Influences of strength training on athletes' skills in table tennis / Influências do treinamento de força nas habilidades dos atletas em tênis de mesa / Influencias del entrenamiento de fuerza en las capacidades de los deportistas en el tenis de mesa

ABSTRACT Introduction The progressive advance of table tennis athletes' competitive level demands restructuring the traditional strength training program to readjust itself to the current athletic abilities. Objective Explore a strategy based on strength training to improve table tennis athletes' physical capacity and hitting ability. Methods Thirty table tennis students from a physical education college were selected as research volunteers. A strength training protocol was added to the traditional protocol in the experimental group. The duration of the exercises in the experimental group and the control group was the same, with a frequency of 3 times a week, totaling 9 weeks. Results The optimization scheme of the strength training combination proposed in this paper revealed an improved effect on table tennis players' performance of hitting skills and fitness. Its range of improvement was greater than the traditional strength training scheme of the control group. Conclusion The optimization scheme combining strength training proposed in this paper can be adjusted to the training according to the athletes' situation and benefit the athletes' training efficiency. It can also prevent repetitive injuries caused by the standard training mode in the long run, increasing the athletes' enthusiasm. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução O progressivo avanço do nível competitivo dos atletas de tênis de mesa demanda uma reestruturação do programa de treinamento de força tradicional para readequar-se as atuais habilidades atléticas. Objetivo Explorar uma estratégia com base no treinamento de força para o aprimoramento da capacidade física e habilidade de acertos dos atletas em tênis de mesa. Métodos Trinta alunos de tênis de mesa de uma faculdade de educação física de foram selecionados como voluntários da pesquisa. Adicionou-se um protocolo de treino de força ao protocolo tradicional no grupo experimental. A duração dos exercícios do grupo experimental e do grupo de controle foi a mesma, com frequência de 3 vezes semanais, totalizando 9 semanas. Resultados O esquema de otimização da combinação de treinamento de força proposto neste trabalho revelou um efeito melhor no desempenho das habilidades de acerto e da aptidão física dos jogadores de tênis de mesa. Sua faixa de aprimoramento foi maior do que o esquema tradicional de treinamento de força do grupo de controle. Conclusão O esquema de otimização combinando o treinamento de força proposto neste artigo pode ser ajustado ao treinamento de acordo com a situação dos atletas e beneficiar a eficiência no treinamento dos atletas. Também pode evitar, à longo prazo, as lesões repetitivas ocasionadas pelo modo de treinamento padrão, aumentando o entusiasmo dos esportistas. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción El progresivo avance del nivel competitivo de los deportistas de tenis de mesa exige una reestructuración del programa tradicional de entrenamiento de la fuerza para readaptarse a las capacidades atléticas actuales. Objetivo Explorar una estrategia basada en el entrenamiento de fuerza para la mejora de la capacidad física y la habilidad de golpeo de los atletas de tenis de mesa. Métodos Se seleccionaron treinta estudiantes de tenis de mesa de una escuela de educación física como voluntarios para la investigación. Se añadió un protocolo de entrenamiento de fuerza al protocolo tradicional en el grupo experimental. La duración de los ejercicios en el grupo experimental y en el grupo de control fue la misma, con una frecuencia de 3 veces por semana, en total 9 semanas. Resultados El esquema de optimización de la combinación de entrenamiento de fuerza propuesto en este trabajo reveló un mejor efecto sobre el rendimiento de las habilidades de golpeo y la condición física de los jugadores de tenis de mesa. Su rango de mejora fue superior al esquema de entrenamiento de fuerza tradicional del grupo de control. Conclusión El esquema de optimización que combina el entrenamiento de fuerza propuesto en este trabajo puede ajustarse al entrenamiento según la situación de los atletas y beneficiar la eficiencia del entrenamiento de los mismos. También puede evitar, a largo plazo, las lesiones repetitivas causadas por el modo de entrenamiento estándar, aumentando el entusiasmo de los atletas. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Security analysis of sports competition under the influence of covid-19 / Análise de segurança da competição esportiva sob a influência da covid-19 / Análisis de seguridad de la competición deportiva bajo la influencia del covid-19

