p38丝裂原活化蛋白激酶在雄性小鼠生殖细胞株中的表达

目的 检测p38 丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)在雄性小鼠生殖细胞株TM4、GC-1spg、GC-2spd(ts)中的表达,为深入研究p38 MAPK基因在雄性小鼠精子发生中的作用机制奠定理论基础.方法 应用逆转录-多聚合酶链反应(RT-PCR)检测雄性小鼠生殖细胞株TM4、GC-1spg、GC-2spd(ts)中p38 MAPK基因的表达.结果 p38 MAPK基因在TM4、GC-1spg、GC-2spd(ts)细胞株中均为阳性表达.结论 p38 MAPK基因的表达在雄性小鼠精子发生中可能发挥重要作用.     

邻苯二甲酸二(2-乙基己基)酯对小鼠精母细胞JAZF1mRNA及孤核受体TR4蛋白表达的影响

目的 研究邻苯二甲酸二(2-乙基己基)酯(DEHP)对小鼠精母(GC-2 spd)细胞JAZF1 mRNA及TR4蛋白表达的影响.方法 将GC-2 spd细胞置于含终浓度为0(溶剂对照)、50、100、200 μmol/L DEHP的培养液培养24 h.采用Real-time PCR方法检测细胞JAZF1 mRNA的相对表达水平,采用Western blot检测TR4蛋白表达水平.结果 与对照组比较,50、100、200 μmol/L DEHP染毒组GC-2 spd细胞的JAZF1 mRNA表达升高,而200 μmol/L DEHP染毒组GC-2 spd细胞的TR4 蛋白表达下降,差异有统计学意义(P<0.05).结论 DEHP对生精细胞具有生殖毒性作用,可能通过JAZF1调控孤核受体TR4的表达从而影响雄性生殖功能.     

JMJD2B在人卵巢癌中的定位表达

目的：研究JMJD2B在人卵巢癌细胞株SKOV3中的定位和表达.方法：人卵巢癌细胞株SKOV3进行核浆分离,蛋白免疫印迹法检测细胞核和细胞浆中JMJD2B表达,PARP为细胞核标志物,β-tubulin为细胞浆标志物.激光共聚焦扫描显微镜检测内源JMJD2B在SKOV3细胞中的定位.结果：核浆分离的蛋白免疫印迹和激光共聚焦扫描纤维镜证实JM-JD2B主要定位于细胞核内,细胞浆仅有少量表达.结论：JMJD2B主要定位于卵巢癌细胞株SKOV3核内,可能是参与肿瘤细胞基因转录调控和蛋白表达的重要蛋白之一.     

Synaptotagmin1影响小鼠卵母细胞纺锤体组装和稳定

目的:确定Synaptotagmin1(Syt1)对小鼠卵细胞纺锤体组装和稳定的影响。方法:免疫荧光法检测Syt1在小鼠卵母细胞发育不同时期的亚细胞定位。用紫杉醇处理小鼠MⅠ期卵母细胞,明确Syt1与微管动力的关系。注射Syt1特定的寡聚核苷酸降调卵母细胞中Syt1的表达,免疫荧光法检测Syt1降调后卵母细胞纺锤体的形态变化、染色体异常以及中心体蛋白γ-tubulin定位变化。结果:Syt1在卵母细胞减数分裂成熟的不同发育阶段都有表达,主要集中分布皮质区和MⅠ和MⅡ期纺锤体的两极。Syt1在MⅠ和MⅡ期与中心体相关蛋白γ-tubulin共定位。紫杉醇实验发现Syt1集中定位于星体和高度集中的微管两极。降调Syt1表达后,染色体排列紊乱,纺锤体组装异常比例升高,且大多数为无极、单极或者多级纺锤体,其次有拉长纺锤体和形态各异纺锤体。并影响微管组织中心相关蛋白γ-tubulin的正确定位。结论:Syt1可能作为一种微管组织中心相关蛋白调节纺锤体的组装稳定。     

