39 results on '"Bittencourt, Henrique"'
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2. Los atributos fisicoquímicos del suelo son influenciados por el tipo de manejo del campo nativo
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Proner Júnior, Luigildo, Bittencourt, Henrique von Hertwig, Dias, Juliano Cesar, Grillo, José Francisco, and Bonome, Lisandro Tomas da Silva
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Pastagem natural ,Natural grassland ,Sobressemeadura ,Siega ,Pasto natural ,Roçada ,Mowing ,Resiembra ,Fogo ,Overseeding ,Fuego ,Fire - Abstract
The objective of the present work was to evaluate the influence of different pasture management strategies in a grassland on the physicochemical characteristics of the soil. For that, a field experiment was carried out, testing overseeding, mowing, use of fire and absence of management in a randomized block design with four replications. A higher level of soil compaction was recorded in the treatments with fire and mowing compared to the absence of management and overseeding. All treatments increased soil organic matter contents, with the greatest variation occurring in the mowing and the smallest in the fire. The H+Al contents increased in all treatments with the greatest variation occurring in the absence of management and the smallest in the mowing and fire. Potassium content decreased only in overseeding and increased more significantly in fire. Phosphorus content increased in overseeding and more significantly in fire. Base saturation decreased in all treatments, more significantly in overseeding and in the absence of management. The results show changes in important parameters for the agricultural use of grassland soil, suggesting that, in general, the use of overseeding and mowing practices present a more favorable change potential than the absence of management or use of fire. El objetivo del presente trabajo fue evaluar la influencia de diferentes estrategias de manejo de pastos en pastizal nativo sobre las características fisicoquímicas del suelo. Para ello, se realizó un experimento de campo, ensayando resiembra, siega, uso de fuego y ausencia de manejo en un diseño de bloques al azar con cuatro repeticiones. Se registró un mayor nivel de compactación del suelo en los tratamientos con fuego y siega frente a la ausencia de manejo y resiembra. Todos los tratamientos incrementaron los contenidos de materia orgánica del suelo, ocurriendo la mayor variación en la siega y la menor en el fuego. Los contenidos de H+Al aumentaron en todos los tratamientos ocurriendo la mayor variación en ausencia de manejo y la menor en la siega y fuego. El contenido de potasio disminuyó solo en la resiembra y aumentó más significativamente en el fuego. El contenido de fósforo aumentó en la resiembra y más significativamente en el fuego. La saturación de bases disminuyó en todos los tratamientos, más significativamente en resiembra y en ausencia de manejo. Los resultados muestran cambios en parámetros importantes para el uso agrícola del suelo de pastizales nativos, sugiriendo que, en general, el uso de prácticas de resiembra y siega presentan un potencial de cambio más favorable que la ausencia de manejo o uso del fuego. O objetivo do presente trabalho foi avaliar a influência de diferentes estratégias de manejo da pastagem em campo nativo sobre características físico-químicas do solo. Para tanto foi realizado um experimento a campo testando sobressemeadura, roçada, uso de fogo e ausência de manejo em delineamento de blocos casualizados com quatro repetições. Maior nível de compactação do solo foi registrado nos tratamentos com uso de fogo e roçada em comparação a ausência de manejo e a sobressemeadura. Todos os tratamentos aumentaram os teores de matéria orgânica do solo, com a maior variação ocorrendo na roçada e a menor no fogo. Os teores de H+Al aumentaram em todos os tratamentos com a maior variação ocorrendo na ausência de manejo e a menor na roçada e fogo. O teor de potássio diminuiu apenas na sobressemeadura e aumentou mais expressivamente no fogo. O teor de fósforo aumentou na sobresemeadura e mais expressivamente no fogo. A saturação de bases diminuiu em todos os tratamentos, mais expressivamente na sobressemeadura e na ausência de manejo. Os resultados apresentam modificações de parâmetros importantes para o uso agropecuário dos solo de campo nativo, sugerindo que de maneira geral, a utilização de práticas de sobresemeadura e roçada apresentam potencial de alteração mais favorável que ausência de manejo ou uso do fogo.
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- 2022
3. Association Between the Magnitude of Intravenous Busulfan Exposure and Development of Hepatic Veno-Occlusive Disease in Children and Young Adults Undergoing Myeloablative Allogeneic Hematopoietic Cell Transplantation
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Bognàr, Tim, Bartelink, Imke H, Egberts, Toine C G, Rademaker, Carin M A, Versluys, A Birgitta, Slatter, Mary A, Kletzel, Morris, Nath, Christa E, Cuvelier, Geoffrey D E, Savic, Rada M, Dvorak, Christopher, Long-Boyle, Janel R, Cowan, Morton J, Bittencourt, Henrique, Bredius, Robbert G M, Güngör, Tayfun, Shaw, Peter J, Ansari, Marc, Hassan, Moustapha, Krajinovic, Maja, Hempel, Georg, Marktel, Sarah, Chiesa, Robert, Théoret, Yves, Lund, Troy, Orchard, Paul J, Wynn, Robert F, Boelens, Jaap Jan, Lalmohamed, Arief, Afd Pharmacoepi & Clinical Pharmacology, Pharmacoepidemiology and Clinical Pharmacology, Afd Pharmacoepi & Clinical Pharmacology, Pharmacoepidemiology and Clinical Pharmacology, Clinical pharmacology and pharmacy, and CCA - Cancer Treatment and quality of life
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Medicine(all) ,Transplantation ,Transplantation Conditioning ,Hematopoietic cell transplantation ,Sinusoidal obstruction syndrome ,Veno-occlusive disease ,Hematopoietic Stem Cell Transplantation ,Hepatic Veno-Occlusive Disease ,Hematopoietic cell ,Hematology ,Cell Biology ,Young Adult ,Humans ,Immunology and Allergy ,Molecular Medicine ,Administration, Intravenous ,Busulfan exposure ,Child ,Busulfan - Abstract
Intravenous busulfan is widely used as part of myeloablative conditioning regimens in children and young adults undergoing allogeneic hematopoietic cell transplantation (HCT). Hepatic veno-occlusive disease/sinusoidal obstruction syndrome (VOD/SOS) is a serious clinical problem observed with busulfan-based conditioning HCT. The development of VOD/SOS may be associated with busulfan exposure. Getting more insight into the association between busulfan exposure and the development of VOD/SOS enables further optimization of dos-ing and treatment strategies. The objective of this study was to assess the association between the magnitude of busulfan exposure and the occurrence of VOD/SOS in children and young adults undergoing myeloablative con-ditioning with a busulfan-containing regimen before allogeneic HCT. In this observational study we included all patients who underwent allogeneic HCT with intravenous busulfan as part of the conditioning regimen at 15 pediatric transplantation centers between 2000 and 2015. The endpoint was the development of VOD/SOS. The magnitude of busulfan exposure was estimated using nonlinear mixed effect modeling and expressed as the maximal concentration (Cmax; day 1 and day 1 to 4 Cmax), cumulative area under the curve (AUC; day 1, high-est 1-day AUC in 4 days, and 4-day cumulative AUC), cumulative time above a concentration of 300 mg/L, and clearance on day 1. A total of 88 out of 697 patients (12.6%) developed VOD/SOS. The number of alkylators in the conditioning regimen was a strong effect modifier; therefore we stratified the regression analysis for the number of alkylators. For patients receiving only busulfan as one alkylator (36.3%, n = 253), cumulative busulfan exposure (>78 mg x h/L) was associated with increased VOD/SOS risk (12.6% versus 4.7%; odds ratio [OR] = 2.95, 95% confidence interval [CI] 1.13 to 7.66). For individuals receiving busulfan with one or two addi-tional alkylators (63.7%, n = 444), cumulative busulfan exposure (78 mg x h/L) did not further increase the risk of VOD/SOS (15.4% versus 15.2%; OR = 1.03, 95% CI 0.61 to 1.75). The effect of the magnitude of busulfan exposure on VOD/SOS risk in children and young adults undergoing HCT is dependent on the number of alkylators. In patients receiving busulfan as the only alkylator, higher cumulative busulfan exposure increased the risk of VOD/SOS, whereas in those receiving multiple alkylators, the magnitude of busulfan expo-sure did not further increase this risk. (c) 2022 The American Society for Transplantation and Cellular Therapy. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
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- 2022
4. Estudo de viabilidade do reaproveitamento de água de chuva na cidade de Belo Horizonte-MG para utilização residencial
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Fábio Henrique Silva Alvim and Álvaro Bittencourt Henrique Silva
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Dentro do novo paradigma de desenvolvimento urbano que se estabeleceu devido à ameaça aos recursos hídricos, tornou-se necessária a busca por meios sustentáveis neste milênio, visando reduzir o consumo exacerbado de água e o incentivo à elaboração de soluções de reutilização desse bem essencial de consumo. Uma dessas alternativas que tem se mostrado promissora é o reaproveitamento da água da chuva. O objetivo do trabalho desenvolver um estudo de caso e avaliar a viabilidade de implantação de um sistema de captação da água da chuva em uma residência localizada no município de Belo Horizonte-MG, com o intuito de reduzir o consumo de água distribuído pela Companhia de Saneamento de Minas Gerais (COPASA). A metodologia utilizada consiste em estimar e dimensionar todas as variáveis que afetam o processo, como a precipitação, a área de coleta e demanda dos moradores, analisando a viabilidade econômica do sistema proposto e considerando o valor gasto e a sua respectiva economia anual na despesa da concessionária pública. A partir das etapas metodológicas do estudo de caso, foi definido uma caixa d’água com capacidade de 5m³ ocasionando em um valor de investimento para instalação do projeto em R$ 4.991,85, bem como concluiu-se ainda que o tempo de retorno do valor investido será de 10 anos e os moradores após esse tempo economizariam um valor de R$ 5.120,91 ao longo dos 10 anos restantes do projeto. Dessa forma o projeto proposto torna-se viável com a economia gerada no longo prazo. As áreas de Engenharia Civil e Arquitetura possuem um papel muito importante nesse sentido, uma vez que diversas edificações já começaram a se adaptar aos novos tempos e a adotar a solução do aproveitamento de água da chuva.
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- 2021
5. Water restriction, salinity and depth influence the germination and emergence of sourgrass
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Zambão, Jackson, v.H. Bittencourt, Henrique, T.S. Bonome, Lisandro, M. Trezzi, Michelangelo, and C.P.P. Fernandes, Augusto
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seeding depth ,water stress ,Digitaria insularis ,food and beverages - Abstract
Background: Substantial losses to crops can occur due to the presence of sourgrass in agroecosystems, which is promoted by its seed dispersal ability. Environmental factors can affect sourgrass germination and emergence. Objective: The objective of this study was to determine the effects of water restriction, salinity, and depth of sowing on the sourgrass germination and emergence processes. Methods: Experiments using sourgrass seeds were conducted under controlled conditions simulating osmotic and saline stress and seeding depths. The data collected was submitted to analysis of variance and adjusted to models by regression analysis. Results: Smaller osmotic potentials reduced germination, normal seedlings, and increased quiescence, with no germination occurring from -0.80 MPa. Salinity caused a decrease in germination from 20 mM NaCl, influencing the percentage of normal and abnormal seedlings and quiescent seeds. Seed depth influenced the emergence of seedlings, with the maximum percentage of emergence (83%) in the seeds placed on the substrate surface. The maximum depth from which sourgrass seedlings emerged was 7.6 cm. Conclusions: The results lead to the conclusion that the sourgrass germination process tolerates low osmotic potentials and salinity levels. Despite being small sized seeds, they can emerge from high depths. These characteristics justify its occurrence in several regions and agroecosystems, especially in perennial and no-till crops lacking soil cover.
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- 2020
6. Busulfan/Sulfolane metabolic ratio on the third day of conditioning may predict the event-free survival in children receiving busulfan based conditioning prior to hematopoietic stem-cell transplantation
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Chakradhara Rao S Uppugunduri, Rezgui, Aziz, Curtis, Patricia Huezo-Diaz, Nava, Tiago, Mlakar, Simona, Theoret, Yves, Bittencourt, Henrique, Krajinovic, Maja, and Ansari, Marc
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metabolic ratio ,efficacy ,HSCT ,busulfan ,Pediatrics ,sulfolane - Abstract
EBMT 2019 meeting abstract : https://www.professionalabstracts.com/ebmt2019/programme-ebmt2019.pdf ESDPPP 2019 meeting abstract; https://adc.bmj.com/content/104/6/e57.2
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- 2019
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7. Allelopathy of Ambrosia artemisiifolia on germination and growth of maize and soybean seedlings
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Formigheiri, Felix B., Bonome, Lisandro T. S., Bittencourt, Henrique von H., Leite, Keidima, Reginatto, Maicon, and Giovanetti, Leonardo K.
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Exudate ,Glycine max L ,invasora ,0211 other engineering and technologies ,phenolic compounds ,02 engineering and technology ,losna-do-campo ,Biology ,Crop ,Dry weight ,Zea mays L ,medicine ,Soybean crop ,Allelopathy ,Aqueous extract ,021110 strategic, defence & security studies ,common ragweed ,fungi ,food and beverages ,04 agricultural and veterinary sciences ,General Medicine ,compostos fenólicos ,Horticulture ,Germination ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,medicine.symptom ,weed - Abstract
In this work, the influence of root exudates and aqueous extract fromAmbrosia artemisiifoliashoots on germination, seed vigor and initial development of corn and soybean were evaluated. Two experiments were carried out in a factorial scheme (2x2), corn and soybean with and without root exudate, and the second in a factorial scheme (2x4), corn and soybean at concentrations of 0, 25, 50 and 75% of aqueous extract ofA. artemisiifoliashoots. The root exudate ofA. artemisiifolianegatively affected the vigor of maize seeds, but not germination. The root exudate ofA. artemisiifoliadid not influence the germination and vigor of soybean seeds. The corn crop was more sensitive than soybean to root exudate. The aqueous extract fromA. artemisiifoliashoots negatively affected the vigor of maize seeds and the vigor and germination of soybean seeds, being the soybean crop more sensitive to the allelopathic effects of the extract. The aqueous extract fromA. artemisiifoliashoots presented total phenol content of 11.13 mg g-1of the dry mass, which can be considered a high value when compared to other weeds., Neste trabalho foi avaliada a influência de exsudados radiculares e de extrato aquoso da parte aérea deAmbrosia artemisiifoliana germinação, no vigor de sementes e no crescimento inicial de milho e soja. Foram realizados dois ensaios, o primeiro em esquema fatorial (2x2), milho e soja com e sem exsudato radicular, e o segundo em esquema fatorial (2x4), milho e soja nas concentrações de 0, 25, 50 e 75 % de extrato aquoso de parte aérea deA. artemisiifolia. O exsudato radicular deA. artemisiifoliaafetou negativamente o vigor de sementes de milho, mas não a germinação. O exsudato radicular deA. artemisiifolianão influenciou a germinação nem o vigor de sementes de soja. A cultura do milho apresentou maior sensibilidade que a soja ao exsudato radicular. O extrato aquoso da parte aérea deA. artemisiifoliaafetou negativamente o vigor de sementes de milho e o vigor e a germinação de sementes de soja, sendo a soja mais sensível aos efeitos alelopáticos do extrato. O extrato aquoso da parte aérea deA. artemisiifoliaapresentou teor de fenóis totais de 11,13 mg g-1de biomassa seca da parte aérea, o que pode ser considerado um valor alto quando comparado ao de outras infestantes.
