川芎嗪抗大肠癌sw620裸鼠移植瘤血管生成及抑瘤机制的实验研究

目的:探讨川芎嗪对大肠癌实体瘤及其血管生成的抑制作用与机制.方法: 建立大肠癌sw620裸鼠移植瘤模型,随机分成5组:生理盐水组,川芎嗪低、中、高3个剂量组及恩度组.给药后检测移植瘤的体积和质量,观察移植瘤的病理形态学改变,并分别用免疫组化法和Western blotting法检测移植瘤组织中CD34、VEGF、HIF-1α蛋白表达.结果:与生理盐水组相比,川芎嗪中、高剂量组大肠癌sw620移植瘤的体积和质量明显减小,其瘤体内CD34、VEGF、HIF-1α的表达明显降低.结论:川芎嗪能抑制大肠癌sw620裸鼠移植瘤的生长,其作用机制可能与改善肿瘤组织的乏氧状况、抑制肿瘤血管生成有关.     

BAI1的血管生成抑制作用及肿瘤生长抑制作用的研究

目的研究脑组织特异性抑制因子1(BAI1)的血管生成抑制作用及其对胶质母细胞瘤的抑制作用。方法采用COS-TPC法进行重组腺病毒载体的构建,用Northern和Western印迹法测定BAI1mRNA及蛋白(17Kd)的表达。采用背侧皮肤折叠透明腔室法,用活体显微镜观察肿瘤细胞接种后血管生长情况,使用抗von Willebrand因子抗体的免疫组织化学染色,高倍镜下计算血管数量。将U373MG细胞接种于小鼠皮下,待肿瘤长至直径约0.5~1cm时,肿瘤内注射腺病毒重组子,每隔3d注射一次,共注射5次,隔日测量肿瘤大小。结果Northern印迹和Western印迹结果显示BAI1mRNA和蛋白的表达只见于AdeBAI1转染的细胞中,对照组的细胞中未见表达。经AdeBAI1转染细胞皮下接种后肿瘤血管被完全抑制,而对照组在接种后第12天时可见新生血管网形成。免疫组织化学染色结果显示,对照组肿瘤组织中血管数(16.0±3.2/视野,200×)明显多于AdeBAI1转染组(1.6±2.5/视野)。与对照组相比,采用AdeBAI1肿瘤内注射治疗的肿瘤体积明显小于对照组。结论BAI1具有抗血管生成作用,经AdeBAI1肿瘤内注射可以明显抑制肿瘤的生长速度,BAI1可以作为候选基因用于胶质母细胞瘤的基因治疗。     

百里醌对大肠癌生长和转移的抑制作用

目的探讨百里醌对大肠癌生长及转移的影响及其机制。方法百里醌作用大肠癌细胞株SW480后,cell count-ing kit-8(CCK-8)法检测细胞增殖;荧光显微镜下观察细胞形态;划痕试验和Transwell小室实验分别测定大肠癌细胞体外迁移和侵袭能力;用Western blotting检测大肠癌细胞中Mucin-4、HER-2和FAK蛋白表达;建立起裸鼠大肠癌皮下移植模型,观察百里醌对裸鼠大肠癌移植瘤生长的影响;免疫组织化学法检测肿瘤组织中Ki-67和Mucin-4阳性表达。结果与对照组相比较,百里醌可显著抑制体外大肠癌SW480细胞生长、迁移和侵袭,并明显诱导细胞凋亡;百里醌可呈显著下调大肠癌细胞中Mucin-4和HER-2的表达,并抑制FAK磷酸化;百里醌可显著抑制裸鼠大肠癌皮下移植瘤生长;百里醌可明显降低大肠癌肿瘤组织中Ki-67和Mucin-4的阳性表达。结论百里醌可显著抑制大肠癌生长和转移,该作用可能通过抑制Mucin-4蛋白表达而实现。     