ABSTRACT Introduction The continuous growth of COVID-19 has harmed sports competitions. Although the existing method of non-opening to spectators is very effective for preventing and controlling COVID-19, it will also seriously blow the sports economy's development. Objective Explore the safety of sports competition under the influence of COVID-19 to realize sports practice in a safe and regulated condition. Methods Firstly, the current public's willingness to participate in the competition was analyzed by questionnaire survey. Then, using the literature search method, this paper discusses the safety needs of sports competitions under the normalization of the prevention and control of COVID-19 in the research area at the present stage. Results By completely controlling the crowd shift rule and skillfully controlling the crowd pace, the transmission risk in the competition process can be effectively reduced. Conclusion The relevant departments and stadium managers should fully analyze the current epidemic prevention and control needs and strengthen spectator safety management in the study area in combination with regional characteristics and the actual spectator situation. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução O crescimento contínuo da COVID-19 tem tido um impacto negativo sobre as competições esportivas. Embora o método existente de não-abertura aos espectadores seja muito eficaz para a prevenção e controle da COVID-19, ele também trará um sério golpe ao desenvolvimento da economia esportiva. Objetivo Explorar a segurança da competição esportiva sob a influência da COVID-19, de forma a realizar a prática esportiva em uma condição segura e regulamentada. Métodos Primeiramente, a disposição do público atual para participar da competição foi analisada por meio de pesquisa por questionário. Em seguida, utilizando o método de pesquisa bibliográfica, este trabalho discute as necessidades de segurança das competições esportivas sob a normalização da prevenção e controle da COVID-19 na área de pesquisa na presente fase. Resultados Controlando completamente a regra do deslocamento da multidão e controlando habilmente o ritmo da multidão, o risco de transmissão no processo de competição pode ser efetivamente reduzido. Conclusão Os departamentos e gerentes de estádios pertinentes devem analisar plenamente as necessidades atuais de prevenção e controle de epidemias e fortalecer a gestão da segurança dos espectadores na área de estudo em combinação com as características regionais e a situação real dos espectadores. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción El continuo crecimiento del COVID-19 ha tenido un impacto negativo en las competiciones deportivas. Aunque el método actual de no abrir para los espectadores es muy eficaz para la prevención y el control del COVID-19, también supondrá un duro golpe para el desarrollo de la economía deportiva. Objetivo Explorar la seguridad de la competición deportiva bajo la influencia del COVID-19, para llevar a cabo la práctica deportiva en condiciones seguras y reguladas. Métodos En primer lugar, se analizó la disposición del público actual a participar en el concurso mediante una encuesta por cuestionario. A continuación, utilizando el método de búsqueda bibliográfica, este trabajo analiza las necesidades de seguridad de las competiciones deportivas en el marco de la normalización de la prevención y el control del COVID-19 en el ámbito de la investigación en la etapa actual. Resultados Si se controla completamente la regla de desplazamiento de la multitud y se controla hábilmente el ritmo de la multitud, se puede reducir eficazmente el riesgo de transmisión en el proceso de competición. Conclusión Los departamentos competentes y los gestores de los estadios deben analizar a fondo las necesidades actuales de prevención y control de epidemias y reforzar la gestión de la seguridad de los espectadores en la zona de estudio en combinación con las características regionales y la situación real de los espectadores. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Resistance training in soccer based on teamwork and the differences between chinese and western sports culture / Treinamento de força no futebol baseado no trabalho em equipe e nas diferenças entre a cultura esportiva chinesa e ocidental / Entrenamiento de fuerza en el fútbol basado en el trabajo en equipo y en las diferencias entre la cultura deportiva china y la occidental

ABSTRACT Introduction Soccer is a comprehensive sport that integrates collective, tactical, emotional, and rational skills, depending not only on individual skills and tactics but also on a sense of diligently shared struggle, the ability for unity and cooperation, and the spirit of sharing achievements and defeats. Objective Study the differences between Chinese and Western sports culture, exploring the soccer training method based on teamwork. Methods The height, weight, experience, and age of 6 soccer players were drawn and categorized before the experiment, and a battery of physical tests was performed before the experiment. The athletes were subjected to functional strength training for six weeks. After the training was completed, the data was re-measured and cataloged for analysis. Results Functional strength training can effectively improve athletes' physical quality and baseline performance to improve their competitive performance. Conclusion Currently, functional strength training plays a good role in promoting college soccer teams. Therefore, coaches should provide functional strength training for college soccer teams. Level of evidence II; Therapeutic studies - investigating treatment outcomes.

RESUMO Introdução O futebol é um esporte abrangente que integra habilidades coletivas, táticas, emocionais e racionais, dependendo não apenas de habilidades e táticas individuais, mas também um senso de luta diligentemente compartilhada, a capacidade de unidade e cooperação, e o espírito de dividir conquistas e derrotas. Objetivo Estudar as diferenças entre a cultura esportiva chinesa e a ocidental, explorando o método de treinamento do futebol baseado no trabalho em equipe. Métodos A altura, peso, tempo de experiência e idade de 6 jogadores de futebol foram sorteados e categorizados antes do experimento, uma bateria de testes físicos foi efetuada antes do experimento. Os atletas foram sujeitados à treinamento de força funcional por 6 semanas. Após a conclusão do treinamento, os dados foram aferidos novamente e catalogados para análise. Resultados O treinamento funcional de força pode efetivamente melhorar a qualidade física e o desempenho basal dos atletas, de modo a melhorar seu desempenho competitivo. Conclusão Atualmente, o treinamento de força funcional desempenha um bom papel na promoção das equipes de futebol universitário, portanto, os treinadores devem fornecer o exercício físico funcional para as equipes de futebol universitário. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción El fútbol es un deporte integral que integra habilidades colectivas, tácticas, emocionales y racionales, y que depende no sólo de las habilidades y tácticas individuales, sino también del sentido de la lucha diligentemente compartida, de la capacidad de unidad y cooperación, y del espíritu de compartir los logros y las derrotas. Objetivo Estudiar las diferencias entre la cultura deportiva china y la occidental, explorando el método de entrenamiento de fútbol basado en el trabajo en equipo. Métodos Se extrajeron y clasificaron la altura, el peso, la antigüedad y la edad de 6 jugadores de fútbol antes del experimento, y se realizó una batería de pruebas físicas antes del experimento. Los atletas fueron sometidos a un entrenamiento de fuerza funcional durante 6 semanas. Una vez finalizado el entrenamiento, se volvieron a medir los datos y se catalogaron para su análisis. Resultados El entrenamiento de la fuerza funcional puede mejorar eficazmente la calidad física y el rendimiento de base de los deportistas para mejorar su rendimiento competitivo. Conclusión En la actualidad, el entrenamiento de fuerza funcional desempeña un buen papel en la promoción de los equipos de fútbol universitario, por lo tanto, los entrenadores deberían proporcionar ejercicios de fuerza funcional a los equipos de fútbol universitario. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Banxia Xiexintang Regulates Autophagy of Interstitial Cells of Cajal in Gastric Antrum of Rats with Gastric Electric Dysrhythmia / 中国实验方剂学杂志

