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Guerra A, Azevedo A, Amorim F, Soares J, Neuparth T, Santos MM, Martins I, Colaço A. Using a food web model to predict the effects of Hazardous and Noxious Substances (HNS) accidental spills on deep-sea hydrothermal vents from the Mid-Atlantic Ridge (MAR) region. Mar Pollut Bull 2024; 199:115974. [PMID: 38176164 DOI: 10.1016/j.marpolbul.2023.115974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/06/2024]
Abstract
Deep-sea hydrothermal vents host unique ecosystems but face risks of incidents with Hazardous and Noxious Substances (HNS) along busy shipping lanes such as the transatlantic route. We developed an Ecopath with Ecosim (EwE) model of the Menez Gwen (MG) vent field (MG-EwE) (Mid-Atlantic Ridge) to simulate ecosystem effects of potential accidental spills of four different HNS, using a semi-Lagrangian Dispersion Model (sLDM) coupled with the Regional Ocean Modelling System (ROMS) calibrated for the study area. Food web modelling revealed a simplified trophic structure with low energy efficiency. The MG ecosystem was vulnerable to disruptions caused by all tested HNS, yet it revealed some long-term resilience. Understanding these impacts is vital for enhancing Spill Prevention, Control, and Countermeasure plans (SPCC) in remote marine areas and developing tools to assess stressors effects on these invaluable habitats.
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Affiliation(s)
- A Guerra
- IMAR Institute of Marine Research, University of the Azores, Rua Prof Frederico Machado, 9901-862 Horta, Portugal; CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal.
| | - A Azevedo
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal
| | - F Amorim
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal
| | - J Soares
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal; AIR Centre, TERINOV-Parque de Ciência e Tecnologia da Ilha Terceira, Canada de Belém S/N, Terra Chã, 9700-702 Angra do Heroísmo, Portugal
| | - T Neuparth
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal
| | - M M Santos
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal; FCUP, Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - I Martins
- CIMAR/CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Porto, Portugal.
| | - A Colaço
- Institute of Marine Sciences, Okeanos, University of the Azores, Rua Prof Frederico Machado, 9901-862 Horta, Portugal
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Salas-Fajardo MY, Benavides J, Azevedo A, Figueiras P, Monteiro M, Orge L, Mendonça P, Carvalho P, Waap H, Ortega-Mora LM, Calero-Bernal R. Fatal toxoplasmosis in a captive squirrel monkey (Saimiri boliviensis) in Portugal. Vet Res Commun 2023; 47:2363-2370. [PMID: 37474881 DOI: 10.1007/s11259-023-10179-x] [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: 04/28/2023] [Accepted: 07/14/2023] [Indexed: 07/22/2023]
Abstract
New World monkeys are especially vulnerable to develop severe clinical manifestations and succumb to acute toxoplasmosis. This study aimed to describe the histopathological findings and genotypic characterization of the Toxoplasma gondii strain involved in a lethal case occurring in a zoo-housed black-capped squirrel monkey (Saimiri boliviensis) in Portugal. Cyst-like structures suggestive of Sarcocystidae parasites and acute injuries in liver and brain were observed by light microscopy examination. By immunohistochemistry, calprotectin, T. gondii antigen and Iba1 antigen had a positive signaling in lung, liver and brain tissues. Toxoplasma gondii B1, ITS1 and 529 repetitive element fragments amplifications together with the genotyping of 13 microsatellite markers confirmed a systemic T. gondii infection linked to a non-clonal type II strain. This description is consistent to the majority T. gondii strains circulating in Europe.
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Affiliation(s)
- Martha Ynés Salas-Fajardo
- SALUVET, Department of Animal Health, Faculty of Veterinary, Complutense University of Madrid, Madrid, 28040, Spain
| | - Julio Benavides
- Instituto de Ganadería de Montaña, (CSIC-ULE), Grulleros, León, 24346, Spain
| | - Alexandre Azevedo
- Zoo de Lagos, Lagos, 8600-013, Portugal
- CIVG - Vasco da Gama Research Center / Vasco da Gama University School, Coimbra, 3020-210, Portugal
- Centre for Interdisciplinary Research in Animal Health (CIISA), Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | | | - Madalena Monteiro
- Pathology Laboratory, UEISPSA, National Institute for Agricultural and Veterinary Research (INIAV), I.P, Oeiras, 2780- 157, Portugal
| | - Leonor Orge
- Pathology Laboratory, UEISPSA, National Institute for Agricultural and Veterinary Research (INIAV), I.P, Oeiras, 2780- 157, Portugal
- Animal and Veterinary Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, 5000- 801, Portugal
| | - Paula Mendonça
- Pathology Laboratory, UEISPSA, National Institute for Agricultural and Veterinary Research (INIAV), I.P, Oeiras, 2780- 157, Portugal
| | - Paulo Carvalho
- Pathology Laboratory, UEISPSA, National Institute for Agricultural and Veterinary Research (INIAV), I.P, Oeiras, 2780- 157, Portugal
| | - Helga Waap
- Parasitology Laboratory, UEISPSA, National Institute for Agricultural and Veterinary Research (INIAV), I.P, Oeiras, 2780- 157, Portugal
| | - Luis Miguel Ortega-Mora
- SALUVET, Department of Animal Health, Faculty of Veterinary, Complutense University of Madrid, Madrid, 28040, Spain
| | - Rafael Calero-Bernal
- SALUVET, Department of Animal Health, Faculty of Veterinary, Complutense University of Madrid, Madrid, 28040, Spain.
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Tovar LR, Sus B, Azevedo A, Lailson-Brito J, Bisi TL. Mercury toxicology in Epinephelidae fishes: A multiple tissue approach in two groupers species from southwestern Atlantic (SE-Brazil). Mar Pollut Bull 2023; 191:114967. [PMID: 37121186 DOI: 10.1016/j.marpolbul.2023.114967] [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: 07/14/2022] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 05/13/2023]
Abstract
Epinephelidae fishes are important to reef ecosystems, as well as for commercial fishing and cultural heritage. Additionally, most of these species are at some risk of extinction, as Epinephelus marginatus and Hyporthodus nigritus. This study aimed to determine total mercury (THg) concentrations and burden on eight tissues of E. marginatus and H. nigritus. A Cold Vapor/Atomic Absorption Spectrometer was used for the THg determination. THg concentrations and burden varied significantly between tissues in both species. The highest concentrations were determined in the liver, and the greatest burden was in muscle. The gonad concentrations were higher than the toxicological threshold. General trends of increase in THg concentrations and burden along growth were observed. Mercury is a threat for both species evaluated, raising this concern for other Epinephelidae species.
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Affiliation(s)
- Lucas Rodrigues Tovar
- Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-013, Brazil.
| | - Bruna Sus
- Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-013, Brazil
| | - Alexandre Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-013, Brazil
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-013, Brazil
| | - Tatiana Lemos Bisi
- Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-013, Brazil
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Azevedo A, Roque R, Passos J, Nunes S, Migueis J, Faria C, Sagarribay A, Serpa A, Roque L, Mafra M, Salgado D. P04.02.A Integrated diagnosis and therapeutic decision of pediatric nervous system tumors using a comprehensive genomic profiling test. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.117] [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: 11/13/2022] Open
Abstract
Abstract
Background
Nervous system tumors (NST) are one of the leading causes of cancer-related death in children. Next-generation sequencing has enabled the identification of an increasing number of genetic markers, allowing for a more accurate diagnosis, and may help guide clinicians towards a more specific therapeutic approach.
Material and Methods
Retrospective cohort study of pediatric and young adult patients with NST analyzed with FoundationOneHeme® (FOH) panel from March 2020 to April 2021. This panel was requested, in addition to previously performed pathological reviews and routine genetic tests, in order to obtain more accurate diagnoses and/or possible therapeutic targets.
Results
Fifty NST were analyzed with FOH panel, corresponding to 49 patients. Median age at NST diagnosis was 13 years (range 0-23 years); 50% were females. Initial diagnoses were: 10 pilocytic astrocytomas, 10 diffuse gliomas, 5 ependymomas, 6 mixed neuronal-glial tumors, 7 embryonal tumors, 3 meningeal tumors, 5 peripheral nervous system tumors (PNST) and 4 other types of tumors. There was a change in the final integrated diagnosis after performing the FOH panel in 10 patients (1 pilocytic astrocytoma, 3 diffuse gliomas, 4 mixed neuronal-glial tumors and 1 PNST). In thirty patients, at least one possible therapeutic target was identified: in 5 patients the target therapies are approved for the patients’ tumor type; in 20 patients, target therapies are approved for the same mutations in other tumor types; and in 30 patients target therapies are still being evaluated in ongoing clinical trials. After the results of the FOH panel were known, the previous therapeutic approach was changed in 15 patients, but in only 4 this was attributed to the new genomic findings.
Conclusion
Comprehensive genomic profiling tests can improve diagnostic accuracy and allow for a more reliable approach to the management of pediatric patients with nervous system tumors. Although in most patients there was no immediate therapeutic application of the potential targets found, the genomic data obtained could be very useful to patients who may have tumor progressions in the future.
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Affiliation(s)
- A Azevedo
- IPOFG Lisboa , Lisbon , Portugal
- Faculdade de Ciencias da Saude, UBI , Covilha , Portugal
| | - R Roque
- Centro Hospitalar de Lisboa Norte , Lisbon , Portugal
| | - J Passos
- IPOFG Lisboa , Lisbon , Portugal
| | - S Nunes
- IPOFG Lisboa , Lisbon , Portugal
| | | | - C Faria
- Centro Hospitalar de Lisboa Norte , Lisbon , Portugal
| | - A Sagarribay
- Centro Hospitalar e Universitario de Lisboa Central , Lisbon , Portugal
| | - A Serpa
- IPOFG Lisboa , Lisbon , Portugal
| | - L Roque
- IPOFG Lisboa , Lisbon , Portugal
| | - M Mafra
- Centro Hospitalar e Universitario de Lisboa Central , Lisbon , Portugal
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Santos RM, Petry AC, Sousa VL, Souza HO, Azevedo A, Soares AR, Weber LI. Acute and subchronic effects of petroleum on the freshwater fish Hoplias aff. malabaricus. BRAZ J BIOL 2022; 84:e253731. [DOI: 10.1590/1519-6984.253731] [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] [Received: 06/29/2021] [Accepted: 10/19/2021] [Indexed: 11/22/2022] Open
Abstract
Abstract Petroleum water soluble fraction (WSF) impairs organisms, but damages may vary among cell and tissue levels. The aim of the present study was to evaluate the acute (24 h, 48 h, 72 h) and subchronic effects (36 days) of WSF (0%, 25% and 100%) in juveniles of the Neotropical top predator fish Hoplias aff. malabaricus. The effects of WSF were evaluated at a molecular level using the comet assay and micronucleus test for genome damage; and at a morphological level through histological identification of liver pathologic lesions. In both acute and subchronic exposure we found low levels of DNA damage (< 10% of comet tail) and non-significant frequency of micronucleus in WSF exposed fish. The most significant liver lesions in WSF exposed fish were fatty vacuolization, hypertrophy and focal necrosis. Since these tissue injuries were progressive and persistent, their irreversibility may negatively affect fish recruitment, even in a such resistant top predator.
