二烯丙基二硫诱导HL-60细胞系凋亡及其与Caspase-3的关系

目的研究二烯丙基二硫（DADS）诱导白血病细胞凋亡及其机制。方法实验分对照组、DADS处理组、Ae—DEVD—CHO预处理组，进行体外细胞培养，采用形态学观察、MTT法、流式细胞术、DNA凝胶电泳等方法，进行细胞形态学观察、细胞增殖抑制作用研究，检测细胞凋亡率、Caspase-3活性以及DNALadder检测。结果DADS诱导前后，HL-60细胞形态学发生明显改变，DADS以剂量依赖的方式抑制细胞的生长，在DADS诱导HL-60细胞凋亡过程中有Caspase-3的活化，且与剂量和作用时间呈依赖关系，Caspase-3抑制剂Ac—DEVD—CHO能抑制DADS诱导HL-60细胞凋亡。结论DADS能有效地诱导HL-60细胞凋亡，其过程与Caspase-3活化相关。     

正常骨髓基质细胞促进ATRA分化HL-60细胞的研究

目的 研究正常骨髓基质细胞(BMSCs)对全反式维甲酸(ATRA)诱导分化HL-60细胞的影响及其可能机制.方法 体外分离培养BMSCs,与HL-60细胞共培养.ATRA诱导悬浮的HL-60细胞分化,检测甲基蓝四氮唑(NBT)还原率,流式细胞仪测定CD11b、CD33抗原表达.结果 BMSCs与HL-60细胞共培养体系中,悬浮的HL-60细胞NBT还原率由原单独ATRA诱导分化的(84.36±4.22)%升高到(93.23±2.66)%(P＜0.05);CD11b表达由(65.97±3.18)%增至(90.54±0.97)%(P＜0.01);CD33表达由(78.79±0.83)%降至(52.25±2.21)%(P＜0.01).而基质细胞条件培养液(SCM)共培养体系中以上指标的差异均无统计学意义(P＞0.05).结论 BMSCs增强ATRA对HL-60细胞的诱导分化作用,并非通过分泌可溶性细胞因子,而可能是通过BMSCs与HL-60细胞间的相互作用,从而起到促进作用.     

盐酸小檗碱对HL-60细胞的诱导分化及其作用机制

目的：研究盐酸小檗碱对人早幼粒白血病HL-60细胞诱导分化的作用履其分子机制。方法：HL-60细胞经盐酸小檗碱处理后，观察细胞形态学变化，以及细胞NBT还原能力的改变，用流式细胞仪测定细胞增殖周期、CD11b、C-myc、C-fos表达。结果：盐酸小檗碱作用于HL-60细胞后，形态学观察显示分化细胞的特征；NBT还原能力增强；CD11b表达升高；细胞被阻滞于G0／G1期，S期细胞数明显减少；C-myc基因表达减弱，C-fos基因表达增强。结论：盐酸小檗碱可诱导HL-60细胞分化戍熟，其机制可能是通过调控与HL-60细胞增殖、分化相关基因表达，抑制DNA合成，从而抑制细胞增殖，诱导细胞分化。     

DADS活化HL-60细胞G2/M检查点与cyclinB1亚细胞分布的关系

目的研究二烯丙基二硫（DADS）诱导人急性髓性白血病细胞系HL-60细胞G2/M期生长阻滞的分子机制。方法采用MTT法检测DADS对细胞增殖活性的影响、流式细胞术检定细胞增殖周期、蛋白印迹法检测细胞内cyclinB1表达水平。结果DADS呈浓度依赖性抑制HL-60细胞增殖活性，且DADS（20μmol／L）与ATRA（10^-6mol／L）对HL-60细胞增殖活性影响相近（P〈0．01），DADS（20μmol／L）作用12h后能引起G2，M期细胞百分数增高并达到最大值，上调cyclinBl的表达水平并诱导cyclinB1细胞质定位。结论DADS能启动HL-60细胞G2/M检查点，它的激活与cyclinB1细胞质定位有关。     

蟾蜍灵增强全反式维甲酸对 NB4细胞的诱导分化作用

目的研究蟾蜍灵与全反式维甲酸(ATRA)联合对急性早幼粒细胞白血病(APL)细胞株NB4细胞的诱导分化作用。方法细胞存活率测定采用锥虫蓝拒染法,诱导分化采用形态学分析、四唑氮蓝(NBT)还原试验及细胞分化抗原CD11b的流式细胞仪解析。结果蟾蜍灵5 nmol/L与ATRA30 nmol/L联合明显诱导NB4细胞向成熟粒细胞分化、联合应用较单独应用ATRA时NBT还原率增加了59.7%及CD11b表达增加了22.4%。结论蟾蜍灵与ATRA联合应用可显著增强ATRA对NB4细胞的诱导分化作用。     

