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[SciELO Preprints] - Guidelines on the Diagnosis and Treatment of Hypertrophic Cardiomyopathy – 2024
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Fernandes, Fabio Simões, Marcus V. Correia, Edileide de Barros Marcondes-Braga, Fabiana G. Coelho-Filho, Otavio Rizzi Mesquita, Cláudio Tinoco Mathias-Junior, Wilson Rochitte, Carlos Eduardo Ramires, Felix José Alvarez Alves, Silvia Marinho Martins Montera, Marcelo Westerlund Lopes, Renato Delascio Oliveira-Junior, Mucio Tavares Scolari, Fernando L. Avila, Walkiria Samuel Canesin, Manoel Fernandes Bacal, Fernando Bocchi, Edimar Alcides Moura, Lídia Ana Zytynski Saad, Eduardo Benchimol Scanavacca, Mauricio I. Valdigem, Bruno Pereira Cano , Manuel Nicolas Abizaid , Alexandre Ribeiro, Henrique Barbosa Lemos-Neto, Pedro Alves Ribeiro, Gustavo Calado de Aguiar Jatene, Fabio Biscegli Dias, Ricardo Ribeiro Beck-da-Silva, Luis Rohde, Luis Eduardo P. Bittencourt, Marcelo Imbroinise Pereira, Alexandre Krieger, José Eduardo Villacorta, Humberto Martins, Wolney de Andrade Figueiredo-Neto, José Albuquerque de Cardoso , Juliano Novaes Pastore, Carlos Alberto Jatene, Ieda Biscegli Tanaka, Ana Cristina Sayuri Hotta, Viviane Tiemi Romano, Minna Moreira Dias Albuquerque, Denilson Campos de Mourilhe-Rocha, Ricardo Hajjar, Ludhmila Abrahão Brito, Fabio Sandoli de Caramelli , Bruno Calderaro, Daniela Farsky, Pedro Silvio Colafranceschi , Alexandre Siciliano Pinto, Ibraim Masciarelli Vieira , Marcelo Luiz Campos Danzmann, Luiz Claudio Barberato , Silvio Henrique Mady, Charles Martinelli-Filho, Martino Torbey , Ana Flavia Malheiros Schwartzmann, Pedro Vellosa Macedo, Ariane Vieira Scarlatelli Ferreira , Silvia Moreira Ayub Schmidt, Andre Melo , Marcelo Dantas Tavares de Lima-Filho, Moysés Oliveira Sposito, Andrei C. Brito, Flavio de Souza Biolo, Andreia Madrini-Junior, Vagner Rizk, Stéphanie Itala Mesquita, Evandro Tinoco

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Publication date: 2024-04-08

Abstract: Pt Es En

A cardiomiopatia hipertrófica (CMH) é uma forma de doença do músculo cardíaco de causa genética, caracterizada pela hipertrofia das paredes ventriculares. O diagnóstico requer detecção por métodos de imagem (Ecocardiograma ou Ressonância Magnética Cardíaca) de qualquer segmento da parede do ventrículo esquerdo com espessura > 15 mm, sem outra causa provável. A análise genética permite identificar mutações de genes codificantes de diferentes estruturas do sarcômero responsáveis pelo desenvolvimento da CMH em cerca de 60% dos casos, permitindo o rastreio de familiares e aconselhamento genético, como parte importante do manejo dos pacientes e familiares. Vários conceitos sobre a CMH foram recentemente revistos, incluindo sua prevalência de 1 em 250 indivíduos, não sendo, portanto, uma doença rara, mas subdiagnosticada. A vasta maioria dos pacientes é assintomática. Naqueles sintomáticos, a obstrução do trato de saída do ventrículo esquerdo (OTSVE) é o principal distúrbio responsável pelos sintomas, devendo-se investigar a sua presença em todos os casos. Naqueles em que o ecocardiograma em repouso ou com Manobra de Valsalva não detecta gradiente intraventricular significativo (> 30 mmHg), devem ser submetidos à ecocardiografia com esforço físico para detecção da OTSVE.   Pacientes com sintomas limitantes e grave OTSVE, refratários ao uso de betabloqueadores e verapamil, devem receber terapias de redução septal ou uso de novas drogas inibidoras da miosina cardíaca. Por fim, os pacientes adequadamente identificados com risco aumentado de morta súbita podem receber medida profilática com implante de cardiodesfibrilador implantável (CDI).

La miocardiopatía hipertrófica (MCH) es una forma de enfermedad cardíaca de origen genético, caracterizada por el engrosamiento de las paredes ventriculares. El diagnóstico requiere la detección mediante métodos de imagen (Ecocardiograma o Resonancia Magnética Cardíaca) que muestren algún segmento de la pared ventricular izquierda con un grosor > 15 mm, sin otra causa probable. El análisis genético permite identificar mutaciones en genes que codifican diferentes estructuras del sarcómero responsables del desarrollo de la MCH en aproximadamente el 60% de los casos, lo que permite el tamizaje de familiares y el asesoramiento genético, como parte importante del manejo de pacientes y familiares. Varios conceptos sobre la MCH han sido revisados recientemente, incluida su prevalencia de 1 entre 250 individuos, por lo tanto, no es una enfermedad rara, sino subdiagnosticada. La gran mayoría de los pacientes son asintomáticos. En los casos sintomáticos, la obstrucción del tracto de salida ventricular izquierdo (TSVI) es el trastorno principal responsable de los síntomas, y su presencia debe investigarse en todos los casos. En aquellos en los que el ecocardiograma en reposo o la maniobra de Valsalva no detecta un gradiente intraventricular significativo (> 30 mmHg), deben someterse a ecocardiografía de esfuerzo para detectar la obstrucción del TSVI. Los pacientes con síntomas limitantes y obstrucción grave del TSVI, refractarios al uso de betabloqueantes y verapamilo, deben recibir terapias de reducción septal o usar nuevos medicamentos inhibidores de la miosina cardíaca. Finalmente, los pacientes adecuadamente identificados con un riesgo aumentado de muerte súbita pueden recibir medidas profilácticas con el implante de un cardioversor-desfibrilador implantable (CDI).

