Determinants of physical performance and physiological responses during an Official cross-country marathon of mountain-biking (Xcm-Mtb) / Determinantes del rendimiento físico y las respuestas fisiológicas durante una maratón oficial de bicicleta de montaña a través del campo (XCM-MTB) / Determinantes do desempenho físico e as respostas fisiológicas durante uma maratona oficial de mountain bike cross-country (Xcm-Mtb)

Abstract: Introduction: The variables determinants of physical performance in cross-country marathon of mountain biking (XCMMTB) are still unknown. Objective: We aimed to verify the training control variables and the physiological responses in an official XCM-MTB race. Material and methods: 13 athletes (11 men and 2 women; 33.3 ± 12.7 years of age) participated in this study. It was conducted during an official XCM-MTB in Brazil (route of 70 km). The heart rate (HR), altimetry, velocity, temperature, pacing, and power were obtained every 10 km travelled by the STRAVA application. Multiple linear regression analysis was performed to verify whether the variables could predict physical performance. Results: The athletes maintained constant HR elevation in the corresponding zone 80% HRmax. They also presented a variation in the pacing (F = 35.82; p < 0.001; d = 0.66) and power (F = 7.20; p < 0.001; d = 0.18) showing higher values in the last 10 km. Only pacing can be considered a predictor of the physical performance (β = 0.958; t = 7.30; p < 0.001), specifically the one at 20 km (F = 10.23; p = 0.004; R2 = 0.82). Conclusion: The study concluded that the analyzed variables are reliable for the performance control in an official XCMMTB race. HR and power are variables that can be used to prescribe and control training, as they change according to the requirements of the race. Power can also be used as a performance predictor as it is directly influenced by terrain.

Resumen: Introducción: Las variables determinantes del rendimiento físico en una maratón de ciclismo de montaña (XCM-MTB) aún son desconocidas. Objetivo: Nuestro objetivo fue verificar las variables fisiológicas y de control del entrenamiento en una carrera oficial de XCM-MTB. Materiales y métodos: 13 atletas (11 hombres y 2 mujeres; 33,3 ± 12,7 años) participaron en este estudio. La investigación se realizó durante un XCM-MTB oficial en Brasil (recorrido de 70 km). La frecuencia cardíaca (FC), la altimetría, la velocidad, la temperatura, el ritmo y la potencia se obtuvieron cada 10 km recorridos por la aplicación STRAVA. Se realizó un análisis múltiple de regresión linear para verificar si las variables podían predecir el rendimiento físico. Resultados: Hubo una elevación constante de la FC correspondiente al 80 % de la FCmax. El ritmo presentó una variación (F = 35,82; p < 0,001; d = 0,66) y potencia (F = 7,20; p < 0,001; d = 0,18) con valores superiores en los últimos 10 km. Solo el ritmo a los 20 km (F = 10,23; p = 0,004; R2 = 0,82) puede considerarse predictor del rendimiento físico (β = 0,958; t = 7,30; p < 0,001). Conclusión: El estudio concluyó que las variables analizadas son fiables para la prescripción y control del entrenamiento en una carrera oficial de XCM-MTB. La FC y la potencia son variables que se pueden utilizar para prescribir el entrenamiento. La potencia también se puede utilizar para predecir el rendimiento, ya que está directamente influenciada por el terreno.

Resumo: Introdução: As variáveis determinantes do desempenho físico na maratona de mountain bike cross-country (XCMMTB) ainda são desconhecidas. Objetivo: Nosso objetivo foi verificar as variáveis de controle de treinamento e as respostas fisiológicas em uma corrida oficial de XCMMTB. Material e métodos: Participaram deste estudo 13 atletas (11 homens e 2 mulheres; 33,3 ± 12,7 anos de idade). O estudo foi realizado durante uma corrida oficial de XCM-MTB no Brasil (percurso de 70 km). A frequência cardíaca (FC), altimetria, velocidade, temperatura, ritmo e potência foram obtidos a cada 10 km percorridos através do aplicativo STRAVA. Foi realizada uma análise de regressão linear múltipla para verificar se as variáveis poderiam prever o desempenho físico. Resultados: Os atletas mantiveram uma elevação constante na FC na zona correspondente a 80% da FC máxima. Apresentaram também variação no ritmo (F = 35,82; p < 0,001; d = 0,66) e na potência (F = 7,20; p < 0,001; d = 0,18), mostrando valores mais altos nos últimos 10 km. Apenas o ritmo pode ser considerado um preditor do desempenho físico (β = 0,958; t = 7,30; p < 0,001), especificamente no ponto dos 20 km (F = 10,23; p = 0,004; R2 = 0,82). Conclusão: O estudo concluiu que as variáveis analisadas são confiáveis para o controle de desempenho em uma corrida oficial de XCMMTB. A FC e a potência são variáveis que podem ser usadas para prescrever e controlar o treinamento, pois mudam de acordo com as exigências da corrida. A potência também pode ser usada como um preditor de desempenho, pois é diretamente influenciada pelo terreno.

Factores asociados con la fragilidad en un servicio ambulatorio de geriatría de un hospital universitario en Bogotá (Colombia) / Factors Associated with Frailty in the Geriatric Outpatient Service of a University Hospital in Bogotá (Colombia) / Fatores associados à fragilidade no ambulatório de geriatria de um hospital universitário de Bogotá (Colômbia)

Introducción: la fragilidad, entendida como un estado previo a la discapacidad, confiere mayor vulnerabi-lidad a estresores externos y contribuye a desenlaces negativos como caídas, hospitalización, discapacidad y mortalidad. El objetivo de este estudio fue identificar su prevalencia y evaluar los factores asociados en los pacientes del Servicio Ambulatorio de Geriatría del Hospital Universitario San Ignacio (husi) en Bogotá (Colombia). Materiales y métodos: estudio de corte transversal con 689 pacientes atendidos en la consulta externa de geriatría del husi entre agosto de 2016 y marzo de 2020. Mediante regresiones logísticas se iden-tificaron los factores relacionados con la fragilidad. Resultados: la prevalencia fue del 35.4 %. En el análisis bivariado, las variables asociadas con la fragilidad fueron edad mayor de 80 años (or: 2.07; ic95 %: 1.40-3.20; p = 0.001), sexo femenino (or: 1.40; ic95 %: 0.99-2.02; p = 0.03), multimorbilidad (or: 2.13; ic95 %: 1.40-2.90; p < 0.001) y malnutrición (or: 2.23; ic95 %: 1.22-4.07; p = 0.009). En el análisis multivariado, la multimor-bilidad (or: 2.46; ic95 %: 1.62-3.75; p = 0.001), la velocidad de la marcha lenta (or: 5.15; ic95 %: 3.0-8.60; p = 0.001) y el perímetro de pantorrilla bajo (or: 1.60; ic95 %: 1.03-2.50; p = 0.06) se vincularon con la fragilidad. Conclusión: la prevalencia de fragilidad en el servicio de geriatría del husies mayor a la de los referentes nacionales; adicionalmente, las variables analizadas coinciden con las encontradas en la literatura; todo esto respecto a la gran complejidad clínica de los pacientes. Es clave la detección de los factores que se asocian con fragilidad, a fin de intervenirlos y prevenir desenlaces adversos

