阿仑膦酸钠对骨髓间充质干细胞骨向诱导的实验研究

目的探讨阿仑膦酸钠(ALN)对骨髓间充质干细胞(BMSCs)增殖和骨向分化能力的影响,观察其促BMSCs骨向分化过程中对转化生长因子β1(TGF-β1)及骨形成蛋白-2(BMP-2)表达的影响,分析可能的作用途径。方法以碱性磷酸酶(ALP)等指标确定干预药物不同浓度梯度中最佳促BMSCs骨向分化剂量;分组实验,通过检测诱导分化过程中ALP和钙化结节等指标的表达,观察其对BMSCs骨向分化能力的影响;ELISA法检测骨向分化过程中TGF-β1、BMP-2的表达。结果 ALN最佳促BMSCs增殖和骨向分化浓度为1×10-8mol/L,该浓度ALN能促进成骨指标的表达和TGF-β1和BMP-2分泌增加;具有促BMSCs骨向分化能力的ALN各诱导组均伴随TGF-β1和BMP-2分泌增加。结论 ALN能促进BMSCs增殖和骨向分化;在BMSCs骨向分化过程中,上调TGF-β1、BMP-2的表达量可能是各干预药物促进MSCs骨向分化的作用机制之一。     

5-氮杂胞苷对大鼠骨髓间充质干细胞体外增殖及成肌分化的影响

[目的]观察5-氮杂胞苷(5-Aza)对大鼠骨髓间充质干细胞(MSCs)体外增殖和成肌分化的影响.[方法]无菌条件下取SD大鼠骨髓组织,采用密度梯度离心法分离大鼠MSCs,传3代后的MSCs采用双标免疫组化法鉴定后,随机分为4组:浓度为5、10、15μmol/L的5-Aza组和空白对照组,采用四甲基偶氮唑盐(MTT)法检测不同浓度5-Aza对MSCs生长增殖的影响;以含5、10、20μmol/L5-Aza的培养基诱导培养MSCs 24 h后,改用完全培养基继续培养,采用免疫组织染色法鉴定5-Aza诱导分化3、7、14d后细胞肌分化相关蛋白肌凝蛋白(myosin)和结蛋白(desmin)的表达情况.[结果]双标免疫组化染色结果显示:所培养细胞同时表达Brdu和CD44、CD54,表达率达96%,鉴定结果表明所培养细胞为MSCs;5、10μmol/L5-Aza对MSCs增殖无显著影响(P>0.05),15μmol/L5-Aza可显著抑制MSCs生长(P<0.05);不同浓度5-Aza诱导培养MSCs后第3天,部分细胞出现desmin阳性表达,诱导后14 d,部分细胞表达myosin,以10μmol/L5-Aza组作用为佳.[结论]高浓度5-Aza可抑制MSCs体外增殖;适宜浓度的5-Aza可诱导MSCs向成肌细胞定向分化.     

成骨生长肽对大鼠骨髓基质细胞增殖分化的影响

目的 研究成骨生长肽(osteogenic growth peptide, OGP)在体外对骨髓基质细胞增殖和成骨向分化的影响.方法 在体外培养的大鼠骨髓基质细胞中加入不同浓度的OGP(10-11～10-7 mol/L),用MTT法检测细胞增殖,酶联免疫法检测细胞内碱性磷酸酶(ALP)的表达,RT-PCR法检测细胞内核心结合因子1(Cbfa1) mRNA的表达.结果 OGP对骨髓基质细胞增殖有促进作用(P《0.05),最大效应浓度为10-9 mol/L;能增加细胞内ALP活性(P《0.05),最大效应浓度为10-8 mol/L;可诱导Cbfa1 mRNA的表达(P《0.05).结论 OGP可促进骨髓基质细胞的增殖,并通过诱导其内Cbfa1 mRNA的表达促进其成骨向的分化.     