ObjectiveTo observe the effect of Banxia Xiexintang on the autophagy of interstitial cells of Cajal （ICCs） in the gastric antrum of rats with gastric electric dysrhythmia， and explore the protective effect and regulatory mechanism. MethodThirty-two SD rats were randomly assigned into a normal group， a model group， a Banxia Xiexintang （24.68 g·kg-1） group， and a positive drug （2.7 mg·kg-1） group. The rat model of gastric electric dysrhythmia was established by the method of dieting every other day and drinking dilute hydrochloric acid， and Banxia Xiexintang and the positive drug were administrated for intervention. The body weight of each rat was recorded weekly. The gastric electric activity was recorded by the biological function experimental system. The ultrastructural changes of the gastric antrum tissue were observed by a transmission electron microscope. The co-expression of receptor tyrosine kinase （c-kit）/mammalian homolog of yeast Atg6 （Beclin1） in the gastric antrum tissue was detected by double immunofluorescence labeling method. The expression of microtubule-associated protein 1 light chain 3B （LC3B） and p62 protein in the gastric antrum tissue was determined by Western blot， and the LC3BⅡ/Ⅰ ratio was calculated. ResultCompared with the normal group， the modeling reduced the body weight （P<0.01） and decreased the dominant frequency and dominant power of gastric electricity （P<0.01）. In addition， the modeling caused ultrastructural damage of ICCs in gastric antrum， degeneration and necrosis of organelles， and appearance of a small number of autophagic vesicles. The results of double immunofluorescence labeling showed that the modeling inhibited the positive expression of c-kit and promoted the positive expression of Beclin1 in gastric antrum tissue. Western blot results showed that the modeling increased the ratio of LC3BⅡ/Ⅰ （P<0.01） and down-regulated the expression of p62 protein （P<0.01） in the gastric antrum tissue. Compared with the model group， Banxia Xiexintang and the positive drug increased the body weight （P<0.01） and the dominant frequency and dominant power of gastric electricity （P<0.01）， repaired the ultrastructural damage of ICCs in gastric antrum tissue， promoted the positive expression of c-kit and inhibited the positive expression of Beclin1 in the gastric antrum tissue. Furthermore， Banxia Xiexintang up-regulated the expression of p62 （P<0.05） and inhibited the transformation of LC3BⅠ into LC3BⅡ in gastric antrum tissue （P<0.05）. ConclusionBy regulating the expression of autophagy-related proteins， Banxia Xiexintang can reduce the autophagy and regulate the number and structure of ICCs and thus improve the gastric electric rhythm of rats， which preliminarily explains the mechanism of Banxia Xiexintang in the treatment of epigastric stuffiness.

Epidemiological characteristics of allergic rhinitis and its correlation with serum IFN-γ and IL-4 levels / 公共卫生与预防医学

Objective To analyze the epidemiological characteristics of AR and its correlation with serum IFN-γ and IL-4 levels in Bazhong City, and to provide theoretical basis for clinical prevention and treatment of AR. Methods Adopt the method of multistage stratified random survey from January 2019 to January 2020 bazhong 3 armour hospital otolaryngology seeing a doctor , with face to face questionnaire survey form the people generally, AR number of statistics, the main clinical symptoms and related symptoms, AR merger disease situation, according to the illness severity was divided into mild and moderately severe group, Five mL of elbow venous blood was extracted from AR patients, and 22 kinds of allergens were determined by using the allergen-specific IgE antibody detection kit (western blot). Serum IFN-γ and IL-4 levels were determined by enzyme-linked immunosorbent assay. Pearson correlation analysis was performed on serum IFN-γ and IL-4 levels and severity of allergic rhinitis. Results Among 1 243 patients who completed the questionnaire, the prevalence of AR was 275 (22.12%). There was significant difference in the prevalence of AR among different age groups (χ2=6.809 , P2=7.914 , P<0.0) and the prevalence of AR in workers was the highest (26.48%). Among 275 AR patients in Bazhong City, 153 cases (55.64%) had seasonal allergic rhinitis and 122 cases (44.36%) had perennial allergic rhinitis. The main clinical symptoms of AR patients were sneezing in 234 cases (85.09%) and nasal obstruction in 197 cases (71.64%). AR combined with bronchial asthma in 59 cases (21.45%), conjunctivitis in 28 cases (10.18%); the peak of AR incidence was mainly in July. Among 22 allergens, dust mite was the most common allergen in 139 cases (50.55%), followed by penicillin in 56 cases (20.36%). The main inducing factors were pollen 112 cases (40.73%) and cold 98 cases (35.64%). According to the severity of the disease, they were divided into mild group (n=178) and moderate to severe group (n=97). The serum IL-4 level in moderate and severe groups was significantly higher than that in mild group (P<0.05). The serum IFN-γ level in moderate and severe groups was significantly lower than that in mild group (P<0.05). Pearson correlation analysis showed that il-4 level was positively correlated with disease severity (r=0.492, P<0.05). IFN-γ was negatively correlated with the severity of the disease (r=-0.459, P<0.05). Conclusion The prevalence of AR is high in Bazhong city, and the main clinical symptom is sneezing. Among the complications, bronchial asthma is the most common. Colds and weather changes are the main factors causing AR.

