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1.
Article in English | LILACS-Express | LILACS | ID: biblio-1535335

ABSTRACT

Introduction: The conditions of teachers' work during the COVID-19 pandemic affected teachers' lives regarding voice disorder and stress, even in emergency remote classroom situation. Objective: To analyze the relationship between the presence of voice disorder, job stress, and COVID-19 in teachers when in emergency remote classroom teaching situation at the time of the pandemic. Method: This is a primary, exploratory, observational cross-sectional study with the use of survey forwarded online during the period of emergency classes after the arrival of COVID-19 pandemic in Brazil. The teachers answered the sociodemographic questions about the presence of COVID-19 and the following instruments: Condition of Vocal Production-Teacher [Condição de Produção Vocal - Professor (CPV-P)], Screening Index for Voice Disorder (SIVD), and Job Stress Scale (JSS). Results: Of the 118 teachers analyzed, 94.1% were female; the average age was 44 years. The SIVD recorded the presence of voice disorder in 66.9% of the participants. Regarding the JSS, which are the findings related to stress at work in the demand domain, the teachers showed high levels, a fact which presupposes the existence of pressure of psychological nature to perform their work. Conclusion: The teachers self-reported the presence of voice disorder even in remote class situation, on the occasion of COVID-19, which were more common in older teachers. When comparing the presence of voice disorders, coronavirus symptoms, and stress domains in relation to demand, control, and social support, there was no significance. It is hoped that this study will help to reflect on the need to improve teachers' working conditions, strengthening work-related voice disorder actions and guiding actions for vocal care and well-being.


Introducción: Las condiciones de trabajo de los profesores durante la pandemia de COVID-19 afectaron sus vidas en lo que respecta al trastorno de la voz y el estrés, incluso en situaciones de emergencia en aulas remotas. Objetivo: Analizar la relación entre la presencia de trastorno de la voz, estrés laboral y COVID-19 en profesores cuando se encontraban en situación de emergencia de enseñanza en aulas remotas en la época de la pandemia. Método: Se trata de un estudio primario, exploratorio, observacional de tipo transversal, con el uso de encuesta remitida online durante el periodo de clases de emergencia tras la llegada de la pandemia de COVID-19 en Brasil. Los profesores respondieron a las preguntas sociodemográficas sobre la presencia de COVID-19 y a los siguientes instrumentos: Condición de Producción Vocal-Profesor (CPV-P), Índice de Detección de los Trastornos de la Voz (SIVD) y Escala de Estrés Laboral (JSS). Resultados: De los 118 profesores analizados, el 94,1% eran mujeres; la mediana de edad era de 44 años. El (SIVD) registró la presencia de trastorno de la voz en el 66,9% de los participantes. En cuanto a la JSS, que son los hallazgos relacionados con el estrés laboral en el dominio de la demanda, los profesores mostraron niveles elevados, hecho que presupone la existencia de presiones de naturaleza psicológica para realizar su trabajo. Conclusión: Los profesores autoinformaron de la presencia de trastornos de la voz incluso en situación de clase a distancia, con ocasión del COVID-19, que fueron más frecuentes en los profesores de más edad. Al comparar la presencia de trastornos de la voz, los síntomas del coronavirus y los dominios de estrés en relación con la demanda, el control y el apoyo social, no hubo resultados significativos. Se espera que este estudio ayude a reflexionar sobre la necesidad de mejorar las condiciones de trabajo de los docentes, fortaleciendo las acciones de Trastorno de la voz relacionado con el trabajo (WRVD) y orientando acciones para el cuidado y bienestar vocal.

2.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1535337

ABSTRACT

Introducción: En modelos de producción vocal que emplean estructuras de resorte-masa-amortiguador, la precisión en la determinación de coeficientes de amortiguamiento que se asemejen a las características fisiológicas de las cuerdas vocales es crucial, teniendo en cuenta posibles variaciones en la representación de la viscoelasticidad. Objetivo: Este estudio tiene como objetivo realizar un ajuste paramétrico de un modelo de producción vocal basado en un sistema de resorte-masa-amortiguador que incorpora interacción con la presión subglótica, con el fin de modelar de manera precisa las fuerzas de colisión ejercidas por las cuerdas vocales durante la fonación. Método: Se utilizó un algoritmo de búsqueda metaheurística para la síntesis paramétrica. El algoritmo se aplicó a los coeficientes de elasticidad c1 y c2, así como a los coeficientes de amortiguamiento ε1 y ε2, que se correlacionan directamente con las matrices de masa del modelo. Esto facilita el ajuste de la composición de las cuerdas para lograr un comportamiento fisiológico deseado. Resultados: El comportamiento del sistema vocal para cada ciclo de simulación se comparó con un estándar predefinido en condiciones normales. El algoritmo determinó el punto final de la simulación evaluando las discrepancias entre características clave de las señales obtenidas y las deseadas. Conclusión: El ajuste paramétrico permitió la aproximación del comportamiento fisiológico de la producción vocal, proporcionando estimaciones de las fuerzas de impacto experimentadas por las cuerdas vocales durante la fonación.


Introduction: In vocal production models employing spring-mass-damper frameworks, precision in determining damping coefficients that align with physiological vocal fold characteristics is crucial, accounting for potential variations in the representation of viscosity-elasticity properties. Objective: This study aims to conduct a parametric fitting of a vocal production model based on a mass-spring-damper system incorporating subglottic pressure interaction, with the purpose of accurately modeling the collision forces exerted by vocal folds during phonation. Method: A metaheuristic search algorithm was employed for parametric synthesis. The algorithm was applied to elasticity coefficients c1 and c2, as well as damping coefficients ε1 and ε2, which directly correlate with the mass matrices of the model. This facilitates the adjustment of fold composition to achieve desired physiological behavior. Results: The vocal system's behavior for each simulation cycle was compared to a predefined standard under normal conditions. The algorithm determined the simulation endpoint by evaluating discrepancies between key features of the obtained signals and the desired ones. Conclusion: Parametric fitting enabled the approximation of physiological vocal production behavior, providing estimates of the impact forces experienced by vocal folds during phonation.

3.
J. bras. nefrol ; 46(2): e20230043, Apr.-June 2024. graf
Article in English | LILACS-Express | LILACS | ID: biblio-1550487

ABSTRACT

Abstract Introduction: Glyphosate is the most widely used herbicide worldwide and in Brazil. There is currently increasing concern about the effects of glyphosate on human health. The Brazilian Institute for Consumer Protection showed data on the presence of glyphosate in some of Brazil's most consumed ultra-processed products. Currently, regulations on the upper limit for these residues in ultra-processed foods have yet to be established by the National Health Surveillance, and ultra-processed food consumption is independently associated with an increased risk of incident chronic kidney disease. Methods: Since an unbalanced diet can interfere with kidney function, this study aims to investigate the effect of daily intake of 5 mg/kg bw glyphosate in conjunction with a balanced diet and the possible impact on renal function in rats. Kidney function, kidney weight, markers of renal injury, and oxidative stress were evaluated. Results: There was a decrease in kidney weight. The main histopathological alterations in renal tissues were vacuolation in the initial stage and upregulation of the kidney injury marker KIM-1. Renal injury is associated with increased production of reactive oxygen species in mitochondria. Conclusion: This study showed changes in the kidney of rats exposed to a balanced diet with glyphosate, suggesting a potential risk to human kidney. Presumably, ultra-processed food that contain glyphosate can potentiate this risk. The relevance of these results lies in drawing attention to the need to regulate glyphosate concentration in ultra-processed foods in the future.


