Influence of athletics on muscle composition and balance of students / Influência do atletismo na composição muscular e equilíbrio de estudantes / Influencia del atletismo en la composición muscular y en el equilibrio de estudiantes

ABSTRACT Introduction The physical quality of college students decreases annually, a problem that physical education teachers should consider. Athletics can exercise the body's musculature integrally and improve young college students' physical and psychological abilities. Objective Analyze the influence of athletics on the muscle composition and hemodynamic balance of students. Methods In a given university 70 volunteers were randomly selected and divided into experimental and control classes, with 35 students each. The experimental class chose a gymnastics course, while the control class performed athletic activities represented by running. Results Under continuously increasing exercise duration and intensity, the athletes gradually shifted from aerobic to anaerobic exercise, so that muscle oxygen saturation gradually decreased. The dynamic balance ability of the students in the experimental class was greatly improved compared to the control class, reaching a balanced state. Conclusion The athletic program proposed in this paper can promote the adjustment of athletes' blood oxygen saturation, increase muscle oxygen delivery capacity, and exercise endurance, and fully promote fitness progress in the students. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução A qualidade física dos estudantes universitários decresce anualmente, sendo um problema que deve ser ponderado pelos professores de educação física. O atletismo pode exercitar integralmente a musculatura corporal além de melhorar as habilidades físicas e psicológicas dos jovens universitários. Objetivo Analisar a influência do atletismo na composição muscular e no equilíbrio hemodinâmico dos estudantes. Métodos Em uma determinada universidade foram selecionados 70 voluntários aleatoriamente divididos em classe experimental e controle, com 35 alunos cada. A classe experimental elegeu um curso de ginástica, enquanto a classe de controle realizou atividades de atletismo representados pela corrida. Resultados Sob aumento contínuo da duração e intensidade do exercício, os atletas começaram a passar gradualmente do exercício aeróbico para o anaeróbico, de modo que a saturação de oxigênio muscular diminuiu gradualmente. A capacidade de equilíbrio dinâmico dos alunos da classe experimental foi muito aprimorada comparativamente a da classe de controle, atingindo um estado equilibrado. Conclusão O programa de atletismo proposto neste artigo pode promover o ajuste da saturação de oxigênio no sangue dos atletas, aumentar a capacidade de fornecimento de oxigênio muscular e a resistência ao exercício, promovendo integralmente o progresso da aptidão física nos alunos. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción La calidad física de los estudiantes universitarios disminuye anualmente, siendo un problema sobre el que deben reflexionar los profesores de educación física. El atletismo puede ejercitar integralmente la musculatura corporal además de mejorar las capacidades físicas y psicológicas de los jóvenes universitarios. Objetivo Analizar la influencia del atletismo en la composición muscular y el equilibrio hemodinámico de los estudiantes. Métodos En una determinada universidad se seleccionaron aleatoriamente 70 voluntarios y se dividieron en clase experimental y de control, con 35 estudiantes cada una. La clase experimental eligió un curso de gimnasia, mientras que la clase de control realizó actividades atléticas representadas por la carrera. Resultados Al aumentar continuamente la duración y la intensidad del ejercicio, los atletas empezaron a pasar gradualmente del ejercicio aeróbico al anaeróbico, de modo que la saturación de oxígeno del músculo disminuyó gradualmente. La capacidad de equilibrio dinámico de los alumnos de la clase experimental mejoró mucho en comparación con la clase de control, alcanzando un estado de equilibrio. Conclusión El programa de atletismo propuesto en este artículo puede promover el ajuste de la saturación de oxígeno en la sangre de los atletas, aumentar la capacidad de entrega de oxígeno de los músculos y la resistencia al ejercicio, promoviendo integralmente el progreso de la aptitud física en los estudiantes. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

A human cell polarity protein Lgl2 regulates influenza A virus nucleoprotein exportation from nucleus in MDCK cells

In this study, the regulatory effect of the overexpression of polarity protein Lgl2 on the nuclear export ofinfluenza A virus nucleoprotein in infected cells was investigated. A stable Tet-Off inducible MDCK cell lineexpressing a fusion protein comprising Lgl2 and an enhanced yellow fluorescent protein were used. TCID50analysis and neuraminidase activity analysis revealed that replication of influenza A virus was inhibited in Lgl2overexpressing cells. By immunofluorescence microscopical observation at different time point post virusinfection, a retention of NP in cellular nucleus was found in Lgl2 overexpressing cells. Compared with normalMDCK cells, change in claudin-1 distribution between cell contacts caused by Lgl2 overexpression impairedthe barrier function of tight junction. These results suggest that changes in cell polarity induced by Lgl2overexpressing will affect virus NP transportation.

MiR-506-3p suppresses the proliferation of ovarian cancer cells by negatively regulating the expression of MTMR6

MicroRNAs have been reported to play a crucial role in ovarian cancer (OC) as the most lethal malignancy of the women.Here, we found miR-506-3p was significantly down-regulated in OC tissues compared with corresponding adjacent nontumor tissues. Ectopic miR-506-3p expression inhibited OC cell growth and proliferation using MTT and colony formationassay. Additionally, flow cytometry analysis showed that the overexpression of miR-506-3p induced cell cycle G0/G1phase arrest and cell apoptosis in OC cells. A luciferase reporter assay confirmed that the myotubularin-related protein 6(MTMR6) was the target of miR-506-3p. The expression of MTMR6 was increased in OC tissues compared with adjacenttissues using immunohistochemistry. Elevated MTMR6 protein levels were confirmed in OC cells lines compared withimmortalized fallopian tube epithelial cell line FTE187 using western blotting. In addition, knockdown of MTMR6 imitatedthe effects of miR-506-3p on cell proliferation, cell cycle progression and apoptosis in OC cells. Furthermore, rescueexperiments using MTMR6 overexpression further verified that MTMR6 was a functional target of miR-506-3p. Our dataindicate that miR-506-3p might serve as a tumor suppressor gene and propose a new regulatory mechanism of MTMR6 bymiR-506-3p in OC.