The fat attenuation index around coronary artery measurement on coronary calcium score images and coronary CT angiography images: a comparison study / 中华放射学杂志

Objective:To investigate the difference in the peri-coronary fat attenuation index (FAI) between using coronary calcium score (CCS) images and coronary CT angiography (CCTA) images, and to explore the feasibility and befitting threshold of FAI measured on CCS images.Methods:The clinical and imaging data of patients who underwent CCTA examination from August 2019 to August 2020 were retrospectively analyzed in the First Affiliated Hospital of Soochow University. According to the inclusion and exclusion criteria, there were 122 cases in non-calcified plaque group (144 coronary arteries) and 97 cases in none-plaque group (186 coronary arteries). The coronary arteries were delineated both on CCS and CCTA images with Perivascular Fat Analysis Tool; the regions of interest of peri-coronary adipose tissue were generated automatically after setting the threshold of fat tissue. Then the FAI value was calculated. The thresholds were set in four levels (-190--30, -185--25, -180--20 and -175--15 HU) for CCS images and one level (-190--30 HU) for CCTA images. The intra-class correlation coefficient (ICC) was used to evaluate the consistency of the measurements of FAI values on CCS and CCTA images between the two physicians. Paired t test was used to compare the differences of FAI values between CCS and CCTA images, and Pearson correlation coefficient was used to evaluate the correlation between CCS-FAI and CCTA-FAI. Results:(1) FAI values measured on CCS and CCTA images by 2 physicians showed good consistency; (2) At the threshold of -185--25 HU, there was no significant difference in FAI values between the CCS and CCTA images for non-calcified plaque group [(-84.15±5.99)HU vs. (-83.83±5.98)HU, t=0.79, P=0.429], as well as for the none-plaque group [(-83.41±5.75)HU vs.(-83.84±6.25)HU, t=-1.08, P=0.280]; (3) There were significant differences on FAI values between the CCS images and CCTA images at the threshold of -190--30、-180--20 and -175--15 HU (all P<0.05); (4) There were moderate correlations on FAI values between the CCS images and CCTA images under different thresholds both in non-calcified plaque group and none-plaque group. Conclusion:It is feasible to measure FAI on CCS images, and the befitting threshold is -185--25 HU.

The renal metabolic mechanism of salt sensitive hypertension in Dahl-SS rats / 生理学报

The kidney is one of the main target organs involved in hypertension, and it regulates water and salt metabolism, blood volume and vascular resistance. High salt intake induces salt and water retention, persistent endothelial dysfunction and elevation of blood pressure in salt sensitive individuals. Dahl salt sensitive (Dahl-SS) rats, as a classic animal model for salt sensitive hypertension, have many similar stably inherited physiological characteristics to human with salt sensitive hypertension, such as salt sensitivity, hyperlipidemia, insulin resistance, renal failure, increased urinary protein secretion and low plasma renin activity. Based on renal physiology and biochemistry researches and multi-omics analyses in Dahl-SS rats, this review will summarize the relationship between salt sensitive hypertension and renal redox, NO, amino acids, glucose and lipid metabolism.

Effect of artesunate on intestinal ischemia/reperfusion-induced lung injury in mice and relationship with heme oxygenase-1 / 中华麻醉学杂志

Objective:To evaluate the effect of artesunate on intestinal ischemia/reperfusion (I/R)-induced lung injury in mice and relationship with heme oxygenase-1 (HO-1).Methods:Twenty-four healthy SPF male C57BL/6 mice, aged 8-9 weeks, weighing 18-22 g, were divided into 4 groups ( n=6 each) using a random number table method: sham operation group (group Sham), intestinal I/R group (group I/R), artesunate group (group A), and artesunate plus HO-1 inhibitor Zinc protoporphyrin Ⅸ(ZnPP) group (group AS). The model of intestinal I/R injury was established by occluding the superior mesenteric artery for 45 min followed by 2 h reperfusion in anesthetized animals.Artesunate 40 mg/kg was injected via the tail vein at 1 h before ischemia in group A. ZnPP 7.5 mg/kg was injected via the tail vein at 12 h before ischemia, and artesunate 40 mg/kg was injected via the tail vein at 1 h before ischemia in group AS.The animals were sacrificed at the end of reperfusion, and the lung tissues were obtained for microscopic examination of the pathologic changes and for determination of the wet/dry lung weight (W/D) ratio, myeloperoxidase (MPO) activity, malondialdehyde (MDA) content, expression of interleukin-6 (IL-6) mRNA (by fluorescence quantitative polymerase chain reaction) and apoptotic index (AI) (by TUNEL). The lung injury score was assessed. Results:Compared with group Sham, the lung injury score, W/D ratio, MPO activity, MDA content and AI were significantly increased, and the expression of IL-6 mRNA was up-regulated in group I/R ( P<0.05). Compared with group I/R, the lung injury score, W/D ratio, MPO activity, MDA content and AI were significantly decreased, and the expression of IL-6 mRNA was down-regulated in group A ( P<0.05). Compared with group A, the lung injury score, W/D ratio, MPO activity, MDA content and AI were significantly increased, and the expression of IL-6 mRNA was up-regulated in group AS ( P<0.05). Conclusions:Artesunate can alleviate intestinal I/R-induced lung injury, and the mechanism may be related to activation of HO-1 in mice.

