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This work describes a green synthesis, the characterization, and biological evaluation of silver nanoparticles (AgNPs). The AgNPs suspension was synthesized using aqueous leaf extract of Eucalyptus grandis, which presented a characteristic band at 407 nm in the UV-Vis spectrum. The AgNPs presented a spherical shape and size of 9.7 ± 0.3 nm. The nanoparticles were stable over a month, indicating that E. grandis’ extract is suitable for their preparation and stabilization. The X-ray analysis showed that the crystallinity of AgNPs corresponded to the centered face phase of silver. The antibacterial and leishmanicidal activities of AgNPs were evaluated. The AgNPs presented antibacterial activity on the Gram-negative bacteria Escherichia coli at 53.9 µg mL-1. The leishmanicidal activity evaluation against promastigote forms of Leishmania infantum, Leishmania amazonensis, and Leishmania braziliensis showed that the biological response is dependent on the volume of AgNP suspension. It was demonstrated that L. infantum was more sensitive to the nanoparticle’s treatment than L. amazonensis and L. braziliensis. The treatment of L infantum promastigotes with 150 µL of AgNP suspension reduced parasite growth by 67.9%, a result which was similar to the treatment with 1 (66.7%) or 2 µL (70.6%) of amphotericin B used as a positive control.

https://doi.org/10.21577/0103-5053.20220126

Economic gains using organic P source and inoculation with P-solubilizing bacteria in sugarcane
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Silva, Antonio M. M.

; Pimenta, Lucas S.

; Qi, Xue

; J. B. N. Cardoso, Elke

Revista Brasileira de Engenharia Agrícola e Ambiental

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Feb 2023, Volumen 27 Nº 2 Paginas 101 - 107

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO O agronegócio biológico cresceu substancialmente em todo o mundo, demandando estratégias eficientes para manter ou aumentar a produção vegetal. Entretanto, pouco se conhece a respeito dos reais ganhos econômicos associados aos mecanismos que ocorrem na agricultura, incluindo cultivos tradicionais como a cana-de-açúcar. Buscou-se neste estudo encontrar potenciais indicadores microbiológicos relacionados com o aumento de produtividade e, paralelamente, valorar os serviços microbiológicos do solo por meio do desenvolvimento de uma equação estrutural (SEM). A SEM foi construída com base nos dados prévios de um experimento com cana-de-açúcar a campo, no qual os efeitos da inoculação com bactérias solubilizadoras de fosfato e utilização de fertilizante organomineral foram avaliados. A SEM indicou que as atividades de β-glucosidase e fosfatase alcalina foram potenciais indicadores relacionados ao aumento de produtividade em quatro cenários (atual, plausível, otimista e futurista). Aumentos de 158 e 195 t ha-1 foram projetados com base na atividade de β-glucosidase para os cenários atual e plausível, respectivamente. Estes aumentos resultaram em ganhos econômicos de R$ 453,02 ha-1 (US$ 86,07 ha-1) para o cenário atual, e R$ 1.571,53 ha-1 (US$ 298,59 ha-1) para o cenário plausível, considerando a taxa de câmbio de fevereiro de 2022 (R$ 0,19 US$-1). Independente do cenário, a inoculação bacteriana esteve associada a maiores atividades de β-glucosidase ou fosfatase alcalina e também maiores produtividades, o que se traduziu em ganhos econômicos para os agricultores de cana-de-açúcar.

ABSTRACT Biological agribusiness has grown substantially worldwide and requires efficient strategies to maintain or increase crop production. However, little is known about the real economic gains associated with belowground mechanisms in agriculture, including those of traditional crops such as sugarcane. This study aimed to identify potential microbiological indicators related to yield increase and value the soil microbiological services through the development of a structural equation model (SEM). The SEM was constructed based on a dataset from a previous sugarcane field experiment in which the effects of inoculation with phosphate-solubilizing bacteria (PSB) and the input of organomineral fertilizer were evaluated. The SEM indicated that the β-glucosidase and alkaline phosphatase activities were potential indicators of yield increases in four scenarios (current, plausible, optimistic, and futuristic). Increases of 158 and 195 t ha-1 were projected based on the β-glucosidase activity for the current and plausible scenarios, respectively. These increases resulted in economic gains of R$ 453.02 ha-1 (US$ 86.07 ha-1) for the current scenario, and R$ 1,571.53 ha-1 (US$ 298.59 ha-1) for the plausible scenario, considering the exchange rate from February 2022 (R$ 0.19 US$-1). Regardless of the scenario, bacterial inoculation was associated with increased β-glucosidase or alkaline phosphatase activity and higher yields, which translates into economic gains for sugarcane farmers.

https://doi.org/10.1590/1807-1929/agriambi.v27n2p101-107

Synthesis and Anticancer Activity of Homodimeric Morita-Baylis-Hillman Adducts Based on 3-Hydroxyindolin-2-one Core
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Coelho, Maísa C.