RESUMO Introdução: O glifosato é o herbicida mais utilizado no mundo e no Brasil. Atualmente, há uma preocupação crescente com os efeitos do glifosato na saúde humana. O Instituto Brasileiro de Defesa do Consumidor apresentou dados sobre a presença de glifosato em alguns dos produtos ultraprocessados mais consumidos no Brasil. Atualmente, as regulamentações sobre o limite máximo desses resíduos em alimentos ultraprocessados ainda não foram estabelecidas pela Vigilância Sanitária Nacional, e o consumo de alimentos ultraprocessados está indepen­dentemente associado a um risco maior de doença renal crônica incidente. Métodos: Como uma dieta desbalanceada pode interferir na função renal, este estudo tem como objetivo investigar o efeito da ingestão diária de 5 mg/kg pc de glifosato em conjunto com uma dieta equilibrada e o possível impacto na função renal em ratos. Foram avaliados função renal, peso dos rins, marcadores de lesão renal e estresse oxidativo. Resultados: Houve redução no peso dos rins. As principais alterações histopatológicas nos tecidos renais foram vacuolização no estágio inicial e regulação positiva do marcador de lesão renal KIM-1. A lesão renal está associada à produção aumentada de espécies reativas de oxigênio nas mitocôndrias. Conclusão: Esse estudo mostrou alterações nos rins de ratos expostos a uma dieta balanceada com glifosato, sugerindo um risco potencial ao rim humano. Presumivelmente, alimentos ultraprocessados que contenham glifosato podem potencializar esse risco. A relevância desses resultados está no fato de chamar a atenção para a necessidade de regulamentar a concentração de glifosato em alimentos ultraprocessados no futuro.

4.
Semina cienc. biol. saude ; 45(1): 3-12, jan./jun. 2024. tab
Article in Portuguese | LILACS | ID: biblio-1554865

ABSTRACT

Objetivo: analisar o nível de estresse percebido e sofrimento psíquico em gestores de saúde na pandemia da Covid-19. Método: estudo descritivo, transversal com abordagem quantitativa. A coleta ocorreu de abril a setembro de 2021, com 40 gestores de serviço de saúde. Utilizou-se para a coleta de dados um instrumento para caracterização sociodemográfica e ocupacional e as escalas "Perceived Stress Scale-14" e "Self Reporting Questionnaire" para avaliação do estresse percebido e sofrimento psíquico. Os dados coletados foram analisados no Statistical Package for the Social Sciences versão 22.0. O presente estudo faz parte de um projeto intitulado "Trabalhadores dos Serviços de Saúde Frente à Pandemia de Covid-19", aprovado pelo Comitê de Ética em Pesquisa sob CAAE número 35260620.9.0000.5231. Resultados: a maioria dos profissionais eram do sexo feminino (90%, N=36), casados (70%, N=28), com filhos (80%, N=32), com média de idade de 45 anos e com pós--graduação (47,5%, N=19). A média dos escores relacionados ao estresse percebido foi 31,13 pontos (DP=3,77) sendo o mínimo 24 e máximo de 42 pontos. Com relação ao sofrimento psíquico, (40%, N=16) os gestores apresentaram prováveis casos de transtornos. A prática de atividades físicas e de lazer (p<0,05) tem papel importante na diminuição do estresse percebido e do sofrimento psíquico. Conclusão: os gestores em saúde apresentaram, durante a pandemia, estresse e sofrimento psíquico, resultados esses que devem ser considerados para promoção de autocuidado aos gestores de saúde, enfatizando a necessidade da realização de atividades físicas e de lazer.


Objective: to analyze the level of perceived stress and psychological suffering in health managers during the Covid-19 pandemic. Method: descriptive, cross-sectional study with a quantitative approach. The collection took place from April to September 2021, with 40 health service managers. An instrument for socio-demographic and occupational characterization and the "Perceived Stress Scale-14" and "Self Reporting Questionnaire" scales were used for the assessment of perceived stress and psychic suffering. The collected data were analyzed using the Statistical Package for the Social Sciences version 22.0. The present study is part of a project entitled "Health Service Workers in the Face of the Covid-19 Pandemic", approved by the Research Ethics Committee under CAAE number 35260620.9.0000.5231. Results: most professionals were female (90%, N=36), married (70%, N=28), with children (80%, N=32), with a mean age of 45 years and with a postgraduate degree. -graduation (47.5%, N=19). The average score related to perceived stress was 31.13 points (SD=3.77), with a minimum of 24 and a maximum of 42 points. With regard to psychic suffering, (40%, N=16) the managers presented probable cases of disorders. The practice of physical and leisure activities (p<0.05) plays an important role in reducing perceived stress and psychological distress. Conclusion: health managers presented, during the pandemic, stress and psychic suffering, results that should be considered for promoting self-care to health managers, emphasizing the need to carry out physical and leisure activities.Keywords: Health manager; Occupational stress; Covid-19; Coronavirus infections.


Subject(s)
Humans , Female , Middle Aged
5.
ABCS health sci ; 49: [1-8], 11 jun. 2024.
Article in English | LILACS-Express | LILACS | ID: biblio-1555523

ABSTRACT

Introduction: The increase in the workload of health professionals and the degree of complexity of patients, attribute greater risk to psychosocial stress. Objective: To evaluate the associations between occupational stress, quality of life at work, and coping strategies by the hospital nursing team during the COVID-19 pandemic. Methods: Cross sectional, quantitative study with convenience sampling, data collection from August to December 2020; in two units of the private hospital network, with sociodemographic, occupational and health questionnaires; visual analogue scale for assessing quality of life at work; Demand-Control-Support (DCS); Occupational Coping Scale. Results: The total sample consisted of 196 nursing professionals. There was significant certainty (negative, however, the dimension "Demand" of the DCS and QWL (<0.001, r=-0.367). Control over work-related work has a significant quality (but the "Control" dimension of the DCS and QWL (=0.025, r=0.160); and significantly negative, however, between the "Social Support" dimension of DCS and "Negative Equivalence" of Coping (p=0.003, r=-0.2013). Conclusion: The findings of this study allowed the correlation between occupational stress, coping and quality of life at work, showing that the lower the social support, the greater the use of avoidance strategies and consequently decline in quality of life at work. They also allowed us to identify the coping strategies used by the nursing staff and quality of life at work in the face of occupational stress during the COVID-19 pandemic.