Modelling the difference of circulating lymphocytes between conventional fractionation radiotherapy and stereotactic body radiation therapy for lung cancer based on convolution operation / 中华放射肿瘤学杂志

Objective:To evaluate the difference between conventional fractionation radiotherapy (CRT) and stereotactic body radiation therapy (SBRT) in lung cancer.Methods:A model was constructed based on convolution operation and finite element method, simulating the dose delivered to circulating lymphocytes (CL) in radiotherapy. The model was trained on a training group ( n=3) and validated in an independent validation group between SBRT ( n=10) and CRT ( n=10). The peak cumulative dose of circulating lymphocyte (PCDC) was compared between the two schemes, and the effect of different PTV volumes and treatment time on the cumulative dose was also analyzed. The correlation between PCDC and CL change value was discussed. Results:In the training group, PCDC with CRT to CL were 1.26 Gy,1.79 Gy, 2.54 Gy in PTV of 38 cm 3, 63 cm 3 and 114 cm 3, and PCDC with SBRT to CL were 0.84 Gy, 1.22 Gy, 1.55 Gy in PTV of 38 cm 3, 63 cm 3, 114 cm 3, respectively. PCDC gap of SBRT to CL was decreased by 0.42 Gy, 0.57 Gy, 0.99 Gy, respectively. In the validation group, the lymphocyte change value in SBRT and CRT were (1.10±0.64)×10 9/L and (0.42±0.48)×10 9/L, and there was significant difference ( P=0.015). PCDC in SBRT and CRT were 3.56 (2.79, 3.82) Gy and 1.24 (0.697, 1.73) Gy, and there was significant difference ( P<0.001). There was a positive correlation between lymphocyte change value and PCDC ( r=0.455, P<0.05). Conclusions:SBRT, compared to CRT, will lead to lower PCDC and CL lymphocyte change value, which may cause a greater impact on the difference of PCDC along with the enlargement of PTV. CRT and large PTV volume may cause more significant effect upon the body immune function.

A multicenter, double-blind, randomized controlled clinical trial comparing ergometrine with oxytocin and oxytocin alone for prevention of postpartum hemorrhage at cesarean section / 中华妇产科杂志

Objective:To compare oxytocin combined with ergometrine with oxytocin alone in terms of primary prophylaxis for postpartum hemorrhage (PPH) at the time of cesarean section (CS).Methods:This was a multicenter double-blind randomized controlled interventional study comparing ergometrine combined with oxytocin and oxytocin alone administered at CS. From December 2018 to November 2019, a total of 298 parturients were enrolled in 16 hospitals nationwide. They were randomly divided into experimental group (ergometrine intra-myometrial injection following oxytocin intravenously; 148 cases) and control group (oxytocin intra-myometrial injection following oxytocin intravenously; 150 cases) according to 1∶1 random allocation. The following indexes were compared between the two groups: (1) main index: blood loss 2 hours (h) after delivery; (2) secondary indicators: postpartum blood loss at 6 h and 24 h, placental retention time, incidence of PPH, the proportion of additional use of uterine contraction drugs, hemostatic drugs or other hemostatic measures at 2 h and 24 h after delivery, the proportion requiring blood transfusion, and the proportion of prolonged hospital stay due to poor uterine involution; (3) safety indicators: nausea, vomiting, dizziness and other adverse reactions, and blood pressure at each time point of administration.Results:(1) The blood loss at 2 h after delivery in the experimental group [(402±18) ml] was less than that in the control group [(505±18) ml], and the difference was statistically significant ( P<0.05). (2) The blood loss at 6 h and 24 h after delivery in the experimental group were less than those in the control group, and the differences were statistically significant (all P<0.05). There were no significant differences between the two groups in the incidence of PPH, the proportion of additional use of uterine contraction drugs, hemostatic drugs or other hemostatic measures at 2 h and 24 h after delivery, the proportion requiring blood transfusion, and the proportion of prolonged hospital stay due to poor uterine involution (all P>0.05). (3) Adverse reactions occurred in 2 cases (1.4%, 2/148) in the experimental group and 1 case (0.7%, 1/150) in the control group. There was no significant difference between the two groups ( P>0.05). The systolic blood pressure within 2.0 h and diastolic blood pressure within 1.5 h of drug administration in the experimental group were higher than those in the control group, and the differences were statistically significant ( P<0.05), but the blood pressure of the two groups were in the normal range. Conclusion:The use of ergometrine injection in CS could reduce the amount of PPH, which is safe and feasible.

Research progress in application of ultrafast cardiac shear wave imaging in pediatric cardiovascular diseases / 中国医师杂志

Echocardiography is the primary method for noninvasive evaluation of cardiovascular system in children. However, conventional echocardiography cannot observe and analyze transient cardiac events and transient phases due to its low temporal resolution, nor can it evaluate the mechanical properties of myocardium. In recent years, ultrasonic imaging technology, and the improvement of computing capacity greatly promoted the development of the ultrafast cardiac shear wave imaging, allowing the speed of 5 000 frames/s via chest cardiac imaging, has fast dynamic movement of heart tissue, real-time observation for myocardial properties, function and blood flow to the heart pattern advantages, can better diagnose cardiovascular disease in children. In this paper, the principle of ultrafast cardiac shear wave imaging and its recent application in pediatric cardiac imaging are reviewed.

