白细胞介素36α对小鼠银屑病样皮损及趋化因子CCL20的影响

目的 探讨白细胞介素(IL)36α对小鼠银屑病样皮损及CC趋化因子配体20(CCL20)的影响.方法 30只BALB/c雌性小鼠分为3组:凡士林空白对照组(对照组)、咪喹莫特模型组(模型组)以及IL-36α实验组(实验组).用小鼠银屑病皮损面积和疾病严重程度评分(PASI)观察银屑病样小鼠皮损动态变化.光镜下观察皮损组织形态学变化,并测量表皮层厚度.用实时荧光定量PCR、Western印迹检测对照组与模型组小鼠皮损中IL-36α表达情况,用实时荧光定量PCR、Western印迹法、免疫组化方法检测小鼠皮损中CCL20的含量变化.结果 模型组皮损中IL-36α mRNA表达水平明显高于对照组(△Ct值分别为0.0195±0.0059、0.0012±0.0004,两组比较,P＜0.05);模型组皮损中IL-36α蛋白表达水平明显高于对照组(分别为3.922±0.248、0.690±0.025,两组比较,P＜0.05).对照组、实验组CCL20 mRNA表达(△Ct值)分别为0.378±0.075、2.152±0.793,与模型组(0.999±0.178)比较,差异有统计学意义(P＜0.05);对照组、实验组CCL20蛋白表达结果分别为0.025±0.009、0.397±0.033,与模型组(0.145±0.030)比较,差异有统计学意义(P＜0.05).免疫组化结果表明,实验组皮损中CCL20的含量较模型组显著增加,差异有统计学意义(Z=2.294,P＜0.05).结论 IL-36α可通过促进CCL20表达,加重银屑病样小鼠皮损病变.     

核与辐射事件现场快速剂量估算系统的研究与设计

目的 研究核与辐射突发事件卫生应急指挥关键技术,为决策人员和技术人员的现场处理工作提供一套辅助指挥工具.方法 根据国家标准和国际组织的技术建议,结合本课题组研究成果,利用现代信息技术,通过编写计算机程序方式完成该系统的研制和程序集成.结果 研制完成了现场快速剂量估算计算机软件.结论 将在核与辐射突发事件卫生应急救援中发挥积极的作用.     

Role of caspase-3 in ethanol-induced developmental neurodegeneration

Acute, transient exposure to ethanol causes a widespread pattern of caspase-3 activation and neuroapoptosis in the developing rodent brain. To determine whether caspase-3 activation is an essential step in ethanol-induced developmental neuroapoptosis, we treated homozygous caspase-3 knockout mice or wild-type mice on postnatal day 7 with an apoptosis-inducing dose of ethanol and examined the brains at appropriate survival times for evidence of apoptotic neurodegeneration. In caspase-3 knockout mice, the cell death process evolved more slowly than in wild-type mice, and morphological changes observed were not those typically associated with apoptosis. However, neuronal cell counts performed 2 weeks post-treatment revealed that the extent of neuron loss was similar in wild-type and caspase-3-deficient mice. We conclude that absence of functional caspase-3 alters the time course and morphological characteristics of the neurodegenerative process but does not prevent ethanol-induced neuron death.     

脑组织移植和神经干细胞研究进展

综述了近年来广泛开展的神经组织和细胞移植的各种主要方法及其进展。着重对神经干细胞这一神经科学的前沿课题进行了详细的复习。并对神经干细胞的研究方法,神经营养因子和神经干细胞的关系,神经干细胞的分化诱导及共临床方面的应用前景作了阐述。     

松果体区神经内镜解剖学研究

目的 观察松果体区及其毗邻结构的神经内镜下解剖特点,探讨内镜下各经典入路的解剖通路及操作技巧,为临床神经内镜下松果体区手术的操作提供解剖基础. 方法 选取100g/L甲醛固定的国人成年尸体头颅标本15例,神经内镜下分别模拟枕叶下经天幕入路和幕下小脑上入路,观察2种手术入路下松果体区解剖结构的暴露范围与内镜可调整程度,测量手术入路相关解剖结构数据. 结果 模拟枕叶下经天幕入路中,内镜视野及角度调整宽松灵活,显露松果体区各解剖结构满意,模拟幕下小脑上入路中,内镜视野呆板固定,可调整性差;经测量大脑大静脉长度为(10.2±4.1) mm,大脑内静脉长度为(35.0±2.8) mm,基底静脉长度为(35.4±6.4)mm,直窦长度为(51.1±5.2) mm,大脑大静脉与直窦的平均角度为(75.20±10.4)°,其中锐角14例,钝角1例,直窦的延长线位于胼胝体压部下方3例,与胼胝体压部上边相切11例;位于胼胝体压部上方1例. 结论 枕叶下经天幕入路较幕下小脑上入路对松果体区内镜解剖结构显露更为满意,天幕切开可改善枕叶下经天幕入路部分对侧解剖结构显露不足及内镜调整困难的缺点.     

抑郁症患者脑结构网络效率属性及与疾病严重程度的相关分析

目的 探讨抑郁症患者与健康对照者脑结构的网络效率及节点效率属性的异同,分析抑郁症患者大脑全局信息处理模式和脑区间信息整合效率的改变,及其与疾病严重程度的关系.方法 对27例抑郁症患者(抑郁症组)和36名健康对照者(对照组)进行弥散张量成像扫描,利用解剖学自动标记模板将整个大脑划分为90个区域,同时对全脑进行确定性纤维追踪,构建脑结构二值化网络.并对所得抑郁症组与对照组脑结构网络的效率属性值进行双样本t检验.结果 (1)2组脑网络分别与相匹配的随机网络比较:网络全局效率均与随机网络相似;网络局部效率均大于随机网络.(2)抑郁症组网络全局效率(0.86±0.01)较对照组(0.87±0.01)下降(t=-2.31;P =0.02).(3)抑郁症组节点全局效率属性值较对照组(右侧额上回眶部:0.41±0.04与0.44±0.02;左侧颞中回颞极:0.31 ±0.02与0.33±0.03)下降(t=-3.52、-3.84;P=0.0008、0.0003;通过多重校正).(4)抑郁症组右侧额上回眶部全局效率属性值与HAMD17总分呈负相关(r=-0.46,P=0.02).结论 抑郁症患者与健康人大脑都具有高效经济的“小世界”式的信息处理模式.抑郁症患者脑区间信息整合的能力已受损,且与疾病严重程度呈负相关.     

