药学专业六年制学-硕连读培养模式探索

以新的视角、新的思维、新的观念来审视未来高等药学教育发展的趋势 ,建立新的药学教育观、人才观和质量观 ,这是新世纪对高等药学教育提出的更高要求。根据药学学科最新进展、发展趋势及国内外药学教育的发展动向 ,阐述了北京大学药学院药学专业六年一贯制 ,学 -硕连读研究型人才的培养目标及方案     

不同根管器械用于预备弯曲根管的效果比较

目的比较机用镍钛K锉、手用镍钛K锉、手用不锈钢K锉,在预备弯曲根管时的切削能力和成形能力。方法将30个树脂块弯曲人工根管分为三组,每组10个,分别用镍钛机用K锉、手用镍钛K锉、手用不锈钢K锉预备根管,用光学显微镜观察根管的偏移情况及标本的失重量进行对比分析。结果镍钛机用K锉无根管偏移,手用不锈钢K锉可发生根管偏移。预备后的根尖孔直径镍钛K锉组明显小于不锈钢K锉组(P<001)。结论镍钛器械保持原根管解剖走向的能力优于手用不锈钢K锉。镍钛机用K锉能保持弯曲根管良好的根管形态,建议临床广泛应用。     

三氯乙烯诱发SD大鼠产生免疫反应的模型研究

目的研究SD大鼠对三氯乙烯(trichloroethylene,TCE)免疫刺激的反应,拟建立大鼠对TCE免疫反应的模型.方法背部皮内注射体积分数为15%的TCE免疫SD大鼠,1周1次,免疫5次后于大鼠左后足跖膜下注射TCE攻击,6h称左右后足重量计算肿胀度.取TCE免疫大鼠心脏血,分离并培养单个核细胞.将培养的细胞与系列浓度的TCE共同培养2d后,检测细胞酸性磷酸酶的活性,据此判断细胞的活化增殖程度.结果 TCE免疫大鼠攻击足肿胀度与空白对照组大鼠的相比差异显著(P＜0.005).体积分数为3%的TCE可使培养的大鼠血单个核细胞的增殖达到峰值.结论重复皮内注射TCE可使SD大鼠产生某种免疫反应.SD大鼠的单个核细胞可被TCE刺激活化.     

Bacterial leakage in root canals filled with AH Plus and dentine bonding agents

Objective. The aim of this study was to compare the efficacy of different dentine adhesives in delaying the coronal bacterial leakage of Enterococcus faecalis in filled root canals. Materials and methods. Ninety-five lower incisors of patients >65 years of age were instrumented using the ProTaper® system and were irrigated with 1 mL of 2.5% sodium hypochlorite (NaOCl) alternated with 1 mL 17% EDTA between each file change. Final irrigation was performed with 5 mL of 17% EDTA and then flushed with 5 mL of distilled water. The teeth were randomly divided into five experimental groups (n = 15/group) and one of the following dentine adhesives was applied: (1) AdheSE®; (2) Excite® DSC; (3) Clearfil^? Protect Bond; (4) One Coat 7.0; or (5) Control group without adhesive. After filling the root canals, the samples were mounted on a double chamber device to evaluate the bacterial filtration of E. faecalis during a period of 240 days. The results underwent non-parametric Kaplan-Meier survival analysis and comparisons among groups were done using the Log-Rank test. Results. At 240 days, E. faecalis was detected in samples of all groups in the lower chamber. The highest survival value was obtained by One Coat 7.0, giving statistically significant differences from the other groups, whereas Clearfil^? Protect Bond, AdheSE® and Excite® DSC showed similar behaviours, likewise similar to the Control group. Conclusions. One Coat 7.0 adhesive system provides the longest survival value to delay E. faecalis coronal leakage in filled root canals.     

