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Craciun I, Silva J, Dutton LC, Loureiro J, Novo Matos J. Two- and three-dimensional transesophageal echocardiographic assessment and successful occlusion of a window-like patent ductus arteriosus in two dogs. J Vet Cardiol 2023; 51:214-219. [PMID: 38232623 DOI: 10.1016/j.jvc.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 12/15/2023] [Accepted: 12/22/2023] [Indexed: 01/19/2024]
Abstract
A 16-month-old Labrador-poodle cross (case 1) and a 3-month-old German shorthaired pointer (case 2) were referred for patent ductus arteriosus (PDA) occlusion. Two-dimensional transthoracic and two- and three-dimensional transesophageal echocardiography revealed a window-like PDA characterized by a wide and short ductus. Due to the atypical PDA morphology with no ampulla in case 1, ductal occlusion was attempted with non-canine-specific Amplatzer occluder devices. However, these were too small and failed to remain stable. Amplatz Canine Duct Occluder (ACDO) devices were used with success in both cases. Due to the defects' morphology, the proximal ACDO disc protruded into the aorta but there were no signs of obstruction to aortic blood flow 16 months (case 1) and 1 month (case 2) post-occlusion. We describe two cases of a window-like type PDA that were successfully occluded with an ACDO.
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Affiliation(s)
- I Craciun
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; Department of Clinical Sciences, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Calea Manastur 3-5, Cluj-Napoca 400372, Romania
| | - J Silva
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - L C Dutton
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK
| | - J Loureiro
- North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - J Novo Matos
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK.
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2
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Leclercq N, Marshall L, Weekers T, Basu P, Benda D, Bevk D, Bhattacharya R, Bogusch P, Bontšutšnaja A, Bortolotti L, Cabirol N, Calderón-Uraga E, Carvalho R, Castro S, Chatterjee S, De La Cruz Alquicira M, de Miranda JR, Dirilgen T, Dorchin A, Dorji K, Drepper B, Flaminio S, Gailis J, Galloni M, Gaspar H, Gikungu MW, Hatteland BA, Hinojosa-Diaz I, Hostinská L, Howlett BG, Hung KLJ, Hutchinson L, Jesus RO, Karklina N, Khan MS, Loureiro J, Men X, Molenberg JM, Mudri-Stojnić S, Nikolic P, Normandin E, Osterman J, Ouyang F, Oygarden AS, Ozolina-Pole L, Ozols N, Parra Saldivar A, Paxton RJ, Pitts-Singer T, Poveda K, Prendergast K, Quaranta M, Read SFJ, Reinhardt S, Rojas-Oropeza M, Ruiz C, Rundlöf M, Sade A, Sandberg C, Sgolastra F, Shah SF, Shebl MA, Soon V, Stanley DA, Straka J, Theodorou P, Tobajas E, Vaca-Uribe JL, Vera A, Villagra CA, Williams MK, Wolowski M, Wood TJ, Yan Z, Zhang Q, Vereecken NJ. Global taxonomic, functional, and phylogenetic diversity of bees in apple orchards. Sci Total Environ 2023; 901:165933. [PMID: 37536603 DOI: 10.1016/j.scitotenv.2023.165933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 07/27/2023] [Accepted: 07/29/2023] [Indexed: 08/05/2023]
Abstract
An essential prerequisite to safeguard pollinator species is characterisation of the multifaceted diversity of crop pollinators and identification of the drivers of pollinator community changes across biogeographical gradients. The extent to which intensive agriculture is associated with the homogenisation of biological communities at large spatial scales remains poorly understood. In this study, we investigated diversity drivers for 644 bee species/morphospecies in 177 commercial apple orchards across 33 countries and four global biogeographical biomes. Our findings reveal significant taxonomic dissimilarity among biogeographical zones. Interestingly, despite this dissimilarity, species from different zones share similar higher-level phylogenetic groups and similar ecological and behavioural traits (i.e. functional traits), likely due to habitat filtering caused by perennial monoculture systems managed intensively for crop production. Honey bee species dominated orchard communities, while other managed/manageable and wild species were collected in lower numbers. Moreover, the presence of herbaceous, uncultivated open areas and organic management practices were associated with increased wild bee diversity. Overall, our study sheds light on the importance of large-scale analyses contributing to the emerging fields of functional and phylogenetic diversity, which can be related to ecosystem function to promote biodiversity as a key asset in agroecosystems in the face of global change pressures.
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Affiliation(s)
- N Leclercq
- Agroecology Lab, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium.
| | - L Marshall
- Agroecology Lab, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium; Naturalis Biodiversity Center, Darwinweg 2, 2333 CR, Leiden, Netherlands
| | - T Weekers
- Agroecology Lab, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium
| | - P Basu
- Centre for Pollination Studies, University of Calcutta, Kolkata, India
| | - D Benda
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic; Department of Entomology, National Museum, Prague, Czech Republic
| | - D Bevk
- Department of Organisms and Ecosystems Research, National Institute of Biology, Ljubljana, Slovenia
| | - R Bhattacharya
- Centre for Pollination Studies, University of Calcutta, Kolkata, India
| | - P Bogusch
- Department of Biology, Faculty of Science, University of Hradec Králové, Hradec Králové, Czech Republic
| | - A Bontšutšnaja
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - L Bortolotti
- CREA Research Centre for Agriculture and Environment, Bologna, Italy
| | - N Cabirol
- Department of Ecology and Natural Resources, Faculty of Science, UNAM, México City, Mexico
| | - E Calderón-Uraga
- Department of Ecology and Natural Resources, Faculty of Science, UNAM, México City, Mexico
| | - R Carvalho
- Centre for Functional Ecology, Associate Laboratory TERRA, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - S Castro
- Centre for Functional Ecology, Associate Laboratory TERRA, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - S Chatterjee
- Centre for Pollination Studies, University of Calcutta, Kolkata, India
| | - M De La Cruz Alquicira
- Department of Ecology and Natural Resources, Faculty of Science, UNAM, México City, Mexico
| | - J R de Miranda
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, 750 05, Sweden
| | - T Dirilgen
- School of Agriculture and Food Science and Earth Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - A Dorchin
- Laboratory of Zoology, Université de Mons, Mons, Belgium; The Steinhardt Museum of Natural History, Tel Aviv University, 69978 Tel Aviv, Israel; Department of Entomology, Royal Museum for Central Africa, Tervuren, Belgium
| | - K Dorji
- College of Natural Resources, Royal University of Bhutan, Punakha, Bhutan
| | - B Drepper
- Division of Forest, Nature and Landscape, University of Leuven, Leuven, Belgium
| | - S Flaminio
- CREA Research Centre for Agriculture and Environment, Bologna, Italy; Laboratory of Zoology, Université de Mons, Mons, Belgium
| | - J Gailis
- Institute for Plant Protection Research Agrihorts, Latvia University of Life Sciences and Technologies, Jelgava, Latvia
| | - M Galloni
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna, Italy
| | - H Gaspar
- Centre for Functional Ecology, Associate Laboratory TERRA, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - M W Gikungu
- Department of Zoology, National Museums of Kenya, Nairobi, Kenya
| | - B A Hatteland
- Division for Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Aas, Norway; Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - I Hinojosa-Diaz
- Department of Zoology, Institute of Biology, UNAM, México City, Mexico
| | - L Hostinská
- Department of Biology, Faculty of Science, University of Hradec Králové, Hradec Králové, Czech Republic
| | - B G Howlett
- The New Zealand Institute for Plant & Food Research Limited, Lincoln, Canterbury, New Zealand
| | - K-L J Hung
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada; Oklahoma Biological Survey, University of Oklahoma, Norman, OK 73019, USA
| | - L Hutchinson
- School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom
| | - R O Jesus
- Graduate Program in Ecology, State University of Campinas, Campinas, São Paulo, Brazil
| | - N Karklina
- Institute for Plant Protection Research Agrihorts, Latvia University of Life Sciences and Technologies, Jelgava, Latvia
| | - M S Khan
- Department of Entomology, University of Agriculture, Peshawar, Pakistan
| | - J Loureiro
- Centre for Functional Ecology, Associate Laboratory TERRA, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - X Men
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences/Shandong Provincial Key Laboratory of Plant Virology,Jinan 250100, China
| | - J-M Molenberg
- Agroecology Lab, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium
| | - S Mudri-Stojnić
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia
| | - P Nikolic
- Faculty of Agriculture, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - E Normandin
- Centre sur la biodiversité, Département des sciences biologiques, Université de Montréal, QC, Québec H1X 2B2, Canada
| | - J Osterman
- General Zoology, Institute for Biology, Martin Luther University Halle-Wittenberg, Hoher Weg 8, 06120 Halle (Saale), Germany; Nature Conservation and Landscape Ecology, University of Freiburg, Tennenbacherstrasse 4, 79106, Freiburg im Breisgau, Germany
| | - F Ouyang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - A S Oygarden
- Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, Bø, Norway
| | - L Ozolina-Pole
- Institute for Plant Protection Research Agrihorts, Latvia University of Life Sciences and Technologies, Jelgava, Latvia
| | - N Ozols
- Institute for Plant Protection Research Agrihorts, Latvia University of Life Sciences and Technologies, Jelgava, Latvia
| | - A Parra Saldivar
- Instituto de Entomología, Universidad Metropolitana de Ciencias de la Educación (UMCE), Santiago, Chile
| | - R J Paxton
- General Zoology, Institute for Biology, Martin Luther University Halle-Wittenberg, Hoher Weg 8, 06120 Halle (Saale), Germany
| | - T Pitts-Singer
- USDA Agricultural Research Service, Pollinating Insects Research Unit, Logan, UT 84322, USA
| | - K Poveda
- Department of Entomology, Cornell University, 4126 Comstock Hall, Ithaca, NY 14853, USA
| | - K Prendergast
- Molecular and Life Sciences, Curtin University, Bentley, WA 6102, Australia
| | - M Quaranta
- CREA Research Centre for Agriculture and Environment, Bologna, Italy
| | - S F J Read
- The New Zealand Institute for Plant & Food Research Limited, Lincoln, Canterbury, New Zealand
| | - S Reinhardt
- Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, Bø, Norway
| | - M Rojas-Oropeza
- Department of Ecology and Natural Resources, Faculty of Science, UNAM, México City, Mexico
| | - C Ruiz
- Departamento Biología Animal, Edafología y Geología, Facultad de Ciencias, Universidad de La Laguna, La Laguna, 38206, Tenerife, Spain
| | - M Rundlöf
- Department of Biology, Lund University, Lund, Sweden
| | - A Sade
- Department of Evolutionary and Environmental Biology, University of Haifa, Mt. Carmel, 31905 Haifa, Israel
| | - C Sandberg
- Department of Biology, Lund University, Lund, Sweden; Calluna AB, Husargatan 3, Malmö, 211 28, Sweden
| | - F Sgolastra
- Department of Agricultural and Food Sciences, University of Bologna, Bologna, Italy
| | - S F Shah
- Department of Entomology, University of Agriculture, Peshawar, Pakistan
| | - M A Shebl
- Department of Plant Protection, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt
| | - V Soon
- Natural History Museum and Botanical Garden, University of Tartu, Vanemuise 46, 51003 Tartu, Estonia
| | - D A Stanley
- School of Agriculture and Food Science and Earth Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - J Straka
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - P Theodorou
- General Zoology, Institute for Biology, Martin Luther University Halle-Wittenberg, Hoher Weg 8, 06120 Halle (Saale), Germany
| | - E Tobajas
- Department of Biology, Lund University, Lund, Sweden; Department of Animal Biology, University of Salamanca, Campus Miguel de Unamuno, Salamanca, 37007, Spain
| | - J L Vaca-Uribe
- Laboratorio de Investigaciones en Abejas LABUN, Departamento de Biología, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá,111321, Colombia
| | - A Vera
- Departamento de Biología, Universidad Metropolitana de Ciencias de la Educación (UMCE), Santiago, Chile
| | - C A Villagra
- Instituto de Entomología, Universidad Metropolitana de Ciencias de la Educación (UMCE), Santiago, Chile
| | - M-K Williams
- Department of Biology, Utah State University, Logan, UT 84322, USA
| | - M Wolowski
- Institute of Natural Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - T J Wood
- Laboratory of Zoology, Université de Mons, Mons, Belgium
| | - Z Yan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Q Zhang
- Beijing Biodiversity Conservation Research Center/Beijing Milu Ecological Research Center, Beijing 100076, China
| | - N J Vereecken
- Agroecology Lab, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium
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Patrocinio D, Galván-Chacón V, Gómez-Blanco JC, Miguel SP, Loureiro J, Ribeiro MP, Coutinho P, Pagador JB, Sanchez-Margallo FM. Biopolymers for Tissue Engineering: Crosslinking, Printing Techniques, and Applications. Gels 2023; 9:890. [PMID: 37998980 PMCID: PMC10670821 DOI: 10.3390/gels9110890] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023] Open
Abstract
Currently, tissue engineering has been dedicated to the development of 3D structures through bioprinting techniques that aim to obtain personalized, dynamic, and complex hydrogel 3D structures. Among the different materials used for the fabrication of such structures, proteins and polysaccharides are the main biological compounds (biopolymers) selected for the bioink formulation. These biomaterials obtained from natural sources are commonly compatible with tissues and cells (biocompatibility), friendly with biological digestion processes (biodegradability), and provide specific macromolecular structural and mechanical properties (biomimicry). However, the rheological behaviors of these natural-based bioinks constitute the main challenge of the cell-laden printing process (bioprinting). For this reason, bioprinting usually requires chemical modifications and/or inter-macromolecular crosslinking. In this sense, a comprehensive analysis describing these biopolymers (natural proteins and polysaccharides)-based bioinks, their modifications, and their stimuli-responsive nature is performed. This manuscript is organized into three sections: (1) tissue engineering application, (2) crosslinking, and (3) bioprinting techniques, analyzing the current challenges and strengths of biopolymers in bioprinting. In conclusion, all hydrogels try to resemble extracellular matrix properties for bioprinted structures while maintaining good printability and stability during the printing process.