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- 2019
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8. GERAÇÃO DE ENERGIA ELÉTRICA COM A UTILIZAÇÃO DE BIODIGESTORES DE ESGOTO SANITÁRIO E SEU IMPACTO NA ECONOMIA E NO MEIO AMBIENTE DENTRO DO CONTEXTO DE UMA CIDADE SUSTENTÁVEL
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Álvaro Bittencourt Henrique Silva and Camila Saiki
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Microbiology (medical) ,Immunology ,Immunology and Allergy - Abstract
Esse projeto visou desenvolver a estação de tratamento biológico sanitário de dejetos domésticos para reaproveitamento energético de resíduos de esgoto, com o objetivo de diminuir o impacto ambiental e também gerar biogás e energia elétrica que supram as necessidades de uma cidade sustentável, observando sua demanda, comparando custos de energia elétrica com a implantação do biodigestor e usando apenas a companhia de energia elétrica em Brasília. Num primeiro momento foi feito um estudo teórico acerca dos biodigestores existentes e sua eficiência, por conseguinte foi feito o estudo sobre esgoto e seu impacto nas cidades. O intuito era agregar este projeto com o projeto de pesquisa das alunas da professora Eliete de Pinho Araújo intitulado de "Cidade eficiente e sustentável" que tinha Brasília como seu modelo, porém, seu projeto de pesquisa estava inconcluso, logo, utilizei apenas os dados da ETE (Estação de Tratamento de Efluentes) da cidade de Brasília para este projeto. Técnica e viabilidade de produção sintetizado a partir de resíduos sólidos provenientes das habitações a partir dos dados. Foi feito também um biodigestor teste com os poucos recursos materiais que se foi possível utilizar e muitos dos materiais foram cedidos pelo próprio professor orientador, estudo dos modelos e viabilidade econômica. O estudo, por fim, mostra que o uso de biodigestores é uma possível solução para o problema da destinação dos resíduos sólidos, ao mesmo tempo que produz biogás e energia elétrica, e como que a aplicação do modelo, teoricamente, melhora na economia e qualidade de vida da população
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- 2018
9. CTL019 (tisagenlecleucel): CAR-T therapy for relapsed and refractory B-cell acute lymphoblastic leukemia
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Vairy,Stephanie, Lopes Garcia,Julia, Teira,Pierre, and Bittencourt,Henrique
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Drug Design, Development and Therapy - Abstract
Stephanie Vairy,* Julia Lopes Garcia,* Pierre Teira, Henrique Bittencourt Division of Haematology and Oncology, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, QC, Canada *These authors contributed equally to this work Abstract: Over the past decades, survival of patients with acute lymphoblastic leukemia (ALL) has dramatically improved, but the subgroup of patients with relapsed/refractory ALL still continues to have dismal prognosis. As an emerging therapeutic approach, chimeric antigen receptor-modified T-cells (CAR-T) represent one of the few practice-changing therapies for this subgroup of patients. Originally conceived and built in Philadelphia (University of Pennsylvania), CTL019 or tisagenlecleucel, the first CAR-T approved by the US Food and Drug Administration, showed impressive results in refractory/relapsed ALL since the publication on two pediatric patients in 2013. It is in this context that we provide a review of this product in terms of manufacturing, pharmacology, toxicity, and efficacy studies. Evaluation and management of toxicities, particularly cytokine release syndrome and neurotoxicity, is recognized as an essential part of the patient treatment with broader use of IL-6 receptor inhibitor. An under-assessed aspect, the quality of life of patients entering CAR-T cells treatment, will also be reviewed. By their unique nature, CAR-T cells such as tisagenlecleucel operate in a different way than typical drugs, but also provide unique hope for B-cell malignancies. Keywords: CTL019, tisagenlecleucel, B-cell acute lymphoblastic leukemia
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- 2018
10. Incorporation of GSTA1 genetic variations into a population pharmacokinetic model for IV busulfan in paediatric hematopoietic stem cell transplantation
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Nava, Tiago, Kassir, Nastya, Rezgui, Mohamed Aziz, Uppugunduri, Chakradhara Rao Satyanarayana, Huezo‐Diaz Curtis, Patricia, Duval, Michel, Théoret, Yves, Daudt, Liane E., Litalien, Catherine, Ansari, Marc, Krajinovic, Maja, and Bittencourt, Henrique
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Graft Rejection ,Male ,Transplantation Conditioning ,Busulfan/administration & dosage/pharmacokinetics ,Glutathione Transferase/genetics/metabolism ,Models, Biological ,Polymorphism, Single Nucleotide ,Graft Rejection/immunology/prevention & control ,Models ,Humans ,Population pharmacokinetics ,Precision Medicine ,Hematopoietic Stem Cell Transplantation/adverse effects ,Polymorphism ,Child ,Preschool ,Busulfan ,Children ,Glutathione Transferase ,Transplantation Conditioning/methods ,ddc:618 ,Hematopoietic Stem Cell Transplantation ,Immunosuppressive Agents/administration & dosage/pharmacokinetics ,Stem cell transplantation ,Infant ,Original Articles ,Single Nucleotide ,Precision Medicine/methods ,Biological ,GSTA1 ,Child, Preschool ,Area Under Curve ,Administration ,Feasibility Studies ,Administration, Intravenous ,Female ,Intravenous ,Polymorphisms ,Immunosuppressive Agents - Abstract
AIMS: The aim of this study is to develop a population pharmacokinetic (PopPK) model for intravenous busulfan in children that incorporates variants of GSTA1, gene coding for the main enzyme in busulfan metabolism. METHODS: Busulfan concentration–time data was collected from 112 children and adolescents (median 5.4 years old, range: 0.1–20) who received intravenous busulfan during the conditioning regimen prior to stem cell transplantation. Weight, sex, baseline disease (malignant vs. non‐malignant), age, conditioning regimen and GSTA1 diplotypes were evaluated as covariates of pharmacokinetic parameters by using nonlinear mixed effects analysis. The ability to achieve the target AUC(24h) (3600–6000 μM min(−1)) was assessed by estimating the first dose based on the present PopPK model and by comparing the results with other available models in children. RESULTS: A one‐compartment model with first‐order elimination best described the data. Allometric scaling of weight and a factor of busulfan metabolism maturation were included in the base model. GSTA1 diplotypes were found to be a significant covariate of busulfan clearance, which was 7% faster in rapid metabolizers and 12% slower in poor metabolizers, in comparison with normal ones. Busulfan doses calculated using the parameters of the proposed PopPK model were estimated to achieve the target AUC in 85.2% of the cases (95% CI 78.7–91.7%). CONCLUSION: This is the first PopPK for busulfan that successfully incorporated GSTA1 genotype in a paediatric population. Its use may contribute to better prediction of busulfan exposure in children and adolescents since the first dose, by tailoring the dose according to the individual metabolic capacity.
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- 2018
11. Chemical ecology of Eragrostis plana helps understanding of the species' invasiveness in an agroecosystem community
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Bittencourt, Henrique von Hertwig, Trezzi, Michelangelo Muzell, Teixeira, Sirlei Dias, Bonome, Lisandro da Silva, Vargas, Aline Garcias de [UNESP], Souza Filho, Antonio da Silva, Oldoni, Tatiane Cadorin, Fed Univ Fronteira Sul, Technol Fed Univ Parana, Universidade Estadual Paulista (Unesp), and Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
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forage weed ,rangeland invasion ,alien flora ,alfalfa ,exotic dominance - Abstract
Made available in DSpace on 2019-10-03T18:19:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 Brazilian National Council for Scientific and Technological Development Brazilian Coordination for the Improvement of Higher Education Personnel Federal University of Fronteira Sul Federal Technological University of Parana South African lovegrass (Eragrostis plana Nees) is an aggressive and difficult-to-control species in grazing areas of the south of South America, whose invasion capacity is increased by its phytotoxic capability. The objectives of this work were to identify and quantify chemicals produced by the plant shoots, to evaluate the inhibitory capability of plant extracts on development of lucerne (Medicago sativa L.) and wheat (Triticum aestivum L.), and to determine the spatial distribution of phenolics in rhizosphere soil in an infested field. Extracts were obtained by exhaustive extraction of dry shoot biomass, using solvents in increasing order of polarity. Soil samples contained in the rhizosphere were collected from an infested field. Bioassays for determination of phytotoxicity of extracts on lucerne and wheat seedlings were conducted in a completely randomised design with four replicates. The extracts showed suppressive, stimulating or neutral effects on the development of the radicle, shoots, and total lucerne and wheat seedlings, with greater phytotoxicity, generally, of ethyl acetate and methyl alcohol extracts. In the shoot extracts, nine phenolic compounds were identified and quantified: caffeic acid, coumaric acid, ferulic acid, gallic acid, vanillic acid, catechin, epicatechin, resveratrol, rutin. Of these, four were identified in the soil: catechin, epicatechin, coumaric acid, ferulic acid. Catechin, epicatechin and ferulic acid showed similar distribution patterns in the soil profile, with higher concentrations detected on the surface and on the side opposite the plant crown, which indicates release by the decomposition of tissues deposited on the soil surface. Coumaric acid showed higher concentrations on the surface and in the deeper layer of the soil next to the plant, indicating release both from decomposition of the shoots and from the root system. Future work may explore the phytotoxicity of the analytes identified, either isolated or in admixture, using dose curves and an inhibitory response to target plant species. Fed Univ Fronteira Sul, Dept Agron, BR-85301970 Laranjeiras Do Sul, PR, Brazil Technol Fed Univ Parana, Dept Agron, BR-85503390 Pato Branco, PR, Brazil Technol Fed Univ Parana, Dept Chem, BR-85503390 Pato Branco, PR, Brazil Sao Paulo State Univ, Dept Chem, BR-14800900 Araraquara, SP, Brazil Eastern Amazon Brazilian Agr Res Corp Embrapa, BR-66095903 Belem, Para, Brazil Sao Paulo State Univ, Dept Chem, BR-14800900 Araraquara, SP, Brazil
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- 2018
12. Ecology of germination and allelopathic potential of south african lovegrass (Eragrostis plana Nees)
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Bittencourt, Henrique von Hertwig, Trezzi, Michelangelo Muzell, Teixeira, Sirlei Dias, Souza Filho, Pedro Antonio de, Comin, Jucinei José, and Marchese, José Abramo
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Botanical chemistry ,Herbicidas - Toxicologia ,Plants - Effect of phenols on ,Herbicides - Toxicology ,Fitotecnia ,CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA::MATOLOGIA [CNPQ] ,Ervas daninhas ,Química vegetal ,Weeds ,Plantas - Efeito dos fenóis ,Alelopatia ,Allelopathy - Abstract
A invasibilidade do capim-annoni-2 em agroecossistemas tem sido atribuída as suas características biológicas e relações ecológicas. A ecologia da germinação da espécie e a interação alelopática são pouco compreendidas. Este trabalho objetivou determinar a influência de fatores ambientais na germinação, a fitotoxicidade de extratos de capim-annoni-2, identificar e quantificar aleloquímicos fenólicos presentes em suas frações, determinar a influência da degradação da fitomassa e do solo na fitotoxicidade do extrato aquoso, monitorar a degradação dos compostos presentes nos extratos e identificar e quantificar aleloquímicos no solo de área contaminada. Foram realizados experimentos em laboratório utilizando materiais coletados a campo. As sementes germinaram em temperaturas constantes de 15 até 40 °C, mas as percentagens de germinação foram superiores a 94 % apenas em temperaturas alternadas. A exposição à luz aumentou a frequência de plântulas normais. A germinação aumentou com incremento no potencial de água e o número de plantas normais diminuiu com aumento na concentração de cloreto de sódio. A maior taxa de emergência foi observada com as sementes colocadas na superfície do solo, enquanto que nenhuma emergência ocorreu a 4 cm. Foram identificados e quantificados nove compostos fenólicos com potencial aleloquímico nas frações dos extratos de capim-annoni-2: ácido caféico, ácido cumárico, ácido ferúlico, ácido gálico, ácido vanílico, catequina, epicatequina, resveratrol e rutina. A ordem decrescente de fitotoxicidade geral dos extratos brutos no desenvolvimento de plântulas de trigo e alfafa foi acetato de etila, metanólico, aquoso e hexânico. Foi identificada correlação inversamente proporcional entre concentração de ácido vanílico e comprimento de radícula e total de plântulas de alfafa. A simulação da degradação da fitomassa e do solo ocasionou aumento na fitotoxicidade dos extratos sobre a germinação e o desenvolvimento de plântulas, comprovando a liberação dos aleloquímicos e a influência do solo no aumento de sua fitotoxicidade. Extratos etéreos da fitomassa e do solo incubados apresentaram modificações em seus respectivos cromatogramas do primeiro até o sétimo dia de incubação, enquanto a mistura de fitomassa + solo apresentou maiores modificações apenas entre o primeiro e o terceiro dia de degradação. Foram identificados quatro compostos fenólicos com potencial aleloquímico no solo da área infestada com capim-annoni-2: ácido cumárico, ácido ferúlico, catequina e epicatequina. A concentração destes compostos foi maior na superfície do solo e horizontalmente próximo às plantas de capim-annoni-2, evidenciando associação entre as concentrações dos aleloquímicos com a proximidade da planta. The invasiveness of South African lovegrass in agroecosystems has been attributed to its biological characteristics and the ecological relations. The ecology of species germination and allelopathic interaction are poorly understood. The objective of this work was to determine the influence of environmental factors on germination, phytotoxicity of South African lovegrass extracts, to identify and quantify phenolic allelochemicals present in their fractions, to determine the influence of phytomass and soil degradation on the phytotoxicity of the aqueous extract, to monitor the degradation of the compounds present in the extracts and to identify and quantify allelochemicals in a infested soil. Experiments were carried out in the laboratory using materials collected in the field. Seeds germinated at constant temperatures of 15 to 40 ° C, but the percentages of germination were greater than 94 % only at alternating temperatures. Exposure to light increased the frequency of normal seedlings. Germination increased with increasing water potential and the number of normal plants decreased with increasing sodium chloride concentration. The highest emergence rate was observed with the seeds placed on the soil surface, whereas no emergence occurred at 4 cm. A total of nine phenolic compounds with allelochemical potential were identified in the fractions of extracts of South African lovegrass: caffeic acid, coumaric acid, ferulic acid, gallic acid, vanillic acid, catechin, epicatechin, resveratrol and rutin. The general decreasing order of general phytotoxicity of crude extracts in the development of wheat and alfalfa seedlings was ethyl, methanolic, aqueous and hexane acetate. An inversely proportional correlation was identified between vanillic acid concentration and root and total alfalfa seedlings length. The simulation of phytomass and soil degradation caused an increase in the phytotoxicity of the extracts on germination and seedling development, proving the release of the allelochemicals and the influence of the soil in the increase of its phytotoxicity. The ether extracts of the straw and soil showed changes in their chromatograms from the first to the seventh day of incubation, while the mixture of straw + soil showed greater changes only between the first and third day of degradation. Four phenolic compounds with allelochemical potential were identified in the South African lovegrass infested soil: coumaric acid, ferulic acid, catechin and epicatechin. The concentration of these compounds was higher at the soil surface and horizontally near the South African lovegrass plants, showing an association between concentrations of allelochemicals and plant distance.