Hypertrophic cardiomyopathy (HCM) is a form of genetically caused heart muscle disease, characterized by the thickening of the ventricular walls. Diagnosis requires detection through imaging methods (Echocardiogram or Cardiac Magnetic Resonance) showing any segment of the left ventricular wall with a thickness > 15 mm, without any other probable cause. Genetic analysis allows the identification of mutations in genes encoding different structures of the sarcomere responsible for the development of HCM in about 60% of cases, enabling screening of family members and genetic counseling, as an important part of patient and family management. Several concepts about HCM have recently been reviewed, including its prevalence of 1 in 250 individuals, hence not a rare but rather underdiagnosed disease. The vast majority of patients are asymptomatic. In symptomatic cases, obstruction of the left ventricular outflow tract (LVOT) is the primary disorder responsible for symptoms, and its presence should be investigated in all cases. In those where resting echocardiogram or Valsalva maneuver does not detect significant intraventricular gradient (> 30 mmHg), they should undergo stress echocardiography to detect LVOT obstruction. Patients with limiting symptoms and severe LVOT obstruction, refractory to beta-blockers and verapamil, should receive septal reduction therapies or use new drugs inhibiting cardiac myosin. Finally, appropriately identified patients at increased risk of sudden death may receive prophylactic measure with implantable cardioverter-defibrillator (ICD) implantation.

https://doi.org/10.1590/SciELOPreprints.8394

Translation, Cross-Cultural Adaptation, and Validation of the Hypertension Self-Care Profile (HBP-SCP) for the Brazilian Population
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Baggio, Jussara Almeida de Oliveira

; Ribeiro, Beatriz Brito

; Ribeiro, Jessica Lays Ferreira

; Silva, Fabricio Brito

; Azevedo, Lisiane Fernanda Simeão de

; Mendes, Renata Gonçalves

; Araújo, Aldair Darlan

; Gonçalves, Maria Claudia

; Tavarez, Rudys Rodolfo de Jesus

; Almeida, Denilson Menezes

; Bassi-Dibai, Daniela

International Journal of Cardiovascular Sciences

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2023, Volume 36 elocation e20230075

Abstract: En | Text: En | PDF: En

Abstract Background Self-care in the management of systemic arterial hypertension (SAH) is crucial, and validated instruments can help researchers and health professionals to plan strategies to improve self-care in people with SAH. Objective The main objective of this study was to translate, cross-culturally adapt, and validated the Hypertension Self-Care Profile (HBP-SCP) for Brazilian Portuguese. Methods The translation and cross-cultural adaptation was performed in five phases, and the pre-final version was tested in 30 individuals, native speakers of Portuguese with a diagnosis of hypertension. The final version was administered in 100 individuals. The inclusion criteria were: diagnosis of SAH, characterized by systolic arterial blood pressure ≥ 140 mmHg and/or diastolic arterial blood pressure ≥ 90mmHg, regular use of antihypertensive medications and over 18 years of age. The present study also used two other questionnaires, previously validated for the Brazilian population, to verify the validity of the construct, the Healthy Habits Perception Questionnaire (HHPQ) and the Quality of Life in Hypertension Mini-Questionnaire (MINICHAL-BRASIL). Results During the translation and cross-cultural adaptation phase, there were no disagreements. Adequate reliability — intraclass correlation coefficient (ICC) ≥ 0.89, standard error of measurement (SEM) % ≤ 4.34, minimum detectable change (MDC) % ≤ 12.04 — and internal consistency (Cronbach's alpha ≥ 0.75) were observed. The behavior domain of HBP-SCP obtained significant correlations (p < 0.05) with the self-efficacy domain and HHPQ; the motivation domain with the self-efficacy domain; and the self-efficacy domain with the somatic manifestation domain of MINICHAL-BRASIL. No ceiling and floor effects were observed. Conclusions The Brazilian Portuguese version of the HBP-SCP has adequate psychometric properties, according to the best scientific recommendations.

https://doi.org/10.36660/ijcs.20230075

Tendência da Mortalidade por Doenças Cerebrovasculares no Brasil (1996-2015) e Associação com Desenvolvimento Humano e Vulnerabilidade Social
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Souza, Carlos Dornels Freire de

; Oliveira, Denilson José de

; Silva, Leonardo Feitosa da

; Santos, Camila Damasceno dos

; Pereira, Monaliza Coelho

; Paiva, João Paulo Silva de

; Leal, Thiago Cavalcanti

; Mariano, Renato de Souza

; Araújo, Amanda Karine Barros Ferreira de

; Baggio, Jussara Almeida de Oliveira

Arquivos Brasileiros de Cardiologia

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jan 2021, Volume 116 N. 1 Pages 89 - 99

