外加磁场对半乳糖化白蛋白磁性阿霉素纳米粒在大鼠体内分布影响的研究

目的观察半乳糖化白蛋白磁性阿霉素纳米粒(ADR-GHMN)在正常肝脏中的靶向性,并观察ADR-GHMN在全身各脏器的分布特征及外加磁场对其分布的影响.方法大鼠正中开腹,肝动脉插管并固定,肝动脉注射125I-ADR-GHMN(相当于阿霉素0.5 mg/kg),左外叶加磁场,磁场应用30 min,移去磁场后,动物立即处死;对照组:肝动脉注射ADR-GHMN,左外叶不加磁场,30min后,移去磁场后,动物立即处死,立即取靶区肝、非靶区肝、肾、心、肺、小肠、脾及周围血作γ计数.肝组织作病理切片.结果注入的纳米粒75～85%分布于肝脏,其它脏器极少.病理切片显示磁区小动脉见大量纳米粒存在,对照组及非磁区肝中纳米粒很少见.结论ADR-GHMN在正常肝组织中有明显的磁靶向性;在磁场作用下,ADR-GHMN主要分布于肝脏,其它脏器含量很少;试验组肾、心、肺、小肠、脾及外周血于对照组的放射活性比较明显降低,表明磁性物质的存在使这些脏器的相对药物暴露明显减少.     

天然抗氧化剂多靶点作用在防治心脑血管疾病中的研究进展

从天然抗氧化剂的多靶点作用角度阐述其防治心脑血管疾病的效应机制、研究动态，并提出存在的问题及解决思路。     

Real-time refinement of subthalamic nucleus targeting using Bayesian decision-making on the root mean square measure.

The subthalamic nucleus (STN) is a major target for treatment of advanced Parkinson's disease patients undergoing deep brain stimulation surgery. Microelectrode recording (MER) is used in many cases to identify the target nucleus. A real-time procedure for identifying the entry and exit points of the STN would improve the outcome of this targeting procedure. We used the normalized root mean square (NRMS) of a short (5 seconds) MER sampled signal and the estimated anatomical distance to target (EDT) as the basis for this procedure. Electrode tip location was defined intraoperatively by an expert neurophysiologist to be before, within, or after the STN. Data from 46 trajectories of 27 patients were used to calculate the Bayesian posterior probability of being in each of these locations, given RMS-EDT pair values. We tested our predictions on each trajectory using a bootstrapping technique, with the rest of the trajectories serving as a training set and found the error in predicting the STN entry to be (mean +/- SD) 0.18 +/- 0.84, and 0.50 +/- 0.59 mm for STN exit point, which yields a 0.30 +/- 0.28 mm deviation from the expert's target center. The simplicity and computational ease of RMS calculation, its spike sorting-independent nature and tolerance to electrode parameters of this Bayesian predictor, can lead directly to the development of a fully automated intraoperative physiological procedure for the refinement of imaging estimates of STN borders.     

不同类型高危儿早期干预的临床研究

目的 探索早期干预对窒息、高胆、早产三类高危儿智力发育改善的效果，寻找更合适的早期干预措施。方法 将三类高危儿分为干预组及对照组，同时随机选取正常对照组进行随访。干预组采用鲍秀兰教授“0～3岁”早期干预方案训练，各组均在6个月、1岁时分别采用婴幼儿智能发育量表(CDCC)进行智力发育测评，结果用MDI、PDI表示。结果 (1)6个月龄时MDI各干预组与对照组间有显著性差异，窒息组、早产组与正常组间亦有显著性差异；高胆组与正常组间无差异；PDI窒息组中干预组与对照组之间有显著差异(P＜0．01)，高胆组、早产组均无差异(P＞0．05)。(2)1岁时MDI和PDI结果一致，干预组与对照组间比较窒息组、高胆组有显著差异，早产组无差异；窒息组、高胆组干预组与正常组比较无差异，对照组和早产组与正常组比较均有显著差异(P＜0．01)。(3)所有干预组测评分值均高于对照组，6个月与1岁之间比较有显著差异，各观察组间比较有显著性差异(P＜0．01)。结论 三类高危儿早期干预效果差异较大，干预组均较对照组分值高，早期干预有改善智力发育的作用；三类高危儿中，窒息组、高胆组效果最好，均达到或超过正常水平。所有未干预组均不及正常水平；早期干预对足月高危儿效果显著，对早产儿欠佳，远期效果尚需进一步随访观察。     