6.
Enferm. foco (Brasília) ; 15: 1-4, maio. 2024. tab
Article in Portuguese | LILACS, BDENF | ID: biblio-1554058

ABSTRACT

Objetivo: Relatar a atuação do enfermeiro estomaterapeuta no manejo da incontinência urinária de esforço. Métodos: Estudo observacional, do tipo relato de caso, seguindo duas fases, onde a primeira foi a coleta de dados e levantamento do histórico clínico do paciente, e segunda fase foi descrever a atuação do enfermeiro estomaterapeuta no manejo da incontinência urinária de esforço. Resultados: Na primeira etapa revelou-se o diagnóstico de incontinência urinária por esforço. Foram aplicados o diário miccional, a terapia comportamental, a cinesioterapia e a eletroestimulação. Conclusão: A atuação do enfermeiro estomaterapeuta no manejo da incontinência urinária de esforço compreende a implementação do tratamento conservador, perpassando pela prevenção, estimulação da mudança comportamental e manejo de tecnologias para fortalecimento da musculatura do assoalho pélvico. (AU)


Objective: To report the role of the nurse stomatherapist in the management of stress urinary incontinence. Methods: Observational study, of the case report type, following two phases, where the first was the collection of data and survey of the patients clinical history, and the second phase was to describe the role of the nurse stomatherapist in the management of stress urinary incontinence. Results: In the first stage the diagnosis of stress urinary incontinence was revealed. Were applied the mictional diary, behavioral therapy, kinesiotherapy and electrostimulation. Conclusion: The role of the nurse stomatherapist in the management of stress urinary incontinence includes the implementation of conservative treatment, through prevention, stimulation of behavioral change and management of technologies for strengthening the pelvic floor muscles. (AU)


Objetivo: Informar sobre el papel de la enfermera estomaterapeuta en el tratamiento de la incontinencia urinaria de esfuerzo. Métodos: Estudio observacional, del tipo case report, siguiendo dos fases, donde la primera fue la recolección de datos y relevamiento de la historia clínica de la paciente, y la segunda fase fue describir la actuación de la enfermera estomaterapeuta en el manejo de la incontinencia urinaria de esfuerzo. Resultados: En la primera etapa se reveló el diagnóstico de incontinencia urinaria de esfuerzo. Se aplicaron el diario miccional, la terapia comportamental, la cinesiterapia y la electroestimulación. Conclusión: La actuación del enfermero estomaterapeuta en el manejo de la incontinência urinaria de esfuerzo comprende la aplicación del tratamiento conservador, pasando por la prevención, la estimación del cambio de comportamiento y el manejo de tecnologías para el fortalecimiento de la musculatura del assoalado pelviano. (AU)


Subject(s)
Urinary Incontinence, Stress , Nursing , Enterostomal Therapy
7.
Podium (Pinar Río) ; 19(1)abr. 2024.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1550627

ABSTRACT

Los emprendimientos en proyectos de la actividad física y el deporte, ante todo, han demostrado ser atractivos y curativos, por excelencia. Es muy notable esta situación en individuos que invierten gran parte de su tiempo sentados frente a un computador, como es el caso de los estudiantes en formación que desarrollan competencias digitales. En este trabajo, se consideró la necesidad de investigar la relación existente entre la labor que realizan estos estudiantes y los inconvenientes para la salud que generan las prolongadas horas que ellos invierten en su trabajo de vinculación con las competencias digitales; por lo que el objetivo consistió en determinar cuáles son las causas fundamentales que provocan el estrés en estudiantes de informática y en qué medida la actividad física que realizan les ayuda reducir estos impactos de la actividad profesional. Para lograrlo, se aplicaron métodos del nivel empírico como la observación científica, la entrevista y la encuesta. Como resultados preliminares, a partir de un prexperimento, se pudo constatar que los estudiantes percibieron un cambio satisfactorio, con niveles inferiores de estrés y mejoras de los comportamientos posturales.


Entrepreneurship in physical activity and sports projects, above all, has proven to be attractive and healing, par excellence. This situation is very notable in individuals who spend a large part of their time sitting in front of a computer, as is the case of students in training who develop digital skills. In this work, the need to investigate the relationship between the work carried out by these students and the health problems generated by the long hours they invest in their work linking with digital skills was considered; therefore, the objective was to determine what are the fundamental causes that cause stress in computer science students and to what extent the physical activity they perform helps them reduce these impacts of professional activity. To achieve this, empirical level methods such as scientific observation, interviews and surveys were applied. As preliminary results, from a pre-experiment, it was confirmed that the students perceived a satisfactory change, with lower levels of stress and improvements in postural behaviors.


O empreendedorismo em projetos de atividade física e esportivos, sobretudo, tem se mostrado atrativo e curativo, por excelência. Esta situação é muito notória nos indivíduos que passam grande parte do seu tempo sentados em frente ao computador, como é o caso dos alunos em formação que desenvolvem competências digitais. Neste trabalho foi considerada a necessidade de investigar a relação entre o trabalho realizado por esses alunos e os problemas de saúde gerados pelas longas horas que investem no seu trabalho vinculando-se às competências digitais; Portanto, objetivou-se determinar quais são as causas fundamentais que causam estresse em estudantes de informática e em que medida a atividade física que realizam os ajuda a reduzir esses impactos da atividade profissional. Para conseguir isso, foram aplicados métodos de nível empírico, como observação científica, entrevistas e pesquisas. Como resultados preliminares, de um pré-experimento, confirmou-se que os alunos perceberam uma mudança satisfatória, com menores níveis de estresse e melhorias nos comportamentos posturais.

8.
Invest. educ. enferm ; 42(1): 23-38, 20240408. ilus, tab
Article in English | LILACS, BDENF, COLNAL | ID: biblio-1554184

ABSTRACT

Objective.To assess the effectiveness of an educational intervention on perceived stress and metabolic syndrome parameters among adults with type 2 diabetes mellitus. Method. Fifty-one adults (aged 48.73±7.84; 86.3% of women) were included in a non-randomized clinical trial performed in a healthcare unit for six months (Brazilian Clinical Trial Registry: RBR-43K52N). All participants were diagnosed with type 2 diabetes mellitus and metabolic syndrome (intervention group, n=26; control group, n=25). The intervention consisted of a nurse-led educational health-promoting program with a multidisciplinary approach organized in seven workshops. The primary outcome was decreased perceived stress, and the secondary outcome was improvement in metabolic syndrome parameters according to perceived stress levels. These outcomes were assessed at two points in time, at the baseline and follow-up. Results. Participation in the intervention program resulted in a significant decrease in perceived stress (p=0.028). The stressed participants in the intervention group experienced a significant decrease in blood glucose levels (p=0.001) and a significant increase in high-density lipoprotein-cholesterol (p=0.003) concentrations after the six-month intervention. Conclusion.The nurse-led educational health-promoting program decreased perceived stress among adults with type 2 diabetes mellitus and metabolic syndrome, improving fasting blood glucose and high-density lipoprotein cholesterol among the stressed participants in the intervention group.