Inhibiting p38 mitogen-activated protein kinase attenuates cerebral ischemic injury in Swedish mutant amyloid precursor protein transgenic mice

Cerebral ischemia was induced using photothrombosis 1 hour after intraperitoneal injection of the p38 mitogen-activated protein kinase (MAPK) inhibitor SB239063 into Swedish mutant amyloid precursor protein (APP/SWE) transgenic and non-transgenic mice. The number of surviving neurons in the penumbra was quantified using Nissl staining, and the activity of p38 MAPKs was measured by western blotting. The number of surviving neurons in the penumbra was significantly reduced in APP/SWE transgenic mice compared with non-transgenic controls 7 days after cerebral ischemia, but the activity of p38 MAPKs was significantly elevated compared with the non-ischemic hemisphere in the APP/SWE transgenic mice. SB239063 prevented these changes. The APP/SWE mutation exacerbated ischemic brain injury, and this could be alleviated by inhibiting p38 MAPK activity.     

太极扣附着体覆盖全口义齿修复后的组织相容性评价

背景：太极扣附着体固位的覆盖全口义齿较之传统全口义齿稳定性好、固位力强、咀嚼效率高,但由于基牙覆盖在义齿基托下,缺乏口腔的自洁作用,易发生基牙牙周组织炎症而导致覆盖基牙丧失,义齿修复失败。 目的：评价太极扣附着体覆盖全口义齿修复后对基牙牙周组织的影响。 设计、时间及地点：自身对比观察,于2006-01/2008-12 在郑州大学口腔医学院实验室完成。 对象：选择2006-01/2007-12就诊于郑州大学口腔医学院口腔修复科的牙列缺损患者20例,女13例,男7例;年龄54~78岁;上颌4例,下颌16例。单颌余留1或2颗尖牙、双尖牙或其残根,松动度不超过Ⅰ度,根长大于或等于8 mm,牙槽骨吸收不超过根长的1/2。 方法：按常规桩核冠根管预备要求进行基牙的根管预备,取印模,灌模型,完成太极扣附着体单颌覆盖全口义齿,将带有太极扣的金属根桩粘固于基牙根管内,使义齿在口内就位。 主要观察指标：每例患者分别在义齿修复前、修复后1,6,12个月,4个时间段测定基牙的牙龈指数、菌斑指数,并拍摄全口牙位曲面体层片,比较修复前和修复后12个月基牙的牙槽嵴高度。 结果：修复前和修复后1,6个月的基牙牙龈指数、菌斑指数差异均无显著性意义(P > 0.05);修复后12个月基牙的牙龈指数高于修复前(P < 0.05)。同一个体修复前和修复后12个月基牙的平均牙槽嵴高度差异无显著性意义(P > 0.05)。 结论：太极扣附着体覆盖全口义齿修复后对基牙牙周组织的影响较小,组织相容性较好。     

犀角地黄汤合银翘散及其单方对小鼠流感病毒性肺炎治疗作用的比较

目的 比较截断疗法经典方犀角地黄汤合银翘散及其单方对小鼠流感病毒性肺炎的治疗作用,探究犀角地黄汤和银翘散在截断疗法中的不同作用.方法 ICR小鼠和BALB/c小鼠,随机分为正常组、模型组、犀角地黄汤合银翘散组(简称合方组)、犀角地黄汤组、银翘散组、达菲组,除正常组外其余小鼠以流感病毒滴鼻感染,1 h后给药.各组分别以对...     

Curzerene suppresses progression of human glioblastoma through inhibition of glutathione S‐transferase A4

AimsGlioblastoma is the central nervous system tumor with the highest mortality rate, and the clinical effectiveness of chemotherapy is low. Curzerene can inhibit the progression of non‐small‐cell lung cancer, but its role in glioma has not been reported. The purpose of this study was to clarify the effect of curzerene on glioma progression and further explore its potential mechanism.MethodsThe expression of glutathione S‐transferase A4 (GSTA4) in glioblastoma and the effect of curzerene on the expression of GSTA4 and matrix metalloproteinase 9 and the activation of the mTOR pathway were detected by Western blotting and RT‐PCR, and the effects of curzerene treatment on glioma malignant character were detected by cell biological assays. The in vivo antitumor effects of curzerene were analyzed in a nude mouse xenograft model.ResultsCurzerene was found to inhibit the expression of GSTA4 mRNA and protein in U251 and U87 glioma cells, and this effect correlated with a downregulation of the proliferation of these cells in a time‐ and dose‐dependent manner. Invasion and migration were also inhibited, and curzerene treatment correlated with induction of apoptosis. Curzerene inhibited the activation of the mTOR pathway and the expression of matrix metalloproteinase 9, and it correlated with increased 4‐hydroxynonenal levels. In vivo, curzerene was found to significantly inhibit tumor growth in nude mice and to prolong the survival time of tumor‐bearing nude mice.ConclusionIn conclusion, inhibition of GSTA4 correlates with positive outcomes in glioma models, and thus, this molecule is a candidate drug for the treatment of glioma.