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Affiliation(s)
| | - A. C. Petry
- Universidade Federal do Rio de Janeiro, Brasil
| | | | - H. O. Souza
- Universidade Federal do Rio de Janeiro, Brasil
| | - A. Azevedo
- Universidade Federal do Rio de Janeiro, Brasil
| | | | - L. I. Weber
- Universidade Federal do Rio de Janeiro, Brasil
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Azevedo A, Guimarães L, Ferraz J, Whiting M, Magalhães-Sant’Ana M. Pet Reptiles-Are We Meeting Their Needs? Animals (Basel) 2021; 11:ani11102964. [PMID: 34679983 PMCID: PMC8533019 DOI: 10.3390/ani11102964] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 01/05/2023] Open
Abstract
Simple Summary Little is known about the ability of reptile owners to meet the needs of their pet animals. In this study, 220 pet reptile owners in Portugal reported their knowledge of reptile behaviors and the provision of essential husbandry needs (temperature, lighting, diet and refuge). Although two-thirds of respondents scored very good to excellent in terms of interpreting their pet reptile’s behaviors, 85% failed to provide at least one of the four husbandry needs. Moreover, behaviors indicative of poor welfare and captivity stress were considered ‘normal’ by some respondents. These results suggest that many pet reptiles in Portugal live in, at best, ‘controlled deprivation’ and are at risk of suffering poor welfare throughout their lives. Despite this, none of the respondents reported their reptile’s welfare as very poor, and a single respondent reported it as poor. We suggest that poor welfare and abnormal behaviors in pet reptiles have become accepted as normal, precluding the search for ways to prevent them. These results suggest that campaigns aimed at challenging the current norm for adequate reptile welfare are warranted. In particular, the predominant view, propelled by the exotic pet industry, that reptiles are low-maintenance pets needs to be actively refuted. Abstract The ability to meet the needs of each species in captivity is at the heart of the ethical debate on the acceptability of keeping reptiles and other animals as pets. Little is known about the ability of reptile owners to understand their pets’ behavior and to meet their welfare requirements. In this study, we surveyed pet reptile owners in Portugal (N = 220) to assess their behavioral knowledge and the provision of essential husbandry needs. Although two-thirds of respondents (68%) scored very good to excellent in terms of knowledge of their pet reptile’s behaviors, only 15% of respondents met four essential reptile husbandry needs (temperature, lighting, diet and refuge) and 43% met two or less. None of the respondents reported their reptile’s welfare as very poor, and only a single respondent reported it as poor. Logistic regression model showed that while snake owners had fourteen times higher odds of reporting adequate husbandry provision, lizard owners had the highest odds of reporting good or very good welfare despite providing less of their animals’ basic husbandry needs. These results suggest that many pet reptiles in Portugal live in, at best, ‘controlled deprivation’ and are at risk of suffering poor welfare throughout their captive lives. Moreover, behaviors indicative of poor welfare and captivity stress were considered ‘normal’ by up to one quarter of respondents. We suggest that the frequency of these behaviors in pet reptiles has led to their acceptance as normal, precluding the search for ways to prevent them. These results suggest that campaigns aimed at challenging the current norm for adequate reptile welfare are warranted.
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Affiliation(s)
- Alexandre Azevedo
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal; (M.W.); (M.M.-S.)
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Correspondence:
| | - Leonor Guimarães
- CIVG—Vasco da Gama Research Centre, Department of Veterinary Sciences, Vasco da Gama University School, Avenida José R. Sousa Fernandes 197, 3020-210 Lordemão, Portugal;
- Exoclinic—Clínica Veterinária, Rua D. António Ribeiro, Nº1, Loja B, 1495-049 Algés, Portugal
| | - Joel Ferraz
- Centro Veterinário de Exóticos do Porto, Rua Arquitecto João Andresen 132, 4250-242 Porto, Portugal;
| | - Martin Whiting
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal; (M.W.); (M.M.-S.)
| | - Manuel Magalhães-Sant’Ana
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal; (M.W.); (M.M.-S.)
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Marques FM, Pfister V, Perobelli LLM, Santucci R, Buccheri V, Soares TB, Azevedo A, Gonçalves MV, Chiattone CS, Arrais-Rodrigues C. OUTCOMES OF PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA (CLL) ACCORDING TO THE REASONS FOR INITIATION OF FIRST-LINE TREATMENT: A RETROSPECTIVE ANALYSIS OF THE BRAZILIAN REGISTRY OF CLL. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Luís AR, May-Collado LJ, Rako-Gospić N, Gridley T, Papale E, Azevedo A, Silva MA, Buscaino G, Herzing D, dos Santos ME. Vocal universals and geographic variations in the acoustic repertoire of the common bottlenose dolphin. Sci Rep 2021; 11:11847. [PMID: 34088923 PMCID: PMC8178411 DOI: 10.1038/s41598-021-90710-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 07/16/2020] [Accepted: 04/29/2021] [Indexed: 02/04/2023] Open
Abstract
Acoustical geographic variation is common in widely distributed species and it is already described for several taxa, at various scales. In cetaceans, intraspecific variation in acoustic repertoires has been linked to ecological factors, geographical barriers, and social processes. For the common bottlenose dolphin (Tursiops truncatus), studies on acoustic variability are scarce, focus on a single signal type-whistles and on the influence of environmental variables. Here, we analyze the acoustic emissions of nine bottlenose dolphin populations across the Atlantic Ocean and the Mediterranean Sea, and identify common signal types and acoustic variants to assess repertoires' (dis)similarity. Overall, these dolphins present a rich acoustic repertoire, with 24 distinct signal sub-types including: whistles, burst-pulsed sounds, brays and bangs. Acoustic divergence was observed only in social signals, suggesting the relevance of cultural transmission in geographic variation. The repertoire dissimilarity values were remarkably low (from 0.08 to 0.4) and do not reflect the geographic distances among populations. Our findings suggest that acoustic ecology may play an important role in the occurrence of intraspecific variability, as proposed by the 'environmental adaptation hypothesis'. Further work may clarify the boundaries between neighboring populations, and shed light into vocal learning and cultural transmission in bottlenose dolphin societies.
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Affiliation(s)
- A. R. Luís
- grid.410954.d0000 0001 2237 5901MARE - Marine and Environmental Sciences Centre, ISPA - Instituto Universitário, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal ,Projecto Delfim - Centro Português de Estudo dos Mamíferos Marinhos, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal
| | - L. J. May-Collado
- grid.59062.380000 0004 1936 7689Department of Biology, University of Vermont, Burlington, VT 05403 USA ,grid.412889.e0000 0004 1937 0706Centro de Investigacion en Ciencias del Mar y Limnologia, Universidad de Costa Rica, San Jose, Costa Rica
| | - N. Rako-Gospić
- Blue World Institute of Marine Research and Conservation, Kaštel 24, 51551 Veli Lošinj, Croatia
| | - T. Gridley
- grid.7836.a0000 0004 1937 1151Centre for Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences, University of Cape Town, C/O Sea Search Research and Conservation NPC, Cape Town, South Africa
| | - E. Papale
- grid.5326.20000 0001 1940 4177Institute for the Study of Antropogenic Impacts and Sustainability in the Marine Environment, National Research Council, Capo Granitola, Via del Mare 3, 91021 Torretta Granitola (TP), Italy ,grid.7605.40000 0001 2336 6580Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123 Torino, Italy
| | - A. Azevedo
- grid.412211.5Laboratório de Mamíferos Aquáticos e Bioindicadores Profª Izabel Gurgel (MAQUA), Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - M. A. Silva
- grid.7338.f0000 0001 2096 9474OKEANOS & IMAR – Instituto do Mar, Universidade dos Açores, 9901-862 Horta, Portugal
| | - G. Buscaino
- grid.5326.20000 0001 1940 4177Institute for the Study of Antropogenic Impacts and Sustainability in the Marine Environment, National Research Council, Capo Granitola, Via del Mare 3, 91021 Torretta Granitola (TP), Italy
| | - D. Herzing
- Wild Dolphin Project, P.O. Box 8436, Jupiter, FL 33468 USA ,grid.255951.f0000 0004 0635 0263Department of Biological Sciences, Florida Atlantic University, Boca Raton, FL 33431 USA
| | - M. E. dos Santos
- grid.410954.d0000 0001 2237 5901MARE - Marine and Environmental Sciences Centre, ISPA - Instituto Universitário, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal ,Projecto Delfim - Centro Português de Estudo dos Mamíferos Marinhos, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal
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Galvao P, Sus B, Lailson-Brito J, Azevedo A, Malm O, Bisi T. An upwelling area as a hot spot for mercury biomonitoring in a climate change scenario: A case study with large demersal fishes from Southeast Atlantic (SE-Brazil). Chemosphere 2021; 269:128718. [PMID: 33189394 DOI: 10.1016/j.chemosphere.2020.128718] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/15/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
Data concerning the monomethylmercury (MeHg) bioaccumulation in marine biota from Southeast Atlantic Ocean are scarce. This study purchased large specimens of demersal fishes from an upwelling region: Warsaw grouper (Epinephelus nigritus), Dusky grouper (Epinephelus marginatus) and Namorado sandperch (Pseudopercis numida). The authors addressed the bioaccumulation and toxicokinetic of mercury in fish organs, and the toxicological risk for human consumption of this metal in the muscle tissues accessed. Additionally, the present study discussed the possible implications of shifts in key variables of the environment related to a climate-changing predicted scenario, to the mercury biomagnification in a tropical upwelling system. The muscle was the main stock of MeHg, although the highest THg concentrations have been found in liver tissue. Regarding the acceptable maximum level (ML = 1 mg kg-1), E. nigritus and E. marginatus showed 22% of the samples above this limit. Concerning P. numida, 77% were above 0.5 mg kg-1, but below the ML. The %MeHg in liver and muscle showed no significative correlations, which suggest independent biochemical pathways to the toxicokinetic of MeHg, and constrains the indirect assessment of the mercury contamination in the edible tissue by the liver analyses. The present study highlights the food web features of a tropical upwelling ecosystem that promote mercury biomagnification. Additionally, recent studies endorse the enhancement of upwelling phenomenon due to the climate global changes which boost the pumping of mercury enriched water to the oceanic upper layer. Therefore, the upwelling areas might be hot spots for MeHg monitoring in marine biota.
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Affiliation(s)
- Petrus Galvao
- Programa de Biofísica Ambiental, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, RJ, Brazil.
| | - Bruna Sus
- Laboratório de Mamíferos Aquáticos e Bioindicadores Prof(a). Izabel Gurgel (MAQUA), Faculdade de Oceanografia - Universidade do Estado do Rio de Janeiro, 20550-013, Rio de Janeiro, RJ, Brazil
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores Prof(a). Izabel Gurgel (MAQUA), Faculdade de Oceanografia - Universidade do Estado do Rio de Janeiro, 20550-013, Rio de Janeiro, RJ, Brazil
| | - Alexandre Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores Prof(a). Izabel Gurgel (MAQUA), Faculdade de Oceanografia - Universidade do Estado do Rio de Janeiro, 20550-013, Rio de Janeiro, RJ, Brazil
| | - Olaf Malm
- Programa de Biofísica Ambiental, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, RJ, Brazil
| | - Tatiana Bisi
- Laboratório de Mamíferos Aquáticos e Bioindicadores Prof(a). Izabel Gurgel (MAQUA), Faculdade de Oceanografia - Universidade do Estado do Rio de Janeiro, 20550-013, Rio de Janeiro, RJ, Brazil
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Oliveira HA, Azevedo A, Rubio J. Removal of flocculated TiO 2 nanoparticles by settling or dissolved air flotation. Environ Technol 2021; 42:1001-1012. [PMID: 31378156 DOI: 10.1080/09593330.2019.1650123] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
Engineered nanoparticles of TiO2 (TiO2-NPs) are used in the industry for a great number of applications. After their usage, the particles end up in aquatic environments, contaminating supply waters and watercourses. Bench-scale studies report removal of TiO2-NPs (450 nm, the mean volumetric diameter) by flocculation followed by settling or by dissolved air flotation (4 bar saturation pressure and 30% recycling ratio). Floc formation was conducted after heterocoagulation with iron hydroxide (30-40 mg L-1 Fe3+) and gelatinized corn starch (10-20 mg L-1) as flocculant, at pH 7. Particle size distribution and zeta potential, removal efficiencies as a function of time and microphotography of flocs were analyzed. Mechanisms involve ferric hydroxide precipitation, heterocoagulation with the nanoparticles and flocculation of the loaded carrier precipitates with gelatinized starch. Best results showed removals between 95-100% of TiO2-NPs, either by settling or flotation after 5 min. Clear treated waters with low turbidity < 3 nephelometric turbidity units (NTU) and TiO2-NPs concentrations <1 mg L-1 were obtained. A practical advantage in DAF was the higher solids content (1.9% w/w) of the sludge, when compared to settling (0.7% w/w). This would facilitate the sludge dewatering and disposal, but DAF has the disadvantage of the poor efficiency at high concentration of the nanoparticles of titanium oxide (>100 mg L-1). Conversely, the removal by settling of the flocs increased at high dosages. It is believed that both processes are sustainable in terms of reagents and the removal efficiencies of TiO2 nanoparticles from water.