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- 2017
13. GSTA1 genetic variants and conditioning regimen : missing key factors in dosing guidelines of busulfan in pediatric hematopoietic stem cell transplantation
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Nava, Tiago Rodrigues, Rezgui, Mohammed Aziz, Uppugunduri, Chakradhara Rao Satyanarayana, Curtis, Patricia Huezo Diaz, Théorêt, Yves, Duval, Michel, Daudt, Liane Esteves, Ansari, Marc A.H., Krajinović, Maja, and Bittencourt, Henrique Neves da Silva
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Bussulfano ,GSTA1 ,Farmacocinética ,Pharmacogenetics ,Farmacogenética ,Dosagem ,Criança ,Pharmacokinetics ,Busulfan ,Dosing guidelines ,Children - Abstract
Busulfan (Bu) is a key component of conditioning regimens used before hematopoietic stem cell transplantation (SCT) in children. Different predictive methods have been used to calculate the first dose of Bu. To evaluate the necessity of further improvements, we retrospectively analyzed the currently available weight- and age-based guidelines to calculate the first doses in 101 children who underwent allogenic SCT in CHU Sainte-Justine, Montreal, after an intravenous Bu-containing conditioning regimen according to genetic and clinical factors. The measured areas under the curve (AUCs) were within target (900 to 1500 µM/min) in 38.7% of patients after the administration of the first dose calculated based on age and weight, as locally recommended. GSTA1 diplotypes linked to poor Bu metabolism (G3) and fludarabine-containing regimens were the only factors associated with AUC within target (OR, 4.7 [95% CI, 1.1 to 19.8, P = .04]; and OR, 9.9 [95% CI, 1.6 to 61.7, P = .01], respectively). From the 11 methods selected for dose calculation, the percentage of AUCs within the target varied between 16% and 74%. In some models G3 was associated with AUCs within the therapeutic and the toxic range, whereas rapid metabolizers (G1) were correlated with subtherapeutic AUCs when different methods were used. These associations were confirmed by clearance-prediction analysis, in which GSTA1 diplotypes consistently influenced the prediction errors of the methods. These findings suggest that these factors should be considered in Bu dose prediction in addition to the anthropometric data from patients. Furthermore, our data indicated that GSTA1 diplotypes was a factor that should be included in future population pharmacokinetic models, including similar conditioning regiments, to improve the prediction of Bu exposure after its initial dose.
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- 2017
14. Impact of CTLA4 genotype and other immune response gene polymorphisms on outcomes after single umbilical cord blood transplantation
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Cunha, Renato, Zago, Marco A, Querol, Sergio, Volt, Fernanda, Ruggeri, Annalisa, Sanz, Guillermo, Pouthier, Fabienne, Kogler, Gesine, Vicario, José L, Bergamaschi, Paola, Saccardi, Riccardo, Lamas, Carmen H, Díaz-de-Heredia, Cristina, Michel, Gerard, Bittencourt, Henrique, Tavella, Marli, Panepucci, Rodrigo A, Fernandes, Francisco, Pavan, Julia, Gluckman, Eliane, Rocha, Vanderson, and Eurocord, Cord Blood Committee Cellular Therapy–Immunobiology Working Party of the European Society for Blood and Marrow Transplantation, Netcord and Faculdade de Medicina de Ribeirão Preto–Faculdade de Medicina de São Paulo, Universidade de São Paulo
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TIRAP ,Male ,Transplantation Conditioning ,Gene Expression ,Biochemistry ,HEMATOLOGIC MALIGNANCIES ,0302 clinical medicine ,HLA Antigens ,VERSUS-HOST-DISEASE ,Genotype ,Protein Isoforms ,CTLA-4 Antigen ,Child ,Immune response gene ,Histocompatibility Testing ,Hematology ,BIOESTATÍSTICA ,Middle Aged ,Fetal Blood ,TNF-ALPHA ,030220 oncology & carcinogenesis ,Cord blood ,Child, Preschool ,Hematologic Neoplasms ,Female ,Cord Blood Stem Cell Transplantation ,Unrelated Donors ,CLINICAL-TRIALS ,Adult ,Adolescent ,Immunology ,NLR Proteins ,Human leukocyte antigen ,Biology ,Disease-Free Survival ,03 medical and health sciences ,Immune system ,Humans ,Alleles ,Adaptor Proteins, Signal Transducing ,Proportional Hazards Models ,Retrospective Studies ,Polymorphism, Genetic ,Umbilical Cord Blood Transplantation ,Infant ,STEM-CELL TRANSPLANTATION ,Cell Biology ,CONSENSUS DEVELOPMENT PROJECT ,Myeloablative Agonists ,BONE-MARROW-TRANSPLANTATION ,Transplantation ,IDENTICAL SIBLING DONORS ,WORKING GROUP-REPORT ,Apoptosis Regulatory Proteins ,030215 immunology - Abstract
We evaluated the impact of recipient and cord blood unit (CBU) genetic polymorphisms related to immune response on outcomes after unrelated cord blood transplantations (CBTs). Pretransplant DNA samples from 696 CBUs with malignant diseases were genotyped for NLRP1, NLRP2, NLRP3, TIRAP/Mal, IL10, REL, TNFRSF1B, andCTLA4. HLA compatibility was 6 of 6 in 10%, 5 of 6 in 39%, and >= 4 of 6 in 51% of transplants. Myeloablative conditioning was used in 80%, and in vivo T-cell depletion in 81%, of cases. The median number of total nucleated cells infused was 3.4 x 10(7)/kg. In multivariable analysis, patients receiving CBUs with GG-CTLA4 genotype had poorer neutrophil recovery (hazard ratio [HR], 1.33; P = .02), increased nonrelapse mortality (NRM) (HR, 1.50; P
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- 2017
15. Association of busulfan exposure with survival and toxicity after haemopoietic cell transplantation in children and young adults: a multicentre, retrospective cohort analysis
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Bartelink, Imke H., Lalmohamed, Arief, van Reij, Elisabeth M L, Dvorak, Christopher C., Savic, Rada M., Zwaveling, Juliette, Bredius, Robbert G M, Egberts, Antoine C G, Bierings, Marc, Kletzel, Morris, Shaw, Peter J., Nath, Christa E., Hempel, George, Ansari, Marc, Krajinovic, Maja, Théorêt, Yves, Duval, Michel, Keizer, Ron J., Bittencourt, Henrique, Hassan, Moustapha, Güngör, Tayfun, Wynn, Robert F., Veys, Paul, Cuvelier, Geoff D E, Marktel, Sarah, Chiesa, Robert, Cowan, Morton J., Slatter, Mary A., Stricherz, Melisa K., Jennissen, Cathryn, Long-Boyle, Janel R., Boelens, Jaap Jan, Sub Pharmacotherapy, Theoretical, Sub Clinical Pharmacy, Pharmacoepi, Pharmacoepidemiology and Clinical Pharmacology, Clinical pharmacology and pharmacy, Sub Pharmacotherapy, Theoretical, Sub Clinical Pharmacy, Pharmacoepi, and Pharmacoepidemiology and Clinical Pharmacology
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Graft Rejection ,Male ,Pediatrics ,Transplantation Conditioning ,Graft vs Host Disease ,Cardiorespiratory Medicine and Haematology ,Cohort Studies ,0302 clinical medicine ,Recurrence ,Child ,Cancer ,ddc:618 ,medicine.diagnostic_test ,Hazard ratio ,Graft Survival ,Area under the curve ,Hematopoietic Stem Cell Transplantation ,Hematology ,Treatment Outcome ,Child, Preschool ,030220 oncology & carcinogenesis ,Area Under Curve ,Female ,Drug ,medicine.drug ,Cohort study ,Homologous ,Adult ,medicine.medical_specialty ,Adolescent ,Clinical Sciences ,Article ,Disease-Free Survival ,Dose-Response Relationship ,Young Adult ,03 medical and health sciences ,Internal medicine ,medicine ,Transplantation, Homologous ,Humans ,Preschool ,Busulfan ,Retrospective Studies ,Transplantation ,Dose-Response Relationship, Drug ,business.industry ,Infant ,Retrospective cohort study ,NONMEM ,Good Health and Well Being ,Therapeutic drug monitoring ,business ,030215 immunology - Abstract
Background Intravenous busulfan combined with therapeutic drug monitoring to guide dosing improves outcomes after allogeneic haemopoietic cell transplantation (HCT). The best method to estimate busulfan exposure and optimum exposure in children or young adults remains unclear. We therefore assessed three approaches to estimate intravenous busulfan exposure (expressed as cumulative area under the curve [AUC]) and associated busulfan AUC with clinical outcomes in children or young adults undergoing allogeneic HCT. Methods In this retrospective analysis, patients from 15 centres in the Netherlands, USA, Canada, Switzerland, UK, Italy, Germany, and Australia who received a busulfan-based conditioning regimen between March 18, 2001, and Feb 12, 2015, were included. Cumulative AUC was calculated by numerical integration using non-linear mixed effect modelling (AUCNONMEM), non-compartmental analysis (AUC from 0 to infinity [AUC0-∞] and to the next dose [AUC0-τ]), and by individual centres using various approaches (AUCcentre). The main outcome of interest was event-free survival. Other outcomes of interest were graft failure or relapse, or both; transplantation-related mortality; acute toxicity (veno-occlusive disease or acute graft versus-host disease [GvHD]); chronic GvHD; overall survival; and chronic-GvHD-free event-free survival. We used propensity-score-adjusted Cox proportional hazard models, Weibull models, and Fine-Gray competing risk regressions for statistical analyses. Findings 790 patients were enrolled, 674 of whom were included: 274 (41%) with malignant and 400 (59%) with non-malignant disease. Median age was 4·5 years (IQR 1·4–10·7). The median busulfan AUCNONMEM was 74·4 mg × h/L (95% CI 31·1–104·6), which correlated with the standardised method AUC0–∞ (r2=0·74), but the latter correlated poorly with AUCcentre (r2=0·35). Estimated 2-year event-free survival was 69·7% (95% CI 66·2–73·0). Event-free survival at 2 years was 77·0% (95% CI 72·1–82·9) in the 257 patients with an optimum intravenous busulfan AUC of 78–101 mg × h/L compared with 66·1% (60·9–71·4) in the 235 patients at the low historical target of 58–86 mg × h/L and 49·5% (29·2–66·0) in the 44 patients with a high (>101 mg × h/L) busulfan AUC (p=0·011). Compared with the low AUC group, graft failure or relapse occurred less frequently in the optimum AUC group (hazard ratio [HR] 0·57, 95% CI 0·39–0·84; p=0·0041). Acute toxicity (HR 1·69, 1·12–2·57; p=0·013) and transplantation-related mortality (2·99, 1·82–4·92; p101 mg × h/L) than in the low AUC group (
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- 2016
16. Association of busulfan exposure with survival and toxicity after haemopoietic cell transplantation in children and young adults: a multicentre, retrospective cohort analysis
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Bartelink, Imke H, Lalmohamed, Arief, van Reij, Elisabeth M L, Dvorak, Christopher C, Savic, Rada M, Zwaveling, Juliette, Bredius, Robbert G M, Egberts, Antoine C G, Bierings, Marc, Kletzel, Morris, Shaw, Peter J, Nath, Christa E, Hempel, George, Ansari, Marc, Krajinovic, Maja, Théorêt, Yves, Duval, Michel, Keizer, Ron J, Bittencourt, Henrique, Hassan, Moustapha, Güngör, Tayfun, Wynn, Robert F, Veys, Paul, Cuvelier, Geoff D E, Marktel, Sarah, Chiesa, Robert, Cowan, Morton J, Slatter, Mary A, Stricherz, Melisa K, Jennissen, Cathryn, et al, and University of Zurich
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10036 Medical Clinic ,2720 Hematology ,610 Medicine & health - Published
- 2016
17. A risk factor analysis of outcomes after unrelated cord blood transplantation for children with Wiskott-Aldrich syndrome
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Shekhovtsova, Zhanna, Bonfim, Carmem M., Ruggeri, Annalisa, Nichele, Samantha, Page, Kristin M., Alseraihy, Amal, Barriga, Francisco, de Toledo Codina, José Sánchez, Veys, Paul, Boelens, Jaap Jan, Mellgren, Karin, Bittencourt, Henrique, O’Brien, Tracey, Shaw, Peter J., Chybicka, Alicja, Volt, Fernanda, Giannotti, Federica, Gluckman, Eliane, Kurtzberg, Joanne, Gennery, Andrew R., Rocha, Vanderson, and Eurocord, Cord Blood Committee of Cellular Therapy and Immunobiology Working Party of the EBMT, Federal University of Parana, Duke University Medical Center and Inborn Errors Working Party of the EBMT
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Male ,medicine.medical_specialty ,Wiskott–Aldrich syndrome ,Graft vs Host Disease ,Cord Blood Stem Cell Transplantation ,macromolecular substances ,Umbilical cord ,Gastroenterology ,Risk Assessment ,Article ,03 medical and health sciences ,0302 clinical medicine ,Cell Therapy & Immunotherapy ,Internal medicine ,hemic and lymphatic diseases ,medicine ,Journal Article ,Humans ,Cumulative incidence ,Risk factor ,Child ,Hematology ,business.industry ,Umbilical Cord Blood Transplantation ,Infant, Newborn ,Infant ,medicine.disease ,Surgery ,Wiskott-Aldrich Syndrome ,Transplantation ,medicine.anatomical_structure ,Treatment Outcome ,030220 oncology & carcinogenesis ,Child, Preschool ,Female ,business ,Unrelated Donors ,030215 immunology - Abstract