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Affiliation(s)
- David Patrocinio
- CCMIJU, Bioengineering and Health Technologies, Jesus Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain; (D.P.); (V.G.-C.); (J.B.P.)
| | - Victor Galván-Chacón
- CCMIJU, Bioengineering and Health Technologies, Jesus Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain; (D.P.); (V.G.-C.); (J.B.P.)
| | - J. Carlos Gómez-Blanco
- CCMIJU, Bioengineering and Health Technologies, Jesus Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain; (D.P.); (V.G.-C.); (J.B.P.)
| | - Sonia P. Miguel
- CPIRN-IPG, Center of Potential and Innovation of Natural Resources, Polytechnic of Guarda, 6300-559 Guarda, Portugal (M.P.R.)
- CICS-UBI, Health Science Research Center, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Jorge Loureiro
- CPIRN-IPG, Center of Potential and Innovation of Natural Resources, Polytechnic of Guarda, 6300-559 Guarda, Portugal (M.P.R.)
| | - Maximiano P. Ribeiro
- CPIRN-IPG, Center of Potential and Innovation of Natural Resources, Polytechnic of Guarda, 6300-559 Guarda, Portugal (M.P.R.)
- CICS-UBI, Health Science Research Center, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Paula Coutinho
- CPIRN-IPG, Center of Potential and Innovation of Natural Resources, Polytechnic of Guarda, 6300-559 Guarda, Portugal (M.P.R.)
- CICS-UBI, Health Science Research Center, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - J. Blas Pagador
- CCMIJU, Bioengineering and Health Technologies, Jesus Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain; (D.P.); (V.G.-C.); (J.B.P.)
- CIBER CV, Centro de Investigación Biomédica en Red—Enfermedades Cardiovasculares, 28029 Madrid, Spain;
| | - Francisco M. Sanchez-Margallo
- CIBER CV, Centro de Investigación Biomédica en Red—Enfermedades Cardiovasculares, 28029 Madrid, Spain;
- Scientific Direction, Jesus Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain
- TERAV/ISCIII, Red Española de Terapias Avanzadas, Instituto de Salud Carlos III (RICORS, RD21/0017/0029), 28029 Madrid, Spain
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Loureiro J, Miguel SP, Galván-Chacón V, Patrocinio D, Pagador JB, Sánchez-Margallo FM, Ribeiro MP, Coutinho P. Three-Dimensionally Printed Hydrogel Cardiac Patch for Infarct Regeneration Based on Natural Polysaccharides. Polymers (Basel) 2023; 15:2824. [PMID: 37447470 DOI: 10.3390/polym15132824] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/19/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Myocardial infarction is one of the more common cardiovascular diseases, and remains the leading cause of death, globally. Hydrogels (namely, those using natural polymers) provide a reliable tool for regenerative medicine and have become a promising option for cardiac tissue regeneration due to their hydrophilic character and their structural similarity to the extracellular matrix. Herein, a functional ink based on the natural polysaccharides Gellan gum and Konjac glucomannan has, for the first time, been applied in the production of a 3D printed hydrogel with therapeutic potential, with the goal of being locally implanted in the infarcted area of the heart. Overall, results revealed the excellent printability of the bioink for the development of a stable, porous, biocompatible, and bioactive 3D hydrogel, combining the specific advantages of Gellan gum and Konjac glucomannan with proper mechanical properties, which supports the simplification of the implantation process. In addition, the structure have positive effects on endothelial cells' proliferation and migration that can promote the repair of injured cardiac tissue. The results presented will pave the way for simple, low-cost, and efficient cardiac tissue regeneration using a 3D printed hydrogel cardiac patch with potential for clinical application for myocardial infarction treatment in the near future.
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Affiliation(s)
- Jorge Loureiro
- CPIRN-IPG-Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal
| | - Sónia P Miguel
- CPIRN-IPG-Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal
- CICS-UBI-Health Sciences Research Center, University of Beira Interior, 6201-001 Covilhã, Portugal
| | | | - David Patrocinio
- Jesús Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain
| | - José Blas Pagador
- Jesús Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain
- TERAV/ISCIII-Red Española de Terapias Avanzadas, 10071 Cáceres, Spain
| | - Francisco M Sánchez-Margallo
- Jesús Usón Minimally Invasive Surgery Center, 10071 Cáceres, Spain
- TERAV/ISCIII-Red Española de Terapias Avanzadas, 10071 Cáceres, Spain
- CIBER CV-Centro de Investigación Biomédica en Red-Enfermedades Cardiovasculares, 28029 Madrid, Spain
| | - Maximiano P Ribeiro
- CPIRN-IPG-Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal
- CICS-UBI-Health Sciences Research Center, University of Beira Interior, 6201-001 Covilhã, Portugal
| | - Paula Coutinho
- CPIRN-IPG-Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal
- CICS-UBI-Health Sciences Research Center, University of Beira Interior, 6201-001 Covilhã, Portugal
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Novo Matos J, Sargent J, Silva J, Payne JR, Seo J, Spalla I, Borgeat K, Loureiro J, Pereira N, Simcock IC, Hutchinson JC, Arthurs OJ, Luis Fuentes V. Thin and hypokinetic myocardial segments in cats with cardiomyopathy. J Vet Cardiol 2023; 46:5-17. [PMID: 36893525 DOI: 10.1016/j.jvc.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 01/30/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
INTRODUCTION/OBJECTIVES Thin and hypokinetic myocardial segments (THyMS) represent adverse ventricular (LV) remodeling in human hypertrophic cardiomyopathy. We describe the echocardiographic features and outcome in cats with THyMS, and in a subpopulation, the echocardiographic phenotype before LV wall thinning was detected (pre-THyMS). ANIMALS Eighty client-owned cats. MATERIALS AND METHODS Retrospective multicenter study. Clinical records were searched for cats with THyMS, defined as LV segment(s) with end-diastolic wall thickness (LVWT) <3 mm and hypokinesis in the presence of ≥one LV segment(s) with LVWT >4 mm and normal wall motion. When available, echocardiograms pre-THyMS were assessed. Survival time was defined as time from first presentation with THyMS to death. RESULTS Mean thickest LV wall segment (MaxLVWT) was 6.1 mm (95% CI 5.8-6.4 mm) and thinnest (MinLVWT) was 1.7 mm (95% CI 1.6-1.9 mm). The LV free wall was affected in 74%, apex in 13% and septum in 5%. Most cats (85%) presented with heart failure and/or arterial thromboembolism. Median circulating troponin I concentration was 1.4 ng/mL ([range 0.07-180 ng/mL]). Prior echocardiography results were available for 13/80 cats, a mean of 2.5 years pre-THyMS. In segments subsequently undergoing thinning, initial MaxLVWT measured 6.7 mm (95% CI 5.8-7.7 mm) vs. 1.9 mm (95% CI 1.5-2.4 mm) at last echocardiogram (P<0.0001). Survival data were available for 56/80 cats, median survival time after diagnosing THyMS was 153 days (95% CI 83-223 days). Cardiac histopathology in one cat revealed that THyMS was associated with severe transmural scarring. CONCLUSIONS Cats with THyMS had advanced cardiomyopathy and a poor prognosis.
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Affiliation(s)
- J Novo Matos
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, AL9 7TA, London, UK.
| | - J Sargent
- Southern Counties Veterinary Specialists, Unit 6, Forest Corner Farm, Hangersley, BH24 3JW, Ringwood, Hampshire, UK
| | - J Silva
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - J R Payne
- Langford Vets Small Animal Referral Hospital, University of Bristol, Langford House, BS40 5DU, Langford, UK
| | - J Seo
- Animal Referral Centre, 224 Albany Highway, Schnapper Rock, 0632, Auckland, New Zealand
| | - I Spalla
- Ospedale Veterinario San Francesco, Via Feltrina, 29, 31038, Castagnole, Milan, Italy
| | - K Borgeat
- Langford Vets Small Animal Referral Hospital, University of Bristol, Langford House, BS40 5DU, Langford, UK
| | - J Loureiro
- North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - N Pereira
- Freelance Cardiology, Salstrasse 92, 8400, Winterthur, Switzerland
| | - I C Simcock
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - J C Hutchinson
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - O J Arthurs
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - V Luis Fuentes
- Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, AL9 7TA, London, UK
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Loureiro J, Miguel SP, Galván-Chacón VP, Patrocinio D, Sánchez-Margallo FM, Pagador JB, Ribeiro MP, Coutinho P. DEVELOPMENT OF A NATURAL POLYMER-BASED HYDROGEL FOR BIOENGINEERED VASCULAR GRAFTS. Br J Surg 2023. [DOI: 10.1093/bjs/znac443.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Abstract
Introduction
Cardiovascular diseases are a main cause of death globally, and their treatment implies various vascular repairs through different techniques like angioplasty, stent placement in the blocked artery, or bypass surgery. Artificial grafts would significantly reduce the number of non-treated patients, but middle and long-term failures compromise their clinical use.
