Pesquisa | SciELO

Resumo O presente estudo teve como objetivo determinar as atividades antiulcerogênica e antioxidante das sementes de Psyllium (Plantago ovata Forssk) em ratos. O potencial antioxidante foi avaliado utilizando o método do sequestro do radical livre DPPH, autooxidação do β-caroteno, poder redutor de ferro e atividade de sequestro do radical hidroxila. No estudo antiulcerogênico, o pré-tratamento com o extrato etanólico das sementes de Plantago ovata (POE) (400 mg/Kg b.wt) reduziu a úlcera gástrica induzida pelo etanol em ratos, diminuindo o valor do índice de úlcera e preservando a integridade da mucosa gástrica. O estudo do estresse oxidativo nos tecidos estomacais mostrou um aumento significativo dos níveis das enzimas antioxidantes superóxido dismutase, catalase e glutationa peroxidase, com uma diminuição significativa da peroxidação lipídica enquanto pré-tratamento com POE. Em conclusão, o POE protege contra úlcera gástrica devido aos seus potenciais antioxidantes e à presença de moléculas bioativas.

Abstract This study aimed to determine the antiulcerogenic and antioxidant activities of Psyllium (Plantago ovata Forssk) seed ethanolic extract in rats. We assessed the antioxidant potential using free radical scavenging on DPPH, β-carotene bleaching activity, ferric reducing power, and hydroxyl radical scavenging activity. In the antiulcerogenic study, pre-treatment with Plantago ovata seeds ethanolic extract (POE) (400 mg/kg b.wt) significantly protected against ethanol-induced gastric ulcer in rats by decreasing the ulcer index value and preserving the integrity of the gastric mucosa. The oxidative stress status in the stomach tissues showed a significant increase in the antioxidant enzyme levels of superoxide dismutase, catalase, and glutathione peroxidase with a significant decrease in lipid peroxidation during pre-treatment with POE. In conclusion, the POE protects against gastric ulcer due to its antioxidant potential and presence of bioactive molecules.

https://doi.org/10.1590/1519-6984.255120

Advances in Breast Cancer Drug Discovery: A Review of Therapeutic Strategies and Studies Involving Photosensitizers, Caged Xanthones and Thiosemicarbazones Derivatives Discovery Photosensitizers
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Oliveira, Douglas D. S.

; Lapierre, Thibault J. W. Jacques Dit

; Silva, Fernanda C.

; Cunha, Ieda V.

; Souza, Rafael A. C.

; Matos, Patrícia A.

; Almeida, Gustavo M.

; Oliveira, Carolina G.

; Araújo, Thaise G.

; Tsubone, Tayana M.

; Rezende Jr., Celso O.

Journal of the Brazilian Chemical Society

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2024, Volume 35 Nº 1 elocation e-20230128

Resumo: En | Texto: En | PDF: En

Cancer is one of the major causes of death worldwide, and breast cancer is the most prevalent and deadly type among women. Despite the side effects and the phenomena of chemoresistance associated with the drugs involved, chemotherapy remains the main therapeutic strategy to combat and control breast cancer. Therefore, several new classes of compounds against breast cancer have been explored, in an effort to identify new drug candidates with alternative mechanisms of action. The principal results of such exploration, focusing on caged xanthones, thiosemicarbazones and photosensitizers, are presented in this review, along with the main aspects of the drug discovery process against breast cancer. More specifically, the design, structure-activity relationship investigations and anti-breast cancer properties of these three classes are described and discussed in this work. worldwide women involved Therefore explored action exploration xanthones photosensitizers review specifically design structureactivity structure activity antibreast anti work

https://doi.org/10.21577/0103-5053.20230128

Climate control in the feeding area for Girolando cows: Effects on environmental and production variables
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Sousa, Lainny J. M. P. e

; Passini, Roberta

; Almeida, Eduardo A. de

; Amaral, Alliny das G.