; Castro, Aleff

; Olegário, Tayná R.

; Cristiano, Rodrigo

; Vaz, Boniek G.

; Santos, Gabriel F. dos

; Machado, Lucas S.

; Militão, Gardênia C. G.

; Silva, Paulo B. N. da

; Vasconcellos, Mário L. A. A.

; Lima-Junior, Claudio G.

Journal of the Brazilian Chemical Society

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2023, Volumen 34 Nº 9 Paginas 1273 - 1283

Resumen: En | Texto: En | PDF: En

Cancer treatment represents one of the main scientific study targets today, mainly due to the pronounced side effects arising from chemotherapy. This study reports the synthesis, characterization, and anticancer activity of ten compounds from the Morita-Baylis-Hillman reaction. Ethylene glycol diacrylate was used as a double Michael acceptor in reactions with isatin derivatives to give homodimers of 3-hydroxyindolin-2-one core, recognized in the literature for its extensive pharmacological profile. The use of 1,4-diazabicyclo[2,2,2]octane (DABCO) as a catalyst and room temperature were the optimal conditions for the study reaction. The isolated yields were up to 63%, with most reaction times inferior to 24 h, some as fast as 15 min. The anticancer potential of the synthesized dimers was evaluated in vitro against three cancer strains, resulting in average inhibitory concentrations up to 0.72 µM. It was also found that the best performing homodimers are more active than their monomeric counterparts. Considering the promising selectivity indices observed, the preliminary results obtained here act as a basis for broader tests regarding the effectiveness of homodimeric adducts against cancer cells.

https://doi.org/10.21577/0103-5053.20230038

Assessment of morphophysiological and genotypic diversity of endophytic bacteria isolated from rice (Oryza sativa L.) plants
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Leonardo-Silva, Lucas

; Silva, Larissa B. da

; Ferreira, Enderson P. de B.

; Reis, Karina F. D. N. S. dos

; Naves, Plínio L. F.

; Martin-Didonet, Claudia C. G.

Revista Caatinga

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2023, Volumen 36 Nº 4 Paginas 775 - 784

Resumen: En Pt | Texto: En Pt | PDF: En | PDF: Pt

ABSTRACT Rice production in Brazil incurs high costs due to the significant use of agrochemicals. Some plant growth-promoting rhizobacteria (PGPR) can be used as alternative to fertilizers and phytosanitary products. Thus, the objective of this study was to characterize endophytic bacteria isolated from roots of rice plants. The isolates were characterized based on colony morphology, antibiotic resistance, carbon sources utilization, enzyme activity (catalase, amylase, protease, cellulase, and lipase), inorganic phosphate solubilization, and the 16S-23S rDNA intergenic region. Morphologically, 68% of the isolates presented a rapid growth rate, 46% presented abundant mucus production, and 77% formed viscous colonies. All isolates were resistant to nalidixic acid and 16% presented resistance to streptomycin. The majority (90%) used monosaccharides and disaccharides in carbon source assays. Most of the isolates (95%) were positive for catalase and 63.6% were positive for amylase, protease, lipase, and cellulase activities. Additionally, 59% of them were able to solubilize phosphate. The mean enzymatic index for amylase, cellulase, and protease was 2.8, 3.5, and 1.7 respectively. The similarity analysis revealed high diversity among the isolates, with similarity indices of 70% (based on morphological characteristics) and 60% (based on the intergenic region 16S-23S rDNA). Considering morphophysiological and genotypic characteristics, three promising isolates should be evaluated in studies under field conditions for the potential development of bioproducts to replace industrially manufactured inputs in rice crops.

RESUMO O arroz apresenta altos custos de produção no Brasil devido ao elevado uso de agroquímicos. Algumas rizobactérias promotoras de crescimento de plantas (PGPR) podem ser utilizadas como alternativa aos fertilizantes e produtos fitossanitários. Este trabalho teve como objetivo caracterizar bactérias endofíticas obtidas de raízes de arroz. A caracterização dos isolados foi baseada na morfologia da colônia, resistência a antibióticos, uso de fontes de carbono, atividade enzimática (catalase, amilase, protease, celulase e lipase), solubilização de fosfato inorgânico e região intergênica do 16S-23S rDNA. Com base na morfologia, 68% dos isolados apresentaram crescimento rápido, 46% apresentaram produção abundante de muco e 77% apresentaram colônia viscosa. Todos os isolados foram resistentes ao ácido nalidíxico e 16% deles à estreptomicina. A maioria dos isolados (90%) utilizou monossacarídeos e dissacarídeos no ensaio da fonte de carbono. A maioria dos isolados (95%) foi positiva para catalase e 63,6% foram positivas para amilase, protease, lipase e celulase. Além disso, 59% foram capazes de solubilizar o fosfato. A média do índice enzimático para amilase, celulase e protease foi de 2,8, 3,5 e 1,7, respectivamente. A análise de similaridade revelou alta diversidade entre os isolados, com índice de similaridade de 70% (baseado nas características morfológicas) e 60% (baseado na análise da região intergênica 16S-23S rDNA). Com base nas características morfofisiológicas e genotípicas, três isolados promissores devem ser avaliados em estudos futuros em condições de campo, podendo gerar bioprodutos destinados a substituir insumos industrializados na cultura do arroz.

https://doi.org/10.1590/1983-21252023v36n405rc

Natural erosion potential in the Mato Grosso state, Brazil
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Raimo, Luis A. Di L. Di

; Amorim, Ricardo S. S.