国人脑内某些解剖结构定位研究与临床应用

本文通过对４５个正常成人脑标本进行三维连续２ｍｍ切片，对Ｆｏｒｅｌ－Ｈ，隔区等九个脑内重要结构的解剖坐标及毗邻关系进行观测，为立体定向手术提供解剖学依据。５５例临床实践证明手术疗效比较满意。     

雷达员的目标跟踪能力测验

目的:建立雷达操作员心理选拔系统. 方法:在分析雷达任务的基础上,设计计算机化的目标跟踪能力模拟雷达测验任务,对334名相关被试施测,分析实验结果,评价测试任务的性能指标. 结果:测验结果的数据分布接近正态,变异系数为38%,区分度较好;重测信度系数为0.764(P<0.05);对专家和被试的主观调查表明有较高的内容效度;分别以机械作图和计算机学绩成绩、学习新技术的能力、工作绩效作效标,效度系数为0.273, 0.247, 0.309, 0.445(P<0.05). 结论:本测验可作为雷达员心理选拔的测试项目.     

HBsAg阳性患者中HBV-DNA(PCR)与其它HBV复制标志物的关系

本文应用聚合酶链反应(PCR)对125例乙型肝炎病毒患者血清进行了HBV-DNA检测,根据其检测结果与乙型肝炎病毒的其它复制标志物HBcAg(检测125例)、HBeAg(检测115例)、PreS_2Ag(检测92例)、PHSA-R(检测114例)、Anti—HBclgM(检测118例)进行比较。HBV-DNA阳性血清中HBcAg、HBeAg、PreS_2Ag、PHSA-R、Anti-HBcIgM的检出率分别为83.75％(67/80)、62.34％(48/77)、61.02％(39/59)、74.03％(57/77)、72.97％(54/74)。经统计学处理,显示五项复制标志物与HBV-DNA的相关关系应是:HBcAg>PHSA-R>Anti-HB-cIgM>HBeAg>PreS_2Ag。在HBV-DNA(PCR)阳性血清中,HBcAg的检出率为最高。提示在除HBV-DNA(PCR)外,上述五项标志物中,HBcAg可能是HBV-DBA复制的最佳指标。HBeAg在HBV复制过程中的地位仍有待今后进一步探讨。     

The influence of muscle-conditioned media on chick embryo brainstem neurons in culture

Brainstem pieces from the trigeminal region of the metencephalic basal plate of 10-day chick embryos were dissociated and cultured in control conditions or in the presence of muscle-conditioned medium (MCM). The MCM was derived from age-matched target tissue relevant to this neuronal region (jaw musculature), from relevant target tissue of an age at which innervation would initially be taking place (4 days), and from nonrelevant target tissue also of an early stage (4-day limb bud). Neuronal survival and differentiation was assessed daily, for 7 days. Survival and differentiation were significantly enhanced by the 4-day jaw MCM compared to both the controls and the cultures grown with 10-day jaw MCM and 4-day limb MCM. These measures in the presence of 10-day jaw MCM and 4-day limb MCM did not differ, but surpassed that seen in control cultures. The results are compared to the more specific responsiveness seen in earlier (2-day) neural tube cultures, and their relationship to in vivo regenerative nerve fiber outgrowth is considered.     

原发性高血压患者应用抗高血压药物不良事件原因分析

目的 探讨原发性高血压患者应用抗高血压药物不良事件及其原因。方法 将243例观察对象按照用药正确与否分3组，应用面对面横断面调查方法，分析比较组间不良事件发生率及其原因。结果 导致原发性高血压患者发生不良事件的主要原因是经常停药、他人介绍用药、媒介宣传用药、经济原因停药、配伍不合理、测量值不正确、用一种药物时间过长和药物个体适应性差等原因。结论 合理正确应用抗高血压药物对于保护高血压患者靶器官具有重要意义。