非修饰性寡核苷酸芯片用于HLA-DQA分型的初步研究

利用非修饰寡核苷酸基因芯片技术,根据HLAⅡ类抗原DQA位点不同基因亚型的特异性序列设计探针,制成分型芯片;待测样本经PCR反应标记上荧光之后,与探针在芯片上进行杂交,根据杂交产生的荧光信号值,确定样品DQA位点基因亚型。将这一方法应用于125例临床样本和10例标准品的HLA-DQA分型,该方法分型的结果与准确结果相比,准确率达到93.3%。实验结果表明:非修饰性寡核苷酸芯片用于HLA-DQA分型技术可行。     

三种荧光标记法对寡核苷酸芯片杂交信号的影响

目的 观察标记引物法、随机渗入标记法、末端转移标记法三种荧光标记法对寡核苷酸芯片杂交信号的影响。方法 将淋球菌gyrA基因91位密码子突变型探针倍比稀释成终浓度为1000／μmol／L～0．25μmol／L的梯度浓度点样并制作寡核苷酸芯片，PCR扩增荧光标记包含gyrA基因突变的目的DNA片段，与芯片杂交，分别记录三种标记方法的杂交信号强度。结果 标记引物法的荧光信号最强，随机渗入标记法的荧光信号强度次之，其Cy5—duTP最佳浓度为0．1mmol／L(dTTP：Cy5—dUTP=10：1)，末端转移标记法反应时间在60min和120min时荧光信号值相近。点样的探针浓度达到31μmol／L，以上，荧光信号为平台期。结论 明确了三种荧光标记法对寡核苷酸芯片杂交信号的影响，有助于选择寡核苷酸芯片的荧光标记方法。     

荧光标记寡核苷酸探针检测变形链球菌

[目的]建立应用荧光标记寡核苷酸探针BC73快速检测变形链球菌的方法.[方法]应用流式细胞仪检测荧光标记寡核苷酸探针EUB338和BC73与模式菌株和牙菌斑样品荧光原位杂交后的荧光强度和荧光计数.[结果]荧光标记寡核苷酸探针BC73与变形链球菌S.mutans10449杂交的荧光强度7倍于S.mitis15914和E.coliK12.变形链球菌占牙菌斑中细菌总数的1.7%.[结论]荧光标记寡核苷酸探针BC73能特异性检测牙菌斑中的变形链球菌数.     

荧光标记寡核苷酸探针检测变形链球菌

【目的】建立应用荧光标记寡核苷酸探针BC73快速检测变形链球菌的方法。【方法】应用流式细胞仪检测荧光标记寡核苷酸探针EUB338和BC73与模式菌株和牙菌斑样品荧光原位杂交后的荧光强度和荧光计数。【结果】荧光标记寡核苷酸探针BC73与变形链球菌S．mutans，10449杂交的荧光强度7倍于S．mitis 15914和E.coli K12。变形链球菌占牙菌斑中细菌总数的1．7％。【结论】荧光标记寡核苷酸探针BC73能特异性检测牙菌斑中的变形链球菌数。     

梅毒螺旋体寡核苷酸芯片探针的设计及筛选

【目的】设计梅毒螺旋体寡核苷酸探针,筛选出适合芯片检测的高敏感性和特异性寡核苷酸探针。【方法】根据梅毒螺旋体特异基因设计寡核苷酸探针,人工合成探针后制备寡核苷酸芯片。提取梅毒螺旋体的DNA,采用通用引物联合标记法进行标记,标记样品与芯片杂交,用芯片扫描仪检测杂交结果。【结果】设计出23条50 mer梅毒螺旋体寡核苷酸探针。标记样品与芯片杂交部分探针有较强的杂交信号,并筛选出符合要求的9条梅毒螺旋体寡核苷酸探针。【结论】以上方法能设计和筛选出敏感性和特异性较高的梅毒螺旋体寡核苷酸探针,可用于制备梅毒螺旋体寡核苷酸芯片。     

