IgA肾病和非IgA系膜增殖性肾小球肾炎抗内皮细胞抗体的检测

对１２７例ＩｇＡ肾病（ＩｇＡＮ）患者和２５例非ＩｇＡ系膜增殖性肾炎血清进行了抗内皮细胞抗体ＡＥＣＡ的检测。结果表明：ＩｇＡ肾病患者和非ＩｇＡ系膜增殖性肾炎患者血清ＡＥＣＡ－ＩｇＧ较正常对照组高，而ＩｇＡＮ患者较非ＩｇＡ系膜增殖性肾炎患者ＡＥＣＡ－ＩｇＧ的水平高，Ｐ〈０．０５。ＩｇＡＮ患者的ＡＥＣＡ－ＩｇＡ水平较正常对照组高。ＩｇＡＮ患者按ＡＥＣＡ水平分为阳性与阴性组，对两组硬化面积比进行比较，未见     

糖皮质激素联合抗凝在急性/亚急性重症颅内静脉血栓治疗中的探索

目的 本研究初步探讨糖皮质激素联合抗凝治疗在急性/亚急性重症颅内静脉血栓(cerebral venous thrombosis, CVT)中的作用。方法 纳入10例经过糖皮质激素联合抗凝治疗的急性/亚急性重症CVT患者,对治疗前后及出院3个月时的神经功能缺损、颅内压增高情况和血清、脑脊液炎症指标及不良事件进行回顾性分析。结果 10例患者经过糖皮质激素冲击治疗后2周,与入院时基线值相比,血清中性粒细胞与淋巴细胞比值(neutrophil-to-lymphocyte ratio, NLR)(P<0.05),超敏C反应蛋白(hypersensitive C-reactive protein, hs-CRP)(P<0.01),白细胞介素-6(interleukin 6,IL-6)(P<0.01)和脑脊液IL-6浓度(P<0.01)均明显下降;与入院时基线值相比,出院时改良Rankin量表(modified Rankin Scale, mRS)评分(P<0.01)、美国国立卫生研究院卒中评分(National Institutes of Health Stroke ...     

Synaptic transmission of chaotic spike trains between primary afferent fiber and spinal dorsal horn neuron in the rat

Primary sensory neurons can generate irregular burst firings in which the existence of significant deterministic behaviors of chaotic dynamics has been proved with nonlinear time series analysis. But how well the deterministic characteristics and neural information of presynaptic chaotic spike trains were transmitted into postsynaptic spike trains is still an open question. Here we investigated the synaptic transmission of chaotic spike trains between primary Adelta afferent fiber and spinal dorsal horn neuron. Two kinds of basic stimulus unit, brief burst and single pulse, were employed by us to comprise chaotic stimulus trains. For time series analysis, we defined "events" as the longest sequences of spikes with all interspike intervals less than or equal to a certain threshold and extracted the interevent intervals (IEIs) from spike trains. Return map analysis of the IEI series showed that the main temporal structure of chaotic input trains could be detected in postsynaptic output trains, especially under brief-burst stimulation. Using correlation dimension and nonlinear prediction methods, we found that synaptic transmission could influence the nonlinear characteristics of chaotic trains, such as fractal dimension and short-term predictability, with greater influence made under single-pulse stimulation. By calculating the mutual information between input and output trains, we found the information carried by presynaptic spike trains could not be completely transmitted at primary afferent synapses, and that brief bursts could more reliably transmit the information carried by chaotic input trains across synapses. These results indicate that although unreliability exists during synaptic transmission, the main deterministic characteristics of chaotic burst trains can be transmitted across primary afferent synapses. Moreover, brief bursts that come from the periphery can more reliably transmit neural information between primary afferent fibers and spinal dorsal horn neurons.     

圆孔外面的观察和测量及其面积的回归方程

60具成人颅骨颅底外面的圆孔观察和测量结果表明:圆孔多呈圆形,其次是卵圆形,其它形较少见.据圆孔与翼突外侧板根部延长线的位置关系,分圆孔位置为三型.圆孔外面观的各项测值左右间均无统计学差异,但其中管性圆孔管长度个体差异较大.圆孔的面积左右比较对称者占3.33±2.34%,左>右者占65.51±6.30%,右>左者占34.48±6.30%.圆孔面积左右对称性比较,对临床诊断疾病有参考意义.其面积的回归方程可由其长、宽径乘积推算 .     