CDC14B在小鼠1-细胞期受精卵各细胞周期的动态表达及其定位

目的：检测小鼠1-细胞期受精卵各细胞周期中细胞分裂周期蛋白14B（CDC14B）的表达水平及其定位,初步阐明CDC14B对哺乳动物受精卵早期发育调控的机制。方法：通过超排卵技术分别收集小鼠1-细胞期受精卵,采用RT-PCR和Western blotting法检测小鼠不同细胞周期1-细胞期受精卵中CDC14B mRNA和蛋白表达水平;采用细胞免疫荧光法观察小鼠不同细胞周期1-细胞期受精卵中CDC14B和β微管蛋白（β-tubulin）的共定位情况。结果：与G₁期比较,小鼠S、G₂和M期1-细胞期受精卵中CDC14B mRNA和蛋白表达水平明显升高（P<0.05或P<0.01）。间接免疫荧光实验,CDC14B（红色荧光）和β-tubulin（绿色荧光）在G₁期和S期共定位于小鼠受精卵皮质;在G₂早期,CDC14B和β-tubulin共定位于皮质和细胞质;在G₂晚期,部分CDC14B入核;在M期,CDC14B和β-tubulin共定位于纺锤体。结论：CDC14B在小鼠不同细胞周期1-细胞期受精卵中动态表达,CDC14B存在核浆纺锤体转位,CDC14B的定位变化可能调控纺锤体的功能。     

姜黄素通过调控微管系统干扰HepG2细胞周期研究

目的 研究姜黄素对人肝癌HepG2细胞周期的影响及微管系统在其中的作用。方法 MTT法检测姜黄素对人肝癌HepG2细胞增殖的抑制作用;流式细胞仪分析姜黄素对HepG2细胞周期分布的影响;激光共聚焦显微镜观察姜黄素对HepG2细胞微管结构变化的影响;Western blotting 检测姜黄素对微管蛋白α-tubulin表达的影响;在离体条件下,观察姜黄素对微管蛋白聚合和解聚活性的影响。结果 姜黄素对HepG2细胞增殖具有抑制作用且与时间和剂量相关;随着姜黄素浓度的升高,HepG2细胞阻滞于G₂/M期的比例也逐渐增加;激光共聚焦显微镜观察可见姜黄素明显破坏细胞微管结构,改变细胞微管蛋白聚合状态的发生;Western blotting检测发现细胞内α-tubulin蛋白表达的减弱与试药浓度相关。姜黄素还可影响微管蛋白聚合和解聚活性。结论 姜黄素通过破坏HepG2细胞的微管结构及下调微管蛋白α-tubulin的表达,将HepG2细胞阻滞于G₂/M期,从而抑制肝癌HepG2细胞的生长。     

利用蛋白转导技术将α-烯醇化酶导入心肌细胞的实验研究

目的 探讨将外源α-烯醇化酶导入心肌细胞的可行性,为后续的蛋白功能研究奠定基础.方法 原代培养WKY乳鼠心肌细胞,将纯化的α-烯醇化酶与蛋白转导载体Charoit共孵育后转染心肌细胞,同时设置阳性对照β-半乳糖苷酶转染组,光镜下计数转染阳性细胞的百分率;蛋白免疫印迹检测细胞总蛋白中α-烯醇化酶的表达;荧光共聚焦显微镜下观察α-烯醇化酶的亚细胞定位.结果 Charoit能够将外源蛋白成功导入原代培养的心肌细胞中,光镜下可见β-半乳糖苷酶的导入效率约为81%,Western blot结果表明外源α-烯醇化酶成功导入了心肌细胞,免疫荧光显示导入的外源α-烯醇化酶与内源α-烯醇化酶相似,主要定位于胞浆.结论 利用Charoit介导的蛋白转导技术能够成功将外源α-烯醇化酶导入心肌细胞.     

PDGF-BB诱导肺动脉平滑肌细胞表型转换时细胞骨架的变化

目的 研究血小板衍生生长因子（PDGF-BB）诱导大鼠肺动脉平滑肌细胞（PASMCs）表型转换时细胞骨架构象的改变，探讨PASMCs表型转换的机制。 方法 原代培养并鉴定SD大鼠PASMCs，将PASMCs分为对照组（细胞不加诱导剂培养24 h）、实验组（细胞用PDGF-BB 10 ng/mL诱导培养24 h）；实时荧光定量PCR（RT-qPCR）及Western blot检测细胞表型转化标志基因[α-肌动蛋白（α-SMA）、平滑肌22α蛋白（SM22α）]mRNA及相关蛋白的表达；免疫荧光法检测细胞骨架微丝F-actin及微管α-tubulin、β-tubulin的构象；CCK-8法检测细胞增殖能力及划痕实验观察细胞迁移能力。 结果 与对照组相比，PDGF-BB下调α-SMA及SM22α表达水平；细胞骨架荧光强度明显减弱，F-actin排列紊乱、边缘不规则、呈毛刺样，α-tubulin、β-tubulin形态模糊，表现为共定位；明显增强PASMCs增殖与迁移能力。 结论 PDGF-BB可能通过影响细胞骨架构象诱导PASMCs表型转换，进而改变细胞增殖及迁移能力。     

