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首页> 外文期刊>The European Journal of Neuroscience >Effects of brain-derived neurotrophic factor on cell survival, differentiation and patterning of neuronal connections and Muller glia cells in the developing retina.
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Effects of brain-derived neurotrophic factor on cell survival, differentiation and patterning of neuronal connections and Muller glia cells in the developing retina.

机译:脑源性神经营养因子对发育中的视网膜细胞存活,神经元连接和穆勒神经胶质细胞的分化和模式的影响。

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The aim of the present study was to determine the influence of brain-derived neurotrophic factor (BDNF) on survival, phenotype differentiation and network formation of retinal neurons and glia cells. To achieve a defined concentration and constant level of BDNF over several days, experiments were performed in an organotypic culture of the developing rat retina. After 6 days in vitro, apoptosis in the different cell layers was determined by TUNEL staining and cell-type-specific antibodies were used to identify distinct neuronal cell types and Muller cells. Cultured retinas treated with BDNF (100 ng BDNF/mL medium) were compared with untreated as well as with age-matched in vivo retinas. Quantitative morphometry was carried out using confocal microscopy. BDNF promoted the in vitro development and differentiation of the retina in general, i.e. the number of cells in the nuclear layers and the thickness of the plexiform layers were increased. For all neurons, the number of cells and the complexity of arborizations in the synaptic layers were clearly up-regulated by BDNF. In control cultures, the synaptic stratification of cone bipolar cells within the On- and Off-layer of the inner plexiform layer was disturbed and a strong reactivity of Muller cell glia was observed. These effects were not present in BDNF-treated cultures. Our data show that BDNF promotes the survival of retinal interneurons and plays an important role in establishing the phenotypes and the synaptic connections of a large number of neuronal types in the developing retina. Moreover, we show an effect of BDNF on Muller glia cells.
机译:本研究的目的是确定脑源性神经营养因子(BDNF)对视网膜神经元和神经胶质细胞的存活,表型分化和网络形成的影响。为了在几天内达到确定的浓度和恒定的BDNF水平,在发育中的大鼠视网膜的器官型培养物中进行了实验。体外培养6天后,通过TUNEL染色确定不同细胞层的凋亡,并使用细胞类型特异性抗体识别不同的神经元细胞类型和Muller细胞。将用BDNF(100 ng BDNF / mL培养基)处理过的视网膜与未处理以及年龄匹配的体内视网膜进行了比较。使用共聚焦显微镜进行定量形态测定。 BDNF通常促进视网膜的体外发育和分化,即核层中的细胞数量和丛状层的厚度增加。对于所有神经元,BDNF明显上调了突触层中细胞的数量和乔化的复杂性。在对照培养物中,内丛状层的内层和外层内视锥双极细胞的突触分层受到干扰,并且观察到穆勒细胞胶质细胞的强烈反应性。在BDNF处理的培养物中不存在这些作用。我们的数据表明,BDNF促进视网膜神经元的存活,并在建立视网膜发育中大量神经元类型的表型和突触连接中起重要作用。此外,我们显示了BDNF对穆勒胶质细胞的影响。

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