螺旋藻对递增大强度运动诱导大鼠海马形态结构损伤和BDNF表达变化的影响

目的采用大鼠大强度跑台运动模型,以人参作为阳性对照,探讨不同剂量螺旋藻补充对运动诱导的大鼠海马形态结构损伤及脑源性神经营养因子(BDNF)海马区表达的影响。方法将50只SD大鼠随机分为正常对照组(NC组)、运动模型组(EM组)、运动+螺旋藻灌胃组(ESⅠ组)、运动+螺旋藻高剂量组(ESⅡ组)和阳性对照组(PC组)。每组10只。观察螺旋藻低、高剂量补充对运动大鼠体重等一般情况、血清LDH活性和BUN含量、海马CA1区微细形态结构和BDNF表达的影响。结果 (1)实验第三周末,ESⅠ组和ESⅡ组疲劳相关症状得到减轻,大鼠食欲和体重增加。(2)与EM组比较,ESⅡ组大鼠血清LDH活性增加和BUN含量明显降低(均P0.01)且较PC组已无明显差异(P0.05)。(3)EM组海马CA1区神经元数目、胞浆尼氏小体数目明显减少;而ESⅠ组和ESⅡ组海马神经元损伤均较EM组明显减轻,神经元数目、尼氏小体数量逐渐增多。(4)与EM组比较,ESⅠ组和ESⅡ组大鼠海马BDNF蛋白表达均增加,但ESⅡ组增加更为明显(P0.01);与PC组比较,ESⅡ组和ESⅠ组BDNF蛋白表达均降低,但ESⅠ组降低更为明显(P0.01)。结论螺旋藻低、高剂量补充可改善运动所致的海马形态结构损伤,其中高剂量组的改善效果要优于低剂量组,其原因可能与高剂量螺旋藻补充能较好的上调海马区BDNF蛋白表达,进而对运动大鼠表现出明显的神经保护作用有关。     

外源性VD3缓解运动诱导的慢性疲劳综合症的机制

研究了补充VD3缓解运动诱导的慢性疲劳综合症(CFS)的机制。将80只小鼠随机分5组(n=16),即安静对照组(C组)、CFS造模组(CFS组)、VD3组又分为造模前组(bVD组)、过程中组(mVD组)和造模后VD干预组(aVD组)。造模、干预持续4周,全程行为学观察,4周后进行力竭测试和悬尾实验,再迅速采血并切取股四头肌组织。测定血睾酮、血清皮质酮及股四头肌组织的MDA、T-AOC、GSH-PX和T-SOD,采用Western Blotting测定SIRT1、SIRT3、ERK1/2、p-ERK1/2和MEK1/2。结果表明:与C组比较,CFS组小鼠打斗损伤严重,血睾酮及MEK、SIRT3显著降低(P0.05),皮质酮、MDA、T-SOD、GSH-PX显著增加(P0.05);与CFS组比较,VD干预组小鼠打斗损伤较轻,皮质酮、MDA显著降低(P0.05),血睾酮、T-AOC、T-SOD、GSH-PX及MEK、SIRT1、SIRT3和p-ERK/ERK均显著增加(P0.05)。外源性补充VD3可提高骨骼肌抗氧化能力,缓解运动诱发的CFS症状,其机制可能是通过激活MEKs/ERKs-SIRT1信号通路,降低MEK表达,增加ERK磷酸化水平,上调SIRT1和SIRT3表达而实现。     

运动通过Parkin抗凋亡通路抑制AD小鼠海马细胞凋亡

目的:探讨Parkin抗凋亡通路在运动调控AD小鼠海马细胞凋亡过程中的作用。方法:购3月龄APP/PS1转基因AD小鼠共12只,适应性喂养后把实验小鼠随机分为转基因运动组(TE,N=6)和转基因对照组(TC,N=6),选同系野生型小鼠作为正常对照组(C,N=6)。TE组给予10周的跑台运动,C组和TC组安静饲养。运动结束后取海马组织,用RT-PCR法检测各组小鼠海马Parkin、NEMO、OPA1、Caspase-3、cyt-c、Caspase-8、Caspase-6mRNA表达情况。结果:APP/PS1转基因小鼠海马内Parkin、NEMO、OPA1mRNA表达显著降低,cyt-c、Caspase-3、Caspase-6、Caspase-8mRNA表达显著升高。与TC组相比,TE组小鼠海马cyt-c、Caspase-3、Caspase-6、Caspase-8mRNA表达水平显著降低,而Parkin、NEMO、OPA1mRNA表达显著增高。结论:10周中等强度的跑台运动通过激活Parkin-NEMO-OPA1抗细胞凋亡通路,下调AD小鼠海马cyt-c、Caspase-3、Caspase-6、Caspase-8mRNA的表达,增强AD转基因小鼠海马神经细胞抗凋亡能力。     

