星形细胞

Results hypso-purity (95%) astrocytes can be acquired and more depurative by passaging, part of astrocytes will be dying after nulli -nutrition;If applying methylprednisolone (10umol/l), cytoactive of damaged astrocytes will obviously super and expression of GFAP also obviously increase, all the thing is opposite for normal astrocytes.

结果 星形胶质细胞摇床后传至第三代，经鉴定其星形胶质细胞纯度达95%以上；缺氧3h后部分细胞形态变圆甚至死亡漂浮在正常细胞表面；正常组和损伤组分别加入MPSS3d后，损伤组细胞活性与GFAP表达均明显升高，但是正常则没有明显变化。

Results The hind limb function of the injured rats recovered at different degrees, the most extent recovery occurred during the time site 1~2 week, recovery continued from 2 to 3 week and, BBB was up to 12 at the end of the third week, but there was no significance recovery during 3~4 week. the astrocyte caudal to the injury plane began hyperplasy and hypertrophy; astrocyte in which GFAP in expression was positive the gray matter increased obviously from 3 days to 14 days after hemisection. The expression of MBP is same as that of GFAP.

结果 伤后后肢均有不同程度的恢复，1~2周时恢复幅度最大，2~3周时后肢运动功能继续恢复，3周时BBB评分最高达12分，3~4周运动功能无显著性恢复，损伤后1 d损伤远端3~6 mm处GFAP阳性星形胶质细胞开始增生肥大，3~4 d灰质中星形胶质细胞明显增多，2周时达到高峰，损伤近端3~6 mm处少突胶质细胞的增生反应过程与星形胶质细胞相似。

Results (1)Astrocytes and oligodendrocytes in mixed culture appeared better growth and differentiation than the respectively purified neuroglial, especially for the oligodendrocytes.(2) There were many pseudopod process among the astrocytes, which appeared centripetal growth mode.(3) The passaged astrocytes kept good abilities of division and proliferation and completely fused after 1 week of growth, and the purity was over 95%.

结果 (1)混合培养的星形胶质细胞和少突胶质细胞生长分化状况均优于纯化后的生长，以少突胶质细胞表现更为明显；(2)星形胶质细胞呈向心性生长，细胞相邻的接触面有较多的伪足；(3)传代培养的星形胶质细胞保持较强的分裂增殖能力，可在1周左右生长至完全融合，其纯度可达95%以上。

Objective: To observe the quantitative and morphological changes of astrocytes in nucleus of solitary tract after vagus nerve stimulation.

目的：观察颈部迷走神经千刺激后孤束核内星形胶质细胞数量、形态的改变，同时在电镜水平观察星形胶质细胞与神经元之间突触形态、数量的变化，从胶质细胞的角度阐明VNS治疗神经精神疾病的重要机制。

Methods The NGF, BDNF, and NT3 genes of rats were cloned, the eukaryote expression vectors were established, the three kind of recombinant vectors were used to transfect astrocytes, the positive cloned cells were cultured dilatedly after G418 sifting; using supernates of culture liquid of astrocytes modified by gene to culture PC12 or TrkB-PC12, the expression and its level of gene target cells aimed genes were measured by Western blotting or immunohistochemical method.

克隆大鼠NGF、BDNF和NT3基因，构建真核表达载体；3种重组载体分别转染星形胶质细胞，G418筛选后获得阳性克隆细胞进行扩大培养；取基因修饰星形胶质细胞培养液上清培养PC12细胞或TrkB-PC12细胞；用Western blotting杂交或免疫组织化学方法检测基因靶细胞目的基因的表达及其水平。

It has been found that ectogenic GDNF has nervous protective effec,but ectogenic GDNF cannot enter blood brain barrier.

传统观点认为，星形胶质细胞是神经系统的支持细胞，构成神经组织的网架而起支持作用，与神经元的解剖位置关系紧密，参与中枢神经系统的免疫反应，参与构成血脑屏障，目前研究发现，脑缺血时星形胶质细胞异常活跃，通过合成多种蛋白质、细胞因子和神经营养因子等对神经元起保护作用，对缺血性脑损伤的发展和转归具有重要意义。

After cocultured with reactive astrocytes, olfactory ensheathing cells can promote the proliferation of reactive astrocytes,and reduce the astrocyte gliosis and expression of inhibitory cytokines.

嗅鞘细胞作用于活化后的星形胶质细胞以后，能够促进星形胶质细胞的分裂增殖，同时能够减少星形胶质细胞胶质化，降低抑制性细胞因子的表达。

Results: ApoD was observed positively expressed in type2 astrocytes and oligodendrocytes from O2A lineage, while it was not expressed in type1 astrocytes from T1A lineage. Accordingly, we can verify the phenomenon found in the study of T1A and T2A gene different expression profile that ApoD mRNA was highly expressed in T2A and lowly expressed in T1A. Conclusion: It can be concluded that lipid metabolism related genes such as ApoD play important roles in the generation and differentiation of O2A lineage, which closely correlate with internal mechanism of lipid metabolism in the brain and myelogenesis.［Key words］astrocyte(T1A, T2A); oligodendrocyte; O2A lineage; apolipoproteinApoD

我们已采用基因芯片技术在mRNA水平研究两型星形胶质细胞的基因表达谱差异，发现ApoD在2型星形胶质细胞中差异高表达，故本文拟用激光共聚焦双重免疫荧光标记技术进一步在蛋白质水平观察ApoD在体外分化成熟的两型星形胶质细胞以及少突胶质细胞中的表达情况，以期为我们深入研究ApoD等脂代谢相关基因在脑内脂质代谢和神经髓鞘发育机制中所起的作用提供有用的实验依据，依此探讨胶质细胞发生和分化的信号机制。

Methods The astrocytes were isolated from cerebral cortex of neonatal rats which are born within three days, cultivating by DMEM media added with 15% fetal calf serum and depurating by swinging and passaging, to simulate nulli-nutrition model by substituting medium for PBS buffer solution 3h then applying methylprednisolone and recnutrition immediately, we will go on culturing for three days, verificating astrocytes by immunofluorescent technique; detecting activity of AST; determining GFAP of change by PCR.

采用出生3d内的SD大鼠的新生鼠的大脑制成细胞悬浊液后，应用含15%胎牛血清的DMEM培养液中培养，通过摇床和逐渐传代纯化星形胶质细胞，通过PBS缓冲液代替培养基模拟缺营养模型3h后即刻应用甲基强的松龙(10umol/l)，然后继续培养3d，免疫荧光技术鉴定星形胶质细胞；MTT法检测细胞的增殖活性和凋亡；PCR技术测定细胞GFAP表达的变化。

GFAP overexpessed but NOS neuron decreased, distorted and pale. The glia in SM-DB complex of ONR hypertrophied, but NOS neuron no degeneration. The increased GFAP immunoreactivity and the morphometric and cytological changes in SM-DB complex astrocytes may reflect a sustained upregulation of cellular activity with the insults of neurons, resulting in hypertrophy of glial perikarya and cell processes.

老年减退组星形胶质细胞的细胞体密度较老年正常组和青年组明显增加（P 在GFAP免疫细胞化学和NOS组织化学双重染色的切片上，老年减退大鼠SM-DB星形胶质细胞明显肥大，突起粗壮弯曲，GFAP超量表达，而NOS阳性神经元数量减少，胞体变形，突起减少，染色深度下降。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。