基因芯片制作中长片段（70mers）寡核苷酸探针的合成与纯化

研究长片段（70mers）的寡核苷酸探针的合成与纯化。采用固相亚磷酰胺法合成长70mers的寡核苷酸片段，并通过改进的实验装置进行PAGE纯化和分析。结果表明此法能快速、高产率的制备可直接用于点样、长度为70mers的寡核苷酸探针．纯化后探针纯度高，满足基因芯片检测的制作要求。     

戊型肝炎病毒诊断基因芯片制备的初步研究

目的制备戊型肝炎病毒诊断基因芯片并进行杂交验证。方法利用Oligo6.0软件针对戊型肝炎病毒诊断基因保守区域设计多对寡核苷酸探针,用芯片点样仪将其按照阵列设计打印在玻片上制备成基因芯片。样品标记采用限制性显示技术,样品标记后进行杂交,进而在芯片扫描仪中对得到的探针数据进行分析并实验验证。结果芯片杂交后得到的探针荧光强度好,信噪比高,符合临床样品的基因亚型,RT-PCR验证后得到的电泳结果与芯片实验一致。结论实验设计并制备的寡核苷酸戊型肝炎病毒诊断芯片能用于戊肝的检测,为这项疾病的实验室诊断提供了一种快速平行的检测方法。     

痘苗病毒寡核苷酸检测芯片的设计及研制

目的对痘苗病毒进行寡核苷酸检测芯片的初步研究,为建立寡核苷酸芯片检测该类病毒提供初步研究依据。方法根据痘苗病毒特异基因设计寡核苷酸探针,人工合成探针后制备寡核苷酸芯片。在病毒感染的不同阶段提取病毒样品DNA及阴性样品DNA,采用限制性显示技术标记,标记样品与芯片杂交后,用Agilent芯片扫描仪检测杂交结果。结果芯片与病毒样品杂交有较强的杂交信号,而与阴性样品杂交除阳性探针外均无信号。结论病毒样品与阴性样品杂交信号区别明显,在病毒感染的各个时段也都有明显的杂交信号,反映了寡核苷酸芯片具有较高的特异性和灵敏度。     

HBV共价闭合环状DNA功能化纳米颗粒制备及鉴定

目的 制备HBV共价闭合环状DNA(cccDNA)功能化磁性纳米颗粒,为进一步建立富集分离和检测cccDNA方法奠定基础. 方法 通过亲和素修饰纳米颗粒表面,利用亲和素与生物素的亲和作用,将亲和素修饰的纳米颗粒与生物素标记的cccDNA特异性探针偶联,制备cccDNA功能化纳米颗粒,最后用cccDNA探针完全互补的荧光标记序列与功能化纳米颗粒反应,鉴定其特性. 结果 亲和素修饰的纳米颗粒能结合生物素最大量为1 205 ng/mg;通过与亲和素作用,生物素标记cccDNA特异性探针固定在磁性纳米微粒表面,其最大结合生物素标记探针量为3.2×10-9 mol/mg;cccDNA功能化纳米颗粒可捕获与其互补的荧光标记寡核苷酸序列,其最大捕获量为2.0×10-9mol/mg,并能通过变性释放出保持生物学活性游离的荧光标记寡核苷酸序列. 结论 成功构建的cccDNA功能化纳米微粒能有效捕获与其互补的序列,其捕获量能达到cccDNA的分离提取要求.     

痘苗病毒寡核苷酸检测芯片的设计及研制

目的 对痘苗病毒进行寡核苷酸检测芯片的初步研究，为建立寡核苷酸芯片检测该类病毒提供初步研究依据。方法 根据痘苗病毒特异基因设计寡核苷酸探针，人工合成探针后制备寡核苷酸芯片。在病毒感染的不同阶段提取病毒样品DNA及阴性样品DNA，采用限制性显示技术标记，标记样品与芯片杂交后，用Agilent芯片扫描仪检测杂交结果。结果 芯片与病毒样品杂交有较强的杂交信号，而与阴性样品杂交除阳性探针外均无信号。结论 病毒样品与阴性样品杂交信号区别明显，在病毒感染的各个时段也都有明显的杂交信号，反映了寡核苷酸芯片具有较高的特异性和灵敏度。     

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…     

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.