毛蕊花苷和马蒂苷对递增大强度运动大鼠心肌和骨骼肌细胞线粒体过氧化损伤的保护作用

目的研究毛蕊花苷和马蒂苷对递增大强度运动大鼠心肌和骨骼肌细胞线粒体过氧化损伤的影响.方法将40只大鼠随机分成正常对照组、单纯运动组、运动+毛蕊花苷组和运动+马蒂苷组.观察毛蕊花苷和马蒂苷对运动大鼠心肌和骨骼肌线粒体 SOD 酶活性和 MDA 含量的影响.结果运动+毛蕊花苷组和运动+马蒂苷组大鼠心肌细胞线粒体SOD酶活性明显高于单纯运动组(P<0.01);而MDA含量明显低于单纯运动组(P<0.01).运动+毛蕊花苷组大鼠心肌细胞线粒体MDA含量低于运动+马蒂苷组(P<0.01);而SOD酶活性与运动+马蒂苷组比较,差异无显著性(P>0.05).单纯运动组大鼠骨骼肌细胞线粒体SOD酶活性低于运动+毛蕊花苷组(P<0.01);与运动+马蒂苷组比较,差异无显著性(P>0.05);而MDA含量明显高于运动+毛蕊花苷组和运动+马蒂苷组(P<0.01).运动+毛蕊花苷组大鼠骨骼肌细胞线粒体SOD酶活性高于运动+马蒂苷组(P<0.05);而MDA含量明显低于运动+马蒂苷组(P<0.01).结论毛蕊花苷和马蒂苷具有提高跑台运动大鼠心肌和骨骼肌细胞线粒体SOD酶活性,促进其自由基清除的作用.且毛蕊花苷的作用强于马蒂苷.     

替米沙坦对血管紧张素Ⅱ诱导的心肌细胞肥大及p-ERK1/2的调节作用

观察替米沙坦(Telmisartan)对血管紧张素Ⅱ(Ang Ⅱ)诱导的心肌细胞肥大及p-ERK1/2表达的影响.通过培养新生大鼠心肌细胞,用相差显微镜计数心肌细胞搏动频率、细胞图像分析系统测量细胞体积、考马斯亮蓝法测定心肌细胞总蛋白含量、[3H]-亮氨酸掺入法测定蛋白合成速率作为心肌肥大指标;以ERK免疫沉淀活性试剂盒测定ERK活性;用Western-blot测定p-ERK1/2表达.实验结果显示Telmisartan能显著降低Ang Ⅱ诱导的心肌细胞搏动频率、体积、总蛋白含量、蛋白合成速率上升,同时对p-ERK1/2表达具有剂量、时间依赖性抑制作用.因此考虑Telmisartan可以抑制Ang Ⅱ诱导的心肌细胞肥大,其机制与抑制p-ERK1/2表达有关.     

中药沙苑子抗疲劳作用研究

探讨中药沙苑子对大鼠脑组织EAA,IAA含量的影响及其抗疲劳作用,为沙苑子在运动生物学方面的应用提供实验依据。建立运动疲劳动物模型,测试大鼠脑组织海马、间脑脂肪族EAA,IAA含量,Glu/GABA比值变化和大鼠运动至运动疲劳的时间。与安静对照组比较,运动对照组海马和间脑EAA含量均下降(P<0.05),IAA含量均升高(P<0.01/P<0.05);运动加沙苑子组海马EAA含量下降(P<0.05),IAA含量升高(P<0.05);间脑EAA中Glu含量下降(P>0.05),Asp含量下降(P<0.05),IAA中,GABA含量升高(P<0.01/P<0.05)。与运动对照组比较,运动加沙苑子组海马和间脑EAA含量均升高(P>0.05),IAA含量均下降(P<0.05)。与安静对照组比较,运动对照组、运动加沙苑子组两个脑区的Glu/GABA比值下降(P<0.01/P<0.05);与运动对照组比较,运动加沙苑子组两个脑区Glu/GABA比值升高(P<0.01)。运动加沙苑子组运动至疲劳的时间比运动对照组延长(P<0.05)。沙苑子可以影响海马、间脑脂肪族EAA,IAA含量及Glu/GABA比值,延缓中枢神经疲劳的发生,提高大鼠抗疲劳水平。     

