α-突触核蛋白聚集及传播模型的构建

目的 建立α-突触核蛋白(α-synuclein,α-syn)聚集及传播的细胞和动物模型,为帕金森病的发病机制研究提供基础。方法 亲和层析法纯化α-syn蛋白,体外诱导其聚集成为α-syn纤维(Preformed fibrils,PFFs); 培养稳定表达GFP-α-syn的HEK293细胞系及原代神经元,转导α-synPFFs后免疫荧光染色法观察细胞内α-syn聚集情况; 小鼠立体定位注射α-syn PFFs,免疫组织化学法检测内源性α-syn的聚集及传播情况。结果 纯化的α-syn可在体外聚集形成聚集体; 在细胞及动物水平观察到α-syn PFFs可诱导内源性蛋白的聚集和传播。结论 本研究建立了α-syn聚集及传播的细胞和动物模型,为帕金森病的相关研究打下了基础。     

姜黄素对多巴胺能细胞的保护作用研究

目的探讨姜黄素对多巴胺能细胞的保护作用及机制。方法采用神经毒素鱼藤酮(1μmol/L)处理经神经生长因子(NGF)(50 ng/ml×7)诱导分化过的PC12细胞,并在处理前6 h加入1μmol/L的姜黄素进行干预,MTT法检测细胞活力,荧光分光光度法检测细胞内活性氧水平,比色法检测还原型谷胱甘肽(GSH)含量。结果 NGF诱导后的PC12细胞经1μmol/L鱼藤酮处理24 h后,细胞活力下降至对照组的57.1%,细胞内活性氧水平为对照组的189%,而GSH水平显著下降(P<0.05);姜黄素干预后,与鱼藤酮组相比,细胞活力和GSH含量显著提高,活性氧水平显著降低(P<0.05)。结论姜黄素对多巴胺细胞具有保护作用,其机制与抗氧化活性有关。     

胎盘植入34例治疗结局分析

目的探讨胎盘植入不同治疗方法的结局。方法回顾性分析长春市妇产医院和吉林大学第一医院在2010-2014年收治的胎盘植入患者34例,分别采用手术治疗、药物保守治疗、子宫动脉栓塞3种不同的治疗方法,观察治疗后效果。结果34例胎盘植入的病例中,产后出血发生率85.29%,合并感染5例,3例切除子宫。根据胎盘植入的范围、深度给予不同的处理方法,剖宫产术分娩21例,术中积极缝合止血,其中2例严重出血切除子宫;阴道分娩13例,给予药物、子宫动脉栓塞治疗后,1例患者子宫切除,其余患者均成功保留生育功能。结论根据前置胎盘植入的部位、深度、面积,采用不同的治疗方法,可有效地减少产后出血,保留子宫,经验值得借鉴。     

帕金森病多巴胺神经元死亡的分子机制

帕金森病（PD）的主要病理变化是黑质多巴胺（DA）能神经元选择性变性。尽管对PD的发病机制已有大量研究，但DA能神经元死亡的确切机制还不清楚，可能遗传因素和环境因素在PD发病中均起作用。最近发现几种家族性PD与特殊基因突变有关，尽管散发性PD中无这些突变，但对家族性PD中几种基因突变的进一步明确却给研究散发性PD提供了线索。蛋白表达和折叠异常、蛋白降解功能障碍、线粒体功能异常、氧化应激、炎症反应、神经营养障碍等均可能参与PD的发病过程。     

治疗寒饮体会

痰饮既是病理产物,又是致病因素,作为病名,首见于《金匮要略》。痰饮有广义、狭义之分,历代医家对痰与饮有分论者。饮之生成,因外受之邪,内伤水饮,致脾胃运化失常,水饮停聚而成。痰之形成,因六淫侵袭者,或因其化热,煎熬津液致痰;或因其化痰,津液凝聚为痰。因内伤而致者,诸如饮食过伤,劳倦至极,     

Quantitative autoradiographic study on receptor regulation in the basal ganglia in rat model of levodopa-induced motor complications

