白藜芦醇对耐力训练小鼠抗氧化能力的影响

研究白藜芦醇对耐力训练小鼠抗氧化能力和线粒体游离钙含量的影响．选用昆明小鼠,根据体重将72只小鼠随机分为三组：A组为安静对照组;B组为耐力训练组;C组为耐力训练＋白藜芦醇组．C组小鼠每日给予白藜芦醇10mg／kg灌胃,与B组共同进行6w递增负荷游泳训练,再进行力竭游泳实验．力竭游泳后24h处死小鼠取材,测定小鼠骨骼肌、心脏、胸腺,脾脏、肾脏、肝脏线粒体和红细胞SOD、GSH-Px活性及MDA含量。以及肝脏线粒体游离钙的含量．6w递增负荷耐力训练后,B组小鼠骨骼肌、心肌、肝脏线粒体、脾脏、胸腺和红细胞SOD活性,心肌、脾脏和红细胞的GSH—Px活性均显著低于A组（P〈0．05）,同时骨骼肌、肝脏线粒体、脾脏和红细胞的MDA含量显著高于A组（P〈0．05）。肝脏线粒体游离钙含量显著高于A组（P〈0．05）;白藜芦醇干预使C组小鼠骨骼肌、肝脏线粒体和脾脏SOD活性,骨骼肌和心肌的GSH—Px活性显著高于B组（P〈0．05）,同时骨骼肌、肝脏线粒体、胸腺和红细胞的MDA含量显著低于B组（P〈0．05）;肝脏线粒体游离钙含量显著低于B组（P〈0．05）．提示白藜芦醇一定程度上能提高耐力训练小鼠抗氧化能力,维持线粒体游离钙含量在正常水平,具有延缓运动性疲劳发生的作用．     

产后康复宁对小鼠毒性LD_(50)测定

产后康复宁煎剂对小白鼠急性毒性试验结果,LD_(50)为51.286±0.578g/kg。实验结果表明,产后康复宁毒性较小,为低毒无害之品,可应用于临床。     

浅议贵州三都水族民俗体育“打老鼠”

各个少数民族历来都有着悠久的历史,他们的运动项目各有千秋,妙趣横生,源于战国时期的贵州三都水族传统体育运动＂打老鼠＂,具有独特的教育性、健身性、娱乐性、竞技性和广泛的群众性等功能本文采用实地访谈、田野调查、收集图片文献资料等方法,对三都水族＂打老鼠＂进行调查研究,同时针对打老鼠的运动特性、比赛方法和形式进行探讨。     

急性力竭运动对小鼠器官脂质过氧化反应的比较

通过对急性力竭游泳的小鼠脑、心、肝、肾及骨骼肌中MDA含量与GSH-px的测定,分析比较急性力竭运动时体内主要器官脂质过氧化反应及其差异.得到结果:力竭游泳后各器官MDA含量都有不同程度的增加,然而,仅心脏和骨骼肌中的增加有统计学意义.而GSH-px活力却都有一定的降低,但也只有心脏中的降低有统计学意义.提示急性力竭游泳对机体造成的脂质过氧化反应主要危害心脏和骨骼肌.     

Transgenic Mice as Future Tools in Risk Assessment

Historically, mice have served a routine and useful purpose in the research, development, and testing of biologicals, chemicals, and drugs for efficacy, toxicity, and carcinogenic risk. The literature is replete with examples using mice to study organic compounds both in short-term tests involving tumor initiation and promotion and in long-term experiments dealing with fertility, reproduction, and teratology. During the past two decades, a virtual explosion of advances has occurred in modern biology that includes the discoveries of retroviruses, oncogenes, DNA restriction enzymes, nucleotide sequence analyses, and microinjection techniques. Fusion of these milestones in genetic, molecular, and cell biology with recent developments in mouse embryology has opened novel avenues and methods of experimentation as significant additions to the risk assessment armamentarium that currently uses both prokaryotes and eukaryotes. Some promising directions afforded by transgenic mice as powerful future tools in risk assessment will be summarized below.     