Methods
Herein, we developed a hydrogel composed of gellan gum, gelatin, and sodium alginate for bioengineered vascular graft production. The vascular grafts were characterized by their swelling, porosity, biodegradability, and cytotoxic profile.
Results
The bioengineered materials were easily assembled due to the thermoresponsive nature of the hydrogel and had a vessel-like structure resembling the native vasculature. These vessels had a very controlled swelling degree, and notably, the hydrogel structure was stable and maintained its morphology. The vascular grafts had a porosity of 82.6 ± 4.3% and exhibited a controlled biodegradation rate with a maximum of 24.2 ± 3.0%. As expected, the natural materials used showed no cytotoxicity toward HUVECs cells since they are natural polymers described as biocompatible.
Conclusions
This developed natural hydrogel showed promising potential to be used to develop bioengineered vascular grafts.
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Affiliation(s)
- J Loureiro
- Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda
| | - S P Miguel
- Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda.CICS-UBI- Health Sciences Research Centre, University of Beira Interior
| | | | | | | | - J B Pagador
- Jesús Usón Minimally Invasive Surgery Center
| | - M P Ribeiro
- Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda.CICS-UBI- Health Sciences Research Centre, University of Beira Interior
| | - P Coutinho
- Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda.CICS-UBI- Health Sciences Research Centre, University of Beira Interior
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S, Popescu MI, Cozma A, Babes EE, Rus M, Ardelean A, Larisa R, Moisi M, Ban E, Buzle A, Filimon G, Dobreanu D, Lupu S, Mitre A, Rudzik R, Sus I, Opris D, Somkereki C, Mornos C, Petrescu L, Betiu A, Volcescu A, Ioan O, Luca C, Maximov D, Mosteoru S, Pascalau L, Roman C, Brie D, Crisan S, Erimescu C, Falnita L, Gaita D, Gheorghiu M, Levashov S, Redkina M, Novitskii N, Dementiev E, Baglikov A, Zateyshchikov D, Zubova E, Rogozhina A, Salikov A, Nikitin I, Reznik EV, Komissarova MS, Shebzukhova M, Shitaya K, Stolbova S, Larina V, Akhmatova F, Chuvarayan G, Arefyev MN, Averkov OV, Volkova AL, Sepkhanyan MS, Vecherko VI, Meray I, Babaeva L, Goreva L, Pisaryuk A, Potapov P, Teterina M, Ageev F, Silvestrova G, Fedulaev Y, Pinchuk T, Staroverov I, Kalimullin D, Sukhinina T, Zhukova N, Ryabov V, Kruchinkina E, Vorobeva D, Shevchenko I, Budyak V, Elistratova O, Fetisova E, Islamov R, Ponomareva E, Khalaf H, Shaimaa AA, Kamal W, Alrahimi J, Elshiekh A, Balghith M, Ahmed A, Attia N, Jamiel AA, Potpara T, Marinkovic M, Mihajlovic M, Mujovic N, Kocijancic A, Mijatovic Z, Radovanovic M, Matic D, Milosevic A, Savic L, Subotic I, Uscumlic A, Zlatic N, Antonijevic J, Vesic O, Vucic R, Martinovic SS, Kostic T, Atanaskovic V, Mitic V, Stanojevic D, Petrovic M. Cohort profile: the ESC EURObservational Research Programme Non-ST-segment elevation myocardial infraction (NSTEMI) Registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:8-15. [PMID: 36259751 DOI: 10.1093/ehjqcco/qcac067] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 11/12/2022]
Abstract
AIMS The European Society of Cardiology (ESC) EURObservational Research Programme (EORP) Non-ST-segment elevation myocardial infarction (NSTEMI) Registry aims to identify international patterns in NSTEMI management in clinical practice and outcomes against the 2015 ESC Guidelines for the management of acute coronary syndromes in patients presenting without ST-segment-elevation. METHODS AND RESULTS Consecutively hospitalised adult NSTEMI patients (n = 3620) were enrolled between 11 March 2019 and 6 March 2021, and individual patient data prospectively collected at 287 centres in 59 participating countries during a two-week enrolment period per centre. The registry collected data relating to baseline characteristics, major outcomes (in-hospital death, acute heart failure, cardiogenic shock, bleeding, stroke/transient ischaemic attack, and 30-day mortality) and guideline-recommended NSTEMI care interventions: electrocardiogram pre- or in-hospital, pre-hospitalization receipt of aspirin, echocardiography, coronary angiography, referral to cardiac rehabilitation, smoking cessation advice, dietary advice, and prescription on discharge of aspirin, P2Y12 inhibition, angiotensin converting enzyme inhibitor (ACEi)/angiotensin receptor blocker (ARB), beta-blocker, and statin. CONCLUSION The EORP NSTEMI Registry is an international, prospective registry of care and outcomes of patients treated for NSTEMI, which will provide unique insights into the contemporary management of hospitalised NSTEMI patients, compliance with ESC 2015 NSTEMI Guidelines, and identify potential barriers to optimal management of this common clinical presentation associated with significant morbidity and mortality.
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Affiliation(s)
- Ramesh Nadarajah
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
| | - Peter Ludman
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Yolande Appelman
- Department of Cardiology, Amsterdam UMC-Vrije Universiteit, Amsterdam Cardiovascular Sciences, Amsterdam, Netherlands
| | - Salvatore Brugaletta
- Hospital Clinic de Barcelona, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Andrzej Budaj
- Department of Cardiology, Center of Postgraduate Medical Education, Grochowski Hospital, Warsaw, Poland
| | - Hector Bueno
- Cardiology Department, Hospital Universitario 12 de Octubre and Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Kurt Huber
- 3rd Medical Department, Cardiology and Intensive Care Medicine, Clinic Ottakring (Wilhelminenhospital), Vienna, Austria.,Medical Faculty, Sigmund Freud University, Vienna, Austria
| | - Vijay Kunadian
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.,Cardiothoracic Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Sergio Leonardi
- University of Pavia, Pavia, Italy.,Fondazione IRCCS Policlinico S.Matteo, Pavia, Italy
| | - Maddalena Lettino
- Cardio-Thoracic and Vascular Department, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Dejan Milasinovic
- Department of Cardiology, University Clinical Center of Serbia and Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Chris P Gale
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
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De Jesús Valle MJ, Zarzuelo Castañeda A, Maderuelo C, Cencerrado Treviño A, Loureiro J, Coutinho P, Sánchez Navarro A. Development of a Mucoadhesive Vehicle Based on Lyophilized Liposomes for Drug Delivery through the Sublingual Mucosa. Pharmaceutics 2022; 14:pharmaceutics14071497. [PMID: 35890395 PMCID: PMC9317145 DOI: 10.3390/pharmaceutics14071497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/12/2022] [Accepted: 07/15/2022] [Indexed: 12/02/2022] Open
Abstract
A pharmaceutical vehicle based on lyophilized liposomes is proposed for the buccal administration of drugs aimed at systemic delivery through the sublingual mucosa. Liposomes made of egg phosphatidylcholine and cholesterol (7/3 molar ratio) were prepared and lyophilized in the presence of different additive mixtures with mucoadhesive and taste-masking properties. Palatability was assayed on healthy volunteers. The lyophilization cycle was optimized, and the lyophilized product was compressed to obtain round and capsule-shaped tables that were evaluated in healthy volunteers. Tablets were also assayed regarding weight and thickness uniformities, swelling index and liposome release. The results proved that lyophilized liposomes in unidirectional round tablets have palatability, small size, comfortability and buccal retention adequate for sublingual administration. In contact with water fluids, the tablets swelled, and rehydrated liposomes were released at a slower rate than permeation efficiency determined using a biomimetic membrane. Permeability efficiency values of 0.72 ± 0.34 µg/cm2/min and 4.18 ± 0.95 µg/cm2/min were obtained for the liposomes with and without additives, respectively. Altogether, the results point to the vehicle proposed as a liposomal formulation suitable for systemic drug delivery through the sublingual mucosa.
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Affiliation(s)
- María José De Jesús Valle
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; (M.J.D.J.V.); (A.Z.C.); (C.M.); (A.C.T.)
- Institute of Biopharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain
| | - Aranzazu Zarzuelo Castañeda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; (M.J.D.J.V.); (A.Z.C.); (C.M.); (A.C.T.)
- Institute of Biopharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain
| | - Cristina Maderuelo
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; (M.J.D.J.V.); (A.Z.C.); (C.M.); (A.C.T.)
- Institute of Biopharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain
| | - Alejandro Cencerrado Treviño
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; (M.J.D.J.V.); (A.Z.C.); (C.M.); (A.C.T.)
| | - Jorge Loureiro
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal; (J.L.); (P.C.)
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, 6200-506 Covilha, Portugal
| | - Paula Coutinho
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal; (J.L.); (P.C.)
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, 6200-506 Covilha, Portugal
| | - Amparo Sánchez Navarro
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; (M.J.D.J.V.); (A.Z.C.); (C.M.); (A.C.T.)
- Institute of Biopharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain
- Correspondence: ; Tel.: +34-677-584152
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Loureiro J, Miguel SP, Seabra IJ, Ribeiro MP, Coutinho P. Single-Step Self-Assembly of Zein–Honey–Chitosan Nanoparticles for Hydrophilic Drug Incorporation by Flash Nanoprecipitation. Pharmaceutics 2022; 14:pharmaceutics14050920. [PMID: 35631506 PMCID: PMC9144985 DOI: 10.3390/pharmaceutics14050920] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 12/11/2022] Open
Abstract
Zein- and chitosan-based nanoparticles have been described as promising carrier systems for food, biomedical and pharmaceutical applications. However, the manufacture of size-controlled zein and chitosan particles is challenging. In this study, an adapted anti-solvent nanoprecipitation method was developed. The effects of the concentration of zein and chitosan and the pH of the collection solution on the properties of the zein–honey–chitosan nanoparticles were investigated. Flash nanoprecipitation was demonstrated as a rapid, scalable, single-step method to achieve the self-assembly of zein–honey–chitosan nanoparticles. The nanoparticles size was tuned by varying certain formulation parameters, including the total concentration and ratio of the polymers. The zein–honey–chitosan nanoparticles’ hydrodynamic diameter was below 200 nm and the particles were stable for 30 days. Vitamin C was used as a hydrophilic model substance and efficiently encapsulated into these nanoparticles. This study opens a promising pathway for one-step producing zein–honey–chitosan nanoparticles by flash nanoprecipitation for hydrophilic compounds’ encapsulation.
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Affiliation(s)
- Jorge Loureiro
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, Av. Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (J.L.); (S.P.M.); (M.P.R.)
| | - Sónia P. Miguel
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, Av. Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (J.L.); (S.P.M.); (M.P.R.)
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Inês J. Seabra
- Bioengineering Department, Lehigh University, Bethlehem, PA 18015, USA;
| | - Maximiano P. Ribeiro
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, Av. Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (J.L.); (S.P.M.); (M.P.R.)
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Paula Coutinho
- CPIRN-IPG—Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, Av. Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (J.L.); (S.P.M.); (M.P.R.)