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Affiliation(s)
- H A Oliveira
- Departamento de Engenharia de Minas Laboratório de Tecnologia Mineral e Ambiental (LTM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A Azevedo
- Departamento de Engenharia de Minas Laboratório de Tecnologia Mineral e Ambiental (LTM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - J Rubio
- Departamento de Engenharia de Minas Laboratório de Tecnologia Mineral e Ambiental (LTM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Azevedo A, Bailey L, Bandeira V, Fonseca C, Wauters J, Jewgenow K. Decreasing glucocorticoid levels towards the expansion front suggest ongoing expansion in a terrestrial mammal. Conserv Physiol 2021; 9:coab050. [PMID: 34249365 PMCID: PMC8253928 DOI: 10.1093/conphys/coab050] [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] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/02/2021] [Accepted: 06/11/2021] [Indexed: 05/11/2023]
Abstract
Understanding the causes of range expansions in abundant species can help predict future species distributions. During range expansions, animals are exposed to novel environments and are required to cope with new and unpredictable stressors. Glucocorticoids (GCs) are mediators of the hormonal and behavioural mechanisms allowing animals to cope with unpredictable changes in the environment and are therefore expected to differ between populations at expansion edge and the historic range. However, to date, very few studies have evaluated the relationship between GCs and range expansion. The Egyptian mongoose has been rapidly expanding its range in Portugal over the past 30 years. In this study, we applied an information theoretic approach to determine the most important spatial and environmental predictors of hair GCs (hGCs) in the population, after controlling for normal patterns of hGC variation in the species. We observed a decrease in hGC as distance from the historic range increased (i.e. closer to the expansion front). This distance term was present in all of the top models and had a 95% confidence interval (95% CI) that did not overlap with zero, strongly supporting its influence on hGC. We estimated a 0.031 pg/mg (95% CI: -0.057, -0.004) decrease in hGCs for each kilometre distance to the Tagus River, which was once the limit of the species' distribution. Our results indicate that the species' expansion is unlikely to be limited by mechanisms related to or mediated by the physiological stress response. The decrease in hGC levels towards the expansion edge coupled with limited evidence of a negative effect of human population density suggests that the species' northward expansion in Portugal could continue.
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Affiliation(s)
- Alexandre Azevedo
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Instituto de Ciências Biomédicas Abel Salazar - University of Porto, R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Corresponding author: Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315 Berlin, Germany.
| | - Liam Bailey
- Department of Evolutionary Genetics, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Victor Bandeira
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Carlos Fonseca
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
- ForestWISE - Collaborative Laboratory for Integrated Forest and Fire Management, Quinta de Prados, Campus da UTAD 5001-801 Vila Real, Portugal
| | - Jella Wauters
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Katarina Jewgenow
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
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Bandeira V, Virgós E, Azevedo A, Cunha M, Fonseca C. Association between reproduction and immunity in the Egyptian mongoose
Herpestes ichneumon
is sex‐biased and unaffected by body condition. J Zool (1987) 2020. [DOI: 10.1111/jzo.12842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- V. Bandeira
- Department of Biology & CESAM University of Aveiro Aveiro Portugal
| | - E. Virgós
- Departamento de Biología Geología Física y Química Inorgánica Área Biodiversidad y Conservación ESCET Universidad Rey Juan Carlos Móstoles Spain
| | - A. Azevedo
- Leibniz Institute for Zoo and Wildlife Research Berlin Germany
- Instituto de Ciências Biomédicas Abel Salazar Porto Portugal
| | - M.V. Cunha
- cE3c‐ Centre for Ecology, Evolution and Environmental Changes Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
- BioISI‐ Biosystems & Integrative Sciences Institute Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
| | - C. Fonseca
- Department of Biology & CESAM University of Aveiro Aveiro Portugal
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Diaz-Molina J, Martínez R, González-Vargas P, Calero L, Azevedo A, Conde C. Tisseel® versus Hemopatch® for dural sealing in neurosurgery. A prospective study in a tertiary center. Neurochirurgie 2020; 66:429-434. [PMID: 33091461 DOI: 10.1016/j.neuchi.2020.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 06/28/2020] [Accepted: 09/13/2020] [Indexed: 01/24/2023]
Abstract
BACKGROUND Dural repair is a potential source of complications in neurosurgery. We make a comparison in pseudomeningocele and CSF leak incidence with the sealants Tisseel® and Hemopatch®. METHODS We collected 147 patients from September 2017 to December 2018 in a prospective observational study. Inclusion criteria were adult patients with an intradural cranial or spinal surgery whose dura was closed with a fibrin sealant. Primary endpoints were the incidence of pseudo meningocele and CSF leak. Secondary endpoints were the surgical-site infection, epidural hematoma, and the influence of previous surgery. RESULTS In 65 and 82 patients Tisseel® and Hemopatch® were used as sealants respectively. The incidence of CSF leak presented a significant statistical relation with the use of Tisseel® in a univariate and multivariate analysis. Infratentorial surgery presented a higher incidence of pseudomeningocele and CSF leak, but the approach used was not a significant factor in multivariate analysis. Patients who were operated previously had a higher risk present a postoperative complication. CONCLUSIONS The incidence of pseudomeningocele and CSF leak was higher with Tisseel® compared with Hemopatch® with a statistic significant relation in case of CSF fistulae. The procedure done may be a confusion factor in our study. There was no report of adverse effects or a higher incidence of complications. However, it is recommended to plan randomized trials with larger samples to get stronger evidence.
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Affiliation(s)
- J Diaz-Molina
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain.
| | - R Martínez
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain
| | - P González-Vargas
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain
| | - L Calero
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain
| | - A Azevedo
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain
| | - C Conde
- Department of Neurosurgery, University Hospital Complex of Vigo, Vigo, Spain
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Martins I, Azevedo A, Goméz I, Valente L. Variation on the standing stock of Gracilaria sp. in a temperate estuary under single-stressor and multiple-stressor climate change scenarios. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102079] [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: 10/23/2022]
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15
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Azevedo A, Wauters J, Kirschbaum C, Serra R, Rivas A, Jewgenow K. Sex steroids and glucocorticoid ratios in Iberian lynx hair. Conserv Physiol 2020; 8:coaa075. [PMID: 32843969 PMCID: PMC7439579 DOI: 10.1093/conphys/coaa075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/10/2020] [Accepted: 07/26/2020] [Indexed: 05/20/2023]
Abstract
Knowledge on species' reproductive biology is a fundamental pre-requisite of every conservation effort, but is often lacking. Sex steroids can provide valuable information for the assessment of reproductive success, whereas glucocorticoids are used to assess adrenocortical activity and stress-related bodily adaption. However, due to their perilous condition, access to animals is often difficult, which makes hormone measurement in non-invasively collected hair samples an attractive option. We determined cortisol, cortisone, corticosterone, testosterone and progesterone in Iberian lynx hair using enzyme immunoassay (EIA). Cross-validation was performed with high-performance liquid chromatography (HPLC) and high-performance liquid chromatography coupled to tandem mass spectrometry (HPLC-MS/MS). Finally, we statistically evaluated the variations of sex steroids and glucocorticoids according to age, sex, origin, behavior and management. All steroids except corticosterone were detectable in Iberian lynx hair. Hair progesterone measured by EIA was overestimated by cross-reaction with 5α-dihydroprogesterone, a biologically active gestagene, and was highly correlated with HPLC-MS/MS results. Progesterone was higher in adult females compared to all other age-sex groups. Cortisol measured by EIA was overestimated due to antibody cross-reactivity with cortisone and was correlated to the sum of HPLC-MS/MS measurements for cortisol and cortisone. Cortisol was higher in females than in males measured by HPLC-MS/MS, but the EIA results were confounded by the lack of specificity. When using cortisol-cortisone and cortisol-dihydroepiandrosterone ratios, differences were noted between wild-caught and captive-bred lynxes. Additionally, longitudinal EIA measurements of an Iberian lynx after a wildfire showed an inversion of the cortisol-cortisone ratio that later subsided. These results validate the use of hair progesterone measurement for Iberian lynx reproductive monitoring and add to the growing evidence supporting the need for a more comprehensive approach to hair steroid measurement that accounts for local interconversion and co-regulation mechanisms.
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Affiliation(s)
- Alexandre Azevedo
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
- Instituto de Ciências Biomédicas Abel Salazar, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Jella Wauters
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
| | - Clemens Kirschbaum
- Faculty of Psychology, Department of Biopsychology, Technical University of Dresden, Helmholtzstraße 10, D-01069 Dresden, Germany
| | - Rodrigo Serra
- National Breeding Breeding Center for Iberian Lynxes, 8375-082 Messines, Portugal
| | - António Rivas
- El Acebuche Iberian Lynx Captive Breeding Centre-OAPN, Doñana National Park, Matalascañas, 21760 Huelva, Spain
| | - Katarina Jewgenow
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
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Forné C, Subirana I, Blanch J, Ferrieres J, Azevedo A, Meisinger C, Farmakis D, Tavazzi L, Davoli M, Ramos R, Brosa M, Marrugat J, Dégano IR. A cost-utility analysis of increasing percutaneous coronary intervention use in elderly patients with acute coronary syndromes in six European countries. Eur J Prev Cardiol 2020; 28:408-417. [PMID: 33966078 DOI: 10.1177/2047487320942644] [Citation(s) in RCA: 6] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/25/2020] [Indexed: 01/08/2023]
Abstract
AIMS Percutaneous coronary intervention reduces mortality in acute coronary syndrome patients but the cost-utility of increasing its use in elderly acute coronary syndrome patients is unknown. METHODS We assessed the efficiency of increased percutaneous coronary intervention use compared to current practice in patients aged ≥75 years admitted for acute coronary syndrome in France, Germany, Greece, Italy, Portugal and Spain with a semi-Markov state transition model. In-hospital mortality reduction estimates by percutaneous coronary intervention use and costs were derived from the EUROpean Treatment & Reduction of Acute Coronary Syndromes cost analysis EU project (n = 28,600). Risk of recurrence and out-of-hospital all-cause mortality were obtained from the Information System for the Development of Research in Primary Care (SIDIAP) database from North-Eastern Spain (n = 55,564). In-hospital mortality was modelled using stratified propensity score analysis. The 8-year acute coronary syndrome recurrence risk and out-of-hospital mortality were estimated with a multistate survival model. The scenarios analysed were to increase percutaneous coronary intervention use among patients with the highest, moderate and lowest probability of receiving percutaneous coronary intervention based on the propensity score analysis. RESULTS France, Greece and Portugal showed similar total costs/1000 individuals (7.29-11.05 m €); while in Germany, Italy and Spain, costs were higher (13.53-22.57 m €). Incremental cost-utility ratios of providing percutaneous coronary intervention to all patients ranged from 2262.8 €/quality adjusted life year gained for German males to 6324.3 €/quality adjusted life year gained for Italian females. Increasing percutaneous coronary intervention use was cost-effective at a willingness-to-pay threshold of 10,000 €/quality adjusted life year gained for all scenarios in the six countries, in males and females. CONCLUSION Compared to current clinical practice, broadening percutaneous coronary intervention use in elderly acute coronary syndrome patients would be cost-effective across different healthcare systems in Europe, regardless of the selected strategy.