Revista Brasileira de Engenharia Agrícola e Ambiental

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Dez 2023, Volume 27 Nº 12 Páginas 973 - 979

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

ABSTRACT High-production cows require facilities providing comfortable environments to enhance production efficiency and sustain milk quality. This study evaluated the impact of climatizing the feeding area post-morning and afternoon milking on environmental variables, thermal comfort indices, and the yield and quality of milk in lactating Girolando cows. The experiment followed a 4 × 4 Latin square design with four treatments across four experimental periods, using four cows per treatment. The post-milking climate control treatments included: shading; shading + ventilation; shading + ventilation + shower; and an evaporative adiabatic cooling system. The evaporative adiabatic cooling system proved most effective in maintaining thermal conditions near the comfort level for dairy cows, as indicated by lower thermal comfort indices. This system also enhanced morning and overall milk production. However, the climate control systems did not significantly affect the contents of protein, fat, or lactose in the milk.

RESUMO As vacas de alta produção necessitam de instalações que ofereçam ambientes amenos, para que ocorra aumento da sua eficiência produtiva e manutenção da qualidade do leite. Dessa forma, esse trabalho objetivou avaliar a influência da climatização da área de alimentação após o período das ordenhas matutina e vespertina sobre as variáveis ambientais, índices de conforto térmico, produtividade e qualidade do leite de vacas girolando em lactação. Foi utilizado o delineamento em quadrado latino 4 × 4, com quatro tratamentos e quatro períodos experimentais, com quatro animais por tratamento, totalizando 16 repetições. Os tratamentos foram os sistemas de climatização na pós-ordenha: sombreamento; sombreamento + ventilação; sombreamento+ ventilação+ ducha e sistema de resfriamento adiabático evaporativo. O sistema de resfriamento adiabático evaporativo aumenta a produção leiteira na ordenha da manhã e na produção total. Os teores de proteína, gordura e lactose não foram influenciados pelos sistemas de climatização estudados.

https://doi.org/10.1590/1807-1929/agriambi.v27n12p973-979

Long-term oncological and surgical outcomes after Video Endoscopic Inguinal Lymphadenectomy (VEIL) in patients with penile cancer
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Tobias-Machado, Marcos

; Ornellas, Antonio A.

; Hidaka, Alexandre K.

; Medina, Luis G.

; Mattos, Pablo A. L.

; Besio, Ruben S.

; Abreu, Diego

; Castro, Pedro R.

; Nishimoto, Ricardo H.

; Astigueta, Juan

; Dourado, Aurus

; Machado, Roberto D.

; Magnabosco, Wesley J.

; Corona-Montes, Victor

; Villoldo, Gustavo M.

; Zampolli, Hamilton C.

; Taha, Anis

; Auad, Pericles R.

; Faria, Eliney F.

; Arantes, Paulo B. O.

; Tavares, Alessandro

; Nascimento, Francisco S. M. S.

; Brazão Jr., Eder S.

; Rocha, Maurício M.

; Costa, Walter H.

; Panico, Vinicius

; Reis, Leonardo O.

; Almeida-Carrera, Roberto J.

; Silva, Rafael C.

; Zequi, Stênio C.

; Calixto, José R. R.

; Sotelo, Rene

International braz j urol

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Out 2023, Volume 49 Nº 5 Páginas 580 - 589