RMB5A反义寡脱氧核苷酸对不同转移潜能大肠癌细胞系裸鼠移植癌体内影响研究

目的 观察RMB5A反义寡脱氧核苷酸对人大肠癌高、低转移潜能细胞系的裸鼠移植瘤的抑制作用及抑制肿瘤转移效果.方法 建立人大肠癌高转移和低转移的裸鼠模型,分组给予RAB5A反义寡核苷酸治疗,观察荷瘤鼠的肿瘤体积、肿瘤大小以计算抑瘤率;RT-PCR和免疫组化法检测治疗组RAB5A的表达.结果 在大肠癌裸鼠移植瘤高转移和低转移组中RAB5A反义寡核苷酸均具有抑瘤效果(P＜0.05).反义寡核苷酸组的肿瘤组织中RAB5A基因和蛋白质表达均减少,远隔脏器无转移发生.而正义寡核苷酸组以上指标均与模型组无差别(P＞0.05).结论 体内抑制RAB5A可抑制裸鼠移植癌生长及推迟转移.     

VEGF-mRNA和bFGF-mRNA在大肠癌中的表达及意义

目的探讨血管内皮细胞生长因子(VEGF)mRNA和碱性成纤维细胞生长因子(bFGF)mRNA在原发性大肠癌中的表达及其意义.方法应用原位杂交技术检测55例大肠癌VEGF-mRNA和bFGF-mRNA的表达情况.结果大肠癌组织VEGF-mRNA和bFGF-mRNA表达水平明显高于正常组织(P＜0.01);VEGF-mRNA和bFGF-mRNA表达水平与大肠癌血管侵犯、淋巴结受累、肝脏转移及临床病理分期密切相关(P＜0.05).VEGF-mRNA和bFGF-mRNA的表达水平与肿瘤大小、部位、年龄、性别、生长方式及组织学类型等因素无关.结论VEGF-mRNA和bFGF-mRNA表达水平与大肠癌的浸润、转移密切相关.VEGF-mRNA和bFGF-mRNA可作为原发性大肠癌的预后指标,可望为抑制原发性大肠癌血管生成治疗提供实验依据和新线索.     

电转染血管能抑素基因对C57小鼠Lewis肺癌生长和转移的影响

目的建立Lewis肺癌移植瘤模型,人血管能抑素(canstatin)基因重组表达载体电穿孔法转染至肿瘤局部,观察对肿瘤生长和转移的抑制作用。方法将Lewis肺癌细胞接种于C57BL小鼠皮下,成瘤后将30只小鼠随机分成3组,分别瘤体内注射血管能抑素重组载体、空载体和生理盐水,基因枪于注射部位电击,2周后PT-PCR法检测肿瘤组织中血管能抑素基因的表达并观察小鼠体重、肿瘤体积变化及肺转移结节数目。结果成功建立Lewis肺癌皮下移植瘤模型;电击2周后重组载体组仍存在血管能抑素基因的表达,重组载体组小鼠肿瘤体积由(1.03±0.11)cm3增加至(1.51±0.19)cm3,而空载体组由(1.01±0.09)cm3增至(2.45±0.18)cm3、NS组由(1.02±0.10)cm3增至和(2.54±0.21)cm3;重组载体组体积与后两组比较(P<0.01),即生长速度受到显著的抑制。重组载体组、空载体组和NS组的肺转移结节数分别为(3.50±1.24),(7.60±2.51)和(7.70±2.45);重组载体组与后两组比较(P<0.01),即肿瘤转移亦受到显著的抑制。结论血管能抑素可明显抑制Lewis肺癌移植瘤的生长与转移。     

血管内皮生长因子在大肠癌中的表达及意义

目的 :研究血管内皮生长因子 (VEGF)在大肠癌中的表达及与临床病理特征之间的关系。方法 :应用 SABC免疫组化技术检测 64例大肠癌、癌旁组织中 VEGF表达。结果 :VEGF在大肠癌中的阳性表达率为 59.4% ,明显高于癌旁组织和正常组织 ;大肠癌组织VEGF的表达与肿瘤浸润深度、淋巴结转移、远处转移、Dukes分期密切相关 ,而与组织学分型及分级无关。结论 :VEGF在大肠癌的生长、浸润和转移中发挥重要作用。     