; Couto, Eduardo G.

; Hunter, Maria O.

; Torres, Gilmar N.

; Bocuti, Edwaldo D.

; Silva, Lucas de C. M. da

Revista Brasileira de Engenharia Agrícola e Ambiental

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Sep 2022, Volumen 26 Nº 9 Paginas 655 - 661

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO O entendimento da suscetibilidade de solos à erosão é crucial para o planejamento de uso da terra visando uma agricultura sustentável. O estudo teve como objetivo determinar a variabilidade espacial do potencial natural de erosão para o Estado de Mato Grosso, um importante centro agrícola do Brasil. O potencial natural de erosão foi calculado usando a Equação Universal de Perda de Solo, que considera a erosividade, erodibilidade e o fator topográfico. Para cada um desses três fatores foi criado um mapa em formato raster, que foi combinado em um Sistema de Informação Geográfica e usado para criar o mapa de potencial natural de erosão. O mapa foi, então, utilizado para separar classes do potencial natural de erosão para o Estado de Mato Grosso. O Estado predominantemente apresentou níveis médios de potencial natural de erosão (58,38% da área), seguido por altos (21,67%) e baixos (19,57%) níveis. As áreas de baixo potencial natural de erosão estão predominantemente localizadas nas partes mais planas do Estado. O fator topográfico apresentou forte correlação com o potencial natural de erosão, sendo um importante componente para auxiliar o planejamento do uso da terra e práticas de conservação do solo. Regiões consideradas com maiores potenciais naturais de erosão são mais comuns nas macrorregiões noroeste (46,69% da área), norte (32,7%) e oeste (30,05%).

ABSTRACT Understanding the susceptibility of soils to erosion is crucial for planning land use towards sustainable agriculture. This study aimed to determine the spatial variability of natural erosion potential for the state of Mato Grosso, an important agricultural center of Brazil. Natural erosion potential was calculated using the Universal Soil Loss Equation, which accounts for erosivity, erodibility, and the topographic factor. For each of these three factors, a map was generated in raster format that was combined into a Geographic Information System and used to create a map of natural erosion potential. This map was then used to separate classes of natural erosion potential for the state of Mato Grosso. The state predominantly has medium levels of natural erosion potential (58.38% in area), followed by high (21.67%) and low (19.57%) levels. Areas of low natural erosion potential are predominantly located in the flatter sections of the state. The topographic factor was strongly correlated with natural erosion potential. It is an important component to support land use planning and soil conservation practices. Regions considered to have high natural erosion potential are most commonly in the northwest (46.69% in area), north (32.7%), and west (30.05%) macro-regions.

https://doi.org/10.1590/1807-1929/agriambi.v26n9p655-661

Novel Greener Microwave-Assisted Deprotection Methodology for the 1,3-Dioxolane Ketal of Isatin Using Calix[n]arenes
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Barbosa, Lucas B.

; Silva, Tiago L. da

; Rezende, Michelle J. C.

; Silva, Bianca N. M. da

; Guzzo, Rodrigo N.

; Silva, Bárbara V.

Journal of the Brazilian Chemical Society

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May 2022, Volumen 33 Nº 5 Paginas 466 - 473

Resumen: En | Texto: En | PDF: En

In this work, the combined use of p-sulfonic acid-calix[n]arene and microwave energy to hydrolyze the 1,3-dioxolane ketal of isatin was evaluated with excellent results. This is the first time that p-sulfonic acid-calix[n]arene has been used as the catalyst in a ketal hydrolysis reaction and the deprotection of the ketone carbonyl of isatin is reported. The presence of 2.5 mol% of p-sulfonic acid-calix[4,6]arene at 160 ºC resulted in over 96% conversion of this ketal in 10 min, with the additional advantage of using water as a solvent. This catalytic system (aqueous phase containing p-sulfonic acid-calix[4]arene) was reused for five consecutive cycles, with a conversion above 96% maintained. This reusable system is not practicable using p-toluenesulfonic acid and p-hydroxybenzenesulfonic acid as catalysts since both are extracted to the organic phase with the reaction product. The hydrolysis of 1,3-dioxolane ketal of isatins with different substituents (CH3, I, Br, Cl, F, NO2) in the aromatic ring was also evaluated. The protecting group of 5-methyl-isatin was removed with 73% conversion using 2.5 mol% of p-sulfonic acid-calix[4]arene at 160 ºC for 5 min. In contrast, the ketal of 5-nitro-isatin reached 80% conversion using the same conditions after 40 min.

https://doi.org/10.21577/0103-5053.20210165

Combined effects of home advantage and match result on interactions performed by Brazilian handball players
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Trindade, Lucas N.