Resumo: En | Texto: En | PDF: En

ABSTRACT Objective: To report outcomes from the largest multicenter series of penile cancer patients undergoing video endoscopic inguinal lymphadenectomy (VEIL). Materials and Methods: Retrospective multicenter analysis. Authors of 21 centers from the Penile Cancer Collaborative Coalition-Latin America (PeC-LA) were included. All centers performed the procedure following the same previously described standardized technique. Inclusion criteria included penile cancer patients with no palpable lymph nodes and intermediate/high-risk disease and those with non-fixed palpable lymph nodes less than 4 cm in diameter. Categorical variables are shown as percentages and frequencies whereas continuous variables as mean and range. Results: From 2006 to 2020, 210 VEIL procedures were performed in 105 patients. Mean age was 58 (45-68) years old. Mean operative time was 90 minutes (60-120). Mean lymph node yield was 10 nodes (6-16). Complication rate was 15.7%, including severe complications in 1.9% of procedures. Lymphatic and skin complications were noted in 8.6 and 4.8% of patients, respectively. Histopathological analysis revealed lymph node involvement in 26.7% of patients with non-palpable nodes. Inguinal recurrence was observed in 2.8% of patients. 10y- overall survival was 74.2% and 10-y cancer specific survival was 84.8%. CSS for pN0, pN1, pN2 and pN3 were 100%, 82.4%, 72.7% and 9.1%, respectively. Conclusion: VEIL seems to offer appropriate long term oncological control with minimal morbidity. In the absence of non-invasive stratification measures such as dynamic sentinel node biopsy, VEIL emerged as the alternative for the management of non-bulky lymph nodes in penile cancer.

https://doi.org/10.1590/s1677-5538.ibju.2023.0065

Cultivation of chicory under nutrient solutions prepared in brackish waters and applied at different temperatures
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Oliveira, Tarcísio F. de

; Santos Júnior, José A.

; Silva, Mairton G. da

; Gheyi, Hans R.

; Almeida, Júlio C. de

; Guiselini, Cristiane

Revista Brasileira de Engenharia Agrícola e Ambiental

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Set 2023, Volume 27 Nº 9 Páginas 719 - 728

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

ABSTRACT The cooling of nutrient solutions prepared in brackish water can have several implications for plants grown in hydroponics. In this context, the present study aimed to evaluate the effects of temperature and salinity stresses in the root zone on the growth, water status, production, and leaf characteristics of chicory cultivar Folha Larga, exposed to four values of electrical conductivity of nutrient solution - ECns (1.7, 3.2, 4.7, and 6.2 dS m-1), applied at two temperatures (ambient temperature and controlled in the range between 25-30 °C). The randomized block design arranged in a 4 × 2 factorial scheme with four replications was used. Cooling nutrient solution mitigated effects of salinity on stem height and diameter, number of leaves, and leaf area of chicory; provided greater production and water consumption, stability into root-shoot relationships, and membrane integrity within the saline range studied (1.7 to 6.2 dS m-1).

RESUMO O resfriamento de soluções nutritivas preparadas em águas salobras pode ter diversas implicações sobre as plantas cultivadas em hidroponia. Nesse contexto, o presente estudo teve como objetivo de avaliar os efeitos dos estresses de temperatura e salinidade na zona radicular sobre o crescimento, estado hídrico, produção e características foliares do almeirão, cultivar Folha Larga, exposto a quatro valores de condutividade elétrica da solução nutritiva - CEsn (1,7; 3,2; 4,7 e 6,2 dS m-1), aplicado em duas temperaturas (ambiente e controlada na faixa entre 25-30 °C). Foi adotado o esquema fatorial 4 × 2 em blocos casualizados, com quatro repetições. O resfriamento da solução nutritiva mitigou os efeitos da salinidade sobre a altura e diâmetro do caule, número de folhas e área foliar do almeirão; proporcionou maior produção e consumo hídrico, estabilidade na relação raiz parte aérea e integridade da membrana, no intervalo salino estudado (1,7 a 6,2 dS m-1).

https://doi.org/10.1590/1807-1929/agriambi.v27n9p719-728

Clinical and Urodynamic results of the Argus T® sling in moderate and severe male stress urinary incontinence after radical prostatectomy – a 5 year prospective study.
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Carvalho, Adilson P.

; Silva, André B.

; Lebani, Bruno R.

; Pinto, Eduardo R.

; Felipe, Mariana R.

; Skaf, Milton

; Girotti, Marcia E.

; Zequi, Stenio C.

; Sacomani, Carlos A. R.

; Almeida, Fernando G.