氢吗啡酮对炎性痛大鼠脊髓ERK1/2信号通路的影响

目的 探讨氢吗啡酮对炎性痛大鼠脊髓ERK1/2信号通路的影响.方法 选择SPF级雄性大鼠30只,随机分为3组,正常组、模型组和氢吗啡酮组;检测各组大鼠热痛阈和机械痛阈;ELISA检测血清中TNF-α、IL-6和IL-10的含量;Western blot检测各组大鼠脊髓中ERK1/2和p-ERK1/2蛋白表达水平;qRT...     

三七皂苷对运动性贫血大鼠海马Bcl-2表达的影响

探讨了三七皂苷对运动性贫血大鼠海马Bcl-2表达的影响.将24只健康雄性4周龄SD大鼠随机分为对照组、运动组和运动给药组,对运动组和运动给药组大鼠进行为期10周的递增负荷跑台运动,并从第5周开始对运动给药组大鼠进行三七皂苷药物干预,对其他各组喂饲等量生理盐水.应用Real-time PCR检测海马组织Bcl-2mRNA的基因表达情况;应用ELISA测定海马组织Bcl-2的蛋白含量.结果表明:运动组海马Bcl-2mRNA表达量和Bcl-2蛋白含量显著低于对照组(P0.05),运动给药组海马Bcl-2mRNA表达量和Bcl-2蛋白含量显著高于运动组(P0.05),运动给药组海马Bcl-2mRNA表达量和Bcl-2蛋白含量与对照组相比均无显著性差异.结果提示:三七皂苷能促进运动性贫血大鼠海马Bcl-2的表达,有效抑制大鼠海马神经元凋亡,对运动性贫血造成的脑缺血缺氧性损伤有保护作用.     

补虚化瘀法对产后抑郁低雌激素大鼠海马核糖体S6激酶和丝裂原活化细胞外调节激酶1的影响

探讨补虚化瘀方药参归仁合剂对产后抑郁大鼠海马神经元内胞外信号调节激酶1/2(ERK1/2)通路的影响,测定P90核糖体S6激酶(RSK1)和丝裂原活化细胞外调节激酶1(MEK1)蛋白表达量。用56只雌性大鼠分为正常组、模型组、参归仁高、中、低剂量组(7、3.6、1.8 g·kg~(-1)·d~(-1))、盐酸舍曲林组(4.5 mg·kg~(-1)·d~(-1))、苯甲酸雌二醇组(10μg·d~(-1))。除正常组外,其余各组均采用苯甲酸雌二醇和黄体酮造模,模拟产后抑郁状态。使用蛋白质免疫印迹法检测其海马P-RSK1和P-MEK1的蛋白表达量。结果与模型组比较,参归仁中剂量组和舍曲林组在海马组织中P-RSK1蛋白表达水平明显增加(P0.01);与模型组比较,参归仁中剂量组、舍曲林组和苯甲酸雌二醇组在海马组织中P-MEK1蛋白表达水平明显增加(P0.01)。证明参归仁合剂可增加海马组织中P-RSK1和P-MEK1蛋白表达量,且参归仁中剂量组效果显著,参归仁合剂可起到抗抑郁作用。     

葱白提取物对心肌梗死大鼠促血管新生作用及机制研究

目的探讨葱白提取物（fistular onion bulb,FOB）对促血管新生（angiogenesis）的作用及其机制。方法将SD大鼠,随机分成葱白提取物组、麝香保心丸组、模型组、假手术组,每组10只。在适应性喂养1周后,行左冠脉前降支结扎造模。CD34免疫组化染色观察心肌梗死边缘区微血管数量（microvessel quantity,MVQ）及微血管密度（microvessel density,MVD）;ELISA法检测血清转化生长因子-β(transforming growth factor-β,TGF-β)含量;Western Blot法检测大鼠左室心肌组织丝裂原激活蛋白激酶（mitogen activated protein kinase,MEK）、细胞外信号调节激酶（extracellular singnal-regulated kinase,ERK）蛋白含量;RT-PCR法检测心肌梗死边缘组织MEK、ERK mRNA表达量。结果与模型组相比,葱白提取物组、麝香保心丸组在CD34染色后心肌梗死边缘区微血管计数大幅升高（P <0.01）;葱白提取物组微血管计数低于麝香...     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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