Objetivo. Evaluar la efectividad de una intervención educativa sobre el estrés percibido y los componentes del síndrome metabólico en adultos con diabetes mellitus tipo 2. Métodos. Se incluyeron 51 adultos (48.73±7.84 años; 86.3% mujeres) de un estudio no-ensayo aleatorizado realizado en una unidad de salud durante seis meses, con Registro Brasileño de Ensayos Clínicos: RBR-43K52N, todos los participantes fueron diagnosticados con diabetes mellitus tipo 2 y síndrome metabólico (grupo intervención, n=26; grupo control, n=25). La intervención consistió en un programa educativo de promoción de la salud con enfoque multidisciplinario, liderado por una enfermera, estructurado en siete talleres grupales. El resultado primario fue la reducción del estrés percibido y el secundario, la mejora de los componentes del síndrome metabólico influenciados por el nivel de estrés percibido, evaluado en dos momentos, al inicio y después del seguimiento. Resultados. La participación en el programa de intervención resultó en una reducción significativa del estrés percibido en comparación con el grupo control (p=0.028). Los participantes estresados en el grupo de intervención tuvieron, respectivamente, una disminución y un aumento significativos en las concentraciones séricas de glucosa (p=0.001) y lipoproteínas de alta densidad-colesterol (p=0.003) después de seis meses de intervención. Conclusión. Un programa educativo de promoción de la salud liderado por enfermeras fue eficiente para reducir el estrés percibido entre adultos con diabetes mellitus tipo 2 y síndrome metabólico, además de mejorar la glucemia en ayunas y el colesterol unido a lipoproteínas de alta densidad en los participantes del grupo estresado de intervención.


Objetivo. Avaliar a efetividade de uma intervenção educativa sobre o estresse percebido e os componentes da síndrome metabólica em adultos com diabetes mellitus tipo 2. Métodos. Foram incluídos 51 adultos (48.73±7.84 anos de idade; 86.3% mulheres) em um ensaio clínico não-randomizado realizado em uma unidade de saúde durante seis meses, com Registro de Ensaio Clínico Brasileiro: RBR-43K52N.Todos os participantes apresentavam diagnóstico de diabetes mellitus tipo 2 e síndrome metabólica (grupo intervenção, n=26; grupo controle, n=25). A intervenção consistiu em um programa educativo de promoção da saúde com abordagem multidisciplinar, liderado por enfermeiro, estruturado em sete oficinas em grupo. O desfecho primário foi a redução do estresse percebido, e o secundário, a melhora dos componentes da síndrome metabólica conforme influência do nível de estresse percebido, avaliados em dois momentos, na condição basal e após o acompanhamento. Resultados. A participação no programa de intervenção resultou na redução significativa do estresse percebido em comparação com o grupo controle (p=0.028). Os participantes estressados do grupo intervenção tiveram, respectivamente, diminuição e aumento significativos das concentrações séricas de glicose (p=0.001) e da lipoproteína-colesterol de alta densidade (p=0.003) após seis meses de intervenção. Conclusão. Um programa educativo de promoção da saúde liderado por enfermeiros foi eficiente para reduzir estresse percebido entre adultos com diabetes mellitus tipo 2 e síndrome metabólica, além de causar melhora da glicemia de jejum e e da lipoproteína-colesterol de alta densidade dos participantes estressados do grupo intervenção.


Subject(s)
Humans , Male , Female , Stress, Psychological , Community Health Nursing , Metabolic Syndrome , Diabetes Mellitus, Type 2
9.
J. bras. nefrol ; 46(1): 18-28, Mar. 2024. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1534764

ABSTRACT

Abstract Introduction: Nephrotic syndrome (NS) is one of the reasons of end-stage kidney disease, and elucidating the pathogenesis and offer new treatment options is important. Oxidative stress might trigger pathogenesis systemically or isolated in the kidneys. Octreotide (OCT) has beneficial antioxidant effects. We aimed to investigate the source of oxidative stress and the effect of OCT on experimental NS model. Methods: Twenty-four non-uremic Wistar albino rats were divided into 3 groups. Control group, 2 mL saline intramuscular (im); NS group, adriamycin 5 mg/kg intravenous (iv); NS treatment group, adriamycin 5 mg/kg (iv) and OCT 200 mcg/kg (im) were administered at baseline (Day 0). At the end of 21 days, creatinine and protein levels were measured in 24-hour urine samples. Erythrocyte and renal catalase (CAT) and thiobarbituric acid reactive substance (TBARS) were measured. Renal histology was also evaluated. Results: There was no significant difference among the 3 groups in terms of CAT and TBARS in erythrocytes. Renal CAT level was lowest in NS group, and significantly lower than the control group. In treatment group, CAT level significantly increased compared with NS group. In terms of renal histology, tubular and interstitial evaluations were similar in all groups. Glomerular score was significantly higher in NS group compared with control group and it was significantly decreased in treatment group compared to NS group. Conclusions: Oxidative stress in NS might be due to the decrease in antioxidant protection mechanism in kidney. Octreotide improves antioxidant levels and histology in renal tissue and might be a treatment option.


Resumo Introdução: Síndrome nefrótica (SN) é uma das causas de doença renal em estágio terminal. É importante elucidar a patogênese e oferecer novas opções de tratamento. Estresse oxidativo pode desencadear a patogênese sistemicamente ou isoladamente nos rins. O octreotide (OCT) tem efeitos antioxidantes benéficos. Nosso objetivo foi investigar a fonte de estresse oxidativo e efeito do OCT no modelo experimental de SN. Métodos: Dividimos 24 ratos albinos Wistar não urêmicos em 3 grupos. Grupo controle, 2 mL de solução salina intramuscular (im); grupo SN, adriamicina 5 mg/kg intravenosa (iv); grupo tratamento SN, adriamicina 5 mg/kg (iv) e OCT 200 mcg/kg (im) foram administrados no início do estudo (Dia 0). Aos 21 dias, mediram-se os níveis de creatinina e proteína em amostras de urina de 24 horas. Mediu-se a catalase (CAT) eritrocitária e renal e a substância reativa ao ácido tiobarbitúrico (TBARS). Avaliou-se também histologia renal. Resultados: Não houve diferença significativa entre os três grupos em termos de CAT e TBARS em eritrócitos. O nível de CAT renal foi menor no grupo SN e significativamente menor que no grupo controle. No grupo tratamento, o nível de CAT aumentou significativamente em comparação com o grupo SN. Quanto à histologia renal, as avaliações tubular e intersticial foram semelhantes em todos os grupos. O escore glomerular foi significativamente maior no grupo SN em comparação com o grupo controle e diminuiu significativamente no grupo de tratamento em comparação com o grupo SN. Conclusões: Estresse oxidativo na SN pode ser devido à diminuição do mecanismo de proteção antioxidante nos rins. O octreotide melhora níveis de antioxidantes e histologia do tecido renal e pode ser uma opção de tratamento.