Wiskott-Aldrich syndrome is a severe X-linked recessive immune deficiency disorder. A scoring system of Wiskott-Aldrich syndrome severity (0.5-5) distinguishes two phenotypes: X-linked thrombocytopenia and classic Wiskott-Aldrich syndrome. Hematopoietic cell transplantation is curative for Wiskott-Aldrich syndrome; however, the use of unrelated umbilical cord blood transplantation has seldom been described. We analyzed umbilical cord blood transplantation outcomes for 90 patients. The median age at umbilical cord blood transplantation was 1.5 years. Patients were classified according to clinical scores [2 (23%), 3 (30%), 4 (23%) and 5 (19%)]. Most patients underwent HLA-mismatched umbilical cord blood transplantation and myeloablative conditioning with anti-thymocyte globulin. The cumulative incidence of neutrophil recovery at day 60 was 89% and that of grade II-IV acute graft-versus-host disease at day 100 was 38%. The use of methotrexate for graft-versus-host disease prophylaxis delayed engraftment (P=0.02), but decreased acute graft-versus-host disease (P=0.03). At 5 years, overall survival and event-free survival rates were 75% and 70%, respectively. The estimated 5-year event-free survival rates were 83%, 73% and 55% for patients with a clinical score of 2, 4-5 and 3, respectively. In multivariate analysis, age
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- 2016
18. Impact of cord blood banking technologies on clinical outcome: a Eurocord/Cord Blood Committee (CTIWP), European Society for Blood and Marrow Transplantation and NetCord retrospective analysis
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Saccardi, Riccardo, Tucunduva, Luciana, Ruggeri, Annalisa, Ionescu, Irina, Koegler, Gesine, Querol, Sergio, Grazzini, Giuliano, Lecchi, Lucilla, Nanni Costa, Alessandro, Navarrete, Cristina, Pouthiers, Fabienne, Larghero, Jerome, Regan, Donna, Freeman, Taryn, Bittencourt, Henrique, Kenzey, Chantal, Labopin, Myriam, Baudoux, Etienne, Rocha, Vanderson, Gluckman, Eliane, Careggi University Hospital, Eurocord, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut Universitaire d'Hématologie (IUH), Université Paris Diderot - Paris 7 (UPD7)-Université Paris Diderot - Paris 7 (UPD7), Centre de Recherche Saint-Antoine (UMRS893), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Agence de la Biomedicine, Dusseldorf Cord Blood Bank, University of Düsseldorf, Barcelona Cord Blood Bank, Centro Nazionale Sangue, Milano Cord Blood Bank, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Centro Nazionale Trapianti, NHS Cord Blood Bank, Etablissement français du sang [Besançon] (EFS), Paris Cord Blood Bank, Hôpital Saint-Louis, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7), St Louis Cord Blood Bank & Cellular Therapy Laboratory, Sydney Cord Blood Bank, CHU Sainte Justine [Montréal], NetCord Foundation and Liege Cord Blood Bank, Université de Liège, Churchill Hospital [Breast Care Unit], Churchill Hospital Oxford Centre for Haematology, France Monacord, Centre Scientifique de Monaco (CSM), Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], and d'Eggis, Gilles
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[SDV.MHEP.HEM] Life Sciences [q-bio]/Human health and pathology/Hematology ,[SDV.MHEP.HEM]Life Sciences [q-bio]/Human health and pathology/Hematology - Abstract
International audience; BACKGROUNDTechniques for banking cord blood units (CBUs) as source for hematopoietic stem cell transplantation have been developed over the past 20 years, aimed to improve laboratory efficiency without altering the biologic properties of the graft. A large-scale, registry-based assessment of the impact of the banking variables on the clinical outcome is currently missing.STUDY DESIGN AND METHODSA total of 677 single cord blood transplants (CBTs) carried out for acute leukemia in complete remission in centers affiliated with the European Society for Blood and Marrow Transplantation were selected. An extensive set of data concerning CBU banking were collected and correlations with clinical outcome were assessed. Clinical endpoints were transplant-related mortality, engraftment, and graft-versus-host disease (GVHD).RESULTSThe median time between collection and CBT was 4.1 years (range, 0.2-16.3 years). Volume reduction (VR) of CBUs before freezing was performed in 59.2% of available reports; in half of these the frozen volume was less than 30 mL. Cumulative incidences of neutrophil engraftment on Day 60, 100-day acute GVHD (II-IV), and 4-year chronic GVHD were 87, 29, and 21 ± 2%. The cumulative incidence of nonrelapse mortality (NRM) at 100 days and 4-year NRM were, respectively, 16 ± 2 and 30 ± 2%. Neither the variables related to banking procedures nor the interval between collection and CBT influenced the clinical outcome.CONCLUSIONThese findings indicate a satisfactory validation of the techniques associated with CBU VR across the banks. Cell viability assessment varied among the banks, suggesting that efforts to improve the standardization of CBU quality controls are needed.
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- 2016
19. Enhancing crop productivity via weed suppression in organic no-till cropping systems in Santa Catarina, Brazil
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Altieri, Miguel A., Lana, Marcos Alberto, von Hertwig Bittencourt, Henrique, Venturi, Marcelo, dos Santos Kieling, André, Comin, Jucinei José, and Lovato, Paulo Emilio
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Agroecología ,Plantas de cobertura ,Cover crops ,633 - Cultivos y producciones ,Agroecology - Abstract
Agricultores familiares de Santa Catarina, região Sul do Brasil, tên modificado o sistema de plantio direto convencional ao cobrir o solo utilizando diferentes misturas de culturas de cobertura sem uso de herbicidas como estratégia para reduzir a erosão e as flutuações na umidade e temperatura do solo, melhorando assim a qualidade do solo, o controle de plantas espontâneas e o desempenho das culturas. Entre os anos de 2005 e 2008 realizaram-se três experimentos que visaram a compreensão dos processos e dos mecanismos envolvidos no êxito de sistemas agroecológicos de manejo do solo (SAMS), com foco nos fundamentos envolvidos na supressão de plantas espontâneas, uma das principais vantagens dos sistemas agroecológicos de manejo do solo em comparação aos sistemas de plantio direto convencionais. Tanto os resultados obtidos através dos experimentos como das observações dos agricultores sugerem que plantas de cobertura podem melhorar a supressão de plantas espontâneas e consequentemente o rendimento das culturas agrícolas por meio de interferência física, alelopatia e também pelo melhoramento da qualidade dos solos. Os resultados dos experimentos indicam que a melhor mistura de culturas de cobertura deve incluir uma proporção significativa de ervilhaca, centeio e nabo-forrageiro; que estas misturas devem produzir grandes quantidades de biomassa; que sejam facilmente controladas por esmagamento com rolo-faca para formação de espessa cobertura sobre o solo. ABSTRACT Family farmers in Southern Brazil modified the conventional no-till system by flattening cover crop mixtures on the soil surface as strategy to reduce soil erosion and lower fluctuations in soil moisture and temperature, improve soil quality, and enhance weed suppression and crop performance. From 2005 to 2008 three field experiments were done to understand the processes and mechanisms associated in successful organic conservation tillage systems (OCT), especially the underpinnings of ecological weed suppression, a key advantage of OCT systems over conventional no-till systems. The field experiments results as well as farmers observations suggest that cover crops can enhance weed suppression and hence crop yield productivity through physical interference, allelopathy and also a host of effects on soil quality. Results from the trials indicate that: the best cover crops mixture should include a significant proportion of rye, vetch and fodder radish; the mixtures should produce large quantities of biomass; the cover crops and mixtures should be easily suppressed by rolling in order to cover the soil with a thick mulch layer.
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- 2012
20. Acute promyelocytic leukemia presenting as an extradural mass
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Bittencourt,Henrique, Teixeira Junior,Antonio Lucio, Glória,Ana Beatriz Firmato, Ribeiro,Ana Flávia Leonardi Tiburcio, and Fagundes,Evandro Maranhão
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Spinal cord neoplasms ,Sarcoma, myeloid ,Case reports ,hemic and lymphatic diseases ,Leukemia, promyelocytic, acute - Abstract
Acute promyelocytic leukemia is potentially a highly curable type of leukemia that usually presents with pancytopenia, coagulopathies and bleeding. We describe a case of an unusual presentation of acute promyelocytic leukemia. A 53 year-old male was admitted complaining of pain and weakness in his legs. He presented at examination a spastic paraparesis with a sensitive level at the eighth thoracic medullar (T8) segment. Magnetic resonance imaging showed a posterolateral extradural mass from T6 through T8 segments with medullar compression. A complete blood count showed anemia, thrombocytopenia and the presence of promyelocytes and blasts. Marrow examination was compatible with the diagnosis of acute promyelocytic leukemia by cytogenetics and polymerase chain reaction for the PML-RARα gene. He was treated with all-trans-retinoic acid therapy plus daunorubicin and presented an all-trans-retinoic acid syndrome. Despite hematological remission, the patient presented neurologic deterioration and had to be treated with radiotherapy (total dose 3000 cGy) of the extradural lesion. The patient evolved with severe sepsis and died without any recovery from his neurologic deficit. Extramedullary infiltration is a very rare complication in acute promyelocytic leukemia. Most cases are related to relapse after initial treatment with all-trans-retinoic acid. The skin and the central nervous system are the most frequently involved sites. This is possibly the first case reported of this condition in which the patient had a symptomatic extradural mass.
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- 2011
21. Special features of quantification of CD8+CD38+ T-cells by flow cytometry does not represent a good biomarker to monitor the reactivation of cytomegalovirus infection after allogeneic hematopoietic stem cell transplantation
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Lino, Vânia Abadia Soares, Santos, Silvana Maria Eloi, Bittencourt, Henrique Neves da Silva, Silva, Maria Luiza, Spizziri, Tiago, Bretas, Raquel, and Neves, Suzane Pretti Figueiredo
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lcsh:RC633-647.5 ,virus diseases ,Cytomegalovirus ,Original Article ,Antigenemia ,Hematopoietic stem cell transplantation ,lcsh:Diseases of the blood and blood-forming organs ,Flow cytometry ,CD38 ,Antigenemia, CD38 - Abstract
BACKGROUND: Infection/reactivation of cytomegalovirus is a major cause of morbidity and mortality in immunocompromised transplant patients. It has already been observed in kidney and liver transplantation patients that cytomegalovirus disease is accompanied by significant increases in circulating CD8+CD38+ T lymphocytes. There are no reports that study CD8+CD38+ T lymphocytes to monitor/diagnose cytomegalovirus disease in hematopoietic stem cell transplantation patients. OBJECTIVE: The aim of this study was to evaluate some cellular activation markers on circulating mononuclear cells (CD38 and HLA-DR) in patients submitted to hematopoietic stem cell transplantation and to establish any correlation with cytomegalovirus disease as diagnosed by antigenemia. METHODS: Blood samples of 15 transplant patients were analyzed by flow cytometry using anti-CD3, anti-CD4, anti-CD8, anti-CD38, CD16, CD56 and anti-HLA-DR monoclonal antibodies and the results were evaluated in respect to cytomegalovirus antigenemia measured by indirect immunofluorescence. Minitab for Windows was used for statistical analysis and a p-value < 0.05 was considered significant. RESULTS: Patients with positive antigenemia did not show any significant increase in the percentages of cells expressing the CD38 or HLADR activation markers when compared to patients with negative antigenemia. On the contrary, all patients showed high percentages of these cells independent of the presence of cytomegalovirus disease. CONCLUSIONS: This study suggests that the investigation of these lymphocyte sub-populations in patients submitted to hematopoietic stem cell transplantation does not seem to contribute to the early identification of cytomegalovirus disease.
