大鼠心室肌肾上腺素受体α1A亚型激活使动作电位时程延长

以心肌细胞动作电位参数的变化为指标，以α１－肾上腺素受体亚型激动剂和选择性阻断剂为工具药，研究α１－ＡＲ亚型对大鼠心肌细胞ＡＰ的影响，结果表明，α１－ＡＲ激动剂苯肾上腺素１０＾０７ｍｏｌ／Ｌ使动作电位时程显著延长，ＰＥ１０＾－５ｍｏｌ／Ｌ使动作电位时程比对照值延长５９．９％，ＷＢ４１０１和５－ＵＰ在１０＾０９ｍｏｌ／Ｌ浓度能有效地阻断ＰＥ１０＾－７ｍｏｌ／Ｌ的作用。     

碘盐中微量碘的直接电位分析

采用改进的离子选择性电极技术直接测定了碘盐中的微量碘。在０．５０ｍｏｌ／ＬＮＡｃＬ－０．０１ｍｏｌ／ＬＶｃ介质中，由ＫＩ或ＫＩＯ３碘化的食盐含碘量可以采用标准曲线法直接分析，不需要氯碘分离，Ｃｌ＾－的干扰作用被校正。碘盐分析的相对标准偏差和回收率分别是１．８％和１０５．９％，模拟碘盐分析的平均相对误差值为５．２％。     

催化光度法测定碘盐中的微量碘

建立测量微量碘的新方法。方法以三价铁化孔雀绿使其褪色为指示反应，碘离子对其有催化作用，吸光度的降低与碘离子浓度成正比。结果方法的线性范围为０．７μｍｏｌ／Ｌ，检出限为１．９×１０－７ｍｏｌ／Ｌ。结论该方法用于碘盐中微量碘的测定，结果满意。     

催化光度法测定痕量碘的研究

研究稀磷酸介质中碘离子（Ｉ＾－）催化高碘酸钠氧化结晶紫的褪色反应,并根据碘离子灵敏的催化特性,建立了一种测定痕量碘的新方法。该法测定灵敏度７．６＊１０＾－９ｇ／ｍｌ．Ｉ＾－,线性范围为０．１０－５．５μｇ／１０ｍｌ。该法选择性好,操作简便,用本法测定食盐和饮用水样品中的碘含量,测定结果的相对标准偏差小于４．４％,加标平均回收率为９５．６％。     

SKF38393对DRG神经元GABA—激活电流的抑制

在大鼠新癣分离ＤＲＧ神经元标本上应用全细胞膜片作记录，观察了多巴胺Ｄ１受体的选择性激动剂（±）ＳＫＦ３８３９３ＨＣＩ对ＧＡＢＡ－激活电流的作用，大部分受检细胞（６０／７０）对ＧＡＢＡ敏感。１０＾－６～１０＾－３ｍｏｌ／ＬＧＡＢＡ可引起呈剂量依赖性的明显去敏感作用的内向电流，在６０个对ＧＡＢＡ敏感的细胞中，预加ＳＫＦ３８３９３引起的膜反应如下：（１）外向电流（７／６０），（２）内向电流（５／６０），     

亚硝基聚吡咯修饰离子选择性电极的制备及化学性能

用循环伏安法（ＣＶ）制备了聚吡咯亚硝酸根离子选择性电极。表征了电极的性能。在１０－１～５×１０－５ｍｏｌ／Ｌ浓度范围内电极电位与亚硝酸根离子浓度成良好的线性关系，斜率５１ｍＶ／ＰＮＯ－２。观察了ＮＯ－２在ＰＰｙ膜中掺杂－去掺杂过程，从而验证了电极响应是基于掺杂机理。     

内皮素－1诱导肺动脉平滑肌细胞的趋化反应

本实验发现ＥＴ－１可诱导肺动脉平滑肌细胞（ＰＡＳＭＣ）的趋化反应，１０~（－１２）～１０~（－９）ｍｏｌ／ＬＥＴ－１可剂量依赖地促进ＰＡＳＭＣ的趋化反应，而高浓度的ＥＴ－１（１０~（－８）～１０~（－６）ｍｏｌ／Ｌ）对ＰＡＳＭＣ的趋化作用减弱，内皮素Ａ型受体的特异拮抗剂ＢＱ１２３可抑制ＰＡＳＭＣ对ＥＴ－１的趋化反应，此外还观察到缺氧可促进ＰＡＳＭＣ对ＥＴ－１的趋化反应。提示ＥＴ－１可能对缺氧性肺血管结构重组中平滑肌细胞及其前体的迁移具有重要作用。     

三种阿片肽对体外培养大鼠胰岛胰岛素释放的影响

目的：观察不同浓度的３种阿片肽对体外孵育胰岛分泌胰岛素的影响。方法：大鼠胰岛培养中分别加入１０＾－１５，１０＾－１２，１０＾－９，１０＾－６ｍｏｌ／Ｌ４种浓度的β内啡肽（β－ＥＰ）、亮啡肽（Ｌ－ＥＫ）和强啡肽Ａ１－１３（ＤｙｎＡ１－１３）。结果：３种阿片肽都能刺激胰岛素分泌。高浓度（１０＾－６ｍｏｌ／Ｌ）β－ＥＰ和ＤｙｎＡ１－１３相对于低浓度（１０＾－１５ｍｏｌ／Ｌ）胰岛素分泌反而减少，但仍高于正     

几种受体激动剂对IFN—γ诱导人单核细胞HLA—DR抗原表达的影响

用细胞体外培养的方法，探讨了几种受体激动剂对人体外周血单核细胞ＨＬＡ－ＤＲ抗原表达的影响。结果显示：１．去甲肾上腺素对ＩＦＮ－γ诱导ＨＬＡ－ＤＲ抗原表达具有双向调节作用。１０＾１２，１０＾－１０ｍｏｌ／Ｌ ＮＡ具有促进作用；＾１０－６，１０＾－４ｍｏｌ／ＬＡ呈现抑制作用。     

急性非淋巴细胞白血病N—ras基因突变的研究

探讨Ｎ－ｒａｓ基因突变在急性非淋巴细胞白血病中的作用及其意义。用途聚合酶链反应－单链构像多态分析法检测３５例ＡＮＬＬ患者Ｎ－ｒａｓ基因突变。初发ＡＮＬＬ４／１５例，复发ＡＮＮＬＬ３／１０例，缓解ＡＮＬＬ／１／１０例有Ｎ－ｒａｓ基因突变。Ｎ－ｒａｓ基因突变与ＡＮＬＬ发生和发展有一定相关性。     

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     

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.