Rac1在肝癌细胞株生长和侵袭中的意义

目的:证实Rac1在肝癌细胞的生长与侵袭中的意义,寻找可能的肿瘤基因治疗新靶点。方法:特异性抑制Rac1蛋白表达的siRNA干扰肝癌高转移细胞株97-H,观察肝癌高转移细胞株97-H内Rac1表达、细胞生长、肿瘤细胞的活力和体外侵袭力的变化。结果:肝癌高转移细胞株97-H内Rac1表达、细胞生长受抑制,肿瘤细胞的活力和体外侵袭力显著降低。结论:Rac1表达的减少能够显著抑制肝癌细胞的生长和侵袭,可能成为肿瘤基因治疗新的靶点。     

Effects of vitamin D analogues EB1089 on proliferation,apoptosis and invasion of heptocellular cells

目的 探讨维生素D类似物EB1089对肝癌细胞株增殖、凋亡和侵袭的影响.方法 体外培养肝癌细胞株MHCC97H,用不同浓度的EB1089分别培养不同的时间段.用四唑蓝比色实验(MTT)检测细胞的存活和生长,用流式细胞仪检测细胞的凋亡,用Transwell和划痕实验检测细胞的侵袭迁移能力,用RT-PCR方法检测雌激素受体α(ERα)、核转录因子p65(NF-κB p65)和基质金属蛋白酶-9(MMP-9)的mRNA的表达.结果 EB1089可以抑制肝癌细胞株的增殖,诱导肝癌细胞发生凋亡,抑制肝癌细胞的侵袭迁移.同时,EB1089增加MHCC97H细胞中ERα mRNA表达,下调NF-κB p65和 MMP-9 mRNA表达.结论 EB1089可能通过ERα途径抑制肝癌细胞株的增殖、侵袭迁移能力,诱导其凋亡.     

JWA抑制人肝癌细胞的黏附和迁移侵袭潜能

探讨JWA蛋白在人肝癌细胞黏附和迁移侵袭过程中的作用?方法:应用小干扰RNA下调低转移潜能人肝癌细胞株MHCC97L中JWA蛋白表达水平,MTT法检测MHCC97L增殖;应用细胞小室检测MHCC97L在JWA不同蛋白水平时的迁移及侵袭潜能变化;黏附试验检测MHCC97L细胞黏附能力变化?结果:研究发现人肝癌细胞株MHCC97L中的JWA表达水平下降后,肝癌细胞迁移及侵袭能力明显增强,细胞对细胞外基质纤维连接蛋白的黏附力增加?结论:RNA干扰JWA引起肝癌细胞的JWA蛋白表达水平下降,导致肝癌细胞的黏附?迁移及侵袭能力增强,结果提示JWA可能抑制人肝癌细胞侵袭和转移?     

CXCR7/CXCL12轴对人肝癌细胞增殖能力的影响

目的观察不同恶性程度的肝癌细胞株中趋化因子受体CXCR7的表达情况,探讨CXCL12/CXCR7生物学轴对人肝癌细胞增殖能力的影响。方法以肝癌成瘤高转移细胞株MHCC97-H及成瘤低转移细胞株PLC/PRF/5为研究对象。采用RT-PCR、Western blot免疫印迹法检测两株肝癌细胞的CXCR7 mRNA与蛋白表达情况,应用CXCR7激动剂(重组人CXCL12)和特异拮抗剂(CCX771)分别刺激和阻断CXCR7功能,应用Alamarblue法检测细胞的增殖能力。结果 MHCC97-H细胞株CXCR7的mRNA与蛋白表达明显高于PLC/PRF/5细胞株,CXCL12能明显增强MHCC97-H细胞增殖能力(P<0.01),CXCR7阻断剂CCX771作用后,MHCC97-H细胞增殖能力明显下降(P<0.01);CXCL12对PLC/PRF/5细胞增殖能力无明显影响(P>0.05)。结论 CXCL12/CXCR7生物学轴与肝癌细胞株增殖能力有一定的关系,CXCR7拮抗剂CCX771可明显抑制肝癌细胞的增殖能力。     

C×CR7／CXCLl2轴对人肝癌细胞增殖能力的影响

目的观察不同恶性程度的肝癌细胞株中趋化因子受体CXCR7的表达情况,探讨CXCLl2／CXCR7生物学轴对人肝癌细胞增殖能力的影响。方法以肝癌成瘤高转移细胞株MHCC97-H及成瘤低转移细胞株PLC／PRF／5为研究对象。采用RT-PCR、Westernblot免疫印迹法检测两株肝癌细胞的CXCR7mRNA与蛋白表达情况,应用CXCR7激动剂（重组人CXCLl2）和特异拮抗剂（CCX771）分别刺激和阻断CXCR7功能,应用Alamarblue法检测细胞的增殖能力。结果MHCC97-H细胞株CXCR7的mRNA与蛋白表达明显高于PLC／PRF／5细胞株,CXCLl2能明显增强MHCC97-H细胞增殖能力（P〈0．01）,CXCR7阻断剂CCX771作用后,MHCC97一H细胞增殖能力明显下降（P〈0．01）;CXCLl2对PLC／PRF／5细胞增殖能力无明显影响（P〉0．05）。结论CxCLl2／CXCR7生物学轴与肝癌细胞株增殖能力有一定的关系,CXCR7拮抗剂CCX771可明显抑制肝癌细胞的增殖能力。     