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- 2011
22. Produtividade de feijão-guará e efeito supressivo de culturas de cobertura de inverno em espontâneas de verão - DOI: 10.4025/actasciagron.v31i4.988
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Bittencourt, Henrique Von Hertwig, Lovato, Paulo Emílio, Comin, Jucinei José, Lana, Marcos Alberto, and Altieri, Miguel Angel
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plantio direto ,conservação do solo ,Fitotecnia ,rendimento ,no-tillage ,soil conservation ,plantas espontâneas ,yield ,spontaneous plants - Abstract
The effect of the winter cover crops rye, oat, ryegrass, vetch and fodder radish (and their mixtures) in no-tillage systems was investigated on soil cover, cover crop biomass and summer weed biomass during the critical competition stage with common bean. Bean yield was also evaluated. The experimental design was randomized complete blocks and four repetitions. The highest soil cover during winter was observed in the treatments rye + vetch, rye + vetch + fodder radish and oat + vetch. The highest values of cover crops biomass production were observed in the treatments rye + vetch + fodder radish. Weed suppression was higher in the ryegrass monoculture and in the rye + vetch + fodder radish association, and there was no correlation between cover crop biomass and summer weed suppression; the best bean yields were achieved with the following treatments: ryegrass in monoculture, oat in monoculture and rye + vetch, producing 1,950, 1,730 e 1,790 kg ha-1 respectively. The monocultures of ryegrass and oat showed the lowest costs with seeds and the highest economic returns. Investigou-se o efeito das coberturas de inverno centeio, aveia, azevém, ervilhaca e nabo forrageiro (e suas associações), em sistema de plantio direto, sobre a cobertura do solo e a produção de biomassa das coberturas de inverno, sobre a biomassa de plantas espontâneas de verão, no período crítico de competição, e sobre a produtividade do feijão, cv Guará. O experimento foi instalado em delineamento experimental constituído por blocos ao acaso com quatro repetições. Observaram-se as maiores percentagens de cobertura do solo no inverno, com os tratamentos centeio + ervilhaca, centeio + ervilhaca + nabo forrageiro e aveia + ervilhaca; a produção de biomassa de cobertura foi maior com centeio + ervilhaca + nabo forrageiro. O efeito de supressão observado foi maior no monocultivo de azevém e no consórcio de centeio + ervilhaca + nabo forrageiro, porém não foi detectada correlação da biomassa de cobertura com a supressão de plantas espontâneas de verão. Os melhores rendimentos de feijão foram obtidos com o monocultivo de azevém, monocultivo de aveia e combinação centeio + ervilhaca, que atingiram 1.950, 1.730 e 1.790 kg há-1, respectivamente. O azevém e a aveia em monocultivo apresentaram os menores custos com sementes e as maiores receitas, ou seja, os maiores retornos por unidade monetária investida.
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- 2009
23. Association between oral HSV-1 and survival in allogeneic hematopoietic stem cell transplanted patients
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Guimaraes, Andre Luiz Sena, Gomes, Carolina Cavalieri, Marques-Silva, Luciano, Correira Silva, Jeane de Fátima Silva, Victoria, Junia Maria Neto, Gomez, Ricardo Santiago, and Bittencourt, Henrique
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surgical procedures, operative ,immune system diseases ,UNESCO::CIENCIAS MÉDICAS ,CIENCIAS MÉDICAS [UNESCO] - Abstract
Introduction: This study was designed to investigate the effect of oral HSV-1 shedding on the survival of allogeneic hematopoietic stem cell transplanted (allo-HSCT) patients. Methods: One hundred nineteen allo-HSCT patients were included in the study and divided in three groups: before transplant, 100 days after transplant and 1 year of allo-HSCT. Healthy volunteers matched by age and gender were also selected. Oral swabs were performed and the nested PCR was used to detect HSV-1 presence in the oral mucosa. In statistical analysis, chi-square test was used to test the distribution of HSV1 shedding among the three groups. Time to death after allo-HSCT was displayed by means of the Kaplan-Meier method and the results were compared by the log-rank test. Cox proportional hazards multivariate model was used to evaluate the survival. Results: We observed that HSV-1 shedding was similar at different points after allo-HSCT. However, HSV-1 shedding before allo-HSCT was associated with worst survival rates after allo-HSCT in multivariate analysis. Conclusion: Our data demonstrates that HSV-1 shedding in oral mucosa before transplant is associated with worst survival rate of allo-HSCT patients.
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- 2009
24. Culturas de cobertura de inverno na implantação de sistema de plantio direto sem uso de herbicidas
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Bittencourt, Henrique von Hertwig, Universidade Federal de Santa Catarina, and Lovato, Paulo Emilio
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Agroecossistemas ,Agricultura ,Ecologia agricola ,Plantio direto - Abstract
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias. Programa de Pós-Graduação em Agroecossistemas Este trabalho tem o objetivo de apresentar os resultados de uma pesquisa destinada a identificar a capacidade supressiva das culturas de cobertura de inverno utilizadas por agricultores familiares e recomendadas por técnicos e pesquisadores sobre as plantas espontâneas de verão e o efeito da fitomassa das culturas de cobertura no rendimento da cultura de feijão. Investigou-se o efeito das culturas de cobertura de inverno com centeio (Secale cereale), aveia preta (Avena strigosa), azevém (Lolium multiflorum), ervilhaca (Vicia sativa) e nabo forrageiro (Raphanus sativus), assim como algumas associações, em sistema de plantio direto na porcentagem de cobertura do solo, na produção de fitomassa das coberturas de inverno, na produção de fitomassa de plantas espontâneas de verão no período crítico de competição com o feijão e no rendimento de grãos da cultura do feijão. Instalou-se o experimento na estação experimental da EPAGRI de Campos Novos (940 m de altitude) com delineamento experimental constituído por blocos ao acaso com quatro repetições e nove tratamentos. Observaram-se as maiores percentagens de cobertura do solo no inverno com os tratamentos centeio + ervilhaca, centeio + ervilhaca + nabo forrageiro e aveia + ervilhaca enquanto a produção de fitomassa de cobertura foi maior com centeio + ervilhaca + nabo forrageiro. As espécies de espontâneas que mais produziram fitomassa foram, em ordem crescente, capim-papuã (Brachiaria plantaginea), corda-de-viola (Ipomoea grandifolia), picão-preto (Bidens pilosa) e leiteiro (Euphorbia heterophylla). Não foi detectada correlação da fitomassa de cobertura com a supressão de plantas espontâneas de verão; o efeito de supressão foi maior no monocultivo de azevém e no consórcio de centeio + ervilhaca + nabo forrageiro. Os melhores rendimentos de feijão foram obtidos com azevém, aveia e centeio + ervilhaca, que atingiram 1,95, 1,73 e 1,79 Mg ha-1 respectivamente. O azevém e a aveia apresentaram os menores custos com sementes e as maiores receitas, ou seja, os maiores retornos por unidade monetária investida.
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- 2008
25. Autologous hematopoetic stem cell transplantation for HIV-related Non-Hodgkin's Lymphomas (NHL)
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Bittencourt,Henrique
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- 2005
26. Thalidomide and multiple myeloma : therapy evaluation using clinical and laboratorial parameters
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Bittencourt, Rosane Isabel, Almeida, Andréia Dias, Bittencourt, Henrique Neves da Silva, Onsten, Tor Gunnar Hugo, Fernandes, Flavo Beno, Friederish, João Ricardo, Fogliatto, Laura Maria, Astigarraga, Claudia Caceres, Paz, Alessandra Aparecida, and Silla, Lucia Mariano da Rocha
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Mieloma múltiplo ,Inibidores da angiogênese ,Anti-angiogenesis ,Talidomida ,Multiple myeloma ,Thalidomide - Abstract
Nas duas últimas décadas, houve uma mudança radical na terapia e na evolução do mieloma múltiplo(MM), neoplasia hematológica ainda considerada fatal. As pesquisas e investimentos em medicamentos que interferem com a fisiopatogenia e com o microambiente medular estão permitindo o controle e a regressão do clone plasmocitário maligno, mudando as perspectivas da doença. A idéia nova de usar uma droga velha, a talidomida, tem-se mostrado efetiva no MM. Em 1997, apostando nos efeitos imunomoduladores e antiangiogênicos da talidomida, foram iniciados ensaios clínicos para MM refratários. A partir daí, outras ações sobre o plasmócito e microambiente medular foram eficazes contra a doença, não somente em refratários ou recaídos, mas também como terapia de indução e/ou de manutenção da remissão. No Serviço de Hematologia do Hospital de Clínicas de Porto Alegre foram acompanhados 35 portadores de mieloma múltiplo, em uso de doses baixas (100 mg) de talidomida, pelas indicações: 13 – manutenção pós-TMO, 11 – pós-indução, 5 – recaída, 4 – refratariedade e 2 – terapia de indução. O estudo vigorou entre março/01 a dez/03. Os parâmetros avaliados foram: nível Hb, pico da imunoglobulina sérica ou urinária e o número de plasmócitos na medula óssea. As medidas foram tomadas pré-talidomida e após 3, 6 e 12 meses. A taxa de imunoglobulina foi o padrão ouro para avaliação de resposta. Os resultados: a dose terapêutica tolerada em 48% dos pacientes foi 100 mg; 65% dos tratados para induzir remissão (11 pacientes) apresentaram melhora entre 25%-50% no nível da imunoglobulina sérica; 87,5% daqueles que usaram para manutenção de remissão (13 pós-TMO/ 11 pós-indução) mantiveram o mesmo plateau inicial. Over the last two decades, we have seen a radical change in therapy and progression of multiple myeloma, a malignant hematologic disease that is still considered fatal. Recent investment and research on mechanisms that interfere in the physiopathogenesis and bone marrow microenvironment are turning control and regression of the malignant plasma cell clone into something achievable, which may change expectations related to this disease. The new idea of using an old drug, thalidomide, has shown to be effective in multiple myeloma. In 1997, using the known effects of immunomodulation and antiangiogenesis of this drug, clinical trials were started in patients with unresponsive disease. Other therapeutic interventions in the bone marrow microenvironment and plasma cells have been added and proved to be efficacious, not only as a therapy for refractory patients, but also for induction and/or remission maintenance therapy. Thirty-five patients with multiple myeloma were treated with low-dose thalidomide (100 mg) and followed up. Thirteen were on maintenance therapy after bone marrow transplantation, eleven started thalidomide after induction therapy, five after relapse, four were refractory to usual therapies and two had induction therapy with thalidomide. The study took place in the Hematology and Bone Marrow Transplantation service of the Hospital de Clínicas de Porto Alegre, from March 2001 to December 2003. Hemoglobin levels, serum or urine immunoglobulin peaks and bone marrow plasma cell counts were evaluated. These parameters were assessed before starting with the drug and after 3.6 and 12 months of usage. The immunoglobulin level was considered the gold standard to evaluate the response. The results showed that 100 mg was the tolerable dose for 51% of the patients. Sixty-five percent of those who used thalidomide for induction therapy showed a 25 to 50% improvement in immunoglobulin serum levels and 90% of the patients on maintenance therapy (13 after bone marrow transplantation, 11 after induction), sustained the same immunoglobulin levels of the initial plateau.
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- 2004
27. Leucemia Mielóide Agura: perfil de duas décadas do Serviço de Hematologia do Hospital das Clínicas de Porto Alegre - RS
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Bittencourt, Rosane, Fogliato, Laura, Daudt, Liane, Bittencourt, Henrique N. S., Friederich, João R., Fernandes, Flavo, Onsten, Tor, Fassina, Kátia, Rocha, Luis K. da, Moreno, Fábio, Silva, Geórgia, Cruz, Matheus S., Garcia, Régis G. de, Wasnievski, João C., and Silla, Lúcia M. R.
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taxa de remissão ,Acute Myeloid Leukemia ,remission rates ,overall survival ,sobrevida livre de doença ,Leucemia Mielóide Aguda ,disease free survival ,sobrevida global - Abstract
Nos últimos vinte anos, nosso serviço recebeu os pacientes com a suspeita de Leucemia Mielóide Aguda (LMA) provenientes de todas as regiões do estado. Entre março de 1980 e dezembro de 1999 analisamos 195 pacientes com idades superior a 12 e inferior a 70 anos, apresentando LMA "de novo" excetuando o subtipo M3. Na década de 80 foram registrados 102 pacientes: 47 homens e 55 mulheres. Destes, 84 receberam quimioterapia de indução com Citarabina e Daunorrubicina (esquema "7+3"), resultando no índice de remissão de 51% (43/84). As médias de sobrevidas livre de doença e global foram dez meses em 35% e 12 meses em 13% respectivamente. De jan/90 a dez/93 houve 41 novos diagnósticos e todos foram submetidos à quimioterapia com esquema "7+3" atingindo a taxa de 66% de remissão. As sobrevidas livre de doença e global foram estatisticamente (p
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- 2003
28. Acute myelogenous leukemia : two decades overview - hematology service Hospital de Clínicas de Porto Alegre
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Bittencourt, Rosane Isabel, Fogliatto, Laura Maria, Daudt, Liane Esteves, Bittencourt, Henrique Neves da Silva, Friedrisch, Joao Ricardo, Fernandes, Flavo Beno, Silla, Lucia Mariano da Rocha, Onsten, Tor Gunnar Hugo, Fassina, Katia Zanotelli, Wasnievski, João C., Rocha, Luis, Moreno, Fábio de Lima, Garcia, Regis Garcia de, Silva, Georgia Regina S. da, and Cruz, Matheus Silvestri
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Acute Myeloid Leukemia ,Remissão induzida ,Protocolos de quimioterapia combinada ,Hospital de Clínicas de Porto Alegre. Serviço de Hematologia ,Remission rates ,Overall survival ,Quimioterapia [Leucemia mielocítica aguda] ,Sobrevivência livre de doença ,Disease free survival ,Estudos retrospectivos ,Taxa de sobrevida - Abstract
Nos últimos vinte anos, nosso serviço recebeu os pacientes com a suspeita de Leucemia Mielóide Aguda (LMA) provenientes de todas as regiões do estado. Entre março de 1980 e dezembro de 1999 analisamos 195 pacientes com idades superior a 12 e inferior a 70 anos, apresentando LMA “de novo” excetuando o subtipo M3. Na década de 80 foram registrados 102 pacientes: 47 homens e 55 mulheres. Destes, 84 receberam quimioterapia de indução com Citarabina e Daunorrubicina (esquema “7+3”), resultando no índice de remissão de 51% (43/84). As médias de sobrevidas livre de doença e global foram dez meses em 35% e 12 meses em 13% respectivamente. De jan/90 a dez/93 houve 41 novos diagnósticos e todos foram submetidos à quimioterapia com esquema “7+3” atingindo a taxa de 66% de remissão. As sobrevidas livre de doença e global foram estatisticamente (p
- Published
- 2003
29. Associação da dose de células CD34 com recuperação hematopoética, infecções e outros desfechos após transplante alogênico de medula óssea de doador familiar HLA-idêntico
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Bittencourt, Henrique Neves da Silva and Fuchs, Flávio Danni
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Resultado do tratamento ,Transplante de medula óssea ,Coeficiente de mortalidade ,Prognóstico ,Histocompatibilidade ,Transplante homólogo ,Transplante de células-tronco hematopoéticas ,Contagem de células - Abstract
Resumo não disponível.
