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.     

骨髓和脂肪源多潜能间充质干细胞的比较研究

①目的比较骨髓源间充质干细胞和脂肪源间充质干细胞的生物学特性。②方法分离人的骨髓源间充质干细胞和脂肪源间充质干细胞进行体外培养，通过绘制生长曲线，比较细胞的增殖能力；利用流式细胞仪分析细胞表型，并与诱导培养比较细胞的分化潜能进行比较。③结果脂肪源间充质干细胞与骨髓源间充质干细胞具有相当的生物学特性，且在增殖能力方面优于骨髓源间充质干细胞。④结论人脂肪组织可能成为一种新的间充质干细胞来源。     

骨髓间充质干细胞的分离、培养、鉴定及生物学特性研究

目的 通过体外细胞培养和贴壁筛选法将骨髓间充质干细胞由骨髓中分离纯化并加以鉴定，观察该细胞的生物学特性，为其用于组织工程提供实验基础。方法 提取骨髓，通过离心和贴壁筛选培养获取骨髓间充质干细胞，原位杂交检测骨髓间充质干细胞的表面标志CD44对培养细胞进行鉴定；测定其生长曲线和贴壁率。结果 通过体外培养和贴壁筛选可获得骨髓间充质干细胞，该细胞在体外培养条件下可在短时间内贴壁生长，增殖速度迅速，适应性强，长期传代不改变其生物学特性。结论 体外细胞培养和贴壁筛选能有效分离纯化免骨髓间充质干细胞，细胞扩增稳定。     

SD大鼠骨髓间充质干细胞体外分离培养的实验研究

目的 建立一种简便有效的体外分离纯化及培养扩增大鼠骨髓间充质干细胞(BMSCs)的方法,研究BMSCs的生物学特性,为后续细胞移植和基因治疗提供理想的种子细胞.方法 全骨髓贴壁培养法分离大鼠BMSCs,体外培养和连续传代,在倒置相差显微镜下连续观察细胞的形态变化,利用MTT法测定其生长曲线,流式细胞仪鉴定其表面抗原,成...     

兔外周血间充质干细胞生物学性状的研究

目的应用G—CSF动员骨髓干细胞后分离外周血间充质干细胞（MSCs）,并体外培养扩增然后进行鉴定。方法应用密度梯度离心法和贴壁培养法分离、培养兔外周血MSCs,并用显微镜观察细胞形态,测定细胞的生长曲线并用流式细胞仪鉴定。结果@MSCs于体外培养2h开始贴壁生长,细胞形态为梭形、多角形及纺锤状等。传代MSCs变为形态均一、排列有序的长梭形细胞,增殖活跃,细胞平均倍增时间为30h;②流式细胞仪检测MSCs表面抗原CD34、CD45呈阴性表达,CD44呈阳性表达。结论采用密度梯度离心法和贴壁法可以有效获得应用G—CSF动员后的外周血MSCs,且细胞纯度高,生长增殖活性好。     

人骨髓间充质干细胞分离培养及多向分化的实验研究

目的:探索体外分离子与培养人骨髓间充质干细胞的方法,同时研究其细胞生物学特性,分析其作为骨组织工程种子细胞的可行性。方法:分离人骨髓间充质干细胞(human bone marrow mesenchymal stemcells,hBMSCs),通过常规培养,在体外观察其生长特性、抗原表达等特征;然后通过条件培养基定向诱导,观察其分化潜能。结果:人骨髓间充质干细胞在体外可以大量增殖,常规培养条件下,原代培养需要2～3周,转代后生长速度加快;应用流式细胞仪检测MSCs的表面抗原,CD44、CD29、CD105阳性,CD45、CD06、CD34以及HLA-DR阴性;在相应条件培养基的诱导作用下,MSCs可以分化为成骨细胞、软骨细胞以及神经细胞。结论:人骨髓间充质干细胞可以从骨髓中分离并在体外培养增殖,同时在体外具有多向分化潜能,可以分化成为骨细胞,符合骨组织工程种子细胞的要求。     

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.     

人脐带间充质干细胞生物学特性及向成骨细胞分化的研究

目的:体外分离、纯化及培养人脐带间充质干细胞(WJ～MSCs),观察其生物学特性并研究其定向分化成成骨细胞的能力。方法:将剔除动静脉的新鲜人脐带组织切成小段,剥离血管后酶解,释放细胞贴壁生长,倒置显微镜观察细胞形态,绘制第3代生长曲线;流式细胞仪测定细胞表面标记(CD105、CD73、CD90、CD34、CD45、CD14和HLA～DR);化学染色检测其体外诱导成骨分化的能力。结果:原代人脐带间充质干细胞呈现典型的成纤维样形态;流式细胞仪检测培养细胞间充质干细胞的表面标志CD105、CD73和CD90阳性表达,但不表达造血细胞的表面标志CD34、CD45、CD14及HLA-DR阴性表达,HLA-ABC低表达。体外诱导实验证实,该细胞具有成骨分化能力。结论:WJ-MSCs体外诱导成骨能力确切,具有类似骨髓间充质干细胞的特异性表面标记,且具有同种异体移植的低免疫原性。     

人脐血间充质干细胞的改良分离培养

目的探讨人间脐血来源的充质干细胞在体外分离培养与扩增的方法。方法用重力离心-密度梯度离心法结合贴壁筛选法分离细胞,用含15%FBS的DMEM低糖培养基培养并传代,流式细胞仪检测P3代间充质干细胞的表面标志。结果脐血来源的单个核细胞24 h即开始贴壁,主要表现为破骨样细胞和间充质样细胞。经自然纯化法传代后,可得到形态单一的长梭形间充质干细胞。流式细胞仪检测结果显示该细胞表达CD44。结论脐血来源的MSCs可以在体外分离培养和扩增,细胞表面标记与骨髓来源间充质干细胞一致。     

不同传代倍数骨髓间充质干细胞诱导成脂能力的观察

目的：探讨不同传代倍数骨髓间充质干细胞诱导成脂的能力。方法：应用percoll法结合贴壁培养法分离培养骨髓MSCs,流式细胞仪法检测其特异性表面标志物,培养体系中加入1μmol／L地塞米松、0．5mmol/LIBMX、5mg／L人胰岛素,100μmol／L吲哚美辛,如此连续培养10代,油红O染色观察其成脂能力。结果：培养的MSCs在倒置相差显微镜下显示了间充质干细胞的形态特性,流式细胞仪检测证实为MSCs,第3代细胞在诱导21天后成脂能力最强。结论：作为组织工程的种子细胞。骨髓间充质干细胞体外培养不宜超过7代。     

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.     

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.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.