大鼠骨髓间充质干细胞的生物学特性研究

目的 建立大鼠骨髓间充质干细胞(MSCs)分离和培养扩增的方法。研究MSCs的生物学特性，为利用MSCs作为种子细胞治疗多种疾病提供实验基础。方法通过密度梯度离心、贴壁筛选法分离培养大鼠MSCs，测定其接种贴壁率；在倒置显微镜下连续观察细胞的形态变化，利用MTT法测定MSCs生长曲线；并应用流式细胞术测定细胞周期和表面标记物。结果MSCs体外培养生长状况良好，具有活跃的增殖能力，接种10h后贴壁率为96％以上；细胞周期显示有91．4％处于G0／Gl期；培养的MSCs阳性表达CD29、CD44，阴性表达CD34、CD45。结论在实验条件下，体外培养8代以前的MSCs生长稳定，增殖较快，细胞周期表现出较早期细胞特点，可作为组织工程的种子细胞。     

大鼠骨髓间质干细胞的分离培养及生物学特性研究

目的建立大鼠骨髓间质干细胞(MSCs)最佳的体外分离培养方法,并研究其基本的生物学特性。方法采用密度梯度离心和贴壁培养两种方法分离大鼠的MSCs,进行形态学观察及增殖生长方面的测定;免疫细胞化学染色鉴定表面标志。结果大鼠MSCs体外培养呈梭形;细胞生长曲线为“S”型;密度梯度离心法原代培养15d达到80%～90%的融合,而改良的直接贴壁法只需要5d;细胞周期显示G0/G1期88.29%;免疫细胞化学染色显示CD44表达阳性,CD34、CD45为阴性。结论两种方法均可获得骨髓间质干细胞,但贴壁培养法操作更简便、快速,具有对细胞活性影响较小,更利于其贴壁和增殖的优点。MSCs体外培养条件下生长性状稳定,适于做组织工程的种子细胞。     

兔骨髓间充质干细胞培养与多向分化潜能鉴定的实验研究

目的原代培养兔骨髓间充质干细胞(mesenchymal stem cells,MSCs),观察体外培养中MSCs的生物学特性及多向分化潜能。方法通过密度梯度离心联合贴壁培养法,体外分离、纯化、扩增兔骨髓间充质干细胞,观察形态学特点,测绘传代MSCs生长曲线,检测细胞周期及表面标记,体外诱导MSCs向成骨细胞、成脂肪细胞分化并鉴定。结果原代及传代MSCs为长梭形成纤维细胞样细胞;生长曲线显示传代细胞具有类似的生长规律;流式细胞仪分析MSCs CD44表达阳性,CD45表达阴性;细胞周期分析显示87%以上细胞处于G0/G1期;经成骨细胞诱导,细胞碱性磷酸酶染色阳性;经成脂肪细胞诱导,细胞内出现红染脂滴。结论通过密度梯度离心联合贴壁培养法可大量扩增、纯化MSCs,所获细胞具有高度自我更新和多向分化潜能。     

人骨髓间充质干细胞的分离培养及表型分析

目的体外分离培养人骨髓间充质干细胞(MSCs)并研究其生物学特性,为进一步实验研究打下基础.方法通过密度梯度离心法及贴壁培养分离纯化人骨髓中的单个核细胞、体外培养传代、倒置相差显微镜观察细胞生长情况、瑞氏染色及透射电镜观察细胞形态及结构、绘制生长曲线、流式细胞仪检测细胞表面标记及增殖周期、免疫细胞化学及细胞化学染色对分离培养细胞进行鉴定.结果原代和传代培养的细胞以成纤维样为主,有较强的生长增殖能力;流式细胞仪检测细胞表面标记:CD29、CD105阳性,CD34阴性;细胞周期分析:90%以上的细胞处于G0/G1期;细胞CD106、纤维连接蛋白表达阳性,CD45、CD14及层连蛋白、胶原蛋白Ⅱ表达阴性,细胞糖原(PAS)染色强阳性,细胞碱性磷酸酶(ALP)染色阴性.表明细胞不是造血细胞且未向成纤维细胞、成骨细胞、软骨细胞分化,而是处于未分化阶段的间充质干细胞.结论通过密度梯度离心法及贴壁传代培养可以分离纯化MSCs以满足下一步实验研究,该细胞具有特殊的生物学特性.     

大鼠骨髓间质干细胞体外培养扩增及生物学特性研究

[目的]建立从大鼠骨髓中分离大鼠骨髓间质干细胞(rat mesenchymal stemcells,r MSCs)和体外传代培养技术,并对r M-SCs的生物学特性进行研究。[方法]采用贴壁筛选法分离r MSCs,并通过不断传代进行纯化和扩增培养,绘制1、3、5代细胞生长曲线,用流式细胞仪检测其表面抗原,并比较在含不同浓度胎牛血清培养液培养后r MSCs的生长、增殖情况。[结果]r MSCs在体外培养扩增,原代可获得(5~6)×105、第5代可获得(2~3)×108个细胞。r MSCs形态呈长梭形,细胞生长曲线呈S形,流式细胞仪检测结果显示,r MSCs表面抗原CD90表达阳性,而CD45表达阴性。[结论]所建立的分离和培养方法获取的是r M-SCs,具有r MSCs生物学特性,是组织工程研究中良好的细胞来源。     