10.
Arch. argent. pediatr ; 122(1): e202202975, feb. 2024. tab
Article in English, Spanish | LILACS, BINACIS | ID: biblio-1524319

ABSTRACT

Introducción. La evaluación de la condición física (CF), junto con otros indicadores de salud, es una estrategia utilizada para conocer el estado actual de los escolares. El principal objetivo fue medir en escolares sanluiseños el estado de salud actual, los niveles de CF y construir tablas de referencias de CF. Población y métodos. Escolares entre 9 y 12 años de edad (ambos sexos) fueron evaluados con dos indicadores de salud: índice de masa corporal y presión arterial. La CF fue medida con la batería ALPHA-Fitness. El orden de las pruebas fue el siguiente: tensión arterial, masa corporal, estatura, longitud de pie y mano, salto en longitud, velocidad en 30 metros, agilidad 4 × 10 m y la prueba de ida y vuelta en 20 metros. Se calculó el índice de masa corporal (IMC) y la maduración biológica. Resultados. Fueron evaluados 15548 escolares. Los valores promedios fueron presión arterial sistólica 101 ± 10 mmHg y diastólica 66 ± 7 mmHg; IMC 20,2 ± 4,3 kg/m2. Para la CF fueron las siguientes: componente cardiorrespiratorio VO2 máx. 39,87 ± 3,2 ml/kg/min y velocidad alcanzada en la prueba de ida y vuelta en 20 m 8,9 ± 0,6 km/h; componente neuromuscular; salto en longitud: 120,6 ± 23,9 cm, velocidad 30 m: 6,56 ± 0,85 s, agilidad 4 × 10 m: 15,17 ± 1,82 s. El rendimiento siempre fue superior en el grupo masculino (p <0,001). Conclusión. Los escolares mostraron niveles saludables de presión arterial. El 50 % de la muestra fue clasificada con sobrepeso u obesidad según el IMC. En ambos sexos, se observaron bajos niveles de CF. Por primera vez, se elaboraron tablas de referencia de CF en escolares sanluiseños


Introduction. The assessment of physical fitness (PF), is useful strategy to know the current status of schoolchildren. Our primary objective was to measure the current health status and PF levels of schoolchildren in San Luis and to develop PF reference tables. Population and methods. Schoolchildren aged 9 to 12 years (boys and girls) were assessed based on 2 health indicators: body mass index and blood pressure. PF was measured using the ALPHA-Fitness test battery. Blood pressure, body mass, height, foot and hand length, standing long jump, 30 m sprint, 4 × 10 m agility test, and 20 m shuttle run test were assessed. The body mass index (BMI) and biological maturation were estimated. Results. A total of 15 548 schoolchildren were assessed. Average systolic blood pressure was 101 ± 10 mmHg and diastolic blood pressure, 66 ± 7 mmHg; BMI: 20.2 ± 4.3 kg/m2. Average PF was, in the cardiorespiratory component, VO2 max.: 39.87 ± 3.2 mL/kg/min and speed reached during the 20 m shuttle run test: 8.9 ± 0.6 km/h; in the musculoskeletal component, standing long jump: 120.6 ± 23.9 cm, 30 m sprint: 6.56 ± 0.85 s, 4 × 10 m agility test: 15.17 ± 1.82 s. The performance was better in the boys group (p < 0.001). Conclusion. Blood pressure was normal. Fifty percent of the sample was overweight or obese as per their BMI. Both boys and girls showed low PF levels. PF reference tables for schoolchildren from San Luis were developed for the first time.


Subject(s)
Humans , Male , Female , Child , Physical Fitness/psychology , Exercise Test , Argentina , Exercise/psychology , Body Mass Index , Cross-Sectional Studies
11.
Braz. j. med. biol. res ; 57: e13229, fev.2024. graf
Article in English | LILACS-Express | LILACS | ID: biblio-1534065

ABSTRACT

Abstract The incidence of non-alcoholic fatty liver (NAFLD) remains high, and many NAFLD patients suffer from severe ischemia-reperfusion injury (IRI). Currently, no practical approach can be used to treat IRI. Puerarin plays a vital role in treating multiple diseases, such as NAFLD, stroke, diabetes, and high blood pressure. However, its role in the IRI of the fatty liver is still unclear. We aimed to explore whether puerarin could protect the fatty liver from IRI. C57BL/6J mice were fed with a high‐fat diet (HFD) followed by ischemia reperfusion injury. We showed that hepatic IRI was more severe in the fatty liver compared with the normal liver, and puerarin could significantly protect the fatty liver against IRI and alleviate oxidative stress. The PI3K-AKT signaling pathway was activated during IRI, while liver steatosis decreased the level of activation. Puerarin significantly protected the fatty liver from IRI by reactivating the PI3K-AKT signaling pathway. However, LY294002, a PI3K-AKT inhibitor, attenuated the protective effect of puerarin. In conclusion, puerarin could significantly protect the fatty liver against IRI by activating the PI3K-AKT signaling pathway.

12.
Int. j. morphol ; 42(1): 1-8, feb. 2024. tab, graf
Article in English | LILACS | ID: biblio-1528813

ABSTRACT

SUMMARY: Temporomandibular joint dysfunction interferes with the quality of life and activities of daily living among patients. The symptoms of temporomandibular dysfunction, including pain and clicking and popping sounds, are worsened during stressful events, and patients report increased pain around the temporomandibular joint. Stress-related behaviors, such as teeth clenching and teeth grinding, are commonly reported as increasing during stress. The prevalence of temporomandibular dysfunction and stress-related behaviors is reported differently in the literature. Stress in higher education is common. The purpose of this pilot study was to investigate the prevalence of temporomandibular joint dysfunction and stress-related behaviors among staff members at a local University. The study also sought to explore pain patterns described by people experiencing temporomandibular joint dysfunction and the relationship between stress-related behaviors and pain symptoms experienced. Further, the impact of stress on symptoms experienced by people with temporomandibular dysfunction was investigated in this pilot study.


La disfunción de la articulación temporomandibular interfiere con la calidad de vida y las actividades de la vida diaria entre los pacientes. Los síntomas de la disfunción temporomandibular, incluidos el dolor y los chasquidos, empeoran durante los eventos estresantes, y los pacientes informan un aumento del dolor alrededor de la articulación temporomandibular. Los comportamientos relacionados con el estrés, como apretar y rechinar los dientes, suelen aumentar durante el estrés. La prevalencia de la disfunción temporomandibular y los comportamientos relacionados con el estrés se informa de manera diferente en la literatura. El estrés en la educación superior es común. El propósito de este estudio piloto fue investigar la prevalencia de la disfunción de la articulación temporomandibular y los comportamientos relacionados con el estrés entre los miembros del personal de una universidad local. El objetivo del estudio además fue explorar los patrones de dolor descritos por personas que experimentan disfunción de la articulación temporomandibular y la relación entre los comportamientos relacionados con el estrés y los síntomas de dolor experimentados. Además, en este estudio piloto se investigó el impacto del estrés en los síntomas que experimentan las personas con disfunción temporomandibular.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Young Adult , Stress, Psychological/epidemiology , Temporomandibular Joint Disorders/psychology , Temporomandibular Joint Disorders/epidemiology , Pain/psychology , Pain/epidemiology , Universities , Pilot Projects , Prevalence , Surveys and Questionnaires
13.
Int. j. morphol ; 42(1): 205-215, feb. 2024. ilus, tab
Article in English | LILACS | ID: biblio-1528814

ABSTRACT

SUMMARY: This study assessed the effects of Acacia Senegal (AS) combined with insulin on Na+/K+-ATPase (NKA) activity and mRNA expression, serum glucose, renal function, and oxidative stress in a rat model of diabetic nephropathy (DN). Sixty rats were equally divided into six groups: normal control, normal+AS, diabetic (DM), DM+insulin, DM+AS, and DM+insulin+AS groups. Diabetes mellitus (type 1) was induced by a single injection of streptozotocin (65 mg/kg), and insulin and AS treatments were carried until rats were culled at the end of week 12. Serum glucose and creatinine levels, hemoglobin A1c (HbA1c) were measured. Renal homogenate levels of NKA activity and gene expression, malondialdehyde, superoxide dismutase (SOD), catalase and reduced glutathione (GSH) were evaluated as well as kidney tissue histology and ultrastructure. Diabetes caused glomerular damage and modulation of blood and tissue levels of creatinine, glucose, HbA1c, malondialdehyde, NKA activity and gene expression, SOD, catalase and GSH, which were significantly (p<0.05) treated with AS, insulin, and insulin plus AS. However, AS+insulin treatments were more effective. In conclusion, combined administration of AS with insulin to rats with DN decreased NKA activity and gene expression as well as oxidative stress, and improved glycemic state and renal structure and function.