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Fundamento As doenças cerebrovasculares (DCBV) constituem a segunda causa de mortes no mundo. Objetivo Analisar a tendência da mortalidade por DCVB no Brasil (1996-2015) e associação com o índice de desenvolvimento humano (IDH) e o índice de vulnerabilidade social (IVS). Métodos Trata-se de estudo ecológico envolvendo as taxas de mortalidade padronizadas por DCBV. Os dados dos óbitos foram obtidos do Sistema de Informações sobre Mortalidade e os dados populacionais, do Instituto Brasileiro de Geografia e Estatística. Para as análises temporais, foi utilizado o modelo de regressão por pontos de inflexão, sendo calculado o percentual de variação anual (annual percent change [APC]) e médio do período (average annual percent change [AAPC]), com intervalo de confiança de 95% e significância de 5%. As tendências foram classificadas em crescente, decrescente ou estacionária. O modelo de regressão multivariada foi utilizado para testar a associação entre a mortalidade por DCBV, IDH e IVS. Resultados Foram registrados 1.850.811 óbitos por DCBV no período estudado. Observou-se redução da taxa de mortalidade nacional (APC: -2,4; p = 0,001). Vinte unidades federativas apresentaram tendências significativas, sendo 13 de redução, incluindo todos das regiões Centro-Oeste (n = 4), Sudeste (n = 4) e Sul (n = 3). O IDH teve associação positiva e o IVS, associação negativa com a mortalidade (p = 0,046 e p = 0,026, respectivamente). Conclusão O estudo mostrou comportamento epidemiológico desigual da mortalidade entre as regiões, sendo maior nos estados do Sudeste e Sul, porém com tendência significativa de redução, e menor nos estados do Norte e Nordeste, mas com tendência significativa de crescimento. O IDH e o IVS associaram-se com a mortalidade. (Arq Bras Cardiol. 2021; 116(1):89-99)

Abstract Background Cerebrovascular diseases (CBVD) are the second major cause of death in the world. Objective To analyze the mortality trend of CBVD in Brazil (1996 to 2015) and its association with Human Development Index (HDI) and the Social Vulnerability Index (SVI). Methods This is an ecological study. We analyzed the mortality rate standardized by CBVD. Death data were obtained from the Mortality Information System (SIM) and populational data from the Brazilian Institute of Geography and Statistics (IBGE). The model of regression by inflection points (Joinpoint regression) was used to perform the temporal analysis, calculating the Annual Percent Change (APC) and Average Annual Percent Change (AAPC), with 95% of confidence interval and a significance of 5%. Trends were classified as increasing, decreasing or stationary. A multivariate regression model was used to analyze the association between mortality by CBVD, HDI and SVI. Results During this period, 1,850,811 deaths by CBVD were recorded. We observed a reduction in the national mortality rate (APC -2.4; p = 0.001). Twenty federation units showed a significant trend, of which 13 showed reduction, including all states in the Midwest (n=4), Southeast (n=4) and South (n=3). The HDI was positively associated and the SVI was negatively associated with mortality (p = 0.046 and p = 0.026, respectively). Conclusion An unequal epidemiological course of mortality was observed between the regions, being higher in the Southeast and South states, with a significative tendency of reduction, and lower in the North and Northeast states, but with a significative tendency of increase. HDI and SVI showed an association with mortality. (Arq Bras Cardiol. 2021; 116(1):89-99)

https://doi.org/10.36660/abc.20190532 875 downloads

Registro Multicêntrico de Takotsubo (REMUTA) – Aspectos Clínicos, Desfechos Intra-Hospitalares e Mortalidade a Longo Prazo
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Almeida Junior, Gustavo Luiz Gouvêa de

; Mansur Filho, João

; Albuquerque, Denilson Campos de

; Xavier, Sergio Salles

; Pontes, Álvaro

; Gouvêa, Elias Pimentel

; Martins, Alexandre Bahia Barreiras

; Nunes, Nágela S. V.

; Carestiato, Lilian Vieira

; Petriz, João Luiz Fernandes

; Santos, Armando Márcio Gonçalves

; Bandeira, Bruno Santana

; Abufaiad, Bárbara Elaine de Jesus

; Pacheco, Luciana da Camara

; Oliveira, Maurício Sales de

; Ribeiro Filho, Paulo Eduardo Campana

; Sampaio, Pedro Paulo Nogueres

; Duque, Gustavo Salgado

; Camillis, Luiz Felipe

; Marques, André Casarsa

; Lourenço Jr, Francisco Carlos

; Palazzo, José Ricardo

; Costa, Cláudio Ramos da

; Silva, Bibiana Almeida da

; Zukowski, Cleverson Neves

; Garcia, Romulo Ribeiro

; Zonis, Fernanda de Carvalho

; Paula, Suzana Andressa Morais de

; Ferrari, Carolina Gravano Ferraz

; Rangel, Bruno Soares da Silva

; Ferreira, Roberto Muniz

; Mendes, Bárbara Ferreira da Silva

; Castro, Isabela Ribeiro Carvalho de

; Souza, Leonardo Giglio Gonçalves de

; Araújo, Luiz Henrique dos Santos

; Giani, Alexandre

Arquivos Brasileiros de Cardiologia

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aug 2020, Volume 115 N. 2 Pages 207 - 216

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Fundamento A síndrome de takotsubo (takotsubo) é uma forma de cardiomiopatia adquirida. Dados nacionais sobre essa condição são escassos. O Registro REMUTA é o primeiro a incluir dados multicêntricos dessa condição no nosso país. Objetivo Descrever as características clínicas, prognóstico, tratamento intra-hospitalar e mortalidade hospitalar e em 1 ano de seguimento. Métodos Estudo observacional, retrospectivo, tipo registro. Incluídos pacientes internados com diagnóstico de takotsubo ou que desenvolveram esta condição durante internação por outra causa. Os desfechos avaliados incluíram fator desencadeador, análise dos exames, uso de medicações, complicações e óbito intra-hospitalar e em 1 ano de seguimento. O nível de significância adotado foi de 5%. Resultados Foram incluídos 169 pacientes, em 12 centros no Estado do Rio de Janeiro. A idade média foi de 70,9 ± 14,1 anos e 90,5% eram do sexo feminino; 63% dos casos foram de takotsubo primário e 37% secundário. Troponina I foi positiva em 92,5% dos pacientes e a mediana de BNP foi de 395 (176,5; 1725). Supradesnivelamento do segmento ST esteve presente em 28% dos pacientes. A fração de ejeção do ventrículo esquerdo teve mediana de 40 (35; 48)%. Observamos taxa de 25,7% de ventilação mecânica invasiva e 17,4% de choque. Suporte circulatório mecânico foi utilizado em 7,7%. A mortalidade intra-hospitalar foi de 10,6% e a mortalidade ao final de 1 ano foi de 16,5%. Takotsubo secundário e choque cardiogênico foram preditores independentes de mortalidade. Conclusão Os resultados do REMUTA mostram que takotsubo não se trata de patologia benigna como se pensava, especialmente no grupo de takotsubo secundário que acarreta elevada taxa de complicações e de mortalidade. (Arq Bras Cardiol. 2020; 115(2):207-216)