Introduction: Frailty, understood as a pre-disability state, increases vulnerability to external stressors and contributes to negative outcomes such as falls, hospitalization, disability, and mortality. This study aims to identify the prevalence of frailty and assess the associated factors in patients attending the geriatric outpatient service of the Hospital Universitario San Ignacio (husi). Materials and methods: A cross-sectional study involving 689 patients treated at the husigeriatric outpatient clinic between August 2016 and March 2020. Logistic regressions were conducted to identify factors associated with frailty. Results: The prevalence of frailty was 35.4 %. In bivariate analysis, variables associated with frailty included age over 80 years (or: 2.07; ci95 %: 1.40-3.20; p = 0.001), female sex (or: 1.40; ci95 %:0.99-2.02; p= 0.03), multimorbidity (or: 2.13; ci95 %:1.40-2.90; p < 0.001) and malnutrition (or: 2.23; ci95 %: 1.22-4.07; p = 0.009). In multivariate analysis, multimorbidity (or: 2.46; ci95 %: 1.62-3.75; p = 0.001), slow walking speed (or: 5.15; ci95 %: 3.0-8.60; p = 0.001) and low calf perimeter (or: 1.60; ci95 %: 1.03-2.50; p = 0.06) were associated with frailty. Conclusion: The prevalence of frailty in our center exceeds national references; and the identified variables align with those reported in the literature; reflecting the considerable clin-ical complexity of our patients. Detecting factors associated with frailty is crucial for intervention and prevention of adverse outcomes

ntrodução: a fragilidade, entendida como um estado anterior à incapacidade, confere maior vulnerabi-lidade a estressores externos e contribui para desfechos negativos como quedas, hospitalização, incapa-cidade e mortalidade. O objetivo deste estudo foi identificar a prevalência e avaliar os fatores associados à fragilidade em pacientes do ambulatório de geriatria do Hospital Universitário San Ignacio (husi) de Bogotá, Colômbia. Materiais e métodos: estudo transversal com 689 pacientes atendidos no ambulatório de geriatria do husi entre agosto de 2016 e março de 2020. Foram realizadas regressões logísticas para identificar fatores associados à fragilidade. Resultados: a prevalência de fragilidade foi de 35.4 %. Na análise bivariada, as variáveis associadas à fragilidade foram: idade acima de 80 anos (or:2.07; ic95 %:1.40-3,20; p = 0.001), gênero feminino (or:1.40; ic95 %:0.99-2.02; p = 0.03), multimorbidade (or: 2.13; ic95 %: 1.40-2.90; p < 0.001) e desnutrição (or:2.23; ic95 %:1.22-4.07; p = 0.009). Na análise multivariada, multimorbidade (or:2.46; ic95 %: 1.62-3.75; p = 0.001), velocidade lenta de caminhada (or:5.15; ic95 %:3.0-8.60; p = 0.001) e baixa circunferência da panturrilha (or: 1.60; ic95 %: 1.03-2.50; p = 0.06) foram associados à fragilidade. Conclusão: a prevalência de fragilidade no husi é superior à das referências nacionais; adicionalmente, as variáveis associadas coincidem com as encontradas na literatura; tudo isso em relação à grande complexidade clínica dos nossos pacientes. É fundamental detectar os fatores associados à fragilidade para intervir e prevenir resultados adversos

Ansiedad frente a exámenes, un tipo de ansiedad fóbica que se presenta en el contexto académico / Test anxiety, a type of phobic anxiety that occurs in the academic context

Experimentar ansiedad frente a exámenes desencadena una respuesta emocional acompañada de cambios fisiológicos que el estudiante siente ante una situación percibida como amenazante, específicamente ante una evaluación, examen escrito u oral; actualmente, se la cataloga dentro de las fobias específicas. El individuo que busca evitar o eludir dicho escenario cae en la conducta de procrastinación. Esto afecta su rendimiento académico y acarrea consecuencias graves de salud mental, el estudiante comienza a percibirse afectado en su autovalia, autoestima y en su ambiente social, que muchas veces lo lleva a contraer trastorno depresivo e ideación suicida. El presente artículo es un estudio de revisión bibliográfica y su objetivo fue describir la experiencia de la. ansiedad frente a exámenes como fobia específica situacional, las consecuencias de dicho padecimiento, su comorbilidad con otros trastornos psicológicos y los tratamientos disponibles. Fueron analizados y comparados unos 26 artículos científicos, basados en ensayos controlados de manera aleatoria, otros son estudios controlados de caso único, publicados en importantes revistas electrónicas de impacto. La búsqueda se realizó utilizando las palabras clave. Como conclusión, se destacó la importancia del conocimiento de esta patología, a fin de realizar un diagnóstico precoz y prevención en psicoterapia, evitando así un mayor deterioro en la salud mental de los estudiantes. No obstante, es necesaria la realización de más investigación controlada al respecto.

Experiencing test anxiety triggers an emotional response accompanied by physiological changes that the student feels in a situation perceived as threatening, specifically in the face of an evaluation, written or oral exam; Currently, it is classified as a specific phobia. The individual who seeks to avoid or avoid this scenario falls into procrastination behavior. This affects their academic performance and has serious mental health consequences. The student begins to feel affected in his or her self-worth, self-esteem, and social environment, which often leads him or her to contract a depressive disorder and suicidal ideation. This article is a bibliographic review study regarding experiencing test anxiety as a situational specific phobia, the consequences of said condition, its comorbidity with other psychological disorders and the available treatments. Some 26 scientific articles were analyzed and compared, based on randomized controlled trials, others are controlled single case studies, published in important impact electronic journals. The search was carried out using keywords. In conclusion, the importance of knowledge of this pathology was highlighted, in order to make an early diagnosis and prevention in psychotherapy, thus avoiding further deterioration in the mental health of students. However, more controlled research is needed in this regard.

