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Lima KOO, Tognella MMP, Andrade HA, Cunha SR, Pascoalini SS, Martins AS, Ghisolfi RD. Recruitment and mortality of Rhizophora mangle L. seedlings in the Tropical Southwestern Atlantic mangrove. BRAZ J BIOL 2024; 83:e278789. [PMID: 38422272 DOI: 10.1590/1519-6984.278789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 12/11/2023] [Indexed: 03/02/2024] Open
Abstract
Studies in the long-term recruitment and mortality of mangrove seedlings can help to understand mangrove demography and its relationship with climatic variables, environmental restoration and advances in the ecology of this ecosystem. A seven-year population dynamics study of seedling recruitment and mortality in cohorts of Rhizophora mangle L. was carried out to identify expansion processes and patterns of survival in the understory of mangrove forests on the Atlantic coast of Brazil. The present study aimed to evaluate the relationship between recruitment and mortality R. mangle seedlings at the population level, salinity, and climatic variables (precipitation, temperature and humidity). On an annual scale, seedling recruitment was positively correlated with mean temperature. Seedling density was negatively correlated with the number of recruits and positively with the number of deaths. The number of recruits was associated with dead seedlings, temperature and precipitation considering a population scale, without grouping the data. The seedling density in the stands increased with the number of dead seedlings. Our findings described the relationship between climate variability (durability and magnitude of the dry/rainy season) and the long-term population dynamics of R. mangle seedlings in a poorly studied region and from what moment, on a monthly and annual time scale, did this relationship become significant and changes occur. The findings of this study provide information on the population dynamics of the species that will help in understanding mangrove demography. These results have important implications for projections about the recruitment and survival of the species thinking about to long-term climate change that will modify current weather patterns and mangrove conservation efforts.
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Affiliation(s)
- K O O Lima
- Universidade Federal do Espírito Santo - UFES, Departamento de Oceanografia, Vitória, ES, Brasil
| | - M M P Tognella
- Universidade Federal do Espírito Santo - UFES, Departamento de Oceanografia, Vitória, ES, Brasil
- Universidade Federal do Espírito Santo - UFES, Centro Universitário Norte do Espírito Santo - CEUNES, Departamento de Ciências Agrárias e Biológicas, São Mateus, ES, Brasil
| | - H A Andrade
- Universidade Federal Rural de Pernambuco - UFRPE, Departamento de Pesca e Aquicultura, Laboratório de Modelagem Estatística Aplicada, Recife, PE, Brasil
| | - S R Cunha
- Universidade Federal de Pernambuco - UFPE, Departamento de Oceanografia, Recife, PE, Brasil
| | - S S Pascoalini
- Universidade Federal do Espírito Santo - UFES, Departamento de Oceanografia, Vitória, ES, Brasil
| | - A S Martins
- Universidade Federal do Espírito Santo - UFES, Departamento de Oceanografia, Vitória, ES, Brasil
| | - R D Ghisolfi
- Universidade Federal do Espírito Santo - UFES, Departamento de Oceanografia, Vitória, ES, Brasil
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Tavazzi E, Longato E, Vettoretti M, Aidos H, Trescato I, Roversi C, Martins AS, Castanho EN, Branco R, Soares DF, Guazzo A, Birolo G, Pala D, Bosoni P, Chiò A, Manera U, de Carvalho M, Miranda B, Gromicho M, Alves I, Bellazzi R, Dagliati A, Fariselli P, Madeira SC, Di Camillo B. Artificial intelligence and statistical methods for stratification and prediction of progression in amyotrophic lateral sclerosis: A systematic review. Artif Intell Med 2023; 142:102588. [PMID: 37316101 DOI: 10.1016/j.artmed.2023.102588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/14/2023] [Accepted: 05/16/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND Amyotrophic Lateral Sclerosis (ALS) is a fatal neurodegenerative disorder characterised by the progressive loss of motor neurons in the brain and spinal cord. The fact that ALS's disease course is highly heterogeneous, and its determinants not fully known, combined with ALS's relatively low prevalence, renders the successful application of artificial intelligence (AI) techniques particularly arduous. OBJECTIVE This systematic review aims at identifying areas of agreement and unanswered questions regarding two notable applications of AI in ALS, namely the automatic, data-driven stratification of patients according to their phenotype, and the prediction of ALS progression. Differently from previous works, this review is focused on the methodological landscape of AI in ALS. METHODS We conducted a systematic search of the Scopus and PubMed databases, looking for studies on data-driven stratification methods based on unsupervised techniques resulting in (A) automatic group discovery or (B) a transformation of the feature space allowing patient subgroups to be identified; and for studies on internally or externally validated methods for the prediction of ALS progression. We described the selected studies according to the following characteristics, when applicable: variables used, methodology, splitting criteria and number of groups, prediction outcomes, validation schemes, and metrics. RESULTS Of the starting 1604 unique reports (2837 combined hits between Scopus and PubMed), 239 were selected for thorough screening, leading to the inclusion of 15 studies on patient stratification, 28 on prediction of ALS progression, and 6 on both stratification and prediction. In terms of variables used, most stratification and prediction studies included demographics and features derived from the ALSFRS or ALSFRS-R scores, which were also the main prediction targets. The most represented stratification methods were K-means, and hierarchical and expectation-maximisation clustering; while random forests, logistic regression, the Cox proportional hazard model, and various flavours of deep learning were the most widely used prediction methods. Predictive model validation was, albeit unexpectedly, quite rarely performed in absolute terms (leading to the exclusion of 78 eligible studies), with the overwhelming majority of included studies resorting to internal validation only. CONCLUSION This systematic review highlighted a general agreement in terms of input variable selection for both stratification and prediction of ALS progression, and in terms of prediction targets. A striking lack of validated models emerged, as well as a general difficulty in reproducing many published studies, mainly due to the absence of the corresponding parameter lists. While deep learning seems promising for prediction applications, its superiority with respect to traditional methods has not been established; there is, instead, ample room for its application in the subfield of patient stratification. Finally, an open question remains on the role of new environmental and behavioural variables collected via novel, real-time sensors.
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Affiliation(s)
- Erica Tavazzi
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Enrico Longato
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Martina Vettoretti
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Helena Aidos
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Isotta Trescato
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Chiara Roversi
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Andreia S Martins
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Eduardo N Castanho
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Ruben Branco
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Diogo F Soares
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Alessandro Guazzo
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy
| | - Giovanni Birolo
- Department of Medical Sciences, University of Torino, Corso Dogliotti 14, Turin, 10126, Italy
| | - Daniele Pala
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, Pavia, 27100, Italy
| | - Pietro Bosoni
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, Pavia, 27100, Italy
| | - Adriano Chiò
- Department of Neurosciences "Rita Levi Montalcini", University of Turin, Via Cherasco 15, Turin, 10126, Italy
| | - Umberto Manera
- Department of Neurosciences "Rita Levi Montalcini", University of Turin, Via Cherasco 15, Turin, 10126, Italy
| | - Mamede de Carvalho
- Faculdade de Medicina, Instituto de Medicina Molecular João Lobo Antunes, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - Bruno Miranda
- Faculdade de Medicina, Instituto de Medicina Molecular João Lobo Antunes, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - Marta Gromicho
- Faculdade de Medicina, Instituto de Medicina Molecular João Lobo Antunes, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - Inês Alves
- Faculdade de Medicina, Instituto de Medicina Molecular João Lobo Antunes, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - Riccardo Bellazzi
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, Pavia, 27100, Italy
| | - Arianna Dagliati
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, Pavia, 27100, Italy
| | - Piero Fariselli
- Department of Medical Sciences, University of Torino, Corso Dogliotti 14, Turin, 10126, Italy
| | - Sara C Madeira
- LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisbon, 1749-016, Portugal
| | - Barbara Di Camillo
- Department of Information Engineering, University of Padova, Via Gradenigo 6/b, Padua, 35131, Italy; Department of Comparative Biomedicine and Food Science, University of Padova, Agripolis, Viale dell'Università, 16, Legnaro (PD), 35020, Italy.
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Garcia LR, Garzesi AM, Affonso PHDV, Tonon CR, Felicio ML, Brito FS, Martins AS, Campos NLKL, Okoshi MP, Paiva SAR, Minicucci MF, Polegato BF, Zornoff LAM. Thiamine as an outcome predictor in postoperative CABG patients. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Coronary artery bypass graft surgery (CABG) is one of the most performed cardiovascular procedures worldwide. Despite good outcomes, CABG induces systemic inflammation, increases oxidative stress and increases catabolism. As thiamine act as a cofactor in glucose metabolism and glutathione synthesis, its deficiency could have a high prevalence in critically ill patients.