Abstract Background Takotsubo syndrome (TTS) is an acquired form of cardiomyopathy. National Brazilian data on this condition are scarce. The Takotsubo Multicenter Registry (REMUTA) is the first to include multicenter data on this condition in Brazil. Objective To describe the clinical characteristics, prognosis, in-hospital treatment, in-hospital mortality, and mortality during 1 year of follow-up. Methods This is an observational, retrospective registry study including patients admitted to the hospital with diagnosis of TTS and patients admitted for other reasons who developed this condition. Evaluated outcomes included triggering factor, analysis of exams, use of medications, complications, in-hospital mortality, and mortality during 1 year of follow-up. A significance level of 5% was adopted. Results The registry included 169 patients from 12 centers in the state of Rio de Janeiro, Brazil. Mean age was 70.9 ± 14.1 years, and 90.5% of patients were female; 63% of cases were primary TTS, and 37% were secondary. Troponin I was positive in 92.5% of patients, and median BNP was 395 (176.5; 1725). ST-segment elevation was present in 28% of patients. Median left ventricular ejection fraction was 40 (35; 48)%. We observed invasive mechanical ventilation in 25.7% of cases and shock in 17.4%. Mechanical circulatory support was used in 7.7%. In-hospital mortality was 10.6%, and mortality at 1 year of follow-up was 16.5%. Secondary TTS and cardiogenic shock were independent predictors of mortality. Conclusion The results of the REMUTA show that TTS is not a benign pathology, as was once thought, especially regarding the secondary TTS group, which has a high rate of complications and mortality. (Arq Bras Cardiol. 2020; 115(2):207-216)

https://doi.org/10.36660/abc.20190166 1217 downloads

TOXICITY OF ALKALOID FRACTIONS FROM Psychotria spp. (RUBIACEAE) AGAINST Atta sexdens FOREL, 1908 (HYMENOPTERA: FORMICIDAE)
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Alves, Dejane Santos

; Fernandez, Pilar Canela Garcia

; Martin, Alejandro Martin

; Budia, Flor

; Carvalho, Geraldo Andrade

; Zanetti, Ronald

; Oliveira, Denilson Ferreira de

CERNE

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jun 2019, Volume 25 N. 2 Pages 255 - 262

Abstract: En | Text: En | PDF: En

ABSTRACT Leaf-cutting ants are the main pests in forest plantations. The most commonly used chemical control for the ants is toxic bait. However, the active ingredients in these baits have been restricted by forest certification organizations, justifying the search for new active compounds to control these insects. Thus, this work aimed to evaluate the formicidal activity of alkaloid fractions from the roots, stems, branches and leaves of Psychotria hastisepala and Psychotria leiocarpa (Rubiaceae) against Atta sexdens Forel, 1908 (Hymenoptera: Formicidae). The alkaloid fractions were obtained from the crude methanolic extracts of P. hastisepala and P. leiocarpa by the acid-base extraction method employing liquid-liquid partitions. The fractions, previously solubilized in propanone, were applied topically to the pronotum of worker ants. Bioassays were conducted in a completely randomized design, with six replicates of each treatment and 10 ants per replicate. Insect survival was assessed daily for 21 days. The median lethal time was estimated by Weibull models. The root fractions from P. hastisepala presented the highest toxicity, followed by those from the branches, stems and leaves. Among fractions from P. hastisepala roots, the most toxic were a fraction that apparently is rich in lipophilic compounds and nonbasic alkaloids and a fraction that is likely rich in quaternary benzophenanthridine alkaloids, protopine alkaloids and tertiary bases. Psychotria leiocarpa fractions were not toxic to this insect. Psychotria hastisepala is potentially useful for the development of new products for A. sexdens control.

https://doi.org/10.1590/01047760201925022632 843 downloads

Screening of Brazilian plant extracts as candidates for the control of Spodoptera frugiperda (Lepidoptera: Noctuidae)
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Santos Alves, Dejane

; Andrade Carvalho, Geraldo

; Ferreira Oliveira, Denilson

; Duarte Corrêa, Angelita

Revista Colombiana de Entomología

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jun 2018, Volume 44 N. 1 Pages 32 - 38

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen Los efectos de extractos de las plantas Actinostemon concolor, Geonoma shottiana, Palicourea rigida y Rudgea viburnoides sobre Spodoptera frugiperda fueron evaluados en este estudio. Los extratos se incorporaron en la dieta artificial (1 mg mL-1 de la dieta) y se ofrecieron a larvas de S. frugiperda. El extracto de A. concolor causó 36,1 % de mortalidad. Se detectaron cambios ultraestructurales en los huevos de adultos alimentados en sus estados larvales con extractos de P. rigida y A. concolor. Se observó reducción de la actividad de la tripsina de S. frugiperda después del tratamiento con el extracto de A. concolor. Al cuantificar los fenoles totales en A. concolor, G. shottiana, P. rigida y R. viburnoides, se encontró que A. concolor fue la especie con mayor contenido. El residuo de metanol/agua extracción, que se obtuvo del extracto crudo de A. concolor, contenía compuestos fenólicos que causan cambios en la biología de S. frugiperda similar a los generados por el extracto crudo. En conclusión, A. concolor produce metabolitos secundarios con actividad insecticida sobre S. frugiperda.