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
- Correspondence: ; Tel.: +351-965544187
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Miguel SP, Loureiro J, Ribeiro MP, Coutinho P. Osmundea sp. macroalgal polysaccharide-based nanoparticles produced by flash nanocomplexation technique. Int J Biol Macromol 2022; 204:9-18. [PMID: 35122803 DOI: 10.1016/j.ijbiomac.2022.01.180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 12/29/2022]
Abstract
The macroalgae-derived polysaccharides' biological potential has been explored due to their attractive intrinsic properties such as biocompatibility, biodegradability, and their ability to conjugate with other compounds. In particular, in the drug delivery systems field, the anionic macroalgae polysaccharides have been combined with cationic compounds through ionotropic gelation and/or bulk mixing. However, these techniques did not assure reproducibility, and the stability of nanoparticles is undesired. To overcome these limitations, herein, the polysaccharide extracted from Osmundea sp. was used to produce nanoparticles through the flash nanocomplexation technique. This approach rapidly mixed the negative charge of macroalgae polysaccharide with a positive chitosan charge on a millisecond timescale. Further, diclofenac (an anti-inflammatory drug) was also incorporated into complex nanoparticles. Overall, the gathered data showed that hydrodynamic diameter nanoparticles values lower than 100 nm, presenting a narrow size distribution and stability. Also, the diclofenac exhibited a targeted and sustained release profile in simulating inflammatory conditions. Likewise, the nanoparticles showed excellent biological properties, evidencing their suitability to be used to treat inflammatory skin diseases.
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Affiliation(s)
- Sónia P Miguel
- CPIRN-UDI/IPG, Centro de Potencial e Inovação em Recursos Naturais, Unidade de Investigação para o Desenvolvimento do Interior do Instituto Politécnico da Guarda, Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Jorge Loureiro
- CPIRN-UDI/IPG, Centro de Potencial e Inovação em Recursos Naturais, Unidade de Investigação para o Desenvolvimento do Interior do Instituto Politécnico da Guarda, Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal
| | - Maximiano P Ribeiro
- CPIRN-UDI/IPG, Centro de Potencial e Inovação em Recursos Naturais, Unidade de Investigação para o Desenvolvimento do Interior do Instituto Politécnico da Guarda, Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Paula Coutinho
- CPIRN-UDI/IPG, Centro de Potencial e Inovação em Recursos Naturais, Unidade de Investigação para o Desenvolvimento do Interior do Instituto Politécnico da Guarda, Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal.
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Rodrigues DA, Miguel SP, Loureiro J, Ribeiro M, Roque F, Coutinho P. Oromucosal Alginate Films with Zein Nanoparticles as a Novel Delivery System for Digoxin. Pharmaceutics 2021; 13:pharmaceutics13122030. [PMID: 34959312 PMCID: PMC8706652 DOI: 10.3390/pharmaceutics13122030] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/16/2021] [Accepted: 11/25/2021] [Indexed: 12/30/2022] Open
Abstract
Digoxin is a hydrophobic drug used for the treatment of heart failure that possesses a narrow therapeutic index, which raises safety concerns for toxicity. This is of utmost relevance in specific populations, such as the elderly. This study aimed to demonstrate the potential of the sodium alginate films as buccal drug delivery system containing zein nanoparticles incorporated with digoxin to reduce the number of doses, facilitating the administration with a quick onset of action. The film was prepared using the solvent casting method, whereas nanoparticles by the nanoprecipitation method. The nanoparticles incorporated with digoxin (0.25 mg/mL) exhibited a mean size of 87.20 ± 0.88 nm, a polydispersity index of 0.23 ± 0.00, and a zeta potential of 21.23 ± 0.07 mV. Digoxin was successfully encapsulated into zein nanoparticles with an encapsulation efficiency of 91% (±0.00). Films with/without glycerol and with different concentrations of ethanol were produced. The sodium alginate (SA) films with 10% ethanol demonstrated good performance for swelling (maximum of 1474%) and mechanical properties, with a mean tensile strength of 0.40 ± 0.04 MPa and an elongation at break of 27.85% (±0.58), compatible with drug delivery application into the buccal mucosa. The current study suggests that SA films with digoxin-loaded zein nanoparticles can be an effective alternative to the dosage forms available on the market for digoxin administration.
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Affiliation(s)
- Daniela A. Rodrigues
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
| | - Sónia P. Miguel
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
- Health Sciences Research Centre, University of Beira Interior (CICS-UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Jorge Loureiro
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
| | - Maximiano Ribeiro
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
- Health Sciences Research Centre, University of Beira Interior (CICS-UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Fátima Roque
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
- Health Sciences Research Centre, University of Beira Interior (CICS-UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Paula Coutinho
- Center of Potential and Innovation in Natural Resources, Research Unit for Inland Development, Polytechnic Institute of Guarda (CPIRN-UDI/IPG), Avenida Dr. Francisco de Sá Carneiro, No. 50, 6300-559 Guarda, Portugal; (D.A.R.); (S.P.M.); (J.L.); (M.R.); (F.R.)
- Health Sciences Research Centre, University of Beira Interior (CICS-UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
- Correspondence: ; Tel.: +351-965544187
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Ferreira J, Freitas A, Loureiro J, Beringuilho M, Faria D, Roque D, Morais C. P862 A conservative strategy for a frequently fatal post-myocardial infarction mechanical complication. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
A 88-year-old female was admitted for an anterior ST-segment elevation myocardial infarction (STEMI). Patient had a history of intermittent chest pain for 2 days with worsening on the day of admission. Electrocardiogram (ECG) at admission showed ST-segment elevation on leads from V2 to V6 and leads DI and aVL. Initial observation on the emergency department was described as unremarkable apart from the chest pain. Aspirin and Ticagrelor loading doses were administered and patient underwent emergent coronary angiography, which showed left anterior descendent artery occlusion after the emergence of second diagonal branch. Coronary angioplasty of this lesion was tried, with a total of 3 drug-eluted stents implantation but with no success as in the end there was no reflow of the artery.
Patient was then admitted on cardiac intensive care unit, and on observation at that time there was a remarking holosystolic murmur. Transthoracic echocardiogram showed (apart from left ventricle systolic disfunction with akinesia of the apical segments as well as middle segments of the interventricular septum (IVS) and anterior wall) an apical IVS defect with a left to right shunt with a gradient of around 50mmHg evaluated by Doppler, and no signs of right ventricle overload. Case was promptly discussed with cardiothoracic surgery and it was decided that she was not a candidate to urgent surgical intervention. Patient had an initial evolution in Killip class II, and remained hemodynamically stable for the rest of the admission, having no signs of heart failure on discharge at 17 days later. Serial ETTs during admission and at discharge were similar to the evaluation performed at admission.
In the meanwhile, during admission, case was discussed in multidisciplinary heart team with cardiothoracic surgery and interventional cardiology. Given the favourable evolution and comorbidities and frailty of the patient it was decided to adopt a conservative strategy with medical follow-up, only considering intervention if there was worsening of heart failure. Until now, with 4 months follow-up, patient remains in New York Heart Association (NYHA) functional class I.
Discussion
Post-myocardial infarction ventricular septal defect (VSD) is a complication that, regardless of the treatment strategy has a high mortality rate, especially when patient presents in cardiogenic shock. However, when patient is stable and especially when comorbidities imposes a high interventional risk medical treatment can be an option. So far, this is a successful case of a medically managed post-myocardial infarction VSD.
Abstract P862 Figure. Ventricular Septal Defect
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Affiliation(s)
- J Ferreira
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - A Freitas
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - J Loureiro
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - M Beringuilho
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - D Faria
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - D Roque
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - C Morais
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
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Beringuilho M, Simoa G, Baltazar J, Faria D, Loureiro J, Freitas A. P875 A suspected case of extra-pulmonary tuberculosis presenting as effusive-constrictive pericarditis. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.1189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Case presentation
A 33 year-old black female, born in Angola, staying in Portugal 1 week before admission presented to the emergency department of our hospital with a history of worsening but recurring pleuritic chest accompanied by dyspnea, fatigue, peripheral oedema and sweating in the past 4 years. Initial workup in Angola and more recently in Namibia was unrevealing. The patient had taken 3 months of antituberculous agents and a systemic corticosteroid and was medicated with furosemide and spironolactone. Since then the symptoms persisted and multiple admissions for decompensated heart failure followed. At presentation median blood pressure was 60mmHg, heart rate 90 beats per minute, temperature 37,6ºC. Auscultation had signs of pulmonary congestion and muffled heart sounds, the neck veins were distended. An electrocardiogram showed sinus rhythm and low-voltage complexes in limb and precordial leads. Initial transthoracic echocardiogram revealed a thickened pericardium with circunferencial effusion and marked respiratory variation (>25%) of the mitral and tricuspid inflow doppler velocities. Pericardiocentesis was performed with improved dyspnea and blood pressure after drainage of 650 mL of serohematic fluid. Echocardiographic follow-up showed a mild circunferencial pericardial effusion and extensive areas of thickened crypted pericardium with fibrin strands containing heterogeneous fluid (figure 1). There were signs of constriction. A cardiac CT revealed no calcium deposition. Fluid cytology was predominant for lymphocytes and biochemistry, cultures, polymerase chain reaction and immunochemistry were inconclusive and no pathologic agent was isolated. The image findings in the transthoracic echocardiogram coupled with the demographics and past clinical history of the patient prompt the initiation of antituberculous therapy in association with systemic corticosteroids in an attempt to ameliorate the pericardial constriction. Despite initial therapeutic response, constriction was deemed irreversible and pericardiectomy was performed. The workup for definitive diagnosis is still undergoing.
Discussion
Effusive-constrictive pericarditis is defined by a pericardial effusion with signs of concurrent pericardial constriction. In these cases the scarred pericardium not only constricts cardiac volume but can also accommodate pericardial fluid under increased pressure leading to signs of cardiac tamponade. The initial approach should be the treatment of the underlying condition but if such remains ineffective, pericardiectomy is the remaining option and is reserved for patients in which constriction becomes severe and/or persistent. This condition is more prevalent with tuberculous pericarditis and when suspected presumptive treatment should be initiated in immunocompetent patients from endemic regions. Antituberculous treatment regimens in conjunction with systemic corticosteroids have shown to prevent complications from pericardial constriction.
Abstract P875 Figure.
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Affiliation(s)
- M Beringuilho
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - G Simoa
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - J Baltazar
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - D Faria
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - J Loureiro
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
| | - A Freitas
- Hospital Prof Fernando da Fonseca EPE, Amadora, Portugal
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Teixeira P, Santos AC, Casalta-Lopes J, Almeida M, Loureiro J, Ermida V, Caldas J, Fontes-Ribeiro C. Prevalence of vitamin D deficiency amongst soccer athletes and effects of 8 weeks supplementation. J Sports Med Phys Fitness 2018; 59:693-699. [PMID: 30411595 DOI: 10.23736/s0022-4707.18.08551-1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND High prevalence of vitamin D deficiency is well known around the world in risk populations. Although less is known about the athletic population, some studies report vitamin D deficiency amongst athletic population and adequate vitamin D levels are crucial for athletic population as they can prevent injuries such as stress fractures and might even have ergogenic effects for example on muscle function. The main objectives were to evaluate the basal serum levels of 25(OH)D and calcium in professional soccer athletes on the latitude 40°N, to evaluate the effects in 25(OH)D and calcium serum levels following supplementation of 1667 IU/day of cholecalciferol during a period of 8 weeks and evaluate eventual toxicity arising from it. METHODS Twenty-eight professional athletes were evaluated according to the skin type. Basal serum levels of 25(OH)D and calcium were evaluated during winter months. Athletes were then supplemented with cholecalciferol 25.000 IU every two weeks. Serum levels of 25(OH)D and calcium were evaluated after supplementation. RESULTS 25(OH)D initially ranged between 9.9 ng/mL and 32.9 ng/mL with a median of 19.2 IQR 7.24 ng/mL. A statistically significant inverse correlation exists between vitamin D deficiency and the Fitzpatrick Scale (ρ=-0.555 P=0.003). After 8 weeks, 25(OH)D ranged between 10.6 ng/mL and 43.4 ng/mL with a median of 33.2 ng/mL IQR 6.1 ng/mL. We verified a statistically significant increase of serum 25(OH) D levels (11.74±5.988; CI 95% [9,02; 14,47]; P<0.001. In addition, there was a statistically significant reduction of calcium: -0.36±0.457; CI 95% [- 0.57; -0.15]; P=0.002. CONCLUSIONS Professional athletes have a high prevalence of vitamin D deficiency. Supplementation with cholecalciferol in winter months during 8 weeks is safe and effective in raising 25(OH)D serum levels. However, it may not be sufficient for athletes to reach adequate vitamin D levels.
