补骨合剂对体外培养骨髓基质细胞分化影响的观察

观察不同浓度的补骨合剂对体外培养骨髓基质细胞(MSC)分化的影响，探讨补骨合剂促进MSC分化的作用机理。检测不同浓度的补骨合剂对MSC分化过程中碱性磷酸酶(ALP)比活性和细胞内骨钙素(BGP)含量的影响，以及观察ALP和矿化结节染色情况，并与密钙息作对照。结果发现：补骨合剂有促进分化中的MSC分泌ALP、BGP的作用，从而加速MSC向成骨细胞分化，其作用原理与密钙息作用原理基本相同。     

猪骨髓间充质干细胞成骨分化后白细胞表面抗原的表达及意义

目的：研究猪骨髓间充质干细胞（MSC）成骨分化（DOC）后在干扰素-γ（IFN-γ）刺激下对猪白细胞表面抗原（SEA）的变化及外周血单个核细胞（PBMC）增殖的影响，了解其免疫原性。方法：以未分化的MSC为对照，采用流式细胞术分别检测未诱导、成骨诱导的MSC、MSC＋IFN-γ、DOC＋IFN-γ的SLA分子的表达，采用单向混合淋巴反应观察各组细胞对外源凝集素（PHA）刺激PBMC的每分钟脉冲值（CPM）变化。结果：MSC＋IFN-1组和DOC＋IFN-1组SLA—Ⅰ表达上调（P〈0．05），SLA—Ⅱ表达明显上调（P〈0．01）。MSC成骨分化后能抑制PHA刺激的PBMC增殖反应。结论：在体外实验中，DOC后的MSC在IFN-γ刺激下仍具有低免疫原性，且具有免疫调节作用。     

骨松灵合剂对去卵巢大鼠成骨细胞增殖及Ⅰ型胶原雌激素受体表达的影响

目的通过观察骨松灵合剂对去卵巢大鼠成骨细胞增殖及Ⅰ型胶原、雌激素受体表达的影响,探讨骨松灵合剂对骨代谢的可能作用机制。方法不同浓度的骨松灵合剂刺激大鼠成骨细胞,采用噻唑蓝(MTT)法测定活细胞的数量,RT-PCR和免疫细胞化学染色方法来测定不同浓度的骨松灵合剂对去卵巢大鼠成骨细胞Ⅰ型胶原、雌激素受体表达的影响。结果与对照组相比,30,60,120,240mg/ml的骨松灵合剂对成骨细胞均有促增殖作用(P<0.05),48h、72h后,120mg/ml的骨松灵合剂仍有此作用,其他浓度对成骨细胞促增殖作用消失(P>0.05)。120mg/ml骨松灵合剂培养成骨细胞24h、48h、72h后均可增加成骨细胞Ⅰ型胶原mRNA表达,并有时间依赖性。120mg/ml骨松灵合剂培养成骨细胞24h、48h、72h后均可增加成骨细胞ERαmRNA,ERβmRNA表达,ERαmRNA表达在培养24 h后有所增加,48h、72h较24 h无明显变化;ERβmRNA表达增加有时间依赖性。结论骨松灵合剂可以促进去卵巢大鼠成骨细胞增殖及Ⅰ型胶原、雌激素受体表达,这些可能是骨松灵合剂对骨形成的作用机制。     

兔骨髓间充质干细胞分离培养及向成骨细胞表型的诱导分化

目的观察兔骨髓间充质干细胞(MSC)体外培养增殖的生长特征及体外诱导条件下的成骨能力情况.方法抽取兔髂骨及胫骨的骨髓液,经密度梯度离心分离出MSC,用塑料培养板贴壁培养进一步纯化MSC,并培养增殖.观察MSC的生长特征,测定其生长曲线及贴壁率.对第2代MSC进行成骨矿化诱导,测定其碱性磷酸酶(ALP)活性及成骨矿化情况.结果MSC为贴壁生长,以均一的梭形的成纤维细胞样生长,增殖能力强.在成骨诱导剂作用下,MSC具有成骨能力,诱导后ALP活性明显提高,并且出现矿化结节.结论获得的兔骨髓MSC生长增殖旺盛,分离培养MSC是可行的,且MSC具成骨分化潜能.     

在高糖条件下锰超氧化物歧化酶刺激MSC提高血管内皮细胞活性的研究

目的观察高糖环境下,锰超氧化物歧化酶（MnSOD）刺激间充质干细胞（MSC）上清液对人脐静脉血管内皮细胞（HUVEC）增殖和趋化能力的影响。方法高糖MSC培养基条件下,100μg／LMnSOD刺激的MSC为实验组,未刺激的MSC为对照组,添加Akt阻断剂5μmol／L.Tricirlbine为Akt阻断剂组,利用各组条件培养基在高糖1640培养基条件下,培养人脐静脉内皮细胞（HUVEC）,使用MTr法观察各条件培养基对HUVEC增殖的影响,并利用细胞划痕实验和Transwell细胞迁移实验对HUVEC的趋化情况进行评估。结果与对照组相比,MSC实验组条件培养基促进HUVEC增殖;但是Akt阻断剂组HUVEC增殖能力降低;MSC实验组条件培养基作用的HUVEC趋化活动与对照组相比明显提高,但MSC实验组HUVEC趋化活动在Akt阻断剂组明显被抑制;MSC实验组条件培养基中VEGF含量比对照组明显提高。结论高糖条件下MnSOD可以通过刺激间充质干细胞旁分泌VEGF等细胞因子对血管内皮细胞增殖、趋化等能力产生影响。     

