胃灵颗粒治疗消化性溃疡的临床与实验研究

目的:研究胃灵颗粒对消化性溃疡愈合质量(QOUH)和大鼠乙酸慢性胃溃疡愈合质量的影响.方法:用随机分组的方法,观察临床消化性溃疡的复发率并用苏木精-伊红染色对大鼠愈合性胃溃疡再生黏膜进行定量观察,测定胃壁结合黏液量、胃酸、胃蛋白酶活性.结果:胃灵颗粒组能降低消化性溃疡的复发率,改善胃溃疡大鼠胃黏膜的组织损伤并提高胃壁结合黏液量,减少胃酸的排出.结论:胃灵颗粒能提高QOUH,是临床抗消化性溃疡复发的可能机制之一.     

胃癌中医证型与胃癌转移相关基因E-cadherin的关系研究

目的:从基因蛋白表达上探索胃癌患者中医证的本质.方法:将收集到的术前胃癌患者病例资料按中医辨证分型标准确定其证型归属;用免疫组化EnVision二步法检测术后胃癌肿瘤标本中E-cadherin基因蛋白表达情况.结果:E-cadherin在100例胃癌患者中的阳性表达率为90%,证型间表达差异存在显著性(P<0.01);进一步两两比较示,痰湿凝结型、气血双亏型与脾胃虚寒型之间无明显差异,表达较高;瘀毒内阻型与肝胃不和型无明显差异,表达较低.结论:瘀毒内阻型与肝胃不和型胃癌患者的E-cadherin表达偏低,此两种证型肿瘤转移形成的途径可能与E-cadherin,即与肿瘤细胞间同质性黏附力降低相关.     

不同栽植密度和施肥量下党参生物量变化动态及其效应研究

通过栽植密度和施肥量二因素四水平三重复随机区组试验结果:对茎叶生物量积累最具优势的组合为密度105万株/hm2和施肥量240 kg/hm2,增量为652 mg/d;对单根生物量积累最优组合为密度60万株/hm2和施肥量240 kg/hm2,单根重达14.88 g.本试验结果可为党参种植及田间管理提供参考.     

栀子药材中三种有效成分HPLC定量分析结果不确定度的评定

采用HPLC方法同时测定栀子药材中栀子苷、绿原酸和藏红花素Ⅰ的含量,通过对测试方法流程进行分析,确定不确定度来源,结合含量测定方法验证数据,计算了不确定度分量、合成不确定度及扩展不确定度;结果表明,用HPLC方法定量分析栀子药材中栀子苷、绿原酸和藏红花素1的方法满足现代药物分析方法学的要求,且三者的扩展不确定度分别为0.1024,0.2254,0.1265.     

麻黄汤中麻黄碱、伪麻黄碱在人体药代动力学研究

目的:建立气相色谱-选择离子质谱法(GC-MS/SIM)测定人体血液中麻黄碱(ephedrine,E)、伪麻黄碱(pseudoephedrine,PE)的浓度,以此进行麻黄汤药代动力学研究.方法:用GC-MS/SIM法,HP-5弹性石英毛细管(25m×0.2mmID),载气He,柱流量1.0ml/min,无分流进样,柱初温80℃,1min后以15 ℃/min升至200℃,再以20℃/min升至240℃,保持5min,选择离子(SIM,m/z=154,265),进样量1μl.结果:E、PE分别在5ng/ml～1000ng/ml,2.5ng/ml～500ng/ml范围内与峰面积比值呈良好的线性关系(r=0.9988,r=0.9994),最低检测浓度分别为2ng/ml,1ng/ml(S/N=3).加样回收率分别为107.5%～96.2%,102.5% ～93.9%.两者日内、日间精密度的RSD<10%.血浆样品60天内稳定性RSD<10%.用本法测定了12名志愿者口服麻黄汤后血浆中药物浓度经时变化过程,并对其药动学参数进行估算.结论:本法稳定、准确,灵敏度高,适于E、PE的动力学研究.     

舒心平胶囊对大鼠实验性心律失常的作用

目的:观察舒心平胶囊对心律失常的影响.方法:舒心平连续给药7天,乌头碱静注诱发大鼠心律失常,记录各组动物发生室性早搏(VP)、室性心动过速(VT)时乌头碱用量;乌头碱侧脑室给药观察各组动物心律失常的持续时间;氯化钡静脉给药,观察各组动物出现心律失常时氯化钡用量.结果:舒心平可明显提高乌头碱致大鼠发生VP、VT的用量;明显缩短大鼠中枢性心律失常的持续时间,并可提高氯化钡诱发大鼠心律失常的剂量.结论:舒心平胶囊对模型动物诱发的室性早搏、室性心动过速具有拮抗作用.     

