胚胎NA能神经元移植对鼠点燃癫痫发作程度的影响

目的：明确胚胎NA能神经元移植对点燃癫痫发作严重程度的影响。方法：以Wistar大鼠为研究对象，按移植物的性质分为NA移植组、移植对照组和还对照组。首先定期电刺激杏仁核制备电点燃癫痫模型，再用立体定向技术向各组动物的海马移植相应的移植物，移植后观察癫痫的电生理和行为学指标（杏仁核后放电阈值、持续时间、癫痫行为级别、癫痫持续时间）变化情况，TH免疫组织化学染色了解移植物存活情况。结果：经统计学处理，移植前后各指标无显著性差异（P＞0．05）。结论：胚胎NA能神经元移植对点燃癫痫的发作严重程度无抑制作用。     

Responses of CDKs and p53 in Delayed Ischemic Neuronal Death

Stroke is a debilitating disease that affects millions each year.While in many cases cerebral ischemic in jury can be limited by effectivw resuscitation or thrombolytic treatment,the injured neurons wither in a process known as delayed neuronal death(DND).Mounting evidence indicates that DND is not simply necrosis played out in slow motion but apoptosis is triggered.Of particular interest are two groups of signal proteins that participate in apoptosis-cyclin dependent kinases(CDKs) and p53-among a myriad of signaling events after an ischemic insult.Recent investigations have shown that CDKs,a family of enzymes initially known for their role in cell cycle regulation,are activated in injured neurons in DND.As for p53,new reports suggest that its up-regulation may represent a failed attempt to rescue in jured neurons,although its up-regulation was previously considered an indication of apoptosis.These observations thus rekindle an old quest to identify new neuroprotective targets to minimize the stroke damage.In this review,the author will examine the evidence that indicates the participation of CDKs and p53 in DND and then introduce pre-clinical data to explore CDK inhibition as a potential neuroprotective target.Finally,using CDK inhibition as an example,this paper will discuss the pertinent criteria for a viable neuroprotective strategy for ischemic in jury.     

从传统走向现代——当代人才德育培养模式探析

从青年道德的现状出发 对当代人才德育培养模式提出几点思考。     

地塞米松对布比卡因诱导小鼠神经元毒性的影响

Objective To investigate the effect of dexamethasone on the toxicity of bupivacaine in murine neurons.Methods Murine neuroblastoma cell line N2a was obtained from ATCC cell bank (USA). The cells were cultured in 10% fetal cow serum/MEM culture medium and divided into 4 groups voup I control (Con); group II bupivacaine ( Bup); group Ⅲ dexamethasone (Dex) and group IV Dex + Bup. The culture medium contained bupivacaine 900 μmol/L in group Bup and dexamethasone 1 μmol/L in group Dex respectively. In group Dex + Bup ( IV ) Bup was added to the culture medium with a final concentration of 900 μmol/L at 12 h after pretreatment with Dex 1 μmol/L. The cells were inoculated in 24 well plates (0.5 ml in each well, 24 wells in each group) and 10 cm culture dishes (7 ml in each dish, 4 dishes in each group). The release rate of LDH was calculated and the morphology of the cells and nucleus condensation (by Hoechst 3334224 fluorescent staining) was detected at 9 h of incubation in 24 well plates. The mitochondrial transmembrane potential (by JC-1 assay) and phosphorylation of Akt and ERKs (by Western blot) were measured at 5 h of incubation in 24 well plates and in culture dishes respectively. ResultsBupivacaine caused severe damage to the N2a cells as evidenced by increase in LDH release and nucleus condensation (apoptosis), dephosphorylation of Akt and ERKs, decrease in mitochondrial transmembrane potential and severe morphological changes. Dexamethasone pretreatment significantly attenuated bupivacaine-induced neurotoxicity. Conclusion Dexamethasone can protect N2a cells from bupivacaine-induced neurotoxicity through stabilization of mitochondrial transmembrane potential and inhibition of dephosphorylation of Akt and ERKs.     

试论护生系统思维方式的培养

现代护理模式的建立 ,人们已不满足对局部的单因素分析 ,更注重对人体整体系统作出综合性多因素考察 ,这将促使护理工作者必须运用系统思维方式 ,来思考和处理护理学中的复杂问题。1　系统思维方式及其特征系统思维方式是将所要研究的对象 ,作为一个系统着重从系统的整体与要求、要素与要素、系统与环境之间的相互作用、相互联系的关系中综合地考察对象 ,以达到全面、精确地了解对象 ,科学准确地分析、判断 ,并对问题作最佳处理的思维方式。系统思维方式的特征 :整体性、综合性是系统思维方式的基本特征 ,具体体现在整体与部分之间、部分与…     

创造性思维与医学研究生培养

本文阐述了创造性思维在医学研究生培养与成才过程中的作用,列举了目前研究生从入学到毕业后去向整个过程中,创造性思维的缺乏和院方培养力度的不足,提出了四点改革建议.     

加强临床思维能力培养在传染病教改中的探索

人类社会已经跨入了 2 1世纪 ,依照世界医学发展的趋势和医学五年制本科专业学生的培养目标 ,根据国际、国内新传染病不断出现 ,老传染病死灰复燃的严峻形势 ,对人才培养也有更高更新的要求 ,进一步探讨提高学生临床分析和思维能力的教学改革模式迫在眉睫。 2 0 0 0～ 2 0 0 1年度教学中我们开展了一次备有尸体解剖结果的、难度较大 ,具有学科交叉性的临床病例讨论读书报告会 ,以培养学生临床思维能力。现报告如下 :1　材料在 97级 5年制统招生学生进入传染病临床桥梁课过程中 ,举办具有特色的读书报告会。此病例即 :因间发腹痛 10余年 ,发…