蝎蜂毒肽对大鼠纤溶系统作用初探

本研究采用大鼠肢体血管灌流和整体给药两种模型，观察蝎蜂毒（ＳＢＰ）对血管理灌流液内纤溶酶原激活物（ＰＡ）活性、血浆优球蛋白纤溶性（ＥＦＡ）和纤溶酶（ＰＬ）活性的影响。结果说明，ＳＢＰ有明显激活纤溶系统作用；其机制可能涉及血管内皮细胞释放ＰＡ活性增加，进一步促使纤溶酶原活化为ＰＬ增多的途径。     

大鼠下丘脑及邻近区域催产素免疫阳性神经元与垂体后叶的关系

本文运用免疫细胞化学PAP及ABC法,显示大白鼠下丘脑内OXT免疫阳性神经元,并于垂体后叶注射WGA-HRP,显示下丘脑中逆行标记细胞,结合免疫细胞化学方法,观察下丘脑及其邻近区域内HRP与OXT双标记细胞,证实下丘脑视上核、室旁核、穹窿前核和后核、血管周细胞群、下丘脑视前区、下丘脑前区及外侧区、背侧副细胞群内、室周部、第三脑室侧壁室管膜细胞下及室间孔部室管膜细胞下,均有OXT免疫阳性神经元,其中至少部分神经元可发出向垂体后叶的投射纤维。位于第三脑室侧壁室管膜下及室间孔部室管膜下的神经元,可能监测脑脊液中各种因素的变化,调节垂体后叶OXT的分泌,也可能直接通过共树突向脑脊液内释放OXT。     

APAAP免疫印迹技术对抗副流感病毒1，3型单克隆抗体识别抗原表位的研究

副流感病毒１，３型（ＰａｒａｉｎｆｌｕｅｎｚａＶｉｒｕｓｔｙｐｅ１，３：ＰＩＶ＿１．３）单克隆抗体（ＭｃＡｂ）应用免疫印迹技术（Ｗｅｓｔｅｒｎｂｌｏｔｔｉｎｇ）识别抗原表位特性。结果表明：ＰＩＶ＿１．３抗原经还原剂处理后，ＳＤＳ－ＰＡＧＥ５％～１５％梯度胶电泳，能分辨二十多条清晰的蛋白带。转印后采用碱性磷酸酶抗碱性磷酸酶复合物（ＡＰＡＡＰ）染色，本底浅，呈玫瑰红色带，优于ＨＲＰ染色结果。ＰＩＶ＿１的５株ＭｃＡｂ：ＩＣ＿５、ＩＨ＿６、ＩＨ＿２、ＩＣ＿１０、３Ｄ＿５分别与６８ｋＤ～５０ｋＤ、６８ｋＤ、５８ｋＤ～２７ｋＤ、５５ｋＤ～５０ｋＤ、５０ｋＤ对应ＰＩＶ＿１的蛋白质抗原表位起反应。ＰＩＶ＿３的６株ＭｃＡｂ：２Ａ＿１０、５Ｇ＿３、２Ｄ＿１１、２Ｅ＿１０、２Ｂ＿１２、４Ｆ＿１２与７０ｋＤ、６８ｋＤ、６０ｋＤ～５０ｋＤ、５５ｋｐ～４０ｋＤ、５５ｋＤ、４０ｋＤ对应的蛋白质抗原表位特异结合，说明ＰＩＶ＿１．３的１１株ＭｃＡｂ同对应抗原表位点的结合分布较广，有利于对ＰＩＶ＿１．３抗原的快速、敏感、特异检测。     

Age-dependent and iron-independent expression of two mRNA isoforms of divalent metal transporter 1 in rat brain

The DMT1(Nramp2/DCT1) is a newly discovered proton-coupled metal-ion transport protein. The cellular localization and functional characterization of DMT1 suggest that it might play a role in physiological iron transport in the brain. In the study, we evaluated effects of dietary iron and age on iron content and DMT1 expression in four brain regions: cortex, hippocampus, striatum, substantia nigra. Total iron content in all regions was significantly lower in the low-iron diet rats and higher in the high-iron diet rats than that in the control animals, showing that dietary iron treatment for 6-weeks can alter brain iron levels. Contrary to our expectation, there was no significant alternation in DMT1(+IRE) and (-IRE) mRNA expression and protein content in all brain regions examined in spite of the existence of the altered iron levels in these regions after 6-weeks' diet treatment although TfR mRNA expression and protein level were affected significantly, as was expected. The data demonstrates that expression of DMT1(+IRE) and (-IRE) was not regulated by iron in these regions of adult rats. The lack of response of DMT1 to iron status in the brain suggests that the IRE of brain DMT1 mRNA might be not really iron-responsive and that DMT1-mediated iron transport might be not the rate-limiting step in brain iron uptake in adult rats. Our findings also showed that development can significantly affect brain iron and DMT1(+IRE) and (-IRE) expression but the effect varies in different brain regions, indicating a regionally specific regulation in the brain.     

实验性肺水肿大鼠血浆中内皮素、一氧化氮含量的变化以及硝普钠、川芎嗪对其的影响

在肾上腺素所致大鼠肺水肿实验中，发现其血浆中内皮素（ET－1）明显升高，一氧化氮（NO）稍有增高，但ET－1的增幅远远大于NO的增幅，动物均在15min内死亡。ET的增高与儿茶酚胺的升高有密切关系。经硝普纳（NP）、川芎嗪（TMP）预防后，ET－1与NO基本恢复正常，趋于平衡，动物长期存活。提示：肺水肿时NO相对于ET－1明显降低，NP、TMP可对NO与ET的平衡起调节作用。