Anthropometric Characteristics, Training Intensity Distribution, Physiological Profile and Performance of an Elite Trail Runner: A Longitudinal Case Study

SUMMARY: Trail running (TR), an extreme endurance sport, presents unique challenges due to the variety of terrain and distances, where physiological capacity and body composition have been considered better predictors of performance. This longitudinal case study examines the impact of training intensity distribution (TID) on an elite trail runner's physiological profile and performance over four years. Two TID models were implemented: polarized (POL) and pyramidal (PYR). Physiological assessments included maximal oxygen consumption (VO2max), lactate thresholds (LT1 and LT2), and anthropometric characteristics. The training was classified according to the 3-zone intensity model (zone 1: below the first lactate threshold; zone 2: between the first and second lactate threshold; zone 3: above the second lactate threshold). During the four years, the average TID distribution was 75 % zone 1, 18 % zone 2, and 7 % zone 3. Physiological capacity increased by 7.14 % (14 to 15 km/h) for velocity at LT1 (vLT1) and 8.13 % (16 to 17.3 km/h) for velocity at LT2 (vLT2). The most significant increases were observed during the second year when the percentage of training time in zone 1 was lower (65 %) and in zone 2 greater (30 %) than those reported in other years. Consequently, vLT1 and vLT2 increased by 3.5 % (from 14.1 to 14.6 km/h) and 3.6 % (from 16.5 to 17.1 km/h), respectively. In conclusion, this case study revealed that emphasizing training in zone 2 (moderate intensity) and increasing the training load significantly improved performance at lactate thresholds. Despite modifying body composition, no influence on improving endurance performance was observed. These findings underscore the importance of TID in elite trail runners and highlight the potential to optimize physiological adaptations and performance outcomes.

Trail running (TR), un deporte de resistencia extrema, presenta desafíos únicos debido a la variedad de terrenos y distancias, donde la capacidad fisiológica y la composición corporal se han considerado mejores predictores del rendimiento. Este estudio de caso longitudinal examina el impacto de la distribución de la intensidad del entrenamiento (TID) en el perfil fisiológico y el rendimiento de un corredor de montaña de élite durante cuatro años. Se implementaron dos modelos TID: polarizado (POL) y piramidal (PYR). Las evaluaciones fisiológicas incluyeron el consumo máximo de oxígeno (VO2max), los umbrales de lactato (LT1 y LT2) y las características antropométricas. El entrenamiento se clasificó según el modelo de intensidad de 3 zonas (zona 1: por debajo del primer umbral de lactato; zona 2: entre el primer y segundo umbral de lactato; zona 3: por encima del segundo umbral de lactato). Durante los cuatro años, la distribución TID promedio fue 75 % zona 1, 18 % zona 2 y 7 % zona 3. La capacidad fisiológica aumentó un 7,14 % (14 a 15 km/h) para la velocidad en LT1 (vLT1) y un 8,13 % (16 a 17,3 km/h) para velocidad en LT2 (vLT2). Los incrementos más significativos se observaron durante el segundo año cuando el porcentaje de tiempo de entrenamiento en la zona 1 fue menor (65 %) y en la zona 2 mayor (30 %) que los reportados en otros años. En consecuencia, vLT1 y vLT2 aumentaron un 3,5 % (de 14,1 a 14,6 km/h) y un 3,6 % (de 16,5 a 17,1 km/h), respectivamente. En conclusión, este estudio reveló que enfatizar el entrenamiento en la zona 2 (intensidad moderada) y aumentar la carga de entrenamiento mejoró significativamente el rendimiento en los umbrales de lactato. A pesar de modificar la composición corporal, no se observó influencia en la mejora del rendimiento de resistencia. Estos hallazgos subrayan la importancia del TID en los corredores de trail de élite y resaltan el potencial para optimizar las adaptaciones fisiológicas y los resultados de rendimiento.

Frequência e distribuição do gene da α-actinina-3 e sua associação em atletas brasileiras de voleibol / Frequency and distribution of the α -actinin-3 gene and its association in brazilian volleyball athletes

Introduction: The ACTN3 gene encodes the α-actinin-3 protein in the Z lines of the sarcomere, which anchors the actin protein in the contractile apparatus, present exclusively in type II muscle fibers, presenting greater glycolytic capacity, which is essential for sports with high-energy actions. intensity and short duration as is the case with Volleyball. Objective: To verify the frequency and distribution of the ACTN3 gene, RR and RX genotypes that express α-actinin-3 (EX α-actinin-3), and XX genotype that do not express α-actinin-3 (NE α-actinin-3) and its association with Brazilian volleyball athletes. Materials and Methods: Nine-seven (97) athletes from the women's volleyball super league took part in the study. Body mass, height and age were evaluated to characterize the sample. Salivary samples were analyzed using (PCR) in real time, to determine the genotypes, and, to verify the association of the genotype with the status of volleyball athlete in the three categories (National Teams, Brazilian National Team and Brazilian Olympic Team), the test was carried out Chi-square of independence (χ²). To obtain the odds ratio of the outcome, a log linear regression analysis was performed. All tests were carried out using the JAMOVI 2.4 (2023) statistical software. Results: Among the athletes in the sample competing in the National Teams competition, 91.8% have the EX-α-actinin-3 genotype. When we consider Brazilian National Team competitions, 93.7% have the EX-α-actinin-3 genotype. Athletes who play for the Brazilian Olimpic Team, 100% of the sample have the EX-α-actinin-3 genotype. Considering that in the world population, the frequency is 80%, it is possible to verify that as you approach the athletes who participate in the women's team there is a greater participation of athletes with the EX-α-actinin-3 genotype. Furthermore, there was an association between the genotypes that EX α-actinin-3 and the National category, with the status of elite athlete, where (χ²) obtained the p value (0.023) and the rate ratio (2.71) for the outcome of the genotypes (EX α-actinin-3) being elite athletes. Conclusion: The athlete's genetic characteristics, environment, nutrition, physical, technical and tactical preparation are some of the factors that contribute to sports performance. However, the results of the present study suggest that athletes with RR and RX genotypes that express α-actinin-3, present in type II muscle fibers, seem to confer an advantage when playing high-performance volleyball.

Evaluación de la condición física y salud escolar en niños y niñas de la provincia de San Luis, Argentina / Assessment of children's physical fitness and school health in the province of San Luis, Argentina

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.

Incontinencia urinaria en trabajadoras de la salud como factor predisponente de presentismo en Chile: estudio exploratorio de método mixto / Urinary incontinence in health workers as a predisposing factor for presenteeism in Chile: A mixed-methods exploratory study

Introducción La incontinencia urinaria impacta de forma negativa la calidad de vida de quienes la padecen y puede perjudicar las actividades laborales, siendo causante de presentismo en las profesionales de salud. Esto puede implicar la disminución en la calidad de la atención y seguridad de la/el paciente. El objetivo del presente estudio es explorar la autopercepción de las trabajadoras de salud que padecen incontinencia urinaria como factor predisponente de presentismo. Métodos Estudio mixto de carácter exploratorio-descriptivo. La muestra fue seleccionada de forma no probabilística e intencionada por criterio y conveniencia con un tamaño de 14 voluntarias, considerando la saturación de la información. Para el proceso y análisis de datos temáticos se consideraron los criterios de confiabilidad definidos por Guba. Resultados Muestra con edad media de 38,9 + 7,1 años y un puntaje de SPS-6 medio de 15,8 + 3,5 puntos, mostrando mayor alteración en la dimensión de evitar la desconcentración. Las narrativas presentes en el caso estudiado aportaron información relevante de cómo la incontinencia urinaria afecta el desempeño laboral de las trabajadoras de salud a través de la interrupción en su jornada, disminución en la calidad de la atención clínica, como también el aumento de su ansiedad respecto a su entorno. Conclusiones Dado que la incontinencia urinaria y el presentismo son experiencias subjetivas y multidimensionales, al igual que el efecto negativo en el desempeño laboral, se recomienda un estudio que permita identificar variables predictoras y las pérdidas económicas asociadas a esta condición. Con ello se buscaría establecer mejoras en el ambiente laboral, así como en el autocuidado de funcionarias, procurando mayores beneficios y mejores niveles de eficiencia en la organización.