; Popowczak, Marek

; Jaime, Matheus de O.

; Marques, Priscila G.

; Silva, Juliano F. da

; Ueda, Lucas S.C.

; Teixeira, Dourivaldo

; Borges, Paulo H.

Motriz: Revista de Educação Física

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2022, Volumen 28 elocation e10220001622

Resumen: En | Texto: En | PDF: En

Abstract Aim: This study verified the combined effects of game result and match location on centrality measures based on the interactions of Brazilian handball players. Methods: The sample consisted of 3435 interactions performed by 15 players during 7 official Brazilian Regional Championship matches. Social network analysis was applied to investigate the following network properties: degree of centrality, closeness centrality, degree of prestige, proximity prestige, and network density. Results: Results revealed that playing at home increases closeness centrality (η2 = 0.99; p = 0.01), and network density (η2 = 1.00; p = 0.01). When the handball team lost the game, an increment in the network density in relation to the draw and win scenario was observed (η2 = 1.00; p = 0.01). It was observed that closeness centrality and network density increased when the team had lost and played at home, while when the team was playing away from home and losing, closeness centrality decreased (η2 = 0.99; p = 0.01). Conclusions: In conclusion, contextual variables impact the way that handball players interact during a match.

https://doi.org/10.1590/s1980-657420220001622

Molecular Modelling Study of Heteroarylamide/Sulfonamide Compounds with Antitrypanosomal Activity
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Souza, André L. P. F.

; Cardoso, Fábio J. B.

; Martins, Lucas S.

; Alves, Cláudio N.

; Silva, José R. A.

; Molfetta, Fábio A.

Journal of the Brazilian Chemical Society

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Ene 2021, Volumen 32 Nº 1 Paginas 83 - 97

Resumen: En | Texto: En | PDF: En

According to the World Health Organization (WHO), Chagas disease (CD), whose etiological agent is the Trypanosoma cruzi (T. cruzi) parasite, affects about eight million people, mainly in Latin America. The cruzain enzyme is highlighted among the main biological targets, since it is the most abundant of the cysteine protease class from T. cruzi and is involved in the entire life cycle of the parasite, essential in regulating the interaction between parasite and host. The drugs available for the treatment of CD usually have strong side effects, and the nitro(triazole/imidazole)-based heteroarylamide/sulfonamide compounds (HA/S) emerge with high antitrypanosomal potential. In this study, the quantitative structure-activity relationship (QSAR) were built using partial least squares (PLS) regression, and the results were robust and adequate for predicting and proposing five new derivatives according to the statistical parameters. The docking results suggest that the best-scored HA/S derivatives showed hydrogen bonds with the residuals that comprise the catalytic region of the enzyme. The molecular dynamics (MD) simulations, performed with different methods, revealed the strong stability of the compound obtained by the QSAR model of this study, in addition to a better binding free energy value than the HA/S obtained from literature.

https://doi.org/10.21577/0103-5053.20200158 332 descargas

FIRST RECORD OF Numia terebintharia GUENÉE (LEPIDOPTERA: GEOMETRIDAE) IN Ziziphus joazeiro MART. (RHAMNACEAE) IN BRAZIL
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GUEDES, ROZILEUDO DA SILVA

; FERNANDES, TEOTÔNIO LUCAS SABINO

; ZANELLA, FERNANDO CÉSAR VIEIRA

Revista Caatinga

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Ene 2021, Volumen 34 Nº 1 Paginas 236 - 241

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Geometridae é uma das famílias mais diversificadas de Lepidoptera e o conhecimento sobre a distribuição e biologia básica de suas espécies é muito limitado, restringindo-se em muitos casos à localidade-tipo. Não há nenhum inventário das espécies ocorrentes no semiárido do Nordeste do Brasil e das suas plantas hospedeiras. Neste trabalho é registrada a ocorrência da espécie Numia terebintharia Guenée em uma área de caatinga dessa região, avaliada a importância desse registro no quadro do conhecimento da distribuição das espécies do gênero e documentada a planta hospedeira de suas lagartas e as injúrias às suas folhas. Algumas árvores de Ziziphus joazeiro Mart. apresentavam cerca de 90% de suas folhas com injúrias. Esse é o primeiro registro da N. terebintharia para o Brasil e o primeiro de sua planta hospedeira.