Este estudio evaluó los efectos de Acacia senegal (AS) combinada con insulina sobre la actividad Na+/K+- ATPasa (NKA) y la expresión de ARNm, la glucosa sérica, la función renal y el estrés oxidativo en un modelo de nefropatía diabética (ND) en ratas. Sesenta ratas se dividieron equitativamente en seis grupos: control normal, normal+AS, diabética (DM), DM+insulina, DM+AS y DM+insulina+AS. La diabetes mellitus (tipo 1) se indujo mediante una única inyección de estreptozotocina (65 mg/kg), y los tratamientos con insulina y AS se llevaron a cabo hasta que las ratas fueron sacrificadas al final de la semana 12. Se midieron niveles séricos de glucosa y creatinina, hemoglobina A1c (HbA1c). Se evaluaron los niveles de homogeneizado renal de actividad NKA y expresión génica, malondialdehído, superóxido dismutasa (SOD), catalasa y glutatión reducido (GSH), así como la histología y ultraestructura del tejido renal. La diabetes causó daño glomerular y modulación de los niveles sanguíneos y tisulares de creatinina, glucosa, HbA1c, malondialdehído, actividad y expresión génica de NKA, SOD, catalasa y GSH, los cuales fueron tratados significativamente (p<0,05) con AS, insulina e insulina más AS. Sin embargo, los tratamientos con AS+insulina fueron más efectivos. En conclusión, la administración combinada de AS con insulina a ratas con DN disminuyó la actividad de NKA y la expresión genética, así como el estrés oxidativo, y mejoró el estado glucémico y la estructura y función renal.


Subject(s)
Animals , Male , Rats , Plant Extracts/administration & dosage , Sodium-Potassium-Exchanging ATPase/drug effects , Diabetic Nephropathies/drug therapy , Acacia/chemistry , Superoxide Dismutase , Glycated Hemoglobin/analysis , Plant Extracts/pharmacology , Gene Expression , Rats, Sprague-Dawley , Sodium-Potassium-Exchanging ATPase/genetics , Oxidative Stress , Microscopy, Electron, Transmission , Disease Models, Animal , Drug Therapy, Combination , Glycemic Control , Insulin/administration & dosage , Kidney/drug effects , Malondialdehyde
14.
Article in English | LILACS, BDENF, COLNAL | ID: biblio-1553384

ABSTRACT

Introduction: Work-related stress is the physical and emotional manifestation triggered by an imbalance in coping with perceived demands. One of the workers most affected by work-related stress is the nursing staff, a situation that was exacerbated during the COVID-19 pandemic and could affect their quality of life. Objective: To evaluate the connection between quality of life and work-related stress in nurses during the COVID-19 pandemic. Materials and Methods: Analytical, cross-sectional study, with a quantitative approach. Descriptive statistics and multiple linear regression analysis were used for the present study. Results: A negative correlation was obtained between quality of life and stress level (r = -0,438, p < 0,01), and being a professional nurse was related to higher stress levels. On the other hand, being 31 years or older and having more than 12 months of work experience were associated with a higher quality of life score, while being female, single, divorced, or widowed and having higher acute stress scores indicated a significantly worse quality of life. Discussion: Acute stress negatively affects the quality of life of nurses during the COVID-19 pandemic and this differs significantly according to age, sex, marital status, and work experience. Conclusion: It is recommended that the health sector authorities design policies that guarantee strategies to improve the mental health of nursing personnel, as well as to guarantee fair and dignified treatment.


Subject(s)
Quality of Life , Nursing , Pandemics , Occupational Stress , COVID-19
15.
J. appl. oral sci ; 32: e20230344, 2024. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1534759

ABSTRACT

Abstract Objective: This study aimed to investigate the effects of systemic administration of P. eurycarpa Yalt. plant extract on alveolar bone loss and oxidative stress biomarkers in gingival tissue in a rat model of experimental periodontitis. Methodology: 32 male Wistar albino rats, weighing 200-250 g, were divided into four groups (n=8): Healthy control (HC), Experimental periodontitis control (EPC), Experimental periodontitis 400 mg/kg (EP400), Experimental periodontitis 800 mg/kg (EP800). Experimental periodontitis was induced using the ligating method. Distilled water was administered to the HC and EPC groups and the plant extract was administered to the EP400 and EP800 groups by oral gavage at doses of 400 mg/kg and 800 mg/kg, respectively. The rats were sacrificed on the 15th day. The values of glutathione peroxidase GSH-Px, malondialdehyde (MDA), superoxide dismustase (SOD), interleukin-1β (IL-1β), interleukin-10 (IL-10), total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI) in the gingival tissues were analyzed by ELISA tests. Alveolar bone loss was assessed using micro-CT images of the maxilla. Results: Although the IL-1β, TOS, OSI results of the healthy control group were lower than those of the other groups, the TAS values were higher (p<0.05). No significant difference was found in the biochemical parameters among the EPC, EP400, and EP800 groups (p>0.05). Alveolar bone loss was significantly reduced in the extract groups compared to the EPC group (p<0.001). Conclusion: Within the limitations of this study, it was observed that the systemic P. eurycarpa extract application reduced alveolar bone loss in a rat model of experimental periodontitis. Further studies are needed to elucidate the beneficial effects of P. eurycarpa.

16.
Rev. bras. enferm ; 77(supl.3): e20230290, 2024. graf
Article in English | LILACS-Express | LILACS, BDENF | ID: biblio-1535577

ABSTRACT

ABSTRACT Objective: To understand the meaning attributed by women with physical disabilities to the health care received and expected during labor and delivery. Methods: Qualitative study, based on Social Network Theory, conducted through an online workshop in April 2022, with the participation of six women with physical disabilities. Data, collected through the focus group technique, underwent thematic content analysis with the assistance of the IRaMuTeQ tool. Results: Three thematic categories emerged: Challenges experienced during pregnancy; The experience within the maternity ward; and, The importance of social networks. The assistance provided by healthcare professionals sometimes differed between what was expected and what was received by women with physical disabilities during labor and delivery. Final Considerations: Experiences were predominantly negative, resulting from inappropriate professional conduct due to ableist attitudes. Support from members of social networks is crucial for preventing stressors.