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- 2002
30. Uso de fatores de crescimento hematopoieticos em pacientes portadores de leucemias agudas, recaidas ou refratarias submetidos a quimioterapia de altas doses
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Bittencourt, Henrique Neves da Silva and Fuchs, Flávio Danni
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Efeitos adversos [Quimioterapia] ,Etiologia [Neutropenia] ,Complicações [Leucemia] ,Hematínicos - Abstract
MARCO TEÓRICO A neutropenia é freqüente nos pacientes submetidos a quimioterapia e predispõe a um aumento na incidência de episódios infecciosos. A duração e intensidade do período de neutropenia estão diretamente relacionados à intensidade da quimioterapia administrada. A disponibilidade dos fatores de crescimento hematopoiéticos da linhagem mielóide, G-CSF e GM-CSF, constituíram-se em nova abordagem para reduzir o período de neutropenia e, presumivelmente, as complicações infecciosas. Não há consenso sobre a real utilidade do emprego de fatores de crescimento como terapia ad.iuvante em pacientes com leucemias agudas. Ensaios clínicos envolvendo leucemias agudas recaídas ou refratárias são raros e mostraram resultados similares aos obtidos nas leucemias agudas "de novo", ou seja, redução no período de neutropenia sem repercussão na taxa de óbito ou remissão. OBJETIVOS Principal: avaliar o efeito dos fa tores de crescimento sobre a mortalidade hospitalar dos portadores de leucemias agudas recaídas ou refratárias submetidos a quimioterapia ele alta- dose. Secundários: avaliar o impacto do uso destes fatores sobre o gasto com antibióticos, dias ele neutmpenia, dias de internação, dias de febre, incidência de infecções e taxa de remissão. CONCLUSÃO O emprego de fatores de crescimento, em pacientes com leucemia aguda recaída atendidos na clínica hematológica do Hospital de Clínicas de Porto Alegre, não modificou a taxa de mortalidade, a freqüência de remissão e outros parâmetros clínicos de interesse. BACKGROUND Neutropenia is a common feature in patients treated with chemotherapy and is associated with an increased incidence of infections. The duration and intensity of neutropenia are mainly determin ated by the intensity of the chemotherapy regimen. Availability of recombinant myeloid growth factors (G-CSF and GM-CSF) brought up a new approach to reduce the duration of neutropenia and presumably, the incidence of infections. There i no consensus on the value of use of growth factors as adjuvant therapy in patients with acute leukemias. There is a few clinicai trials with patients 1..vith relapsed acute leukemias, and despire showing a reduction in the duration of neutropenia, they do not show reduction in the death or remission rates. ÜBJECTIVES Principal: to evaluate the effect of growth factors in the mortaliry rate of patients treatt!d with high-dose chemotherapy for relapsed acute leukemia. Secondary: to evaluate the effect of use of hematopoietic growth factors on the costs of antibiotic use, days of neutropenia, fever, lenght of hospitali:ation, and remission rares. CONCLUSION The use of hematopoietic growth factors in patients with relapsed acute leukenúa treated in the hematological clliúcs of the Hospital de Clfnicas de Porto Alegre did not modify the mortality rate, frequency of renússion and other clinicai parameters.
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- 1998
31. Estudo retrospectivo do tratamento de leucemia mielóide aguda com o transplante de medula óssea : a experiência brasileira ; Retrospective study of stem cell transplantation for acute myeloid leukemia (AML) : the Brazilian experience
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Hamerschlak, Nelson, Barton, Débora, Pasquini, Ricardo, Sarquis, Yana N., Ferreira, Euripedes, Moreira, Frederico R., Colturato, Vergilio Antonio Renzi, Souza, Cármino Antônio, Voltarelli, Júlio Cesar, Piron-Ruiz, Lilian, Setubal, Daniela, Zanichelli, Maria Aparecida, Claudio Castro, Bueno, Nadjanara D., Seber, Adriana, Rotolo, Marco A., Silla, Lucia Mariano Da Rocha, Bittencourt, Henrique Neves Da Silva, Souza, Mair Pedro, Vigorito, Afonso Celso, Brandalise, Sílvia R., Maiolino, Angelo, Nucci, Márcio, Coelho, Erika, Ostronoff, Maurício, Simões, Belinda Pinto, and Ruiz, Milton Artur
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Leucemia mielóide aguda ,Acute myeloid leukemia ,treatment ,lcsh:RC633-647.5 ,bone marrow transplantation ,lcsh:Diseases of the blood and blood-forming organs ,tratamento ,transplante de medula óssea - Abstract
Dados do Registro Internacional de Transplante de Medula Óssea, International Bone Marrow Transplant Registry (IBMTR) contribuem para o progresso do transplante de medula óssea (TMO) em todo o mundo. Neste artigo relatamos a experiência brasileira em leucemia mielóide aguda e comparamos os resultados do TMO com os dados internacionais. Foi realizado um estudo retrospectivo com dados de tratamento de LMA com o TMO de 16 instituições brasileiras. A análise estatística dos transplantes da modalidade autogênica (TMO auto) e alogênica (TMO alo) foi realizada com o método de Kaplan-Meier e log-rank. Todos os valores de p foram bicaudados. Foram avaliados os dados de 731 pacientes (205 TMO auto e 526 TMO alo). A mediana de sobrevida global dos pacientes submetidos ao TMO auto foi superior à dos submetidos ao TMO alo (1.035 vs 466 dias, p=0,0012). A origem das células-tronco (OCT) no TMO alo em 73% dos pacientes foi de medula óssea (CTMO), em 23% de sangue periférico (CTSP) e em 4% de cordão umbilical. No TMO auto, a OCT foi 63% de CTSP, 22% CTMO e 15% de ambas as fontes. A OCT não teve impacto na sobrevida global (SG). Não houve diferença na SG também entre os pacientes segundo a classificação FAB no TMO alo, mas os pacientes com LMA M3 com o TMO auto tiveram SG longa. Como esperado, a principal causa de óbito entre os pacientes do TMO auto foi relacionada à recidiva de doença (60%), enquanto no TMO alo as principais causas foram a doença enxerto versus hospedeiro e infecções (38%). Em ambos os grupos foi observada SG mais longa nos pacientes tratados em primeira remissão completa (1RC) quando comparados aos de segunda remissão (2RC) e outras fases (pData from the International Bone Marrow Transplant Registry (IBMTR) contribute for the improvement of Bone Marrow Transplant (BMT) worldwide. We studied the Brazilian experience in BMT for AML to compare this with international data. We performed a retrospective study by sending questionnaires to 16 BMT centers regarding clinical and treatment variables. Statistical analyses concerning autologous BMT (autoBMT) and allogeneic BMT (alloBMT) were performed using the Kaplan-Meier method and the log-rank test. All p-values were two-tailed. We collected data from 731 patients (205 autoBMT and 526 alloBMT). Median overall survival (OS) for autoBMT patients was longer than alloBMT patients (1035 vs. 466 days, p=0.0012). AlloBMT stem cell source (SCS): 73% bone marrow stem cell (BMSC), 23% peripheral blood stem cells (PBSC) and 4% umbilical cord blood. Among the autoBMT patients, the SCS was 63% PBSC, 22% BMSC and 15% both. The SCS did not impact on OS. There was no difference in OS between different FAB classifications in the alloBMT group, but in the autoBMT the M3 patients had longer survival. As expected, the main cause of mortality among autoBMT patients was related to disease relapse (60%), while in the alloBMT, to infection (38%). In both groups we found longer OS in first complete remission (1CR) compared to second (2CR) and other (p
32. Tolerance of bean cultivars (Phaseolus vulgaris L.) to protoporphyrinogen oxidase inhibitory herbicides
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Brusamarello, Antonio Pedro, Trezzi, Michelangelo Muzell, Finatto, Taciane, Oliveira, Paulo Henrique de, Nunes, Anderson Luis, Xavier, Elouize, Bittencourt, Henrique Von Hertwig, and Moraes, Pedro Valerio Dutra De
- Subjects
Ervas daninhas - Controle ,Feijão-comum ,Herbicides ,Herbicida ,CIENCIAS AGRARIAS::AGRONOMIA [CNPQ] ,Weeds - Control ,Common bean ,Engenharia/Tecnologia/Gestão - Abstract
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Para a cultura do feijão existem poucos herbicidas registrados que exercem seletividade à cultura e sejam eficientes no controle de espécies daninhas de folhas largas. Um dos fatores que contribui para a escassez de herbicidas registrados é a elevada sensibilidade do feijão aos mesmos. Isso ressalta a grande importância de pesquisas investigando a tolerância do feijão a herbicidas que ainda não possuem registro à cultura, como novas alternativas para o controle das plantas daninhas. Estudos recentes comprovaram a existência de variabilidade de tolerância de cultivares feijão ao herbicida saflufenacil, inibidor da enzima protoporfirinogênio oxidase (Protox), quando aplicado na modalidade de pré-emergência da cultura. O presente trabalho teve por objetivo investigar a tolerância do feijão aos herbicidas inibidores da Protox. Os experimentos foram executados para determinar: (1) a tolerância diferencial do herbicida safluenacil nas modalidades de pré e pós-emergência; (2) a existência de níveis diferenciados de tolerância entre cultivares de feijão; (3) a tolerância a herbicidas de diferentes grupos químicos inibidores da Protox; (4) a seletividade de diferentes doses de saflufenacil e sulfentrazone em em cultivares de feijão e o efeito no controle de plantas daninhas; e (5) mecanismos de tolerância baseados na metabolização dos herbicidas. Os resultados permitem inferir que os níveis de tolerância do feijoeiro ao saflufenacil são muito superiores na modalidade de pré-emergência, em relação à pós-emergência, em que doses muito reduzidas de saflufenacil causam a morte das plantas. Dentre as cultivares testadas, a BRSMG Talismã e a IAC Milênio apresentaram, respectivamente, a maior e menor tolerância ao saflufenacil (20,5 g ha-1). A tolerância aos herbicidas saflufenacil, sulfentrazone, flumioxazin e fomesafen aplicados em pré-emergência depende da cultivar e da dose utilizada, não havendo um padrão de tolerância cruzada aos inibidores da Protox nas cultivares. Em condições de campo, saflufenacil apresentou controle satisfatório das plantas daninhas apenas na dose de 52,5 g ha-1, a qual causou elevada fitotoxicidade para o feijão. Sulfentrazone (400 g ha-1) apresentou nível satisfatório de controle das plantas daninhas e seletividade para as cultivares BRSMG Talismã e IPR Tuiuiú, demonstrando bom potencial para ser empregado em pré-emergência em solo do tipo latossolo. Em ensaios em casa-de-vegetação, o aumento da tolerância da cultivar sensível com uso do protetor mefenpyr-diethyl e a redução da tolerância da cultivar tolerante com o inibidor clorpirifós, sugerem que a metabolização está envolvida no mecanismo de tolerância aos inibidores da Protox. Conclui-se que o nível de tolerância manifestada em pré-emergência é dependente da cultivar e do herbicida empregado, sugerindo o envolvimento da metabolização do herbicida como um dos mecanismos de tolerância do feijão aos inibidores da enzima Protox. For bean crop there are few registered herbicides that exert crop selectivity and are efficient in controlling broadleaf weeds. This underscores the great importance of research investigating the tolerance of the bean to herbicides that do not yet have a record to the crop, as new alternatives for the control of weeds. Recent studies have confirmed the existence of variability of tolerance of bean cultivars to saflufenacil herbicide, inhibitor of the protoporphyrinogen oxidase (Protox) enzyme, when applied in the pre-emergence mode of the culture. The present work aimed to investigate the tolerance of beans to herbicides inhibitors of Protox enzyme. The experiments were performed to determine: (1) the differential tolerance of safluenacil herbicide in pre and post emergence modalities; (2) the existence of different tolerance levels among bean cultivars; (3) herbicide tolerance of different Protox inhibitor chemical groups; (4) the selectivity of different doses of saflufenacil and sulfentrazone in bean cultivars and the effect on weed control; and (5) tolerance mechanisms based on herbicide metabolism. The results allow us to infer that the bean tolerance levels to saflufenacil are much higher in the preemergence modality than the postemergence, in which very low doses of saflufenacil cause plant death. Among the cultivars tested, BRSMG Talismã and IAC Milênio presented, respectively, the highest and lowest tolerance to saflufenacil (20.5 g ha-1). The tolerance to the saflufenacil, sulfentrazone, flumioxazin and fomesafen herbicides applied in pre-emergence depends on the cultivar and dose used, and there is no cross tolerance pattern to Protox inhibitors in the cultivars. In field conditions, saflufenacil presented satisfactory control of weeds only at the dose of 52.5 g ha-1, which caused high phytotoxicity to the bean. Sulfentrazone (400 g ha-1) showed satisfactory level of weed control and selectivity for the cultivars BRSMG Talismã and IPR Tuiuiú, showing good potential to be used in pre-emergence on latosol type soil. In greenhouse trials, increased tolerance of the sensitive cultivar with mefenpyr-diethyl protector and the reduction of tolerance of the tolerant cultivar to the chlorpyrifos inhibitor, suggest that the metabolism is involved in the mechanism of tolerance to Protox inhibitors. It is concluded that the tolerance level manifested in pre-emergence is dependent on the cultivar and herbicide employed, suggesting the involvement of herbicide metabolism as one of the mechanisms of bean tolerance to Protox enzyme inhibitors.
