环丙氧苷诱导转导有外源HSV-tk基因的C6胶质瘤细胞的凋亡

目的　观察单纯疱疹病毒胸苷激酶基因 (HSV - tk) -环丙氧苷 (GCV )系统在胶质瘤基因治疗过程中 ,GCV能否诱导转导有 HSV- tk基因的胶质瘤细胞凋亡。方法　采用光镜、电镜和荧光显微镜观察转导有 HSV- tk基因的大鼠 C6 /tk胶质瘤细胞形态学的改变 ,以未转导 HSV- tk基因的 C6细胞作为对照 ,并以流式细胞术、DNA凝胶电泳分析进一步验证细胞凋亡的发生。结果　在 5μg/ml GCV作用 72 h后 ,C6 /tk细胞呈现凋亡状态。光镜和电镜下可见细胞皱缩 ,染色质浓集贴边 ;荧光显微镜下可见染色质浓集、断裂 ;DNA凝胶电泳可见 DNA呈梯状带型 ;流式细胞术分析显示有凋亡峰出现 ,凋亡细胞占 2 3%。对照组未见有细胞凋亡现象。结论　 GCV能诱导转导有 HSV- tk基因的 C6 /tk细胞凋亡 ,以上结果为胶质瘤基因治疗的研究提供依据     

紫杉醇诱导胶质瘤细胞凋亡的体内外实验研究

目的：通过体内、外实验探讨抗癌新药紫杉醇有否诱导胶质瘤细胞凋亡的作用。方法：应用ＭＴＴ比色法、培养细胞ＨＥ染色、琼脂糖凝胶电泳、流式细胞仪观察到多行性胶质母细胞瘤ＢＴ３２５株在紫杉醇作用下发生凋亡，将其作用于小鼠胶质瘤细胞Ｇ４２２动物模型，计算抑瘤率、观察瘤细胞形态及分析ＤＮＡ片段。结果：ＢＴ３２５细胞在紫杉醇作用下，细胞生长被明显抑制，细胞分裂阻滞在Ｇ０／Ｇ１期并诱导细胞发生凋亡，具有典型的凋亡细胞形态学特征；小鼠皮下Ｇ４２２胶质瘤在紫杉醇作用下肿瘤抑制率明显增加，细胞形态学表现及琼脂糖凝胶电泳证实其与诱导细胞凋亡有关。结论：紫杉醇具有明显的抗胶质瘤作用     

紫杉醇抗人脑多形性胶质母细胞瘤BT325株实验研究

目的：通过体外实验探讨紫杉醇有否抗人脑恶性胶质瘤作用。方法：首先用ＭＴＴ法检测紫杉醇对胶质母细胞瘤ＢＴ３２５株具有明显的细胞毒作用。进一步通过形态学观察及流式细胞仪来证实紫杉醇可诱导ＢＴ３２５细胞凋亡。结果：ＢＴ３２５细胞在紫杉醇作用下,细胞生长被明显抑制;细胞分裂阻滞在Ｇ０／Ｇ１期,出现凋亡峰;具有典型的凋亡细胞形态学特征。结论：紫杉醇具有明显的抗人脑胶质瘤作用,其作用机制与诱导细胞凋亡有关。     

胃液、稀盐酸、阿霉素对BIU-87细胞系细胞凋亡的影响

目的 :探讨胃代膀胱术抑制膀胱肿瘤复发的机制。方法 :采用HE染色、荧光染色、DNA电泳、流式细胞术等技术 ,观察了胃液、稀盐酸、阿霉素对膀胱癌细胞系BIU 87细胞凋亡的影响。结果 :发现胃液能诱导体外培养的膀胱癌细胞凋亡 ,细胞形态学观察凋亡细胞数增多 ,DNA电泳出现梯状电泳带 ,流式细胞术可见凋亡峰 ,胃液组细胞凋亡率为 8.0 9% ,与阿霉素组 (4 2 .74% )和无药培养液组 (6 .71% )比较差异有高度显著性 (P <0 .0 1) ,与稀盐酸组 (7.2 6 % )比较差异无显著性 (P >0 .0 5 )。结论 :胃液作为一种诱导膀胱癌细胞系细胞凋亡的因子 ,可能在胃代膀胱术中起到抑制膀胱肿瘤复发的作用。     

苦参碱对BT325胶质瘤细胞的增殖抑制和诱导凋亡作用

目的　观察苦参碱对人胶质瘤细胞株BT32 5体外增殖的影响 .方法　应用MTT比色法检测不同浓度苦参碱对BT32 5细胞的增殖抑制 ,应用流式细胞仪观察苦参碱对BT32 5细胞周期的影响 ,采用透射电镜观察瘤细胞形态学改变 .结果　苦参碱对BT32 5细胞增殖抑制作用呈剂量依赖性 ,当浓度为 0 5g·L- 1 时 ,对BT32 5增殖的抑制率最大 ,达到 (32 1±1 1) % .流式细胞仪分析显示 ,用 0 5g·L- 1 苦参碱培养 72h ,BT32 5细胞出现典型凋亡峰 ,凋亡细胞占细胞总数 2 3 9% .透射电镜观察 ,发现有凋亡细胞存在 ,表现为细胞皱缩 ,染色质边集 .结论　苦参碱对人胶质瘤细胞系BT32 5的增殖具有明显的抑制作用 ,并能诱导其发生凋亡 .     