Introduction Urinary incontinence negatively impacts the quality of life and can harm work activities, causing presenteeism in health professionals and decreasing the quality of care and patient safety. The objective of this study is to explore the self-perception of health workers who suffer from urinary incontinence as a predisposing factor for presenteeism. Methods Mixed study of an exploratory-descriptive nature. The sample was selected in a non-probabilistic and intentional way by criterion and convenience with a size of 14 volunteers, considering the saturation of the information. Reliability criteria defined by Guba for the process and analysis of thematic data were considered. Results The sample had a mean age of 38.9 + 7.1 years and a mean SPS-6 score of 15.8 + 3.5 points, showing alteration in the dimension of avoiding deconcentration. The narratives in the case study provide relevant information on how urinary incontinence affects the work performance of health workers through the interruption in their day, decreases the quality of clinical care, and increases their anxiety regarding their environment. Conclusions Urinary incontinence and presenteeism are subjective, and multidimensional experiences affect work performance. Therefore, further studies are recommended to identify predictor variables and the economic losses associated with this condition to establish improvements in the work environment and the self-care of female employees seeking greater benefits and better levels of efficiency in the organization

Could nanotechnology improve exercise performance? Evidence from animal studies

Abstract This review provides the current state of knowledge regarding the use of nutritional nanocompounds on exercise performance. The reviewed studies used the following nanocompounds: resveratrol-loaded lipid nanoparticles, folic acid into layered hydroxide nanoparticle, redox-active nanoparticles with nitroxide radicals, and iron into liposomes. Most of these nutritional nanocompounds seem to improve performance in endurance exercise compared to the active compound in the non-nanoencapsulated form and/or placebo. Nutritional nanocompounds also induced the following physiological and metabolic alterations: 1) improved antioxidant activity and reduced oxidative stress; 2) reduction in inflammation status; 3) maintenance of muscle integrity; 4) improvement in mitochondrial function and quality; 5) enhanced glucose levels during exercise; 6) higher muscle and hepatic glycogen levels; and 7) increased serum and liver iron content. However, all the reviewed studies were conducted in animals (mice and rats). In conclusion, nutritional nanocompounds are a promising approach to improving exercise performance. As the studies using nutritional nanocompounds were all conducted in animals, further studies in humans are necessary to better understand the application of nutritional nanocompounds in sport and exercise science.

Evaluation by community health agents of the attributes of Primary Health Care for fighting leprosy: a cross-sectional study

OBJECTIVE: To evaluate whether the attributes of Primary Healthcare are present in leprosy control actions in Londrina from Community Health Workers' (CHW) perspectives. METHOD: Observational and evaluative study. Data collection occurred between January and March 2020 in Londrina, Paraná, using the questionnaire "Primary Care Assessment Tool (PCATool) - Hansen's disease - CHW version" and a population-based census of 246 CHWs from 52 Primary Healthcare Units. The analyses used a cutoff point (≥ 6.6), central tendency, and dispersion measures. One-way ANOVA and Tukey's post hoc tests were used to analyze differences. Results: The general performance towards the primary healthcare attributes were evaluated as strong (mean = 6.95 / SD = 1.08) and the essential score (mean = 7.39 / SD = 1.0). On the other hand, the derived score was evaluated as poor (mean = 6.07 / sd = 1.06). Concerning the Access attribute, the rural zone had a lower score than the urban (mean = 4.47 / SD = 1.63). Conclusion: The study highlights issues that can be improved, such as first contact access, catalog of services offered to leprosy patients, information provided to the community, professional training, and differences in PHC performance between urban and rural regions.

Antioxidant activity, cytotoxicity, phenolic content, and phytochemical composition of Pithecellobium Diversifolium benth: a pilot study / Atividade antioxidante, citotóxica, conteúdo fenólico e composição fitoquímica de Pithecellobium Diversifolium benth: um estudo piloto / Actividad antioxidante, citotóxica, contenido fenólico y composición fitoquímica de Pithecellobium Diversifolium benth: un estudio piloto

Species of Pithecellobium (Fabaceae) are used in traditional medicine to treat diabetes, cough, bronchitis, and inflammation. This study aims to evaluate the content and determine the antioxidant activity, phenolic compounds content, and cytotoxicity of the extract and the fractions of Pithecellobium diversifolium. This is unprecedented research with an exotic species from the Caatinga, northeastern Brazil, using High-performance Liquid Chromatography-Electrospray Ionization-Mass Spectrometry (HPLC-ESI-MS). The MeOH fractions of leaves and stem barks showed a high content of flavonoids (198.1 ± 106.50 and 542.7 ± 2.52 mg EqQ/g). The CH2Cl2 fraction of peels showed a high content of total phenolic compounds (516.7 ± 3.00 mg EqAG /g). The DPPH test showed that the CH2Cl2 fraction (leaves) held an EC50 of 0.08 ± 0.02, a higher value than that observed for the standards used in the test­Butylated hydroxyanisole (BHA), Butylated hydroxytoluene (BHT), and ascorbic acid. The AcOEt and MeOH fractions of peels presented moderate cytotoxicity with values below 500 µg/mL. The MeOH fraction of leaves showed seven major compounds: myricetin, quercetin, quercetin-arabinofuranoside, apigenin-triglycosides, and apigenin-diglucoside, being the last three unpublished in studies involving the genus. The tests conducted in this study show the potential of P. diversifolium as a promising source of biomolecules with therapeutic applicability.

Espécies de Pithecellobium (Fabaceae) são usadas na medicina tradicional para tratar diabetes, tosse, bronquite e inflamação. Este estudo teve como objetivo avaliar o teor e determinar a atividade antioxidante, o teor de compostos fenólicos e a citotoxicidade do extrato e das frações de Pithecellobium diversifolium, uma pesquisa inédita com uma espécie exótica da Caatinga do Nordeste do Brasil, utilizando a instrumentação Clae-IES. As frações MeOH das folhas e cascas do caule apresentaram alto teor de flavonoides (198,1 ± 106,50 e 542,7 ± 2,52 mg EqQ/g). A fração CH2Cl2 das cascas apresentou um elevado teor de compostos fenólicos totais (516,7 ± 3,00 mg EqAG/g). O teste DPPH mostrou que a fração CH2Cl2 (folhas) apresentou um EC50 de 0,08 ± 0,02, valor superior ao observado para os padrões utilizados no teste ­ Butil hidroxianisol (BHA), Butil hidroxitolueno (BHT) e ácido ascórbico. As frações AcOEt e MeOH das cascas apresentaram citotoxicidade moderada com valores inferiores a 500 µg/mL. A fração MeOH das folhas apresentou sete compostos majoritários: miricetina, quercetina, quercetina-arabinofuranosídeo, apigenina-triglicosídeos e apigenina-diglucosídeo, sendo os três últimos inéditos em estudos envolvendo o gênero. Os testes realizados demonstram o potencial de P. diversifolium, uma promissora fonte de biomoléculas com aplicabilidade terapêutica.