ABSTRACT Geometridae is one of the most diverse Lepidoptera families; however, little information about Geometridae species is found, even regarding their distribution and basic biology, which are in general restricted to type locality. Lists of species and their host plants are not found for the Semiarid region of the Northeast of Brazil. The present note reports the occurrence of caterpillars of the species Numia terebintharia Guenée consuming leaves of evergreen trees of Ziziphus joazeiro Mart. in a site with xerophilous deciduous Caatinga vegetation in that region. Some trees had approximately 90% of their leaves with injuries. This is the first record of N. terebintharia caterpillars occurring in Brazil and the first record of Z. joazeiro as their host plant.

https://doi.org/10.1590/1983-21252021v34n124rc 174 descargas

10.

Seed size influences the promoting activity of rhizobia on plant growth, nodulation and N fixation in lima bean
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Costa, Claudyanne do Nascimento

; Antunes, Jadson Emanuel Lopes

; Aquino, João Pedro Alves de

; Silva, Ingrid Sthephanie da Costa

; Lopes, Angela Celis de Almeida

; Mendes, Lucas William

; Figueiredo, Marcia do Vale Barreto

; Araújo, Ademir Sergio Ferreira de

Ciência Rural

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2021, Volumen 51 Nº 3 elocation e20200246

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO: Este estudo avaliou a atividade de isolados de rizóbios inoculados em sementes pequenas (11 mm) e grandes (18 mm) sobre o crescimento, nodulação e fixação de N de feijão-fava. Isolados selecionados de rizóbios foram comparados com uma estirpe de referência CIAT899 e dois controles sem inoculação. Sementes grandes contribuíram para maior crescimento de plantas, nodulação e fixação de N do que sementes pequenas. Os isolados UFPI-59, UFPI-18 e UFPI-38 promoveram os maiores valores de massa seca de parte aérea e raízes. Os isolados UFPI-32 e UFPI-59 promoveram os maiores valores de número e massa de nódulos, respectivamente. Os isolados UFPI-38 e UFPI-59 promoveram maior acúmulo de N. Este estudo mostrou que o tamanho de sementes influencia o crescimento, nodulação e fixação de N em feijão-fava. Considerando os isolados de rizóbios, UFPI-59, UFPI-38 e UFPI-18 contribuíram para o crescimento de plantas, promoveram melhor nodulação e eficiência na fixação de N.

ABSTRACT: This study evaluated the activity of rhizobia isolates inoculated in large (18 mm) and small (11 mm) seeds on lima bean growth, nodulation and N fixation. Selected rhizobia isolates were compared with a reference strain CIAT899 and two controls without inoculation. Large seeds contributed for highest plant growth, nodulation and N fixation than small seeds. The isolates UFPI-59, UFPI-18 and UFPI-38 promoted the highest values of shoot and root dry weight, respectively. The isolates UFPI-32 promoted the highest values of nodule number, while UFPI-59 promoted the highest values of nodule dry weight. The isolates UFPI-38 and UFPI-59 promoted the highest accumulation of N. This study showed that seed size really influences lima bean growth, nodulation and BNF. Considering rhizobia isolates, UFPI-59, UFPI-38, and UFPI-18 contributed for plant growth, promoted better nodulation and effectiveness on biological N fixation.

https://doi.org/10.1590/0103-8478cr20200246 783 descargas

11.

Length-weight relationship and diet of the catfish Cambeva guareiensis (Siluriformes; Trichomycteridae)
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Ribeiro, Felipe H. N. P.

; Bonan, Maria E. P.

; Silva, José Lucas Dias da

; Azevedo-Santos, Valter M.

; Manoel, Pedro S.

; Brambilla, Eduardo M.

; Silva, Carolina V.

Biota Neotropica

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2021, Volumen 21 Nº 4 elocation e20211236

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo: A relação peso-comprimento (RPC) e dieta de um pequeno bagre trichomycterídeo, Cambeva guareiensis, foi estudada com base em 58 espécimes capturados no riacho Corrente, bacia do rio Guareí, São Paulo, Brasil. As análises de RPC mostraram valores de a variando entre 0,0097-0,0149 e de b entre 2,858-3,250. A análise da dieta mostrou que altas quantidades de insetos aquáticos (93,75% do total de itens) foram consumidas pela espécie. Além disso, não encontramos diferenças estatisticamente significativas quando comparamos a dieta entre os períodos seco e chuvoso. Nosso estudo contribui para o conhecimento da biologia populacional e ecologia alimentar de peixes trichomicterídeos em riachos brasileiros.

Abstract: The length-weight relationship (LWR) and diet of a small trichomycterid catfish, Cambeva guareiensis, was studied based on 58 specimens captured in Corrente stream, Guareí River basin, São Paulo, Brazil. LWR analyses showed values of a ranged from 0.0097 to 0.0149 and b from 2.858 to 3.250. The analysis of the diet showed that high amounts of aquatic insects (93.75% of total items) were consumed by the species. In addition, we found no statistically significant differences when comparing the diet between the dry and rainy periods. Our study contributes to the knowledge on populational biology and feeding ecology of trichomycterid fishes in Brazilian streams.

https://doi.org/10.1590/1676-0611-bn-2021-1236 173 descargas

12.

