白血病细胞雌激素受体α启动子CpG 岛甲基化状态的实验研究

目的 检测3种白血病细胞Jurkat、Molt-4、HL-60的雌激素受体α(estrogen receptorα,ERα)基因启动子ERα-A、ERα-B CpG岛甲基化状态,初步探讨ERα启动子区的甲基化状态以及与白血病发病机制的可能联系.方法 应用甲基化特异性PCR技术(MSP)检测3种白血病细胞株与正常人外周血单个核细胞ERα启动子区ERα-A 和ERα-B启动子区CpG岛甲基化状态.结果 白血病细胞株ERα-A 和ERα-B均出现甲基化条带,为全甲基化状态;正常人外周血单个核细胞ERα-A 和ERα-B CpG岛呈现非甲基化状态.结论 ERα基因启动子ERα-A 和ERα-B CpG岛的甲基化状态有可能成为白血病新的分子诊断标记物.     

乳腺癌雌激素受体α基因启动子甲基化与其蛋白表达的关系

目的：检测乳腺癌雌激素受体α（estrogen receptor α,ERα）基因启动子区CpG岛甲基化状态,探讨乳腺癌ERα启动子甲基化与其蛋白表达及临床病理的关系。方法：采用免疫组化EnVisionTM二步法检测20例正常乳腺组织、44例乳腺癌组织ERα基因的表达,同时运用甲基化特异性PCR（Methylation-Specific PCR,MSP）及测序法分别检测ERα基因启动子A区和B区CpG岛的甲基化状态。结果：32例ERα阳性乳腺癌组织中,ERα启动子A区、B区甲基化率分别为28.2%和18.8%。12例ERα阴性乳腺癌组织中,ERα启动子A区、B区甲基化率分别为66.7%和58.3%。ERα阳性乳腺癌组、ERα阴性乳腺癌组、乳腺癌组的ERα启动子A、B区甲基化率均较正常组显著增高（P〈0.05）;ERα阴性乳腺癌组的ERα启动子A、B区甲基化率较ERα阳性乳腺癌组均显著增高（P〈0.05）。乳腺癌组织ERα表达与启动子区甲基化之间呈显著负相关。结论：乳腺癌组织ERα基因表达沉默与其启动子A区、B区CpG岛甲基化相关,后者有可能成为乳腺癌预后不良的分子检测指标。     

白血病细胞雄激素受体基因启动子甲基化状态的研究

目的 检测白血病细胞雄激素受体基因启动子区CpG岛甲基化状态情况,初步探讨雄激素受体基因启动子区甲基化与白血病发病机制的可能联系.方法 应用甲基化特异性PCR技术(methylation specific PCR, MSP)检测3种白血病细胞株及15例患者骨髓标本雄激素受体基因甲基化状态.结果 白血病细胞株均出现甲基化和非甲基化带,呈部分甲基化状态,而作为对照的正常人白细胞均只出现非甲基化带.15例白血病患者全部检出甲基化状态. 结论 白血病细胞的雄激素受体基因启动子区存在高甲基化现象,可能为白血病的致病机制分析提供了一个新的方向,提示AR基因启动子CPG岛的甲基化有可能成为白血病的新的参考标记物.     