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Affiliation(s)
- C Forné
- Department of Basic Medical Sciences, University of Lleida, Spain
| | - I Subirana
- REGICOR Study Group, IMIM (Hospital del Mar Medical Research Institute), Spain.,CIBER Epidemiology and Public Health, Instituto de Salud Carlos III (ISCIII), Spain
| | - J Blanch
- Vascular Health Research Group (ISV-Girona), Jordi Gol Institute for Primary Care Research (IDIAPJGol), Spain
| | - J Ferrieres
- Department of Cardiology, Toulouse University School of Medicine, France
| | - A Azevedo
- Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Portugal
| | - C Meisinger
- MONICA/KORA Myocardial Infarction Registry, University Hospital of Augsburg, Germany.,Helmholtz Zentrum München, German Research Center for Environmental Health, Germany
| | - D Farmakis
- University of Cyprus Medical School, Cyprus.,Second Department of Cardiology, University of Athens Medical School, Greece
| | - L Tavazzi
- Maria Cecilia Hospital, GVM Care and Research, Italy
| | - M Davoli
- Department of Epidemiology, Lazio Regional Health Service, Italy
| | - R Ramos
- Vascular Health Research Group (ISV-Girona), Jordi Gol Institute for Primary Care Research (IDIAPJGol), Spain.,Catalan Institute of Health, Spain.,Department of Medical Sciences, University of Girona, Spain.,Girona Biomedical Research Institute (IdIBGi), Spain
| | - M Brosa
- Oblikue Consulting SL, Spain
| | - J Marrugat
- REGICOR Study Group, IMIM (Hospital del Mar Medical Research Institute), Spain.,Centro de Investigación Biomédica en Red (CIBER) of Cardiovascular Diseases, ISCIII, Spain
| | - I R Dégano
- REGICOR Study Group, IMIM (Hospital del Mar Medical Research Institute), Spain.,Centro de Investigación Biomédica en Red (CIBER) of Cardiovascular Diseases, ISCIII, Spain.,Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Spain
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Oliveira J, Nunes R, Da Silva G, Nogueira I, Azevedo A, Baraliakos X, Rocha A. AB0968 DIAGNOSIS OF INFLAMMATORY BACK PAIN (IBP) IN A LOW-INCOME POPULATION USING ASAS IBP DEFINITION. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Inflammatory back pain (IBP) is an important entry criterion for identifying patients with axial spondyloarthritis. Due to the very frequent prevalence of chronic non-inflammatory back pain (CBP), IBP is difficult to differentiate and recognize in many clinical practices. CBP is a frequent diagnosis in populations with low socioeconomic status.Objectives:To investigate whether IBP ASAS definition help discriminate from CBP in a low-income population.Methods:A total of 202 consecutive individuals were directly interviewed in Fortaleza/Brazil, for the prevalence of IBP (ASAS definition), monthly family income (US$), school education [>/≤ 8 school-years(SY)], and smoking habit (present/absent). People from all social levels were included.Results:Mean age was 38.9±12.9 years, 100 (49.5%) were male and 36 (17.8%) were smokers; 135 (66.8%) declared less than 730US$ family earnings per month and 71 (35.1%) had less than 8 SY. Although 122 (60.3%) declared lumbar pain, in comparison, 29 (14.3%), 22 (10.9%) and 59 (29.2%) fulfilled ASAS, Berlin, and Calin’s IBP criteria, respectively. There were 39 (58.02%) vs. 83 (61.5%) with vs. without CBP and 9 (13.4%) vs. 20 (14.8%) fulfilling vs. not fulfilling the ASAS IBP definition among those with more or less than 730US$ earnings (P>0.05), respectively.Conclusion:This is the first report on the prevalence of IBP in a very low-income population. Over one-third had less than 8SY, revealing very low literacy. Smoking prevalence was also low if compared to 28% smoking prevalence WHO estimates across Europe*. These IBP prevalence data are similar to those reported in wealthier populations, living in higher latitude. Data suggest that ASAS IBP definition may be used to discriminate patients with IBP from those with CBP, regardless of income and literacy.References:This is the first report on the prevalence of IBP in a very low-income population. Over one-third had less than 8SY, revealing very low literacy. Smoking prevalence (17.8%) was also low if compared to 28% smoking prevalence WHO estimates across Europe*. These IBP prevalence data are similar to those reported in wealthier populations, living in higher latitude. Data suggest that ASAS IBP definition may be used to discriminate patients with IBP from those with CBP, regardless of income and literacy.Disclosure of Interests:Jobson Oliveira: None declared, Rodolfo Nunes: None declared, Guilherme da Silva: None declared, Igor Nogueira: None declared, Artur Azevedo: None declared, Xenofon Baraliakos Grant/research support from: Grant/research support from: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Consultant of: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Speakers bureau: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Airton Rocha Speakers bureau: Not related to the present work
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Fernandes-Platzgummer A, Rosa S, Silva R, Cunha R, Fuzeta M, Calado C, Carvalho C, Cabral J, Azevedo A, da Silva C. Design and operation of a fully controlled platform for the production and purification of well-defined mesenchymal stromal cell (MSC)-derived extracellular vesicles. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.058] [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: 10/24/2022]
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Jewgenow K, Azevedo A, Albrecht M, Kirschbaum C, Dehnhard M. Hair cortisol analyses in different mammal species: choosing the wrong assay may lead to erroneous results. Conserv Physiol 2020; 8:coaa009. [PMID: 32153782 PMCID: PMC7055589 DOI: 10.1093/conphys/coaa009] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/05/2019] [Accepted: 01/22/2020] [Indexed: 05/25/2023]
Abstract
Wild animals are faced with a broad range of environmental stressors and research is needed to better understand their effect on populations. Hormone analysis based on enzyme immunoassays (EIAs) can provide valuable information on adrenocortical activity (stress), and assessment of cortisol in hair may allow the quantification of cortisol production. To validate hair hormone analysis, we compared two EIAs based on antibodies against cortisol-3-CMO-BSA and cortisol-21-HS-BSA for hair glucocorticoid (hGC) measurements in Egyptian mongoose, Iberian lynx, Alpine marmot, Asiatic black bear, spotted hyena and cheetah, with results obtained by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) measurements. Both EIAs were also characterized by HPLC immunograms. Our results revealed that the cortisol-21-HS EIA measured 2.3- to 12-fold higher hGC concentrations than the cortisol-3-CMO assay. In dependence of the species, high-performance liquid chromatography (HPLC) immunograms showed that up to 70% of immunoreactivities determined by the cortisol-21-HS constituted of unknown unpolar compounds leading to an overestimation of hGC. The cortisol-3-CMO EIA expressed a better specificity, with 32.1-67.4% of immunoreactivity represented by cortisol and cortisone. The LC-MS/MS analyses (gold standard) revealed that the cortisol-3-CMO EIA also resulted in an (up to 3-fold) overestimation of hGC, but EIA results were correlated with LC-MS/MS in the mongoose, the lynx, the spotted hyena and the marmot. No correlation was obtained for Asiatic black bears. As a result of our study, we strongly recommend to test any cortisol EIA for its specificity towards extracted hair components. In all analyzed species, except the Asiatic black bear, cortisone and cortisol were simultaneously present in hair extracts; consequently, an appropriate EIA should cross-react to these two glucocorticoid hormones and express negligible affinity towards substances with less polarity than corticosterone. Choosing the wrong EIA for hGC analyses may lead to overestimations of hGC or-in the worst case-to results that do not mirror real adrenocortical activity.
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Affiliation(s)
- Katarina Jewgenow
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
| | - Alexandre Azevedo
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
- Instituto de Ciências Biomédicas Abel Salazar, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Mareen Albrecht
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
| | - Clemens Kirschbaum
- Faculty of Psychology, Department of Biopsychology, Technical University of Dresden, Helmholtzstraße 10, D-01069 Dresden, Germany Germany
| | - Martin Dehnhard
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str.17, D-10315 Berlin, Germany
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Durante CA, Moura Reis BM, Azevedo A, Crespo EA, Lailson-Brito J. Trace elements in trophic webs from South Atlantic: The use of cetaceans as sentinels. Mar Pollut Bull 2020; 150:110674. [PMID: 31726239 DOI: 10.1016/j.marpolbul.2019.110674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 10/11/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
The odontocetes are at the top of the trophic chains, and because they accumulate numerous compounds throughout life, they are considered as bioindicators of ecosystem contamination. This study aimed to analyze the concentrations of trace elements of the short-beak common dolphin (Delphinus delphis) and Fraser's dolphin (Lagenodelphis hosei) from the Southwestern Atlantic Ocean. Regardless of the tissue and the species, the average concentration of silver was the lowest. The highest concentration in the kidney was cadmium, while in the liver it varied between selenium and total mercury according to the species. The bioconcentration process was present in relation with the age and standard length in common dolphins. Additionally, Se-HgT molar ratios differed among species. This study provides new information on the current state of pollution by trace elements in common and Fraser's dolphins in the Southwest Atlantic, and it serves as a complement to the work in tropical waters.
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Affiliation(s)
- Cristian Alberto Durante
- Centro para el Estudio de Sistemas Marinos (CESIMAR) - Centro Nacional Patagónico - CONICET, Bv. Brown 2915, U9120ACD, Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Bv. Brown 2915, U9120ACD, Puerto Madryn, Chubut, Argentina.
| | - Barbara Manhaes Moura Reis
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, 20530-013, Rio de Janeiro, RJ, Brazil.
| | - Alexandre Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, 20530-013, Rio de Janeiro, RJ, Brazil.
| | - Enrique Alberto Crespo
- Centro para el Estudio de Sistemas Marinos (CESIMAR) - Centro Nacional Patagónico - CONICET, Bv. Brown 2915, U9120ACD, Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Bv. Brown 2915, U9120ACD, Puerto Madryn, Chubut, Argentina
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, 20530-013, Rio de Janeiro, RJ, Brazil
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Azevedo A, Bailey L, Bandeira V, Dehnhard M, Fonseca C, de Sousa L, Jewgenow K. Correction: Age, sex and storage time influence hair cortisol levels in a wild mammal population. PLoS One 2019; 14:e0222963. [PMID: 31532785 PMCID: PMC6750584 DOI: 10.1371/journal.pone.0222963] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pone.0221124.].
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Brito C, Azevedo A, Esteves S, Martins C, Mafra M, Roque L, Pojo M. P03.13 Evaluation of PIK3CA mutational status in glioma molecular subgroups. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.094] [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: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Gliomas are the most common and lethal malignant tumors of central nervous system. In 2016, World Health Organization (WHO) classification included IDH mutations and 1p/19q codeletion as diagnostic criteria to define glioma entities. However, new biomarkers for diagnosis, prognosis and response to therapy are needed. In this context, PIK3CA mutations have been described as constitutive mutations, which highlights their relevance in gliomas. Here we clarified the clinical relevance of PIK3CA mutations according to the 2016 WHO classification, the potential impact on diagnosis, prognosis, response to therapy, as well as their correlation with EGFR amplification and PTEN deletion.
MATERIAL AND METHODS
A cohort of 444 adult diffuse glioma samples from Instituto Português de Oncologia Lisboa Francisco Gentil (IPOLFG) was classified according to the 2016 WHO Classification. The mutational status of exon 9 and 20 of PIK3CA was evaluated in molecular subgroups of gliomas by Sanger sequencing. PTEN deletion and EGFR amplification were identified by Fluorescent in situ hybridization (FISH).
RESULTS
PIK3CA mutations showed a higher frequency in the subgroup of gliomas with IDH mutations and 1p/19q codeletion - oligodendrogliomas (10%). In Glioblastoma (GBM) IDH-mutant and IDH-wildtype these oncogenic mutations were observed in 9% and 3% of cases, respectively. Similar results were obtained using The Cancer Genome Atlas (TCGA) data, which was 8% and 2%, respectively. H1047R and E542K were the most frequent mutations identified in the glioma molecular subgroups. Importantly, we found 3 unreported pathogenic variants in exon 20 of PIK3CA (c.3112T>C, c.2988T>C, c.3040C>T) and one polymorphic variant (c.3210A>G). In addition, PIK3CA mutations, PTEN deletion and EGFR amplification were not mutually exclusive alterations in glioma molecular subgroups. For the first time in gliomas, it was identified the rs45455192 polymorphism at a frequency of 16% in astrocytomas IDH-mutant, 24% in oligodendrogliomas and 18% in both molecular subgroups of GBM, although this polymorphism did not have prognostic value. The analysis of PIK3CA mutations in glioma recurrences showed that these mutations are maintained during glioma progression.