Pancreatic panniculitis in systemic lupus erythematosus and Crohn’s disease: rare event
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Silva, Lucas N. Lessa e

; Pereira, Miguel Augusto M.

; Nunes, Marcella F.

; Vilar, Enoï G.

; Pantaleão, Luciana

Jornal Brasileiro de Patologia e Medicina Laboratorial

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2021, Volumen 57 elocation e2972021

Resumen: Pt En Es | Texto: Pt En Es | PDF: Pt | PDF: En | PDF: Es

RESUMO A paniculite pancreática (PP) é uma manifestação rara de doença pancreática que acomete o tecido adiposo subcutâneo. Relatamos dois casos dessa entidade: uma paciente do sexo feminino, 37 anos, portadora de lúpus eritematoso sistêmico (LES) e uma idosa com doença de Crohn. Ambas manifestações são doenças inflamatórias crônicas autoimunes raramente relacionadas com o quadro de pancreatite aguda e que culminaram em PP. Também fizemos uma breve revisão sobre tratamento, diagnóstico e morfologia das lesões, bem como da fisiopatologia da doença. Destacamos a importância da imuno-histoquímica e da análise histopatológica de biópsias da lesão como ferramentas diagnósticas.

ABSTRACT Pancreatic panniculitis (PP) is a rare manifestation of pancreatic disease, involving subcutaneous adipose tissue. We report two cases of this entity: a 37-year-old female patient with systemic lupus erythematosus (SLE) and an elderly woman with Crohn’s disease. These are two chronic autoimmune inflammatory diseases that can be uncommonly related to acute pancreatitis and that culminates in PP. We also provide a brief review of the treatment, diagnosis and morphology of the lesions, as well as the pathophysiology of the disease. The importance of histopathological analysis of lesion biopsies is highlighted as an important diagnostic tool.

RESUMEN La paniculitis pancreática (PP) es una manifestación rara de enfermedad pancreática que afecta el tejido graso subcutáneo. Reportamos dos casos de esa entidad: una paciente del sexo femenino, 37 años, con lupus eritematoso sistémico (LES), y una anciana con enfermedad de Crohn. Ambas manifestaciones son enfermedades crónicas autoinmunes raramente relacionadas con el cuadro de pancreatitis aguda y que culminaron en PP. También hicimos una breve revisión acerca de tratamiento, diagnóstico y morfología de las lesiones, así como fisiopatología de la enfermedad. Se resalta la importancia de la inmunohistoquímica y del análisis histopatológico de biopsias de la lesión como herramientas diagnósticas.

https://doi.org/10.5935/1676-2444.20210011 257 descargas

13.

Anti-Toxoplasma gondii and anti-Neospora caninum antibodies in sheep from Paraná state, South Brazil: prevalence and associated factors
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Romanelli, Paulo Roberto

; Matos, Andressa Maria Rorato Nascimento de

; Pinto-Ferreira, Fernanda

; Caldart, Eloiza Teles

; Carmo, João Lucas Moura do

; Santos, Nathalia Gomes dos

; Silva, Natalia Ribeiro da

; Loeffler, Barbara Barcellos

; Sanches, João Fernando Zamariola

; Francisquini, Luiza Schumacher

; Romanelli, Micheline Sahyun

; Minho, Alessandro Pelegrine

; Cavalcante, Antônio Cezar Rocha

; Pierre, Elzira Jorge

; Sobezak, Claudio Cesar

; Freire, Roberta Lemos

; Mitsuka-Breganó, Regina

; Navarro, Italmar Teodorico

Revista Brasileira de Parasitologia Veterinária

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2021, Volumen 30 Nº 1 elocation e023220

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O objetivo deste estudo foi avaliar a soroprevalência e os fatores de risco associados à presença de anticorpos contra Toxoplasma gondii e Neospora caninum em ovinos do Paraná. A detecção dos anticorpos para T. gondii e N. caninum foi realizada, usando-se testes de ELISA indireto caseiro e comercial, respectivamente. A análise de regressão logística múltipla foi usada para verificar os fatores de risco associados à soroprevalência. Anticorpos anti-T. gondii e anti-N. caninum foram observados em 42,7% e em 17,6% dos animais, respectivamente. Os fatores de proteção associados à soropositividade foram “algum nível de confinamento (confinamento ou semiextensivo)” (OR=0,53) para T. gondii e “presença de mão de obra especializada” para N. caminum (OR=0,64). Os fatores de risco foram “presença de gatos” para T. gondii (OR=1,75) e “alimentação de cães com resíduos placentários” (OR=1,79) para N. caninum. Além de apresentar uma significante e simultânea soroprevalência para ambos os agentes (9,9% dos animais), os resultados também indicam que as deficiências em gestão e saneamento ambiental, a presença de reservatórios e os tipos de exploração favorecem a soropositividade. Dessa forma, estudos como estes podem auxiliar em programas sanitários e políticas públicas para a prevenção de T. gondii e N. caninum nos rebanhos ovinos do Paraná.

