男子赛艇运动员与训练有关的有氧无氧能力和激素变化

观察了１５名男子赛艇运动员为期３０周训练中最大做功能力、最大乳酸值、最大摄氧量及心脏形态和功能的变化及相应时期的血清睾酮、游离睾酮、皮质醇的急慢性效应。在以力量训练为主的准备期，变化较小，以专项训练为主的准备期，心功能和有氧能力明显改善。最大负荷后及高强度训练１２周后，血清睾酮降低。提示在不同训练周期中力量—耐力训练应合理安排，有利于发挥机体适应能力。     

谈兴奋剂对运动员身心的危害

本文从人体正常分泌的激素对肌肉运动能力的积极影响入手，进而分析了参赛运动员以及正当方式使用人体内不存在的物质，人为地、不公平地运动成绩现象，目前，兴奋剂已成为竞技体育中的国际公害，它对运动员的身心造成了伤害，扭曲体育精神，应予以制止。     

Risk of venous thromboembolic disease in postmenopausal women taking oral or transdermal hormone replacement therapy

Objective  

The influence of hormone replacement therapy (HRT) on hemostasis processes depends on the type of hormone, the combination of doses, the time of taking HRT, and the route of administration (oral, transdermal, implanted). The aim of the current study was to assess some parameters of coagulation, especially tissue factor pathway inhibitor (TFPI) and tissue factor (TF) in postmenopausal women using oral or transdermal HRT.     

女童乳房提前发育与血浆FSH、PRL、E_2等激素关系的研究及在体育选材中的意义

女童乳房提前发育与血浆ＦＳＨ、ＰＲＬ、Ｅ＿２等激素关系的研究及在体育选材中的意义吴明方（苏州大学２１５００６）ＯｎｔｈｅＲｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎＥａｒｌｙＢｒｅａｓｔＤｅｖｅｌｏｐｍｅｎｔｏｆＹｏｕｎｇＧｉｒｌｓａｎｄｔｈｅｉｒＳｅｒｕ...     

泌乳期二花脸猪和大白猪部分激素和生长因子的比较

动物泌乳受多种激素和因子的调节 ,除催乳激素 (PRL)外 ,还有生长激素 (GH)、胰岛素 (Insulin)、甲状腺素 (T3、T4)及胰岛素样生长因子 (IGF Ⅰ )等。通过对泌乳期二花脸猪和大白猪血浆GH、Insulin、T3、T4和IGF Ⅰ含量的比较 ,结果是大白猪 (LWS)血浆GH总体水平、基线水平、峰强度均高于二花脸猪 (EHS) ,分别高 1 9.84%、2 0 .5 4 %和 69.88% ,血浆Insulin、IGF Ⅰ均显著高于二花脸猪 (P <0 .0 5 ) ,分别高 5 0 .46%和 5 5 .45 % ,而二花脸猪血浆T3、T4显著高于大白猪 (P <0 .0 5 ) ,分别高 1 9.42 %和 1 7.89%。     

过度训练对大鼠垂体—性腺轴的影响

为了探讨过度训练对机体垂体—性腺轴的影响,通过ＳＤ大鼠进行力竭力性游泳训练建立过度训练模型,并测定血清睾酮（Ｔ）、黄体生成素（ＬＨ）和皮质醇（Ｃ）的含量。结果表明：过度训练可抑制的诊断和预防具有一定的指导意义。     

Identification and characterization of profilin gene family in rice

BackgroundProfilin proteins (PRFs) are small (12–15 kD) actin-binding protein, which play a significant role in cytoskeleton dynamics and plant development via regulating actin polymerization. Profilins have been well documented in Arabidopsis, Zea mays L. as well as Phaseolus vulgaris, however no such fully characterization of rice (Oryza sativa L.) profilin gene family has been reported thus far.ResultIn the present study, a comprehensive genome-wide analysis of rice PRF genes was completed and three members were identified. OsPRF1 and OsPRF2 shared 98.5% similarity (6 nucleotide divergence), but the deduced amino acid sequences of OsPRF1 and OsPRF2 are fully identical. In contrast, the OsPRF3 presents relatively lower similarity with OsPRF1 and OsPRF2. Phylogenetic analysis also support that OsPRF1 has a closer relationship with OsPRF2. Expression pattern analysis revealed the differential expression of OsPRFs in tissues of mature plant, which suggested the potential spatial functional specificity for rice profilin genes. Subcellular localization analysis revealed the OsPRFs were localized in cytoplasm and nucleus and all of them could bind actin monomers. Furthermore, abiotic stresses and hormones treatments assay indicated that the three OsPRF genes could be differentially regulated, suggesting that OsPRF genes might participate in different stress processes in rice.ConclusionsTaken together, our study provides a comprehensive analysis of the OsPRF gene family and will provide a basis for further studies on their roles in rice development and in response to abiotic stresses.How to cite: Zhang Y, Dong G, Wu L, et al. Identification and characterization of profilin gene family in rice. Electron J Biotechnol 2021;54. https://doi.org/10.1016/j.ejbt.2021.08.004.     

热及运动条件下应激反应激素变化与免疫反应

对国内外有关热条件下应激反应激素变化与免疫反应、热环境下运动身体激素变化及免疫反应的最新研究成果进行了分析研究与综述     

SARCOPENIA发生机制与干预措施的研究进展

目前,世界人口老龄化现象愈加严重。Sarcopenia是一种随增龄而发生的病理现象,其主要征状表现在骨骼肌肌肉质量、体积以及肌肉力量下降。随增龄发生的肌纤维萎缩、骨骼肌蛋白合成减少、骨骼肌线粒体功能紊乱等都可能是导致老年个体发生sarcopenia的原因。此外,老年个体体内激素水平变化也可能是促成sarcopenia的原因。有研究表明,抗阻运动及激素替代疗法是延缓或削减sarcopenia发生的有效的方法。因此,深入研究了解衰老个体sarcopenia发生的分子进程对于寻求探索更新更好的sarcopenia治疗方法意义重大。     

运动与免疫研究概况

就运动与体液免疫、运动与免疫细胞的关系、运动对免疫系统激素调节影响的研究进行了综述。