缺氧对血管内皮生长因子诱导主动脉内皮细胞通透性增加的调控研究

目的 :为了解缺氧对血管内皮生长因子 (VEGF)增强血管内皮细胞通透性作用的影响 ,考察正常和缺氧状态下VEGF对体外培养牛主动脉内皮细胞 (BAEC)脂蛋白通透性的影响及银杏叶提取物 (Egb76 1)的抑制作用。方法 :将VEGF及Egb76 1加入BAEC共孵育 ,用SN 6 95型液闪计数器测 [12 5I]氧化低密度脂蛋白( [12 5I]OxLDL)通过BAEC的百分率。结果 :VEGF可显著增强BAEC对 [12 5I]OxLDL的通透性 (P <0 .0 1) ,这种增加具有浓度依赖性。缺氧 3h可促进VEGF所致的的通透性增加。Egb76 1能显著抑制VEGF诱导的通透性升高 (P <0 .0 1)。结论 :VEGF在动脉粥样硬化的形成和发展过程中起一定作用。Egb76 1对VEGF诱导血管内皮通透性升高有显著的抑制作用。     

Naloxone or Vagotomy Does Not Influence Centrally Octreotide-induced Inhibition of Gastric Acid Secretion in Rats

Octreotide is a long-acting somatostatin analogue with the similar bioactivity as somatostatin. It is clinically employed in the treatment of acromegaly, stress ulcer hemorrhage and other conditions[1]. In the basic research on the central effect of octreotide on gastric acid secre- tion there are few literatures available up to now. More- over, the outcome (stimulation or inhibition of gastric acid secretion) and the underlying mechanisms vary due to differences in routs of drug administratio…     

Immunization using autologous dendritic cells pulsed with the melanoma-associated antigen gp100-derived G280-9V peptide elicits CD8+ immunity.

PURPOSE: To determine the toxicity, maximal tolerated dose, and clinical and immunologic response to autologous dendritic cells pulsed with melanoma-associated antigen gp100-derived G280-9V peptide. PATIENTS AND METHODS: Twelve HLA-A*0201(+) patients with advanced melanoma were administered dendritic cells pulsed with G280-9V peptide. Cohorts of three patients were administered 5 x 10(6), 15 x 10(6), and 50 x 10(6) cells i.v. every 3 weeks for six doses according to a dose escalation scheme. Three additional patients were treated at the highest dose. No additional cytokines or therapies were coadministered. The immunogenicity of G280-9V-pulsed dendritic cells was measured by IFN-gamma ELISPOT assay, tetramer assay, and (51)Cr release assay comparing prevaccination to postvaccination blood samples. Response to treatment was assessed by Response Evaluation Criteria in Solid Tumors. RESULTS: CD8(+) immunity to the native G280 was observed in 8 (67%) patients as measured by ELISPOT and in 12 (100%) patients as measured by tetramer assay. Of the 9 patients tested, 9 (100%) had measurable high-avidity CTL activity as defined by lysis of allogeneic melanoma lines, which coexpress HLA-A*0201 and gp100. The median follow-up of the entire cohort is 43.8 months. Two (17%) partial responses were observed and 3 (25%) patients had stable disease. The median survival of the treated population was 37.6 months. At this time, three patients are alive, including one patient who continues to respond without additional treatment. CONCLUSION: The high rate of immunization as measured by three independent assays and the occurrence of clinical regression support continued investigation of G280-9V peptide as a candidate epitope in melanoma vaccine formulations.     

祛痰活血止眩汤治疗椎-基底动脉供血不足性眩晕120例

椎-基底动脉供血不足（Verteral Basilarartery Insufficiency VBI）性眩晕是一种常见的神经系统病症,临床表现以发作性眩晕、恶心欲吐、共济平衡失调等为主要症状,因受累血管供血范围的不同,可发生中枢、桥脑、延髓或小脑的症状或体征.本病多由痰浊内蕴、瘀血阻络所致,痰瘀互结,阻于脑窍,脑府失养,清阳不升,浊阴不降而发为眩晕.笔者采用健脾化痰祛风,补气活血通络之法,以祛痰活血止眩汤治疗本病,疗效满意,现报告如下.     