Las especies de Pithecellobium (Fabaceae) se utilizan en la medicina tradicional para tratar diabetes, tos, bronquitis e inflamación. Este estudio tuvo como objetivo evaluar el contenido y determinar la actividad antioxidante, el contenido de compuestos fenólicos y la citotoxicidad del extracto y de las fracciones de Pithecellobium diversifolium, un estudio inédito con una especie exótica de la Caatinga de la región Nordeste de Brasil, que utilizó la instrumentación HPLC-ESI. Las fracciones MeOH de hojas y cortezas de tallo mostraron un alto contenido de flavonoides (198,1 ± 106,50 y 542,7 ± 2,52 mg EqQ/g). La fracción CH2Cl2 de las cortezas presentó un alto contenido de compuestos fenólicos totales (516,7 ± 3,00 mg EqAG/g). El ensayo DPPH mostró que la fracción CH2Cl2 (hojas) tenía EC50 de 0,08 ± 0,02, valor superior a lo observado para los estándares utilizados en el ensayo ­Butilhidroxianisol (BHA), butilhidroxitolueno (BHT) y ácido ascórbico. Las fracciones AcOEt y MeOH de las cortezas presentaron una citotoxicidad moderada con valores inferiores a 500 µ g/mL. La fracción MeOH de las hojas contiene siete compuestos principales: miricetina, quercetina, quercetina-arabinofuranosido, apigenina-triglucósidos y apigenina-diglucósido, de los cuales los tres últimos son inéditos en estudios sobre el género. Las pruebas realizadas demuestran el potencial de P. diversifolium, una fuente prometedora de biomoléculas con aplicabilidad terapéutica.

Increased yield performance of mutation induced Soybean genotypes at varied agro-ecological conditions

Abstract In soybean breeding program, continuous selection pressure on traits response to yield created a genetic bottleneck for improvements of soybean through hybridization breeding technique. Therefore an initiative was taken to developed high yielding soybean variety applying mutation breeding techniques at Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh. Locally available popular cultivar BARI Soybean-5 was used as a parent material and subjected to five different doses of Gamma ray using Co60. In respect to seed yield and yield attributing characters, twelve true breed mutants were selected from M4 generation. High values of heritability and genetic advance with high genotypic coefficient of variance (GCV) for plant height, branch number and pod number were considered as favorable attributes for soybean improvement that ensure expected yield. The mutant SBM-18 obtained from 250Gy provided stable yield performance at diversified environments. It provided maximum seed yield of 3056 kg ha-1 with highest number of pods plant-1 (56). The National Seed Board of Bangladesh (NSB) eventually approved SBM-18 and registered it as a new soybean variety named Binasoybean-5 for large-scale planting because of its superior stability in various agro-ecological zones and consistent yield performance.

Resumo No programa de melhoramento da soja, a pressão pela seleção contínua para a resposta das características de rendimento criou um gargalo genético para melhorias da soja por meio da técnica de melhoramento por hibridação. Portanto, foi desenvolvida uma variedade de soja de alto rendimento, aplicando técnicas de reprodução por mutação, na Divisão de Melhoramento de Plantas, no Instituto de Agricultura Nuclear de Bangladesh (BINA), em Bangladesh. A cultivar popular BARI Soybean-5, disponível localmente, foi usada como material original e submetida a cinco doses diferentes de raios gama usando Co60. Em relação ao rendimento de sementes e às características de atribuição de rendimento, 12 mutantes genuínos foram selecionados a partir da geração M4. Altos valores de herdabilidade e avanço genético com alto coeficiente de variância genotípico (GCV) para altura da planta, número de ramos e número de vagens foram considerados atributos favoráveis ao melhoramento da soja, garantindo, assim, a produtividade esperada. O mutante SBM-18, obtido a partir de 250Gy, proporcionou desempenho de rendimento estável em ambientes diversificados e produtividade máxima de sementes de 3.056 kg ha-1 com o maior número de vagens planta-1 (56). O Conselho Nacional de Sementes de Bangladesh (NSB) finalmente aprovou o SBM-18 e o registrou como uma nova variedade de soja, chamada Binasoybean-5, para plantio em larga escala por causa de sua estabilidade superior em várias zonas agroecológicas e desempenho de rendimento consistente.

Evaluation of Mexican sunflower (Helianthus annus l) leaf meal as a feed ingredient in shaver brown pullets

Abstract The use of alternative nutritional sources is an important topic for animal production such as poultry. This study examined the effect of replacing soybean meal with sunflower leaf meal in the diet of laying shaver brown pullets. A total of 30 laying birds were assigned to three treatments of 0% (as control group), 10% and 15% MSFLM inclusion. Four eggs per replicate were randomly taken for three consecutive days at two weeks interval for five times, and 18 weeks individuals were selected after 40 days of experimental time. External parameters of the eggs (egg weight, egg length, egg breadth and egg shape index, shell thickness), and body parameters (Final body weight, weight gain), feed intake and hen day production were measured. For egg length, egg breadth and shell thickness showed significant difference (p 0.05) in from the control birds. Final body weight, weight gain, feed intake and hen day production showed comparable results with values from eggs of birds on control diet. The study revealed the ability of birds to easily utilize the nutrients in the protein sources. MSFLM utilization up to 15% in pullets diet revealed no detrimental effect on the performance of the laying birds and the external qualities of eggs produced.

Resumo O uso de fontes nutricionais alternativas é um tópico importante para a produção animal, como a avicultura. Este estudo examinou o efeito da substituição do farelo de soja por farelo de folha de girassol na dieta de frangas marrons barbeadoras poedeiras. Um total de 30 aves poedeiras foram designadas a três tratamentos de 0% (como grupo controle), 10% e 15% de inclusão MSFLM. Quatro ovos por repetição foram retirados aleatoriamente por três dias consecutivos em intervalos de duas semanas por cinco vezes, e indivíduos de 18 semanas foram selecionados após 40 dias do tempo experimental. Parâmetros externos dos ovos (peso do ovo, comprimento do ovo, largura do ovo e índice de forma do ovo, espessura da casca) e parâmetros corporais (peso corporal final, ganho de peso), consumo de ração e produção diária da galinha foram medidos. Para comprimento do ovo, largura do ovo e espessura da casca apresentaram diferença significativa (p 0,05) nas aves controle. Peso corporal final, ganho de peso, consumo de ração e produção de dia de galinha mostraram resultados comparáveis com valores de ovos de aves em dieta controle. O estudo revelou a capacidade das aves de utilizar facilmente os nutrientes das fontes de proteína. A utilização de MSFLM até 15% na dieta das frangas não revelou nenhum efeito prejudicial no desempenho das aves poedeiras e nas qualidades externas dos ovos produzidos.

