灯盏花素干预体外培养大鼠脑皮质神经元的存活与生长

背景：神经生长因子在维持中枢神经系统神经细胞的存活、分化,促进其生长、发育,维持其功能方面具有不可替代的作用。 目的：观察灯盏花素对SD大鼠大脑皮质体外培养神经元生长的影响,并初步探讨其机制。 方法：取新生SD大鼠胚胎,取其大脑皮质后,对神经元进行原代培养,随机分为3组,其中灯盏花素组加入10 g/L灯盏花素,对照组加入等量生理盐水,正常组不作任何处理,各组又分为24 h、48 h亚组。对24孔板中各组细胞各时间点采集图像,之后采用RT-PCR技术检测神经生长因子、酪氨酸激酶A mRNA的表达变化。对96孔板中各组细胞不同时间点采用MTT检测神经元生长活力。 结果与结论：正常组和对照组在各时间点细胞数、胞体面积、突起长度及细胞活力无明显差异（P〉0.05）,但正常组及对照组均有随时间点延长,3个指标均上调（P0.05）,灯盏花素组各时间点较正常组和对照组上调（P〈0.05）。提示灯盏花素促进SD大鼠脑源性神经元的存活、生长,其机制可能是通过上调神经生长因子及其受体TrkA的表达发挥作用。     

灯盏花素对大鼠神经元的影响及其与BDNF信号通路的关系

探讨灯盏花素对sD大鼠大脑皮质体外培养神经元生长的影响及其与脑源性神经营养因子（BDNF）信号通路的关系。结果示灯盏花素组在细胞数、胞体面积、突起长度及细胞活力方面均较对照组及正常组升高（P〈0．05）。BDNF及TrkBmRNA的表达在灯盏花素组也较对照组和正常组升高（P〈0．05）。灯盏花素促进sD大鼠脑源性神经元的存活、生长,其机制可能是通过上调BDNF及其受体TrkB的表达。     

灯盏花素干预体外培养大鼠脑皮质神经元的存活与生长

背景：神经生长因子在维持中枢神经系统神经细胞的存活、分化,促进其生长、发育,维持其功能方面具有不可替代的作用。 目的：观察灯盏花素对SD大鼠大脑皮质体外培养神经元生长的影响,并初步探讨其机制。 方法：取新生SD大鼠胚胎,取其大脑皮质后,对神经元进行原代培养,随机分为3组,其中灯盏花素组加入10 g/L灯盏花素,对照组加入等量生理盐水,正常组不作任何处理,各组又分为24 h、48 h亚组。对24孔板中各组细胞各时间点采集图像,之后采用RT-PCR技术检测神经生长因子、酪氨酸激酶A mRNA的表达变化。对96孔板中各组细胞不同时间点采用MTT检测神经元生长活力。 结果与结论：正常组和对照组在各时间点细胞数、胞体面积、突起长度及细胞活力无明显差异(P > 0.05),但正常组及对照组均有随时间点延长,3个指标均上调(P < 0.05),灯盏花素组细胞数、胞体面积、突起长度及细胞活力均较正常组及对照组升高(P < 0.05)。神经生长因子及TrkA mRNA的表达在正常组和对照组在各时间点无明显差异(P > 0.05),灯盏花素组各时间点较正常组和对照组上调(P < 0.05)。提示灯盏花素促进SD大鼠脑源性神经元的存活、生长,其机制可能是通过上调神经生长因子及其受体TrkA的表达发挥作用。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

一种新生SD大鼠皮质源性神经元的培养方法

BACKGROUND: Primary culture in vitro of neurons plays an important role in the development, regeneration, signal transduction mechanisms, neuropharmacology and gene expressions of the nervous system. OBJECTIVE: To establish a simple method for primary culture of high-purity cortical neurons in neonatal Sprague-Dawley rats. METHODS: Cortical tissues were acquired from neonatal Sprague-Dawley rats born 1 day. In traditional experimental group, the whole cortex was removed; in improved experimental group, the cortical tissues, 2-3 mm thick on the brain surface were removed. Single cell suspensions were prepared after papain digestion and centrifugation and were then seeded onto 24-well culture plates containing neuron solutions for primary culture (1×105 per well). Cells were identified by neuronal specific markers MAP-2 and Tuj1 after 3-day culture. The number of neurons and neurite length were observed under inverted phase contrast microscope and recorded at 6, 24, 48 and 72 hours, 5 and 7 days of culture, resprctively. RESULTS AND CONCLUSION:The cultured cells expressing MAP-2 and Tuj1 were neurons that could be used in the following experiments. The purity of neurons in the improved experimental group was 92% at 3 days, while only 51% in the traditional experimental group. Cells in both two groups had attached to the wall presenting with small processes at 6 hours, and a simple neural network formed at the 3rd day until dense neural networks could be found at the 5th day. To conclude, our culture method herein is simple and convenient, and can be used to produce neurons with high purity, which will be helpful for the experimental studies on cortical neurons from Sprague-Dawley rats. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程