Clinical characteristics and risk factors of lower extremity arterial disease in patients with diabetic foot ulcer / 南方医科大学学报

OBJECTIVE@#To investigate the clinical characteristics of lower extremity arterial disease (LEAD) and its risk factors in patients with diabetic foot ulcer (DFU).@*METHODS@#We retrospectively collected the clinical and follow-up data of 650 patients with DFU treated in the Department of Endocrinology and Metabolism of Nanfang Hospital between January, 2017 and December, 2019. We compared the data between patients who had LEAD and those without LEAD and used a multivariate logistic regression model to analyze the risk factors of LEAD in DFU patients.@*RESULTS@#Among the 650 DFU patients, 470 (72.4%) had LEAD. The patients were followed up for a mean of 3.5 months, and the mean healing time of DFU was 2.55 months; healing of DFU occurred in 453 patients and 183 patients received amputation. The patients with LEAD and those without LEAD differed significantly in age, hospitalization costs, diastolic blood pressure (DBP), glycated hemoglobin, blood lipid levels, disease course, ankle brachial index, healing time, smoking history, clinical outcomes, Wagner grade and imaging results (P < 0.05). Multivariate logistic regression analysis identified age (OR=1.070, 95% CI: 1.049-1.091), smoking history (OR= 2.013, 95% CI: 1.268-3.195), and a decreased DBP (OR=0.980, 95% CI: 0.963-0.997) as independent risk factors for LEAD in DFU patients. A prolonged healing time was a prominent clinical feature of DFU complicated by LEAD.@*CONCLUSION@#DFU patients have a high incidence of LEAD, which leads to high rates of disability and mortality and is associated with an advanced age, high smoking rate and longer healing time. A decreased DBP is also a risk factor for LEAD in DFU patients.

Clinical characteristics and comprehensive treatment of patients with cleidocranial dysplasia / 中华口腔医学杂志

Objective: To summarize the clinical characteristics of patients with cleidocranial dysplasia (CCD) and analyze their treatment methods. Methods: From January 2000 to December 2020, patients with CCD who completed comprehensive treatment in the Department of Orthodontics and the First Dental Clinic, School and Hospital of Stomatology, China Medical University were retrospectively analyzed. A total of 14 CCD patients [7 males and 7 females, aged (16.1±4.5) years] were collected. There were 153 impacted permanent teeth in this study. In addition to the teeth that needed to be extracted due to special conditions, 147 impacted teeth were pulled into the dentition using closed traction. Patients were divided into adolescent group (≥12 years and<18 years, 10 patients) and adult group (≥18 years, 4 patients). Failure rate of traction was compared between the two groups. Factors affecting the success rate of closed traction such as vertical position of teeth (high, middle and low) and horizontal position of the teeth (palatal, median and buccal) were analyzed. Results: The incidence of maxillary impacted teeth [69.3% (97/140)] was higher than that of mandibular impacted teeth [40% (56/140)]. The difference was statistically significant (χ2=24.22, P<0.001). The supernumerary teeth were mainly located in the premolar area 61.4% (21/44), and most of them were in the palatal region of the permanent teeth 95.5% (42/44). They were generally located at the same height or the occlusal side of the corresponding permanent teeth. The success rate of closed traction was 93.9% (138/147). The success rate in the adolescent group [98.2% (108/110)] was higher than that in the adult group [81.1% (30/37)], and the difference was significant (χ2=14.09, P<0.05). Failure after closed traction of 9 teeth was found totally, including 7 second premolars. The success rate of traction in impacted second premolars at different vertical (χ2=11.44, P<0.05) and horizontal (χ2=9.71, P<0.05) positions in alveolar bone was different significantlly. The success rates of the second premolars were high (15/16), middle (12/13), low (2/7), and lingual palatine (10/17), median (19/19), lip-buccal (0/0), respectively. Conclusions: The closed traction of impacted teeth in patients with CCD was effective, and the age was the main variable affecting the outcome. The success rate of traction in impacted second premolars located in low position vertically or in palatal position was low, which required close observation during treatment.

An investigation on serum antibody level of varicella-zoster virus in healthy population in Beijing / 中华预防医学杂志

Objective: To assess the level and trend of varicella-zoster virus (VZV) antibody among healthy population in Beijing in 2017, after the five-year implementation of the two doses varicella vaccination strategy in 2012, and to provide evidence for scientific evaluation of immunization strategy. Methods: A total of 2 144 subjects in ten age groups from 8 districts of Beijing city were recruited in this study using cross-sectional survey based on multi-stage cluster random sampling method. Serum samples were collected and VZV antibody was detected by ELISA. The influencing factors of antibody concentration and positive rate were analyzed and compared with the study in 2012. The antibody concentration and antibody positive rate were analyzed by nonparametric test and χ² test respectively. Results: The ratio of subjects with registered residence in Beijing city to other provinces was 1∶1. The ratio of male to female was 1∶1.08. The median concentration of VZV antibody was 341.4 (78.6, 1 497.8) mIU/ml, and the total antibody positive rate was 71.1% (1 524/2 144). There were significant differences in antibody positive rate (χ²=736.39, P<0.01) and antibody concentration (χ²=740.34, P<0.01) among different age groups. The antibody positive rate generally increased with age (χ²trend=7.32, Ptrend<0.01). Among 862 children under 14 years old, the antibody positive rate of two doses vaccination 72.8% (182/250) was significantly higher than that of one dose vaccination 51.9% (154/297) (χ²=25.14, P<0.01). There was significant difference between 1-4 years old group (χ²=11.71, P<0.01) and 10-14 years old group (χ²=5.95, P=0.02), but not in 5-9 years old group (χ²=3.00, P=0.07). Compared with the study in 2012, the antibody positive rate increased in 5-9 years old group (χ²=14.35, P<0.01) and decreased in 1-4 years old group (χ²=11.51, P=0.01) in 2017. Conclusion: The recommended varicella booster vaccination has significantly improved the VZV antibody level of children in Beijing city. In the future, it is necessary to explore a more optimized two doses varicella vaccination schedule for children in combination with epidemiological evidence.