Purpose
To assess the association between plasma thiamine concentrations and clinical outcomes and 30-day mortality in patients undergoing non-emergency CABG.
Methods
Prospective and observational study that included consecutive patients older than 18 years undergoing CABG that assigned the consent form. Plasma thiamine concentrations were determined before and 24 hours after the procedure by the high-performance liquid chromatography method. The clinical outcomes evaluated were perioperative acute myocardial infarction, heart failure, cardiogenic shock, arrhythmias, stroke and acute kidney injury. Mortality was evaluated on the 30th day after CABG.
Results
The study included 131 patients submitted to CABG. The mean age was 61±9.1 years, 73.3% were men, and the mean EuroScore II value was 1.78±1.3%. Before CABG, plasmatic thiamine concentration was 33±15ng/ml, and 15% of the patients had thiamine deficiency. After CABG, plasmatic thiamine concentration was 20±8ng/ml. All patients diminished plasmatic thiamine concentration after CABG. Mortality was 16% and 24% of patients presented acute kidney injury. Combined outcomes, which included the presence of acute myocardial infarction, heart failure, cardiogenic shock, arrhythmias, stroke, acute kidney injury or death, was present in 52% of the patients. Percentage of thiamine variation between before and after CABG was not associated with mortality (34±14 vs 41±10%; p=0.063); however, it was associated with acute kidney injury (40±14 vs 34±13%; p=0.027) and combined outcomes (37±13 vs 33±14%; p=0.035).
Conclusion
Percentage of thiamine variation from before to after CABG was associated with acute kidney injury and combined outcomes in these patients.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- L R Garcia
- UNESP, Medical School , Botucatu , Brazil
| | | | | | - C R Tonon
- UNESP, Medical School , Botucatu , Brazil
| | | | - F S Brito
- UNESP, Medical School , Botucatu , Brazil
| | | | | | - M P Okoshi
- UNESP, Medical School , Botucatu , Brazil
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Martins AS, Gromicho M, Pinto S, de Carvalho M, Madeira SC. Learning Prognostic Models Using Disease Progression Patterns: Predicting the Need for Non-Invasive Ventilation in Amyotrophic Lateral Sclerosis. IEEE/ACM Trans Comput Biol Bioinform 2022; 19:2572-2583. [PMID: 33961562 DOI: 10.1109/tcbb.2021.3078362] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Amyotrophic Lateral Sclerosis is a devastating neurodegenerative disease causing rapid degeneration of motor neurons and usually leading to death by respiratory failure. Since there is no cure, treatment's goal is to improve symptoms and prolong survival. Non-invasive Ventilation (NIV) is an effective treatment, leading to extended life expectancy and improved quality of life. In this scenario, it is paramount to predict its need in order to allow preventive or timely administration. In this work, we propose to use itemset mining together with sequential pattern mining to unravel disease presentation patterns together with disease progression patterns by analysing, respectively, static data collected at diagnosis and longitudinal data from patient follow-up. The goal is to use these static and temporal patterns as features in prognostic models, enabling to take disease progression into account in predictions and promoting model interpretability. As case study, we predict the need for NIV within 90, 180 and 365 days (short, mid and long-term predictions). The learnt prognostic models are promising. Pattern evaluation through growth rate suggests bulbar function and phrenic nerve response amplitude, additionally to respiratory function, are significant features towards determining patient evolution. This confirms clinical knowledge regarding relevant biomarkers of disease progression towards respiratory insufficiency.
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Del-Claro K, Rodriguez-Morales D, Calixto ES, Martins AS, Torezan-Silingardi HM. Ant pollination of Paepalanthus lundii (Eriocaulaceae) in Brazilian savanna. Ann Bot 2019; 123:1159-1165. [PMID: 30852596 PMCID: PMC6612938 DOI: 10.1093/aob/mcz021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND AIMS Ant-plant associations are widely diverse and distributed throughout the world, leading to complex ecological networks. Regarding ant-plant mutualism, ant pollination is a very rare interaction and few studies have shown the role of ants as pollinators. Therefore, we aimed to evaluate the role of ants as effective pollinators of Paepalanthus lundii (Eriocaulaceae) in a Brazilian savanna. METHODS Fieldwork with experimental manipulation was conducted to evaluate the fitness of P. lundii, considering potential pollinators. For this, we mainly observed the number of seeds produced in different conditions: control, ant exclusion, exclusion of flying insects, and exclusion (entomophily test) of both ants and flying insects. Furthermore, we evaluated all floral visitors throughout the day, stigma receptivity, the numbers of male and female flowers, and patterns of species co-occurrence, which can indicate the presence of different pollinators in the plants at the same time. KEY RESULTS We observed a relation between seed production and ant visits; Camponotus crassus was the most frequent floral visitor and the most effective pollinator. Also, we observed a statistical difference between the numbers of male and female flowers produced, with a greater number of male flowers. Furthermore, P. lundii presented flowering asynchrony, with 12 different types of maturation sequence, which indicates a cross-pollination system. Lastly, we observed an overlap of the greatest abundance of C. crassus and the time of plant stigmatic receptivity, and a pattern of non co-occurrence of ants, which shows the pollinator role of this ant. CONCLUSIONS Our data provide evidence that previous generalizations neglecting the importance of ants as pollinators are wrong. Brazilian savanna can reveal a lot about the ant-pollination syndrome, since this environment presents peculiar characteristics related to this association. Thus, this study has great significance for the understanding of the ant-pollination syndrome, and for the understanding of the complex ecological networks present in these dry arid systems.
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Affiliation(s)
- K Del-Claro
- Instituto de Biologia, LECI (Laboratório de Ecologia Comportamental e de Interações), Pós-graduação em Ecologia e Conservação de Recursos Naturais, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - D Rodriguez-Morales
- Instituto de Ecología A.C., Red de Interacciones Multitróficas, Carretera antigua a Coatepec, El Haya, Xalapa, Veracruz, Mexico
| | - E S Calixto
- Programa de Pós-Graduação em Entomologia, Faculdade de Filosofia, Ciências e Letras, Universidade de São Paulo, Av. Bandeirantes, Ribeirão Preto, SP, Brazil
| | - A S Martins
- Instituto de Biologia, LECI (Laboratório de Ecologia Comportamental e de Interações), Pós-graduação em Ecologia e Conservação de Recursos Naturais, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - H M Torezan-Silingardi
- Instituto de Biologia, LECI (Laboratório de Ecologia Comportamental e de Interações), Pós-graduação em Ecologia e Conservação de Recursos Naturais, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
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Magagnin CM, Rozales FP, Antochevis L, Nunes LS, Martins AS, Barth AL, Sampaio JM, Zavascki AP. Dissemination of bla OXA-370 gene among several Enterobacteriaceae species in Brazil. Eur J Clin Microbiol Infect Dis 2017; 36:1907-1910. [PMID: 28555403 DOI: 10.1007/s10096-017-3012-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/08/2017] [Indexed: 12/11/2022]
Abstract
OXA-370 is a recently described OXA-48 variant that has only been described in a few Enterobacter spp. and Klebsiella pneumoniae isolates. The purpose of this study is to assess the prevalence of OXA-370-producing isolates in carbapenem-nonsusceptible Enterobacteriaceae recovered from 28 hospitals from Brazil. Real-time PCR was used to determine the presence of bla NDM-1, bla KPC-2, bla VIM-type, bla GES-type, bla OXA-48-like, and bla IMP-type genes. A total of 4,451 Enterobacteriaceae were screened. The gene bla OXA-48-like was detected in 74 (2.5%) isolates, mostly of Enterobacter spp. (44.6% E. cloacae and 2.7% E. aerogenes) and Klebsiella spp. (31.1% K. pneumoniae and 6.7% K. oxytoca), followed by Escherichia coli, (6.7%), Morganella morganii, (2.7%), Citrobacter freundii (1.3%), Proteus mirabilis (1.3%), Providencia stuartii (1.3%), and Serratia spp. (1.3%). These isolates were from five hospitals, 67 (90.5%) from the hospital where the bla OXA-370 was first described. Sequencing of bla OXA-48-like was performed in 52 isolates, including E. cloacae, E. aerogenes, K. pneumoniae, K. oxytoca, E. coli, and C. freundii; all presenting 100% identity with bla OXA-370. PFGE revealed the presence of distinct clones among K. pneumoniae, E. cloacae, K. oxytoca, and E. coli. Susceptibility rates to meropenem, imipenem, and ertapenem among OXA-370-producing isolates were 92.3%, 78.8%, 7.7% respectively; the MIC50 /MIC90 were 0.38/2 mg/L and 1/3 mg/L for meropenem and imipenem respectively. Overall, antimicrobial susceptibility analysis suggests that OXA-370 lacks carbapenemase activity. Our study demonstrated that the bla OXA-370 gene is disseminated among several Enterobacteriaceae species and clones, indicating a high potential for dissemination.