Qualitative and Quantitative Analysis of Chemical Constituents in Liu Junzitang by UPLC-Q-TOF-MS/MS and UPLC / 中国实验方剂学杂志

ObjectiveTo establish a qualitative and quantitative analysis method for chemical constituents in Liu Junzitang（LJZT）， and to clarify its material basis. MethodThe chemical constituents in LJZT were analyzed by ultra performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS/MS）， and the resulting compounds were identified by using databases， such as MassBank， PubChem， ChemSpider， Traditional Chinese Medicine Systems Pharmacology Database and Analytical Platform（TCMSP）， and by combining with relevant literature. UPLC was used to establish a quantitative method for analysis of 9 compounds in LJZT， including liquiritin， hesperidin， lobetyolin， liquiritigenin， glycyrrhizic acid， nobiletin， tangeretin， atractylenolide Ⅱ and Ⅰ. ResultBy combining the relevant literature， database and MS information， a total of 79 compounds were identified from LJZT， including 31 flavonoids， 15 terpenoids， 14 nitrogen-containing compounds， 6 phenylpropanoids， 6 organic acids and 7 other compounds. The established quantitative analytical method for the nine representative components showed good linearity within their respective linear ranges， and the precision， stability， reproducibility and recovery were in accordance with the requirements. The quantitative results showed that the contents of liquiritin， hesperidin， lobetyolin， liquiritigenin， glycyrrhizic acid， nobiletin， tangeretin， atractylenolide Ⅱ and Ⅰ in LJZT were 0.376 5， 2.602 1， 0.082 6， 0.128 1， 1.778 6， 0.015 7， 0.006 7， 0.030 4， 0.003 2 mg·g-1， respectively. ConclusionThe established method can quickly， sensitively and accurately analyze the chemical constituents in LJZT， clarify that the material basis of LJZT is mainly flavonoids， terpenoids and nitrogen-containing compounds， and simultaneously determine the contents of the 9 components， which can lay a foundation for the research on quality control， mechanism and clinical application of LJZT.

Optimization of Decoction Technology and Establishment of Quality Standard for Moringa oleifera Leaf Standard Decoction / 中国实验方剂学杂志

ObjectiveBased on response surface methodology combined with principal component analysis（PCA）， the optimal decocting process of Moringa oleifera leaf standard decoction was optimized， and its multi-index quality evaluation system was established， in order to provide scientific basis for the quality control of this standard decoction. MethodResponse surface methodology and PCA were used to optimize the decoction process by taking the relative peak areas of 8 characteristic peaks and dry extract yield as indexes. Based on this， the quality of 15 batches of the standard decoction was evaluated by high performance liquid chromatography（HPLC） characteristic chromatogram， determination of major components（neochlorogenic acid， L-tryptophan， cryptochlorogenic acid， vicenin-2， isoquercetin， astragalin）， determination of active parts（total flavonoids， total organic acids， total polysaccharides， total α-amino acids， total sinapine）， dry extract yield， specific gravity and pH. ResultThe optimal decocting process was to soak M. oleifera leaves（100.00 g） for 30 min and decoct twice with the first decoction of 12 times the amount of water for 30 min and the second decoction of 10 times the amount of water for 20 min. Standard decoction containing 0.2 g·mL-1 of crude drug was defined by x¯±30%， the specific gravity was 0.722-1.340， pH was 3.86-7.16， dry extract yield was 23.1%-42.9%， and the alcohol-soluble extract content was 8.26%-15.34%. Calculated according to the dried products of the standard decoction， the contents of neochlorogenic acid， L-tryptophan， cryptochlorogenic acid， vicenin-2， isoquercetin and astragalin were 1.99-3.69， 1.20-2.22， 1.44-2.67， 0.53-0.99， 2.45-4.55， 1.22-2.26 mg·g-1， the relative transfer rates relative to the herbs were 34.37%-63.83%， 62.43%-115.94%， 64.65%-120.06%， 56.98%-105.82%， 37.46%-69.57%， 41.81%-77.64%， respectively. The contents of total flavonoids， total organic acids， total polysaccharides， total α-amino acids， total sinapine were 10.19-18.92， 11.82-21.96， 94.07-174.71， 42.69-79.27， 9.55-17.73 mg·g-1， the relative transfer rates for herbs were 25.72%-47.77%， 41.78%-77.59%， 64.90%-120.54%， 42.30%-78.57%， 34.99%-64.99%， respectively. ConclusionThe optimized decocting technology of M. oleifera leaf standard decoction is stable and feasible， and the established multi-indicator quality evaluation system can lay the foundation for the quality control of this standard decoction.

Increased yield performance of mutation induced Soybean genotypes at varied agro-ecological conditions / Aumento no desempenho de rendimento de genótipos de soja induzidos por mutação em condições agroecológicas variadas

Abstract In soybean breeding program, continuous selection pressure on traits response to yield created a genetic bottleneck for improvements of soybean through hybridization breeding technique. Therefore an initiative was taken to developed high yielding soybean variety applying mutation breeding techniques at Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh. Locally available popular cultivar BARI Soybean-5 was used as a parent material and subjected to five different doses of Gamma ray using Co60. In respect to seed yield and yield attributing characters, twelve true breed mutants were selected from M4 generation. High values of heritability and genetic advance with high genotypic coefficient of variance (GCV) for plant height, branch number and pod number were considered as favorable attributes for soybean improvement that ensure expected yield. The mutant SBM-18 obtained from 250Gy provided stable yield performance at diversified environments. It provided maximum seed yield of 3056 kg ha-1 with highest number of pods plant-1 (56). The National Seed Board of Bangladesh (NSB) eventually approved SBM-18 and registered it as a new soybean variety named 'Binasoybean-5' for large-scale planting because of its superior stability in various agro-ecological zones and consistent yield performance.

Resumo No programa de melhoramento da soja, a pressão pela seleção contínua para a resposta das características de rendimento criou um gargalo genético para melhorias da soja por meio da técnica de melhoramento por hibridação. Portanto, foi desenvolvida uma variedade de soja de alto rendimento, aplicando técnicas de reprodução por mutação, na Divisão de Melhoramento de Plantas, no Instituto de Agricultura Nuclear de Bangladesh (BINA), em Bangladesh. A cultivar popular BARI Soybean-5, disponível localmente, foi usada como material original e submetida a cinco doses diferentes de raios gama usando Co60. Em relação ao rendimento de sementes e às características de atribuição de rendimento, 12 mutantes genuínos foram selecionados a partir da geração M4. Altos valores de herdabilidade e avanço genético com alto coeficiente de variância genotípico (GCV) para altura da planta, número de ramos e número de vagens foram considerados atributos favoráveis ​​ao melhoramento da soja, garantindo, assim, a produtividade esperada. O mutante SBM-18, obtido a partir de 250Gy, proporcionou desempenho de rendimento estável em ambientes diversificados e produtividade máxima de sementes de 3.056 kg ha-1 com o maior número de vagens planta-1 (56). O Conselho Nacional de Sementes de Bangladesh (NSB) finalmente aprovou o SBM-18 e o registrou como uma nova variedade de soja, chamada 'Binasoybean-5', para plantio em larga escala por causa de sua estabilidade superior em várias zonas agroecológicas e desempenho de rendimento consistente.