肼苯哒嗪对人乳腺癌细胞株MDA-MB-231雌激素受体α去甲基化的影响

目的探讨肼苯哒嗪对雌激素受体（ER）α阴性人乳腺癌细胞株MDA—MB-231ERα基因启动子区CpG岛DNA甲基化的影响。方法体外细胞培养,按药物浓度分为4组：分别用0、5、10、20μmol／L的肼苯哒嗪作用ERa阴性人乳腺癌细胞株MDA—MB-231细胞96h;按药物作用时间分为4组：分别于0、72、96、120h10μmol／L肼苯哒嗪作用ERn阴性人乳腺癌细胞株MDA—MB-231细胞,倒置光学显微镜下观察肼苯哒嗪对细胞生长的影响。各组提取MDA—MB-231细胞总RNA,用RT-PCR及图像分析检测肼苯哒嗪对MDA—MB-231细胞ERamRNA表达的影响;提取MDA—MB-231细胞基因组DNA,纯化、修饰后用甲基化特异性聚合酶链反应（MSP）检测乳腺癌细胞株MDA-MB-231ERa基因启动子区CpG岛DNA甲基化状态。结果与对照组比较,5、10、20μmol／L肼苯哒嗪组ER／β-actin光密度积分值比值均明显升高（P〈0．05或P〈0．01）;72、96、120h10μmol／L肼苯哒嗪组ER／β-actin光密度积分值比值均明显升高（P〈0．05或P〈0．01）。5μmol／L肼苯哒嗪作用120h后ERa基因呈部分去甲基化状态,而经10μmol／L肼苯哒嗪作用120h后的ERα基因呈完全去甲基化状态。结论肼苯哒嗪可以逆转ERα阴性人乳腺癌细胞株MDA-MB-231ERα基因启动子区CpG岛DNA甲基化状态,使沉默基因重新表达。     

SOX7基因在胰腺癌细胞株的表达及其启动子区甲基化状态的研究

目的:检测SOX7基因在胰腺癌细胞株中的表达及其启动子区的甲基化状态,初步探讨两者之间的关系?方法:采用RT-PCR检测SOX7基因在胰腺癌细胞株BXPC-3?CFPAC-1?PANC-1和SW1990中的表达水平?重亚硫酸盐测序PCR(bisulfite sequencing PCR,BSP)和结合重亚硫酸盐的限制性内切酶法 (combined bisulfite restriction analysis,COBRA)检测启动子区域甲基化状态?采用去甲基化药物5-氮杂胞苷(5-aza-2-adeoxycytidine,5-aza-dC)处理各细胞株后,检测SOX7基因的mRNA表达和甲基化状态变化?结果:在胰腺癌细胞株BXPC-3?CFPAC-1中SOX7基因的mRNA呈阳性表达,而在PANC-1和SW1990中SOX7基因表达沉默;与BXPC-3?CFPAC-1相比,PANC-1和SW1990中SOX7基因启动子区甲基化率较高?经过去甲基化处理后,PANC-1与SW1990中SOX7启动子区的甲基化率下降,基因重新表达?结论:胰腺癌细胞株PANC-1和SW1990中的SOX7基因表达与启动子区甲基化状态有关,启动子区的高甲基化导致PANC-1? SW1990中SOX7基因的表达沉默?     

食管鳞状细胞癌中MT-3基因表达与启动子区CpG岛甲基化相关性

目的:使用启动子区CpG岛的甲基化特异性PCR(MSP),分析食管鳞状细胞癌中MT-3基因表达与启动子区CpG岛甲基化的相关性。方法:对MT-3基因启动子区的用MSP检测方法,并以DNA甲基转移酶(DNMT)抑制剂5-氮2'-脱氧胞(5-aza-CdR)分别处理食管鳞状细胞癌组织及HET-1A细胞株,检测MT-3基因启动子区甲基化状态变化,Western blot检测蛋白表达。结果:食管鳞状细胞癌组织中MT-3基因启动子区呈甲基化状态,HET-1A细胞株MT-3基因启动子区呈非甲基化状态。采用5'-Aza-dC去除食管鳞状细胞癌组织中MT-3基因启动子区甲基化后,金属硫蛋白3表达水平上升了9.2倍。结论:MT-3启动子区CpG岛甲基化可能是导致金属硫蛋白3低表达的重要机制,其结果则导致食管癌发生。     

胃癌细胞对TRAIL的敏感性与caspase-8基因甲基化状态的关系

目的探讨caspase-8基因启动子区5′CpG岛甲基化状态与TRAIL抗癌作用的关系.方法采用甲基化特异PCR方法检测5种胃癌细胞株caspase-8基因启动子区的甲基化状态;采用MTT方法检测TRAIL蛋白的抗癌活性.结果 5种胃癌细胞株对TRAIL的敏感性不尽相同,caspase-8基因启动子区均为非甲基化状态;5-Aza-CdR处理可提高耐药细胞对TRAIL的敏感性,但不影响胃癌细胞的甲基化状态.结论 5-Aza-CdR可提高多数胃癌细胞对TRAIL的敏感性,胃癌细胞对TRAIL的敏感性与caspase-8基因甲基化状态无关.     