人参皂甙Rh_2对C_6胶质瘤细胞的增殖抑制和诱导凋亡作用

目的 :观察人参皂甙 Rh2 对 C6胶质瘤细胞的增殖抑制和诱导凋亡作用 ,并在分子水平探讨其作用机理。方法 :细胞计数法检测细胞增殖 ,流式细胞仪分析细胞周期和凋亡。结果 :1 Rh2 2 ,4,8μmol/L对 C6胶质瘤细胞有增殖抑制作用 ,且呈明显量效关系 ;2 Rh2 作用 72 h后 ,4μmol/L浓度对 C6胶质瘤细胞诱导凋亡作用最为明显 ;3 Rh2 作用后 ,G0 /G1期细胞百分率明显下降 ,而S期细胞百分率显著增加。结论 :Rh2 对 C6胶质瘤细胞有明显的增殖抑制和诱导凋亡作用 ,且这种作用有周期特异性。     

冬凌草甲素诱导C6脑胶质瘤细胞凋亡的初步研究

目的:研究冬凌草甲素对大鼠C6脑胶质瘤细胞的抑制增殖及诱导凋亡的作用。方法:不同浓度的冬凌草甲素在不同的时间间隔内作用于C6脑胶质瘤细胞,用冬凌草甲素浓度时间生存曲线来测试冬凌草甲素对C6脑胶质瘤细胞的作用。用流式细胞技术来分析细胞周期的分布情况及凋亡细胞的百分数。结果:生存曲线结果证实冬凌草甲素诱导增殖抑制呈浓度依赖和时间依赖。Hochest 33258斑点染色及流式细胞技术揭示冬凌草甲素诱导C6脑胶质瘤细胞凋亡及抑制其进入细胞周期的G2/M相。结论:冬凌草甲素能够抑制C6脑胶质瘤细胞增殖,诱导细胞凋亡。     

蛋白酶体抑制剂MG-132对体外C6胶质瘤细胞的增殖抑制及诱导凋亡作用

目的：探讨蛋白酶体抑制剂MG-132对大鼠C6胶质瘤细胞体外增殖抑制和诱导凋亡作用。方法：分别以不同浓度（10、20和50 μmol•L^-1）的MG-132培养C6胶质瘤细胞,通过MTT法检测不同培养时间细胞增殖活力,流式细胞术检测细胞凋亡率,HE染色、AO/EB染色以及透射电镜观察细胞形态学变化。结果：MTT法检测显示10 μmol•L^-1MG-132作用于C6胶质瘤细胞24、48和72 h后,细胞增殖A值(0.46±0.03、0.48±0.03和0.45±0.02)均显著低于正常对照组（P<0.01）,且随浓度增加其抑制作用逐渐增强;10μmol•L^-1 MG-132作用C6胶质瘤细胞12 h后即可经流式细胞仪检测到明显的凋亡亚二倍体峰,以不同药物浓度（10、20和50 μmol•L^-1）处理C6胶质瘤细胞12 、24 和48 h后其细胞凋亡率均显著高于正常对照组（P<0.01）;形态学检查呈现凋亡细胞的特征。结论：蛋白酶体抑制剂MG-132在体外可显著抑制大鼠C6胶质瘤细胞增殖并诱导其发生凋亡。     

P73基因在长春新碱诱导髓性白血病细胞系U937细胞凋亡过程中的表达

目的 :探讨长春新碱诱导U937细胞凋亡过程中P73mRNA的表达变化 ,以进一步了解P73基因在U937细胞凋亡中的作用。方法 :用长春新碱诱导U937细胞凋亡 ,凋亡指标采用细胞形态学、DNA片段电泳、流式细胞术检测DNA含量等方法 ;采用半定量逆转录PCR(RT -PCR)检测P73mRNA的表达变化。结果 :长春新碱可诱导U937细胞凋亡。 2 0 μg/ml的长春新碱使用于U937细胞 1 8h ,光镜下见细胞明显聚集、体积缩小 ,荧光染色见染色质明显浓缩、核碎裂等现象 ,而对照组未出现上述现象 ;DNA片段电泳见清晰的梯形条带 ;流式细胞仪检测 :长春新碱作用于U937细胞 1 8h ,2 4h ,细胞的凋亡率分别为 1 0 .54 %、35 .1 5 % ,而对照组的凋亡率仅为 0 .93 % ;半定量RT -PCR结果 :在U937细胞凋亡前后 ,P73mRNA的表达差异无显著性。结论 :在U937细胞凋亡过程中P73的mRNA表达差异无统计学意义     

蛋白酶体抑制剂MG-132对体外人U87胶质瘤细胞增殖和凋亡的影响

目的 探讨蛋白酶体抑制剂MG-132对体外人U87胶质瘤细胞增殖和凋亡的影响.方法 分别以不同浓度(0、2.5、5、10和20μmoL/L)的MG-132培养U87胶质瘤细胞,通过四甲基偶氮唑蓝(MTT)法检测不同培养时间(12、24、48、72 h)对U87胶质瘤细胞增殖的影响,流式细胞仪分析MG-132对U87胶质瘤细胞凋亡的影响,HE染色观察细胞形态学变化.结果 通过与正常对照组比较,2.5～20μmoL/L浓度的MG.132在12、24、48及72 h均可抑制U87细胞增殖并诱导其凋亡,并在一定范围内呈时间和剂量依赖性;各亚组与对照组差异具有统计学意义(P<0.05);形态学检查呈现凋亡细胞的特征.结论 MG-132可抑制U87胶质瘤细胞增殖并诱导其凋亡,在一定范围内呈时间和剂量依赖性.     

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.