注重基本技能训练提高学生临床实践能力

对临床教学面临的困难及开展基本技能的必要性的进行了思考.结合自身通过遴选临床教学主讲老师,加强师资队伍的培训;建设多功能临床模拟实验室;加强基本功训练,提高学生临床动手能力等方式,开展了临床技能优化训练,并取得了一定的成效.     

非X线透视下用DHS内固定在治疗股骨转子间骨折的体会

文章阐述了在非X线透视下用DHS内固定治疗股骨转子间骨折67例的临床体会，即充分利用DHS钉在设计上所具有的生物力学性能及其仿生学形态特点，在没有X线透视下行内固定术。在讨论中重点提出了在手术中应注意的问题及其解决办法。     

Antitumor effects of a monoclonal antibody that binds anionic phospholipids on the surface of tumor blood vessels in mice.

PURPOSE: We recently reported that anionic phospholipids, principally phosphatidylserine, become exposed on the external surface of viable vascular endothelial cells in tumors, possibly in response to oxidative stresses present in the tumor microenvironment. In the present study, we tested the hypothesis that a monoclonal antibody directed against anionic phospholipids might exert antitumor effects by causing vascular damage in tumors. EXPERIMENTAL DESIGN: A new mouse immunoglobulin G3 monoclonal antibody, 3G4, was raised that binds anionic phospholipids in the presence of serum or beta2-glycoprotein I. The antibody was tested for its ability to localize to tumor vessels and exert antitumor effects in mice. RESULTS: 3G4 recognized anionic phospholipids on the external membrane of H(2)O(2)-treated endothelial cells and in vitro. It localized specifically to tumor vascular endothelium and to necrotic tumor cells after injection into severe combined immunodeficient mice bearing orthotopic MDA-MB-435 tumors. Treatment with 3G4 retarded the growth of four different tumors in mice. It reduced the growth of established orthotopic MDA-MB-231 and MDA-MB-435 human breast tumors in mice by 75% and 65% respectively, large L540 human Hodgkin's tumors by 50%, and small syngeneic Meth A fibrosarcomas by 90%. Histologic examination revealed vascular damage, a reduction in vascular density, and a reduction in tumor plasma volume. Treatment with 3G4 induced the binding of monocytes to tumor endothelium and infiltration of macrophages into MDA-MB-435 and MDA-MB-231 tumors. No toxicity to the mice was observed. CONCLUSIONS: 3G4 localizes specifically to complexes of anionic phospholipids and serum proteins on the surface of vascular endothelial cells in tumors in mice. This results in damage to tumor vasculature and suppression of tumor growth.     

The association of XRCC1 haplotypes and chromosomal damage levels in peripheral blood lymphocyte among coke-oven workers.

Theoretically, a haplotype has a higher level of heterozygosity than individual single nucleotide polymorphism (SNP) and the association study based on the haplotype may have an increased power for detecting disease associations compared with SNP-based analysis. In this study, we investigated the effects of four haplotype-tagging SNPs (htSNP) and the inferred haplotype pairs of the X-ray cross-complementing group 1 (XRCC1) gene on chromosome damage detected by the cytokinesis-block micronucleus assay. The study included 141 coke-oven workers with exposure to a high level of polycyclic aromatic hydrocarbons and 66 nonexposed controls. The frequencies of total MN and MNed cells were borderline associated with the Arg(194)Trp polymorphism (P = 0.053 and P = 0.050, respectively) but not associated with the Arg(280)His, Arg(399)Gln and Gln(632)Gln polymorphisms among coke-oven workers. Five haplotypes, including CGGG, TGGG, CAGG, CGAG, and CGGA, were inferred based on the four htSNPs of XRCC1 gene. The haplotype CGGG was associated with the decreased frequencies of total MN and MNed cells, and the haplotypes TGGG and CGAG were associated with the increased frequencies of total MN and MNed cells with adjustment for covariates among coke-oven workers. This study showed that the haplotypes derived from htSNPs in the XRCC1 gene were more likely than single SNPs to correlate with the polycyclic aromatic hydrocarbon-induced chromosome damage among coke-oven workers.