5-氮-2'-脱氧胞苷及曲古抑菌素A对HT29人结肠癌细胞株ING1b基因启动子区域甲基化、组蛋白乙酰化及ING1bmRNA表达的影响

目的　探讨DNA5'CpG岛去甲基化和组蛋白去乙酰化对HT29人结肠癌细胞株ING1b基因启动子区域甲基化、组蛋白乙酰化及其mRNA表达的影响。方法　应用特异性DNA甲基转移酶（DNMTs）抑制剂5-氮-2'-脱氧胞苷（5-Aza-2'-dc,以下简称Aza）及组蛋白去乙酰化酶（HDACs）抑制剂曲古抑菌素A（TSA）作用人结肠癌细胞株HT29后,用甲基化特异性PCR(MSP)检测该ING1b基因核心启动子区域CpG岛甲基化情况,用染色质免疫沉淀(ChIP)检测其乙酰化组蛋白绑定的DNA情况,并用逆转录聚合酶链反应(RT-PCR)检测ING1bmRNA表达。结果　HT29人结肠癌细胞株ING1b基因核心启动子区域存在CpG岛半甲基化,且乙酰化水平低,mRNA表达水平低。经Aza及TSA干预后,ING1b基因核心启动子区域CpG岛转为非甲基化,其乙酰化水平增加,ING1bmRNA表达亦比对照组高。结论　HT29人结肠癌细胞株ING1b基因5端核心启动子甲基化及乙酰化可能是导致该基因表达沉默的主要原因,Aza逆转HT29人结肠癌细胞株ING1b基因异常甲基化,TSA能较好地提高其组蛋白乙酰化水平,并有效地激活因半甲基化所致ING1b基因沉默的再转录,诱导该基因表达,从而抑制肿瘤细胞生长。     

HCC患者GSTP1基因启动子区CpG岛甲基化状态研究

目的 检测人原发性肝癌（HCC）中抑癌基因GSTP1的启动子区CpG岛甲基化的状况，并探讨其在肝癌发生中的作用。方法 以已知的GSTP1基因启动子区CpG岛甲基化阳性的乳腺癌细胞株MCF-7为阳性对照，以11例正常人外周血单核细胞（PBMC）DNA为阴性对照，用甲基化特异性PCR（MSP）的方法对26例肝细胞癌患者的癌、远癌组织中GSTP1基因启动子区CpG岛甲基化的状态进行检测。结果 在26例原发性肝癌中GSTP1基因启动子区CpG岛甲基化在癌组织为88％（23／26），在远癌组织中为69％（18／26）；而在11例正常人外周血单核细胞均为甲基化阴性。结论 抑癌基因GSTP1基因启动子区CpG岛高甲基化可能是肝癌发生早期的分子事件，在人原发性肝癌的发生发展中具有重要的作用。     

3种胃癌细胞株中GSTP1基因表达及其启动子区甲基化状态的研究

目的研究候选基因GSTP1在胃癌细胞株中的表达及其启动子区的甲基化状态,初步探讨胃癌细胞株GSTP1基因表达水平与其启动子区甲基化的相关性。方法采用RT-PCR和Western blot技术分别检测GSTP1在人胃癌细胞株MGC803、BGC823和SGC7901中的mRNA和蛋白表达水平。甲基化特异性PCR(MSP)法检测启动子区域甲基化状态。分别用不同浓度的去甲基化药物5-氮杂胞苷处理GSTP1基因启动子区高甲基化状态细胞后,再检测GSTP1基因蛋白表达水平。结果人胃癌细胞株BGC823和SGC7901中GSTP1 mRNA和蛋白呈阳性表达,MGC803中mRNA和蛋白呈阴性表达;BGC823和SGC7901细胞GSTP1基因启动子区域未发生甲基化,而MGC803细胞启动子区呈高甲基化状态;经5-氮杂胞苷药物干预后,MGC803细胞的GSTP1蛋白表达明显增强。结论胃癌MGC803细胞株中GSTP1基因表达沉默与启动子区高甲基化状态有关。     

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…     

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.     

Dr.Zhang Ren's Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.