小鼠骨髓间质干细胞来源的胞外囊泡对尼古丁诱导的小鼠生精细胞损伤的修复作用

目的: 构建尼古丁诱导的小鼠生精细胞体外损伤模型,探讨小鼠骨髓间质干细胞来源的胞外囊泡(mouse bone marrow mesenchymal stem cell-derived extracellular vesicles, mBMMSCs-EVs)对于小鼠GC-1生精细胞损伤的修复作用。方法:采用不同浓度尼古丁(0、8、16、32 μg/mL)处理GC-1生精细胞24、48、72 h,通过MTT实验筛选尼古丁诱导GC-1生精细胞损伤的最适浓度和时间;将GC-1生精细胞分为对照组、尼古丁组、尼古丁+胞外囊泡组;通过MTT实验、Transwell实验和流式细胞术凋亡实验观察mBMMSCs-EVs干预前后受损生精细胞GC-1生物学特性的变化。结果:MTT实验结果表明,32 μg/mL尼古丁作用GC-1生精细胞24 h时,细胞增殖能力明显降低(P<0.05),mBMMSCs-EVs作用于尼古丁预处理后,细胞增殖能力明显增高(P<0.05）;与对照组相比,尼古丁组GC-1生精细胞迁移能力明显降低,细胞凋亡能力明显升高(P均<0.01),与尼古丁组相比,尼古丁+胞外囊泡组生精细胞增殖和迁移能力明显升高,细胞凋亡能力明显下降(P<0.01或<0.05)。结论:mBMMSCs-EVs可以逆转尼古丁引发的GC-1生精细胞增殖、迁移能力的损伤以及细胞凋亡。     

甲醛对小鼠生精细胞Bcl-2、Bax蛋白表达及超微结构改变的影响

目的:研究甲醛对小鼠睾丸生精细胞Bcl-2、Bax蛋白表达及超微结构的改变.方法:取24只雄性清洁级(ICR)小鼠,随机分为4组,每组6只,用0.2、2、20 mg/kg甲醛腹腔注射,每天一次,连续5 d,第6天用免疫组化法测定小鼠睾丸生精细胞的Bcl-2、Bax蛋白表达率;用电镜观察小鼠睾丸生精细胞超微结构变化.结果:小鼠睾丸生精细胞的Bcl-2蛋白表达率明显低于对照组,差异有显著性(P＜0.05),Bax蛋白表达率明显高于对照组,差异有显著性(P＜0.05);电镜观察结果显示,各浓度甲醛能使生精细胞的细胞核、染色质、线粒体等超微结构发生不同程度的病理改变.结论:甲醛可使小鼠生精细胞Bcl-2和Bax蛋白表达及超微结构发生显著性改变,从而诱导细胞凋亡.     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

CLINICAL SIGNIFICANCE OF SERUM CYTOKINES IL-1β,sIL-2R,IL-6,TNF-α,AND IFN-v IN ACUTE CORONARY SYNDROME

Objectives To explore serum cytokines levels (including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v) and their significance in patients with acute coronary syndrome (ACS) and the subsequent follow-ups, with attempt to estimate the role of various serum inflammatory markers in the diagnosis and assessment of ACS.Methods The study population include 40 patients with acute myocardial infarction (AMI), 40 patients with unstable angina pectoris (UAP), and 40 controls. Among the 80 patients, 60 patients attended a follow up 4 months later. Serum inflammatory markers including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v were measured by enzyme linked immunosorbent assay.Results Serum IL- 1 β, sIL-2R, IL-6, TNF-α were significantly higher in AMI group or UAP group compared to the control group and became significantly lower 4 months later in the follow-up patients. Serum levels of IFN-v shows no significant difference between AMI group or UAP group and controls, also showing no significant change when measured in follow up patients. There was no correlation between serum creatine kinase-MB isoenzyme levels and serum inflammatory markers either in UAP or AMI group. Furthermore, when divided into two subgroups using Wagner's QRS scoring system in the AMI group, there is no difference of each serum inflammatory marker between ≤ 6 scores group and ＞ 6 scores group.Conclusion Serum levels of certain inflammatory markers may have some diagnostic value for ACS, and can be a useful marker reflecting disease stability.