肝爽颗粒对慢性乙型肝炎肝纤维化（S1和S2期）肝郁脾虚兼血瘀证的早期防治疗效

目的 探讨肝爽颗粒用于慢性乙型肝炎（CHB）肝纤维化（S1和S2期）肝郁脾虚兼血瘀证的防治效果。方法 将100例患者采用数字表法分为对照组（50例，脱失4例，剔除2例，最后完成44例）和观察组（50例，脱失5例，剔除2例，最后完成43例）。两组患者均给予口服恩替卡韦片，0.5 mg/次，1次/d，共12个月；并视情况口服谷胱甘肽片。对照组，口服肝爽颗粒模拟药，3 g/次，3次/d；观察组，口服肝爽颗粒，3 g/次，3次/d；共治疗12个月。进行肝穿刺病理检查，比较两组患者炎性活动度分级及纤维化程度分期情况；比较两组患者肝脏硬度值（LSM）、肝功能、乙型肝炎病毒（HBV） DNA、肝郁脾虚证评分、天冬氨酸氨基转移酶（AST）与血小板比值指数（APRI）和基于4因子的纤维化指数（FIB-4）。结果 治疗后，与对照组比较，观察组患者肝组织纤维化程度分期轻于对照组（P<0.05）；观察组患者肝组织炎性活动程度轻于对照组（P<0.05）；观察组患者炎性活动程度分级有效率为77.78%，高于对照组的45.83%（χ²=5.546，P<0.05）；观察组纤维化程度分期有效率为59.26%，高于对照组的16.67%（χ²=9.669，P<0.01）；观察组在治疗后6个月、12个月的LSM和肝郁脾虚证评分均低于对照组（P<0.05，P<0.01）；观察组患者丙氨酸氨基转移酶（ALT）、AST、碱性磷酸酶（ALP）水平低于对照组（P<0.01）；观察组APRI和FIB-4水平低于对照组（P<0.01）。结论 肝爽颗粒联合恩替卡韦用于CHB肝纤维化（S1和S2期）的防治，可减轻炎症活动情况和纤维化程度，能延缓而且具有逆转肝纤维化的作用，并具有保肝和改善中医证候的效果，值得临床使用与进一步的研究。     

Leadership in Gerontological Nursing

Leadership in gerontological nursing demands from the nurse an understanding of the social, political and health care systems which impinge upon the client and the profession. A theoretical perspective of conflict and power is used to explain the impact of scarce resources, a major problem in the health care environment of the eighties. Conflict management and power employment are seen as requisite tools for effective leadership. Suggestions for reshaping existing gerontological nursing practice, nursing research and educational patterns are offered. New modes of health care delivery can be established by gerontological nurses that focus on the provision of cost effective, quality health care.     

Stem cell therapy with skeletal myoblasts accelerates neointima formation in a mouse model of vein graft disease

Although still a matter of controversial discussion, skeletal myoblasts are one of the options for stem cell transplantation improving cardiac function after myocardial infarction, exhibiting several advantages including the availability, the ability of self-renewal and differentiation, and the lack of ethical and immunological problems. The aim of this study was to investigate the impact of stem cell therapy with skeletal myoblasts on experimental venous bypass grafts in a mouse model of vein graft disease.Forty C57BL/6J mice underwent bypass grafting interposing a venous bypass graft of the donor mouse into the carotid artery of the recipient mouse.Twenty mice received periadventitially treatment with 1 million fluorescence labeled skeletal myoblasts suspended in culture medium (treatment group), the other twenty mice received only culture medium without myoblasts (control group).Two weeks after bypass surgery, the vein grafts of all 40 mice were harvested, stained and histologically investigated under light and immunofluorescence microscope.Against our expectations, skeletal myoblasts stayed in place and were still located in the adventitia after bypass grafting. Additionally, vein grafts of the myoblast group revealed a 2fold increased neoneointima formation, a decreased media thickness, a slightly increased neovascularization, a higher percentage of reendothelialization and also a slightly higher percentage of PDGFR ɑ, PDGFR ß, MMP-7 and MMP-9 positive cells, suggesting a paracrine mechanism responsible for accelerated neointima formation.In conclusion, the results of our study do not support the use of skeletal myoblast for the treatment of vein graft disease after coronary artery bypass surgery.     