Abstract The effects of plant extracts from Actinostemon concolor, Geonoma schottiana, Palicourea rigida and Rudgea viburnoides on Spodoptera frugiperda were evaluated in this study. The extracts were incorporated into an artificial diet (1 mg mL-1 of diet) and offered to S. frugiperda caterpillars. The extract of A. concolor caused 36.1 % mortality in S. frugiperda. Ultrastructural changes were detected in the eggs of adults when the caterpillars were fed with P. rigida and A. concolor extracts. A reduction in trypsin activity was observed after treatment with A. concolor extract. Total phenolics were quantified for A. concolor, G. schottiana, P. rigida and R. viburnoides, with A. concolor presenting the highest content. The residue from methanol/water extraction, which was obtained from the crude extract of A. concolor, contained the phenolic compounds that caused changes in S. frugiperda biology similar to those caused by the crude extract. In conclusion, A. concolor produces secondary metabolites that have insecticidal activity on S. frugiperda.

https://doi.org/10.25100/socolen.v44i1.6539 457 downloads

Effects of Copaiba oil in the healing process of urinary bladder in rats
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Feitosa Junior, Denilson José Silva

; Carvalho, Luan Teles Ferreira de

; Rocha, Ingrid Rodrigues de Oliveira

; Brito, Camila Noura de

; Moreira, Rodrigo Alencar

; Barros, Charles Alberto Villacorta de

International braz j urol

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apr 2018, Volume 44 N. 2 Pages 384 - 389

Abstract: En | Text: En | PDF: En

ABSTRACT Introduction The appropriate closure of the urinary bladder is important to many urologic procedures to avoid the formation of fistulas and strictures by excessive fibrosis. This paper presents the alterations in the bladder healing process of rats after the topical use of Copaiba oil (Copaifera reticulata). Material and Methods Ten male Wistar rats were used and randomly divided into two groups: Control group (CG): injected 1ml/kg of saline solution on the suture line; and Copaiba group (CpG): 0.63ml/kg of copaiba oil applied to the suture line. Euthanasia was performed on the seventh day after surgery. The criteria observed were adherences formation, histopathological modifications and stereology for collagen. Results Both groups showed adhesions to the bladder, with no statistically significant difference (p=0.1481). The microscopic evaluation revealed a trend to more severe acute inflammation process on the CpG, but there was statistical difference only in the giant cells reaction (p=0.0472) and vascular proliferation (p=0.0472). The stereology showed no difference. Conclusion The copaiba oil modified the healing process, improving the quantity of giant cells and vascular proliferation, but not interfered in the collagen physiology.

https://doi.org/10.1590/s1677-5538.ibju.2017.0143 951 downloads

Microstructural characterization and mechanical behavior of a low-carbon 17%Mn steel
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Spindola, Mirelle Oliveira

; Dafé, Sara Silva Ferreira de

; Carmo, Denilson José do

; Santos, Dagoberto Brandão

Materials Research

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jun 2014, Volume 17 N. 3 Pages 694 - 699

Abstract: En | Text: En | PDF: En

Steels containing high levels of Mn, Si and Al exhibit high plasticity when deformed, owing to twinning-induced plastitity (TWIP) and transformation-induced plasticity (TRIP) effects. In this study, we investigated the microstructural evolution of samples of samples of a 17%Mn steel subjected to war rolling at 700º and 800ºC. We also studied the effects of the microstructure of the steel samples on their mechanical behavior. Using a mathematic model the stacking fault energy of the steel was estimated to be 14.5 mJ/m². This value was indicative of a martensitic transformation. The presence of martensite and twinned austenite was verified using optical microscopy, scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) analyses. The presence of austenite and ε- and α'-martensites was confirmed using X-ray diffraction (XRD) analyses and dilatometry. Increasing the rate of cold reduction resulted in the formation of a α'-martensite phase and a decrease in the volume fraction of the ε-martensite phase. The volume fractions of the various phases were measured by integrating the areas under the XRD peaks. The sample subjected to a cold-rolling reduction of 81% and a subsequent annealing treatment did not contain a α'-martensite phase, indicating that it was fully recrystallized. The Vickers microhardness of the samples increased with an increase in the cold-rolling reduction rate. However, the microhardness values of the cold-rolled samples decreased after the annealing treatment.

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Influência da natureza do rejeito agroindustrial fermentado por Xanthomonas axonopodis pv. manihotis nas propriedades das gomas xantana resultantes
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Assis, Denilson de Jesus

; Costa, Larissa Alves de Sousa

; Campos, Márcio Inomata

; Souza, Carolina Oliveira de

; Druzian, Janice Izabel

; Nunes, Itaciara Lazorra

; Padilha, Francine Ferreira

Polímeros

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2014, Volume 24 N. 2 Pages 176 - 183

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Um destino para resíduos agro-industriais é usá-los como substratos fermentescíveis, diminuindo o custo na produção de produtos com alto valor agregado. Este trabalho avaliou a influência da natureza dos resíduos fermentescíveis e das cepas de Xanthomonas sobre a produção e propriedades do biopolímero resultante. A produção foi realizada em agitador orbital (250 rpm / 28 °C / 120 h) por fermentação de sacarose (controle), glicerina residual do biodiesel e resíduo líquido de sisal. Tanto a composição do substrato como as cepas mostraram um forte efeito sobre a produção (0,36-2,40 gL- 1), viscosidade aparente (13,73 para 36,31 mPa.s) e massa molecular (2,1-5,9 × 10(6) Da) da goma de xantana resultante, não influenciando o comportamento pseudoplástico de soluções aquosas dos biopolímeros.