丹参酮ⅡA与全反式维甲酸协同诱导急性早幼粒细胞白血病细胞株的分化和凋亡

目的研究丹参酮ⅡA(Tanshinone ⅡA, TanⅡA)联合全反式维甲酸(ATRA)对早幼粒细胞白血病细胞(NB4)诱导分化及凋亡的协同效应.方法0.5 μg/ml TanⅡA分别联合0.5 μg/ml、0.25 μg/ml和0.125 μg/ml ATRA作用NB4细胞5 d,观察NB4细胞形态学变化,检测硝基蓝四氮唑(NBT)还原能力;流式细胞术检测CD11b,CD33的表达,并进行细胞周期和细胞凋亡分析.结果TanⅡA联合ATRA可协同诱导NB4细胞分化和凋亡.联合作用组第5 d细胞生长抑制率均超过80%;90%左右的NB4细胞分化,其中杆状和分叶核细胞比例超过65%;NBT还原能力显著升高.流式细胞术分析显示CD11b表达升高,CD33表达降低;G0/G1期细胞增加,有明显的细胞凋亡,与TanⅡA或ATRA单独作用组相比均有显著性差异(P<0.01).TanⅡA与ATRA(0.125 μg/ml～0.5 μg/ml)联合对NB4细胞的影响没有明显的浓度依赖倾向.结论TanⅡA联合ATRA对NB4细胞诱导分化和凋亡有协同作用;在ATRA一定浓度范围内,这种协同作用无ATRA剂量依赖性.     

大蒜油诱导HL-60细胞分化的实验研究

目的：观察大蒜油对HL-60细胞的诱导分化作用。方法：MTT法检测大蒜油对HL-60细胞的增殖抑制,Giemsa染色观察细胞形态改变,流式细胞术分析细胞周期改变,并检测CD11b、CD15的表达。RT-PCR检测bcl-2、c-myc／mad、mpo基因mRNA的表达。同时设ATRA、As2O3为阳性对照,与大蒜油的作用进行比较分析。结果：大蒜油明显抑制了HL-60细胞增殖,使大部分细胞阻滞于G0／G1期,作用强于ATRA和As2O3;诱导细胞成熟分化的能力与ATRA接近,优于As2O3;通过抑制bcl-2、c-mvc和mpo基因的表达,促进mad基因的表达来发挥作用。结论：大蒜油对HL-60细胞有明显的增殖抑制和诱导分化作用,有可能成为新的临床诱导分化剂。     

丹参酮A与全反式维甲酸协同诱导急性早幼粒细胞白血病细胞株的分化和凋亡

目的　研究丹参酮 A(Tanshinone A,Tan A)联合全反式维甲酸 (ATRA)对早幼粒细胞白血病细胞 (NB4 )诱导分化及凋亡的协同效应。方法　 0 .5 μg/ m l Tan A分别联合 0 .5 μg/ ml、0 .2 5 μg/ ml和 0 .12 5 μg/ml ATRA作用 NB4细胞 5 d,观察 NB4细胞形态学变化 ,检测硝基蓝四氮唑 (NBT)还原能力 ;流式细胞术检测CD11b,CD33的表达 ,并进行细胞周期和细胞凋亡分析。结果　 Tan A联合 ATRA可协同诱导 NB4细胞分化和凋亡。联合作用组第 5 d细胞生长抑制率均超过 80 % ;90 %左右的 NB4细胞分化 ,其中杆状和分叶核细胞比例超过6 5 % ;NBT还原能力显著升高。流式细胞术分析显示 CD11b表达升高 ,CD33表达降低 ;G0 / G1 期细胞增加 ,有明显的细胞凋亡 ,与 Tan A或 ATRA单独作用组相比均有显著性差异 (P<0 .0 1)。Tan A与 ATRA(0 .12 5 μg/ m l～0 .5 μg/ m l)联合对 NB4细胞的影响没有明显的浓度依赖倾向。结论　 Tan A联合 ATRA对 NB4细胞诱导分化和凋亡有协同作用 ;在 ATRA一定浓度范围内 ,这种协同作用无 ATRA剂量依赖性。     

JAK／STAT 途径活化与白血病细胞增殖之间的关系

目的：探讨JAK／STAT途径活化与白血病HL－60细胞增殖的相关性。方法分别利用二烯丙基二硫（ DADS）、ATRA、AG490处理体外培养的HL－60细胞,检测给药前后抗原CD11b分化能力、NBT还原能力;Western blot法检测JAK／STAT家族中与DADS诱导增殖相关的蛋白表达情况;免疫组化法检测转录因子c－jun、c－fos、c－myc、STAT的蛋白表达水平。结果 DADS可显著提高HL－60细胞分化能力;随着DADS浓度增加, NBT还原能力下降,且低于ATRA、AG490处理组;经不同浓度DADS处理, HL－60细胞中JAK／STAT家族成员JAK1／STAT3磷酸化水平随DADS浓度升高而降低;经免疫组化分析显示,STAT3、c－myc的蛋白水平受DADS抑制,而c－fos、c－jun的蛋白则可受DADS作用表达升高。结论 DADS通过激活JAK／STAT信号通路抑制白血病HL－60细胞增殖。     

rhIL-3、rhIFN-γ、DMSO单用或合用对HL-60细胞的增殖与分化的影响

作者观察rhIL-3、rhIFN-γ和DMSO对HL-60细胞的增殖与分化的影响。结果表明三者单独使用除rhIL-3早期有一定促生长作用外,都有抑制增殖和诱导HL-60细胞向粒系分化的作用,特别是DMSO对HL-60细胞有较强的诱导分化作用,且与剂量有关,rhIL-3作用次之,rhIFN-γ较弱。如分别与DMSO联合,则rhIL-3、rhIFN-γ均能加强DMSO对HL-60细胞的增殖抑制和诱导分化作用。     

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.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

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.