体外培养人骨髓间充质干细胞的生物学特性

目的体外分离培养人骨髓间充质干细胞(MSCs)并研究其一般的生物学特性.方法通过密度梯度离心法分离MSCs、体外培养传代细胞计数、流式细胞仪检测细胞增殖周期、表面分子测定以及细胞化学染色了解人MSCs一般的特点.结果人MSCs经过体外培养均一地表达CD29、CD44、CD166,而CD34、CD45阴性.细胞化学结果显示,细胞糖原(PAS)强阳性,脂肪(SB)为阴性,5%～10%细胞碱性磷酸酶(ALP)阳性.细胞周期分析表明:G0/G1、S和G2/M所占比例分别为83.11%、5.17%和11.72%.分离细胞在成骨诱导体系下进一步向成骨细胞分化.结论密度梯度离心法能够分离纯化MSCs有其特殊的生物学特点,能够向成骨细胞分化.     

成人骨髓间充质干细胞的体外诱导培养及向脂肪细胞的定向分化

目的：确定人骨髓的间充质干细胞(MSCs)体外培养扩增、培养，向脂肪细胞表型转化的方法，并了解其生物学特性变化。方法：用Percoll分离液(1．073g／ml)分离成人MSCs，传代培养。流式细胞仪检测表面标记物CDl4，CD34，CD45，CD44，VLA—1，HLA—DR和细胞周期，用1—甲基—3—异丁基—黄嘌吟、吲哚美辛、牛胰岛素、地塞米松实现向脂肪细胞的定向诱导分化。油红O染色，光镜下观察橙红色脂滴沉着的细胞比例。结果：分离培养获得贴壁细胞，流式细胞仪检测CDl4，CD34，CD45，HLA—DR阴性，CD44阳性，VLA—1表达微弱。G0／G1期细胞约为86％。诱导72h后出现脂墒，第3周油红O染色示85％以上细胞转变为脂肪细胞。结论：从人骨髓分离、体外诱导培养间充质干细胞，可定向促进向脂肪细胞表型转化。     

骨髓间充质干细胞的分离培养和生物学性状

目的建立一种体外分离纯化和培养扩增人骨髓间充质干细胞(mesenchymal stem cells,MSCs)的方法,并探讨其生物学特性,为MSCs的进一步应用研究提供数据.方法抽取人骨髓后用Percoll分离液经密度梯度离心法分离得到单个核细胞,以105个细胞/cm2密度接种,培养液为含10%胎牛血清的L-DMEM.倒置相差显微镜及吉姆萨-瑞氏染色观察其形态,MTT法测其生长曲线、流式细胞仪检测细胞周期及表面标记物.结果培养的MSCs 12h后换液,有部分细胞贴壁生长,4～5d可见有集落形成,14～20d左右可达到80%～90%融合,倒置相差显微镜及吉姆萨-瑞氏染色可见细胞形态为梭形、多角形及纺锤状等,生长曲线图显示MSCs增殖活跃,流式细胞仪检测显示约有86%的细胞处于G0、G1期,表面标记物中CD14、CD34、VLA-1、CD45和HLA-DR阴性,而CD44、CD105和CD29阳性.结论成功地建立了一种分离培养人骨髓MSCs的方法,获得的细胞形态多样、增殖稳定.     

应用全骨髓贴壁法获取高纯度大鼠骨髓间充质干细胞的实验研究

目的 探讨体外获取高纯度大鼠骨髓间充质干细胞的方法.方法 应用全骨髓贴壁法体外分离培养大鼠骨髓间充质干细胞,进行传代培养,倒置显微镜下观察细胞形态并测定其生长曲线,流式细胞术检测细胞周期,免疫细胞化学法鉴定细胞表面标志CD34、CD44及CD45.结果 获取的大鼠骨髓间充质干细胞形态呈均一成纤维细胞样,并呈集落样生长.细胞生长曲线示,在传代后的第4-5天细胞开始明显增殖,进入指数增生期.细胞周期显示81.49%P3代细胞为G0/C1期,经免疫细胞化学染色结果显示CD44阳性,CD34、CD45阴性.结论 体外应用全骨髓贴壁法可以分离培养出高纯度的大鼠骨髓间充质干细胞,而且此法简单易行、经济.     

犬骨髓间充质干细胞的分离、培养、纯化及鉴定

[目的]探讨分离、培养、纯化和鉴定犬骨髓间充质干细胞（mesenchymal stem cells,MSCs）方法,观察MSCs体外生长特征。[方法]自犬髂后上棘抽取骨髓约10ml,1．073g／ml的Percoll分离液梯度离心,培养皿培养、换液除去非贴壁细胞,获得MSCs,通过及时、反复传代对MSCs进行纯化和扩增培养,测定生长曲线,并进行形态学观察。流式细胞仪检测扩增后MSCs细胞周期及表面抗原特性。[结果]MSCs在含10％小牛血清的IMEM中生长性状相对稳定,1、3、5代细胞生长曲线基本一致,增殖速度快。流式细胞仪检测表明MSCs强表达干细胞标记CD44,而不表达造血干细胞特异抗原CD34、CD11a、CD14和HLA-DR。第2代（P2）末MSCs周期显示有82．4％的细胞处于G0／G1期。[结论]密度梯度离心结合贴壁培养法能有效分离、纯化和培养犬骨髓MSCs。     

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.     

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…     

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.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.