戈米辛J对氧自由基的作用

目的 研究戈米辛Ｊ（ｇｏｍｉｓｉｎ Ｊ）对氧自由基的作用。方法 采用黄嘌呤／黄嘌呤氧化酶－鲁米诺体系和邻苯三酚自氧人体系产生的化学发光检测超氧阴离子自由基，采用Ｆｅｎｔｏｎ发光体系检测羟自由基。结果 戈米辛Ｊ能抑制３的化学发光，对以上３种体系的ＩＣ５０、ＩＣ２０及ＩＣ５０（９５％可信限）依次分别为２３７．７（１５５．５～３６３．３）、１００．８（８８．１～１１５．３）和１．８６（１．６０～２．１６     

三种天然抗氧化剂清除自由基作用的研究

目的:比较3种天然抗氧化剂(茶多酚、银杏提取物和竹叶提取物)清除自由基的作用.方法:生物化学发光法(CuSO4-Vc-H2O2-酵母悬浮液体系化学发光检测法和次黄嘌呤-黄嘌呤氧化酶-鲁米诺体系化学发光检测法).结果:茶多酚(TP)、银杏提取物(EGb)、竹叶提取物(EBI)均具有清除OH-、O2-自由基的作用.TP、EGb、EBI清除O2-的IC50分别为3.09,3.425,3.593μg/ml.结论:3种天然抗氧化剂清除自由基能力茶多酚最强,银杏提取物次之,竹叶提取物相对最弱.     

冬凌草甲素对活性氧自由基的清除作用(英文)

目的：研究冬凌草甲素对不同模型系统产生的活性氧自由基的清除作用。方法：自由基检测用电子自旋共振自由基旋捕集技术和化学发光法。结果：二种方法检测均发现Ｏｒｉｄ明显清除黄嘌呤／黄嘌呤氧化酶系统产生的超氧自由基（Ｏ－２）以及Ｆｅｎｔｏｎ反应中的羟自由基（·ＯＨ）．Ｏｒｉｄ１７０ｍｏｌ／Ｌ对Ｏ－２和·ＯＨ的清除率分别为４９４％和７５２％。Ｏｒｉｄ对多形核白细胞（ＰＭＮ）呼吸爆发时产生活性氧自由基同样显示明显清除作用。在本实验条件下,Ｏｒｉｄ并不影响ＰＭＮ呼吸爆发时的氧消耗。结论：Ｏｒｉｄ可能是一个抗氧化剂。     

鬼箭羽三种提取物对氧自由基作用的影响

目的观察鬼箭羽(Euonymus Alatus,EA)主要提取物对氧自由基的影响.方法从鬼箭羽中分离出总黄酮(Total Flavonolds of Euonymus Alatus,TFEA)、总甾体(Total Steroids of Euonymus Alatus,TSEA)和总多糖(Total Polysaccharide of Euonymus Alatus,TPEA),利用黄嘌呤/黄嘌呤氧化酶(Xanthine/Xanthine oxidase,Xan/XO)和多形核白细胞(Polymorphonuclear leaukocytes.PMN)呼吸爆发介导鲁米诺化学发光(Chemluminesence,CL)体系H2O2诱导大鼠肝匀浆脂质过氧化体系进行实验,观察3种成分对氧自由基作用的影响.结果 TFEA和TSEA有良好的清除氧自由基作用,其中TFEA效果最好,TSEA次之.结论鬼箭羽提取物具有抗氧化作用,其主要成分是TFEA、TSEA和TPEA.     

刺五加注射液清除活性氧能力

一种具有较强清除活性氧能力的中药制剂—刺五加注射液,用黄嘌呤-黄嘌呤氧化酶体系产生超氧阴离子自由基、用Fenton反应产生羟自由基。以磁共振方法和自旋捕集技术,观察了刺五加注射液对上述活性氧自由基的清除能力。实验表明:在高倍稀释情况下,刺五加注射液对羟自由基的清除率为63％,对超氧阴离子的清除率为64％。清除具有细胞毒性的活性氧自由基的能力也许就是该中药制剂重要药理机制之一。     

沙棘总黄酮对活性氧自由基的清除作用

用 ESR 自旋捕集技术研究沙棘黄酮(TFH)对活性氧自由基(AOR)的清除作用,并用化学发光(CL)法测定该药对多形核白细胞(PMN)产生 CL 的影响.证明1.7mg/L TFH 对 PMA 刺激 PMN 生成的AOR 有明显清除作用;TFH(0.03～3ml/L)对黄嘌呤/黄嘌呤氧化酶系统生成的 O_2~-有显著剂量依赖性     

7种治疗心血管疾病的中成药抗氧自由基作用的研究

利用黄嘌呤/黄嘌呤氧化酶体系或碱性二甲基亚砜生成的O_2~.与鲁米诺作用的化学发光体系,研究7种中成药水提物抗氧自由基的作用。结果表明:7种中成药水提物对酶体系产生的O_2~.都有抑制作用,其中3种对非酶体系产生的O_2~.有抑制作用,而另4种则表现出负的抑制作用。     

利用化学发光法研究生脉饮的自由基清除作用

现代医学药理研究证明生脉饮药理作用主要有:抗炎,解毒,提高免疫,抗肿瘤作用^[1].现已公认自由基可攻击DNA分子,诱发突变,导致细胞癌变^[2].生脉饮如果能有效地清除活性氧自由基,或许是其抗肿瘤重要药理机制之一.为此,本文利用黄嘌呤/黄嘌呤氧化酶体系化学发光法^[3]测定其清除氧自由基(O₂^-)能力.     

葛仙米藻红蛋白的体外抗氧化活性作用研究

目的 本研究旨在研究葛仙米藻红蛋白的体外抗氧化活性作用.方法 本试验采用化学发光方法研究了葛仙米藻红蛋白对·OH自由基、O 2-自由基、H2O2自由基等氧自由基的清除作用.结果 葛仙米藻红蛋白对·OH自由基、O2-自由基、H 2O2自由基具有一定的清除作用,其IC50分别为89μg/ml、130μg/ml、48μg/ml,说明葛仙米藻红蛋白对H 2O2自由基的清除作用最强 .结论 葛仙米藻红蛋白具有较强的清除氧自由基的能力,表明葛仙米可作为研究开发新型抗氧化剂产品的研究对象.     

不同提取法对广金钱草总黄酮抗氧化活性的影响研究

目的研究不同提取法对广金钱草总黄酮提取物体外抗氧化活性的影响。方法以乙醇为溶剂采用回流法和超声法提取广金钱草总黄酮,并对两种提取法所得提取物进行一系列体外抗氧化活性的测定。结果回流法提取物清除DPPH自由基、超氧自由基和羟基自由基的IC50值分别为0.037mg/ml、0.034mg/ml和0.034mg/ml。超声法提取物清除DPPH自由基、超氧自由基和羟基自由基的IC50值分别为0.041mg/ml、0.050mg/ml和0.036mg/ml。结论用回流法和超声法提取广金钱草总黄酮具有良好的抗氧化性和清除自由基的作用,但回流提取法提取物的抗氧化性和清除自由基的作用较超声法强。     

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.