大黄素和rhTGF-β1联合诱导人骨髓间充质干细胞向成骨细胞分化

目的探讨不同的方法对人骨髓间充质干细胞向成骨细胞方向分化的影响。方法采用不同方法诱导第三代人骨髓MSCs向成骨细胞分化,对照组:采用基础诱导培养液:地塞米松(10~(-8) mol/L)、β-甘油磷酸钠(10 mmol/L)、L-抗坏血酸(50μg/L);大黄素组:基础诱导培养+大黄素(10~(-6) mol/L);大黄素rhTGF-β1组:基础诱导培养液+大黄素(10~(-6) mol/L)+重组人转化生长因子-β1(recombinant human transforming growth factor-betal,rhTGF-β1)5 ng/ml。结果大黄素和rhTGF-β1对人骨髓MSCs增殖的影响:对照组和大黄素组与大黄素+rhTGF-β1组比较均具有显著差异(P0.05)。大黄素和rhTGF-β1对人骨髓MSCs分化的影响:对照组、大黄素组与大黄素+rhTGF-β1组比较均具有显著差异(P0.01)。结论基础诱导培养液加rhTGF-β1 5 ng/ml和大黄素(10~(-6) mol/L是理想的具有临床实用价值的成人骨髓MSC体外诱导为成骨细胞的培养体系。     

不同浓度人源性抗菌肽LL-37/PLGA/β-TCP复合支架对兔骨髓间充质干细胞增殖、分化的影响

目的:研究不同浓度人源性抗菌肽LL-37/聚乳酸聚乙醇酸共聚物(PLGA)/β-磷酸三钙(β-TCP)复合支架对于兔骨髓间充质干细胞(rBMSCs)增殖、分化的影响。方法:制备LL-37/PLGA/β-TCP复合支架材料,按LL-37浓度分为0、1、5、10 μmol/L组,另设置空白rBMSCs培养基为N组,每组三个培养皿,细胞密度为5×10~5个/皿。扫描电镜下观察不同浓度LL-37/PLGA/β-TCP复合支架形态。采用CCK-8检查方法检测各组干预rBMSCs 0、24、48、72、96、120 h后rBMSCs细胞增殖活力。干预rBMSCs 24 h后,采用荧光定量聚合酶链反应(qPCR)检测各组成骨相关基因碱性磷酸酶(ALP)、骨形态发生蛋白-1(BMP-1)及骨形态发生蛋白-7(BMP-7)的mRNA相对表达量。干预rBMSCs 24 h后,采用ELISA检测各组ALP、BMP-1及BMP-7的蛋白水平。每个实验独立重复三次。结果:LL-37/PLGA/β-TCP复合支架材料随着LL-37浓度增加而呈现多孔、细胞吸附增多的趋势,促进细胞贴附生长。干预24 h后,10 μmol/L组细胞增殖能力明显高于N组(P0.05);随着干预时间延长,1、5、10 μmol/L组均对rBMSCs有促进增殖作用,且呈浓度依赖作用。1、5、10 μmol/L组ALP、BMP-1及BMP-7的mRNA相对表达量与蛋白表达水平均高于N组(P0.05);1、5、10 μmol/L组ALP、BMP-1及BMP-7的mRNA相对表达量与蛋白表达水平均呈高表达,且呈浓度依赖。结论:LL-37/PLGA/β-TCP复合支架可以显著促进rBMSCs增殖与分化,是一种潜在的骨组织工程支架。     

甲基强的松龙对SD大鼠骨髓间充质干细胞的生物学特性的影响

目的 观察不同浓度的甲基强的松龙(甲强龙)对体外培养的大鼠骨髓间充质干细胞(MSCs)的生物学特性的影响.方法 全骨髓培养法获得MSCs,通过表面抗原和多能分化能力鉴定.不同浓度的甲强龙分别处理MSCs,流式细胞仪分析各组细胞的凋亡率;MTS/PMS法检测各组细胞的增殖率;不同浓度的甲强龙加抗坏血酸和β-甘油磷酸诱导MSCs成骨分化,茜素红染色(AR-S)、ALP染色检测各组细胞的成骨分化能力.结果 10-6mol/L及以上浓度的甲强龙可明显促进MSCs的凋亡(P＜0.01)并明显抑制MSCs的增殖(P＜0.01),10-7 mol/L及以下浓度的甲强龙对MSCs的凋亡率和增殖抑制作用的影响与对照组差别没有统计学意义(P＞0.05);10-7及10-6mol/L甲强龙加抗坏血酸和β-甘油磷酸组茜素红染色和ALP染色阳性,10-R及10-5mol/L组茜素红染色和ALP染色阴性.结论 高浓度的甲强龙(10-6mol/L及以上)能抑制MSCs的增殖并促进凋亡,而低浓度的与对照组差别不大.适当浓度(10-7及10-6mol/L)的甲强龙可以诱导MSCs的成骨分化,而过高或过低浓度(10-8及10-5mol/L)的甲强龙则没有这种作用.     