Evaluation of Mexican sunflower (Helianthus annus l) leaf meal as a feed ingredient in shaver brown pullets / Avaliação do girassol mexicano (Helianthus annus l) farinha de folha como ingrediente de ração em frangas marrons shaver

The use of alternative nutritional sources is an important topic for animal production such as poultry. This study examined the effect of replacing soybean meal with sunflower leaf meal in the diet of laying shaver brown pullets. A total of 30 laying birds were assigned to three treatments of 0% (as control group), 10% and 15% MSFLM inclusion. Four eggs per replicate were randomly taken for three consecutive days at two weeks interval for five times, and 18 weeks individuals were selected after 40 days of experimental time. External parameters of the eggs (egg weight, egg length, egg breadth and egg shape index, shell thickness), and body parameters (Final body weight, weight gain), feed intake and hen day production were measured. For egg length, egg breadth and shell thickness showed significant difference (p< 0.05) in from the control birds. Final body weight, weight gain, feed intake and hen day production showed comparable results with values from eggs of birds on control diet. The study revealed the ability of birds to easily utilize the nutrients in the protein sources. MSFLM utilization up to 15% in pullets' diet revealed no detrimental effect on the performance of the laying birds and the external qualities of eggs produced.

O uso de fontes nutricionais alternativas é um tópico importante para a produção animal, como a avicultura. Este estudo examinou o efeito da substituição do farelo de soja por farelo de folha de girassol na dieta de frangas marrons barbeadoras poedeiras. Um total de 30 aves poedeiras foram designadas a três tratamentos de 0% (como grupo controle), 10% e 15% de inclusão MSFLM. Quatro ovos por repetição foram retirados aleatoriamente por três dias consecutivos em intervalos de duas semanas por cinco vezes, e indivíduos de 18 semanas foram selecionados após 40 dias do tempo experimental. Parâmetros externos dos ovos (peso do ovo, comprimento do ovo, largura do ovo e índice de forma do ovo, espessura da casca) e parâmetros corporais (peso corporal final, ganho de peso), consumo de ração e produção diária da galinha foram medidos. Para comprimento do ovo, largura do ovo e espessura da casca apresentaram diferença significativa (p <0,05) nas aves controle. Peso corporal final, ganho de peso, consumo de ração e produção de dia de galinha mostraram resultados comparáveis ​​com valores de ovos de aves em dieta controle. O estudo revelou a capacidade das aves de utilizar facilmente os nutrientes das fontes de proteína. A utilização de MSFLM até 15% na dieta das frangas não revelou nenhum efeito prejudicial no desempenho das aves poedeiras e nas qualidades externas dos ovos produzidos.

Research on Material Basis of Homologous and Heterogeneous Effect of Aurantii Fructus Immaturus and Aurantii Fructus Based on Total Statistical Moment Analysis and Molecular Connectivity Index / 中国实验方剂学杂志

ObjectiveTo investigate the material basis of homologous and heterogeneous effect of Aurantii Fructus Immaturus（AFI） and Aurantii Fructus（AF） based on the total statistical moment analysis and molecular connectivity index（MCI）. MethodRelevant literature at home and abroad and Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform（TCMSP） were consulted to establish the chemical composition database of AFI and AF， and set up their fingerprints by ultra-high performance liquid chromatography（UPLC）， and the total statistical moments and similarity parameters of the fingerprint were calculated. According to MCI， all components of AFI and AF were divided into different component groups， the average values of 0-8th order（0χ-8χ） MCI of the common component groups of AFI and AF were calculated. ResultThe values of total zero-order moment（AUCT） of AFI and AF were （10.57±2.45）×106， （5.09±0.89）×106 μV·s， the values of total first-order moment（MCRTT） were （11.57±1.58）， （12.10±1.29） min， the values of total second-order moments（VCRTT） were（24.49±2.30）， （26.49±2.54） min2， respectively. It showed that qualitative and quantitative parameters of AFI and AF were significantly different. The components with high similarity such as neohesperidin， hesperidin and narirutin were screened as the common potential pharmacodynamic components of AFI and AF. The non-common components of AFI， such as alysifolinone and imperatorin， and the non-common components of AF， such as neoeriocitrin and isosakuranin， with high similarity were screened out as potential heterogeneous components of AFI and AF. The composition groups of AFI and AF were classified into six categories， and the similarities between the composition groups of AFI and AF and the total constituents were 0.872-0.979 and 0.918-0.997， the average values of 0χ-8χ MCI of alkaloids in AFI and AF were 3.65 and 3.14， the average values of 0χ-8χ MCI of flavonoids were 8.47 and 8.47， the average values of 0χ-8χ MCI of volatile oils were 2.71 and 3.48， respectively. It showed that there were some differences in MCI of chemical constituents（groups） between AFI and AF. ConclusionThe chemical constituents（groups） of AFI and AF not only differ in content and species， but also in structural characteristics and structure-activity relationship， which can provide a basis for further explaining the scientific connotation of homologous and heterogeneous effect of AFI and AF.

Analysis of Antidepressant Quality Markers of Bupleuri Radix Before and After Vinegar-processing Based on UPLC-Q-TOF-MS and Network Pharmacology / 中国实验方剂学杂志