CONCLUSION
In two independent cohorts (IPOLFG and TCGA), it was obtained similar frequencies of PIK3CA mutations in GBM molecular subgroups. In addition, these mutations are more relevant in less aggressive gliomas (IDH-mutated and 1p/19q codeleted). These alterations seem to be important in tumor maintenance and progression, which makes this gene a potential therapeutic target. In the future, we will investigate the effect of the in vitro pharmacological inhibition of PIK3CA in GBM mutant cell lines.
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Affiliation(s)
- C Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - A Azevedo
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil, E.P.E., Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
- Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal, Portugal
| | - S Esteves
- Unidade de Investigação Clínica (UIC), Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal, Portugal
| | - C Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Mafra
- Serviço de Anatomia Patológica do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E, Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
| | - L Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
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Azevedo A, Oliveira H, Rubio J. Bulk nanobubbles in the mineral and environmental areas: Updating research and applications. Adv Colloid Interface Sci 2019; 271:101992. [PMID: 31351416 DOI: 10.1016/j.cis.2019.101992] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 07/09/2019] [Accepted: 07/15/2019] [Indexed: 02/08/2023]
Abstract
In the last decade, the research with bulk nanobubbles (ultrafine bubbles with a diameter <1 μm, according to ISO 20480-1:2017) has been rapidly increasing in the academic and industrial environments. Nowadays, there are many applications reported in the literature, with several patents, procedures, and techniques on nanobubbles generation and an evergrowing research and many applications. Yet, most of those publications reporting bulk nanobubbles generation devices, do not bring information on measurements of size distribution or bubbles concentration (if nanobubbles). Further, there is a problem of scale and many of these products are small bench discontinuous rigs difficult to scale up, which might serve small scale purposes, but are not able for treating high flow-rate wastewaters or minerals pulps at industrial scale. These nanometric bubbles present interesting and peculiar properties such as high surface area per volume unit, high stability and longevity, surface charge in water and the ability to aggregate hydrophobic particles. These findings demonstrate their high potential for applications in many technological areas, which occur not only as isolated bubbles but also jointly with micro (~ 1-100 μm diameter) and/or macrobubbles (~100 μm - 2 mm diameter). This paper reviews the evolution of basic research on nanobubbles, the challenges concerning generation and stability and their applications in the mineral (flotation) and environmental areas (treatment of water and wastewaters or remediation of contaminated environments). Herein, because the importance in engineering, as a whole, most of the studies are based on the nanobubbles generated by depressurisation/hydrodynamic cavitation of the air-saturated water in flow constrictors (venturi, needle valves). In the mineral area, they appear to be responsible for increasing the recovery and flotation kinetics of fine (<74 μm) and ultrafine (<13 μm) particles at lower frother and collector dosages. In the environmental area, nanobubbles have been reported to enhance the removal of a variety of pollutants (emulsified oil, colloidal solids, organic/inorganic precipitates, ions) by flotation associated with bigger bubbles. More, the application of isolated nanobubbles on the removal of residual pollutants, such as amine and oil (both as flocs) were reported. Also, the use of ozone and oxygen nanobubbles has been studied for the remediation/decontamination of soil and aquatic ecosystems and for the oxidation of emerging pollutants in water and wastewater treatment. The future of nanobubbles in flotation separation research is highly promising; operating costs of the different forms of nanobubbles generation and bench studies should be validated through pilot and real scale with the continuous injection of these bubbles.
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Azevedo A, Bailey L, Bandeira V, Dehnhard M, Fonseca C, de Sousa L, Jewgenow K. Age, sex and storage time influence hair cortisol levels in a wild mammal population. PLoS One 2019; 14:e0221124. [PMID: 31398221 PMCID: PMC6688795 DOI: 10.1371/journal.pone.0221124] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/30/2019] [Indexed: 11/18/2022] Open
Abstract
The measurement of hair cortisol is increasingly used to understand the effect of natural and anthropogenic stressors on wild animals, but it is potentially confounded by individual, seasonal and sex-dependant variations in baseline cortisol secretion. This study validated an enzyme-linked immunoassay for hair cortisol measurement and characterized its baseline variation in a wild population of Egyptian mongoose. The analysis encompassed individuals of both sexes and all ages, across a range of geographic, environmental and seasonal conditions that the species experiences in Portugal allowing us to account for spatial, temporal and biological factors that contribute to hair cortisol variation. Our results showed that age, sex and storage time had an effect on hair cortisol, but season did not. Hair cortisol was higher in early stage juveniles compared to other age cohorts, in males when compared to females, and decreased with longer storage time. By identifying the factors that influence baseline hair cortisol in this wild population, we establish the basis for its application as an indicator of the effect of natural and anthropogenic stressors.
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Affiliation(s)
- Alexandre Azevedo
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Instituto de Ciências Biomédicas Abel Salazar, Porto, Portugal
- * E-mail:
| | - Liam Bailey
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Victor Bandeira
- Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal
| | - Martin Dehnhard
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Carlos Fonseca
- Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal
| | | | - Katarina Jewgenow
- Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
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Abstract
Metformin has been the first-line drug for the treatment of type II diabetes mellitus for decades, being presently the most widely prescribed antihyperglycemic drug. Retrospective studies associate the use of metformin with a reduction in cancer incidence and cancer-related death. However, despite extensive research about the molecular effects of metformin in cancer cells, its mode of action remains controversial. The major molecular targets of metformin include complex I of the mitochondrial electron transport chain, adenosine monophosphate (AMP)-activated protein kinase (AMPK), and mechanistic target of rapamycin complex 1 (mTORC1), but AMPK-independent effects of metformin have also been described. Breast cancer is one of the leading causes of cancer-related morbidity and mortality among women worldwide. Several studies have reinforced a link between breast cancer risk and diabetes. Moreover, metformin significantly reduces breast cancer risk, compared to patients who are not using metformin and is independent of diabetes status. In this review, we summarize the current molecular evidence to elucidate metformin's mode of action against breast cancer cells.
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Affiliation(s)
- J Faria
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal
| | - G Negalha
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal
| | - A Azevedo
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal
| | - F Martel
- Unit of Biochemistry, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal.
- I3S, Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal.
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Azevedo A, Faria J. Implant rehabilitation after microvascularized fibula flap: guided implant surgery. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.162] [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: 10/26/2022]
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Abstract
Bruxismo durante o sono (BS) é uma parassonia caracterizada por movimentos involuntários e estereotipados com ranger dos dentes durante o sono. A prevalência do BS é igual nos dois sexos, variando de 3% a 20% na população geral, sendo mais comum nos jovens. O BS secundário é causado por transtornos neurológicos ou pode estar associado a transtornos primários do sono e antidepressivos inibidores seletivos da recaptação da serotonina. Já o BS primário apresenta fatores de predisposição genética ou psicológica, má oclusão dentária, disfunção leve dos gânglios da base e combinações desses fatores. Os principais sinais e sintomas do BS incluem o ruído característico de ranger dos dentes, desgaste dentário, dor local, hipertrofia dos músculos masseteres e temporais, cefaléias, disfunção da articulação temporomandibular, sono de má qualidade e sonolência diurna. O diagnóstico clínico de BS é feito por meio da história do paciente, do cônjuge e do exame odontológico. A polissonografia documenta a presença de episódios de ranger dos dentes, permitindo identificar alterações da arquitetura do sono, presença de microdespertares, abalos mioclônicos de membros inferiores, roncos e distúrbios respiratórios sonodependentes. O tratamento deve ser direcionado para os fatores etiológicos com base no BS secundário. Não existe tratamento-padrão para o BS primário, devendo este ser individualizado ao paciente. O tratamento odontológico do BS primário e secundário com placas de repouso tem como objetivo prevenir danos das estruturas orofaciais e aliviar dor craniofacial. O tratamento comportamental inclui técnicas de relaxamento, abstinência de cafeína e tabaco. O tratamento farmacológico do BS primário e secundário emprega drogas agonistas dopaminérgicas, benzodiazepínicos ansiolíticos, buspirona, hipnóticos não-benzodiazepínicos, como o zolpidem, relaxantes musculares, certos antidepressivos, como mirtazapina, nefazodona, trazodona, bupopriona e drogas antiepilépticas, como a gabapentina. Aplicações locais de toxina botulínica nos músculos masseteres e temporais podem ser utilizadas em casos de bruxismo intenso não-responsivo à terapêutica convencional.
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Oliveira AB, de Melo ACC, da Costa RB, Costa NP, Azevedo A, Chesman C. Perturbative measurement of magnetoresistance. Rev Sci Instrum 2018; 89:125115. [PMID: 30599562 DOI: 10.1063/1.5047661] [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] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 12/02/2018] [Indexed: 06/09/2023]
Abstract
In this paper, we report the development of a novel technique in which the magnetoresistance of nanostructures is perturbatively measured by transversally modulating the DC magnetic field. It measures the electrical transport counterpart of the transverse magnetic AC-susceptibility. The technique was developed in a conventional four-probe configuration in which a small DC current flows through the sample and a small transverse AC-field perturbates the equilibrium position of the sample magnetization. Lock-in detection, in-phase with the AC-perturbation, is used to measure the voltage signal between the two inner electrodes of the four-probe station. We successfully demonstrated that this signal is proportional to the product of the first derivative of sample resistance with respect to the equilibrium position of the magnetization times the second derivative of the energy with respect to the equilibrium position of the magnetization. These dependences add new features to the technique investigated here that were not captured by the investigations previously reported on the same subject. To show the effective use of the technique, we discuss its application in measuring magnetic properties of thin magnetic films in the non-saturated regime.
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Affiliation(s)
- A B Oliveira
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande Do Norte, BR-59072-970 Natal, RN, Brazil
| | - A C C de Melo
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande Do Norte, BR-59072-970 Natal, RN, Brazil
| | - R B da Costa
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande Do Norte, BR-59072-970 Natal, RN, Brazil
| | - N P Costa
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande Do Norte, BR-59072-970 Natal, RN, Brazil
| | - A Azevedo
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - C Chesman
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande Do Norte, BR-59072-970 Natal, RN, Brazil
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Goncalves Teixeira PM, Ladeiras Lopes R, Bettencourt P, Azevedo A, Leite-Moreira A, Fontes-Carvalho R. P1555Metabolic syndrome severity score is a predictor of worse diastolic function independently of each individual metabolic syndrome component: a community-based cohort study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - R Ladeiras Lopes
- Hospital Center of Vila Nova de Gaia/Espinho, Cardiology, Vila Nova de Gaia, Portugal
| | - P Bettencourt
- Faculty of Medicine University of Porto, Porto, Portugal
| | - A Azevedo
- Faculty of Medicine University of Porto, Porto, Portugal
| | - A Leite-Moreira
- Faculty of Medicine University of Porto, Physiology and Surgery, Porto, Portugal
| | - R Fontes-Carvalho
- Hospital Center of Vila Nova de Gaia/Espinho, Cardiology, Vila Nova de Gaia, Portugal
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Sacristán C, Catão-Dias JL, Ewbank AC, Ferreira-Machado E, Neves E, Santos-Neto EB, Azevedo A, Laison-Brito J, De Castilho PV, Daura-Jorge FG, Simões-Lopes PC, Carballo M, García-Párraga D, Sánchez-Vizcaíno JM, Esperón F. Novel and highly sensitive SYBR® Green real-time pcr for poxvirus detection in odontocete cetaceans. J Virol Methods 2018; 259:45-49. [PMID: 29890240 DOI: 10.1016/j.jviromet.2018.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 01/22/2023]
Abstract
Poxviruses are emerging pathogens in cetaceans, temporarily named 'Cetaceanpoxvirus' (CePV, family Poxviridae), classified into two main lineages: CePV-1 in odontocetes and CePV-2 in mysticetes. Only a few studies performed the molecular detection of CePVs, based on DNA-polymerase gene and/or DNA-topoisomerase I gene amplification. Herein we describe a new real-time PCR assay based on SYBR® Green and a new primer set to detect a 150 bp fragment of CePV DNA-polymerase gene, also effective for conventional PCR detection. The novel real-time PCR was able to detect 5 up to 5 × 106 copies per reaction of a cloned positive control. Both novel PCR methods were 1000 to 100,000-fold more sensitive than those previously described in the literature. Samples of characteristic poxvirus skin lesions ('tattoo') from one Risso's dolphin (Grampus griseus), two striped dolphins (Stenella coeruleoalba) and two Guiana dolphins (Sotalia guianensis) were all positive to both our novel real time- and conventional PCR methods, even though three of these animals (a Risso's dolphin, a striped dolphin, and a Guiana dolphin) were previously negative to the conventional PCRs previously available. To our knowledge, this is the first real-time PCR detection method for Cetaceanpoxvirus, a much more sensitive tool for the detection of CePV-1 infections.