野生型Smad3基因促进大鼠骨髓间充质干细胞成骨分化的实验研究

目的　探讨野生型Smad3基因对大鼠骨髓间充质干细胞 (MSC)增殖和成骨分化的影响以及作用机理。方法　脂质体介导稳定转染Smad3和Smad3△C ,间接免疫荧光试验鉴定 ;采用噻唑蓝 (MTT)检测Smad3转染对MSC增殖的影响 ;采用逆转录聚合酶链反应检测转染细胞中ALP和核心结合因子 (cbfa1)mRNA的表达 ,用对硝基苯磷酸盐 (PNP)法检测细胞ALP活性 ,用茜素红染色法检测细胞矿化能力 ,观察Smad3对MSC成骨分化的影响 ;用PD980 5 9选择性阻断非细胞外信号调节激酶(ERK)通路 ,观察ERK通路在Smad3调节MSC成骨分化中的作用。结果　稳定转染Smad3和Smad3△C的细胞中c Myc抗原阳性表达 ;Smad3 MSC增殖缓慢 ,细胞群体倍增时间延长 ,没有明显的对数生长期 ;Smad3 MSC中ALP和cbfa1mRNA的表达水平、ALP活性以及矿化能力明显高于Smad3△C MSC与V MSC ;加入PD980 5 9后 ,Smad3 MSC中ALP活性以及矿化能力有所减低 ,但与未加入PD980 5 9组相比 ,差异无显著意义 (P >0 0 5 )。结论　野生型Smad3基因抑制MSC的增殖 ,并通过非ERK通路促进MSC向成骨分化和成熟 ,是促进骨形成的重要成分。     

恒磁场对成人骨髓间充质干细胞增殖及细胞周期的影响

目的：观察不同强度恒磁场辐射对成人骨髓间充质干细胞(mesenchymal stemce Hs，MSC)增殖水平及细胞周期的影响。方法：用密度梯度离心法分离成人MSC，再经贴壁筛选法筛选，对生长良好的第3代成人MSC进行恒磁场辐射(强度分别为0．05、0．10、0．50和1．00mT)，连续刺激5天(每天8h)后，用单四唑(MTT)法、流式细胞仪法测定细胞增殖、细胞周期和细胞凋亡情况。结果：0．05mT组细胞增殖显著高于对照组；0．10mT组细胞增殖与对照组相比无明显差异；其余剂量组细胞增殖均显著低于对照组。各组均未发现DNA倍体异常细胞。结论：恒磁场对成人MSC增殖的影响与磁感应强度有关，0．05mT的磁场促进MSC的增殖，0．10mT的磁场对MSC无明显影响，0．50mT和1．00mT的磁场抑制MSC的增殖。     

刺五加注射液对骨髓间充质干细胞增殖的影响

目的探讨刺五加注射液对大鼠骨髓间充质干细胞（MSC）增殖的影响。方法体外培养MSC，用四甲基偶氮唑法检测刺五加注射液促进大鼠MSC增殖的作用；用免疫组化法检测MSC细胞的Brdu标记阳性率。结果4种浓度的药液对MSC的增殖作用与对照组比较有显著性差异（P〈0．05）。结论刺五加注射液有促进MSC增殖的作用。     

补骨合剂对全反式维甲酸诱导的骨髓基质细胞凋亡的保护作用

目的:应用体外培养骨髓基质细胞,在细胞和分子水平观察补骨合剂对细胞凋亡的影响,探讨补骨合剂治疗骨质疏松症的机制.方法:分离SD大鼠骨髓基质细胞,通过形态学方法和流式细胞术检测凋亡细胞周期和线粒体膜电位改变以及Bcl 2、Bax蛋白基因表达,对补骨合剂在细胞凋亡过程中的作用进行评价.结果:补骨合剂的早期应用可以使阻滞于G0/G1期的细胞减少,进入S期进行DNA合成的细胞增多;诱导凋亡的细胞在补骨合剂组Bcl 2表达明显高于全反式维甲酸(all-trans retinoic acid,ATRA)诱导组,而Bax表达明显低于ATRA诱导组,且补骨合剂组线粒体的膜电位下降均显著低于ATRA诱导组.结论:补骨合剂治疗骨质疏松症的机制是补骨合剂的早期应用可以使ATRA诱导的凋亡细胞减少,从而促进细胞有丝分裂,抑制细胞凋亡;对骨髓基质细胞线粒体膜上的Bcl-2具有保护作用,同时通过阻止Bax从胞浆中移至线粒体膜上而使Bcl-2在与Bax形成的同源二聚体中占据优势来阻止线粒体膜上的通透性转换孔道开放,从而阻止线粒体释放凋亡诱导因子造成的线粒体膜电位改变和生物合成的破坏,达到抑制凋亡的目的.     

抗肿瘤药物依托泊苷促进间充质干细胞成骨分化的研究

目的·研究抗肿瘤药物依托泊苷对间充质干细胞(mesenchymal stem cell,MSC)成骨分化的促进作用及可能的机制.方法·体外分离C57BL/6J小鼠骨髓和人骨髓来源MSC.给予小鼠MSC不同浓度(0～12.50 μmol/L)的依托泊苷12、24、36、48和60h后,采用CCK-8法检测MSC的增殖活性...     

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.