游泳运动对小白鼠某些组织中MDA含量及SOD活性的影响

测定了小白鼠７０ｍｉｎ游泳运动后脑、心、肝、肾、肌组织中自由基的含量。结果表明，７０ｍｉｎ游泳运动显著降低了小白鼠心肌、肝脏、肾脏和肌肉中的丙二醛（ＭＤＡ）含量，而肝脏、肾脏和肌肉中的超氧化物岐化酶（ＳＯＤ）活性明显提高，且心肌中ＳＯＤ活性亦呈升高趋势。据此可推测，７Ｏｍｉｎ游泳运动提高了小白鼠的抗氧化能力，加快了体内自由基的清除速率，减少了脂质过氧化物（ＬＰＯ）的堆积。     

游泳训练对小鼠抗氧化能力的影响

通过测定经训练和未经训练小鼠一次力竭游泳后血浆、心脏、脑和骨骼肌中丙二醛 (MDA)含量和谷胱甘肽过氧化物酶 (GSH -px)活性 ,比较两组小鼠血浆、心、脑和骨骼肌中自由基损伤程度 ,探讨体育锻炼对机体抗自由基损伤的保护作用 .结果 :同样一次力竭性游泳 ,经训练组小鼠血浆、心脏、脑和骨骼肌中MDA含量显著低于未训练组 (P <0 .0 5 ) ,而GSH -px活性却显著增高 (P <0 .0 5 ) .提示经常性的体育锻炼可提高机体抗氧化能力 ,减轻OFR引发的脂质过氧化损伤     

Dose‐Response Model of Coxiella burnetii (Q Fever)

Q fever is a zoonotic disease caused by the intracellular gram‐negative bacterium Coxiella burnetii (C. burnetii), which only multiplies within the phagolysosomal vacuoles. Q fever may manifest as acute or chronic disease. The acute form is generally not fatal and manifestes as self‐controlled febrile illness. Chronic Q fever is usually characterized by endocarditis. Many animal models, including humans, have been studied for Q fever infection through various exposure routes. The studies considered different endpoints including death for animal models and clinical signs for human infection. In this article, animal experimental data available in the open literature were fit to suitable dose‐response models using maximum likelihood estimation. Research results for tests of severe combined immunodeficient mice inoculated intraperitoneally (i.p.) with C. burnetii were best estimated with the Beta‐Poisson dose‐response model. Similar inoculation (i.p.) trial outcomes conducted on C57BL/6J mice were best fit by an exponential model, whereas those tests run on C57BL/10ScN mice were optimally represented by a Beta‐Poisson dose‐response model.     

密穗马先蒿提取物对小鼠血液学指标的影响

观察密穗马先蒿提取物对运动小鼠血液学指标的影响,探讨其对运动引起贫血的保护作用.4周龄昆明种小鼠随机分为对照组、运动组、阳性对照组、密穗马先蒿组.运动组、阳性对照组和密穗马先蒿组进行4周的游泳训练,最后一次力竭游泳后采用心脏取血,肝素抗凝,运用血细胞分析仪测定血液学指标.实验4周后,运动组小鼠RBC、Hb和HCT均低于其他3组,呈显著性差异(P<0.05),但对照组、阳性对照组、密穗马先蒿组之间比较差异无显著性(P>0.05);运动组MCV显著大于其他3组,呈显著性差异(P<0.01),其他3组之间比较无显著性差异(P>0.05).结果表明密穗马先蒿具有改善大强度训练所引起的小鼠RBC、Hb、HCT、MCV等改变.     

壳寡糖对运动小鼠自由基代谢的影响

研究壳寡糖对运动小鼠血浆和骨骼肌组织自由基代谢的影响.将4周龄昆明种小鼠随机分为对照组、运动组、壳寡糖组.运动组和壳寡糖组进行4周的爬杆训练,最后一次进行力竭爬杆后采用心脏取血,肝素抗凝,测定血浆超氧化物歧化酶(SOD)的活性,丙二醛(MDA)含量.同时取后肢骨骼肌测定SOD活性和MDA含量.实验4周后,壳寡糖组力竭时间明显延长(P＜0.01),血浆和骨骼肌SOD活性均高于运动组(P＜0.01),而MDA显著低于运动组(P＜0.01);与对照组比较均无显著性差异(P＞0.05).结果表明小鼠服用壳寡糖具有抗疲劳作用,减轻自由基介导的脂质过氧化反应.