增强miR-146b-3p表达对胰腺癌细胞增殖和凋亡的影响

目的 探讨增强miR-146b-3p表达对胰腺癌细胞增殖和凋亡的影响.方法 Real time PCR检测miR-146b-3p在6种人胰腺癌细胞系(MIA PaCa-2、BxPC-3、AsPC-1、PANC-1、SW1990、PC-3)和手术切除的12对胰腺癌/癌旁组织中的表达.将Pre-miR-hsa-miR-146b-3p Precursor 转染MIA PaCa-2 细胞,Real time PCR检测转染后miR-146b-3p的表达变化,四甲基偶氮唑蓝(MTT)法检测细胞增殖能力,流式细胞仪检测细胞凋亡率,免疫印迹法(Western blot)检测凋亡相关蛋白Bcl-2、Bax、Caspase-3、Caspase-8的表达变化.结果 与正常胰腺组织相比,miR-146b-3p在6种胰腺癌细胞系中均呈低表达,以MIA PaCa-2细胞最为明显;12对胰腺组织中,癌组织miR-146b-3p表达水平均低于癌旁组织.同阴性对照组比较,转染前体组的MIA PaCa-2细胞,miR-146b-3p表达增强383.25倍,细胞增殖能力下降,细胞凋亡率增加,蛋白Bcl-2表达降低(50.0%),Bax表达升高(4.29倍).结论 miR-146b-3p在胰腺癌细胞系和癌组织中低表达;上调胰腺癌细胞MIA PaCa-2中 miR-146b-3p的表达,能够抑制增殖和诱导细胞凋亡,其机制可能与下调Bcl-2表达,上调Bax的表达有关.     

miR-3662在胆囊癌组织中的表达及对胆囊癌细胞增殖的影响

目的探讨miR-3662在胆囊癌组织中的表达及对胆囊癌细胞增殖的影响。方法选取30对人胆囊癌组织及其癌旁组织标本;将GBC-SD和SGC-996细胞分为miR-3662组和miR-NC组,其中miR-3662组细胞转染miR-3662,miR-NC细胞转染miR-NC;将8只裸鼠随机分为实验组和阴性对照组,每组4只,其中实验组裸鼠接种miR-3662组细胞,阴性对照组裸鼠接种miR-NC组细胞。采用qRT-PCR法检测miR-3662在30对人胆囊癌组织及癌旁组织中的相对表达量;采用CCK-8法检测转染细胞的吸光度（A）值、平板克隆形成实验观察细胞集落形成数、制取裸鼠皮下移植瘤检测瘤体质量。结果miR-3662在人胆囊癌组织中的相对表达量明显低于癌旁组织（P＜0.05）;miR-3662组GBC-SD和SGC-996的miR-3662的相对表达量较miR-NC组均明显上调（均P＜0.05）;加入CCK-8后第5天时,与miR-NC组相比,miR-3662组细胞A450值明显为小（P＜0.05）;miR-3662组GBC-SD和SGC-996的集落形成数较miR-NC组均明显减少（均P＜0.05）;实验组的裸鼠皮下移植瘤体质量较阴性对照组明显减少（P＜0.05）。结论miR-3662在人胆囊癌组织中低表达,能够抑制人胆囊癌细胞的增殖能力,可能作为胆囊癌治疗的新靶点。     

MSC-exo一种新型细胞递送工具转运靶向基因调控胰腺癌增殖效应分析

目的 观察1种新型细胞递送工具（MSC-exo）转运靶向基因调控胰腺癌增殖效应。方法 透射电子显微镜（transmission electron microscope,TEM）和纳米颗粒跟踪分析技术（nanoparticle tracking analysis,NTA）鉴定人间充质干细胞外泌体（human mesenchymal stem cell exosomes,MSC-exo）并转运miR-450a-5p进入CFPAC-1,探讨miR-450a-5p靶向BZW2抑制胰腺癌细胞增殖效应。基因技术处理Pc-BZW2,CCK-8、EdU、细胞划痕、Transwell验证MSC-exo与MSC-exo-miR-450a-5p对细胞的抑制作用。结果 与胰腺正常组织相比miR-450a-5p在胰腺癌组织中低表达（P<0.05）,CFPAC-1细胞MSC-exo-miR-450a-5p外泌体标记蛋白CD63、TSG101表达高于MSC-exo(P<0.05)。CCK-8、EdU、细胞划痕、Transwell实验显示MSC-exo-miR-450a-5p较MSC-exo可显著抑制CF...     