RESUMEN Objetivo: Comprender el significado atribuido por mujeres con discapacidad física a la asistencia de salud recibida y esperada durante el trabajo de parto y parto. Métodos: Estudio cualitativo, fundamentado en la Teoría de Redes Sociales, llevado a cabo mediante un taller en línea en abril de 2022, con la participación de seis mujeres con discapacidad física. Los datos, recopilados mediante la técnica de grupo focal, fueron sometidos a análisis de contenido temático con la ayuda de la herramienta IRaMuTeQ. Resultados: Emergieron tres categorías temáticas: Problemas experimentados durante el embarazo; La experiencia dentro de la maternidad; y La importancia de las redes sociales. La asistencia proporcionada por los profesionales de la salud, en ocasiones, difirió entre lo esperado y lo recibido por las mujeres con discapacidad física durante el trabajo de parto y parto. Consideraciones finales: Las experiencias fueron predominantemente negativas, resultado de conductas profesionales inadecuadas debido a actitudes capacitistas. El apoyo de los miembros de las redes sociales es fundamental para la prevención de factores estresores.


RESUMO Objetivo: Compreender o significado atribuído por mulheres com deficiência física à assistência de saúde recebida e esperada durante o trabalho de parto e parto. Métodos: Estudo qualitativo, fundamentado na Teoria de Rede Social, realizado por meio de uma oficina online em abril de 2022, com a participação de seis mulheres com deficiência física. Os dados, coletados por meio da técnica de grupo focal, foram submetidos à análise de conteúdo temático com o auxílio da ferramenta IRaMuTeQ. Resultados: Três categorias temáticas emergiram: Problemas vivenciados na gravidez; A experiência dentro da maternidade; e A importância das redes sociais. A assistência prestada pelos profissionais de saúde, por vezes, diferiu entre o esperado e o recebido pelas mulheres com deficiência física durante o trabalho de parto e parto. Considerações Finais: As vivências foram predominantemente negativas, resultantes de condutas profissionais inadequadas devido a atitudes capacitistas. O apoio dos membros das redes sociais é fundamental para a prevenção de fatores estressores.

17.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 255-263, 2024.
Article in Chinese | WPRIM | ID: wpr-999183

ABSTRACT

Diabetic peripheral neuropathy(DPN) is a neurodegenerative disease of diabetes mellitus involving peripheral nervous system damage, which is characterized by axonal degenerative necrosis, Schwann cell apoptosis and demyelination of nerve myelin sheath as the main pathological features, this disease is highly prevalent and is a major cause of disability in diabetic patients. Currently, the pathogenesis of DPN may be related to oxidative stress, inflammatory response, metabolic abnormality, and microcirculation disorder. The treatment of DPN in modern medicine mainly starts from controlling blood glucose, nourishing nerves and improving microcirculation, which can only alleviate the clinical symptoms of patients, and it is difficult to fundamentally improve the pathological damage of peripheral nerves. Mitochondrial quality control refers to the physiological mechanisms that can maintain the morphology and functional homeostasis of mitochondria, including mitochondrial biogenesis, mitochondrial dynamics, mitochondrial oxidative stress and mitochondrial autophagy, and abnormal changes of which may cause damage to peripheral nerves. After reviewing the literature, it was found that traditional Chinese medicine(TCM) can improve the low level of mitochondrial biogenesis in DPN, maintain the balance of mitochondrial dynamics, inhibit mitochondrial oxidative stress and mitochondrial autophagy, and delay apoptosis of Schwann cells and neural axon damage, which has obvious effects on the treatment of DPN. With the deepening of research, mitochondrial quality control may become one of the potential targets for the research of new anti-DPN drugs, therefore, this paper summarized the research progress of TCM in treating DPN based on four aspects of mitochondrial quality control, with the aim of providing a theoretical research basis for the discovery of new drugs.

18.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 103-111, 2024.
Article in Chinese | WPRIM | ID: wpr-999166

ABSTRACT

ObjectiveTo observe the effect of Tongxie Yaofang on the function of tumor-related natural killer (NK) cells under chronic stress and explore the possible molecular mechanism. MethodFifty SPF-grade BABL/C male mice were randomized into normal, model, and low-, medium-, and high-dose (6.825, 13.65, and 27.3 g·kg-1, respectively) Tongxie Yaofang groups, with 10 mice in each group. Other groups except the blank group were subjected to 7 days of chronic restraint stress, and then forced swimming and tail suspension tests were carried out to evaluate the modeling performance. After the successful modeling, rats in Tongxie Yaofang groups were administrated with low-, medium-, and high-doses of Tongxie Yaofang by gavage, while those in the other groups were administrated with normal saline by gavage. After 14 days, each group of mice was inoculated with subcutaneous colon cancer to establish the model of colon cancer under chronic stress. The pathological changes of the tumor tissue in each group of mice were observed using hematoxylin-eosin (HE) staining. The content of CD49b-positive cells in the peripheral blood and tumor tissue of mice was measured by flow cytometry. Enzyme-linked immunosorbent assay (ELISA) was employed to measure the content of molecules associated with NK cell activation in the peripheral blood. Western blot was employed to determine the protein levels of major histocompatibility complex class Ⅰ polypeptide-related sequences A and B (MICA+MICB) and UL-16-binding protein 1 (ULBP1) in the tumor tissue. ResultCompared with the normal group, the model group showed a decrease in 5-hydroxytryptamine (5-HT) content and an increase in corticosterone (CORT) content in the serum (P<0.05). Compared with the model group, Tongxie Yaofang increased the 5-HT content and decreased the CORT content (P<0.05, P<0.01). Compared with the normal group, the modeling increased the tumor volume and weight (P<0.05), while Tongxie Yaofang inhibited such increases with no statistical significance. The tumor cells in the model group presented neat arrangement, irregular shape, uneven size, obvious atypia, common nuclear division, and small necrotic area, and blood vessels were abundant surrounding the tumor cells. Compared with the model group, Tongxie Yaofang groups showed sparse arrangement of tumor cells, different degrees of patchy necrosis areas in the tumor, and karyorrhexis, dissolution, and nuclear debris in the necrotic part. Compared with the normal group, the model group showed reduced CD49b-positive cells in the peripheral blood and tumor tissue (P<0.01). Compared with the model group, Tongxie Yaofang increased CD49b-positive cells (medium dose P<0.01, high dose P<0.05, P<0.01). Compared with the normal group, the modeling lowered the serum levels of granzymes-B (Gzms-B), perforin (PF), interferon (IFN)-γ, and tumor necrosis factor (TNF)-α (P<0.05, P<0.01). Compared with the model group, low-dose Tongxie Yaofang elevated the serum levels of PF, Gzms-B, and TNF-α (P<0.05, P<0.01), and medium-dose Tongxie Yaofang elevated the serum levels of Gzms-B, PF, IFN-γ, and TNF-α (P<0.05, P<0.01). In addition, high-dose Tongxie Yaofang elevated the serum levels of PF, IFN-γ, and TNF-α (P<0.01). Compared with the normal group, the model group presented down-regulated protein level of ULBP1 (P<0.05). Compared with the model group, low-, medium-, and high-dose Tongxie Yaofang up-regulated the protein level of ULBP1 (P<0.05, P<0.01), and medium- and high-dose Tongxie Yaofang up-regulated the protein level of MICA+MICB (P<0.05, P<0.01). ConclusionTongxie Yaofang may promote NK cell activation by up-regulating the expression of MICA+MICB and ULBP1, thereby delaying the progression of colon cancer under chronic stress.