A destination for agro-industrial waste is to use them as fermentation substrates. This work was aimed at evaluating the influence of the nature of the waste fermented by two strains of Xanthomonason on the biopolymer properties. The production was performed in an orbital shaker (250 rpm / 28 °C / 120 h) by fermentation of sucrose (control), crude glycerin from biodiesel and sisal liquid waste. Both the fermented substrate composition and the strains had a strong impact on production (0.36 to 2.40 g.L- 1), apparent viscosity (13.73 to 36.31 mPa.s) and molecular mass (2.1 to 5.9 × 10(6) Da) of the resulting xanthan gum, but they did not affect the pseudoplastic behavior of aqueous biopolymers solutions.

https://doi.org/10.4322/polimeros.2014.064 1360 downloads

10.

Extrato de Coffea racemosa como alternativa no controle do bicho-mineiro do cafeeiro
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Alves, Dejane Santos

; Oliveira, Denilson Ferreira

; Carvalho, Geraldo Andrade

; Santos, Mírian Aparecida Isidro

Ciência e Agrotecnologia

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apr 2011, Volume 35 N. 2 Pages 250 - 258

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Objetivou-se, com o presente trabalho, verificar o efeito do extrato metanólico de Coffea racemosa Lour., espécie silvestre de cafeeiro portadora de resistência a uma das principais pragas da cultura cafeeira, o bicho-mineiro. Inicialmente, o extrato metanólico das folhas de C. racemosa foi pulverizado em mudas de cafeeiro Coffea arabica cv. Catuaí, em casa-de-vegetação, as quais foram expostas a adultos de L. coffeella para o teste de oviposição com chance de escolha. Observou-se que as plantas tratadas foram menos preferidas para oviposição. A seguir, realizou-se o teste de efeito ovicida, no qual mudas de C. arabica contendo ovos do bicho-mineiro foram pulverizadas com o mesmo extrato. Os experimentos foram conduzidos em delineamento inteiramente casualizado com cinco repetições. Verificou-se redução significativa na eclosão de larvas, e segundo análise por microscopia eletrônica de varredura, os ovos não viáveis apresentaram anomalias nas superfícies externas. Entretanto, os adultos provenientes de ovos tratados não foram afetados na percentagem de emergência, razão sexual e oviposição. Os resultados obtidos demonstram que C. racemosa apresenta-se como uma alternativa promissora ao controle do bicho-mineiro, necessitando, no entanto, de novos estudos para isolamento e identificação das substâncias bioativas.

The objective of this study was to evaluate the effect of Coffea racemosa Lour. methanolic extract , a wild coffee specie that presents resistance against the coffee leaf-miner, a major pest of coffee crop. The methanol extract of C. racemosa leaves was sprayed on coffee seedlings, Coffea arabica cv. Catuaí, in greenhouse, which were exposed to adults of L. coffeella for oviposition in free choice test. Plants treated were less preferred for oviposition. An ovicidal assay was carried out by spraying the methanol extract on C. arabica seedlings containing L. coffeela eggs on their leaves. The experiments were conducted in a completely randomized design with five replicates. Larvae hatching out from treated eggs were significantly reduced by the extract and non viable eggs presented some anomalies on their external surfaces according to analyses by scanning electron microscopy. However, the adults derived from treated eggs did not have the percentage of emergence, sex ratio and oviposition affected by the treatment. The results show that C. racemosa presents as a promising alternative to control the coffee leaf-miner, being necessary new studies to isolate and caracterize the bioactive substances against this pest.

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11.

Purificação do flavonóide trans-tilirosídeo do extrato metanólico das folhas de Gochnatia barrosii Cabrera (asteraceae) e avaliação da sua atividade nematicida
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Santos Júnior, Helvécio Martins dos

; Tirelli, Aline Auxiliadora

; Carvalho, Hudson Wallace Pereira

; Oliveira, Denilson Ferreira

; Prado, Robson Taironi do

; Campos, Vicente Paulo

Ciência e Agrotecnologia

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oct 2010, Volume 34 N. 5 Pages 1224 - 1231

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O fracionamento do extrato metanólico das folhas de Gochnatia barrosii Cabrera (Asteraceae) resultou no isolamento do flavonol glicosídico trans-tilirosídeo [kaempferol 3-O- -D-(6''-O-E-p-cumaroil)-glicopiranosídeo], que nunca tinha sido identificado na referida espécie vegetal. Em teste realizado in vitro, observou-se que tal substância a 500 μg/mL, não tem efeito sobre a mortalidade de juvenis do segundo estágio do nematóide Meloidogyne exigua Goeldi.

Fractionation of the methanolic extract from Gochnatia barrosii Cabrera (Asteraceae) leaves resulted in the isolation of the flavonol glycoside trans-tiliroside [kaempferol 3-O- -D-(6''-O-E-p-coumaroyl)-glucopyranoside], which had never been found in such plant species. Such substance at 500 μg/mL caused no in vitro effect on the mortality of second-stage juveniles of the nematode Meloidogyne exigua Goeldi.

2826 downloads

12.

Effect of plant and fungous metabolites on Meloidogyne exigua
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Amaral, Daniel Rufino

; Oliveira, Denilson Ferreira

; Campos, Vicente Paulo

; Pantaleão, José Antônio

; Carvalho, Douglas Antônio de

; Nunes, Alexandro da Silva

Ciência e Agrotecnologia

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2009, Volume 33 N. spe Pages 1861 - 1865

