基因芯片对PMA激活的血管内皮细胞早期反应基因？…

目的：用基因芯片研究ＰＭＡ激活的血管内皮细胞的早期反应基因（ｉｍｍｅｄｉａｔｅ ｅａｒｌｙ ｒｅｓｐｏｎｓｅ ｇｅｎｅ，ＥＲＧ）。方法：以包含４０９６条人类基因的ＮＤＡ芯片检测血管内皮细胞受代谢增强剂ＰＭＡ（ｐｈｏｒｂｏｌ ｍｙｒｉｓｔａｔｅ ａｃｅｔａｔｅ）激活后早期的基因表达谱，并从中筛查出ＥＲＧ。结果：血管内皮细胞ＰＭＡ作用６ｈ后，１７条基因上调，１１条下调。数据处理聚类分析表明１７例上调基     

mm—LDL对内皮细胞转录因子NF—kB活性的影响

目的 研究轻微修饰低密度脂蛋白（mm-LDL）激活内皮细胞转录因子NF－kB的信号传导途径以及NF－kB对血小板源性生长因子B链（PDGFb）表达的调控作用。方法 以FeSO4修饰法制备mm-LDL,以正常LDL（n-LDL）作对照,作用于培养内皮细胞后提取核蛋白,用凝胶阻滞实验检测转录因子NF－kB停车场 及结合活性的变化。观察自由基清除剂probucol及PDTC对mm-LDL激活内皮细胞转录因子NF－kB的影响。通过检测报告基因探讨核因子诱导激酶（NIK）和核因子－kB抑制亚基激酶（IKK）在激活内皮细胞转录因子NF－kB的信号传导途径中的作用以及mm-LDL激活的NF－kB对PDGFb基因启动子的作用。结果 mm-LDL能激活培养内皮细胞转录因子NF－kB,自由基清除剂probucol和PDTC对mm-LDL激活内皮细胞转录因子NF－kB还能增加带有PDGFb基因上游调控序列（－189／＋43)的报告基因荧光素酶的活性。Slot blot结果显示变异型NIK能显著减少受mm-LDL刺激的内皮细胞PDGFb mRNA含量。结论 mm-LDL可通过NIK－IKK途径激活内皮细胞转录因子NF－kB并促进PDGFb基因表达。     

缺氧中和缺氧后亚低温时炎症基因表达谱的变化

目的了解缺氧中和缺氧后亚低温时炎症相关基因的变化。方法将体外培养的人脑血管内皮细胞(HCEC)分为对照组和实验组。对照组细胞常规培养,实验组细胞去掉细胞培养液,更换为无血清、低糖M199,置于缺氧箱房中,再分为2组:Ⅰ组为常温缺氧后低温恢复;Ⅱ组为低温缺氧后常温恢复。取细胞并分离总RNA后,用DNA微列阵技术观察缺氧以及缺氧中和缺氧后亚低温时HCEC炎症相关基因表达谱的变化。结果1)白介素-1受体1型(IL-1R1)、类1型白介素-1受体(IL-1RL1)、白介素-1β(IL-1β)、白介素-11(IL-11)、γ-干扰素调节因子2(IRF2)和集落刺激因子1(CSF1)分别在某些时间点上调;白介素-1受体拮抗剂(IL-1RN)、白介素-6(IL-6)、γ-干扰素受体2(IFNGR2)、集落刺激因子3受体(CSF3R)、淋巴细胞黏附因子1(SELL)、细胞间黏附因子3(ICAM3)、血小板/内皮细胞黏附因子(PECAM1)和内皮细胞黏附因子1(SELE)则在不同的时间点下调;γ-干扰素诱导蛋白30(IFI30)在某一些时间点上调,但在低温缺氧后常温恢复时下调;肿瘤坏死因子家庭成员7(TNFRSF7)则仅在低温时下调。2)缺氧4 h、32℃低温使下调基因增多。结论缺氧可以使IL-1βI、L-1RL1I、L-1R1等部分损伤性炎症基因表达上调,IL-11的上调可能为保护性反应;TNF基因表达的上调可能起双重作用。     

NF-κB通过调控早期反应基因-2参与小鼠肝再生启动

目的结合基因芯片技术、生物信息学分析和染色质免疫共沉淀技术分析小鼠肝再生启动阶段的差异表达基因,并探讨其调控方式。方法采用小鼠全基因组基因表达谱芯片检测并验证肝再生启动阶段2组差异表达基因;应用基于TRANSFAC数据库的PAINT对差异表达基因进行转录调控分析;最后运用染色质免疫共沉淀技术验证NF-κB的潜在靶基因。结果肝切后4 h小鼠差异表达基因共332个(上调127个,下调205个),其中早期反应基因-2(immediate earlyresponse 2,IER2)上调约5倍;对所有差异表达基因进行PAINT分析,预测到多个转录因子如Stat家族和NF-κB均参与差异表达基因调控网络;免疫共沉淀技术证实IER2受NF-κB调控。结论NF-κB可能通过调控IER2参与肝再生启动。     