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Affiliation(s)
- Carlos Sacristán
- Departamento de Patologia, Laboratório de Patologia Comparada de Animais Selvagens - LAPCOM, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva 87, São Paulo, 05508-270, Brazil; Centro de Investigación en Sanidad Animal (INIA-CISA), Ctra Algete el Casar s/n, Valdeolmos, Madrid, 28130, Spain.
| | - José Luiz Catão-Dias
- Departamento de Patologia, Laboratório de Patologia Comparada de Animais Selvagens - LAPCOM, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva 87, São Paulo, 05508-270, Brazil.
| | - Ana Carolina Ewbank
- Departamento de Patologia, Laboratório de Patologia Comparada de Animais Selvagens - LAPCOM, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva 87, São Paulo, 05508-270, Brazil.
| | - Eduardo Ferreira-Machado
- Departamento de Patologia, Laboratório de Patologia Comparada de Animais Selvagens - LAPCOM, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva 87, São Paulo, 05508-270, Brazil.
| | - Elena Neves
- Centro de Investigación en Sanidad Animal (INIA-CISA), Ctra Algete el Casar s/n, Valdeolmos, Madrid, 28130, Spain.
| | - Elitieri Batista Santos-Neto
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa Izabel M. G. do N. Gurgel" (MAQUA), Faculdade De Oceanografia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Alexandre Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa Izabel M. G. do N. Gurgel" (MAQUA), Faculdade De Oceanografia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - José Laison-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa Izabel M. G. do N. Gurgel" (MAQUA), Faculdade De Oceanografia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Pedro Volkmer De Castilho
- Departamento de Engenharia de Pesca, Universidade do Estado de Santa Catarina, Bairro Progresso 88, Laguna, 790-000, Brazil.
| | - Fábio Gonçalves Daura-Jorge
- Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Campus Universitário, s/n. Trindade 88040-970, Florianópolis, Brazil.
| | - Paulo César Simões-Lopes
- Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Campus Universitário, s/n. Trindade 88040-970, Florianópolis, Brazil.
| | - Matilde Carballo
- Centro de Investigación en Sanidad Animal (INIA-CISA), Ctra Algete el Casar s/n, Valdeolmos, Madrid, 28130, Spain.
| | - Daniel García-Párraga
- Veterinary Services, Fundación Oceanogràfic, Ciudad de Las Artes y las Ciencias, C/ Eduardo Primo Yúfera 1B 46013, Valencia, Spain.
| | - José Manuel Sánchez-Vizcaíno
- VISAVET Center and Animal Health Department, Veterinary School, Complutense University of Madrid, Madrid, 28040, Spain.
| | - Fernando Esperón
- Centro de Investigación en Sanidad Animal (INIA-CISA), Ctra Algete el Casar s/n, Valdeolmos, Madrid, 28130, Spain.
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Bandeira V, Virgós E, Azevedo A, Carvalho J, Cunha MV, Fonseca C. Sex and season explain spleen weight variation in the Egyptian mongoose. Curr Zool 2018; 65:11-20. [PMID: 30697234 PMCID: PMC6347055 DOI: 10.1093/cz/zoy031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 04/06/2018] [Indexed: 11/29/2022] Open
Abstract
The Egyptian mongoose (Herpestes ichneumon Linnaeus, 1758) is a medium-sized carnivore that experienced remarkable geographic expansion over the last 3 decades in the Iberian Peninsula. In this study, we investigated the association of species-related and abiotic factors with spleen weight (as a proxy for immunocompetence) in the species. We assessed the relationship of body condition, sex, age, season, and environmental conditions with spleen weight established for 508 hunted specimens. Our results indicate that the effects of sex and season outweigh those of all other variables, including body condition. Spleen weight is higher in males than in females, and heavier spleens are more likely to be found in spring, coinciding with the highest period of investment in reproduction due to mating, gestation, birth, and lactation. Coupled with the absence of an effect of body condition, our findings suggest that spleen weight variation in this species is mostly influenced by life-history traits linked to reproduction, rather than overall energy availability, winter immunoenhancement, or energy partitioning effects, and prompt further research focusing on this topic.
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Affiliation(s)
- Victor Bandeira
- Department of Biology & Centro de Estudos do Ambiente e do Mar (CESAM), University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Emilio Virgós
- Departamento de Biología, Geología, Física y Química Inorgánica, Área Biodiversidad y Conservación, Escuela Superior de Ciencias Experimentales y Tecnología (ESCET), Universidad Rey Juan Carlos, c/Tulipán, s/n, Móstoles, Madrid, Spain
| | - Alexandre Azevedo
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, Berlin, Germany.,Instituto de Ciências Biomédicas Abel Salazar, R. Jorge de Viterbo Ferreira 228, Porto, Portugal
| | - João Carvalho
- Department of Biology & Centro de Estudos do Ambiente e do Mar (CESAM), University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal.,Wildlife Ecology & Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Mónica V Cunha
- Instituto Nacional de Investigação Agrária e Veterinária (INIAV), IP-National Institute for Agrarian and Veterinary Research, Rua dos Lagidos, Lugar da Madalena, Vairão, Portugal.,cE3c-Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal.,BioISI-Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Carlos Fonseca
- Department of Biology & Centro de Estudos do Ambiente e do Mar (CESAM), University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
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Silva J, Ramos M, Azevedo A, Salgado D, Costa I, Marques J. Primary central nervous system germ cell tumours: A single institution retrospective study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx366.034] [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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Almeida J, Fontes Carvalho R, Sampaio F, Ribeiro J, Bettencourt P, Leite-Moreira A, Azevedo A. P575The impact of the new 2016 ASE/EACVI recommendations in the prevalence of diastolic dysfunction: an analysis from the general population. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p575] [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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Huo Yung Kai S, Degano I, Malmivaara A, Kirchberger I, Farmakis D, Torre M, Azevedo A, Fusco D, Davoli M, Marrugat J, Ferrieres J. P6250Cardiovascular risk factors among 94,473 acute coronary syndrome patients in Europe. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6250] [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: 11/15/2022] Open
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Azevedo A, Etchepare R, Rubio J. Raw water clarification by flotation with microbubbles and nanobubbles generated with a multiphase pump. Water Sci Technol 2017; 75:2342-2349. [PMID: 28541942 DOI: 10.2166/wst.2017.113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s-1 and an NB concentration of 1 × 108 NBs mL-1 (measuring 220 nm). Then, a study compared flotation with bubbles formed with the multiphase pump (F-MP) to lamellar settling at the clarification stage of a water treatment plant (WTP), in Brazil. The F-MP showed a higher separation efficiency at high hydraulic loads (9-15 m h-1), even without the use of a polymer, reaching 2 NTU (10-25 NTU raw water feed), which was much lower than the technical goal of the WTP (5 NTU). The results and the technical aspects are discussed, and it is concluded that the employment of MBs and NBs with pumps widens new research lines and applications in modern flotation.
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Affiliation(s)
- A Azevedo
- Minerals Engineering Department-PPGE3M, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Campus do Vale, Prédio 43819 - Setor 6, Porto Alegre-RS 91501-970, Brazil E-mail:
| | - R Etchepare
- Minerals Engineering Department-PPGE3M, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Campus do Vale, Prédio 43819 - Setor 6, Porto Alegre-RS 91501-970, Brazil E-mail:
| | - J Rubio
- Minerals Engineering Department-PPGE3M, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Campus do Vale, Prédio 43819 - Setor 6, Porto Alegre-RS 91501-970, Brazil E-mail:
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Azevedo A, Torres T. Clinical Efficacy and Safety of Ixekizumab for Treatment of Psoriasis. Actas Dermo-Sifiliográficas (English Edition) 2017. [DOI: 10.1016/j.adengl.2016.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Azevedo A, Torres T. Clinical Efficacy and Safety of Ixekizumab for Treatment of Psoriasis. Actas Dermo-Sifiliográficas 2017; 108:305-314. [DOI: 10.1016/j.ad.2016.09.021] [Citation(s) in RCA: 9] [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] [Received: 07/03/2016] [Revised: 09/14/2016] [Accepted: 09/18/2016] [Indexed: 01/18/2023] Open
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Alonso MB, Maruya KA, Dodder NG, Lailson-Brito J, Azevedo A, Santos-Neto E, Torres JPM, Malm O, Hoh E. Nontargeted Screening of Halogenated Organic Compounds in Bottlenose Dolphins (Tursiops truncatus) from Rio de Janeiro, Brazil. Environ Sci Technol 2017; 51:1176-1185. [PMID: 28055195 PMCID: PMC6263163 DOI: 10.1021/acs.est.6b04186] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
To catalog the diversity and abundance of halogenated organic compounds (HOCs) accumulating in high trophic marine species from the southwestern Atlantic Ocean, tissue from bottlenose dolphins (Tursiops truncatus) stranded or incidentally captured along the coast of Rio de Janeiro, Brazil, were analyzed by a nontargeted approach based on GC×GC/TOF-MS. A total of 158 individual HOCs from 32 different structural classes were detected in the blubber of 4 adult male T. truncatus. Nearly 90% of the detected compounds are not routinely monitored in the environment. DDT-related and mirex/dechlorane-related compounds were the most abundant classes of anthropogenic origin. Methoxy-brominated diphenyl ethers (MeO-BDEs) and chlorinated methyl- and dimethyl bipyrroles (MBPs and DMBPs) were the most abundant natural products. Reported for the first time in southwestern Atlantic cetaceans and in contrast to North American marine mammals, chlorinated MBPs and DMBPs were more abundant than their brominated and/or mixed halogenated counterparts. HOC profiles in coastal T. truncatus from Brazil and California revealed a distinct difference, with a higher abundance of MeO-BDEs, mirex/dechloranes and chlorinated bipyrroles in the Brazilian dolphins. Thirty-six percent of the detected HOCs had an unknown structure. These results suggest broad geographical differences in the patterns of bioaccumulative chemicals found in the marine environment and indicate the need to develop more complete catalogs of HOCs from various marine environments.