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Os nematóides acarretam grandes perdas aos produtores brasileiros de café, sendo necessário o desenvolvimento de métodos eficientes para o seu controle. Em trabalho anterior, Allium cepa L., Cajanus cajan (L.) Mill., Crotalaria juncea L., Ficus elastica Roxb., Ruta graveolens L., Stylosanthes guianensis Aubl., Leucaena leucocephala (Lam.) Dewit., Brachiaria decumbens Stapf., Catharanthus roseus G. Don, Tagetes minuta L., Ricinus communis L. e Coffea arabica L. produziram substâncias ativas contra o nematóide Meloidogyne exigua Goeldi, que é amplamente disseminado pelos cafezais brasileiros. Dando continuidade a esse trabalho, extratos aquosos das plantas mencionadas, coletadas em época diferente daquela mencionada no trabalho anterior, bem como metabólitos na forma bruta de Fusarium moniliforme Shelden e Cylindrocarpon magnusianum (Sacc.) Woll., produzidos em meio de cultura líquido, foram submetidos a testes in vitro com juvenis do segundo estádio (J2) de M. exigua. Todas as plantas e fungos produziram substâncias ativas contra J2. Portanto, seus metabólitos foram aplicados em mudas de café de seis meses de idade, inoculadas com M. exigua. Após 90 dias em casa de vegetação, verificou-se que os materiais oriundos de A. cepa, L. leucocephala, R. graveolens e F. moniliforme inibiram a produção de ovos e de galhas por M. exigua, demonstrando potencial para o controle de tal parasita.

As nematodes cause great damage to Brazilian coffee production, effective methods to control these parasites are necessary. In a previous work Allium cepa L., Cajanus cajan (L.) Mill., Crotalaria juncea L., Ficus elastica Roxb., Ruta graveolens L., Stylosanthes guianensis Aubl., Leucaena leucocephala (Lam.) Dewit., Brachiaria decumbens Stapf., Catharanthus roseus G. Don, Tagetes minuta L., Ricinus communis L. and Coffea arabica L. produced active substances against Meloidogyne exigua Goeldi, a nematode widely disseminated through Brazilian coffee fields. Thus, aqueous extracts of such plants, collected in a different season from that of the previous work, as well as crude metabolites produced in liquid medium by Fusarium moniliforme Shelden and Cylindrocarpon magnusianum (Sacc.) Woll., were submitted to in vitro assays with M. exigua second-stage juveniles (J2). All plants and fungi produced active substances against J2. Therefore, their metabolites were applied to six-month-old coffee plants inoculated with M. exigua. After 90 days in a greenhouse, those samples obtained from A. cepa, L. leucocephala, R. graveolens and F. moniliforme inhibited the production of galls and eggs by M. exigua, demonstrating potential to control such parasite.

2395 downloads Cited 1 time in SciELO

13.

Evaluation of the antifungal activity by plant extracts against Colletotrichum gloeosporioides Penz
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Silva, Polyanna Alves

; Oliveira, Denilson Ferreira

; Prado, Ney Robson Taironi do

; Carvalho, Douglas Antônio de

; Carvalho, Gilvane Aparecida de

Ciência e Agrotecnologia

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apr 2008, Volume 32 N. 2 Pages 420 - 428

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Com vistas a contribuir para o desenvolvimento de métodos mais eficientes e menos agressivos ao ambiente que aqueles disponíveis para o controle de Colletotrichum gloeosporioides Penz, causador da mancha manteigosa em cafeeiros, buscou-se identificar espécies vegetais produtoras de substâncias ativas contra o referido patógeno. Para tanto, prepararam-se extratos de 48 espécies vegetais, coletadas na região do Alto Rio Grande, em Minas Gerais, para serem submetidos a testes in vitro com o mencionado fungo. Constatou-se que os melhores resultados foram obtidos com os extratos oriundos de Digitalis lanata Ehrh, Origanum manjorona L., Plantago lanceolata Hook. e Stevia rebaudiana (Bertoni) Bertoni que inibiram a germinação dos esporos de C. gloeosporioides. Alguns dos extratos ativos também foram submetidos a diluições em solução aquosa de Tween 80 a 1%, o que permitiu observar que, na proporção de 1:2 ou 1:3 (extrato: solução aquosa), os extratos perdiam a atividade antifúngica. Verificou-se também que alguns dos extratos ativos não alteraram suas atividades quando submetidos ao processo de liofilização. Desse modo, identificaram-se várias plantas promissoras na pesquisa por novas substâncias bioativas para o controle de C. gloeosporioides, com destaque para O. manjorona L., que inibiu 96% da germinação dos esporos do referido fungo.

Aiming to develop more efficient and environmental friendly methods than those available to control Colletotrichum gloeosporioides Penz, which causes blister spot in coffee trees, a search for plants able to produce substances active against such pathogen was carried out. Thus, extracts of 48 plant species, collected at Alto Rio Grande region, in Minas Gerais, were prepared and submitted to in vitro assays with that fungus. The best results were obtained with the extracts prepared from Digitalis lanata Ehrh, Origanum manjorona L., Plantago lanceolata Hook. and Stevia rebaudiana (Bertoni) Bertoni, which inhibited C. gloeosporioides spores germination. After dilution of some active extracts with aqueous 1 % Tween 80 solution in a 1:2 or 1:3 ratio (extract:aqueous solution), their antifungal activity vanished. Some of the active extracts were also submitted to freeze drying and none of them presented any alteration in their antifungal activity. Concluding, several plants presented potential to be used in the search for new bioactive substances to control C. gloeosporioides, especially O. manjorona L., which inhibited 96 % of the fungus spores germination.

4863 downloads Cited 3 times in SciELO

14.

Influência de extratos vegetais no desenvolvimento in vitro de plântulas de Rosa x hybrida
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Alves, Dejane Santos

; Oliveira, Denilson Ferreira de

; Pasqual, Moacir

; Carvalho, Douglas Antônio de

; Rodrigues, Vantuil A.

