IL-6诱导血管内皮细胞纤溶相关蛋白的表达

目的:观察IL-6对脐静脉血管内皮细胞(HUVECs)表达组织纤溶酶原激活物(tPA)和纤溶酶原激活物抑制物1(PAI-1)的影响.方法:用生长良好的第2、3代HUVECs细胞进行实验,用CCK-8测定IL-6(0.125、0.25、0.5、1.2 ng/ml)作用前后细胞活性;用发色底物法测定0.5 ng/ml IL-6组和对照组(不加IL-6)培养上清液中tPA、PAI-1活性;进一步用RT-PCR检测细胞内tPA和PAI-1 mRNA水平.结果:与对照组相比, IL-6(≤0.5 ng/ml)对细胞增殖活性的影响无差异性.0.5 ng/ml IL-6组tPA活性在12～72 h显著升高(P<0.05),且显著上调tPA mRNA,12 h达到峰值,以后渐降,48 h mRNA达正常水平.而IL-6组PAI-1活性与PAI-1 mRNA表达与对照组无差异性.结论: IL-6可活化内皮细胞,显著上调HUVECs的tPA mRNA的转录和tPA分泌,诱发纤溶系统活化,而对PAI-1 mRNA或PAI-1活性无影响.IL-6的这种效应在炎症反应的病理生理过程中可能发挥重要作用.     

PDGF对大鼠肾小球系膜细胞表达PAI-1的影响

目的:探讨血小板源性生长因子(PDGF-BB)对体外培养的大鼠肾小球系膜细胞表达纤溶酶原激活物抑制剂-1(PAI-1)的影响.方法:以0、5、10 ng/ml终质量浓度的PDGF-BB刺激体外培养的大鼠肾小球系膜细胞分别作用0、12、24、48 h, 以发色底物显色法检测细胞上清液中PAI-1的活性;以0、5、10 ng/ml质量浓度的PDGF-BB刺激系膜细胞24 h和10 ng/ml质量浓度的PDGF-BB刺激细胞0、12、24、48 h, 半定量RT-PCR观察系膜细胞PAI-1 mRNA表达情况.结果:0、5、10 ng/ml的PDGF-BB 作用于系膜细胞24 h,其PAI-1 mRNA/GAPDH mRNA分别为0.296、 0.428、0.542.10 ng/ml的PDGF-BB作用系膜细胞0、12、24、48 h, PAI-1 mRNA/GAPDH mRNA分别为0.156、0.345、0.493、0.597,表现为浓度和时间依赖效应.PDGF-BB也可浓度依赖性地增加PAI-1的活性,24 h内活性逐渐增高,48 h时下降.结论:PDGF-BB可上调体外培养的大鼠肾小球系膜细胞PAI-1的活性及其mRNA的表达,提示PDGF可能通过抑制细胞外基质的降解导致细胞外基质的积聚,从而参与肾小球硬化的过程.     

IL-6对血管内皮细胞活性及TF mRNA表达的影响

目的研究IL-6对脐静脉血管内皮细胞（HUVECs）组织因子（TF）的mRNA水平的影响．方法应用胰酶消化HUVECs并进行传代培养，用第二、三代细胞进行试验。测定IL-6（0．5ng／mL）处理前后细胞活性，反转录聚合酶链反应（RT—PCR）法检测细胞内TFmRNA水平。结果72h内，IL-6对HUVECs的活性的影响与正常对照组相比差异无统计学意义。IL-6作用HUVECs6h即诱导TFmRNA表达，12h达到高峰，以后表达减弱，72h不能检测到mRNA；对照组TF mRNA不表达或表达极弱。结论IL-6（0．5ng／mL）对HUVECs的活性不造成直接的影响，同时在24-48h内IL-6（0．5ng／mL）可诱导HUVECs TF表达，这可能与IL-6作为前炎症因子诱导急性炎症反应时相的血液循环障碍相关。     

血流剪切应力刺激后人脐带内皮细胞HIAP-2的表达

目的:阐明血流剪切应力抑制血管内皮细胞凋亡的分子机制.方法:人脐静脉内皮细胞(HUVECs)培养于DMEM,细胞融合时将细胞暴露于2 N/m2的剪切应力,分别用Nortern blot及Western blot法检测人凋亡抑制蛋白2(HIAP-2)mRNA及蛋白的表达.结果:HUVECs在静止状态下表达少量HIAP-2mRNA及蛋白,在2N/m2的剪切应力2～6 h刺激下可诱导HUVECs产生HIAP-2mRNA,且量明显增加.HIAP-2蛋白在2 N/m2剪切应力4～24 h刺激下表达明显增加.结论:生理水平剪切应力能够明显诱导内皮细胞产生HIAP-2mRNA和蛋白的表达,可能是剪切应力抑制内皮细胞凋亡发挥抗动脉粥样硬化作用的机制之一.     