A real world study on the relationship between drug resistance of targeted therapy and prognosis of HER-2-positive advanced breast cancer / 中华肿瘤杂志

Objective: To explore the effect of primary and acquired resistance to anti-human epidermal growth factor receptor 2 (HER-2) on the overall survival of patients with HER-2 positive advanced breast cancer. Methods: The clinical characteristics of HER-2 positive patients with advanced breast cancer admitted to Cancer Hospital of Chinese Academy of Medical Sciences from January 1998 to December 2018 were collected, and their neoadjuvant/adjuvant and advanced three-line chemotherapy were summarized. Among them, targeted drugs for HER-2 included trastuzumab, pertuzumab, T-DM1, RC48-ADC, lapatinib, pyrotinib, allitinib, sipatinib, seratinib. Based on the duration of benefit from anti HER-2 treatment, the patients were divided into two groups: primary anti HER-2 resistance group and acquired anti HER-2 resistance group. In this study, the overall survival (OS) was used as the main end point. Kaplan-Meier analysis and Cox proportional risk regression model were used to analyze the effects of different drug resistance mechanisms on the overall survival. Results: The whole group of 284 patients were included. The median age of recurrence and metastasis was 48 years old, 155 (54.6%) were hormone receptor (HR) positive and 129 (45.4%) were HR negative, 128 cases (45.1%) were premenopausal and 156 cases (54.9%) were postmenopausal, 277 cases (97.5%) had a score of 0-1 in ECoG PS and 7 cases (2.5%) had a score of more than 2 in the first diagnosis of relapse and metastasis. There were 103 cases (36.3%) in the primary drug resistance group and 181 cases (63.7%) in the secondary drug resistance group. The median overall survival time of the two groups was 24.9 months and 40.4 months, respectively, with statistical significance (P<0.001). Conclusion: Primary resistance to HER-2 is one of the factors of poor prognosis in HER-2 positive breast cancer, and its mechanism needs to be further explored.

Therapeutic value of modified multipoint drainage for biliary complications after liver transplantation / 中华消化内镜杂志

Objective:To investigate the therapeutic value of modified multipoint drainage for biliary complications after liver transplantation.Methods:A total of 125 patients treated by endoscopic retrograde cholangiopancreatography (ERCP) for biliary complications after liver transplantation in Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine from May 2018 to May 2020 were enrolled. Patients were divided into endoscopic retrograde biliary drainage (ERBD) group ( n=67, treated with multiple drainage of bile duct stent) and modified multipoint drainage group [ n=58, treated with ERBD combined with endoscopic nasobiliary drainage (ENBD)] by random number table. Modified multipoint drainage group were further randomly divided into two groups, modification group 1, 31 cases, where nasobiliary ducts were cut proximal to duodenal papilla after one week under endoscopy and modification group 2, 27 cases, where they were cut proximal to duodenal papilla after two weeks under endoscopy. The changes of serological indexes in 2 weeks after the operation in three groups were compared, and the incidence of short-term and long-term complications were analyzed. Results:The serological indexes were improved in patients at 1 d, 7 d and 14 d after ERCP, especially in modified multipoint drainage groups. Two weeks after the operation, the improvement of serological indexes in modification group 2 was better than that in modification group 1. Incidence of recent complications including cholangitis, hyperamylasinemia, and pancreatitis in the ERBD group were higher than those in modification group 1 [32.84% (22/67) VS 12.90% (4/31), 46.27% (31/67) VS 19.35% (6/31), 20.90% (14/67) VS 3.23% (1/31), all P<0.05] and modification group 2 [32.84% (22/67) VS 11.11% (3/27), 46.27% (31/67) VS 22.22% (6/27), 20.90% (14/67) VS 3.70% (1/27), all P<0.05]. ERBD group had a higher incidence of long-term complications including recurrent biliary infection and jaundice than modification group 1 [ 58.21% (39/67) VS 35.48% (11/31), P=0.036; 49.25% (33/67) VS 25.81% (8/31), P=0.027] and modification group 2 [58.21% (39/67) VS 11.11% (3/27), P<0.001; 49.25% (33/67) VS 25.93% (7/27), P=0.038]. The incidence of recurrent biliary infection in modification group 1 was higher than that in modification group 2 [35.48% (11/31) VS 11.11% (3/27), P=0.030]. Conclusion:Multiple drainage with indwelling nasal bile duct by ERCP can effectively reduce the short-term and long-term complications and improve the recovery of serological indexes for patients with biliary complications after liver transplantation. It is suggested that the nasobiliary duct should be retained for 2 weeks and then transformed into a built-in tube to continue drainage.

Effective fraction from Simiao Wan prevents hepatic insulin resistant by inhibition of lipolysis via AMPK activation / 中国天然药物