淫羊藿苷对大鼠成骨细胞核结合因子α1、骨形成蛋白-2、骨形成蛋白-4 mRNA表达的影响

目的:研究淫羊藿苷对成骨细胞增殖、分化以及对核心结合因子α1(Cbfαl)、骨形成蛋白-2(BMP2)、骨形成蛋白-4(BMP4)mRNA表达的影响.方法:以酶序列消化法从新生大鼠颅骨分离、培养成骨细胞,采用碱性磷酸酶染色和钙结节茜素红染色法鉴定细胞.取第3-5代细胞,用CCK-8法检测经0 mol/L、10~(-8)mol/L、10~(-7)mol/L、10~(-6)mol/L、10~(-5)mol/L、10~(-4)mol/L的淫羊藿苷处理24、48、72 h后成骨细胞的增殖情况.分别用流式细胞技术和对硝基苯酚法检测上述各浓度的淫羊藿苷处理48 h后成骨细胞的增殖指数和碱性磷酸酶(ALP)活性.用real-timePCR法检测10～(-6)mol/L淫羊藿苷处理48 h后成骨细胞Cbfα1、BMP2和BMP4 mRNA表达的改变.结果:10~(-8)～10~(-4)moL/L的淫羊藿苷对成骨细胞均无增殖促进作用,但可促进成骨细胞的ALP活性;10~(-6)mol/L淫羊藿苷可以上调成骨细胞Cbfα1、BMP2和BMP4 mRNA的表达.结论:淫羊藿苷可能是通过上调Cbfα1、BMP2和BMP4 mRNA的表达而促进成骨细胞的分化.     

地塞米松诱导促进BMP-2基因转染的兔MSCs的成骨转化

目的: 研究地塞米松诱导对BMP-2基因修饰的rMSCs的增殖和分化表型的影响.方法: 将地塞米松诱导和未经诱导的兔MSCs分别转导BMP-2基因后,以RT-PCR和免疫组化方法检测转导后细胞BMP-2的表达;通过观察细胞生长及碱性磷酸酶活性和骨钙素含量的测定,分析地塞米松诱导对BMP-2基因修饰的rMSCs的增殖和分化表型的影响.结果: 转导后BMP-2基因在两组rMSCs中均有表达,定量分析显示诱导组细胞碱性磷酸酶活性(134.36±8.84) nkat/L较对照组(104.02±7.83) nkat/L明显增高;诱导组细胞骨钙素含量(14.68±0.73) μg/L较对照组(6.52±1.21) μg/L明显增高.结论: 转导前地塞米松诱导能够促进BMP-2基因修饰的rMSCs的增殖和成骨转化.     

葛根素对成骨细胞体外增殖及Wnt/β-catenin信号通路表达的影响

目的:葛根素对成骨细胞体外增殖及Wnt/β-catenin信号通路表达的影响。方法:培养成骨细胞MC3T3-E1并分为对照组及10-6 mol/L PUE组、10~(-7) mol/L PUE组、10~(-8) mol/L PUE组,处理24小时后检测成骨细胞标志基因、凋亡基因、Wnt/β-catenin通路基因的mRNA表达量。结果:10-6 mol/L PUE组、10~(-7) mol/L PUE组、10~(-8) mol/L PUE组细胞ALP、Runx2、OC。Wnt1、Wnt2、Wnt3a、Wnt10b、β-catenin的mRNA表达量均显著高于对照组,caspase-3、caspase-8、caspase-9、caspase-12的mRNA表达量均显著低于对照组(P<0.05);且葛根素剂量越大,细胞中ALP、Runx2、OC、Wnt1、Wnt2、Wnt3a、Wnt10b、β-catenin的mRNA表达量越高,caspase-3、caspase-8、caspase-9、caspase-12的mRNA表达量越低(P<0.05)。结论:葛根素能够有效促进成骨细胞的增殖及Wnt/β-catenin通路的活化。     

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.