RNA干扰HBx基因对肝癌细胞化疗效果的影响

目的：探讨RNA干扰技术和传统的化疗方法联合应用对肝癌细胞生长抑制作用的影响,并选择高效的治疗组合,研究其凋亡机制。方法：鉴定3组肝癌细胞——MHCC97-H(原肝癌细胞株),HK3细胞（转染空质粒的MHCC97-H细胞）和21543细胞（转染含HBx-shRNA质粒的MHCC97-H细胞）;RT-PCR检测RNA干扰对HBx mRNA沉寂作用,CCK8和TUNEL分别检测RNA干扰HBx后化疗药物对MHCC97-H肿瘤细胞生长的抑制及诱导细胞凋亡情况。结果：RT-PCR结果显示,与MHCC97-H细胞组比较,21543细胞的HBx mRNA水平下降约91%,HK3细胞HBx mRNA水平下降不明显;RNA靶向干扰HBx基因后的肝癌细胞（21543细胞）较原肝癌细胞（MHCC97-H细胞）和HK3细胞增殖明显减慢,而后两种细胞差别无统计学意义;3种不同细胞加用3种不同浓度的氟尿嘧啶(0~120 mg/L)、顺铂(0~32 mg/L)后细胞生长明显减慢并呈浓度依赖性,以RNA靶向干扰HBx基因后的21543细胞生长抑制最明显;相同浓度的氟尿嘧啶对3组不同肝癌细胞均可引起细胞凋亡,以21543细胞凋亡最明显。结论：RNA干扰HBx可明显抑制肝癌细胞的增殖,并增加肝癌细胞对化疗药物的敏感性;RNA干扰HBx基因和化疗药物联合应用使肝癌细胞凋亡更明显,细胞增殖速度明显减慢。     

维生素D类似物EB1089对肝癌细胞增殖凋亡侵袭的影响

目的探讨维生素D类似物EB1089对肝癌细胞株增殖、凋亡和侵袭的影响。方法体外培养肝癌细胞株MH-CC97H,用不同浓度的EB1089分别培养不同的时间段。用四唑蓝比色实验(MTT)检测细胞的存活和生长,用流式细胞仪检测细胞的凋亡,用Transwell和划痕实验检测细胞的侵袭迁移能力,用RT-PCR方法检测雌激素受体α(ERα)、核转录因子p65(NF-κB p65)和基质金属蛋白酶-9(MMP-9)的mRNA的表达。结果 EB1089可以抑制肝癌细胞株的增殖,诱导肝癌细胞发生凋亡,抑制肝癌细胞的侵袭迁移。同时,EB1089增加MHCC97H细胞中ERαmRNA表达,下调NF-κB p65和MMP-9 mRNA表达。结论 EB1089可能通过ERα途径抑制肝癌细胞株的增殖、侵袭迁移能力,诱导其凋亡。     

β细胞素下调对肝癌细胞增殖能力的影响及其机制探讨

目的:在肝癌细胞系中通过下调β细胞素(BTC)的表达研究其对肝癌细胞侵袭能力的影响并探究其影响机制。方法:通过siRNA转染下调BTC后,通过Transwell侵袭实验检测SMMC7721和MHCC97-H细胞的侵袭能力变化,并用RT-PCR和Western blot检测与肝癌侵袭能力相关的PI3K/AKT-XIAP信号通路的表达变化。结果:与阴性对照组相比,siRNA下调组中SMMC7721和MHCC97-H细胞的侵袭能力明显降低,PI3K/AKT-XIAP信号通路受到明显抑制。结论:下调BTC表达可能通过抑制PI3K/AKT-XIAP信号通路抑制肝癌细胞的侵袭能力。     