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Affiliation(s)
- Pedro Teixeira
- Department of Physical and Rehabilitation Medicine, Hospital of Tondela-Viseu Hospital, Viseu, Portugal - .,Department of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal -
| | - Ana C Santos
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.,Institute for Innovation and Health Research, Group Genetics of Cognitive Dysfunction, Institute for Molecular and Cell Biology, Porto, Portugal
| | - João Casalta-Lopes
- Department of Radiation Oncology, University Hospital of Coimbra, Coimbra, Portugal.,Faculty of Medicine, Institute of Biophysics, University of Coimbra, Coimbra, Portugal
| | - Marco Almeida
- Hospitals of the Nord Vaudois, Pompaples, Switzerland
| | - Jorge Loureiro
- Department of Clinical Pathology, Hospital of Tondela-Viseu Hospital, Viseu, Portugal
| | - Vera Ermida
- Department of Physical and Rehabilitation Medicine, Hospital of Tondela-Viseu Hospital, Viseu, Portugal
| | - Jorge Caldas
- Department of Physical and Rehabilitation Medicine, Hospital of Tondela-Viseu Hospital, Viseu, Portugal
| | - Carlos Fontes-Ribeiro
- Department of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Marques I, Loureiro J, Draper D, Castro M, Castro S. How much do we know about the frequency of hybridisation and polyploidy in the Mediterranean region? Plant Biol (Stuttg) 2018; 20 Suppl 1:21-37. [PMID: 28963818 DOI: 10.1111/plb.12639] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 09/25/2017] [Indexed: 06/07/2023]
Abstract
Natural hybridisation and polyploidy are currently recognised as drivers of biodiversity, despite early scepticism about their importance. The Mediterranean region is a biodiversity hotspot where geological and climatic events have created numerous opportunities for speciation through hybridisation and polyploidy. Still, our knowledge on the frequency of these mechanisms in the region is largely limited, despite both phenomena are frequently cited in studies of Mediterranean plants. We reviewed information available from biodiversity and cytogenetic databases to provide the first estimates of hybridisation and polyploidy frequency in the Mediterranean region. We also inspected the most comprehensive modern Mediterranean Flora (Flora iberica) to survey the frequency and taxonomic distribution of hybrids and polyploids in Iberian Peninsula. We found that <6% of Mediterranean plants were hybrids, although a higher frequency was estimated for the Iberian Peninsula (13%). Hybrids were concentrated in few families and in even fewer genera. The overall frequency of polyploidy (36.5%) was comparable with previous estimates in other regions; however our estimates increased when analysing the Iberian Peninsula (48.8%). A surprisingly high incidence of species harbouring two or more ploidy levels was also observed (21.7%). A review of the available literature also showed that the ecological factors driving emergence and establishment of new entities are still poorly studied in the Mediterranean flora, although geographic barriers seem to play a major role in polyploid complexes. Finally, this study reveals several gaps and limitations in our current knowledge about the frequency of hybridisation and polyploidy in the Mediterranean region. The obtained estimates might change in the future with the increasing number of studies; still, rather than setting the complete reality, we hope that this work triggers future studies on hybridisation and polyploidy in the Mediterranean region.
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Affiliation(s)
- I Marques
- Department of Agricultural and Environmental Sciences, High Polytechnic School of Huesca, University of Zaragoza, Huesca, Spain
| | - J Loureiro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - D Draper
- Centro de Ecologia, Evolução e Alterações Ambientais (cE3c), Universidade de Lisboa, Lisbon, Portugal
- UBC Botanical Garden & Centre for Plant Research, and Department of Botany, University of British Columbia, Vancouver, Canada
| | - M Castro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - S Castro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
- Botanic Garden of the University of Coimbra, Coimbra, Portugal
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16
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Muñoz-Pajares AJ, Perfectti F, Loureiro J, Abdelaziz M, Biella P, Castro M, Castro S, Gómez JM. Niche differences may explain the geographic distribution of cytotypes in Erysimum mediohispanicum. Plant Biol (Stuttg) 2018; 20 Suppl 1:139-147. [PMID: 28741843 DOI: 10.1111/plb.12605] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/18/2017] [Indexed: 05/26/2023]
Abstract
Polyploidisation has played an important role in plant diversification, and variation in ploidy level may be found not only between species of the same genus, but also within a single species. Although establishing the adaptive significance of polyploidy to explain the geographic distribution of cytotypes is challenging, the occurrence of different cytotypes in different ecological niches may suggest an adaptive role of genome duplication. We studied the adaptive significance of the geographic distribution of cytotypes across the entire distribution range of the endemic Erysimum mediohispanicum (Brassicaceae). For that, we have used climate variables, population elevation and soil properties to model ecological niches for the different cytotypes. In addition, we analysed the effect that ploidy level has on the floral phenotype. We found a clear geographic pattern in the distribution of cytotypes, with diploid individuals occurring in the southernmost part of the distribution range, while tetraploids were found in the northern area. A contact (mosaic) zone between both cytotypes was identified, but diploids and tetraploids occur in sympatry in only one population (although in a highly unbalanced proportion). Gene flow between different cytotypes seems to be negligible, as evident from an almost complete absence of triploids and other minority cytotypes. Niches occupied by both cytotypes showed subtle, but significant differences, even in the contact zone. Precipitation was higher in regions occupied by tetraploid individuals, which present wider corolla tubes and thinner but taller stalks than diploids. Our findings highlight the potential role of polyploidy in the ecological adaptation of E. mediohispanicum to both abiotic factors and biotic interactions.
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Affiliation(s)
- A J Muñoz-Pajares
- Plant Biology, CIBIO/InBio, Centro de Investigação em Biodiversidade e Recursos Genéticos, Laboratório Associado, Universidade do Porto, Vairão, Portugal
- Departamento de Genetica, Universidad de Granada, Granada, Spain
| | - F Perfectti
- Departamento de Genetica, Universidad de Granada, Granada, Spain
| | - J Loureiro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - M Abdelaziz
- Departamento de Genetica, Universidad de Granada, Granada, Spain
| | - P Biella
- Departamento de Ecologıa, Universidad de Granada, Granada, Spain
- Department of Zoology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
- Institute of Entomology, Biology Centre of the Academy of Sciences of the Czech Republic, České Budějovice, Czech Republic
| | - M Castro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - S Castro
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - J M Gómez
- Departamento de Ecologıa, Universidad de Granada, Granada, Spain
- Estación Experimental de Zonas Aridas (EEZA-CSIC), Almería, Spain
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Novo Matos J, Pereira N, Glaus T, Wilkie L, Borgeat K, Loureiro J, Silva J, Law V, Kranjc A, Connolly DJ, Luis Fuentes V. Transient Myocardial Thickening in Cats Associated with Heart Failure. J Vet Intern Med 2017; 32:48-56. [PMID: 29243322 PMCID: PMC5787177 DOI: 10.1111/jvim.14897] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 10/25/2017] [Accepted: 11/07/2017] [Indexed: 12/17/2022] Open
Abstract
Background Cats with hypertrophic cardiomyopathy (HCM) and congestive heart failure (CHF) can have resolution of both left ventricular hypertrophy and CHF. Objectives To describe the clinical characteristics of cats with transient myocardial thickening (TMT) and CHF compared with a control population of cats without resolution of HCM. Animals A total of 21 cats with TMT, 21 cats with HCM. Methods Retrospective study. Clinical records at 4 veterinary centers were searched for TMT cases and a control group of cats with HCM and CHF. TMT was defined as initial maximal left ventricular wall thickness (LVWT) ≥6 mm with left‐sided CHF, with subsequent resolution of CHF, reduction in left atrium/aorta (LA/Ao), and LVWT<5.5 mm. HCM was defined as persistent LVWT ≥6 mm. Results Cats with TMT were younger (2 [0.4–11.4] years) than cats with HCM (8 [1.6–14] years) (P < 0.0001), and antecedent events were more common (15/21 versus 6/21, respectively) (P = 0.01). In cats with TMT, LVWT normalized from 6.8 [6.0–9.7] mm to 4.8 [2.8–5.3] mm and LA/Ao decreased from 1.8 [1.6–2.3] to 1.45 [1.2–1.7] after a mean interval of 3.3 (95% CI: 1.8–4.7) months. CHF recurred in 1 of 21 TMT and 15 of 21 cats with HCM. Cardiac treatment was discontinued in 20 of 21 cats with TMT and 0 of 21 HCM cats. All cats with TMT survived, whereas 8 of 19 cats with HCM died during the study period. Conclusions and Clinical Importance TMT occurs in younger cats, and antecedent events are common. The prognosis is better in cats with CHF associated with TMT than HCM.
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Affiliation(s)
- J Novo Matos
- Royal Veterinary College, University of London, Hatfield, UK.,Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - N Pereira
- Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - T Glaus
- Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - L Wilkie
- Royal Veterinary College, University of London, Hatfield, UK
| | - K Borgeat
- Highcroft Veterinary Referrals, Bristol, UK
| | - J Loureiro
- North Downs Specialists Referrals, Surrey, UK
| | - J Silva
- North Downs Specialists Referrals, Surrey, UK
| | - V Law
- Royal Veterinary College, University of London, Hatfield, UK
| | - A Kranjc
- Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - D J Connolly
- Royal Veterinary College, University of London, Hatfield, UK
| | - V Luis Fuentes
- Royal Veterinary College, University of London, Hatfield, UK
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Garcia Vives E, Ramentol M, Segarra A, Martínez-Valle F, Loureiro J, Agraz I, Solans-Laque R. AB0639 Influence of Infections on the Prognosis of Anca Associated Vasculitis (AAV). Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2051] [Citation(s) in RCA: 1] [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: 11/03/2022]
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Nogueira L, Brandão S, Matos E, Nunes RG, Loureiro J, Ferreira HA, Ramos I. Diffusion-weighted imaging: determination of the best pair of b-values to discriminate breast lesions. Br J Radiol 2014; 87:20130807. [PMID: 24834475 DOI: 10.1259/bjr.20130807] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE In breast diffusion-weighted imaging (DWI), the apparent diffusion coefficient (ADC) is used to discriminate between malignant and benign lesions. As ADC estimates can be affected by the weighting factors, our goal was to determine the optimal pair of b-values for discriminating breast lesions at 3.0 T. METHODS 152 females with 157 lesions (89 malignant and 68 benign) underwent breast MRI, including a DWI sequence sampling six b-values 50, 200, 400, 600, 800 and 1000 s mm(-2). ADC values were computed from different pairs of b-values and compared with ADC obtained by fitting the six b-values using a mono-exponential diffusion model (ADCall). Cut-off ADC values were determined and diagnostic performance evaluated by receiver operating characteristic analysis using Youden statistics. Mean ADCs were determined for normal tissue and lesions. Differences were evaluated by lesion and histological types. RESULTS Considering the cut-off values 1.46 and 1.49 × 10(3)mm(2) s(-1), the pairs 50, 1000 and 200, 800 s mm(-2) showed the highest accuracy, 77.5% and 75.4% with areas under the curve 84.4% and 84.2%, respectively. The best pair for ADC quantification was 50, 1000 s mm(-2) with 38/49 true-negative and 69/89 true-positive cases respectively; mean ADCs were 1.86 ± 0.46, 1.77 ± 0.37 and 1.15 ± 0.46 × 10(-3) mm(2) s(-1) for normal, benign and malignant lesions. There were no significant differences in these ADC values when compared with ADCall (ADC calculated from the full set of b - values) [difference = 0.0075 × 10(-3) mm(2) s(-1); confidence interval 95%: (-0.0036; 0.0186); p = 0.18]. CONCLUSION The diagnostic performance in differentiating malignant and benign lesions was most accurate for the b-value pair 50, 1000 s mm(-2). ADVANCES IN KNOWLEDGE The best b-value pair for lesion discrimination and characterization through ADC quantification was 50, 1000 s mm(-2).