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Affiliation(s)
- C M Magagnin
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil. .,Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
| | - F P Rozales
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - L Antochevis
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - L S Nunes
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Universidade Federal do Pampa (UNIPAMPA), Campus Uruguaiana, Brazil
| | - A S Martins
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - A L Barth
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS) - Centro de Pesquisa Experimental - Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - J M Sampaio
- Departamento de Análises Clínicas e Toxicológicas-Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil.,Microbiology Section, Fleury Medicine and Health, São Paulo, São Paulo, Brazil
| | - A P Zavascki
- Infectious Diseases Service, Hospital de Clínicas de Porto, Porto Alegre, Brazil.,Department of Internal Medicine, Medical School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Renner S, Martins AS, Streckel E, Braun-Reichart C, Kessler B, Bähr A, Rathkolb B, Prehn C, Adamski J, Hrabe de Angelis M, Wolf E. Impaired glucose tolerance in newborn piglets exposed to mild hyperglycemia in utero. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1601612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Renner
- Chair for Molecular Animal Breeding and Biotechnology, Ludwig-Maximilians-Universität München, Münster, Germany
| | | | - E Streckel
- Chair for Molecular Animal Breeding and Biotechnology, Ludwig-Maximilians-Universität München, München, Germany
| | - C Braun-Reichart
- Chair for Molecular Animal Breeding and Biotechnology, Ludwig-Maximilians-Universität München, München, Germany
| | - B Kessler
- Chair for Molecular Animal Breeding and Biotechnology, Ludwig-Maximilians-Universität München, München, Germany
| | - A Bähr
- Chair for Molecular Animal Breeding and Biotechnology, Ludwig-Maximilians-Universität München, München, Germany
| | - B Rathkolb
- Institute of Experimental Genetics, HelmholtzZentrum, Neuherberg, Germany
| | - C Prehn
- Institute of Experimental Genetics, HelmholtzZentrum, Neuherberg, Germany
| | - J Adamski
- Institute of Experimental Genetics, HelmholtzZentrum, Neuherberg, Germany
| | - M Hrabe de Angelis
- Institute of Experimental Genetics, HelmholtzZentrum, Neuherberg, Germany
| | - E Wolf
- German Center for Diabetes Research (DZD), München, Germany
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Simon T, Pinheiro HT, Moura RL, Carvalho-Filho A, Rocha LA, Martins AS, Mazzei E, Francini-Filho RB, Amado-Filho GM, Joyeux JC. Mesophotic fishes of the Abrolhos Shelf, the largest reef ecosystem in the South Atlantic. J Fish Biol 2016; 89:990-1001. [PMID: 27094882 DOI: 10.1111/jfb.12967] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
Fishes inhabiting rhodolith beds and reefs at mesophotic depths on the Abrolhos Shelf, which encompasses the largest and richest coral reef formation in the South Atlantic Ocean, were assessed through technical diving and remotely operated vehicles (ROVs). A total of 74 fish species were recorded, including at least one new species, one new record for the south-western Atlantic and six new records for the Abrolhos region. Overfishing, mining and port activities are already threatening many endangered and commercially important species recorded on the mesophotic reefs of Abrolhos Shelf, and the establishment of marine protected areas and off-reserve fisheries regulations are urgently needed.
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Affiliation(s)
- T Simon
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Goiabeiras, Vitória, ES, 29075-910, Brazil
| | - H T Pinheiro
- California Academy of Sciences, 55 Music Concourse Drive, Golden Gate Park, San Francisco, CA, 94118, U.S.A
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 100 Shaffer Road, Santa Cruz, CA, 95060, U.S.A
| | - R L Moura
- Instituto de Biologia and SAGE/COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21944-970, Brazil
| | - A Carvalho-Filho
- Fish Bizz Ltda., Rua Moncorvo Filho 51, São Paulo, SP, 05507-060, Brazil
| | - L A Rocha
- California Academy of Sciences, 55 Music Concourse Drive, Golden Gate Park, San Francisco, CA, 94118, U.S.A
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 100 Shaffer Road, Santa Cruz, CA, 95060, U.S.A
| | - A S Martins
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Goiabeiras, Vitória, ES, 29075-910, Brazil
| | - E Mazzei
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Goiabeiras, Vitória, ES, 29075-910, Brazil
| | - R B Francini-Filho
- Departamento de Engenharia e Meio Ambiente, Universidade Federal da Paraíba, Rio Tinto, PB, 58109-753, Brazil
| | - G M Amado-Filho
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, RJ, 22460-030, Brazil
| | - J-C Joyeux
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Goiabeiras, Vitória, ES, 29075-910, Brazil
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Veríssimo-Alves M, Amorim RG, Martins AS. Comment on "Line of Dirac Nodes in Hyperhoneycomb Lattices". Phys Rev Lett 2016; 116:249701. [PMID: 27367411 DOI: 10.1103/physrevlett.116.249701] [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] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Indexed: 06/06/2023]
Affiliation(s)
- Marcos Veríssimo-Alves
- Departamento de Física, ICEx, Universidade Federal Fluminense, Rua Desembargador Ellis Hermydio Figueira, 783 Bairro Aterrado, Volta Redonda, RJ CEP 27213-145, Brazil
| | - Rodrigo G Amorim
- Departamento de Física, ICEx, Universidade Federal Fluminense, Rua Desembargador Ellis Hermydio Figueira, 783 Bairro Aterrado, Volta Redonda, RJ CEP 27213-145, Brazil
| | - A S Martins
- Departamento de Física, ICEx, Universidade Federal Fluminense, Rua Desembargador Ellis Hermydio Figueira, 783 Bairro Aterrado, Volta Redonda, RJ CEP 27213-145, Brazil
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10
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Lessa LL, Martins AS, Fellows CE. Note: Cold spectra of the electronic transition A(2)Σ(+)-X(2)Π of N2O(+) radical: High resolution analysis of the bands 000-100, 100-100, and 001-101. J Chem Phys 2015; 143:166101. [PMID: 26520556 DOI: 10.1063/1.4934786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
In this note, three vibrational bands of the electronic transition A(2)Σ(+)-X(2)Π of the N2O(+) radical (000-100, 100-100, and 001-101) were theoretically analysed. Starting from Hamiltonian models proposed for this kind of molecule, their parameters were calculated using a Levenberg-Marquardt fit procedure in order to reduce the root mean square deviation from the experimental transitions below to 0.01 cm(-1). The main objective of this work is to obtain new and reliable values for rotational constant B″ and the spin-orbit interaction parameter A of the analysed vibrational levels of the X(2)Π electronic state of this molecule.
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Affiliation(s)
- L L Lessa
- Departamento de Física, Instituto de Ciências Exatas-ICEx, Universidade Federal Fluminense, Campus do Aterrado, Volta Redonda, RJ 27213-415, Brazil
| | - A S Martins
- Departamento de Física, Instituto de Ciências Exatas-ICEx, Universidade Federal Fluminense, Campus do Aterrado, Volta Redonda, RJ 27213-415, Brazil
| | - C E Fellows
- Departamento de Física, Instituto de Ciências Exatas-ICEx, Universidade Federal Fluminense, Campus do Aterrado, Volta Redonda, RJ 27213-415, Brazil
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11
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Martins AS, Baldani MH, Wambier DS. Prevalence of Dental Caries and Related Factors among Youth Law Offenders Attended by the Socioeducation Center of Ponta Grossa, Brazil. Pesqui Bras Odontopediatria Clín Integr 2014. [DOI: 10.4034/pboci.2014.143.07] [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: 11/15/2022] Open
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12
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Andrades R, Pinheiro HT, Santos RG, Martins AS, Costa PAS. A new record of whale shark Rhincodon typus in Brazilian waters: a report of association with Caranx crysos. J Fish Biol 2012; 81:2092-2094. [PMID: 23130705 DOI: 10.1111/j.1095-8649.2012.03460.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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In May 2011, a Rhincodon typus was sighted on the continental shelf of the central Brazilian coast, in the vicinity of a gas platform. During the video record, an interspecific following association was observed between a Caranx crysos school and the R. typus.
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Affiliation(s)
- R Andrades
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Goiabeiras, Vitória, Espirito Santo, Brazil.