KAI1基因对肝癌细胞侵袭、转移的影响及其分子机制

目的研究肿瘤转移抑制基因KAI1对肝癌细胞侵袭、转移的影响及其分子机制,为肝癌的基因治疗提供理论和实验依据.方法用亚克隆技术构建KAI1基因正、反义真核表达质粒,DOTAP脂质体法将其分别转入高转移潜能的人MHCC97-H肝癌细胞,以限制性酶切、PCR、Western blot及免疫组化鉴定基因重组及转染是否成功.电镜观察细胞超微形态变化,流式细胞仪检测细胞周期分布,细胞生长曲线和平板法集落形成试验观察细胞生长和集落形成能力,Boyden Chamber试验观察细胞侵袭能力,微管吸吮技术测定细胞的粘弹性和粘附力.BALB/CA 4～6周龄雄性裸鼠80只,随机分正义组、反义组、亲本细胞组及空载体组进行皮下(n=40)和原位肝(n=40)种植试验,观察体内的成瘤性、侵袭性及远处转移能力,免疫组化研究癌转移灶AFP和肿瘤组织细胞外基质(ECM)及粘附分子的表达状况.结果(1)成功构建了KAI1正、反义基因真核表达质粒,并将其分别转入MHCC97-H人肝癌细胞;(2)发现转入KAI1基因后可导致肝癌MHCC97-H细胞的一些细胞器数量和形态的变化;(3)KAI1基因对肝癌MHCC97-H细胞的体内外生长、细胞周期及体内成瘤性无明显影响;(4)反义KAI1基因可使MHCC97-H细胞的克隆形成能力增强、对体内外肝癌细胞的侵袭和转移有促进作用;(5)KAI1基因表达上调能使MHCC97-H细胞的体内外侵袭能力降低;(6)KAI1基因抑制肝癌侵袭和转移的机制可能与细胞粘弹性增加、ECM表达上调、粘附分子表达下调及粘附力下降等变化有关.结论KAI1基因在肝癌的侵袭转移过程中发挥着重要作用,上调KAI1基因表达能明显降低肝癌细胞的侵袭和转移能力.     

GPC3对肝癌细胞株MHCC97-L增殖的影响

目的通过构建磷脂酰肌醇蛋白聚糖3(GPC3)增强型绿色荧光蛋白真核表达载体,研究GPC3对人肝癌细胞株MHCC97-L增殖的影响。方法用基因重组及限制性内切酶技术构建并鉴定表达载体pEGFP-c3-GPC3,通过脂质体介导转染人肝癌细胞株MHCC-97L,流式细胞术和G418筛选建立稳定细胞株;采用荧光定量PCR、Western blotting分别检测MHCC-97L中GPC3 mRNA和蛋白的表达情况,并在荧光显微镜下观察细胞荧光;MTT法检测GPC3对肝癌细胞MHCC97-L体外增殖能力的影响。结果经酶切及测序鉴定,确认成功构建真核表达载体pEGFP-c3-GPC3,荧光显微镜下观察到绿色荧光表达;从mRNA和蛋白水平证实,GPC3基因在转染后的MHCC-97L中成功表达;MTT生长曲线证实MHCC97-L/GPC3较其他两株细胞增殖显著加强(P<0.001)。结论成功构建pEGFR-c3-GPC3真核表达载体;筛选出稳定表达GPC3基因的MHCC97-L/GPC3细胞株;GPC3基因表达升高可促进肝癌细胞株MHCC97-L的增殖。     

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.     

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     

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.     

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…     

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.     

Possible Spread of adenovirus type 3 from poultry to humans ：indirect evidence from an outbreak in China

Objective:To explore the epidemiology and etiology for an outbreak of acute respiratory tract infection that occurred in one county of Jiangsu Province, China 2004. Methods: Only cases meeting the case definition were included in the study. We reviewed the medical records of the cases who were admitted to the local hospitals, interviewed cases by a standard questionnaire, and then described the epidemiotogic features and analyzed risk factors by means of a case-control study. We collected pharyngeal swab specimens and sent them to different laboratories for isolation and culture. The laboratory used different detection methods such as DIP, PCR, electron microscope examination and microneutralization assay, to identify and then type the positive specimens. Results:A total of 871 cases were reported during the period from April 18 to July 4,2004. The distribution of onset times presented two peaks, one in late May and another in middle June. The epidemic occurred mainly in the elementary and junior high schools in ten townships of one county, and the mean age of the cases was 12 years (range 7 months to 18 years). The course of the disease was acute, and was characterized by fever accompanied with sore throat and tonsillitis. The WBC count of cases was normal or elevated. The mean duration of illness was 5 days (range 2 to 12 days). No fatalities from illness were reported. A case-control study indicated that the possible risk factors were close contact with a case and/or poultry before onset and sharing of towels among members of the family. The typical CPE was observed through inoculating pharyngeal swab specimens into the HEP-2 cell cultures in different laboratories. An infection of adenovirus type 3 was verified by detecting positive specimens in different methods. Conclusion:This investigation demonstrated that the acute respiratory infection in cases was caused by adenovirus type 3. Cases occurred in over 70 schools in ten townships in 2004, and the route of transmission was possibly close contact with cases or droplet transmission.