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Affiliation(s)
- L Nogueira
- 1 Department of Radiology, School of Allied Health Sciences, Oporto Polytechnic Institute (ESTSP/IPP), Vila Nova de Gaia, Portugal
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Costa J, Ferrero V, Loureiro J, Castro M, Navarro L, Castro S. Sexual reproduction of the pentaploid, short-styled Oxalis pes-caprae allows the production of viable offspring. Plant Biol (Stuttg) 2014; 16:208-14. [PMID: 23594049 DOI: 10.1111/plb.12010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 05/23/2012] [Accepted: 12/31/2012] [Indexed: 05/13/2023]
Abstract
Reproduction is a key factor for the successful establishment and spread of introduced species. Oxalis pes-caprae is a tristylous species with a self- and morph-incompatibility sexual system that, in the invaded range of the western Mediterranean Basin, has been found to reproduce asexually because only the pentaploid, short-styled morph (5x S-morph) was introduced. The objective of this study was to test the ability of the 5x S-morph of O. pes-caprae to produce viable offspring in the absence of compatible mates, exploring the hypothesis that new morphs could have emerged by sexual reproduction events of the initially introduced morph. Pollen germination, pollen tube development, fruit and seed production, seed germination and offspring ploidy levels were analysed after controlled hand-pollinations to assess self- and morph-incompatibility and production of viable gametes by the 5x S-morph. The self-incompatibility system is still operating, but a partial breakdown in the morph-incompatibility system combined with the production of viable gametes was observed, allowing sexual reproduction of the 5x S-morph in the invaded range. The ability of the 5x S-morph to reproduce sexually may have major consequences for the dynamics of invasive populations of O. pes-caprae and could be one of the factors involved in the occurrence of new floral morphs in this invaded range.
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Affiliation(s)
- J Costa
- Department of Life Sciences, Centre for Functional Ecology (CFE), University of Coimbra, Coimbra, Portugal
| | - V Ferrero
- Department of Life Sciences, Centre for Functional Ecology (CFE), University of Coimbra, Coimbra, Portugal
- Department of Plant Biology, Faculty of Science, University of Vigo, Vigo, Spain
| | - J Loureiro
- Department of Life Sciences, Centre for Functional Ecology (CFE), University of Coimbra, Coimbra, Portugal
| | - M Castro
- Department of Life Sciences, Centre for Functional Ecology (CFE), University of Coimbra, Coimbra, Portugal
| | - L Navarro
- Department of Plant Biology, Faculty of Science, University of Vigo, Vigo, Spain
| | - S Castro
- Department of Life Sciences, Centre for Functional Ecology (CFE), University of Coimbra, Coimbra, Portugal
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Dassis M, Rodríguez DH, Ieno EN, Denuncio PE, Loureiro J, Davis RW. Resting metabolic rate and heat increment of feeding in juvenile South American fur seals (Arctocephalus australis). Comp Biochem Physiol A Mol Integr Physiol 2013; 168:63-8. [PMID: 24269958 DOI: 10.1016/j.cbpa.2013.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 11/08/2013] [Accepted: 11/13/2013] [Indexed: 11/26/2022]
Abstract
Bio-energetic models used to characterize an animal's energy budget require the accurate estimate of different variables such as the resting metabolic rate (RMR) and the heat increment of feeding (HIF). In this study, we estimated the in air RMR of wild juvenile South American fur seals (SAFS; Arctocephalus australis) temporarily held in captivity by measuring oxygen consumption while at rest in a postabsorptive condition. HIF, which is an increase in metabolic rate associated with digestion, assimilation and nutrient interconversion, was estimated as the difference in resting metabolic rate between the postabsorptive condition and the first 3.5h postprandial. As data were hierarchically structured, linear mixed effect models were used to compare RMR measures under both physiological conditions. Results indicated a significant increase (61%) for the postprandial RMR compared to the postabsorptive condition, estimated at 17.93±1.84 and 11.15±1.91mL O2 min(-1)kg(-1), respectively. These values constitute the first estimation of RMR and HIF in this species, and should be considered in the energy budgets for juvenile SAFS foraging at-sea.
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Affiliation(s)
- M Dassis
- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CONICET, Funes 3350, 7600 Mar del Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, PB, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina.
| | - D H Rodríguez
- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CONICET, Funes 3350, 7600 Mar del Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, PB, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina
| | - E N Ieno
- Highland Statistics Ltd., P.O. Box 82, Av. Escandinavia 72, 03130, Spain
| | - P E Denuncio
- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CONICET, Funes 3350, 7600 Mar del Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, PB, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina
| | - J Loureiro
- Fundación Mundo Marino, Avenida Décima N° 157, 6-7105 San Clemente del Tuyú, Argentina
| | - R W Davis
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Ocean and Coastal Studies Building, Galveston, TX 77553, USA
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Baptista SB, Loureiro J, Brizida L, Magno P, Leal P, Lourenco E, Monteiro C, Nedio M, Farto E Abreu P, Gil V. Contrast-induced hyperemia in the functional evaluation of coronary lesions with a pressure wire. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3971] [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: 11/14/2022] Open
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Baptista SB, Loureiro J, Brizida L, Magno P, Leal P, Lourenco E, Monteiro C, Nedio M, Farto E Abreu P, Gil V. Resting Pd/Pa and fractional flow reserve: do we need to obtain maximal hyperemia in all patients? Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3968] [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: 11/14/2022] Open
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Summerfield NJ, Boswood A, O'Grady MR, Gordon SG, Dukes-McEwan J, Oyama MA, Smith S, Patteson M, French AT, Culshaw GJ, Braz-Ruivo L, Estrada A, O'Sullivan ML, Loureiro J, Willis R, Watson P. Efficacy of pimobendan in the prevention of congestive heart failure or sudden death in Doberman Pinschers with preclinical dilated cardiomyopathy (the PROTECT Study). J Vet Intern Med 2012; 26:1337-49. [PMID: 23078651 PMCID: PMC3546380 DOI: 10.1111/j.1939-1676.2012.01026.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [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: 04/26/2012] [Revised: 07/30/2012] [Accepted: 09/11/2012] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND The benefit of pimobendan in delaying the progression of preclinical dilated cardiomyopathy (DCM) in Dobermans is not reported. HYPOTHESIS That chronic oral administration of pimobendan to Dobermans with preclinical DCM will delay the onset of CHF or sudden death and improve survival. ANIMALS Seventy-six client-owned Dobermans recruited at 10 centers in the UK and North America. METHODS The trial was a randomized, blinded, placebo-controlled, parallel group multicenter study. Dogs were allocated in a 1:1 ratio to receive pimobendan (Vetmedin capsules) or visually identical placebo. The composite primary endpoint was prospectively defined as either onset of CHF or sudden death. Time to death from all causes was a secondary endpoint. RESULTS The proportion of dogs reaching the primary endpoint was not significantly different between groups (P = .1). The median time to the primary endpoint (onset of CHF or sudden death) was significantly longer in the pimobendan (718 days, IQR 441-1152 days) versus the placebo group (441 days, IQR 151-641 days) (log-rank P = 0.0088). The median survival time was significantly longer in the pimobendan (623 days, IQR 491-1531 days) versus the placebo group (466 days, IQR 236-710 days) (log-rank P = .034). CONCLUSION AND CLINICAL IMPORTANCE The administration of pimobendan to Dobermans with preclinical DCM prolongs the time to the onset of clinical signs and extends survival. Treatment of dogs in the preclinical phase of this common cardiovascular disorder with pimobendan can lead to improved outcome.
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Affiliation(s)
- N J Summerfield
- North Downs Specialist Referrals, Bletchingley, Surrey, RH1 4QP, UK
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Castro S, Loureiro J, Procházka T, Münzbergová Z. Cytotype distribution at a diploid-hexaploid contact zone in Aster amellus (Asteraceae). Ann Bot 2012; 110:1047-55. [PMID: 22887024 PMCID: PMC3448430 DOI: 10.1093/aob/mcs177] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 06/26/2012] [Indexed: 05/10/2023]
Abstract
BACKGROUND AND AIMS The present study aims to assess the diversity and distribution of cytotypes of Aster amellus in central and eastern Europe, contributing with data to improve understanding of the evolutionary dynamics of the contact zone between diploids and hexaploids of this polyploid complex. METHODS Large-scale cytotype screening of 4720 individuals collected in 229 populations was performed using 4',6-diamidino-2-phenylindole (DAPI) flow cytometry. Fine-scale cytotype screening was performed in the mixed-ploidy population. Reproductive variables, such as number of florets per flower head, seed set and seedling emergence, as well as ploidy level of seeds and seedlings were recorded in this population. KEY RESULTS The diploid-hexaploid contact zone is large and complex, reaching the Czech Republic in the west, Austria in the south, Poland in the north-east and Romania in the extreme east of the surveyed areas. Most populations presented only one cytotype, either diploid or hexaploid. In several areas of the contact zone both cytotypes were found to grow in parapatry. One mixed-ploidy population of diploids and hexaploids was detected for the first time, but no signs of hybridization were detected. In this population, diploids had a significantly lower reproductive success, and significantly higher production of intercytotype offspring, being in reproductive disadvantage in comparison with hexaploids. CONCLUSIONS The contact zone of diploid and hexaploid A. amellus in central and eastern Europe seems to be highly dynamic and diffuse, with both primary and secondary contacts being possible. The obtained results suggest the origin of hexaploids through diploids, overall supporting previous hypotheses that this species is autopolyploid. Data from the only mixed-ploidy population detected so far suggest that the minority cytotype exclusion is an important evolutionary mechanisms driving the prevalence of single-cytotype populations, and thus contributing to the current distributional patterns of the cytotypes of A. amellus.
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Affiliation(s)
- S Castro
- CFE, Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal.