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13
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Del Puerto HL, Martins AS, Braz GF, Alves F, Heinemann MB, Rajão DS, Araújo FC, Martins SF, Nascimento DR, Leite RC, Vasconcelos AC. Vero cells infected with the Lederle strain of canine distemper virus have increased Fas receptor signaling expression at 15 h post-infection. Genet Mol Res 2011; 10:2527-33. [PMID: 22009866 DOI: 10.4238/2011.october.18.3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We evaluated the expression of the Fas receptor gene in Vero cells infected with the Lederle vaccine strain of canine distemper virus using RT-PCR. Vero cells were plated, and after being grown for 24 h in MEM with 5% FBS, 80-90% confluent monolayer cultures were infected with the virus. The cells were harvested at 3, 6, 9, and 15 h post-infection. Uninfected Vero cells were used as a control. Total RNA was isolated from Vero cells using 1 mL Trizol(®) LS, and RT was performed using 2 μg total RNA. Primer pairs for RT-PCR amplification for the canine distemper virus nucleocapsid gene, the S26 reference gene, and the Vero rFas gene were used to analyze expression in Vero cells. RT-PCR results revealed virus activity at 3, 6, 9, and 15 h in the virus-infected Vero cells. The S26 housekeeping gene was amplified in virus infected and control samples. However, expression of the cell death receptor Fas was detected in Vero cells only at 15 h post-infection. We suggest that the Lederle vaccine induces apoptosis by Fas receptor signaling, possibly through caspase-8 signaling rather than through mitochondrial signaling in the infected cells.
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Affiliation(s)
- H L Del Puerto
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
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14
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Almeida AP, Moreira LMP, Bruno SC, Thomé JCA, Martins AS, Bolten AB, Bjorndal KA. Green turtle nesting on Trindade Island, Brazil: abundance, trends, and biometrics. ENDANGER SPECIES RES 2011. [DOI: 10.3354/esr00357] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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15
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Del Puerto HL, Martins AS, Moro L, Milsted A, Alves F, Braz GF, Vasconcelos AC. Caspase-3/-8/-9, Bax and Bcl-2 expression in the cerebellum, lymph nodes and leukocytes of dogs naturally infected with canine distemper virus. Genet Mol Res 2010; 9:151-61. [PMID: 20198571 DOI: 10.4238/vol9-1gmr717] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Canine distemper is an immunosuppressive disease caused by the canine distemper virus (CDV). Pathogenesis mainly involves the central nervous system and immunosuppression. Dogs naturally infected with CDV develop apoptotic cells in lymphoid tissues and the cerebellum, but this apoptotic mechanism is not well characterized. To better understand this process, we evaluated the expression of Bax, Bcl-2, and caspase-3, -8 and -9, by evaluating mRNA levels in the peripheral blood, lymph nodes and cerebellum of CDV-infected (CDV+) and uninfected (CDV-) dogs by real-time polymerase chain reaction (PCR). Blood samples from 12 CDV+ and 8 CDV- dogs, diagnosed by reverse transcription-PCR, were subjected to hematological analysis and apoptotic gene expression was evaluated using real-time-PCR. Tissues from the cerebellum and lymph nodes of four CDV+ and three CDV-dogs were also subjected to real time-PCR. No significant differences were found between CDV+ and CDV- dogs in the hemotological results or in the expression of caspase-3, -8, -9, Bax, and Bcl-2 in the peripheral blood. However, expression of Bax, caspase-3, -8 and -9 was significantly higher in the cerebellum of CDV+ compared to CDV- dogs. Expression of caspase-3 and -8 was significantly higher in the lymph nodes of CDV+ compared to CDV- dogs. We concluded that infection with CDV induces apoptosis in the cerebellum and lymph nodes in different ways. Lymph node apoptosis apparently occurs via caspase-3 activation, through the caspase-8 pathway, and cerebellum apoptosis apparently occurs via caspase-3 activation, through the caspase-8 and mitochondrial pathways.
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Affiliation(s)
- H L Del Puerto
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
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16
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Araújo FC, Oliveira CA, Reis AB, Del Puerto HL, Martins AS, Reis FM. Expression of the proto-oncogene c-fos and the immunolocalization of c-fos, phosphorylated c-fos and estrogen receptor beta in the human testis. Histol Histopathol 2009; 24:1515-22. [PMID: 19795350 DOI: 10.14670/hh-24.1515] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Spermatogenesis is under the control of a complex endocrine and paracrine system, including estrogen receptor (ER) signaling. In many target cells, ER promotes the transcription of c-fos and other proto-oncogenes to regulate cell growth and differentiation. Thus, in this study we evaluated the expression of the proto-oncogene c-fos and the immunolocalization of c-fos, phosphorylated c-fos and ERbeta proteins in the human testis. Testis tissue samples were obtained from 12 men undergoing orchiectomy as adjuvant treatment for prostate cancer, and were stained by immunohistochemistry for c-fos, phosphorylated c-fos and ERbeta localization. Both forms of c-fos proteins were immunoreactive, mainly in germ cells (spermatogonia, spermatocytes and spermatids) and Sertoli cells, while ERbeta was primarily present in somatic cells (Leydig, Sertoli and myofibrillar cells). In addition, testicular biopsies obtained from infertile men with obstructive azoospermia/normal spermatogenesis (n=8) or non-obstructive azoospermia/severely impaired spermatogenesis (n=12) were evaluated for c-fos and ERbeta mRNA levels using real time polymerase chain reaction. The expression of c-fos mRNA was significantly lower (fold change = 0.08, p<0.05) whereas that of ERbeta mRNA was higher (fold change = 9.43, p<0.05) in the testis of men with non-obstructive azoospermia compared to those with obstructive azoospermia. These findings suggest a complex interrelation between estrogen signaling and c-fos transcriptional activity within the human testis, with the increase of ERbeta mRNA being putatively a compensatory mechanism for lower c-fos expression in infertile men with damaged spermatogenesis.
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Affiliation(s)
- F C Araújo
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Herrero-Martín D, Osuna D, Ordóñez JL, Sevillano V, Martins AS, Mackintosh C, Campos M, Madoz-Gúrpide J, Otero-Motta AP, Caballero G, Amaral AT, Wai DH, Braun Y, Eisenacher M, Schaefer KL, Poremba C, de Alava E. Stable interference of EWS-FLI1 in an Ewing sarcoma cell line impairs IGF-1/IGF-1R signalling and reveals TOPK as a new target. Br J Cancer 2009; 101:80-90. [PMID: 19491900 PMCID: PMC2694277 DOI: 10.1038/sj.bjc.6605104] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Ewing sarcoma is a paradigm of solid tumour -bearing chromosomal translocations resulting in fusion proteins that act as deregulated transcription factors. Ewing sarcoma translocations fuse the EWS gene with an ETS transcription factor, mainly FLI1. Most of the EWS-FLI1 target genes still remain unknown and many have been identified in heterologous model systems. METHODS We have developed a stable RNA interference model knocking down EWS-FLI1 in the Ewing sarcoma cell line TC71. Gene expression analyses were performed to study the effect of RNA interference on the genetic signature of EWS-FLI1 and to identify genes that could contribute to tumourigenesis. RESULTS EWS-FLI1 inhibition induced apoptosis, reduced cell migratory and tumourigenic capacities, and caused reduction in tumour growth. IGF-1 was downregulated and the IGF-1/IGF-1R signalling pathway was impaired. PBK/TOPK (T-LAK cell-originated protein kinase) expression was decreased because of EWS-FLI1 inhibition. We showed that TOPK is a new target gene of EWS-FLI1. TOPK inhibition prompted a decrease in the proliferation rate and a dramatic change in the cell's ability to grow in coalescence. CONCLUSION This is the first report of TOPK activity in Ewing sarcoma and suggests a significant role of this MAPKK-like protein kinase in the Ewing sarcoma biology.
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Affiliation(s)
- D Herrero-Martín
- Molecular Pathology Program, Centro de Investigación del Cáncer-IBMCC (USAL-CSIC), Campus Unamuno s/n, Salamanca, Spain.
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18
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Freitas MAR, Vianna EN, Martins AS, Silva EF, Pesquero JL, Gomes MA. A single step duplex PCR to distinguish Entamoeba histolytica from Entamoeba dispar. Parasitology 2004; 128:625-8. [PMID: 15206464 DOI: 10.1017/s0031182004005086] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In this study, a single-step duplex polymerase chain reaction procedure was developed for rapid, specific and sensitive identification of Entamoeba histolytica and for its diagnostic differentiation from E. dispar. Specific oligonucleotide primers were combined for the amplification of a cysteine proteinase 5 gene target sequence of 242 bp, present only in E. histolytica. Additionally, another oligonucleotide primer pair for both the E. histolytica and E. dispar actin gene target of 300 bp was designed to amplify only from amoebae DNA. The PCR developed was specific and efficiently identified and differentiated these parasites from each other in either cultured parasites or from stool material.