氟伐他汀对内脏脂肪素诱导的内皮细胞间黏附因子-1表达的影响

目的 探讨不同浓度的氟伐他汀对内脏脂肪素(visfatin)诱导的人脐静脉内皮细胞(HUVECs)细胞间黏附因子-1(ICAM-1)mRNA表达的影响.方法 体外培养HUVECs,待细胞生长到融合状态时加入不同浓度的氟伐他汀(10-5～10-7 mol/L)孵育20 min,后加入visfatin(800 ng/ml)作用24 h,采用逆转录-聚合酶链反应(RT-PCR)技术测定ICAM-1mRNA的表达.结果 不同浓度的氟伐他汀可浓度依赖性的抑制visfatin诱导的ICAM-1mRNA的表达(P<0.05) .结论 氟伐他汀可有效阻止visfatin介导的炎症反应,具有抗炎作用,可预防动脉粥样硬化的发生.     

抑肽酶抑制凝血酶诱导的人脐静脉内皮细胞IL-8的表达

目的 研究抑肽酶对凝血酶诱导的人脐静脉内皮细胞(HUVECs)IL-8表达和核因子κB(NF-κB)活性的影响.方法 将培养的HUVECs分为空白对照组、凝血酶组以及半量和全量抑肽酶组,抑肽酶组细胞采用800 KIU/ml(半量)和1 600 KIU/ml(全量)抑肽酶预处理1 h,后续处理与凝血酶组相同,均以凝血酶(4 U/ml)诱导刺激作用. ELISA法测定细胞培养上清液中IL-8的含量;荧光实时定量PCR检测IL-8 mRNA的表达,扩增产物进行熔解曲线图和琼脂糖电泳分析;采用激光共聚焦显微镜观察NF-κB p65在细胞胞质和胞核的分布情况.结果 凝血酶明显刺激HUVECs IL-8的分泌和IL-8 mRNA的表达,细胞中游离的NF-κB增加并发生核转位.半量和全量抑肽酶均能减少凝血酶诱导的HUVECs IL-8的分泌和IL-8 mRNA的表达,且对细胞内游离NF-κB的产生和核转位具有明显抑制作用,半量和全量抑肽酶组对NF-κB表达的抑制作用差异无显著性意义(P>0.05).结论 抑肽酶均能够减少凝血酶诱导的HUVECs IL-8的表达,该作用与其抑制细胞内活化的NF-κB核转位有关.     

白细胞介素-4对肺泡上皮细胞钠离子通道β亚基调控研究

目的 研究不同时间不同剂量白细胞介素-4(IL-4)作用下A549细胞钠离子通道β亚基(β-ENaC)的变化情况.方法 以A549细胞为模型,在含IL-4培养基不同时间不同剂量培养下,分别用免疫印迹法以及RT-PCR法测定β-ENaC蛋白表达以及mRNA变化转录情况.结果 IL-4可以呈剂量、时间依赖性的下调β-ENaC的表达,这种蛋白表达的下调作用是通过基因涮控起作用的.IL-4(1 ng/ml)培养A549细胞3 h,β-ENaC蛋白及mRNA开始下降,在6 h后出现显著差异(P<0.05),不同剂量的IL-4(0.1、10、100 ng/ml)培养A549细胞12 h在0.1 ng/ml时即出现显著的差异(P<0.05).结论 IL-4可通过下调β-ENaC的表达抑制肺泡水肿液清除能力,从而不利于急性肺损伤/急性呼吸窘迫综合征的预后.     