International braz j urol

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Ago 2023, Volume 49 Nº 4 Páginas 452 - 461

Resumo: En | Texto: En | PDF: En

ABSTRACT Purpose: Sling as a therapeutic option for male stress urinary incontinence (SUI) has been reviewed in the last two decades, as it is a relatively simpliest surgery compared to artificial urinary sphincter and has the ability to modulate urethral compression. This study aims to evaluate the efficacy, rate of complications, quality of life and the effects on bladder emptying of the Argus T® compressive and ajustable sling in moderate and severe male SUI treatment. Materials and Methods: Men eligible for stress urinary incontinence treatment after radical prostatectomy were recruited and prospectively evaluated, from March 2010 to November 2016. It was selected outpatient men with moderate and severe SUI, after 12 months of radical prostatectomy, who have failed conservative treatment. All patients had a complete clinical and urodynamic pre and post treatment evaluation, by means of clinical history, physical examination, urine culture, 1-hour pad test and ICIq-SF questionnaire. The UDS was performed after 12, 18 and 24 months postoperatively. Results: Thirty-seven men underwent sling surgery, 19 patients (51.4%) with moderate and 18 (48.6%) with severe SUI. The minimum follow-up time was 5 years. Overall, we had a success rate of 56.7% at 60 months follow-up. After surgery, we did not observe significant changes in the urodynamic parameters evaluated during the follow-up. No patient had urodynamic bladder outlet obstruction (BOO) after sling implantation. Readjustment of the Argus T® sling was performed in 16 (41%) of the patients and 51% of the patients reported some adverse event. Conclusion: We demonstrate a long-term efficacy and safety of Sling Argus T® as an alternative to moderate and severe male SUI treatment. Furthermore, in our study bulbar urethra compression does not lead to bladder outlet obstruction.

https://doi.org/10.1590/s1677-5538.ibju.2023.0003

Sufficient Conditions for Existence of the LU Factorization of Toeplitz Symmetric Tridiagonal Matrices
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ALMEIDA, C. G.

; REMIGIO, S. A. E.

Trends in Computational and Applied Mathematics

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Mar 2023, Volume 24 Nº 1 Páginas 177 - 190

Resumo: En | Texto: En | PDF: En

ABSTRACT The characterization of inverses of symmetric tridiagonal and block tridiagonal matrices and the development of algorithms for finding the inverse of any general non-singular tridiagonal matrix are subjects that have been studied by many authors. The results of these research usually depend on the existence of the LU factorization of a non-sigular matrix A, such that A = LU . Besides, the conditions that ensure the nonsingularity of A and its LU factorization are not promptly obtained. Then, we are going to present in this work two extremely simple sufficient conditions for existence of the LU factorization of a Toeplitz symmetric tridiagonal matrix A. We take into consideration the roots of the modified Chebyshev polynomial, and we also present an analysis based on the parameters of the Crout’s method.

https://doi.org/10.5540/tcam.2022.024.01.00177

Factors associated with oral health related-quality of life in preschoolers from an Andean community
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Huamán Mendoza, Aldrin A.

; Pinedo Tellez, Karen S.

; Rodrigues de Almeida Silva, Carla

; Tello Guerrero, Yvette G.

; Calle Lopez, Patricia

; García Rupaya, Carmen R.

; Valdez Jurado, Freddy R.

Revista Estomatológica Herediana

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Jan 2023, Volume 33 Nº 1 Páginas 26 - 33