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Affiliation(s)
- M A R Freitas
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, CEP: 31270-901 Belo Horizonte, MG, Brasil
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19
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Moro L, Martins AS, Alves CM, Santos FGA, Del Puerto HL, Vasconcelos AC. Apoptosis in the cerebellum of dogs with distemper. J Vet Med B Infect Dis Vet Public Health 2003; 50:221-5. [PMID: 12864896 DOI: 10.1046/j.1439-0450.2003.00657.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Canine distemper virus (CDV) may induce multifocal demyelination in the central nervous system of infected dogs. The pathogenesis of this process is not clear. The present work identifies the presence of apoptotic cells in white and grey matter of dogs'cerebellum, naturally infected with CDV. Fifteen dogs with clinical signs of canine distemper that tested positive for CDV nucleoprotein were used. Brain specimens were processed and embedded in paraffin. Sections 5 microm thick were stained with hematoxylin-eosin and Shorr. Other sections were submitted to TUNEL reaction and to immunohistochemistry for CDV nucleoprotein detection. Acute and chronic demyelinated plaques were observed in the white matter, while apoptosis occurred particularly in the granular layer of grey matter. Apoptosis seems to play an important role in the pathogenesis of canine distemper demyelination.
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Affiliation(s)
- L Moro
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31 270-901, Belo Horizonte, Brasil.
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20
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Martins AS, Melo GM, Valério JB, Langner E, Lage HT, Tincani AJ. Treatment of locally aggressive well-differentiated thyroid cancer. Int Surg 2001; 86:213-9. [PMID: 12056464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
The object of this study, conducted at Unicamp between 1988 and 1998, was to evaluate retrospectively the outcome of patients treated for locally aggressive well-differentiated thyroid carcinomas (LATC). Nineteen (42%) of 45 patients with thyroid carcinomas were considered to have LATC. The preoperative diagnosis of carcinoma was made either by fine needle aspiration biopsy (15 patients) or during surgery (4 patients). The usual prognostic factors were analyzed and classified according to risk groups. Survival was evaluated using the Kaplan-Meier method. Most of the patients were female (73%), with a mean age of 48 years. Eighteen (95%) had papillary carcinomas. Four patients were classified as high risk (21%) and the remaining 15 (79%) as intermediate risk. All patients underwent total thyroidectomy and different types of neck dissections. The structures invaded by tumors were strap muscles and trachea (four cases); recurrent nerve and larynx (three cases); manubrium, esophagus, and jugular vein (two cases); and hyoid bone and pharynx (one case). Complete tumor resection was carried out according to the extent of local invasion; no postoperative deaths resulted. Details of the procedures are provided in Table 4 and in the Discussion. Postoperative radioactive iodine treatment was used in 15 patients (79%). A mean follow-up (+/-7 years) revealed 13 (68%) patients without disease, 4 patients (21%) alive with controlled systemic disease, and 2 (11%) deaths from distant metastasis. The Kaplan-Meir survival curve was comparable with other studies in the literature. This study found that the frequency of LATC (42%) was higher than in most studies. Aggressive surgical therapy to treat these tumors is compatible with a low recurrence rate and long-term survival in a significant proportion of patients.
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Affiliation(s)
- A S Martins
- Department of Surgery-Faculty of Medical Sciences, State University of Campinas, São Paulo, Brazil.
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Abstract
BACKGROUND Specific reports about neck node metastasis in cervical esophageal tumors and mediastinal node metastasis in patients with pharyngolaryngoesophageal tumors are lacking. This study was undertaken to evaluate the need for neck and mediastinal lymph node dissection when dealing with carcinomas of this region. METHODS A retrospective review of the records of 34 patients who underwent total pharyngolaryngoesophagectomy and gastric transposition (TPLEGT) for squamous cell carcinoma of the pharyngoesophageal junction was done. Sixteen patients had esophageal carcinomas, 14 had hypopharyngeal carcinomas, and 4 had laryngeal carcinomas. The mediastinal dissection was designed to remove mainly the paratracheal and paraesophageal lymph nodes down to the aortic arch, without thoracotomy. Neck and mediastinal lymph node metastases were studied with specific reference to main primary site, and comparison with the literature was undertaken. RESULTS Twenty-five neck dissections were performed in 19 patients and yielded positive nodes in 16 patients (47% of all patients). The neck nodes were positive in 75%, 64.2%, and 18.7% of the patients with laryngeal, hypopharyngeal, and esophageal carcinomas, respectively. Mediastinal dissection data were available on 27 patients, and 16 (59.2%) had mediastinal node metastasis. These mediastinal nodes were positive in 0%, 72.7%, and 61.5% of the patients with laryngeal, hypopharyngeal, and esophageal carcinomas, respectively. CONCLUSIONS There is little controversy about neck dissections in tumors of the larynx and hypopharynx when a TPLEGT is contemplated. A similar situation applies to mediastinal dissections for cervical esophageal carcinomas. Although we observed a low incidence of positive neck nodes (18.7%) in patients with cervical esophageal carcinomas, there is a need for a larger prospective series. Our finding of 72.7% positive mediastinal nodes in hypopharyngeal carcinomas is high enough to deserve further study. Laryngeal carcinomas showed no positive mediastinal nodes in this series.
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Affiliation(s)
- A S Martins
- Head and Neck Service, Department of Surgery, Faculty of Medical Sciences, State University Of Campinas (Unicamp), Rua Roxo Moreira, No. 1234, Cidade Universitaria, 13083-591, Campinas, São Paulo, Brazil.
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Martins AS, Aguilera NW, Matsubara BB, Bregagnollo EA. Experimental myocardial hypertrophy induced by a minimally invasive ascending aorta coarctation. Braz J Med Biol Res 2001; 34:413-5. [PMID: 11262594 DOI: 10.1590/s0100-879x2001000300017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Ascending aorta coarctation was produced by a minimally invasive technique in rabbits. Animal mortality was 5%. Morphometric and hemodynamic parameters were evaluated. A parabiotically isolated heart model was used to assess the hemodynamic parameters. Left ventricular weight/body weight ratio and muscle area showed clear evidence of hypertrophy when compared to control. The hemodynamic changes in the isolated heart model suggested decreased diastolic and systolic function in the coarcted group. The present model produced hypertrophy with low mortality rates as a result of its less invasive nature.
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Affiliation(s)
- A S Martins
- Departamento de Cirurgia e Ortopedia, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil.
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Abstract
In this study, an improved polymerase chain reaction (PCR) was used for detection of DNA of latent EHV-1 strains from several sources. Three pairs of oligonucleotide primers spanning fragments of 333 bp, 226 bp and 268 bp of the thymidine kinase (tk) gene, and one primer pair spanning 225 bp of the glycoprotein C (gC) gene were used in specific amplifications. Primers for EHV-4 PCR were also designed. Restriction digests with TaqI confirmed the identity of tk PCR fragments from EHV-1. The sensitivity to detect PCR products was further improved by visualisation in silver-stained acrylamide gels. PCR assays were applied to 267 samples including pools of tissue, peripheral blood leukocytes (PBL) and nasal swabs of archived, farms and abattoir specimens from a total of 116 animals. The EHV-1 DNA was found in 88% of the analysed samples. The prevalence of the EHV-1 latent or persistent form in adult horses was similar to others reports but found higher than previously described in foetuses and young foals. EHV-4 latency was not detected in the Brazilian studied specimens.
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Affiliation(s)
- R Carvalho
- Ministério da Agricultura e do Abastecimento, Belo Horizonte, MG, Brazil
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24
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Abstract
Carcinomas of the pharyngo-oesophageal junction continue to be a challenge to head and neck surgeons. We report a series of 30 patients who underwent gastric transposition for advanced pharyngo-oesophageal tumours, with personal insights about the surgical technique and the need for neck and mediastinal node dissection. The median hospital stay was 21.6 days, with resumption of oral feedings around the 16th day in 91.7 per cent of the surgical survivors. Ten patients had multiple primary tumours (33.3 per cent), with 20 per cent of synchronous carcinomas. Serious local and systemic complications occurred in 17 patients (56.7 per cent), the most important being tracheal complications, cervical and systemic infections, fistulas, rupture of major vessels and pulmonary embolus. Post-operative deaths occurred in 20 per cent of the patients. The locoregional control of disease was significant (only 14.2 per cent of deaths from regional recurrence) but 64.2 per cent of the patients died from distant metastasis. Survival without disease was 13.3 per cent at five years. Gastric transposition was judged to be the procedure of choice for palliation or occasional cure in patients with pharyngo-oesophageal tumours.