19.
Braz. j. biol ; 84: e253696, 2024. graf
Article in English | LILACS, VETINDEX | ID: biblio-1355862

ABSTRACT

Abstract Transplanting time and genotype contribute to improving crop yield and quality of eggplant (Solanum melongena L.). A field experiment was conducted to investigate the impact of foliar applied of triacontanol (TRIA) and eggplant genotypes 25919, Nirala, 28389 and Pak-10927,transplanted on 1 March,15 March, and 1 April on exposure to high air temperature conditions. The experiment was performed according to Randomized Complete Block Design and the data was analyzed by using Tuckey,s test . The TRIA was applied at 10µM at flowering stage; distilled water was used as the control. Rate of photosynthesis and transpiration, stomatal conductance, water use efficiency, and effects on antioxidative enzymes (superoxide dismutase, catalase and peroxidase) were evaluated. The 10µM TRIA increased photosynthesis rate and water use efficiency and yield was improved in all genotypes transplanted at the different dates. Foliar application of 10µM TRIA increased antioxidative enzyme activities (SOD, POD & CAT) and improved physiological as well as biochemical attributes of eggplant genotypes exposed to high heat conditions. Highest activity of dismutase enzyme 5.41mg/1g FW was recorded in Nirala genotype in second transplantation. Whereas, lowest was noted in PAK-10927 (2.30mg/g FW). Maximum fruit yield was found in accession 25919 (1.725kg per plant) at 1st transplantation with Triacontanol, whereas accession PAK-10927 gave the lowest yield (0.285 kg per plant) at control treatment on 3rd transplantation. Genotype, transplanting date and application of TRIA improved growth, yield and quality attributes under of heat stress in eggplant.


Resumo O tempo de transplante e o genótipo contribuem para melhorar a produtividade e a qualidade da cultura da berinjela (Solanum melongena L.). Um experimento de campo foi conduzido para investigar o impacto da aplicação foliar de triacontanol (TRIA) e genótipos de berinjela 25919, Nirala, 28389 e Pak-10927, transplantados em 1 de março, 15 de março e 1 de abril de exposição a condições de alta temperatura do ar. O experimento foi realizado de acordo com o Randomized Complete Block Design e os dados foram analisados pelo teste de Tuckey. O TRIA foi aplicado a 10 µM na fase de floração; água destilada foi utilizada como controle. Taxa de fotossíntese e transpiração, condutância estomática, eficiência do uso da água e efeitos sobre as enzimas antioxidantes (superóxido dismutase, catalase e peroxidase) foram avaliados. O TRIA 10 µM aumentou a taxa de fotossíntese e a eficiência do uso da água e o rendimento foi melhorado em todos os genótipos transplantados nas diferentes datas. A aplicação foliar de TRIA 10µM aumentou as atividades das enzimas antioxidantes (SOD, POD e CAT) e melhorou os atributos fisiológicos e bioquímicos de genótipos de berinjela expostos a condições de alto calor. A atividade mais elevada da enzima dismutase 5,41mg / 1g FW foi registrada no genótipo Nirala no segundo transplante. Considerando que o mais baixo foi observado em PAK-10927 (2,30 mg / g FW). A produtividade máxima de frutos foi encontrada no acesso 25919 (1,725 ​​kg por planta) no 1º transplante com Triacontanol, enquanto o acesso PAK-10927 deu a menor produção (0,285 kg por planta) no tratamento de controle no 3º transplante. Genótipo, data de transplante e aplicação de TRIA, melhoramento do crescimento, rendimento e atributos de qualidade sob estresse térmico em berinjela.


Subject(s)
Solanum melongena/genetics , Solanum melongena/metabolism , Photosynthesis , Heat-Shock Response , Fatty Alcohols , Antioxidants/metabolism , Antioxidants/pharmacology
20.
Braz. j. biol ; 84: e257739, 2024. tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1355883

ABSTRACT

Abstract Under salt stress conditions, plant growth is reduced due to osmotic, nutritional and oxidative imbalance. However, salicylic acid acts in the mitigation of this abiotic stress by promoting an increase in growth, photosynthesis, nitrogen metabolism, synthesis of osmoregulators and antioxidant enzymes. In this context, the objective was to evaluate the effect of salicylic acid doses on the growth and physiological changes of eggplant seedlings under salt stress. The experiment was conducted in a greenhouse, where the treatments were distributed in randomized blocks using a central composite matrix Box with five levels of electrical conductivity of irrigation water (CEw) (0.50; 1.08; 2.50; 3.92 and 4.50 dS m-1), associated with five doses of salicylic acid (SA) (0.00; 0.22; 0.75; 1.28 and 1.50 mM), with four repetitions and each plot composed of three plants. At 40 days after sowing, plant height, stem diameter, number of leaves, leaf area, electrolyte leakage, relative water content, and total dry mass were determined. ECw and SA application influenced the growth and physiological changes of eggplant seedlings. Increasing the ECw reduced growth in the absence of SA. Membrane damage with the use of SA remained stable up to 3.9 dS m-1 of ECw. The relative water content independent of the CEw increased with 1.0 mM of SA. The use of SA at the concentration of 1.0 mM mitigated the deleterious effect of salinity on seedling growth up to 2.50 dS m-1 of ECw.


Resumo Em condições de estresse salino, o crescimento das plantas é reduzido, em virtude, do desequilíbrio osmótico, nutricional e oxidativo. Contudo, o ácido salicílico atua na mitigação desse estresse abiótico por promover incremento no crescimento, fotossíntese, metabolismo do nitrogênio, síntese de osmorreguladores e enzimas antioxidantes. Nesse contexto, objetivou-se avaliar o efeito de doses de ácido salicílico sobre o crescimento e alterações fisiológicas de mudas de berinjela sob estresse salino. O experimento foi conduzido em casa de vegetação, onde os tratamentos foram distribuídos em blocos ao acaso utilizando uma matriz composta central Box com cinco níveis de condutividade elétrica da água de irrigação (CEa) (0,50; 1,08; 2,50; 3,92 e 4,50 dS m-1), associada a cinco doses de ácido salicílico (AS) (0,00; 0,22; 0,75; 1,28 e 1,50 mM), com quatro repetições e cada parcela composta por três plantas. Aos 40 dias após a semeadura, foram determinados a altura da planta, diâmetro do caule, número de folhas, área foliar, vazamento de eletrólito, teor relativo de água e massa seca total. A CEa e a aplicação de AS influenciaram no crescimento e nas alterações fisiológicas das mudas de berinjela. O aumento da CEa reduziu o crescimento na ausência de AS. O dano de membrana com o uso de AS manteve-se estável até 3,9 dS m-1 de CEa. O conteúdo relativo de água independentemente da CEa aumentou com 1 mM de SA. O uso de AS na concentração de 1 mM mitigou o efeito deletério da salinidade no crescimento das mudas até 2,50 dS m-1 de CEa.


Subject(s)
Salicylic Acid/pharmacology , Solanum melongena/metabolism , Photosynthesis , Stress, Physiological , Plant Leaves/metabolism , Seedlings , Salinity , Salt Tolerance , Antioxidants/metabolism
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