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

ABSTRACT Objective : To analyze the oral health status and its relationship with the quality of life of Andean children of the community of Paucarbamba in Huancavelica, Peru. Material and Methods : The observational, cross-sectional, and correlational study was conducted on a sample of 120 children aged 3-5 years. Early childhood caries was considered using the dmft index. In addition, presence and type of malocclusion were assessed. The oral health-related quality of life was measured by The Early Childhood Oral Health Impact Scale (ECOHIS) questionnaire. Univariate and bivariate analysis were performed. Linear regression and Spearman correlation were conducted to identify the factors that most explained the ECOHIS score. Results : Multiple linear regression by least squares method did not consider gender, age, malocclusion, and simplified oral hygiene index as significant. This analysis only included dmft index as significant (p<0.05) to explicate the ECOHIS score. The estimated regression model was ECOHIS score = 11.67 + 0.79*dmft, in which the score increased by 0,79 for each unit obtained of the dmft index, and the dmft in a R2 = 30% (p<0.001) explained the variability of the ECOHIS score achieved. Conclusions : There is a negative impact of dental caries on the quality of life of preschool children and their families in an Andean community in Paucarbamba, Peru.

RESUMEN Objetivo : Analizar el estado de salud bucal y su relación con la calidad de vida de los preescolares de una comunidad andina y vulnerable del Perú. Material y Métodos : El estudio observacional, correlacional y transversal se realizó en una muestra de 120 niños de 3 a 5 años. La caries de la primera infancia se determinó mediante el índice ceod. También se consideró la presencia y el tipo de maloclusión. El cuestionario Early Childhood Oral Health Impact Scale (ECOHIS) midió la calidad de vida relacionada con la salud bucal. Los factores y variables orales se analizaron de manera univariada y bivariada. Se realizó un análisis de correlación de Spearman y regresión lineal para identificar los factores y en qué medida explicaban la puntuación del cuestionario. Resultados : El análisis de regresión lineal múltiple por el método de mínimos cuadrados solo incluyó como significativa (p <0,05) la contribución de ceod para explicar la puntuación del cuestionario, dejando de lado variables como el sexo, la edad, la maloclusión y el índice de higiene bucal simplificado. El modelo de regresión estimado fue Puntuación del Cuestionario = 11,67 + 0,79*ceod, donde la puntuación del cuestionario aumentó en 0,79 por cada unidad ganada de ceod, y la variabilidad de las puntuaciones obtenidas se explica por el ceod en un R2 = 30% (p<0,001). Conclusiones : Existe un impacto de la caries dental en la calidad de vida de los preescolares de uma comunidade andina del Perú y sus familias.

https://doi.org/10.20453/reh.v33i1.4431

10.

Evaluation of antioxidant, photoprotective and antinociceptive activities of Marcetia macrophylla extract: potential for formulation of sunscreens
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Costa, S. C. C.

; Damasceno, P. K. F.

; Lima, R. G. G.

; Botura, M. B.

; Branco, C. R. C.

; Silva, T. R. S.

; Oliveira, A. P.

; Guimarães, A. L.

; Almeida, J. R.G.S.

; Branco, A.

Brazilian Journal of Biology

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2023, Volume 83 elocation e246312

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O extrato bruto de Marcetia macrophylla mostrou atividade antioxidante, fotoprotetora e antinociceptiva, sendo em seguida investigado como ingrediente ativo em uma formulação fotoprotetora. Assim, o extrato de M. macrophylla apresentou atividade antioxidante com IC50 de 3,43 mg/mL (teste de sequestro do DPPH∙) e Fator de Proteção Solar de 20,25 (FPS/UV-B, 250 µg/mL) e UV-A de 78,09% (teste de fotobranqueamento do trans-resveratrol). A atividade antinociceptiva usando o teste in vivo de contorções abdominais induzidas por ácido acético foi superior a todos os padrões testados (99,14% na dose de 200 mg/Kg). A análise por cromatografia líquida de alta eficiência acoplada a detector de fotodiodos e espectroscopia de massas multi-estágio (CLAE-DAD-EM/EM) possibilitou a caracterização dos flavonoides quercetina-3-O-hexosídeo, quercetina-3-O-pentosídeo e quercetina-3-O-desoxihexosídeo. A formulação farmacêutica contendo o extrato ativo bruto de Marcetia macrophylla foi preparada e os testes físico-químicos (características organolépticas, análise de pH e centrifugação), o UVB in vitro (fator de proteção solar, FPS) e UVA (β-caroteno) foram investigados. A formulação apresentou resultados satisfatórios frente aos parâmetros físico-químicos avaliados e ativos contra UV. Assim, M. macrophylla apresentou atividades biológicas com potencial uso em preparações fitofarmacêuticas.