Abstract The aim of this study was to evaluate the seroprevalence and factors associated with the presence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies in sheep from Paraná state. The detection of antibodies for T. gondii and N. caninum was performed by homemade and commercial indirect ELISA, respectively. Multiple logistic regression analysis was used to verify the factors associated with the seroprevalence. Antibodies anti-T. gondii and anti-N. caninum were observed in 42.7% and in 17.6% of the animals, respectively. The protective factors associated to seropositive were “some level of confinement” (full or semi-extensive confinement) (OR=0.53) for T. gondii and “use of skilled labor” (OR=0.64) for N. caninum. The risk factors were “presence of cats” (OR=1.75) for T. gondii and “feeding of dogs with sheep placental remains” (OR=1.79) for N. caninum. In addition, to presenting a significant and simultaneous seroprevalence for both agents (9.9% of the animals), the results also indicate that deficiencies in management and environmental sanitation, the presence of reservoirs, and types of exploitation enhance the seropositivity. Thus, studies like this might support sanitary programs and public policies for the prevention of T. gondii and N. caninum in the sheep herds of Paraná state.

https://doi.org/10.1590/s1984-29612021021 249 descargas

14.

Persistent symptoms and decreased health-related quality of life after symptomatic pediatric COVID-19: A prospective study in a Latin American tertiary hospital
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Fink, Thais T.

; Marques, Heloisa H.S.

; Gualano, Bruno

; Lindoso, Livia

; Bain, Vera

; Astley, Camilla

; Martins, Fernanda

; Matheus, Denise

; Matsuo, Olivia M.

; Suguita, Priscila

; Trindade, Vitor

; Paula, Camila S.Y.

; Farhat, Sylvia C.L.

; Palmeira, Patricia

; Leal, Gabriela N.

; Suzuki, Lisa

; Odone Filho, Vicente

; Carneiro-Sampaio, Magda

; Duarte, Alberto José S.

; Antonangelo, Leila

; Batisttella, Linamara R.

; Polanczyk, Guilherme V.

; Pereira, Rosa Maria R.

; Carvalho, Carlos Roberto R.

; Buchpiguel, Carlos A.

; Latronico, Ana Claudia

; Seelaender, Marilia

; Silva, Clovis Artur

; Pereira, Maria Fernanda B.

; Sallum, Adriana M. E.

; Brentani, Alexandra V. M.

; Neto, Álvaro José S.

; Ihara, Amanda

; Santos, Andrea R.

; Canton, Ana Pinheiro M.

; Watanabe, Andreia

; Santos, Angélica C. dos

; Pastorino, Antonio C.

; Franco, Bernadette D. G. M.

; Caruzo, Bruna

; Ceneviva, Carina

; Martins, Carolina C. M. F.

; Prado, Danilo

; Abellan, Deipara M.

; Benatti, Fabiana B.

; Smaria, Fabiana

; Gonçalves, Fernanda T.

; Penteado, Fernando D.

; Castro, Gabriela S. F. de

; Gonçalves, Guilherme S.

; Roschel, Hamilton

; Disi, Ilana R.

; Marques, Isabela G.

; Castro, Inar A.

; Buscatti, Izabel M.

; Faiad, Jaline Z.

; Fiamoncini, Jarlei

; Rodrigues, Joaquim C.

; Carneiro, Jorge D. A.

; Paz, Jose A.

; Ferreira, Juliana C.

; Ferreira, Juliana C. O.

; Silva, Katia R.

; Bastos, Karina L. M.

; Kozu, Katia

; Cristofani, Lilian M.

; Souza, Lucas V. B.

; Campos, Lucia M. A.

; Silva Filho, Luiz Vicente R. F.

; Sapienza, Marcelo T.

; Lima, Marcos S.

; Garanito, Marlene P.

; Santos, Márcia F. A.

; Dorna, Mayra B.

; Aikawa, Nadia E.

; Litvinov, Nadia

; Sakita, Neusa K.

; Gaiolla, Paula V. V.

; Pasqualucci, Paula

; Toma, Ricardo K.

; Correa-Silva, Simone

; Sieczkowska, Sofia M.

; Imamura, Marta

; Forsait, Silvana

; Santos, Vera A.