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Affiliation(s)
- A S Martins
- Department of Surgery, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Sao Paulo, Brazil.
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Carvalho R, Passos LM, Martins AS. Development of a differential multiplex PCR assay for equine herpesvirus 1 and 4 as a diagnostic tool. J Vet Med B Infect Dis Vet Public Health 2000; 47:351-9. [PMID: 10900826 DOI: 10.1046/j.1439-0450.2000.00361.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this study, a multiplex polymerase chain reaction (PCR) procedure was developed for differentiation of strains and field isolates of equine herpesvirus type 1 (EHV-1) and type 4 (EHV-4). Specific oli-gonucleotide primers were combined to amplify the thymidine kinase (TK) gene region of EHV-1 and EHV-4, which would yield fragments of different lengths for each virus in the same amplification reaction. The specificity of the largest PCR amplicon for EHV-4 was confirmed by restriction digestion with HindIII. The multiplex PCR proved to be a fast and sensitive method for typing EHV-1 and EHV-4 isolates and for detection and differentiation of both viruses in field samples in which infectious virus is no longer available. The sensitivity was improved by combining cycling optimization and visualization of PCR products in ethidium bromide and silver-stained acrylamide gels.
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Affiliation(s)
- R Carvalho
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, UFMG, Belo Horizonte, Brazil
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Tincani AJ, Brandalise N, Andreollo NA, Lopes LR, Montes CG, Altemani A, Martins AS. [Importance of upper digestive endoscopy using lugol dye solution for the diagnosis of superficial esophageal cancer and dysplasia in patients with head and neck neoplasms]. Arq Gastroenterol 2000; 37:107-13. [PMID: 11144012 DOI: 10.1590/s0004-28032000000200007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Head and neck cancer has a high incidence in Brazil, with cancer of the oral cavity being one of the five most common cancers among Brazilians. Alcohol and tobacco consumption may contribute to synchronous or metachronous head and neck cancer and esophageal cancer. A prospective study involving 60 patients with head and neck cancer was carried out at the State University of Campinas--UNICAMP, Campinas, SP, Brazil to screen for superficial esophageal cancer and dysplasia using endoscopy and a 2% lugol dye solution followed by biopsy of the suspicious areas. Five patients (8.3%) had superficial esophageal cancer, which was diagnosed as intraepithelial carcinoma in three of them (5.0%). In four patients, the superficial esophageal cancer was synchronous and in one it was metachronous to head and neck cancer. Five patients (8.3%) had dysplasias in the esophageal epithelium (three were classified as mild and two as moderate). These results demonstrate the value of endoscopic screening of the esophagus using lugol dye in patients with head and neck cancer, particularly since superficial esophageal cancer is extremely difficult to detect by conventional methods in asymptomatic patients.
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Affiliation(s)
- A J Tincani
- Disciplina de Cirurgia de Cabeça e Pescoço do Departamento de Cirurgia da Universidade Estadual de Campinas-UNICAMP, Campinas, SP.
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27
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Tincani AJ, Brandalise N, Altemani A, Scanavini RC, Valério JB, Lage HT, Molina G, Martins AS. Diagnosis of superficial esophageal cancer and dysplasia using endoscopic screening with a 2% lugol dye solution in patients with head and neck cancer. Head Neck 2000. [PMID: 10679905 DOI: 10.1002/(sici)1097-0347(200003)22] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Head and neck cancer (HNC) has a high incidence in Brazil, with cancer of the oral cavity being one of the five most common cancers among Brazilians. Alcohol and tobacco consumption may contribute to synchronous or metachronous HNC and esophageal cancer. The early detection of superficial esophageal cancer and dysplasia in asymptomatic patients with HNC, after successfully treating the primary cancer, may provide an effective cure. METHODS A prospective study involving 60 patients with HNC was carried out at the State University of Campinas (UNICAMP) to screen for superficial esophageal cancer and dysplasia using endoscopy and a 2% lugol dye solution followed by biopsy of the suspicious areas. RESULTS Five patients (8.3%) had superficial esophageal cancer, which was diagnosed as intraepithelial carcinoma in three of them (5.0%). In four patients, the superficial esophageal cancer was synchronous, and in one it was metachronous to HNC. Five patients (8.3%) had dysplasias in the esophageal epithelium (three were classified as mild and two as moderate). CONCLUSION These results demonstrate the value of endoscopic screening of the esophagus using lugol dye in patients with HNC, particularly because superficial esophageal cancer is extremely difficult to detect by conventional methods in asymptomatic patients.
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Affiliation(s)
- A J Tincani
- Head and Neck Service, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
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Abstract
BACKGROUND Pharyngoesophageal tumors pose a challenge to surgical management, and there is controversy in the literature as to the best procedure to be used. Advantages and disadvantages are mentioned for total pharyngolaryngoesophagectomy and gastric transposition (PLE>), free jejunal transplants, and free forearm flaps. One of the arguments for PLE> is the persistence or subsequent occurrence of multiple primaries in a field cancerization region. Multiple tumors in the head and neck/esophagus/lung axis have been reported. However, despite extensive investigation, there is little information on specific multicentricity in patients treated with PLE> for pharyngolaryngoesophageal carcinomas. METHODS A clinicopathological study was undertaken in 35 consecutive patients who underwent PLE> for pharyngoesophageal cancer to evaluate synchronicity, multicentricity, and metachronicity. Only in situ and invasive carcinomas were considered. The findings were compared with the reports in the literature. RESULTS Thirty-eight tumors were diagnosed preoperatively, with the main indications for PLE> being tumors located in the esophagus or hypopharynx (32 patients) and larynx (three patients). After the surgical treatment, 21 patients had single primaries (60%) and 14 (40%) had 25 multiple primaries in addition to their main primaries (total of 60 tumors in the whole group). Synchronous, previous metachronous and subsequent metachronous carcinomas occurred in 26%, 17%, and 8.5% of the instances, respectively. Twenty of the 25 multicentric carcinomas were invasive (80%). Either the main primaries or the multicentric carcinomas were located in the esophagus or hypopharynx (91.5% and 60%, respectively). Other sites included the larynx, oropharynx, oral cavity, and lung. CONCLUSION The incidence of multicentric tumors in patients with pharyngoesophageal carcinomas may favor total PLE> as the procedure of choice, because it includes all the condemned upper pharyngolaryngoesophageal mucosa.
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Affiliation(s)
- A S Martins
- Head And Neck Service, Department of Surgery, Faculty of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil.
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Tincani AJ, Brandalise N, Altemani A, Scanavini RC, Valério JB, Lage HT, Molina G, Martins AS. Diagnosis of superficial esophageal cancer and dysplasia using endoscopic screening with a 2% lugol dye solution in patients with head and neck cancer. Head Neck 2000. [PMID: 10679905 DOI: 10.1002/(sici)1097-0347(200003)22:2%3c170::aid-hed9%3e3.0.co;2-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Head and neck cancer (HNC) has a high incidence in Brazil, with cancer of the oral cavity being one of the five most common cancers among Brazilians. Alcohol and tobacco consumption may contribute to synchronous or metachronous HNC and esophageal cancer. The early detection of superficial esophageal cancer and dysplasia in asymptomatic patients with HNC, after successfully treating the primary cancer, may provide an effective cure. METHODS A prospective study involving 60 patients with HNC was carried out at the State University of Campinas (UNICAMP) to screen for superficial esophageal cancer and dysplasia using endoscopy and a 2% lugol dye solution followed by biopsy of the suspicious areas. RESULTS Five patients (8.3%) had superficial esophageal cancer, which was diagnosed as intraepithelial carcinoma in three of them (5.0%). In four patients, the superficial esophageal cancer was synchronous, and in one it was metachronous to HNC. Five patients (8.3%) had dysplasias in the esophageal epithelium (three were classified as mild and two as moderate). CONCLUSION These results demonstrate the value of endoscopic screening of the esophagus using lugol dye in patients with HNC, particularly because superficial esophageal cancer is extremely difficult to detect by conventional methods in asymptomatic patients.