Abstract The antioxidant, photoprotective and antinociceptive Marcetia macrophylla active extract was investigated as an active ingredient in a sunscreen cream formulation. Thus, the M. macrophylla extract showed IC50 of 3.43 mg/ml of the antioxidant (DPPH∙ scavenging test) and Sun Protection Factor of 20.25 (SPF/UV-B, at 250 µg/ml) and UV-A of 78.09% (photobleaching trans-resveratrol test). The antinociceptive activity was superior to all standards tested using the in vivo acetic acid-induced writhing test (99.14% at the dose of 200 mg/kg) and the high-performance liquid chromatography coupled with diode array detector and mass spectroscopy multi-stage (HPLC-DAD-MS/MS) enabled the structural characterization of the quercetin-3-O-hexoside, quercetin-3-O-pentoside and quercetin-3-O-desoxihexoside. The pharmaceutical formulation containing the Marcetia macrophylla crude active extract was prepared and the physicochemical tests (organoleptic characteristics, pH analysis and centrifugation), the in vitro UVB (sun protection factor, SPF) and UVA (β-carotene) using the spectroscopic method were investigated. The formulation showed satisfactory results concerning the physicochemical parameters evaluated and active against the UV test. Thus, M. macrophylla showed biological activities with potential use in pharmaceutical preparations.

https://doi.org/10.1590/1519-6984.246312 183 downloads

11.

Woody species distribution across a savanna-dry forest soil gradient in the Brazilian Cerrado
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Paula, G. A.

; Fischer, E.

; Silveira, M.

; Almeida, H.

; van den Berg, E.

Brazilian Journal of Biology

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2023, Volume 83 elocation e243245

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Embora a distribuição e a riqueza em espécies arbóreas nas fitofisionomias do Cerrado venham sendo bastante estudadas, a transição entre savanas e florestas deciduais ainda não foi abordada. Investigamos o efeito de características físico-químicas do solo sobre a distribuição de espécies arbóreas em região de contato entre cerrado sentido restrito e floresta estacional decidual (FED). As espécies arbóreas foram amostradas sistematicamente, e variáveis de topografia e características do solo foram medidas em 30 parcelas de 10×40 m, sendo 15 parcelas em cada fisionomia. A distribuição das espécies arbóreas foi espacialmente estruturada, e as características do solo diferiram entre as áreas de cerrado sentido restrito e FED, principalmente relacionadas à saturação de alumínio, saturação de bases e teores de fósforo. A saturação de alumínio aumentou em direção ao cerrado sentido restrito, enquanto a saturação de bases aumentou em direção à FED. A maioria das espécies arbóreas predominou em uma das fisionomias, como Callisthene major em cerrado sentido restrito e Anadenanthera colubrina em FED. Apenas 20% das espécies foram amplamente distribuídas em ambas as fisionomias ou, em poucos casos, restritas aos valores intermediários do gradiente de solo. Os resultados indicam um forte contraste de características do solo entre o cerrado sentido restrito e a FED, assim como uma transição acentuada e espacialmente organizada quanto à distribuição de espécies arbóreas.

Abstract Although richness and distribution of woody species in the Cerrado physiognomies have been extensively studied, the shifts of woody species from savanna physiognomies to dry forests have not yet been addressed. Here, we investigate the effect of soil physical-chemical traits on the woody species turnover between adjacent cerrado stricto sensu and dry forest physiognomies. Woody species were surveyed, and soil and topographic variables measured, in 30 10×40 m plots systematically distributed, with 15 plots in each physiognomy. We found a spatially structured distribution of woody species, and differences of soil traits between cerrado stricto sensu and dry forest areas, mainly related to the aluminum saturation, base saturation, and available phosphorus. Aluminum saturation increased toward the savanna area, while base saturation increased toward the dry forest. Most woody species predominated in one physiognomy, such as Callisthene major in the cerrado stricto sensu and Anadenanthera colubrina in the dry forest. Only 20% of the species were widely distributed across both physiognomies or, not often, restricted to the intermediary values of the soil gradient. General results indicate that contrasting soil traits between cerrado stricto sensu and dry forest produce a strongly spatially organized and sharp transition in terms of species distribution between these physiognomies.

https://doi.org/10.1590/1519-6984.243245 1194 downloads

12.