- Published
- 2019
33. Perdas de água nos sistemas de abastecimento do Distrito Federal entre os anos de 2007 e 2016
- Author
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Santana, Márcio Silva and Silva, Álvaro Bittencourt Henrique
- Subjects
Sistema Nacional de Informações sobre Saneamento - SNIS ,Engenharia civil ,Sistemas de abastecimento ,Perdas de água ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] - Abstract
Submitted by Franciene Aguiar (franciene.aguiar@ucb.br) on 2019-02-28T19:58:43Z No. of bitstreams: 1 MarcioSilvaSantanaTCCGraduacao2018.pdf: 933618 bytes, checksum: 08a1a5de03137a44a5b11df6f2efbd44 (MD5) Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2019-03-18T14:06:10Z (GMT) No. of bitstreams: 1 MarcioSilvaSantanaTCCGraduacao2018.pdf: 933618 bytes, checksum: 08a1a5de03137a44a5b11df6f2efbd44 (MD5) Made available in DSpace on 2019-03-18T14:06:10Z (GMT). No. of bitstreams: 1 MarcioSilvaSantanaTCCGraduacao2018.pdf: 933618 bytes, checksum: 08a1a5de03137a44a5b11df6f2efbd44 (MD5) Previous issue date: 2018 Perdas de água nos sistemas de abastecimento geram impactos financeiros e ambientais, e colaboram para a redução dos índices de reservação de água. Faz-se necessário buscar alternativas para amenizar esses impactos, uma delas é avaliar as perdas de água que ocorrem nos sistemas de abastecimento estaduais. Este estudo, portanto, realiza uma pesquisa exploratória documental para avaliar as perdas de água que ocorreram nos sistemas de abastecimento do Distrito Federal entre os anos de 2007 a 2016, por meio do Aplicativo da Série Histórica do Sistema Nacional de Informações sobre Saneamento (SNIS) e de dados fornecidos pela Companhia de Saneamento Ambiental do Distrito Federal (CAESB). Diante disso, verificou-se que, no período avaliado, o DF perdeu aproximadamente 677,1 milhões de m³ de água, consequentemente a CAESB deixou de arrecadar quase 2,4 bilhões de reais, com isso a companhia deixa de investir em outros setores, pois com o aumento da população, se faz necessária a ampliação da oferta hídrica. Altos indicadores impõe a constatação de que a Companhia ainda tem muito que fazer para reduzir esses indicadores, pois mesmo estando entre as companhias com os menores indicadores do país, esses valores ainda são considerados altos.
- Published
- 2018
34. Potencial alelopático de plantas de adubação verde sobre a Cultura do milho e plantas espontâneas
- Author
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Reginatto, Maicon, Bonome, Lisandro Tomas da Silva, and Bittencourt, Henrique von Hertwig
- Subjects
Adubação ,Conservação do solo ,Insumos agrícolas - Abstract
Submitted by Diego dos Santos Borba (dborba@uffs.edu.br) on 2018-10-01T14:36:24Z No. of bitstreams: 1 REGINATTO.pdf: 8327316 bytes, checksum: 237bb49cb45eb09f4a25439358154f9c (MD5) Approved for entry into archive by Diego dos Santos Borba (dborba@uffs.edu.br) on 2018-10-01T14:37:33Z (GMT) No. of bitstreams: 1 REGINATTO.pdf: 8327316 bytes, checksum: 237bb49cb45eb09f4a25439358154f9c (MD5) Made available in DSpace on 2018-10-01T14:37:33Z (GMT). No. of bitstreams: 1 REGINATTO.pdf: 8327316 bytes, checksum: 237bb49cb45eb09f4a25439358154f9c (MD5) Previous issue date: 2018 O uso de plantas de adubação verde tem sido uma estratégia para os agricultores para reduzir a utilização de insumos químicos sintéticos. Este trabalho objetivou avaliar o potencial alelopático de plantas de adubação verde nabo forrageiro, aveia preta e ervilhaca peluda sobre a cultura do milho e das plantas espontâneas Amaranthus spinosus e Ipomoea grandifolia. O trabalho foi dividido em três experimentos. No primeiro avaliou-se o potencial alelopático do exsudato radicular de plantas de adubação verde sobre a germinação e crescimento de plantas espontâneas e do milho. As avaliações realizadas foram: germinação, Índice de Velocidade de Germinação (IVG), crescimento e peso da matéria seca da raiz e da parte aérea do milho, germinação, IVG e crescimento do A. spinosus, protrusão radicular, Índice de Velocidade de Protrusão Radicular (IVPR) e crescimento da I. grandifolia. No segundo experimento avaliou-se o potencial alelopático do extrato aquoso da parte aérea de plantas de adubação verde na germinação e crescimento de plantas espontâneas e do milho. Para isso, as análises realizadas foram as mesmas do primeiro experimento. O terceiro experimento objetivou avaliar o potencial alelopático da degradação da palhada de plantas de adubação verde na emergência e no desenvolvimento inicial do milho, com as seguintes análises: porcentagem de emergência, Índice de Velocidade de Emergência (IVE), clorofila a, b e Total, área foliar e peso da matéria seca das plântulas de milho. Foram realizados bioensaios em laboratório para avaliar a fitotoxicidade do exsudato de raiz e do extrato aquoso, e bioensaio em casa de vegetação para avaliar a fitotoxicidade da degradação da palhada. O exsudato radicular da aveia preta foi o que apresentou maior fitotoxicidade ao desenvolvimento inicial das plântulas de milho e plantas espontâneas, seguida pelo exsudato radicular da ervilhaca peluda que também apresentou fitotoxicidade ao milho e às plantas espontâneas. O extrato aquoso que mais afetou o vigor e a germinação do milho foi o de ervilhaca peluda, seguido pela aveia preta e nabo forrageiro. Concentrações baixas dos extratos aquosos são menos fitotóxicas ao desenvolvimento inicial do milho, sendo que as plantas espontâneas apresentam maior sensibilidade. A ervilhaca peluda foi a planta que apresentou maior quantidade de fenóis totais (1,23 mg.g-1), seguido pelo nabo forrageiro (0,76 mg.g-1) e pela aveia preta (0,4 mg.g-1). Foram identificados dez compostos fenólicos no extrato aquoso, sendo o ácido benzoico e o p-cumarico os mais abundantes, seguidos pelo ácido ferúlico e ácido p-hidroxibenzócio. As quantidades de palhada do nabo forrageiro e de aveia preta apresentaram menor interferência na emergência e no vigor do milho, sendo que a ervilhaca peluda foi mais prejudicial para o desenvolvimento inicial do milho, afetando a germinação e o vigor. Estudos posteriores devem ser realizados avaliando essa interferência a campo e potencial inibitório dos compostos fenólicos encontrados sobre as plantas receptoras. The use of cover crops has been a strategy for farmers to reduce the use of synthetic chemical inputs. This work aimed to evaluate the allelopathic potential of cover crops fodder radish, black oats and hairy vetch on maize and weeds Amaranthus spinosus and Ipomoea grandifolia. The work was divided into three experiments. In the first one the allelopathic potential of root exudates of cover crops was evaluated on the germination and growth of weeds and maize. The evaluations were: germination, Germination Rate Index (GRI), growth and dry matter weight of root and shoot, germination, GRI and growth of spiny amaranth, root protrusion, Root Protrusion Rate Index (RPRI) and morning-glory growth. In the second experiment the allelopathic potential of the aqueous extract of the aerial part of cover crops was evaluated in the germination and growth of weeds and maize. For this, the analyzes performed were the same as the first experiment. In the third experiment the objective was to evaluate the allelopathic potential of the degradation of cover crops in emergence and initial development of maize, with the following analyzes: emergence percentage, Emergency Rate Index (ERI), chlorophyll A, B and Total, leaf area and weight of dry matter of maize seedlings. Laboratory bioassays were conducted to evaluate the phytotoxicity of root exudate and aqueous extract and greenhouse bioassay to evaluate the phytotoxicity of straw degradation on the initial development of maize. Black oat root exudation was the one that presented the greatest phytotoxicity to the initial development of the maize seedlings and weeds tested, followed by root exudate of hairy vetch that also presented phytotoxicity to maize and weeds. The aqueous extract that most affected the vigor and germination of maize was hairy vetch, followed by black oat and fodder radish. Low concentrations of aqueous extracts are less phytotoxic to the initial development of maize, and weeds are more sensitive. The highest amount of total phenols is present in hairy vetch (1.23 mg.g-1), followed by fodder radish (0.76 mg.g-1) and black oat (0.4 mg.g-1). Ten phenolic compounds were identified in the aqueous extract, with benzoic and p-coumaric acids being the most frequent, followed by ferulic acid and phydroxybenzoic acid. The different amounts of straw of fodder radish and black oats do not present interference to the emergence and vigor of maize, and the hairy vetch has been shown to be harmful to the initial development of maize, affecting germination and vigor. Further studies should be performed evaluating this field interference and the inhibition of the phenolic compounds found on target plants.
- Published
- 2018
35. Análise das condições de instalação que proporcionam um maior desempenho da placa fotovoltaica
- Author
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Martins, Jeize Nunes Alves, Rosa, Loiane, and Silva, Álvaro Bittencourt Henrique
- Subjects
Placa fotovoltaica ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] ,Energia elétrica ,Carregador - Abstract
Submitted by Alessandro Candido (alessandro.candido@ucb.br) on 2018-05-10T19:40:42Z No. of bitstreams: 1 JeizeNunesAlvesMartinseLoianeRosaTCCGraduacao2017.pdf: 1097360 bytes, checksum: 0da160d56dfa2069bd658003cdc0a6e4 (MD5) Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2018-05-14T14:50:05Z (GMT) No. of bitstreams: 1 JeizeNunesAlvesMartinseLoianeRosaTCCGraduacao2017.pdf: 1097360 bytes, checksum: 0da160d56dfa2069bd658003cdc0a6e4 (MD5) Made available in DSpace on 2018-05-14T14:50:05Z (GMT). No. of bitstreams: 1 JeizeNunesAlvesMartinseLoianeRosaTCCGraduacao2017.pdf: 1097360 bytes, checksum: 0da160d56dfa2069bd658003cdc0a6e4 (MD5) Previous issue date: 2017-03-09 O aumento da demanda no consumo de energia elétrica está intimamente ligado ao desenvolvimento industrial, bem como às necessidades de redução dos gases de efeito estufa e redução da conta de energia elétrica. O consumo de energia elétrica mundial cresce a cada dia, no consumo industrial, comercial e privado atrelado a demanda de energia de novas tecnologias. A geração de energia no Brasil é o resultado da produção de cerca de 560 usinas e subestações e 1079 linhas de transmissão que formam a rede de operação o ONS – Operador Nacional do Sistema Elétrico. A capacidade instalada dessas usinas alcançou a potência total de 152.192.480 KW. Dessa época para cá, adotam-se medidas de economia, buscam-se soluções através de geração de termoelétricas, porém o consumo é sempre crescente, apesar das altas tarifas aplicadas. Em função da demanda crescente procuramos estabelecer uma fonte de geração de energia no campus da UCB (Universidade Católica de Brasília) para carregamento de aparelhos celulares no próprio campus como alternativa sustentável à energia elétrica utilizada sem aumento de custos fixos. Utilizando uma pequena placa fotovoltaica de 5,5 x 6,5 cm, 6v de tensão e 580mAsob a iluminação de lâmpadas incandescentes de 100 w foi possível recarregar um aparelho antigo Samsung modelo GT E1207 de 3,7 Volts e 800 mA necessitando de aproximadamente 460 minutos (7 horas e 40 minutos), mostrando que sua utilização não é adequada para smartphones.
- Published
- 2017
36. Comparação entre a eficiência da placa aquecedora solar metálica e a placa aquecedora solar plástica
- Author
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Locateli Junior, Douglas Vitoriano and Silva, Álvaro Bittencourt Henrique
- Subjects
Sustentabilidade ,Eficiência energética ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] ,Placa aquecedora solar - Abstract
Submitted by Alessandro Candido (alessandro.candido@ucb.br) on 2018-04-27T20:06:36Z No. of bitstreams: 1 DouglasVitorianoLocateliJúniorTCCGraduacao2017.pdf: 1367139 bytes, checksum: ad2eeefcb110abfb06d92e728e790523 (MD5) Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2018-05-03T14:22:11Z (GMT) No. of bitstreams: 1 DouglasVitorianoLocateliJúniorTCCGraduacao2017.pdf: 1367139 bytes, checksum: ad2eeefcb110abfb06d92e728e790523 (MD5) Made available in DSpace on 2018-05-03T14:22:11Z (GMT). No. of bitstreams: 1 DouglasVitorianoLocateliJúniorTCCGraduacao2017.pdf: 1367139 bytes, checksum: ad2eeefcb110abfb06d92e728e790523 (MD5) Previous issue date: 2017 O presente trabalho tem por objetivo comparar a eficiência entre a placa de aquecimento solar metálica industrial da marca Ouro Fino e uma placa aquecedora solar de PVC semelhante, construída de forma artesanal, instalada na Universidade Católica de Brasília em parceria com o professor Nilo Mendes do CELOGS (Campo-Escola de Logística de Subsistência). O trabalho introduz conceitos sobre aquecimento solar e uma revisão bibliográfica dos seguintes tópicos: radiação solar, usos das placas aquecedoras solares de acordo com o manual Ouro Fino, sua eficiência em relação a posicionamento e procedimentos de instalação, bem como sua importância frente à questão energética e de sustentabilidade. Com os princípios definidos, foi realizado o monitoramento dos sistemas nos horários de pico e desse modo foi possível realizar um comparativo de temperatura entre as placas mostrando qual apresenta maior eficiência e expõe uma comparação de custos benéficos de ambas.