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Affiliation(s)
- A J Tincani
- Head and Neck Service, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
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30
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Abstract
BACKGROUND Pharyngoesophageal tumors pose a challenge to surgical management, and there is controversy in the literature as to the best procedure to be used. Advantages and disadvantages are mentioned for total pharyngolaryngoesophagectomy and gastric transposition (PLE>), free jejunal transplants, and free forearm flaps. One of the arguments for PLE> is the persistence or subsequent occurrence of multiple primaries in a field cancerization region. Multiple tumors in the head and neck/esophagus/lung axis have been reported. However, despite extensive investigation, there is little information on specific multicentricity in patients treated with PLE> for pharyngolaryngoesophageal carcinomas. METHODS A clinicopathological study was undertaken in 35 consecutive patients who underwent PLE> for pharyngoesophageal cancer to evaluate synchronicity, multicentricity, and metachronicity. Only in situ and invasive carcinomas were considered. The findings were compared with the reports in the literature. RESULTS Thirty-eight tumors were diagnosed preoperatively, with the main indications for PLE> being tumors located in the esophagus or hypopharynx (32 patients) and larynx (three patients). After the surgical treatment, 21 patients had single primaries (60%) and 14 (40%) had 25 multiple primaries in addition to their main primaries (total of 60 tumors in the whole group). Synchronous, previous metachronous and subsequent metachronous carcinomas occurred in 26%, 17%, and 8.5% of the instances, respectively. Twenty of the 25 multicentric carcinomas were invasive (80%). Either the main primaries or the multicentric carcinomas were located in the esophagus or hypopharynx (91.5% and 60%, respectively). Other sites included the larynx, oropharynx, oral cavity, and lung. CONCLUSION The incidence of multicentric tumors in patients with pharyngoesophageal carcinomas may favor total PLE> as the procedure of choice, because it includes all the condemned upper pharyngolaryngoesophageal mucosa.
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Affiliation(s)
- A S Martins
- Head And Neck Service, Department of Surgery, Faculty of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil.
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31
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Tincani AJ, Brandalise N, Altemani A, Scanavini RC, Valério JB, Lage HT, Molina G, Martins AS. Diagnosis of superficial esophageal cancer and dysplasia using endoscopic screening with a 2% lugol dye solution in patients with head and neck cancer. Head Neck 2000; 22:170-4. [PMID: 10679905 DOI: 10.1002/(sici)1097-0347(200003)22:2<170::aid-hed9>3.0.co;2-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Head and neck cancer (HNC) has a high incidence in Brazil, with cancer of the oral cavity being one of the five most common cancers among Brazilians. Alcohol and tobacco consumption may contribute to synchronous or metachronous HNC and esophageal cancer. The early detection of superficial esophageal cancer and dysplasia in asymptomatic patients with HNC, after successfully treating the primary cancer, may provide an effective cure. METHODS A prospective study involving 60 patients with HNC was carried out at the State University of Campinas (UNICAMP) to screen for superficial esophageal cancer and dysplasia using endoscopy and a 2% lugol dye solution followed by biopsy of the suspicious areas. RESULTS Five patients (8.3%) had superficial esophageal cancer, which was diagnosed as intraepithelial carcinoma in three of them (5.0%). In four patients, the superficial esophageal cancer was synchronous, and in one it was metachronous to HNC. Five patients (8.3%) had dysplasias in the esophageal epithelium (three were classified as mild and two as moderate). CONCLUSION These results demonstrate the value of endoscopic screening of the esophagus using lugol dye in patients with HNC, particularly because superficial esophageal cancer is extremely difficult to detect by conventional methods in asymptomatic patients.
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Affiliation(s)
- A J Tincani
- Head and Neck Service, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
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32
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Abstract
CONTEXT Thyroglossal duct cysts are the most common congenital cervical abnormality in childhood. Malignant lesions are rare in thyroglossal duct cysts (about 1%). OBJECTIVE To report a case of papillary carcinoma in thyroglossal duct cysts. DESIGN Case report. CASE REPORT The patient was a 21-year-old female with a four-month history of an anterior midline neck mass but without other symptoms. The physical examination revealed a 4.0 cm diameter, smooth, painless, cystic nodule at the level of the hyoid bone. The thyroid gland was normal by palpation and no neck lymph nodes were found. Indirect laryngoscopy, fine-needle biopsy aspiration and cervical ultrasound were normal and compatible with the physical findings of a thyroglossal duct cyst. The patient underwent surgery with this diagnosis, under general anesthesia, and the mass was resected by the usual Sistrunk procedure. There were no local signs of invasion of the tissue surrounding the cyst or duct at surgery. The patient was discharged within 24 hours. Histopathological examination of the specimen showed a 3.5 x 3.0 x 3.0 cm thyroglossal cyst, partially filled by a solid 1.0 x 0.5 cm brownish tissue. Histological sections showed a papillary carcinoma in the thyroid tissue of a thyroglossal cyst, with normal thyroid tissue at the boundary of the carcinoma. There was no capsule invasion and the margins were negative. The follow-up of the patient consisted of head and neck examinations, ultrasonography of the surgical region and thyroid, and total body scintigraphy. The patient has been followed up for two years with no further evidence of disease.
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Affiliation(s)
- A S Martins
- Head and Neck Service, Department of Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas, Brazil.
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Martins AS, Souza AL, Souza LS, Lage HT. Surgical procedures for primary, metastatic or adjacent parotid tumours. Int Surg 1999; 84:318-25. [PMID: 10667811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
OBJECTIVE The retrospective analysis of the surgical procedures in primary parotid and metastatic or adjacent parotid tumors. PATIENTS AND METHODS Retrospective review of the records of 145 patients operated on for primary, metastatic or adjacent parotid tumors revealed 85 patients with benign tumors, 24 with primary malignant tumors, 19 with squamous skin carcinomas, 12 with skin melanomas, 3 with basocellular carcinomas and 2 with sarcomas of the parotid region. The analysis included the type of parotidectomy, the need for facial nerve sacrifice (FNS), type of neck dissection and soft part reconstruction. RESULTS Superficial parotidectomy was performed in 81% of the benign parotid tumors and 100% of skin melanomas. Total parotidectomy was frequent in malignant parotid tumors (62%), epidermoid skin tumors (64%) and in basocellular/sarcomas of the parotid region (80%). Skin graft or flaps was infrequent in primary malignant tumors (12.5%), and frequent in epidermoid skin tumors (74%), melanomas (58%) and basocellular/sarcomas (100%). FNS was necessary in primary malignant (25%), adjacent epidermoid (37%), melanomas (17%) and basocellular/sarcomas (80%). Details on neck dissections are provided. CONCLUSIONS Superficial parotidectomy was an adequate procedure for most benign parotid tumors and for melanoma patients. In primary malignant and adjacent or metastatic skin tumors, total parotidectomy, neck dissection and soft part reconstruction were frequent procedures. FNS and soft part reconstruction should be anticipated more frequently in squamous/basocellular skin tumors or sarcomas adjacent to the parotid gland.
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Affiliation(s)
- A S Martins
- Department of Surgery, Faculty of Medical Sciences, State University of Campinas, São Paulo, Brazil.
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Martins AS, Lage HT, Melo GM. Gastric transposition with pharyngogastric stapler anastomosis. J Surg Oncol 1999; 72:39-41. [PMID: 10477878 DOI: 10.1002/(sici)1096-9098(199909)72:1<39::aid-jso12>3.0.co;2-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- A S Martins
- Head and Neck Service, Department of Surgery, Faculty of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil.
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35
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Martins AS. Total posterior tracheal wall resection and reconstruction with pharyngolaryngoesophagectomy. Surgery 1999; 125:357-62. [PMID: 10076624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
BACKGROUND Extensive posterior tracheal wall invasion in pharyngoesophageal carcinomas is considered by many authors to be a contraindication for total pharyngolaryngoesophagectomy and gastric transposition (TPLEGT). The purpose of this report is to challenge this concept and to illustrate posterior tracheal wall resection in selected cases followed by reconstruction of the trachea by anastomosis of the remnant trachea to the anterior gastric wall without thoracotomy. PATIENTS AND METHODS Four of 36 consecutive patients (11%) undergoing TPLEGT were treated with the following procedure: 3 patients had cervical esophageal carcinomas and 1 had a postcricoid carcinoma. All the patients had longitudinal involvement of the posterior wall of the trachea, which necessitated resection within 1.5 to 2.0 cm of the carina. The technique consisted of removing the specimen en bloc with the posterior wall of the trachea. Without the specimen in place, the surgical field at the thoracic inlet was large enough to permit a continuous running suture between the remnant tracheal wall and the serosa of the transposed stomach. The pharyngogastric anastomosis was subsequent to this procedure. RESULTS One patient died in the hospital after complications of chylothorax and sepsis, but this was unrelated to the gastrotracheal anastomosis. One patient died of pneumonia after a cerebrovascular accident 2 months after the procedure. Two patients had effective palliation for 9 and 18 months, respectively. CONCLUSION TPLEGT may be used in selected patients with pharyngoesophageal tumors. The anterior wall of the stomach is a suitable substitute for the posterior tracheal wall. The gastric bulging into the trachea is not enough to obstruct the lumen. However, we caution that tracheal involvement should be limited to the midline and that there is a potential for a gastrotracheal fistula.