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Affiliation(s)
- Mariana B. Alonso
- Graduate School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard, Suite 110, Costa Mesa, CA 92626, USA
- Laboratory of Aquatic Mammals and Bioindicators (UERJ), R. São Francisco Xavier, 524 - S.4018 - Bl. E, Rio de Janeiro, RJ, Brasil, 20550-013
- Laboratory of Radioisotopes - Biophysics Institute (UFRJ), Av. Carlos Chagas Filho, 373 CCS - Bl.G, Rio de Janeiro, RJ, Brasil, 21941-902
| | - Keith A. Maruya
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard, Suite 110, Costa Mesa, CA 92626, USA
| | - Nathan G. Dodder
- Graduate School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
- San Diego State University Research Foundation, 5250 Campanile Drive, San Diego, CA 92182, USA
| | - José Lailson-Brito
- Laboratory of Aquatic Mammals and Bioindicators (UERJ), R. São Francisco Xavier, 524 - S.4018 - Bl. E, Rio de Janeiro, RJ, Brasil, 20550-013
| | - Alexandre Azevedo
- Laboratory of Aquatic Mammals and Bioindicators (UERJ), R. São Francisco Xavier, 524 - S.4018 - Bl. E, Rio de Janeiro, RJ, Brasil, 20550-013
| | - Elitieri Santos-Neto
- Laboratory of Aquatic Mammals and Bioindicators (UERJ), R. São Francisco Xavier, 524 - S.4018 - Bl. E, Rio de Janeiro, RJ, Brasil, 20550-013
| | - Joao P. M. Torres
- Laboratory of Radioisotopes - Biophysics Institute (UFRJ), Av. Carlos Chagas Filho, 373 CCS - Bl.G, Rio de Janeiro, RJ, Brasil, 21941-902
| | - Olaf Malm
- Laboratory of Radioisotopes - Biophysics Institute (UFRJ), Av. Carlos Chagas Filho, 373 CCS - Bl.G, Rio de Janeiro, RJ, Brasil, 21941-902
| | - Eunha Hoh
- Graduate School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
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Osório F, Ferro L, Garrido L, Henriques A, Cruz J, Fangueiro R, Fougo JL, Azevedo A. Satisfaction with a therapeutic sleeve for arm lymphedema secondary to breast cancer treatment: Controlled crossover trial. Porto Biomed J 2017; 2:13-17. [PMID: 32258578 DOI: 10.1016/j.pbj.2016.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/28/2016] [Indexed: 11/15/2022] Open
Abstract
Highlights Secondary lymphedema is a late iatrogenic side effect of breast cancer treatment.Despite multimodal decongestive therapy in their daily life breast cancer survivors with lymphedema have few alternatives but to use a compressive sleeve.Concerned with the well-known low compliance to the daily use of traditional sleeves, we conducted a comparative study to evaluate the subjective assessment of an innovative class 1 compression sleeve.We concluded that the PRADEX® sleeve, not being worse in its compressive efficacy, is much better with regard to patient comfort. Abstract Secondary arm lymphedema is a feared late iatrogenic side effect of breast cancer survivors with a negative impact on patient's self-image and quality of life. Its reported incidence is extremely variable, from 6% to 80%, as well as the effectiveness of the multimodal decongestive lymphedema therapy.In their daily life breast cancer survivors with lymphedema have few alternatives but to use a compressive sleeve. Concerned with the well-known low compliance to the daily use of traditional sleeves, we conducted a comparative study in a subgroup of our patients with lymphedema secondary to breast cancer treatment for the subjective assessment of PRADEX®, an innovative class 1 compression sleeve. Secondarily, we aimed to assess the non-inferiority of PRADEX® regarding subjective and objective measures of the severity of lymphedema.We studied 46 women with grade 1 secondary arm lymphedema, who used their usual sleeve and PRADEX® daily for 2 weeks each, in a crossover design.The new therapeutic sleeve was classified as having a better design and a better usability and comfort (more comfortable, thinner, fresher, softer, more flexible, comfortable, resistant to dirt and easier to dress and to wear). Women's subjective opinion about the severity of lymphedema favored their usual sleeve in detriment of PRADEX®, but this subjective feeling was contradicted by objective measurements of different perimeters of the arm at the beginning and at the end of the study.We concluded that the PRADEX® sleeve, not being worse in its compressive therapeutic efficacy, is much better with regard to patient comfort.
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Affiliation(s)
- F Osório
- Breast Center, Centro Hospitalar São João, Porto, Portugal
| | - L Ferro
- Breast Center, Centro Hospitalar São João, Porto, Portugal
| | - L Garrido
- Breast Center, Centro Hospitalar São João, Porto, Portugal
| | - A Henriques
- EPIUnit - Institute of Public Health, University of Porto, Porto, Portugal
| | - J Cruz
- Fibrous Material Research Group, 2C2T, University of Minho, Braga, Portugal
| | - R Fangueiro
- Fibrous Material Research Group, 2C2T, University of Minho, Braga, Portugal
| | - J L Fougo
- Breast Center, Centro Hospitalar São João, Porto, Portugal
| | - A Azevedo
- EPIUnit - Institute of Public Health, University of Porto, Porto, Portugal
- Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal
- Clinical Research Unit, Hospital Epidemiology Center, Centro Hospitalar São João, Porto, Portugal
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Huo Yung Kai S, Roman Degano I, Malmivaara A, Kirchberger I, Farmakis D, Torre M, Azevedo A, Fusco D, Davoli M, Marrugat J, Ferrières J. Cardiovascular risk factors among 94 473 acute coronary syndrome patients in Europe. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30315-4] [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: 10/19/2022]
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De Chiara B, Ranjbar S, Szczesniak-Stanczyk D, Gabrielli L, Djikic D, Barbier P, Hristova K, Erne D, Zayat R, Crowe TM, Almeida J, Marketou M, Caspar T, Kouris N, Pontone G, Trifunovic D, Cusma Piccione M, Madeira M, Lovric D, Drakopoulou M, Fries B, Krivickiene A, Mateescu AD, Stella S, Casadei F, Peritore A, Spano F, Santambrogio G, Vicario M, Trolese I, Gallina C, Giannattasio C, Moreo A, Karvandi M, Badano LP, Brzozowski W, Blaszczyk R, Szyszko M, Zarczuk R, Janowski M, Wysokinski A, Stanczyk B, Sitges M, Castro P, Verdejo H, Ocaranza MP, Sepulveda P, Llevaneras S, Baraona F, Salinas M, Lavanderos S, Mujovic N, Dejanovic B, Peric V, Marinkovic M, Jankovic N, Orbovic B, Simic D, Guglielmo M, Salvini L, Savioli G, Dasheva A, Marinov R, Lasarov S, Mitev I, M P, Rhodes K, Bartlett M, Chong A, Wahi S, Derwall M, Ebeling A, Nix C, Marx G, Autschbach R, Hatam N, Sonecki P, Brewis MJ, Church AC, Johnson MK, Peacock AJ, Fontes-Carvalho R, Sampaio F, Ribeiro J, Bettencourt P, Leite-Moreira A, Azevedo A, Kontaraki J, Parthenakis P, Maragkoudakis S, Touloupaki M, Patrianakos A, Konstantinou J, Vernardos M, Logakis J, Vardas P, El Ghannudi S, Ohlmann P, Lawson A, Morel O, Ohana M, Roy C, Gangi A, Germain P, Kostakou P, Dagre A, Trifou E, Rodis I, Kostopoulos V, Olympios CD, Guaricci AI, Verdecchia M, Andreini D, Guglielmo M, Baggiano A, Beltrama V, Ferro G, Carita' P, Pepi M, Krljanac G, Savic L, Asanin M, Matovic D, Stepanovic J, Stankovic G, Mrdovic I, Terrizzi A, Trio O, Oteri A, D'amico G, Ioppolo A, Nucifora G, Zucco M, Sergi M, Nicotera A, Boretti I, Carerj S, Zito C, Teixeira R, Reis L, Dinis P, Fernandes A, Caetano F, Almeida I, Costa M, Goncalves L, Reskovic Luksic V, Baricevic Z, Dosen D, Pasalic M, Ostojic Z, Brestovac M, Bulum J, Separovic Hanzevacki J, Toutouzas K, Stathogiannis K, Michelongona A, Latsios G, Synetos A, Trantalis G, Kaitozis O, Brili S, Tousoulis D, Liu D, Hu K, Voelker W, Ertl G, Weidemann F, Herrmann S, Gumauskiene B, Drebickaite E, Ereminiene E, Vaskelyte JJ, Calin A, Rosca M, Beladan CC, Enache R, Calin C, Cosei I, Botezatu S, Simion M, Ginghina C, Popescu BA, Rosa I, Marini C, Ancona F, Latib A, Monitorano M, Colombo A, Margonato A, Agricola E. Poster Session 4The imaging examination and quality assessmentP957Economic impact analysis and quality performance of working with cardiovascular sonographers in high-volume echocardiography laboratoryP958Feasibility of temporal super resolution enhancement of echocardiographic images to diagnose cardiac DiseasesP959Remote medical diagnostician project - Achievements and limitation in tele-echocardiographyP960Right atrial remodeling and galectin-3 are associated with functional capacity in patients with pulmonary arterial hypertensionP961Interatrial electromechanical delay assessed by tissue doppler imaging can separate adults with prehypertension from healthy normotensive controlsP962Preliminary results of an extensive echocardiographic pacemaker optimization protocol for cardiac resynchronization therapyP963Left ventricular global and regional myocardial function in patients with double orifice mitral valve after radical correction on atrioventricular septal defectP964Improving quantitation of left ventricular ejection fraction in a tertiary echocardiography lab - marrying (or merging) guidelines and new technologyP965Echocardiographic evaluation of cardiac function and hemodynamics during LVAD-based resuscitation from cardiac arrest - a porcine studyP966Systolic excursion of the right ventricular outflow tract as a marker of right ventricular dysfunctionP967The impact of the new 2016 ASE/EACVI recommendations in the prevalence and grades of diastolic dysfunction: an analysis from the general populationP968Differential microRNA-21 and microRNA-133 gene expression levels in peripheral blood mononuclear cells from patients with heart failure with preserved ejection fractionP969CMR evaluation of cardiac thrombi and masses by T1 and T2 mapping : an observational studyP970Effect of coronary artery ectasia on left ventricular deformation mechanics. A 2D Speckle Tracking Echocardiography studyP971Diagnostic performance of stress Echo, SPECT, PET, stress CMR, CTCA, CTP and FFRCT for the assessment of CAD versus invasive FFR: a metaanalysisP972Utility of early assessment of myocardial mechanics in STEMI patients treated by primary percutaneous coronary intervention to predict major adverse cardiac events during the first 12 months of folloP973Role of left atrial reservoir in the prediction of increased left ventricular filling pressures in patients with ST-segment elevation myocardial infarctionP974Does the left ventricle ejection fraction improves the Grace risk score accuracy? P975Can we predict significant coronary stenosis using regional strain analysis in non-ST elevation acute coronary syndrome?P976Persistence of pulmonary hypertension after transcatheter aortic valve replacement: incidence and prognostic impactP977Global longitudinal strain is an independent predictor of all cause mortality in patients with severe aortic valve stenosis undergoing valve replacement or treated conservativallyP978Contribution of left ventricular diastolic dysfunction and myocardial fibrosis to pulmonary hypertension in severe aortic stenosisP979Left atrial dysfunction as a determinant of pulmonary hypertension in patients with isolated severe aortic stenosis and preserved left ventricular ejection fractionP980Intraprocedural monitoring protocol using routine transthoracic echocardiography with backup transesophageal probe in transcatheter aortic valve replacement: a single center experience. Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew260] [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: 11/13/2022] Open
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Durante CA, Santos-Neto EB, Azevedo A, Crespo EA, Lailson-Brito J. POPs in the South Latin America: Bioaccumulation of DDT, PCB, HCB, HCH and Mirex in blubber of common dolphin (Delphinus delphis) and Fraser's dolphin (Lagenodelphis hosei) from Argentina. Sci Total Environ 2016; 572:352-360. [PMID: 27509073 DOI: 10.1016/j.scitotenv.2016.07.176] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 05/30/2016] [Revised: 07/23/2016] [Accepted: 07/24/2016] [Indexed: 06/06/2023]
Abstract
Organic compounds, in particular organochlorines, are highly persistent compounds which accumulate in biotic and abiotic substrates. Marine mammals bioaccumulate and biomagnify persistent organic pollutants (POPs) through diet. ∑PCB (26 PCB congeners), ∑DDT (pp-DDT, pp-DDD, pp-DDE), ∑HCH (α-HCH, β-HCH, γ-HCH, δ-HCH), HCB and mirex were analyzed from samples of subcutaneous adipose tissue of common dolphins, Delphinus delphis, and Fraser's dolphins, Lagenodelphis hosei, obtained in 1999 and 2012. The aim of this study was to determine the concentrations of POPs to get baseline information on the current state of pollution by these compounds in these two species in South Atlantic. At the same time, to assess concentrations of POPs in relation to age, the total length and sexual maturity in common dolphins. Organochlorine pesticides dominated Fraser's dolphins, DDT being the most abundant, while PCBs were mostly present in common dolphins. In both species, the distributions of isomers or metabolites followed the order: β-HCH>δ-HCH>γ-HCH>α-HCH and pp-DDE>pp-DDD>pp-DDT. As for ∑PCB, the largest contribution was given by congeners of high molecular weight, particularly by hexa and hepta - CBs. Common dolphins did not show effects on sexual maturity, age and standard length in the concentration of organochlorines. The mean concentrations found in this study are lower compared to those reported in other studies performed in dolphins elsewhere. This study provides new information regarding levels of organochlorines in common dolphins for the Southwestern Atlantic.