Seed dispersal of the palm Acrocomia aculeata by the Blue-and-Yellow Macaw (Ara ararauna)
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Silva, L. B.

; Pereira, G. A.

; Passos Filho, P. B.

; Almeida, N. M.

Brazilian Journal of Biology

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2023, Volume 83 elocation e244697

Resumo: En | Texto: En | PDF: En

https://doi.org/10.1590/1519-6984.244697 504 downloads

13.

The amygdala lesioning due to status epilepticus – Changes in mechanisms controlling chloride homeostasis
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Santos, Luiz E.C.

; Almeida, Antônio-Carlos G.

; Silva, Sílvia C.B.

; Rodrigues, Antônio M.

; Cecílio, Samyra G.

; Scorza, Carla A.

; Finsterer, Josef

; Moret, Marcelo

; Scorza, Fulvio A.

Clinics

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2023, Volume 78 elocation 100159

Resumo: En | Texto: En | PDF: En

Objective: Amygdala has been demonstrated as one of the brain sites involved in the control of cardiorespiratory functioning. The structural and physiological alterations induced by epileptic activity are also present in the amygdala and reflect functional changes that may be directly associated with a sudden unexpected death. Seizures are always associated with neuronal damage and changes in the expression of cation-chloride cotransporters and Na/K pumps. In this study, the authors aimed to investigate if these changes are present in the amygdala after induction of status epilepticus with pilocarpine, which may be directly correlated with Sudden Unexpected Death in Epilepsy (SUDEP). Methods: Pilocarpine-treated wistar rats 60 days after Status Epilepticus (SE) were compared with control rats. Amygdala nuclei of brain slices immunostained for NKCC1, KCC2 and α1-Na+/K+-ATPase, were quantified by optical densitometry. Results: The amygdaloid complex of the animals submitted to SE had no significant difference in the NKCC1 immunoreactivity, but KCC2 immunoreactivity reduced drastically in the peri-somatic sites and in the dendritic-like processes. The α1-Na+/K+-ATPase peri-somatic immunoreactivity was intense in the rats submitted to pilocarpine SE when compared with control rats. The pilocarpine SE also promoted intense GFAP staining, specifically in the basolateral and baso-medial nuclei with astrogliosis and cellular debris deposition. Interpretation: The findings revealed that SE induces lesion changes in the expression of KCC2 and α1-Na + /K + -ATPase meaning intense change in the chloride regulation in the amygdaloid complex. These changes may contribute to cardiorespiratory dysfunction leading to SUDEP.

https://doi.org/10.1016/j.clinsp.2022.100159

14.

xButyagrus nabonnandii (Prosch.) Vorster (Arecaceae): a sterile and rare palm with variable morphology?
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Rosa, L. Z.

; Sant’Anna-Santos, B. F.

; Almeida, C. G. M.

; Kuhn, S. A.

; Hüther, C. M.

; Souza, V. Q.