ObjectiveTo analyze the antidepressant quality markers（Q-Marker） of Bupleuri Radix（BP） before and after vinegar-processing by ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS）， multivariate statistical analysis and network pharmacology. MethodUPLC-Q-TOF-MS was used to analyze the chemical basis of raw and vinegar-processed products of BP， and principal component analysis（PCA） orthogonal partial least squares-discriminant analysis（OPLS-DA） were used to identify the differential components in BP that changed significantly before and after vinegar-processing， which were regarded as candidate quality markers（Q-Marker）. Then the disease-drug-component-target network related to antidepressant effect of BP was constructed by network pharmacology， and the antidepressant Q-Marker of raw and vinegar-processed products of BP was determined. Rats were randomly divided into blank group， model group， fluoxetine group（2.67 mg·kg-1） and total saponin group（0.72 mg·kg-1）， except the blank group， rats in the other groups were subjected to chronic unpredictable mild stress（CUMS）. Three weeks after the start of modeling， rats in each administration group were given the corresponding dose of drugs once a day for 4 weeks， and rats in the blank and model groups were given normal saline with dose of 10 mL·kg-1. At 1 day before modeling， 21 days and 28 days after administration， body mass weighing， sucrose preference test and open field test were performed on each group . After 28 days of administration， real-time fluorescence quantitative polymerase chain reaction（Real-time PCR） was used to detect the mRNA expression levels of phosphatidylinositol 3-kinase（PI3K）， protein kinase B（Akt）， mammalian target of rapamycin（mTOR）， glycogen synthase kinase-3β（GSK-3β）， forkhead box transcription factor O3a（FoxO3a） and β-catenin in hippocampal tissues of rats in each group， while protein expression levels of PI3K， Akt， mTOR and FoxO3a in hippocampal tissues of rats in each group were detected by Western blot. ResultThere were 19 components in BP showed significant changes before and after vinegar-processing， and 9 components such as saikosaponin A， saikosaponin B1， saikosaponin B2， saikosaponin C and saikosaponin D were identified as potential Q-Marker through S-plot differential marker screening. Combined with the disease-drug-component-target network， saikosaponin A， saikosaponin B1， saikosaponin B2 and saikosaponin D were identified as antidepressant Q-Marker of raw and vinegar-processed products of BP. According to the results of pharmacodynamic tests， after 28 d of administration， compared with the blank group， the body mass， sucrose preference index and open field total score of rats in model group， fluoxetine group and total saponin group decreased significantly（P<0.01）. Compared with the model group， the body mass， sucrose preference index and open field total score in total saponin group increased significantly（P<0.01）. Compared with the blank group， mRNA expression levels of PI3K， Akt， mTOR and β-catenin in hippocampus of rats in the model group decreased significantly（P<0.05）， while mRNA expression levels of GSK-3β and FoxO3a increased significantly（P<0.05）. Compared with the model group， mRNA expression levels of PI3K， Akt， mTOR and β-catenin in hippocampus of rats in the total saponin group were increased significantly（P<0.05）， while mRNA expression levels of GSK-3β and FoxO3a decreased significantly（P<0.05）. Compared with the blank group， the protein expression levels of Akt and mTOR in hippocampus of the model group decreased significantly（P<0.01）， while the protein expression levels of PI3K and FoxO3a increased significantly（P<0.01）. Compared with the model group， the expression level of Akt in hippocampus of the total saponin group increased significantly（P<0.01）， the mTOR expression level was increased but not statistically significant， while the protein expression levels of PI3K and FoxO3a decreased significantly（P<0.01）. ConclusionThe chemical constituents of BP changed greatly after vinegar-processing， and the antidepressant Q-Marker of raw and vinegar-processed products of BP was determined by chemical basis， pharmacodynamics， network pharmacology and signaling pathway， which provided a reference for further research on quality control， pharmacodynamic substance basis and processing mechanism of BP.

Analysis on Components Absorbed into Blood and Cerebrospinal Fluid of Schisandrae Chinensis Fructus Based on Sequential Metabolism / 中国实验方剂学杂志

ObjectiveTo identify the prototypical components and metabolites absorbed into blood and cerebrospinal fluid of Schisandrae Chinensis Fructus（SCF） based on sequential metabolism combined with liquid chromatography-mass spectrometry. MethodBlood and cerebrospinal fluid samples of integrated metabolism， intestinal metabolism and hepatic metabolism were collected from male SD rats after gavage and in situ intestinal perfusion administration， and ultra-performance liquid chromatography-quadrupole/electrostatic field orbitrap high-resolution mass spectrometry（UPLC Q-Exactive Orbitrap MS） was used to analyze and compare the differences in the spectra of SCF extract， blank plasma， administered plasma， blank cerebrospinal fluid and administered cerebrospinal fluid with ACQUITY UPLC BEH Shield RP18 column（2.1 mm×100 mm， 1.7 µm）， the mobile phase was acetonitrile（A）-0.1% formic acid aqueous solution（B） for gradient elution（0-7 min， 95%B； 7-12 min， 95%-35%B； 12-17 min， 35%-15%B； 17-20 min， 15%-12%B； 20-22 min， 12%-5%B； 22-23 min， 5%B； 23-25 min， 5%-95%B； 25-28 min， 95%B）. And heated electrospray ionization（HESI） was used with positive and negative ion modes， the scanning range was m/z 100-1 500. The prototypical constituents and their metabolites absorbed into blood and cerebrospinal fluid of SCF were identified according to the retention time， characteristic fragments， molecular formulae and the information of reference substances. ResultA total of 42 chemical components were identified in the extract of SCF， including lignans， flavonoids， amino acids， tannins， and others， of which lignans were the main ones. A total of 27 prototypical components and 14 metabolites were identified in plasma samples from different sites. A total of 15 prototypical components and 9 metabolites were identified in cerebrospinal fluid. The main metabolic reactions involved in the formation of metabolites were mainly demethylation， methylation， demethoxylation and hydroxylation. ConclusionThrough the systematic identification of the prototypical components and metabolites of SCF in rats， it provides data support for further better exploring the material basis of SCF in the treatment of central nervous system diseases.

In vivo Pharmacokinetic Analysis of Shenbai Nanosuspension in Rats Based on Overall Composition of Chinese Materia Medica / 中国实验方剂学杂志

ObjectiveTo clarify the scientific validity of in vivo pharmacokinetic determination of the whole drug composition in Shenbai nanosuspension in rats， and to provide methodological guidance and theoretical basis for the in vivo study of multi-component complex system of traditional Chinese medicine（TCM） preparations. MethodThe concentration of the overall components， mainly total saponins and total polysaccharides in Shenbai decoction and Shenbai nanosuspension， was determined in rat plasma at different times by area under the absorbance-wavelength curve method（AUAWC）， and the concentration of individual ginsenoside Rg1 was determined by high performance liquid chromatography（HPLC）， and the methodology was verified. The pharmacokinetic parameters of the whole component were compared with those of ginsenoside Rg1 to evaluate the in vivo operational characteristics of the two preparations. ResultThe methodological investigations of AUAWC and HPLC were in accordance with the requirements. AUAWC analysis showed that the overall components in both the decoction group and the nanosuspension group showed a one-compartment model， with half-life（t1/2） of 2.43 h and 2.04 h， respectively. The relative bioavailability of Shenbai nanosuspension was 138.99%. HPLC assay showed that ginsenoside Rg1 in the decoction group and the nanosuspension group showed a two-compartment model， with distribution half-life（t1/2α） of 0.13 h and 2.55 h， and elimination half-life（t1/2β） were 14.28 h and 3.85 h， respectively. The relative bioavailability of Shenbai nanosuspension was 127.49%. Compared with Shenbai decoction， the time to peak（tmax）， peak concentration（Cmax） and area under the drug-time curve（AUC） of the overall components and ginsenoside Rg1 in Shenbai nanosuspension were increased. ConclusionThe established AUAWC can be used for the pharmacokinetic study of the overall components of TCM preparations， which is complementary to the results of individual components measured by HPLC， and can provide useful reference for the in vivo study of new dosage forms of TCM.