ENG-BIOMED TE 2002. [DOI: 10.1515/bmte.2002.47.s1b.970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
The current global trend involving transformation of work and the crisis in large government economic development and intervention projects in the market are raising new challenges for social policies to combat poverty. This study reconstitutes and analyzes the tensions, paradoxes, and main consequences of this process, focusing on problems concerned with combining solidarity strategies and public welfare systems.
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Affiliation(s)
- R Magalhães
- Departamento de Ciências Sociais, Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, 21041-210, Brasil.
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Cremonese RV, Pereira-Filho AA, Magalhães R, de Mattos AA, Marroni CA, Zettler CG, Marroni NP. [Experimental cirrhosis induced by carbon tetrachloride inhalation: adaptation of the technique and evaluation of lipid peroxidation]. Arq Gastroenterol 2001; 38:40-7. [PMID: 11586997 DOI: 10.1590/s0004-28032001000100008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Long-term administration of carbon tetrachloride is an accepted experimental model to produce hepatic fibrosis. Oxidative stress has been postulated as a major molecular mechanism involved in carbon tetrachloride hepatotoxicity, where the reactive oxygen species play an important role in the pathogenesis of liver fibrosis. AIMS This study was conducted to evaluate the effectiveness of an experimental model of hepatic cirrhosis induced by carbon tetrachloride inhalation as well as the importance of lipid peroxidation and the characteristics of the ascitic fluid in this model. METHODS At first the hepatic histologic findings were assessed using the hematoxilineosin technique in different moments of carbon tetrachloride inhalation (5th, 7th, 9th, 12th weeks). Later, at the end of 15 weeks of the study the rats were divided in three groups (control; control + phenobarbital; and carbon tetrachloride + phenobarbital) for lipid peroxidation, ascitic fluid and histologic characteristics evaluation. For the lipid peroxidation analysis, thiobarbituric acid and QL techniques were used. Cytologic and bacteriologic parameters were analysed in the ascitic fluid. RESULTS Cirrhosis was established in 100% of carbon tetrachloride rats between the 12th and 15th weeks with an elevation in the lipid peroxidation carbon tetrachloride rats' livers. Ascitic fluid infection was observed in one of seven rats who has developed ascites. CONCLUSIONS The carbon tetrachloride inhalation method developed in this study is effective in cirrhosis induction and ascites formation, and the carbon tetrachloride cirrhosis physiopathogenesis is probably related to the oxidative stress installation.
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Affiliation(s)
- R V Cremonese
- Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul-UFRGS, no Hospital Irmandade Santa Casa de Misericórdia de Porto Alegre (ISCMPA), Porto Alegre, RS
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Faria MA, Magalhães R, Ferreira MA, Meredith CP, Monteiro FF. Vitis vinifera must varietal authentication using microsatellite DNA analysis (SSR). J Agric Food Chem 2000; 48:1096-1100. [PMID: 10775355 DOI: 10.1021/jf990837h] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A microsatellite DNA-based method for Vitis vinifera grape must authentication is presented. Five of the most important port wine producing grape cultivars (Tinta Roriz, Tinto Cão, Touriga Francesa, Touriga Nacional, and Tinta Barroca) were typed at four microsatellite loci described by Bowers et al. (Genome 1996, 39, 628-633) and Thomas and Scott (Theor. Appl. Genet. 1993, 86, 985-990). The corresponding 5 varietal musts and 26 must mixtures that result from the combination of the five varieties were also typed at the four loci. There were no differences between the corresponding leaf and varietal must profiles. All must combinations showed the expected band profiles corresponding to the sum of the varietal band profile components. Among the 26 must mixtures, 8 could be discriminated using the four loci.
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Affiliation(s)
- M A Faria
- CEQUP/Serviço de Bromatologia, Faculdade de Farmácia, Universidade do Porto, Rua de Aníbal Cunha, 4050-047 Porto, Portugal.
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33
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Rodrigues P, Azevedo J, Coucelo J, Simões D, Pereira M, Vaz T, Arroja I, Gil I, Gião M, Silva D, Magalhães R, Morais M. Coronary artery disease and diabetes mellitus: Potential synergic effect of lipoprotein (α) and fibrinogen. Atherosclerosis 1999. [DOI: 10.1016/s0021-9150(99)80247-0] [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: 11/24/2022]
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34
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Tavares BM, Amorim N, Magalhães R, Ferreira CD. [Oliguria, hyperpotassemia and pleural effusion in a dubious presentation of renal insufficiency]. Hospital (Rio J) 1969; 76:1019-32. [PMID: 5313920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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