养心通脉片对动脉粥样硬化大鼠"痰瘀"病理细胞凋亡的影响

目的:观察养心通脉片对动脉粥样硬化(AS)大鼠"痰瘀"病理细胞凋亡的影响.方法:采用高脂饲料喂饲法复制Wistar大鼠动脉粥样硬化模型,造模1个月后检测动脉斑块形成,作为模型成功的指标,治疗组用养心通脉片,对照组用绞股蓝总甙片治疗1个月.检测血脂、血糖、血液流变学、胰岛素,光镜、电镜及运用免疫组化法观察动脉血管平滑肌细胞(VSMC)细胞凋亡的变化.结果:养心通脉片对动脉粥样硬化模型大鼠有明显的降脂、改善血液流变性、改善胰岛素抵抗功能,能消退斑块并维持主动脉组织结构及功能,使细胞凋亡趋于正常.结论:养心通脉片对改善AS大鼠"痰瘀"病理细胞凋亡有良好的效果.     

新旧《医院财务制度》衔接的体会

镇江是全国两轮医改的试点城市。文章从6个方面总结镇江四院率先执行新《医院财务制度》所取得的经验,为全国顺利接轨服务。     

Evaluation of three methods for measurement of hemoglobin and calculated hemoglobin parameters with the Sysmex KX-21 and ADVIA 120 in Beagle dogs and Sprague Dawley (SD) rats

The Sysmex KX-21 uses a novel cyanide-free colorimetric method to detect hemoglobin (HGB) concentration. This measurement has not been compared with the cyanmethemoglobin method on the ADVIA 120 which is recommended as the reference method by the International Committee for Standardization in Hematology. Additionally, ADVIA 120 uses flow cytometric method to detect cellular HGB concentration. The aim of this study was to compare the three methods of HGB analysis on the two analyzers. Fresh K₃EDTA blood samples from 32 dogs and 27 rats were included. A complete blood count (CBC) was performed on each sample using the Sysmex KX-21 and ADVIA 120. Colorimetric and cellular HGB concentrations and all calculated variables based on HGB measurement were compared using linear regression, Passing–Bablok regression, and Bland–Altman plots, using the cyanmethemoglobin method as the reference method. In samples from both species, an excellent correlation was found between the HGB results measured with the cyanide-free method and the cyanide-based method (r?=?0.97); however, a slight mean proportional bias of 3.8 % (dogs) and 1.9 % (rats) was observed. The correlation of flow cytometric cellular HGB concentration and extracellular total HGB concentration on the ADVIA 120 was excellent (r?=?0.97), and no significant bias was observed. Additionally, excellent to fair agreement was evident for all calculated erythrocyte and HGB variables. Thus, the cyanide-free HGB method and flow cytometric method could be used with blood samples from dogs and rats; however, the proportional bias should be considered.     

Role of Sprouty1 (Spry1) in the pathogenesis of atrial fibrosis

Atrial fibrosis is the hallmark of atrial fibrillation (AF) dependent structure remodeling. Besides, sprouty 1 (Spry1) plays a key role in the process of fibrosis. In this study, we investigated whether Spry1 could regulate TGF-β1 in atrial fibrosis. Ten dogs or patients were assigned to control (n = 4) and AF group (n = 6). The left atrium of dogs or right atrial appendage of patients was taken. After that, cardiac fibroblasts were treated with or without angiotensin II (Ang II). Furthermore, cardiac fibroblasts were transfected with lentivirus of Spry1 over-expression vector, Spry1 shRNA or negative control (NC). And the protein expression of Spry1 and TGF-β1 was analyzed by western blot and immunohistochemistry. The results showed that TGF-β1 was highly expressed while Spry1 was lowly expressed in the models of human and canine with AF. Besides, the protein expression of TGF-β1 was up-regulated and Spry1 was down-regulated in Ang II stimulated cardiac fibroblasts. Furthermore, when Spry1 was knockdown in Ang II-induced cardiac fibroblasts, the cell proliferation and the TGF-β1 protein expression increased significantly, while Spry1 over-expression showed inverse results. Our results demonstrated that Spry1 may target TGF-β1 in regulating fibrosis. These findings may provide possible therapeutic targets in atrial fibrosis.