Brazilian Journal of Biology

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2023, Volume 83 elocation e271366

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract ×Butyagrus nabonnandii (Prosch.) Vorster is known as mule palm due to sterility, but recently, its pollen has been successfully used in backcrosses. It was first described as an artificial cross between Syagrus romanzoffiana (Cham.) Glassman and Butia odorata (Barb.Rodr.) Noblick in 1890. It has been considered rare in nature, and its morphology has been little studied. Thus, we aimed to verify if ×B. nabonnandii is sterile by studying its morphology and seed germination from different natural populations. The hybrid was sampled in four municipalities and is new to three of these. In one of the visited cities, 20 specimens were counted. The vegetative morphology showed less variation than the reproductive. However, part of the vegetative characters differed from previous descriptions relying solely on cultivated specimens. Contrary to previous reports, our data indicate that ×Butyagrus nabonnandii is neither rare nor infertile. Seed germination rates of ×B. nabonnandii are low due to seed predation by beetle larvae and seedless fruit production, which is also observed in the genera of the parental species. Furthermore, as in its parents, the morphology of the hybrid is complex, and future anatomical and molecular approaches are important for a better delimitation and understanding of the biology of ×B. nabonnandii.

Resumo ×Butyagrus nabonnandii (Prosch.) Vorster é conhecida como palmeira-mula por ser considerada estéril, apesar de ter sido utilizada com sucesso em retrocruzamentos. O híbrido resulta do cruzamento entre Syagrus romanzoffiana (Cham.) Glassman e Butia odorata (Barb.Rodr.) Noblick, é tido como raro e possui morfologia pouco estudada. Objetivou-se estudar a morfologia de ×B. nabonnandii e verificar sua esterilidade através da germinação de suas sementes a partir de diferentes populações naturais. O híbrido foi registrado em quatro municípios sendo, em três desses, de ocorrência inédita. Em um dos municípios visitados, foram contabilizados 20 espécimes. A morfologia vegetativa apresentou menor variação do que a reprodutiva. Entretanto, parte dos caracteres morfológicos vegetativos diferem do descrito na literatura para espécimes cultivados. Nossos dados indicam que além de não ser raro, o híbrido é fértil. As taxas de germinação das sementes de ×B. nabonnandii são baixas devido à predação das sementes por larvas de besouros, além da produção de frutos sem sementes, o que também ocorre nos gêneros das espécies progenitoras. Além disso, assim como em seus parentais, a morfologia do híbrido é complexa, sendo importantes futuros estudos anatômicos e moleculares para uma melhor delimitação e compreensão da biologia de ×B. nabonnandii.

https://doi.org/10.1590/1519-6984.271366

15.

Effectiveness of Federal Protected Areas in the Preservation of Mangrove Forests on the Coast of the State of Paraíba, Brazil
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MEDEIROS, IARA S.

; SANTOS, SEBASTIÃO S.

; REBELO, VANESSA A.

; ALMEIDA, ISIS C.

; VELOSO, THALMA MARIA G.

; ALMEIDA, NADJACLEIA V.

; BORGES, JOÃO C.G.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Nº 1 elocation e20211079

Resumo: En | Texto: En | PDF: En

Abstract This study evaluated the effectiveness of Federal Protected Areas on the coast of the state of Paraíba in northeastern Brazil with regard to the preservation of mangrove forests. The study area encompassed remaining mangrove forests distributed in four federal protected areas (PAs) located in Paraíba: Area of Relevant Ecological Interest (AREI) of Mangroves of the Mamanguape River, Environmental Protection Area (EPA) of the Mamanguape River, the Restinga de Cabedelo National Forest (NATFOR), and the Acaú-Goiana Extractive Reserve (EXTRES). The methods consisted of a spatiotemporal analysis considering the year of creation of each PA, with mapping and quantification as well as the assessment of impacts and effectiveness. NATFOR and EXTRES had the most conserved mangrove areas on the temporal scale, whereas AREI and EPA had the largest reductions in areas of mangrove forest. Urban expansion, sugarcane monoculture, and shrimp farming represented the main negative impacts spatially identified in these PAs. Based on the results of this study, the mangrove forests analyzed have continually suffered anthropogenic pressures since their creation as protected areas. The greatest effectiveness in the preservation of mangrove forests was found in Acaú-Goiana EXTRES and the least effectiveness was found in the AREI of Mangroves of the Mamanguape River.

https://doi.org/10.1590/0001-3765202320211079

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