In order to study neurotransmitter receptor regulation in the basal ganglia involved in the functional changes underlying levodopa-induced motor complications, quantitative autoradiography was used to observe receptor bindings of dopamine D1 and D2, N-methyl-D-aspartate （NMDA）, amino-3-hydroxy-5-methylisoxazole propionic acid （AMPA） and amino butyric acid （GABA） in the basal ganglia of rats that had unilateral nigrostriatal lesions and had been chronically treated with levodopa until motor complications developed. The rats were randomly assigned to three groups： normal, denervated and treatment-complicated groups. The results showed that response duration to levodopa became progressively shorter and abnormal involuntary movement （AIM） score was progressively increased during the course of levodopa treatment. Chronic treatment augmented D1 receptors more than denervation, and reduced D2 receptors that were also increased by dopamine denervation. Striatal NMDA receptors were substantially up-regulated in the treatment-complicated group. Levodopa treatment did not change receptors of nigral AMPA, pallidal GABA, and subthalamic GABA, which remained the same as that in denervation group. However, chronic treatment reversed the increase of nigral GABA receptors caused by the lesion. It was concluded that a shortening of response duration and AIM mimicked levodopa-induced motor complications of Parkinson＇s patients. These data suggested that up-regulation of dopamine D1 and NMDA receptors in the striatum leads to an imbalance of stimulation through the striatal output pathways, which is associated with levodopa-induced motor complications.     

6-OHDA induces cycle reentry and apoptosis of PC12 cells through activation of ERK1/2 signaling pathway

This study investigated the effect and mechanism of cell cycle reentry induced by 6-hydrodopamine （6-OHDA） in PC12 cells. By using neural differentiated PC12 cells treated with 6-OHDA, the apoptosis model of dopaminergic neurons was established. Cell viability was measured by MTT. Cell apoptosis and the distribution of cell cycle were assessed by flow cytometry. Western blot was used to detect the activation of extracellular regulator kinasel/2 （ERK1/2） pathway and the phosphorylation of retinoblastoma protein （RB）. Our results showed that after PC12 cells were treated wtih 6-OHDA, the viability of PC12 cells was declined in a concentration-dependent manner. Flow cytornetry revealed that 6-OHDA could increase the apoptosis ratio of PC12 cells in a time-dependent manner. The percentage of ceils in G0/G1 phase of cell cycle was decreased and that in S phase and G2/M phase increased. Simultaneously, ERK1/2 pathway was activated and phosphorylated RB increased. It was concluded that 6-OHDA could induce cell cycle reentry of dopaminergic neurons through the activation of ERK1/2 pathway and RB phosphorylation. The aberrant cell cycle reentry contributes to the apoptosis of dopaminergic neurons.     

丁苯酞对帕金森病大鼠模型的疗效研究

目的研究丁苯酞对帕金森病(PD)大鼠行为学、中脑氧化应激水平及黑质多巴胺能神经元的影响并探讨其可能的疗效。方法采用鱼藤酮立体定向注射方法制作偏侧PD大鼠模型。将造模成功的大鼠随机分为按体质量丁苯酞20、40、80 mg/kg 3个治疗组及对照组,观察各组大鼠经丁苯酞干预前后旋转行为情况,采用分光光度计检测中脑还原型谷胱甘肽(GSH)、丙二醛(MDA)水平及超氧化物歧化酶(SOD)活性,另用免疫组化染色测定黑质酪氨酸羟化酶(TH)阳性细胞数量。结果 (1)与治疗前相比,按体质量丁苯酞80 mg/kg治疗组治疗后旋转圈数明显减少(P0.05);(2)与对照组损毁侧相比,各治疗组损毁侧中脑GSH水平增高,MDA水平降低,SOD活性增强(P0.05,P0.01);(3)与对照组损毁侧相比,按体质量丁苯酞80 mg/kg治疗组损毁侧黑质TH阳性细胞计数增多(P0.05)。结论丁苯酞可显著改善PD大鼠旋转行为,增强抗氧化能力,提高黑质多巴胺能神经元残存率,提示其可能具有治疗和保护作用。     

计算机程序化的初均速法测定双黄连注射液的稳定性

用计算机程序化的初均速法,测定了双黄连溶液中3种主要成分——绿原酸、黄苓甙、连翘甙的活化能及室温贮存期。该方法简便、快速、结果准确。对临床应用有一定价值。