VEGFR1阳性造血祖细胞簇与人大肠癌转移的关系

目的 观察血管内皮生长因子受体1(VEGFR1)阳性造血祖细胞与人大肠癌转移的关系及机制.方法 将人大肠癌细胞株SW480/M5瘤块原位接种至裸鼠结肠,建立大肠癌原位移植肝转移裸鼠模型,应用FCM观察转移灶内VEGFR1阳性造血祖细胞与大肠癌细胞的数量与比例及其相互关系,应用Western blot观察转移相关因子的表达.结果 肿瘤转移灶及尚未形成转移的常见部位均可见VEGFR1阳性造血祖细胞细胞簇.并且与肿瘤转移的时间呈正相关,而无肿瘤裸鼠未见此细胞簇形成;在肿瘤转移过程中,基质金属蛋白酶9、基质细胞衍生因子1蛋白表达逐渐增强.结论 VEGFR1阳性造血祖细胞簇形成总是伴随大肠癌转移.可能促进转移相关因子表达,促成转移的发生.     

腺病毒介导canstatin基因对肝癌的抑制作用

目的:探讨人canstatin基因对人肝癌移植瘤模型的抑制作用.方法:应用人肝癌细胞株SMMC-7721建立移植瘤模型.将裸鼠随机分成PBS组、空载体组和载体治疗组(腺病毒载体AdCan),两次注射.治疗期间测量皮下移植瘤的长径和短径;30 d后处死裸鼠,取肿瘤行常规病理切片,观察肿瘤组织坏死情况;检测肿瘤组织中caspase-3,Flk-1的表达.结果:完成注射治疗后第3日,AdCan基因治疗组肿瘤体积显著小于其余两组;治疗期间,HE染色显示AdCan基因治疗组坏死最明显;AdCan基因治疗组caspase-3表达高于空载体组和对照组;canstatin基因治疗组Flk-1的表达低于空载体组和对照组.结论:人canstatin基因对肝癌移植瘤的生长具有抑制作用,作用机制可能是降低Flk-1的表达进而抑制肿瘤的血管生成,抑制肿瘤的生长.     

LY294002增强5-氟尿嘧啶抑制裸鼠大肠癌移植瘤生长及转移的实验研究

目的:探讨磷脂酰肌醇3激酶(PI3K/Akt)信号通路抑制剂LY294002在裸鼠体内对5氟尿嘧啶(5-Fu)抑制大肠癌移植瘤生长及肝转移的影响。方法:采用细胞接种法建立裸鼠异位及原位移植瘤模型,观察LY294002、5-Fu及LY294002联合5-Fu对异位裸鼠移植瘤生长的抑制作用,用流式细胞仪检测异位裸鼠移植瘤细胞凋亡,用免疫共沉淀法检测Akt和Akt-ser473蛋白表达;观察LY294002、5-Fu及LY294002联合5-Fu对原位裸鼠移植瘤肝脏转移的影响情况,用免疫共沉淀法检测原位裸鼠移植瘤Akt、Akt-ser473的表达,用免疫组化法检测β-catenin及MMP-7蛋白表达。结果:与对照组比较,5-Fu、LY294002抑制异位移植瘤的生长,促进肿瘤细胞凋亡,LY294002显著促进5-Fu诱导的肿瘤生长抑制、细胞凋亡;与对照组比较肿瘤细胞的Akt表达无改变,Akt-ser473蛋白表达下降。与对照组比较,5-Fu、LY294002抑制原位移植瘤的肝脏转移,LY294002显著增强5-Fu抑制原位移植瘤的肝脏转移;与对照组比较原位移植肿瘤细胞的Akt表达无改变,Akt-ser473、β-catenin及MMP-7蛋白表达下降。结论:LY294002可增强5-Fu抑制裸鼠移植大肠癌生长及肝脏转移的作用。     

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.     

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.