羟自由基调控血管平滑肌细胞蛋白变化的生物信息学研究

目的 通过对羟自由基(·OH)诱导血管平滑肌细胞差异表达蛋白的系统生物信息学分析，探讨·OH调控血管平滑肌细胞的相关分子机制。方法 对485个差异表达蛋白(337个上调和148个下调蛋白)进行功能和通路富集、亚细胞定位预测、蛋白-蛋白互作(PPI)和信号网络构建，以及基因-miRNA、转录因子-基因和蛋白-化学品互作分析。结果 ·OH诱导的血管平滑肌细胞差异表达蛋白显著富集在一系列细胞核和细胞质中及与蛋白质活动有关的通路上；在PPI网络中，连环蛋白β1、组蛋白脱乙酰酶1和部分核糖体、蛋白酶体蛋白可能是·OH调控的关键节点蛋白。此外，发掘出一批miRNA(例如mir-181a-5p)、转录因子(例如上游结合转录因子)和化学品(例如四氯二苯二氧芑),亦可能参与·OH对血管平滑肌细胞的调控。结论 预测·OH可调控多种分子，影响血管平滑肌细胞功能。     

人脐静脉内皮细胞脂多糖刺激后上调基因表达谱的分析

目的 对人脐静脉内皮细胞(HUVEC)受脂多糖(LPS)刺激后上调基因表达谱进行筛选及分析。方法 以受LPS刺激HUVEC为实验方，末刺激别HUVEC为驱使方，进行抑制消减杂交(SSH)建立消减cDNA文库，经菌落原位斑点杂交筛选文库后将阳性克隆测序和同源性分析，并用RT-PCR验证新的cDNA序列。结果 共获得25条上调表达的基因，分别与炎症反应、细胞骨架重构、细胞生长和凋亡、胞内信号转导相关，并克隆到3条新基因表达序列标签(EST)，RT-PCR验证了这些新EST序列只在LPS刺激的内皮细胞中表达。结论 抑制消减杂交有效地克隆了人脐静脉内皮细胞LPS刺激后上调表达基因，有助于阐明LPS直接激活血管内皮细胞的分子机制。     

从基因敲除小鼠心肌组织中筛选热休克反应中受HSF1调控的靶基因

目的：用cDNA芯片从热休克转录因子1（HSF1）基因敲除小鼠心肌组织中筛选热休克反应受HSF1调控的靶基因。方法：用cDNA芯片检测热休克反应（42℃ 15 min,恢复3 h）中HSF1 / 小鼠心肌组织基因表达谱的改变(以HSF1+/+小鼠为对照);用RT PCR对cDNA芯片筛选结果进行验证;对差异表达的已命名基因进行启动子区转录因子结合位点的分析。结果：共筛选到差异表达基因1 142个;其中在HSF1 / 小鼠心肌中表达下调的基因为398个,已命名基因为173个;在HSF1 / 小鼠心肌中表达上调的基因为641个,已命名基因为235个。在HSF1 / 小鼠心肌中表达下调2.5倍的已命名基因中,有5个基因启动子区含有热休克元件（HSE）;在HSF1 / 小鼠心肌中表达上调2.5倍的已命名基因中,有6个基因启动子区含有HSE。结论：在热休克反应中,HSF1可对多个基因的表达进行直接或间接的调控。     

电离辐射影响成纤维细胞基因调控网络的初步研究

目的 探讨电离辐射影响人成纤维细胞基因表达的转录调控机制,并构建基因与相应转录因子的调控网络.方法 先对前期研究已经获得的差异表达基因进行功能注释,选择结合功能类基因(数量最多)进人研究:再用MaxLAPS,TFME和SCOPE 3种软件预测这些基因的转录因子和转录因子结合位点;利用Bibliosphere软件构建转录因子与基因的转录调控网络.结果 获得25条Gene Symbols,基因本体功能注释集中于结合功能(共19条),2种程序预测得到14个相同的转录因子,得分最高的6个转录因子结合位点对应的转录因子与预测的基本一致.按照最高水平标准构建的转录调控网络,显示CASPASE-3位于网络的核心.结论 电离辐射很可能经转录因子TP53介导CASPASE-3激活而致人成纤维细胞凋亡.     

肝细胞癌与胎儿肝脏中对表达抑制的基因的全面研究,dudulin-2mRNA的表达抑制可作为肝硬化发展至肿瘤过程中的一种可能标记

背景与目的:肝细胞癌诱导的转录重编程序是否与肝脏发育过程中的调控程序相同还不清楚。方法:用成人肝细胞作为对照,通过微阵列技术对肝的基因转录本进行全面研究,研究肝细胞癌结节与妊娠22～24周前(早期)或后(晚期)胚胎肝细胞m R NA丰度之间的相似度及差别。通过定量R T-PCR进一步研究肝细胞标本某些m RN A水平的变化。结果:肝细胞癌中表达改变的基因多为表达下调,与晚期胚胎肝细胞中表达受抑制的基因大部分相同。被下调基因与对照基因的转录因子结合位点的不同以及相关转录因子m RN A丰度的变化都提示基因表达抑制。下调的m R NA编…     

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.     

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.     

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.