MCP-3对人脐静脉内皮细胞表达ICAM-1、VCAM-1、TF/TFPI及其凋亡的影响

目的研究单核细胞趋化因子-3（MCP-3）对人脐静脉内皮细胞（HUVECs）表达ICAM-1、VCAM-1、TF、TFPI 及其凋亡
的影响。方法分离、培养人脐静脉内皮细胞,分别给予0~3.0 ng/ml的MCP-3进行干预,确定MCP-3对HUVECs的最适作用
浓度,以此浓度干预HUVECs,在MCP-3 加药之前1 h 分别给予MCP-3 抗体（20 ng/ml）、PI3K抑制剂LY-294002（5 mmol/ml）
处理细胞,MCP-3 作用24 h 后提取各组总RNA、总蛋白,用RT-PCR、Western blot 分别检测干预后的ICAM-1、VCAM-1、TF、
TFPI 的表达。模拟病理状态,用ox-LDL 干预HUVECs与空白组对照,24 h 后提取各组总RNA、总蛋白,用RT-PCR、Western
Blot 分别检测各组MCP-3 表达情况。最后,用MCP-3 及MCP-3+CCR2 拮抗剂RS102895（6μmol/L）分别干预HUVECs,作用
24、48 h 分别检测HUVECs凋亡率及caspase3 的表达,并与空白对照组比较。结果MCP-3 对HUVECs的最适作用浓度为
0.3 ng/ml（P<0.05）;MCP-3 可诱导HUVECs 细胞中ICAM-1、VCAM-1、TF 表达的增加,同时可抑制TFPI 表达（P<0.05）;
MCP-3 抗体和LY-294002 可分别拮抗、抑制此作用（P<0.05）;ox-LDL 可上调HUVECs表达MCP-3（P<0.05）;作用24、48 h 后
MCP-3 可明显诱导HUVECs凋亡,CCR2 抑制剂可拮抗此作用。结论ox-LDL 可诱导HUVECs表达MCP-3,MCP-3 可诱导
HUVECs凋亡,且可能部分通过PI3K信号通路影响HUVECs功能。
     

内脏脂肪素促进内皮细胞合成单核细胞趋化蛋白1和白介素6的实验研究

目的 探讨内脏脂肪素是否能调节内皮细胞单核细胞趋化蛋白1(MCP-1)和白介素6(IL-6)生成以及胰岛素受体(IR)的介导作用.方法 不同剂量和不同干预时间的内脏脂肪素刺激3～5代脐静脉内皮细胞(HUVEC);然后在内脏脂肪素(100 ng/m1)刺激基础上加入IR酪氨酸激酶抑制剂预处理HUVEC,24 h后测定MCP-1和IL-6蛋白和基因表达.酶联免疫吸附法和实时定量聚合酶链反应检测MCP-1和IL-6蛋白和mRNA表达.结果 内脏脂肪素剂量和时间依赖性促进HUVEC合成MCP-1[剂量效应:对照组:(62±10) pg/ml、100 ng/ml:(273±65) pg/ml、500 ng/ml:(1630±103) pg/ml;时间效应:对照组:(37±27) pg/ml、12 h:(184±56) pg/ml、48 h:(328±80) pg/ml]和IL-6[剂量效应:对照组:(31.8±1.7) pg/ml、100 ng/ml:(42.5±5.7) Pg/ml、500 ng/ml:(154.7±10.2) pg/ml;时间效应:对照组:(15.7±3.4) pg/ml、12 h:(35.4±4.7) pg/ml、48 h:(77.6±11.8) pg/ml].IR酩氨酸激酶抑制剂抑制内脏脂肪素诱导的MCP和IL-6蛋白和基因表达.结论 内脏脂肪索能诱导HUVEC合成和分泌MCP-1、IL-6,其作用通过IR信号通路介导.     

IL-31和他克莫司对Hacat细胞NT4表达的影响

目的:探讨白介素-31(interleukin-31,IL-31)、他克莫司对角质形成细胞神经营养素-4(neurotrophin-4,NT4)表达的影响。方法:培养人角质形成细胞株(Hacat细胞),采用不同浓度他克莫司作用24 h,噻唑蓝比色法(MTT法)检测细胞增殖活性。IL-31、他克莫司单独或共同作用于Hacat细胞24 h后,采用real-time PCR法检测NT4 m RNA表达,酶联免疫吸附法(ELISA)分别检测12、24 h各组细胞上清液中NT4含量。结果:低浓度他克莫司(10、100)ng/ml对细胞活性无明显影响(P>0.05),高浓度(1 000 ng/ml)时细胞活性受到抑制(P=0.002)。IL-31作用Hacat细胞后,其NT4m RNA表达和上清中NT4含量均增加(P<0.05);100 ng/ml他克莫司作用24 h后他克莫司组和联合作用组细胞NT4 m RNA表达量和细胞上清中NT4含量均分别低于对照组和IL-31组(P<0.05)。结论:IL-31可促进角质形成细胞NT4表达,他克莫司可能通过降低角质形成细胞NT4表达水平而发挥其抗瘙痒作用。     

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.     

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…     

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.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.