MicroRNA-92a 在胰腺癌中的表达及对肿瘤生长的影响

目的??探讨人胰腺导管腺癌（PDAC）中 microRNA-92a（miR-92a）的表达及对肿瘤细胞生长 的影响。方法??实时荧光定量聚合酶链反应（qRT-PCR）检测 PDAC 组织中 miR-92a 的表达水平 ; 慢病毒 转染 PANC-1 细胞构建 miR-92a 稳定敲除模型,克隆形成与流式细胞仪检测细胞增殖凋亡 ; 通过裸鼠皮下 种植瘤模型检测下调 miR-92a 表达对肿瘤体内生长的影响 ; PCR 及 Western?blotting 检测 miR-92a 下游靶点 DOC-2/DAB2 结合蛋白（DAB2IP）在体外培养细胞中的表达水平 ; 免疫组织化学检测 DAB2IP 在移植瘤组 织中的表达水平。结果??miR-92a 在 PDAC 组织中表达水平高于癌旁组织（ P ?<0.05） ; miR-92a 高表达的胰 PDAC 者肿瘤体积较 miR-92a 低表达者更大（ P ?<0.05） ; 下调 miR-92a 的表达能够抑制胰腺癌 PANC-1 细 胞体外增殖能力,促进细胞凋亡,并抑制 PANC-1 细胞裸鼠皮下种植瘤的生长 ; 下调 miR-92a 表达提高了 PANC-1 细胞内 DAB2IP 的表达水平及移植瘤组织内 DAB2IP 的表达水平（ P ?<0.05） 。结论??miR-92a 在胰 腺癌中表达升高, 下调 miR-92a 的表达能使 DAB2IP 的表达下调而发挥抗肿瘤生长作用。     

miR-431-5p通过调控AKT1抑制胰腺癌细胞增殖、迁移、侵袭和促进凋亡研究

目的研究miR-431-5p对胰腺癌细胞增殖、迁移、侵袭和凋亡的影响和潜在的分子机制。方法qRT-PCR检测人正常胰腺上皮细胞hTERT-HPNE和胰腺癌细胞CFPAC-1和PANC-1中miR-431-5p表达水平。转染miR-431-5p模拟物至胰腺癌CFPAC-1细胞中过表达miR-431-5p后,MTT法测定细胞增殖活性,Transwell检测细胞迁移和侵袭,流式细胞术检测细胞凋亡,Western blotting检测细胞中Cyclin D1、p21、Bax、Bcl-2、E-cadherin、MMP-2和丝氨酸/苏氨酸蛋白激酶1（AKT1）蛋白表达。双荧光素酶报告基因实验验证miR-431-5p与AKT1的调控关系。结果与hTERT-HPNE细胞相比,胰腺癌细胞PANC-1和CFPAC-1中miR-431-5p表达量降低（P < 0.05）。过表达miR-431-5p后,CFPAC-1细胞活性、迁移和侵袭细胞数降低,凋亡率升高,Cyclin D1、Bcl-2和MMP-2蛋白表达水平降低,p21、Bax和E-cadherin蛋白表达水平升高,差异均有统计学意义（P < 0.05~P < 0.01）。双荧光素酶报告基因实验结果显示,miR-431-5p在CFPAC-1细胞中靶向负调控AKT1表达。同时过表达miR-431-5p和AKT1后,CFPAC-1细胞活性、迁移和侵袭细胞数升高,凋亡率降低,Cyclin D1、Bcl-2和MMP-2蛋白表达水平升高,p21、Bax和E-cadherin蛋白表达水平降低,差异均有统计学意义（P < 0.05）。结论miR-431-5p通过靶向抑制AKT1降低胰腺癌CFPAC-1细胞的增殖、迁移和侵袭能力,并促进细胞凋亡,可能是胰腺癌的潜在分子治疗靶点。     

微小RNA-155反义寡核苷酸对乳腺癌MDA-MB-157细胞及裸鼠移植瘤的作用

目的 ：探讨微小RNA-155（microRNA-155,miR-155）反义寡核苷酸（antisense oligonucleotide, ASO）对乳腺癌MDA-MB-157细胞增殖、凋亡及裸鼠移植瘤的作用。方法：设计合成化学修饰的miR-155 ASO,通过LipofectamineTM 2000转染MDA-MB-157细胞,激光共聚焦检测转染率,real-time PCR测定转染后miR-155表达水平的变化,CCK-8法检测细胞增殖抑制率,流式细胞仪检测细胞凋亡率,观察miR-155 ASO对裸鼠成瘤能力的影响,免疫组织化学法检测瘤体组织Caspase-3的表达。结果：激光共聚焦检测转染率达80%以上。转染miR-155 ASO后,miR-155表达明显下降,细胞增殖能力降低,凋亡增加。miR-155 ASO能明显抑制裸鼠移植瘤生长,抑制率为52.98%,并且能显著增加Caspase-3的表达。结论：miR-155 ASO能显著下调miR-155的表达水平,继而抑制乳腺癌MDA-MB-157细胞的增殖,促进其凋亡;并且通过增加靶基因Caspase-3的表达,抑制裸鼠移植瘤的生长,为miR-155作为乳腺癌治疗靶点提供了实验依据。     

