Relationship between physical activity, motor skills and physical condition among 12-14 year-old adolescents / 中国学校卫生

Objective@#The purpose of this study is to explore the interactive correlations and the influence of physical activity and motor skills on physical condition of adolescents, in order to provide a theoretical basis for adolescent s physical fitness promotion.@*Methods@#Random cluster sampling method was used to select 164 adolescents aged 12-14. The development of motor skills was measured by MABC 2(Movement Assessment Battery for Children 2), and physical activity was measured by ActiGraph GT3X+ type accelerometer. Physical fitness test selected "Chinese National Students Physical Fitness Standard(CNSPFS)" (for middle school students) in the 1 000/800 meters run, standing long jump and sitting forward flexion. Pearson correlation was used to analyze the correlations among physical activity, motor skills and physical fitness, and multiple stepwise regression was used to analyze the influence of physical activity and motor skills on physical fitness.@*Results@#There was a low degree of positive correlation between physical activity and physical condition( r=0.24-0.30, P <0.05); There was a low to moderate positive correlation between motor skills and physical condition( r=0.21-0.42, P <0.05). Physical activity and BMI could explain for 31% of cardiorespiratory endurance. Physical activity, object control and BMI could explain for 26% of muscle strength, balance skills could explain for 5% of flexibility.@*Conclusion@#There is a low to moderate correlation between physical activity, motor skills and physical fitness. Physical activity and motors skills are associated with adolescent s physical fitness level. Comprehensive interventions that promote the development of motor skills and participation in physical activity have practical significance for improving adolescents physical fitness.

Neuroprotective effects and mechanism of ethanol extract of Cistanche tubulosa against oxygen-glucose deprivation/reperfusion / 中国中药杂志

To investigate the inhibitory effects and mechanism of Cistanche tubulosa ethanol extract( CTEE) against oxygen-glucose deprivation/reperfusion( OGD/R)-induced PC12 cells neuronal injury. In this study,OGD/R-induced PC12 cells were used to explore the neuroprotective effects of CTEE( 12. 5,25,50 mg·L-1) by detecting cell viability with MTT assay,apoptosis with AO/EB and Hoechst 33258,mitochondrial membrane potential changes with JC-1 staining,mitochondrial oxidative stress with MitoSOX staining,as well as the apoptosis-related protein expression( PARP,cleaved PARP,caspase-3,cleaved caspase-3,Bax,Bcl-2) with Western blot. RESULTS:: showed that CTEE effectively protected OGD/R-induced neuronal injury and increased the survival rate of PC12 cells.AO/EB and Hoechst 33258 staining showed that CTEE could effectively inhibit apoptosis. Moreover,JC-1 and MitoSOX staining results showed that CTEE decreased mitochondrial stress and mitochondrial membrane potential imbalance in PC12 cells in a concentration-dependent manner. Meanwhile,CTEE could obviously suppress the activation of key proteins in mitochondrial apoptosis pathway such as caspase-3 and PARP,and significantly inhibit the rise of Bax and down-regulation of Bcl-2. In conclusion,CTEE has obvious protective effects on OGD/R-induced PC12 cells neuronal injury,potentially via inhibiting mitochondrial oxidative stress and apoptosis-related signaling pathway.

Targets identification and mechanism analysis for macrophage activation of low molecular weight saccharides from Cistanche deserticola based on molecular affinity chromatography / 中国中药杂志

This study aims to investigate the targets and targets-involved mechanism for the macrophage activation of low molecular weight saccharides from Cistanche deserticola (LMSC). The phagocytic activity and NO release of RAW264.7 cells were detected, and results showed that LMSC exerts immune activation effect by significantly increasing the phagocytic activity and NO release. LMSC-conjugated epoxy-activated sepharose beads were prepared as affinity reagent to capture the target proteins. Twenty-four proteins such as Eef2 were identified by LC-MS/MS analysis. Pathway enrichment analysis showed LMSC activated RAW264.7 cells by regulating Fcgamma receptor dependent phagocytosis, TNF-alpha NF-κB signaling pathway, glycolysis/gluconeogenesis and the citric acid cycle and respiratory electron transport pathway.