- Published
- 2017
37. Modelo de personalização de dose de bussulfano intravenoso baseado no genótipo de GSTA1 durante regime de condicionamento do transplante de células-tronco hematopoiéticas em crianças
- Author
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Nava, Tiago Rodrigues, Daudt, Liane Esteves, and Bittencourt, Henrique Neves da Silva
- Subjects
Bussulfano ,GSTA1 ,Farmacocinética ,Farmacogenética ,HSCT ,Parmacogenetics ,Hematopoietic stem cell transplantation ,Pharmacokinetics ,Transplante de células-tronco hematopoéticas ,Polymorphisms ,Population pharmacokinetic model ,Busulfan - Abstract
O bussulfano (Bu) é um agente alquilante usado no condicionamento que precede o transplante de células-tronco hematopoiéticas (TCTH) em crianças. Sua farmacocinética (FC) apresenta uma grande variabilidade interindivíduo, que pode ser parcialmente explicada pelas variantes genéticas de GSTA1, gene da enzima glutationa S-transferase α1, crucial para o metabolismo do Bu. Vários métodos de predição da FC do Bu são usados para calcular sua dose, essencialmente com base na idade e peso do paciente. Até o momento, apenas um modelo adulto incorporou as variantes de GSTA1 no cálculo da sua dose do Bu. No presente trabalho, avaliou-se, inicialmente, o desempenho de métodos atualmente disponíveis em pediatria, em função das variantes genéticas de GSTA1. Foram avaliados os parâmetros de FC da primeira dose de 101 crianças e adolescentes submetidos a TCTH alogênico no CHU Sainte-Justine, Montreal, Canadá, após regime de condicionamento que incluía Bu intravenoso (BuCR, do inglês busulfan-containing regimen). Os haplótipos GSTA1 foram interpretados em pares (diplótipos) e depois classificados em três grupos com base nos seus diferentes potenciais de expressão enzimática. As AUCs (area under the curve) medidas e as AUCs calculadas a partir de doses de Bu preditas por 11 modelos diferentes foram classificadas de acordo com a sua capacidade para atingir a AUC-alvo (900 a 1.500 μM.min). Também foram calculados os erros de previsão do clearance do Bu. Após a primeira dose, as AUCs medidas atingiram a AUC-alvo em 38,7%. Os diplótipos de GSTA1 relacionados ao metabolismo lento (G3) e regimes contendo fludarabina (FluCR, do inglês fludarabine-containing regimen) foram os únicos fatores associados à AUC no alvo (OR 4,7, IC 95%, 1,1 - 19,8, p = 0,04 e OR 9,9, IC 95%, 1,6 - 61,7, p = 0,01, respectivamente). Utilizando os outros métodos para o cálculo da dose, a percentagem de AUC no alvo variou de 16% a 74%. G3 e FluCR foram, em alguns modelos, associados à AUC no alvo ou na faixa tóxica, enquanto que os metabolizadores rápidos (G1) foram por vezes associados a AUCs subterapêuticas. Essas associações foram confirmadas na análise de predição do clearance, em que os diplótipos da GSTA1 e o regime de condicionamento influenciaram significativamente a maioria dos erros de previsão dos métodos testados. Uma vez que GSTA1 mostrou influenciar significativamente os algoritmos disponíveis, pretendeu-se desenvolver um modelo de FC de população que incluísse variantes genéticas de GSTA1 como um fator no cálculo de dose do Bu. Para tanto, foram analisados os dados de concentração-tempo de 112 crianças e adolescentes que receberam um BuCR mieloablativo antes de 115 TCTH (autólogos e alogênicos), realizados também no CHU Sainte-Justine. Para a construção do modelo de FC de população, utilizou-se uma análise mista não linear. Sexo, doença de base (maligna vs. não maligna), idade pós-menstrual (PMA) ou idade cronológica, regime de condicionamento e diplótipos de GSTA1 foram avaliados como fatores potenciais. Um modelo de um compartimento com eliminação de primeira ordem foi o que melhor descreveu os dados disponíveis. Um fator de maturação do metabolismo de Bu (Fmat) e o peso elevado a exponencial alométrico teórico foram incluídos no modelo de base. A análise dos fatores revelou PMA (ΔOFV = -26,7, p = 2,3x10-7) e grupos de diplótipos de GSTA1 (ΔOFV = -11,7, p = 0,003) como fatores significativamente associados, respectivamente, ao volume e ao CL do Bu. Os CL dos metabolizadores rápidos (G1) foram preditos como sendo 7% mais elevados que os definidos como metabolizadores normais (G2), enquanto que os metabolizadores lentos (G3) foram descritos com CL 12% menor que os G2. Em conclusão, após se evidenciar que os métodos disponíveis para o cálculo de dose do Bu não são adequados para todos os grupos de diplótipos de GSTA1, propôs-se o primeiro algoritmo de cálculo de dose de Bu em pediatria baseado em farmacogenética. Seu uso pode contribuir para uma melhor previsibilidade da FC do Bu e, desta forma, melhor predizer a exposição de crianças e adolescentes à droga, de acordo com a capacidade metabólica de cada indivíduo. Busulfan (Bu) is an alkylating agent used in the conditioning before hematopoietic stem cells transplantation (HSCT) in children. Its pharmacokinetics (PK) presents a great inter-individual variability, which can be partially explained by GSTA1 genetic variants, gene coding for the enzyme glutathione s-tranferase α1, crucial for Bu metabolism. Several methods of predicting PK are available and are used to calculate the Bu dose, based essentially on patients’ age and anthropometric characteristics. So far, a single adult model successfully incorporated this factor into the Bu dose calculation. In the present work, we initially evaluate the performance of the currently available guidelines across the different GSTA1 genetic variants. The PK parameters from the Bu first doses from 101 children and adolescents who have undergone allogenic SCT at the CHU Sainte-Justine, Montreal, Canada following a IV Bu-containing conditioning regimen (BuCR). GSTA1 haplotypes were interpreted in pairs (diplotypes) and then classified in 3 groups based on different potentials of enzyme expression. Measured AUCs and AUCs calculated from Bu doses predicted by 11 different models were classified according to their ability to achieve the AUC target (900 and 1500μM.min). Clearance prediction errors were also calculated. After the first dose, measured AUCs achieved the target in 38.7%. GSTA1 diplotypes groups related to poor Bu metabolism (G3) and fludarabine-containing regimens (FluCR) were the only factors associated with AUC within target (OR 4.7, 95% CI, 1.1 - 19.8, p=0.04 and OR 9.9, 95% CI, 1.6 - 61.7, p=0.01, respectively). Using other methods for dose calculation, percentage of AUCs within target varied from 16% to 74%. G3 and FluCR were, in some models, associated to AUC within the target and in the toxic range, whereas rapid-metabolizers (G1) were correlated with sub therapeutic AUCs. These associations were confirmed in clearance-prediction analysis, where GSTA1 diplotypes groups and conditioning regimen consistently influenced methods’ most prediction errors. Once GSTA1 status was demonstrated to influence significantly the available Bu dosing algorithms, we aimed to develop a population PK (PPK) model which included GSTA1 genetic variants as a covariate. For that, concentration-time data from 112 children and adolescents receiving IV Bu as a component of the conditioning regimen for 115 stem cell transplantations (autologous and allogenic) performed at CHU Sainte-Justine were analyzed. Non-linear mixed effects analysis was used to build a PPK model. Sex, baseline disease (malignant vs. non-malignant), post-menstrual age (PMA) or chronological age, conditioning regimen and GSTA1 diplotypes groups were evaluated as potential covariates. A one-compartment model with first-order elimination best described the data. A factor of Bu metabolism maturation (Fmat) and theoretical allometric scaling of weight were included in the base model. Covariate analysis revealed PMA (ΔOFV=-26.7, p=2.3x10-7) and GSTA1 diplotypes groups (ΔOFV=-11.7, p=0.003), as significant factors on volume and clearance (CL), respectively. CL of rapid metabolizers (G1) were predicted as being 7% higher and that of poor ones (G3) 12% lower than CL of those defined as normal metabolizers (G2). In conclusion, after evidencing that available Bu dosing methods are not suitable for all GSTA1 diplotypes groups, we have proposed the first pharmacogenomics-based dosing algorithm for Bu to be used in a pediatrics. Its use may contribute considerably to better predict Bu exposure in children and adolescents tailoring the dose according to individual metabolic capacity.
- Published
- 2017
38. Utilização do sistema fotovoltaico On-Grid em instalação domiciliar para alimentação do consumo doméstico
- Author
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Chamiço, Glayson Luiz Alvarenga and Silva, Álvaro Bittencourt Henrique
- Subjects
Energia solar ,Engenharia civil ,Energias renováveis ,Sistema fotovoltaico ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] ,Painéis solares ,Método On-Grid - Abstract
Submitted by Franciene Aguiar (franciene.aguiar@ucb.br) on 2017-05-15T18:19:03Z No. of bitstreams: 1 GlaysonLuizAlvarengaChamiçoTCCGRADUACAO2016.pdf: 2254401 bytes, checksum: bc2bfab5ab586e27bddeeec4542907a3 (MD5) Approved for entry into archive by Repositório Institucional Universidade Católica de Brasília (sdi@ucb.br) on 2017-05-15T19:45:33Z (GMT) No. of bitstreams: 1 GlaysonLuizAlvarengaChamiçoTCCGRADUACAO2016.pdf: 2254401 bytes, checksum: bc2bfab5ab586e27bddeeec4542907a3 (MD5) Made available in DSpace on 2017-05-15T19:45:33Z (GMT). No. of bitstreams: 1 GlaysonLuizAlvarengaChamiçoTCCGRADUACAO2016.pdf: 2254401 bytes, checksum: bc2bfab5ab586e27bddeeec4542907a3 (MD5) Previous issue date: 2016-06-15 A necessidade de suprir a demanda do consumo de energia elétrica no mundo traz em pauta, como alternativa para solução, o uso das energias renováveis. Dentre elas, tem-se notado o crescimento constante das instalações do sistema de energia solar fotovoltaico, principalmente no âmbito domiciliar. Este trabalho é referente ao estudo de caso da instalação do sistema fotovoltaico On-Grid em uma residência localizada na cidade de Sobradinho, Distrito Federal, Brasil. O método On-Grid do sistema solar fotovoltaico é conectado a rede elétrica, sendo toda produção de energia elétrica por meio dos painéis solares controlada por um relógio, que, informa a quantidade de energia elétrica produzida e consumida. The need to supply the electricity demand around the world makes people consider, as a possible solution, the use of renewable energies. Among all of them, it is noticed the growth in photovoltaic solar systems installations, mostly considering private homes. This project is related to a studying case of On-Grid photovoltaic system installation, at a house located in Sobradinho, Federal District, Brazil. The photovoltaic solar system’s On-Grid method is connected to the electrical grid and all electricity production through solar panels is controlled by a ‘‘clock’’ that tells the electricity amount produced and consumed.
- Published
- 2016
39. Avaliação de programas especializados na implantação de sistemas prediais em uma unidade do Governo Federal na cidade de Florianópolis SC
- Author
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Santos, Asaph Coutinho Pevidor dos and Silva, Álvaro Bittencourt Henrique
- Subjects
Lumine V4 ,Engenharia civil ,Hydros V4 ,Construção civil ,Eficiência energética ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] ,Energia elétrica - Abstract
Submitted by Franciene Aguiar (franciene.aguiar@ucb.br) on 2017-05-10T17:57:16Z No. of bitstreams: 1 AsaphCoutinhoPevidorDosSantosTCCGRADUACAO2016.pdf: 1433832 bytes, checksum: 452b5343d51d4a88771e0c314e5f5611 (MD5) Approved for entry into archive by Repositório Institucional Universidade Católica de Brasília (sdi@ucb.br) on 2017-05-11T11:51:37Z (GMT) No. of bitstreams: 1 AsaphCoutinhoPevidorDosSantosTCCGRADUACAO2016.pdf: 1433832 bytes, checksum: 452b5343d51d4a88771e0c314e5f5611 (MD5) Made available in DSpace on 2017-05-11T11:51:37Z (GMT). No. of bitstreams: 1 AsaphCoutinhoPevidorDosSantosTCCGRADUACAO2016.pdf: 1433832 bytes, checksum: 452b5343d51d4a88771e0c314e5f5611 (MD5) Previous issue date: 2016 Serão utilizados três programas como ferramentas de apoio para a realização do estudo de caso, sendo eles o Lumine V4, o Hydros V4 e o tradicional AutoCAD, divulgando assim softwares que otimizam o tempo de trabalho de um projetista. O padrão de etiquetagem predial do PROCEL permite a aferição de eficiência predial de acordo com a nova norma de edificação de iluminação, usaremos o Lumine V4. Trabalharemos também com o programa Hydros V4 que possibilita o estudo de formas de abastecimento de água fria predial atendendo as condições da norma, economia e manutenção. Por fim o programa AutoCad, que serve como ferramenta de apoio para plantas utilizadas no projeto. No Brasil, existe preocupação com o consumo de água e energia elétrica quando se trata de edificações públicas, buscando dar exemplo de sustentabilidade para a população, evitando assim problemas de escassez e racionamento de água e energia em determinados períodos e cidades brasileiras. Então com objetivo de promover o uso consciente de energia elétrica, foi criado em novembro de 2014 um selo PROCEL de edificações que tem como objetivo classificações de eficiência energética motivando o mercado a adquiri e utilizar imóveis mais eficientes onde a ocasiões em que é possível obter resultados de até 50% de economia de energia elétrica, proporcionando uma drástica redução de gastos para o governo. It’ll be used three different software as a support for this paper, which will be Lumine V4, Hydros V5 and AutoCAD. The choice of these computer programs is to optimize the work time and the efficiency. The standard building labeling of PROCEL allows the measurement of the electrical efficiency according to the rules used on the building’s illuminations, which will be sim ulated by using the Lumine V4. Furthermore, the Hydros V4 will be used to study the ways of arranging cold water by the rules, savings and maintenance conditions. Lastly, the AutoCAD software will provide the support to the building plans of this project. There is a general concern in Brazil about the water and electricity consumption of the public buildings. They are required to use solutions of sustainability to save these kind of resources to be an example to the population and to help to avoid problems such as water and electricity rationing. Therefore, to promote a better and a rightful use of electrical energy, it was created a seal called PROCEL on November 2014, which classifies the electrical efficiency on buildings. The results were fantastic as the government could reduce expenses because this project made it possibly to save up to 50% of electricity consumption Keywords
- Published
- 2016
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