Simiao Wan (SMW) is a traditional Chinese formula, including Atractylodis Rhizoma, Achyranthis Bidentatae Radix, Phellodendri Chinensis Cortex and Coicis Semen at the ratio of 1:1:2:2. It can be used to the treatment of diabetes. However, its bioactive compounds and underlying mechanism are unclear. This study aimed to screen the antilipolytic fraction from SMW and investigate its therapeutic mechanisms on hepatic insulin resistance. Different fractions of SMW were prepared by membrane separation combined with macroporous resin and their antilipolytic activities were screened in fasted mice. The effects of 60% ethanol elution (ESMW) on lipolysis were investigated in 3T3-L1 adipocytes stimulated by palmitic acid (PA) and high fat diet (HFD)-fed mice. In our study, ESMW is the bioactive fraction responsible for the antilipolytic activity of SMW and 13 compounds were characterized from ESMW by UHPLC-QTOF-MS/MS. ESMW suppressed protein kinase A (PKA)-hormone-sensitive lipase (HSL) related lipolysis and increased AMP-activated protein kinase (AMPK) phosphorylation in PA challenged 3T3-L1 adipocytes. AMPKα knockdown abolished the inhibitory effects of ESMW on IL-6 and HSL pSer-660, revealing that the antilipolytic and anti-inflammatory activities of ESMW are AMPK dependent. Furthermore, ESMW ameliorated insulin resistance and suppressed lipolysis in HFD-fed mice. It inhibited diacylglycerol accumulation in the liver and inhibited hepatic gluconeogenesis. Conditional medium collected from ESMW-treated 3T3-L1 cells ameliorated insulin action on hepatic gluconeogenesis in liver cells, demonstrating the antilipolytic activity contributed to ESMW beneficial effects on hepatic glucose production. In conclusion, ESMW, as the antilipolytic fraction of SMW, inhibited PKA-HSL related lipolysis by activating AMPK, thus inhibiting diacylglycerol (DAG) accumulation in the liver and thereby improving insulin resistance and hepatic gluconeogenesis.

A Bibliometric Analysis and Visualization of Current Research Trends in Chinese Medicine for Osteosarcoma / 中国结合医学杂志

BACKGROUND@#To illustrate the research framework, overall knowledge structure, and development trends of Chinese medicine (CM) treatment for osteosarcoma (OS) by using a bibliometric analysis and newly developed visualization tools.@*METHODS@#Research datasets were acquired from the Web of Science (WOS) database from January 1, 1980 to September 30, 2019. VOS viewer and Citespace software was used to analyze the data and generate visualization knowledge maps. Annual trends of publications, distribution of institutes, distribution of journals, citation and H-index status, co-authorship status, research hotspots and co-citation status were analyzed.@*RESULTS@#A total of 223 publications in the WOS database met the requirement. The number of published articles showed a rise but the citation frequency and the H-index of China were relatively low. The cooperation between the countries, institutes and authors were relatively weak. Most publications were basic researches. Most of the previous researches focused on basic mechanisms of CM in treating OS, and therapy and improvement of dosage form may become a frontier in this research field.@*CONCLUSIONS@#Compared with other fields, the field of CM treatment for osteosarcome is still in infancy. The distribution of researches is imbalanced and cooperation between countries, institutions and authors remains to be strengthened. Furthermore, basic research occupies an absolute dominant position, and the exploration of the molecular mechanism of CM in preventing and treating OS may become a key point in the future.

Establishment of a rapid method for quality assessment of cardiotonic effect of Shengfupian / 药学学报

Based on the similar structure of adrenaline shared by higenamine (HI), salsolinol (SA) and coryneine (CO), a photochemical colorimetric sensor based on the displacement reaction of o-diphenol hydroxyl group and alizarin red S-phenylboric acid system was constructed to quickly distinguish and identify the cardiac strength of Shengfupian. The results show that the optimal condition of the sensor is: the molar ratio of alizarin red S (ARS) to phenylboric acid (PA) is 1∶3, reaction temperature is 0 ℃; The preparation method of the sample solution is optimized as follows: 2.5 g of Shengfupian powder was taken, 10 times the amount of methanol was added, and 300 W, 40 kHz ultrasound was carried out for 15 min; methodological studies showed that the method had good precision, repeatability and stability. The |△G| value (G is green, |△G| = |G after - G before|) of each sample was obtained by response values determination of 14 batches of Shengfupian. LC-MS/MS was used to determine the contents of three cardiac components in Shengfupian. It was found that the order of the total contents of cardiotonic components was basically consistent with |△G|. Then the correlation was analyzed, and the correlation coefficient R2 was as high as 0.87, which proved the scientificity and accuracy of this method. This study fills the methodological gap of rapid evaluation of the quality of Shengfupian, and provides the key technical support for the high quality and good price of Shengfupian in the market circulation and clinical application.

Essential oil from Saussurea costus inhibits proliferation and migration of Eca109 cells via mitochondrial apoptosis and STAT3 signaling

Objective: To investigate the effect and its underlying molecular mechanisms of essential oil from Saussurea costus in esophageal cancer cell line Eca109. Methods: The chemical composition of essential oil from Saussurea costus was investigated by gas chromatography-mass spectrometry (GC-MS). The anti-proliferative, anti-migrative, and apoptotic effects of essential oil from Saussurea costus against Eca109 cells were analyzed. Moreover, the expression of proteins associated with cell cycle, metastasis, and apoptosis was determined. Results: GC-MS analysis showed that essential oil from Saussurea costus was predominantly comprised of sesquiterpenes. Saussurea costus essential oil inhibited the viability of Eca109 cells in a dose-and time-dependent manner with IC 50 values of (24.29±1.49), (19.16±2.27) and (6.97±0.86) μg/mL at 12, 24, and 48 h, respectively. The expression levels of target proteins in the cell cycle (phase G 1 /S), including cyclin D1, p21, and p53, were affected by Saussurea costus essential oil. The essential oil also downregulated the expression of metastasis-related proteins MMP-9 and MMP-2. Moreover, it induced apoptosis of Eca109 cells through the mitochondrial pathway, as well as inhibition of STAT3 phosphorylation. Conclusions: The essential oil from Saussurea costus exhibited anti-proliferative, anti-migrative, and apoptotic effects on Eca109 cells, and could be further explored as a potential anti-esophageal cancer agent.