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Lino da Silva M, Loureiro J, Guerra V. A multiquantum dataset for vibrational excitation and dissociation in high-temperature O2–O2 collisions. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.01.074] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Freitas PP, Cardoso FA, Martins VC, Martins SAM, Loureiro J, Amaral J, Chaves RC, Cardoso S, Fonseca LP, Sebastião AM, Pannetier-Lecoeur M, Fermon C. Spintronic platforms for biomedical applications. Lab Chip 2012; 12:546-557. [PMID: 22146898 DOI: 10.1039/c1lc20791a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Since the fundamental discovery of the giant magnetoresistance many spintronic devices have been developed and implemented in our daily life (e.g. information storage and automotive industry). Lately, advances in the sensors technology (higher sensitivity, smaller size) have potentiated other applications, namely in the biological area, leading to the emergence of novel biomedical platforms. In particular the investigation of spintronics and its application to the development of magnetoresistive (MR) biomolecular and biomedical platforms are giving rise to a new class of biomedical diagnostic devices, suitable for bench top bioassays as well as point-of-care and point-of-use devices. Herein, integrated spintronic biochip platforms for diagnostic and cytometric applications, hybrid systems incorporating magnetoresistive sensors applied to neuroelectronic studies and biomedical imaging, namely magneto-encephalography and magneto-cardiography, are reviewed. Also lab-on-a-chip MR-based platforms to perform biological studies at the single molecule level are discussed. Overall the potential and main characteristics of such MR-based biomedical devices, comparing to the existing technologies while giving particular examples of targeted applications, are addressed.
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Affiliation(s)
- P P Freitas
- Instituto de Engenharia de Sistemas e Computadores-Microsistemas e Nanotecnologias, Rua Alves Redol, 9, 1000-029 Lisbon, Portugal
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Abstract
Although conventional state-of-the-art flow cytometry systems provide rapid and reliable analytical capacities, they are bulky, expensive and complex. To overcome these drawbacks modern flow cytometers have been developed with enhanced portability for on-site measurements. Unlike external fluorescent/optical detectors, magnetoresistive sensors are micro-fabricated, can be integrated within microfluidic channels, and can detect magnetically labelled cells. This work describes the real-time detection of single magnetically labelled cells with a magnetoresistive based cell cytometer. For Kg1-a cells magnetically labelled with 50 nm CD34 microbeads (Milteny) flowing through a 150 μm wide, 14 μm high microchannel, with speeds around 1 cm s(-1), bipolar signals with an average amplitude of 10-20 μV were observed corresponding to cell events. The number of cells counted by the spin valve cytometer has been compared with that obtained with a hemocytometer. Both methods agree within the respective error bars.
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Affiliation(s)
- J Loureiro
- INESC-MN Instituto de Engenharia de Sistemas e Computadores-Microsistemas e Nanotecnologias, Rua Alves Redol no. 9, 1000-029, Lisbon, Portugal.
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Bussolati B, Moggio A, Collino F, Grange C, Camussi G, Cantaluppi V, Gatti S, Medica D, Figliolini F, Bruno S, Deregibus MC, Sordi A, Biancone L, Tetta C, Segoloni GP, Camussi G, Castellano G, Curci C, Stasi A, Cariello M, Loverre A, Simone S, Tataranni T, Ditonno P, Lucarelli G, Battaglia M, Crovace A, Staffieri F, Gesualdo L, Schena FP, Grandaliano G, Kim S, Heo NJ, Lee JW, Oh YK, Na KY, Joo KW, Earm JH, Han JS, Loureiro J, Aguilera A, Selgas R, Sandoval P, Albar-Vizcaino P, Perez-Lozano ML, Ruiz-Carpio V, Borras-Cuesta F, Dotor J, Lopez-Cabrera M, Henley C, Davis J, Lee P, Wong S, Salyers K, Wagner M, Jung J, Nguyen H, van der Valk M, Jackson J, Serafino R, Jin L, Willcockson M, Ward S, Turk J, Lu JYL, Fu A, Richards W, Reagan JD, Medina J, Li AR, Liu J. Experimental models. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.7] [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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Loureiro J, Amorim J. Possibility of nonexistence of hot and superhot hydrogen atoms in electrical discharges. Phys Rev E 2011; 82:035401. [PMID: 21230132 DOI: 10.1103/physreve.82.035401] [Citation(s) in RCA: 11] [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] [Received: 04/19/2010] [Revised: 08/04/2010] [Indexed: 11/07/2022]
Abstract
Recently, the existence of extremely energetic hydrogen atoms in electrical discharges has been proposed in the literature with large controversy, from the analysis of the anomalous broadening of hydrogen Balmer lines. In this paper, the velocity distribution of H atoms and the profiles of the emitting atom lines created by the exothermic reaction H2++H{2}→H{3}{+}+H+ΔE are calculated, as a function of the internal energy defect ΔE . The shapes found for the non-Maxwell-Boltzmann distributions resulting in non-Gaussian line profiles raise serious arguments against the existence of hot and superhot H atoms as it has been proposed, at least with those temperatures.
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Affiliation(s)
- J Loureiro
- Instituto de Plasmas e Fusão Nuclear-Laboratório Associado, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal.
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Monteiro MS, Rodriguez E, Loureiro J, Mann RM, Soares AMVM, Santos C. Flow cytometric assessment of Cd genotoxicity in three plants with different metal accumulation and detoxification capacities. Ecotoxicol Environ Saf 2010; 73:1231-7. [PMID: 20663557 DOI: 10.1016/j.ecoenv.2010.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 03/24/2010] [Accepted: 06/26/2010] [Indexed: 05/29/2023]
Abstract
Cadmium (Cd) is a widespread environmental contaminant, strongly mutagenic and known to cause DNA damage in plants. In this work, flow cytometry (FCM) was applied to determine if in vivo exposure to Cd would induce genotoxic effects at the genome level. The hyper-accumulator Thlaspi caerulescens (J. & C. Presl), the related non-accumulator Thlaspi arvense L. and the accumulator crop species Lactuca sativa L. were germinated in distilled water and grown in modified Hoagland's medium with increasing concentrations of Cd(NO3)2 (0, 1, 10 and 100 microM). After 28 days of exposure, shoot and root growth was recorded and the tissues were harvested for Cd and FCM analysis. In general, roots from treated plants contained higher content of Cd than leaves and growth inhibition was observed in the treated plants. Nuclear DNA content was estimated and the G0/G1 full peak coefficient of variation (FPCV), as an indicator of clastogenic damage, was recorded. In T. arvense and T. caerulescens no significant differences were detected between control and exposed plants. Leaves of L. sativa exposed to 10 microM Cd presented a statistically significant increase in FPCV values in comparison with the control group. Furthermore, roots exposed to 100 microM Cd presented a reduction in nuclear DNA content and an increase in FPCV when compared to the control. FCM data indicates that no major DNA damage was induced on both Cd-exposed Thlaspi species and L. sativa leaves. On the contrary, results obtained with L. sativa roots suggests clastogenic damage in these organs exposed to 100 microM of Cd.
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Affiliation(s)
- M S Monteiro
- CESAM & Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal.
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Loureiro J, Burrow R, Dukes-McEwan J. Canine intrapericardial cyst - complicated surgical correction of an unusual cause of right heart failure. J Small Anim Pract 2010; 50:492-7. [PMID: 19769671 DOI: 10.1111/j.1748-5827.2009.00759.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intrapericardial cysts are non-neoplastic structures that can become clinically significant by compressing cardiac chambers. Surgical excision is recommended to resolve clinical signs and this has been reported to be easily achieved by blunt manipulation. The present report describes a case of an intrapericardial cyst in a dog. The singularity of this case lays on the fact that the patient was presented unusually late, at the age of four years, and most importantly that its surgical correction was significantly complicated by the strong adherence of the cyst to both the pericardium and epicardium. This was possibly the result of chronic trauma and continued haemorrhage with subsequent healing and fibrosis. It is therefore important to consider intrapericardial cysts as a possible differential diagnosis in young to middle age patients presented with signs of right-sided heart failure. Surgical excision must be planned carefully as this may not be as straightforward as previously suggested.
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Affiliation(s)
- J Loureiro
- Small Animal Teaching Hospital, University of Liverpool, Wirral
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Faustino I, Shvets Y, Loureiro J, Leal C, Soares R, Couto R, Pereira D, Sousa S, Afonso N, Rodrigues H. 163 Typical medullary carcinoma of the breast: experience of a single institution. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70194-4] [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: 11/28/2022] Open
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Kopecký D, Havránková M, Loureiro J, Castro S, Lukaszewski A, Bartoš J, Kopecká J, Doležel J. Physical Distribution of Homoeologous Recombination in Individual Chromosomes of Festuca pratensis in Lolium multiflorum. Cytogenet Genome Res 2010; 129:162-72. [DOI: 10.1159/000313379] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Raffan E, Loureiro J, Dukes-McEwan J, Fonfara S, James R, Swift S, Bexfield N, Herrtage M, Archer J. The Cardiac Biomarker NT-proBNP Is Increased in Dogs with Azotemia. J Vet Intern Med 2009; 23:1184-9. [DOI: 10.1111/j.1939-1676.2009.0373.x] [Citation(s) in RCA: 20] [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: 10/20/2022] Open
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Goizet C, Boukhris A, Maltete D, Guyant-Maréchal L, Truchetto J, Mundwiller E, Hanein S, Jonveaux P, Roelens F, Loureiro J, Godet E, Forlani S, Melki J, Auer-Grumbach M, Fernandez JC, Martin-Hardy P, Sibon I, Sole G, Orignac I, Mhiri C, Coutinho P, Durr A, Brice A, Stevanin G. SPG15 is the second most common cause of hereditary spastic paraplegia with thin corpus callosum. Neurology 2009; 73:1111-9. [PMID: 19805727 DOI: 10.1212/wnl.0b013e3181bacf59] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Hereditary spastic paraplegias (HSPs) are very heterogeneous inherited neurodegenerative disorders. Our group recently identified ZFYVE26 as the gene responsible for one of the clinical and genetic entities, SPG15. Our aim was to describe its clinical and mutational spectra. METHODS We analyzed all exons of SPG15/ZFYVE26 gene by direct sequencing in a series of 60 non-SPG11 HSP subjects with associated mental or MRI abnormalities, including 30 isolated cases. The clinical data were collected through the SPATAX network. RESULTS We identified 13 novel truncating mutations in ZFYVE26, 12 of which segregated at the homozygous or compound heterozygous states in 8 new SPG15 families while 1 was found at the heterozygous state in a single family. Two of 3 splice site mutations were validated on mRNA of 2 patients. The SPG15 phenotype in 11 affected individuals was characterized by early onset HSP, severe progression of the disease, and mental impairment dominated by cognitive decline. Thin corpus callosum and white matter hyperintensities were MRI hallmarks of the disease in this series. CONCLUSIONS The mutations are truncating, private, and distributed along the entire coding sequence of ZFYVE26, which complicates the analysis of this gene in clinical practice. In our series of patients with hereditary spastic paraplegia-thin corpus callosum, the largest analyzed so far, SPG15 was the second most frequent form (11.5%) after SPG11. Both forms share similar clinical and imaging presentations with very few distinctions, which are, however, insufficient to infer the molecular diagnosis when faced with a single patient.