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Affiliation(s)
- Cristian Alberto Durante
- Centro para el Estudio de Sistemas Marinos (CESIMAR), Centro Nacional Patagónico, CONICET, Bv. Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Bv. Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina.
| | - Elitieri Batista Santos-Neto
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil.
| | - Alexandre Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil.
| | - Enrique Alberto Crespo
- Centro para el Estudio de Sistemas Marinos (CESIMAR), Centro Nacional Patagónico, CONICET, Bv. Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Bv. Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina.
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil.
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Azevedo A, Nunes A, Roque C, Costa I, Gomes J, Lopo S. Molecular studies on HSV: Replication rate, infection capacity and progeny. J Clin Virol 2016. [DOI: 10.1016/j.jcv.2016.08.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Azevedo A, Prado A, Issa J, Gerlach R. Matrix metalloproteinase 2 fused to GFP, expressed in E. coli, successfully tracked MMP-2 distribution in vivo. Int J Biol Macromol 2016; 89:737-45. [DOI: 10.1016/j.ijbiomac.2016.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 01/22/2023]
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Pereira JM, Azevedo A, Basílio C, Sousa-Dias C, Mergulhão P, Paiva JA. Mid-regional proadrenomedullin: An early marker of response in critically ill patients with severe community-acquired pneumonia? Rev Port Pneumol (2006) 2016; 22:308-314. [PMID: 27160747 DOI: 10.1016/j.rppnen.2016.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Mid-regional proadrenomedullin (MR-proADM) is a novel biomarker with potential prognostic utility in patients with community-acquired pneumonia (CAP). PURPOSE To evaluate the value of MR-proADM levels at ICU admission for further severity stratification and outcome prediction, and its kinetics as an early predictor of response in severe CAP (SCAP). MATERIALS AND METHODS Prospective, single-center, cohort study of 19 SCAP patients admitted to the ICU within 12h after the first antibiotic dose. RESULTS At ICU admission median MR-proADM was 3.58nmol/l (IQR: 2.83-10.00). No significant association was found between its serum levels at admission and severity assessed by SAPS II (Spearman's correlation=0.24, p=0.31) or SOFA score (SOFA<10: <3.45nmol/l vs. SOFA≥10: 3.90nmol/l, p=0.74). Hospital and one-year mortality were 26% and 32%, respectively. No significant difference in median MR-proADM serum levels was found between survivors and non-survivors and its accuracy to predict hospital mortality was bad (aROC 0.53). After 48h of antibiotic therapy, MR-proADM decreased in all but 5 patients (median -20%; IQR -56% to +0.1%). Its kinetics measured by the percent change from baseline was a good predictor of clinical response (aROC 0.80). The best discrimination was achieved by classifying patients according to whether MR-proADM decreased or not within 48h. No decrease in MR-proADM serum levels significantly increased the chances of dying independently of general severity (SAPS II-adjusted OR 174; 95% CI 2-15,422; p=0.024). CONCLUSIONS In SCAP patients, a decrease in MR-proADM serum levels in the first 48h after ICU admission was a good predictor of clinical response and better outcome.
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Affiliation(s)
- J M Pereira
- Emergency and Intensive Care Department, Centro Hospitalar São João EPE, Porto, Portugal; Department of Medicine, University of Porto Medical School, Porto, Portugal.
| | - A Azevedo
- Hospital Epidemiology Centre, Centro Hospitalar São João EPE, Porto, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Portugal; EPIUnit - Institute of Public Health, University of Porto, Portugal
| | - C Basílio
- Emergency and Intensive Care Department, Centro Hospitalar São João EPE, Porto, Portugal
| | - C Sousa-Dias
- Emergency and Intensive Care Department, Centro Hospitalar São João EPE, Porto, Portugal
| | - P Mergulhão
- Emergency and Intensive Care Department, Centro Hospitalar São João EPE, Porto, Portugal; Department of Medicine, University of Porto Medical School, Porto, Portugal
| | - J A Paiva
- Emergency and Intensive Care Department, Centro Hospitalar São João EPE, Porto, Portugal; Department of Medicine, University of Porto Medical School, Porto, Portugal
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Silva ER, Sancinetti GS, Fransozo A, Azevedo A, Costa RC. Abundance and spatial-temporal distribution of the shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae): an exploited species in southeast Brazil. BRAZ J BIOL 2016; 76:764-73. [PMID: 27097079 DOI: 10.1590/1519-6984.01814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/10/2015] [Indexed: 11/21/2022] Open
Abstract
This study evaluated the abundance and spatial-temporal distribution of the shrimp Xiphopenaeus kroyeri in the coastal region of Macaé, state of Rio de Janeiro, southeastern Brazil. Monthly samples were obtained from March 2008 to February 2010 in six stations located in Inner (5, 10 and 15m depth) and Outer (25, 35 and 45m depth) areas. It was used a commercial fishery boat equipped with an otter-trawl net (3.5 m mouth width, mesh size 20mm and 15mm in the cod end). Water samples were taken for determination of temperature and salinity, and sediment samples for determination of texture and organic matter content. A total of 7146 shrimps were sampled. About 95% of all shrimps were caught in the shallow area, i.e., depths <20m. Greatest abundances were recorded in winter and spring. No significant correlation was observed between sediment (phi) and abundance. The distribution of X. kroyeri in the studied area was closely related to seasonal cold waterfront of the South Atlantic Central Water (SACW) and temperature was the main factor affecting the species abundance.
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Affiliation(s)
- E R Silva
- Núcleo em Ecologia e Desenvolvimento Sócio-Ambiental de Macaé, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Macaé RJ , Brazil, Núcleo em Ecologia e Desenvolvimento Sócio-Ambiental de Macaé - NUPEM, Universidade Federal do Rio de Janeiro - UFRJ, Av. Professor Aloísio Teixeira, campus UFRJ-Macaé, CEP 27971-550, Macaé, RJ, Brazil
| | - G S Sancinetti
- Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho", Universidade Estadual Paulista, Botucatu SP , Brazil, Núcleo de Estudos em Biologia, Ecologia e Cultivo de Crustáceos - NEBECC, Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, CEP 18618-000, Botucatu, SP, Brazil
| | - A Fransozo
- Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho", Universidade Estadual Paulista, Botucatu SP , Brazil, Núcleo de Estudos em Biologia, Ecologia e Cultivo de Crustáceos - NEBECC, Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, CEP 18618-000, Botucatu, SP, Brazil
| | - A Azevedo
- Núcleo em Ecologia e Desenvolvimento Sócio-Ambiental de Macaé, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Macaé RJ , Brazil, Núcleo em Ecologia e Desenvolvimento Sócio-Ambiental de Macaé - NUPEM, Universidade Federal do Rio de Janeiro - UFRJ, Av. Professor Aloísio Teixeira, campus UFRJ-Macaé, CEP 27971-550, Macaé, RJ, Brazil
| | - R C Costa
- Faculdade de Ciências, Universidade Estadual Paulista "Júlio de Mesquita Filho", Universidade Estadual Paulista, Bauru SP , Brazil, Laboratório de Biologia de Camarões Marinhos e de Água Doce - LABCAM, Departamento de Ciências Biológicas, Faculdade de Ciências, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, CEP 17033-360, Bauru, SP, Brazil
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Amaral Filho J, Azevedo A, Etchepare R, Rubio J. Removal of sulfate ions by dissolved air flotation (DAF) following precipitation and flocculation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.minpro.2016.01.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Elemam RF, Capelas JA, Vaz MAP, Viriato N, Pereira ML, Azevedo A, West J. Evaluating Transportation by Comparing Several uses of Rotary Endodontic Files. J Contemp Dent Pract 2015; 16:927-32. [PMID: 27018025 DOI: 10.5005/jp-journals-10024-1783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM To evaluate the frequent use of ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland) systems on shaping ability of root canal utilizing Solidworks (2014, Dassault Systemes) software. MATERIALS AND METHODS Thirty-six root canals in clear resin blocks (Dentsply-Maillefer) were allocated into six experimental groups (n = 36). Six new sets of PTN instruments (Dentsply Maillefer, Ballaigues, Switzerland) were used six times to shape the resin blocks. A #15 K-file was inserted to the working length (WL), followed by ProGlider (PG) to create a glide path. Sequential use of PTN instrumentation in a crown-down technique was used to reach size (30/07) apically. Macroscopic photos of the blocks were taken before and after instrumentation, layered by Paint Shop Pro 9 from JascSoftware, and then canal transportation was measured using Solidwork 2014. The data were analyzed by SPSS software version 22. Multivariate statistical analysis general linear model (GLM) was also applied. Bonferroni correction test was used in multiple comparisons and the statistical significance was set to 0.05. RESULTS There was no difference in canal transportation resulted from utilizing PTN files after six multiple uses; in addition, the PTN files showed ability to maintain the original canal anatomy, especially in the apical level, where lowest total mean value of canal center displacement was seen (3 mm level) (0.019 ± 0.017). CONCLUSION ProTaper Next files can be used to prepare single and multiple canals in a single furcated tooth. CLINICAL SIGNIFICANCE ProTaper Next nickel-titanium (NiTi) file system is a safe instrument that respects the canal shape, allows practitioners to treat difficult cases with good results, and low risk of separation.
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Affiliation(s)
- Ranya F Elemam
- PhD, Department of Endodontics, Faculty of Dental Medicine University of Porto, Rua Dr. Manuel Pereira da Silva 4200-393, Porto, Portugal Phone: +351 92005818, e-mail:
| | - J A Capelas
- Department of Endodontics, Faculty of Dental Medicine University of Porto, Porto, Portugal
| | - Mário A P Vaz
- Department of Mechanical Engineering, Faculty of Engineering University of Porto, Porto, Portugal
| | - Nuno Viriato
- Laboratory of Optics and Experimental Mechanics, INEGI-Institute of Mechanical Engineering and Industrial Management Porto, Portugal
| | - M L Pereira
- Faculty of Dental Medicine, University of Porto, EPI Unit-Institute of Public Health University of Porto, Porto, Portugal
| | - A Azevedo
- Faculty of Dental Medicine, University of Porto, EPI Unit-Institute of Public Health University of Porto, Porto, Portugal
| | - John West
- Department of Endodontics, University of Washington School of Dentistry, Washington, USA
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Mendes JBS, Alves Santos O, Meireles LM, Lacerda RG, Vilela-Leão LH, Machado FLA, Rodríguez-Suárez RL, Azevedo A, Rezende SM. Spin-Current to Charge-Current Conversion and Magnetoresistance in a Hybrid Structure of Graphene and Yttrium Iron Garnet. Phys Rev Lett 2015; 115:226601. [PMID: 26650313 DOI: 10.1103/physrevlett.115.226601] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Indexed: 05/22/2023]
Abstract
The use of graphene in spintronic devices depends, among other things, on its ability to convert a spin excitation into an electric charge signal, a phenomenon that requires a spin-orbit coupling (SOC). Here we report the observation of two effects that show the existence of SOC in large-area CVD grown single-layer graphene deposited on a single crystal film of the ferrimagnetic insulator yttrium iron garnet (YIG). The first is a magnetoresistance of graphene induced by the magnetic proximity effect with YIG. The second is the detection of a dc voltage along the graphene layer resulting from the conversion of the spin current generated by spin pumping from microwave driven ferromagnetic resonance into a charge current, which is attributed to the inverse Rashba-Edelstein effect.
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Affiliation(s)
- J B S Mendes
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brasil
| | - O Alves Santos
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - L M Meireles
- Departamento de Física, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brasil
| | - R G Lacerda
- Departamento de Física, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brasil
| | - L H Vilela-Leão
- Núcleo Interdisciplinar de Ciências Exatas e Inovação Tecnológica, Universidade Federal de Pernambuco, 55002-970 Caruaru, Pernambuco, Brasil
| | - F L A Machado
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - R L Rodríguez-Suárez
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
- Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago, Chile
| | - A Azevedo
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - S M Rezende
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
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