Fluoride bioactive glass paste improves bond durability and remineralizes tooth structure prior to adhesive restoration

ObjectiveThe current study aimed at examining a fluoride containing bioactive glass (BiominF®) paste as a temporary filling material capable of remineralizing the demineralized enamel or dentin, and its ability to decrease a simulated dentinal fluids pressure on the resin/dentin interface, without affecting the shear bond strength of a universal bonding agent to enamel and dentin.Methods60 premolars were utilized for the acid resistance, trans-microradiography (TMR) and shear bond strength (SBS) experiments. Enamel and dentin discs were demineralized for 4 days to create a subsurface demineralized zone followed by applying BiominF® paste, 1.23% acidulated phosphate fluoride, or a temporary filling material for 24 h.30 extracted human non-carious third molars were utilized for the pulpal pressure experiment in which direct communication to the pulp chamber was created by cutting at a level approximately 1 mm below the cemento-enamel junction while the coronal enamel was ground to expose mid coronal dentin. The dentin surface was exposed to a simulated pulpal pressure. The dentin surfaces had BiominF® paste, an oxalate desensitizing agent, or temporary filling material followed by application of a universal adhesive system.ResultsOne way ANOVA showed that BiominF® paste remineralized effectively the demineralized enamel or dentin, did not affect the bond strength of the enamel and dentin surfaces to the tested adhesive system p < 0.05, and improved the acid resistance of the demineralized enamel and dentin against a secondary erosive challenge. Moreover, BiominF® paste decreased the nanoleakage expression in the dentin/adhesive interface exposed to a simulated pulpal pressure.SignificanceBiominF® paste may serve as a temporary filling material that may improve the longevity of adhesive restorations and help to conserve tooth structures by preserving the demineralized enamel and dentin form cutting during cavity preparation.     

Stromal vascular fraction improves deep partial thickness burn wound healing

ObjectiveThe practice of early burn wound excision and wound closure by immediate autologous skin or skin substitutes is the preferred treatment in extensive deep partial and full-thickness burns. To date there is no proven definite medical treatment to decrease burn wound size and accelerate burn wound healing in modern clinical practice. Stromal vascular fraction is an autologous mixture that has multiple proven beneficial effects on different kinds of wounds. In our study, we investigated the effects of stromal vascular fraction on deep partial-thickness burn wound healing.MethodsIn this study, 20 Wistar albino rats were used. Inguinal adipose tissue of the rats was surgically removed and stromal vascular fraction was isolated. Thereafter, deep second-degree burns were performed on the back of the rats by hot water. The rats were divided into two groups in a randomized fashion. The therapy group received stromal vascular fraction, whereas the control group received only physiologic serum by intradermal injection. Assessment of the burn wound healing between the groups was carried out by histopathologic and immuno-histochemical data.ResultsStromal vascular fraction increased vascular endothelial growth factor, proliferating cell nuclear antigen index, and reduced inflammation of the burn wound. Furthermore, vascularization and fibroblastic activity were achieved earlier and observed to be at higher levels in the stromal vascular fraction group.ConclusionsStromal vascular fraction improves burn wound healing by increasing cell proliferation and vascularization, reducing inflammation, and increasing fibroblastic activity.     

超声在肠系膜上静脉血栓治疗过程中的应用价值

目的:在肠系膜上静脉血栓治疗过程中,超声用于评价疗效和指导治疗的价值。方法:肠系膜上静脉血栓住院治疗的8例患者,超声连续观察肠系膜上静脉内径,血栓回声;肠系膜上动脉血流速度及阻力指数;水肿肠管的长度,肠壁厚度;周围小血管情况;腹腔积液的量等指标,评价治疗效果,指导临床。结果:8例肠系膜上静脉血栓的患者,根据临床资料,结合超声指征,3例手术治疗,其中1例术后第2天死亡,其余术后症状明显缓解,超声呈逐渐恢复表现。5例保守治疗,超声征象改善,症状逐步缓解,出院。结论:超声实时、动态观察肠系膜上静脉血栓治疗中的声像图变化,及时评价治疗效果,为临床提供直接证据,指导治疗。