Macrophage activation by low molecular weight saccharides from Cistanche deserticola / 中国中药杂志

To investigate the immune activation effect and mechanism of low molecular weight saccharides from Cistanche deserticola(LMSC) on mouse peritoneal macrophages, RAW264.7 cells. The RAW264.7 cells were divided into the normal control group, LPS positive control group, and LMSC treatment groups. The RAW264.7 cells were treated with various concentrations of LMSC from 3.91 to 62.5 g•L ⁻¹. The neutral red assay was employed to detect the phagocytic activity of macrophages. NO release was detected by using NO kit, and macrophage activation associated protein expression levels (TNF-α, IL-6, IKKβ, p-IKKβ, IκBα, p-IκBα, NF-κB, and p-NF-κB) were detected by Western blot. Results showed that LMSC had an activation effect on macrophages; it can significantly increase the release of NO in RAW264.7 cells and promote the expression of cytokines TNF-α and IL-6. Moreover, LMSC significantly increased the phosphorylation of IKKβ, IκBα, and NF-κB p65. Furthermore, mannitol's one of the main constituents in LMSC significantly enhanced the phagocytic activity of macrophages. These results showed that LMSC could activate macrophages by up-regulating the NF-κB signaling pathway, and mannitol may be one of the main active components in LMSC.

Protosappanin A exerts anti-neuroinflammatory effect by inhibiting JAK2-STAT3 pathway in lipopolysaccharide-induced BV2 microglia / 中国天然药物

Microglial activation and resultant neuroinflammatory response are implicated in various brain diseases including Alzheimer's disease and Parkinson's disease. Treatment with anti-neuroinflammatory agents could provide therapeutic benefits for such disorders. Protosappanin A (PTA) is a major bioactive ingredient isolated from Caesalpinia sappan L.. In this work, the anti-neuroinflammatory effects of PTA on LPS-stimulated BV2 cells were investigated and the underlying mechanisms were explored. Results showed that PTA significantly inhibited the production of TNF-α and IL-1β in LPS-activated BV2 microglia. Moreover, the mRNA expressions of IL-6, IL-1β, and MCP-1 were reduced by PTA in a dose-dependent manner. Furthermore, PTA suppressed JAK2/STAT3-dependent inflammation pathway through down-regulating the phosphorylation of JAK2 and STAT3, as well as STAT3 nuclear translocation against LPS treatment. These observations suggested a novel role for PTA in regulating LPS-induced neuroinflammatory injuries.

Prevention and therapy progress in allograft rejection of high - risk corneal transplantation / 国际眼科杂志(Guoji Yanke Zazhi)

High - risk corneal transplantation immunological rejection is a primary factor affecting the success or failure of the corneal transplantation. As a result, application of immunosuppressive agent in high - risk corneal transplantation rejection reaction occupies an irreplaceable position. However, many local and systemic adverse reactions appeared in the process of application. In order to improve the achievement ratio of the corneal transplantation, experts and scholars at home and abroad have obtained remarkable achievements in dosage form, route of administration and drug combination;meanwhile, a considerable progress was also made in genetic engineering. This paper is a review of prevention and treatment on high - risk corneal graft rejection reaction.

Pectoralis major myocutaneous flap for repairing large tissue defects following oral cancer surgery / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the method for reconstruction of large tissue defects following surgical resection of advanced oral cancer using pectoralis major myocutaneous flap.</p><p><b>METHODS</b>From 2005 to 2009, 40 patients with advanced oral cancer received extensive surgical resection of oral cancer, and the intraoral defects were reconstructed using pectoralis major myocutaneous flaps.</p><p><b>RESULTS</b>All the flaps survived except one flap with partial necrosis.</p><p><b>CONCLUSION</b>Pectoralis major myocutaneous flap is effective for reconstruction of large tissue defects after resection of advanced oral cancer.</p>

Effect of skeletal muscle contraction on bone capillary permeability: an experimental study in rabbits / 南方医科大学学报

<p><b>OBJECTIVE</b>To assess the effect of muscle contraction on bone capillary permeability.</p><p><b>METHODS</b>Thirty female New Zealand white rabbits were randomly divided into the experimental and control groups (n=15). The bone chambers were implanted medially into the right tibiae of the rabbit, and in the experimental group, the rabbits were stimulated by transcutaneous electrical nerve stimulator (TENS) at 4 Hz (1 h/day, 6 days/week) starting from week 2. From week 3, intravital microscopic observation was carried out weekly till week 10, and the vasculature in the tibiae was observed under fluorescent microscope with FITC and RITC staining. All the images were analyzed by Metamorph program.</p><p><b>RESULTS</b>The bone capillary permeability increased significantly in the experimental group.</p><p><b>CONCLUSION</b>Skeletal muscle contraction can increase the capillary permeability.</p>