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Affiliation(s)
- A S Martins
- Department of Surgery, Faculty of Medical Sciences (Unicamp), Cidade Universitaria, Campinas, Brazil
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36
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Abstract
BACKGROUND AND OBJECTIVES Transmediastinal gastric transposition and pharyngogastric anastomosis is perhaps one of the most widely accepted methods for restoration of the alimentary continuity after pharyngoesophageal resection. The need of neck dissection, mediastinal tracheostomy, and previous radiotherapy may favor exposure and rupture of major vessels. Protection with omentum may prevent this complication. A comprehensive review of omentum flap use in surgery was undertaken. METHODS A modified omentum pedicled flap was used in 6 out of 36 patients submitted to total pharyngolaryngoesophagectomy and gastric transposition (PLE>). RESULTS None of the patients had major vessel rupture as compared with a 13% carotid and innominate artery rupture of a series of 30 patients previously operated on without omentum pedicled flap protection. CONCLUSIONS The omental pedicled flap, performed as described, may provide reliable protection for carotid and innominate artery exposure, adding little time to the procedure.
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Affiliation(s)
- A S Martins
- Department of Surgery, Faculty of Medical Sciences, State University of Campinas, Unicamp, Sao Paulo, Brazil
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37
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Abstract
CONTEXT Parapharyngeal space tumors comprise less than 0.5% of all head and neck neoplasms. The majority of these tumors are benign, but surgery is usually required to establish the diagnosis and treat the patients. We present 26 patients treated surgically for tumors arising in the parapharyngeal space (PPS) at the State University of Campinas Hospital--UNICAMP. CASES SERIES Of these, 17 (65.5%) had benign and 9 (34.6%) malignant neoplasms. The surgical and pathological data relevant to these cases are highlighted, observing any local recurrence, surgical complications and the five-year survival. Neurogenic tumors and soft tissue sarcomas were, respectively, the most frequent benign (35.3%) and malignant neoplasms (44.5%). Benign tumors accounted for the majority of the cases and involved minimal surgical morbidity with no recurrence during a median follow-up of five years. Malignant tumors had a high rate of recurrence and mortality. Surgery is the treatment of choice for PPS tumors. A knowledge of the anatomy of this site is essential for the safe performance of surgical procedures. Malignant neoplasms have a poor prognosis. Fine needle aspiration was helpful in diagnosis of all tumors.
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Affiliation(s)
- A J Tincani
- Department of Surgery, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Brazil
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38
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Senanayake PS, Smeby RR, Martins AS, Moriguchi A, Kumagai H, Ganten D, Brosnihan KB. Adrenal, kidney, and heart angiotensins in female murine Ren-2 transfected hypertensive rats. Peptides 1998; 19:1685-94. [PMID: 9880073 DOI: 10.1016/s0196-9781(98)00123-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
We analyzed by high-performance liquid chromatography and radioimmunoassay angiotensin I (Ang I), Ang II, Ang-(1-7), and metabolites in the adrenal, kidney and heart of normotensive female Sprague-Dawley (SD) and transgenic hypertensive [TGR(mRen-2)27] rats carrying the murine Ren-2d renin gene. The monogenetic model of hypertensive rats had significant increases in adrenal Ang II; whereas in the kidney Ang II was unchanged, but Ang I and Ang-(1-7) were significantly lower. Cardiac Ang I, Ang II, and Ang-(2-10) were significantly reduced in transgenic rats, while Ang-(2-7) was increased. In SD and transgenic rats kidney and adrenal angiotensins increased primarily during estrus or proestrus. In female transgenic rats the increased adrenal Ang II and the sustained renal Ang II may contribute to the established phase of hypertension.
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Affiliation(s)
- P S Senanayake
- Eye Institute, The Cleveland Clinic Foundation, OH 44195, USA.
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39
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Tincani AJ, Martins AS, Lage HDT, Souza LS. Melanoma ganglionic metastasis 30 years after treatment of the primary tumor--a case report. SAO PAULO MED J 1996; 114:1131-3. [PMID: 9077023 DOI: 10.1590/s1516-31801996000200005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The recurrence of melanoma in patients is well-documented, and is dependent on a number of factors. We report a case in which a patient had a case of ganglionar metastasis in the neck after a 30-year disease-free interval following primary treatment.
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Affiliation(s)
- A J Tincani
- Department of Surgery, School for Medical Science, State University of Campinas (UNICAMP), Brazil
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40
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Abstract
A 2288-bp cDNA sequence encoding dihydrolipoamide dehydrogenase (DLDH; dihydrolipoamide: NAD+ oxido-reductase; EC 1.8.1.4) was obtained by isolating a 1762-bp cDNA clone from a canine skeletal muscle library in the vector, lambda UNIZAP, combined with PCR amplification of the 5' end of the mRNA. The DLDH cDNA sequence contains a 49-bp G+C-rich 5'-untranslated region (UTR), followed by 1527 bp of coding region, and 695 bp of 3'-UTR preceding a 17-bp poly(A) tail. The single open reading frame encodes a precursor DLDH of 509 amino acids (aa) that begins with a 35-aa leader sequence. The 3'-UTR includes six possible polyadenylation signals (three AATAAA, one TATAAA and two AATGAA) and one potential stem-loop region extending from bp 1969-1991. Alignment studies of the canine and human DLDH demonstrate homology within the coding region of 98% at the aa level and 94% at the nt level. Northern blot analysis using the cDNA clone as probe showed wide tissue distribution of the mRNA, with differences in the level of expression among tissues and possible utilization of different polyadenylation sites.
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Affiliation(s)
- A S Martins
- Department of Brain and Vascular Research, Cleveland Clinic Foundation, OH 44195, USA
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41
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Martins AS. The treatment of fixed and semi-fixed cervical metastases in head and neck cancer. Rev Paul Med 1993; 111:27-32. [PMID: 8108643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- A S Martins
- School of Medical Sciences Head and Neck Service, Surgical Department, Hospital das Clínicas UNICAMP, Campinas, SP
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Santos AA, Xavier-Neto J, Santiago Júnior AT, Souza MA, Martins AS, Alzamora F, Rola FH. Acute volaemic changes modify the gastroduodenal resistance to the flow of saline in anaesthetized dogs. Acta Physiol Scand 1991; 143:261-9. [PMID: 1772034 DOI: 10.1111/j.1748-1716.1991.tb09231.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The effect of acute and sequential volaemic changes on the gastroduodenal flow of saline was assessed in 23 anaesthetized dogs following two different experimental protocols. Hypervolaemia, by i.v. infusion of saline, induced a gradual decrease on gastroduodenal flow which amounted to 76% below control values (P less than 0.001) when volaemic expansion attained 5% of body weight. This effect was volume dependent (17% increase on gastroduodenal flow per volume of infused saline equivalent to 0.5% of body weight, P less than 0.001), lasted for at least 90 minutes after infusion was completed and was also obtained by expanding previously bled animals. Hypovolaemia due to bleeding was followed by an increase on gastroduodenal flow of about 88% above control values (P less than 0.05) when haemorrhage was equal to 3% of body weight. This effect was also volume dependent (23% increase on gastroduodenal flow per volume of blood shed equivalent to a 0.5% of body weight, P less than 0.01) and was reversed after blood volume was restored. These modifications in the resistance of the gastroduodenal segment to the flow of liquid due to acute volaemic changes suggest that the extracellular fluid volume modulates the contractile activity of the gastroduodenal portion of the gut possibly to set a gastroduodenal handling of liquid adequate to cope with volaemic imbalances.
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Affiliation(s)
- A A Santos
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza Brazil
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43
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Abstract
The stop-flow technique was used to determine the site of entry of kininase II into tubular fluid in dogs. Stop-flow patterns were constructed for kininase II, p-aminohippurate, sodium, and potassium. The proximal tubule was localized by the peak of p-aminohippurate concentration and the distal tubule by the minimum sodium concentration. In the stop-flow pattern for kininase II, three peaks (a, b, and c) were observed. A main peak (a), located 2.25 +/- 0.45 ml distal to the p-aminohippurate peak (p less than 0.01) and 3.75 +/- 0.31 ml proximal to the minimum sodium concentration (p less than 0.001), was observed in all experiments. Peak c, located 2.6 +/- 0.4 ml (p less than 0.01) proximal to the p-aminohippurate peak, was observed in five dogs. Peak b appeared in five dogs and was always located 2.0 ml distal to the minimum sodium concentration. This peak was coincident with the potassium peak. Only two of eight experiments showed all three peaks. These results showed that the major kininase II entry into the tubular fluid is near the p-aminohippurate peak and that distal entry occurred in 63% of the dogs.
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Affiliation(s)
- J F Cardini
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
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