; Zheng, Yingying

Clinics

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2021, Volumen 76 elocation e3511

Resumen: En | Texto: En | PDF: En

OBJECTIVES: To prospectively evaluate demographic, anthropometric and health-related quality of life (HRQoL) in pediatric patients with laboratory-confirmed coronavirus disease 2019 (COVID-19) METHODS: This was a longitudinal observational study of surviving pediatric post-COVID-19 patients (n=53) and pediatric subjects without laboratory-confirmed COVID-19 included as controls (n=52) was performed. RESULTS: The median duration between COVID-19 diagnosis (n=53) and follow-up was 4.4 months (0.8-10.7). Twenty-three of 53 (43%) patients reported at least one persistent symptom at the longitudinal follow-up visit and 12/53 (23%) had long COVID-19, with at least one symptom lasting for >12 weeks. The most frequently reported symptoms at the longitudinal follow-up visit were headache (19%), severe recurrent headache (9%), tiredness (9%), dyspnea (8%), and concentration difficulty (4%). At the longitudinal follow-up visit, the frequencies of anemia (11% versus 0%, p=0.030), lymphopenia (42% versus 18%, p=0.020), C-reactive protein level of >30 mg/L (35% versus 0%, p=0.0001), and D-dimer level of >1000 ng/mL (43% versus 6%, p=0.0004) significantly reduced compared with baseline values. Chest X-ray abnormalities (11% versus 2%, p=0.178) and cardiac alterations on echocardiogram (33% versus 22%, p=0.462) were similar at both visits. Comparison of characteristic data between patients with COVID-19 at the longitudinal follow-up visit and controls showed similar age (p=0.962), proportion of male sex (p=0.907), ethnicity (p=0.566), family minimum monthly wage (p=0.664), body mass index (p=0.601), and pediatric pre-existing chronic conditions (p=1.000). The Pediatric Quality of Live Inventory 4.0 scores, median physical score (69 [0-100] versus 81 [34-100], p=0.012), and school score (60 [15-100] versus 70 [15-95], p=0.028) were significantly lower in pediatric patients with COVID-19 at the longitudinal follow-up visit than in controls. CONCLUSIONS: Pediatric patients with COVID-19 showed a longitudinal impact on HRQoL parameters, particularly in physical/school domains, reinforcing the need for a prospective multidisciplinary approach for these patients. These data highlight the importance of closer monitoring of children and adolescents by the clinical team after COVID-19.

https://doi.org/10.6061/clinics/2021/e3511

15.

Ovarian hormones influence immune response to Staphylococcus aureus infection
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Souza, Clarissa Leal Silva e

; Oliveira, Hellen Braga Martins

; Santos Júnior, Manoel N.

; Silva, Mariângela de Oliveira

; Coqueiro, Igor Lopes

; Silva, Ícaro Bonyek Santos da

; Campos, Guilherme Barreto

; Silva, Robson Amaro Augusto da

; Soares, Telma de Jesus

; Oliveira, Márcio Vasconcelos de

; Timenetsky, Jorge

; Marques, Lucas Miranda

Brazilian Journal of Infectious Diseases

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Dic 2020, Volumen 24 Nº 6 Paginas 534 - 544

Resumen: En | Texto: En | PDF: En

ABSTRACT Objective: Staphylococcus aureus infections remain associated with considerable morbidity and mortality in both hospitals and the community. There is little information regarding the role of ovarian hormones in infections caused by S. aureus. The aim of this study was to evaluate the effects of ovariectomy in the immune response induced by S. aureus. Methods: Female mice BALB/c were ovariectomized (OVX) to significantly reduce the level of ovarian hormones. We also used sham-operated animals. The mice were inoculated intraperitoneally with S. aureus. Blood samples were collected for leukocyte count and bacterial quantification. The uterus and spleen were removed and weighed to calculate the uterine and splenic indexes. Lungs were removed and fractionated for immunohistochemical analysis for macrophage detection (anti-CD68) and relative gene expression of IL-6, IL-1β and TNF-α by RT-PCR. Results: Ovariectomy enlarged spleen size and generally increased circulating lymphocytes. OVX females experienced a continuation of the initial reduction of lymphocytes and a monocyte and neutrophil late response compared to shams (p ≥ 0.05). Moreover, OVX females showed neutropenia after 168 h of infection (p ≥ 0.05). Macrophage response in the lungs were less pronounced in OVX females in the initial hours of infection (p ≥ 0.01). OVX females showed a higher relative gene expression of IL-1β, IL-6 and TNF-α in the lung at the beginning of the infection compared to sham females (p ≥ 0.01). Among the uninfected females, the OVX control females showed a higher expression of IL-6 in the lung compared to the sham control females (p ≥ 0.05). In this model, the lack of ovarian hormones caused a minor increase in circulating leukocytes during the initial stage of infection by S. aureus and increased pulmonary gene expression of IL-1β, IL-6, and TNF-α. Ovariectomy alone enlarged the spleen and increased circulating lymphocytes. Ovarian hormones acted as immunoprotectors against S. aureus infection.

https://doi.org/10.1016/j.bjid.2020.10.004 338 descargas

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