微小RNA-155反义寡核苷酸对乳腺癌MDA—MB-157细胞及裸鼠移植瘤的作用

目的：探讨微小RNA-155（microRNA．155,miR-155）反义寡核苷酸（antisenseoligonucleotide,AS0）对乳腺癌MDA-MB-157细胞增殖、凋亡及裸鼠移植瘤的作用。方法：设计合成化学修饰的miR-155ASO,通过Lipofectamine^TM 2000转染MDA-MB-157细胞,激光共聚焦检测转染率,real-timePCR测定转柒后miR-155表达水平的变化,CCK-8法检测细胞增殖抑制率,流式细胞仪检测细胞凋亡率,观察miR-155ASO对裸鼠成瘤能力的影响,免疫组织化学法检测瘤体组织Caspase-3的表达。结果：激光共聚焦检测转染率达80％以上。转染miR-155AS0后,miR-155表达明显下降,细胞增殖能力降低,凋亡增加。miR-155AS0能明显抑制裸鼠移植瘤生长,抑制率为52．98％,并且能显著增加Caspase-3的表达。结论：miR-155AS0能显著下调miR-155的表达水平,继而抑制乳腺癌MDA-MB-157细胞的增殖,促进其凋亡;并且通过增加靶基因Caspase-3的表达,抑制裸鼠移植瘤的生长,为miR-155作为乳腺癌治疗靶点提供了实验依据。     

干扰内皮素-1 可抑制鼻咽癌细胞增殖、迁移和侵袭

目的探讨干扰内皮素-1（ET-1）基因对鼻咽癌细胞增殖、迁移及侵袭的影响以及相应的分子机制。方法构建ET-1 shRNA慢病毒干扰载体,成功包装慢病毒后感染鼻咽癌5-8F细胞。Western blotting检测ET-1干扰效率。利用MTT、细胞周期 检测、平板克隆形成实验、Transwell 小室、Boyden 小室以及裸鼠皮下成瘤实验分别检测细胞增殖、迁移、侵袭能力的改变。 Western blotting 检测上皮间质转化（EMT）相应基因表达改变。结果与对照组细胞相比,鼻咽癌细胞5-8F 感染慢病毒 shRNA-ET-1后ET-1的表达水平显著降低。MTT实验结果显示,在抑制ET-1表达后细胞增殖能力显著下降。流式细胞仪检测 细胞周期显示干扰ET-1表达,G1细胞数明显增多。平板克隆形成实验结果显示干扰ET-1表达,癌细胞克隆形成能力显著下 降。皮下裸鼠成瘤实验结果同样显示,ET-1表达抑制后癌细胞成瘤能力显著下降。Transwell和Boyden小室结果表明,ET-1表 达沉默后可显著降低细胞的迁移和侵袭能力。通过检测ET-1 沉默后EMT 相关分子的表达改变,结果显示上皮标志物 E-cadherin和CK18表达增高,而间质标志物Vimentin和N-cadherin表达降低。结论ET-1在鼻咽癌中可通过调控上皮间质转 化相关基因促进细胞增殖、迁移和侵袭能力。     

Wortmannin对胰腺癌细胞增殖和生存的影响

目的：观察Wortmannin对胰腺癌PANC-1、CFPAC-1细胞株增殖、凋亡的影响,探讨Wortmannin抗肿瘤的作用机制.方法：采用噻唑盐比色法（MTT）、平板克隆试验、流式细胞分析测定Wortmannin对PANC-1、CFPAC-1细胞增殖、凋亡的影响.结果：用不同浓度Wortmannin培养CFPAC-1细胞24、48、72 h后,其最大增殖抑制率分别为：10.6%、30.3%、18.9%（P＜0.05）,且呈明显的计量依赖效应,而Wortmannin对PANC-1细胞无明显抑制作用.Wortmannin可明显抑制CFPAC-1细胞克隆的形成（P＜0.01）,对PANC-1细胞克隆形成也有一定的抑制作用（P＜0.05）.但Wortmannin对两株细胞均无诱导凋亡的作用.结论：Wortmannin通过阻断PI3K/Akt信号通路抑制胰腺癌细胞株增殖,达到抗肿瘤的作用;不同的细胞系对Wortmannin的敏感性不同.     

PSMA7在胃癌中的表达及对胃癌增殖、侵袭迁移及成瘤能力的影响

目的研究PSMA7在胃癌中的表达及其对胃癌增殖、侵袭迁移及裸鼠皮下成瘤能力的影响。方法收集60例胃癌患者的 癌组织及配对的癌旁组织,应用免疫组化法检测胃癌和配对癌旁组织中PSMA7的表达水平;应用慢病毒转染技术在胃癌细胞 株SGC7901中干扰PSMA7;应用Cell Counting Kit-8（CCK-8）和细胞克隆形成实验检测胃癌细胞增殖能力的变化,Transwell实 验检测胃癌细胞侵袭迁移能力的变化;稳转细胞株构建裸鼠皮下移植瘤模型,研究干扰PSMA7对皮下移植瘤的影响。结果 免疫组化结果显示PSMA7在胃癌组织中的表达水平显著高于其配对的癌旁组织（P<0.05）;在人胃癌细胞株SGC7901中下调 PSMA7表达能够显著抑制肿瘤细胞的增殖、侵袭迁移能力（P<0.05）;在BALB/c小鼠皮下移植瘤模型中干扰PSMA7的表达能 够明显抑制皮下移植瘤的生长（P<0.05）。结论PSMA7在胃癌组织中高表达,干扰PSMA7抑制胃癌细胞增殖、侵袭迁移及裸 鼠皮下成瘤的能力。     

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     

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…     

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.     

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.