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Cristóvão R, Tavares A, Loureiro J, Boaventura R, Macedo E. Modelling the decolourisation of a simulated textile effluent by commercial laccase. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.445] [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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Fonfara S, Loureiro J, Swift S, James R, Cripps P, Dukes-McEwan J. Cardiac troponin I as a marker for severity and prognosis of cardiac disease in dogs. Vet J 2009; 184:334-9. [PMID: 19703781 DOI: 10.1016/j.tvjl.2009.04.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [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: 11/01/2008] [Revised: 03/31/2009] [Accepted: 04/02/2009] [Indexed: 11/20/2022]
Abstract
The use of cardiac troponin I (cTnI) to assess the severity of disease and prognosis in 120 dogs presented for cardiac evaluation was analysed. cTnI concentrations were measured using a commercially available assay. Dogs were placed into three groups: group 1, cTnI0.15ng/mL; group 2, cTnI 0.151-1.0ng/mL; group 3, cTnI>1.01ng/mL. Dogs in group 1 were significantly younger (P<0.0001) and had no or stable cardiac diseases and longest survival times, whereas those in groups 2 and 3 had severe cardiac diseases and significantly reduced survival times (P<0.0001). Thirty dogs with initially increased cTnI concentrations had a repeat assay less than 2months later with significant reductions in cTnI concentrations (P=0.005). Initial cTnI concentrations could not differentiate dogs that survived in group 3 from those that did not. However, dogs that survived showed significant cTnI reductions (P=0.015) in the repeated assay in contrast to the dogs that died (P=0.22). It was concluded that cTnI is useful in assessing the prognosis and severity of cardiac diseases in dogs, and progression and response to treatment can be assessed by repeat sampling. cTnI concentrations >1.0ng/mL and persistent increases in cTnI concentrations are indicators of a poor prognosis in dogs with cardiac disease.
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Affiliation(s)
- S Fonfara
- Small Animal Teaching Hospital, University of Liverpool, Neston, School of Veterinary Science, Leahurst, Neston CH64 7TE, UK.
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Kutasi K, Pintassilgo CD, Loureiro J. An overview of modelling of low-pressure post-discharge systems used for plasma sterilization. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/162/1/012008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lino da Silva M, Loureiro J, Guerra V. Nonequilibrium dissociation and recombination rates in nitrogen: From shock waves to discharge conditions. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2009.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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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Abstract
OBJECTIVE The purpose of this study was to investigate whether implantable loop recorders could be used in the diagnosis of unexplained collapse in dogs. METHODS The medical records of six dogs presented to the University of Liverpool Small Animal Teaching Hospital between May 2003 and October 2006 for further evaluation of intermittent syncopal episodes, collapse or episodic weakness, were reviewed. All these dogs underwent standard investigations and had implantable loop recorders placed. RESULTS A provisional diagnosis of supraventricular tachycardia was made in one dog, and diagnoses of exclusion of arrhythmogenic right ventricular cardiomyopathy and idiopathic epilepsy was made in two dogs. One dog suffered no further syncopal episodes, a diagnosis was not reached in another dog and the final dog was lost to follow-up. CLINICAL SIGNIFICANCE The implantable loop recorder can be used successfully for the diagnosis of unexplained collapse in dogs.
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Affiliation(s)
- R James
- University of Liverpool, Small Animal Teaching Hospital, Chester High Road, Leahurst, Neston CH64 7TE
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Loureiro J, Smith S, Fonfara S, Swift S, James R, Dukes-McEwan J. Canine dynamic left ventricular outflow tract obstruction: assessment of myocardial function and clinical outcome. J Small Anim Pract 2008; 49:578-86. [PMID: 18684141 DOI: 10.1111/j.1748-5827.2008.00623.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aims of this study were (i) to evaluate echocardiographic findings and myocardial function including pulsed wave tissue Doppler imaging in dogs with naturally occurring dynamic left ventricular outflow tract obstruction and (ii) to investigate the clinical outcome and response to therapy in these dogs. METHODS Two cases were retrospectively reviewed and three cases were prospectively evaluated including clinical findings, diagnostic test results (including standard Doppler echocardiography and pulsed wave tissue Doppler imaging), response to treatment and outcome. The two retrospective cases received no treatment. Other cases were treated with a beta-blocker. RESULTS All dogs had a variable intensity left apical systolic murmur. Concentric left ventricular hypertrophy, systolic anterior motion of the mitral valve and scimitar-shaped left ventricular outflow tract Doppler flow profile were present in all cases. Pulsed wave tissue Doppler imaging interrogation of the interventricular septum revealed E'/A' reversal in all but one patient. Regression of left ventricular hypertrophy and total resolution of the dynamic left ventricular outflow tract obstruction were observed in all cases. CLINICAL SIGNIFICANCE Young dogs are affected with a possible terrier breed predisposition. Dynamic left ventricular outflow tract obstruction may be distinguished from canine hypertrophic cardiomyopathy as progressive resolution of echocardiographic abnormalities was documented. Pulsed wave tissue Doppler imaging abnormalities provide further evidence for significant diastolic dysfunction associated with the hypertrophy.
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Affiliation(s)
- J Loureiro
- The Scarsdale Veterinary Hospital, Derby, UK 45/47 Kedleston Road, Derby DE221FN
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Lino da Silva M, Guerra V, Loureiro J, Sá P. Vibrational distributions in N2 with an improved calculation of energy levels using the RKR method. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2008.02.048] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Martins VC, Cardoso FA, Loureiro J, Mercier M, Germano J, Cardoso S, Ferreira R, Fonseca LP, Sousa L, Piedade MS, Freitas PP, Ionescu A, Anthony J, Bland C. Integrated Spintronic Platforms for Biomolecular Recognition Detection. ACTA ACUST UNITED AC 2008. [DOI: 10.1063/1.2956811] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Boswood A, Dukes-McEwan J, Loureiro J, James RA, Martin M, Stafford-Johnson M, Smith P, Little C, Attree S. The diagnostic accuracy of different natriuretic peptides in the investigation of canine cardiac disease. J Small Anim Pract 2007; 49:26-32. [PMID: 18005104 DOI: 10.1111/j.1748-5827.2007.00510.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES We aimed to validate and determine the accuracy of a new sandwich ELISA for canine N-terminal pro-B-type natriuretic peptide (NT-proBNP) in the discrimination of canine patients with cardiac disease from those with respiratory disease and to determine the effect of confounding variables on NT-proBNP concentrations. METHODS Validation studies for the new assay were undertaken. Concentrations of N-terminal atrial natriuretic peptide (NT-proANP) and NT-proBNP in both ethylenediaminetetraacetic acid (EDTA) plasma and serum were estimated in samples from 77 dogs at a laboratory blinded to the clinical status of the patient. The diagnostic accuracy of the each sample type and test was evaluated using receiver operating characteristic curves. The effect of age, gender and indicators of renal function was evaluated using a multivariate regression analysis. RESULTS Concentrations of NT-proBNP in both serum and plasma accurately discriminated dogs with respiratory disease from those with cardiac disease, with an optimum cut-off concentration of 210 pmol/l. NT-proBNP concentrations were unaffected by sample type. Increasing creatinine concentration is associated with increasing concentration of NT-proBNP. Age and gender were not found to have significant effects on natriuretic peptide concentrations in this population. CLINICAL SIGNIFICANCE Canine NT-proBNP appears to be a useful marker of the presence of cardiac disease, although concentrations must be interpreted in the light of the patient's renal function.
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Affiliation(s)
- A Boswood
- Department of Veterinary Clinical Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK
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Loureiro J, Rodriguez E, Gomes A, Santos C. Genome size estimations on Ulmus minor Mill., Ulmus glabra Huds., and Celtis australis L. using flow cytometry. Plant Biol (Stuttg) 2007; 9:541-4. [PMID: 17642035 DOI: 10.1055/s-2007-965165] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The Ulmaceae family is composed of nearly 2000 species widely distributed in the northern hemisphere. Despite their wide distribution area, there are only four native species in the Iberian Peninsula. In this work the genome size of three of those species (ULMUS MINOR, U. GLABRA, and CELTIS AUSTRALIS) was estimated using flow cytometry. The nuclear DNA content of C. AUSTRALIS was estimated as 2.46 +/- 0.061 pg/2C, of U. MINOR as 4.25 +/- 0.158 pg/2C, and of U. GLABRA as 4.37 +/- 0.103 pg/2C of DNA. No statistically significant differences were detected among individuals of the same species. These species revealed to be problematic for flow cytometric analyses, due to the release of mucilaginous compounds into the nuclear suspension. Despite that, the modified protocol here presented ensured high quality analyses (low coefficient of variation and background debris and nuclear fluorescence stability), opening good perspectives on its application to estimate the genome size of species with similar problems.
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Affiliation(s)
- J Loureiro
- Laboratory of Biotechnology and Cytomics, CESAM, Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal.
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Leal F, Loureiro J, Rodriguez E, Pais MS, Santos C, Pinto-Carnide O. Nuclear DNA content of Vitis vinifera cultivars and ploidy level analyses of somatic embryo-derived plants obtained from anther culture. Plant Cell Rep 2006; 25:978-85. [PMID: 16614867 DOI: 10.1007/s00299-006-0162-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2005] [Revised: 03/02/2006] [Accepted: 03/25/2006] [Indexed: 05/08/2023]
Abstract
Flow cytometry was employed to determine the ploidy level of Vitis vinifera L. somatic embryo-derived plants obtained from anther culture. Only one among the 41 analysed plants (2.4%) presented somaclonal variation (tetraploidy); the other plants were diploid. No significant differences (P<or=0.05) were detected between diploid and parental field plants. No haploid or aneuploid plants were observed. The nuclear DNA content of nine V. vinifera cultivars was also estimated using flow cytometry. A non-significant variation was found among the cultivars, with DNA content ranging from 1.17 pg/2C (cv. 'Tinta Barroca' and 'Viosinho') to 1.26 pg/2C (cv. 'Cabernet Sauvignon'). These results and previous studies on other Vitis species suggest that Vitis genome is stable with regard to nuclear DNA content.
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Affiliation(s)
- F Leal
- Center of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
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Kopecký D, Loureiro J, Zwierzykowski Z, Ghesquière M, Dolezel J. Genome constitution and evolution in Lolium x Festuca hybrid cultivars (Festulolium). Theor Appl Genet 2006; 113:731-42. [PMID: 16832647 DOI: 10.1007/s00122-006-0341-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Accepted: 06/03/2006] [Indexed: 05/10/2023]
Abstract
Festulolium hybrids are being increasingly used worldwide as forage grasses. This is due to their superior agronomic characteristics, which combine yield performance of ryegrasses (Lolium multiflorum and L. perenne) and tolerance against abiotic stress of fescues (Festuca pratensis, F. arundinacea and F. arundinacea var. glaucescens). Despite the widespread use, only fragmentary information exists on their genomic constitution. We used genomic in situ hybridization (GISH) to analyze genomic constitution of over 600 plants from almost all commercially available cultivars of Festulolium. Our results revealed a surprisingly large range of variation in the proportions of parental genomes and in the extent of intergenomic recombination. Using fluorescence in situ hybridization (FISH) with probes for ribosomal DNA, we assessed the frequency of recombination and elimination of particular chromosomes and chromosome groups in three contrasting Festulolium cultivars. This study provides novel information that will aid in understanding the relationship between a genetic make-up and the phenotype of Festulolium hybrids. Our results indicate that GISH might be a useful tool to aid in Festulolium breeding and provide data for a more detailed description of registered cultivars.
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Affiliation(s)
- D Kopecký
- Laboratory of Molecular Cytogenetics and Cytometry, Institute of Experimental Botany, Sokolovská 6, 77200 Olomouc, Czech Republic.
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