; Carvalho, Daniel Diego Costa

Ciência e Agrotecnologia

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dec 2007, Volume 31 N. 6 Pages 1888 - 1892

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Estudou-se a influência de extratos vegetais no crescimento, in vitro, de plântulas de Rosa x hybrida, objetivando o desenvolvimento de novos reguladores vegetais para a propagação dessa planta ornamental. Extratos metanólicos de Saintpaulia ionantha Wendl. (folhas), Hibiscus rosa-sinensis L. (folhas) e Bougainvillea spectabilis Wild. (folhas e flores) foram obtidos nas concentrações de 150 e 300 mg.L-1. Na ocasião de preparo do extrato todas as plantas se encontravam no período de floração. O experimento foi realizado em delineamento inteiramente casualizado com dez tratamentos e quatro repetições. Dois desses tratamentos foram utilizados como controle: meio de cultura com e sem BAP (6-benzilaminopurina). As variáveis analisadas foram: número e comprimento de brotos, número e comprimento de raízes, e número de folhas por broto. Quanto à variável número de brotos, todos os extratos testados se comportaram como o controle sem o BAP. No que diz respeito ao número e comprimento de raízes, apenas o extrato das folhas de H. rosa-sinensis na concentração de 300 mg.L-1 se mostrou diferente do controle sem o BAP, com valores estatisticamente iguais ao do controle com BAP. Excetuando-se o extrato de H. rosa-sinensis, todos reduziram o número de folhas por broto. Embora os efeitos observados não tenham sido tão pronunciados quanto os causados pelo BAP, os resultados indicam a presença de fitormônios nos extratos estudados.

This work aimed to study the influence of plant extracts on the in vitro growth of Rosa x hybrida plantlets, to contribute to the development of new plant growth regulators to propagate such ornamental plant. Methanolic extracts of Saintpaulia ionantha Wendl. (leaves), Hibiscus rosa-sinensis L. (leaves) and Bougainvillea spectabilis Wild. (leaves and flowers) were employed at 150 and 300 mg.L-1. Flowering plants were used to obtain the extracts. The experiment was carried out in a randomized design, with ten treatments and four repetitions. Culture medium with and without BAP (6-benzylaminopurine) were used as controls. The analyzed variables were shoot number and length, root number and length, and leaves per shoot. Regarding shoot number, all extracts were statistically identical to the control without BAP. When root number and length were taken into account, only the extract of H. rosa-sinensis leaves at 300 mg.L-1 differed from the control without BAP, with values statistically identical to the control with BAP. Except for the H. rosa-sinensis extract, all the others reduced the number of leaves per shoot. Although the observed effects were not as pronounced as those obtained with BAP, these results indicate the presence of plant growth regulators in the studied extracts.

2513 downloads

15.

Avaliação da capacidade de produzir fitotoxinas in vitro por parte de fungos com propriedades antagônicas a nematóides
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Carvalho, Daniel Diego Costa

; Oliveira, Denilson Ferreira de

; Campos, Vicente Paulo

; Pasqual, Moacir

; Gimarães, Renato Mendes

; Corrêa, Rogério Sebastião Batista

Ciência e Agrotecnologia

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dec 2006, Volume 30 N. 6 Pages 1230 - 1235

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Em trabalho preliminar foram obtidos 24 isolados fúngicos com propriedades antagônicas a nematóides parasitas de plantas segundo experimentos realizados em laboratório. Para dar continuidade a tal trabalho, tornou-se desejável dispor de metodologia simples e de baixo custo para selecionar aqueles sem capacidade de produção de substâncias fitotóxicas, para serem empregados em experimentos em casa-de-vegetação com fitonematóides. Conseqüentemente, cultivaram-se os fungos em meio líquido e, após filtração, as fases líquidas foram liofilizadas e extraídas com acetato de etila/metanol. Os extratos foram concentrados sob vácuo e dissolvidos em água e solução de sacarose para serem submetidos a testes in vitro com sementes de alface (Lactuca sativa L.) e com coleóptilos de trigo (Triticum aestivum L.), respectivamente. Vinte e três isolados pertencentes aos gêneros Arthrobotrys, Aspergillus, Coniothyrium, Cunninghamella, Cylindrocarpon, Fusarium, Monacrosporium, Mortierella, Paecilomyces, Penicillium, Sclerotinia, Trichoderma e Verticillium, apresentaram atividade tóxica contra os coleóptilos de trigo. Apenas os isolados de Cylindrocarpon magnusianum (Sacc.) Wollenw., Fusarium moniliforme Shelden, Mortierella sp., Paecilomyces lilacinus (Thom.) Samson e Penicillium sp. apresentaram atividade fitotóxica no teste com sementes de alface. Somente um isolado de F. moniliforme se mostrou inativo em ambos os testes, o que sugere que não seja produtor de fitotoxinas.

In a previous work 24 fungi cultures were selected due to their antagonic properties to phytonematodes in laboratory experiments. To proceed to further studies, it became desirable to use a simple and inexpensive methodology to identify those fungi able to produce phytotoxic substances, so that only the non phytotoxin producers could be used in green-house experiments with plant parasite nematodes. Thus, fungi were grown in liquid medium and the resulting mixtures were submitted to filtration. The liquid phases were freeze-dried and extracted with ethyl acetate/methanol. After extracts concentration under vacuum, the remaining substances were dissolved in water and aqueous saccharose solution to be submitted to in vitro assays with lettuce seeds (Lactuca sativa L.) and wheat coleoptile (Triticum aestivum L.), respectively. Twenty three isolates from genera Arthrobotrys, Aspergillus, Coniothyrium, Cunninghamella, Cylindrocarpon, Fusarium, Monacrosporium, Mortierella, Paecilomyces, Penicillium, Sclerotinia, Trichoderma and Verticillium, presented toxic activity against wheat coleoptile, though only isolates of Cylindrocarpon magnusianum (Sacc.) Wollenw., Fusarium moniliforme Shelden, Mortierella sp., Paecilomyces lilacinus (Thom.) Samson and Penicillium sp., presented phytotoxic effects in the lettuce seeds assay. Only one isolate of F. moniliforme was inactive in both assays, what suggests that this fungus is not able to produce phytotoxins.

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