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DSX及其成分对体外培养鼠视网膜神经节细胞影响的实验研究
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摘要
目的:1 建立高压体外培养视网膜神经节细胞模型并观察压力对视网膜神经节细胞的影响;2初步探讨利用体外培养细胞系进行药物成分筛选的顺序;3 观察通瘀开窍中药灯盏细辛提取物(DSX)及其成分对体外培养视网膜神经节细胞的影响。
     方法:1 建立大鼠视网膜神经细胞(Retinal Nerve Cells,RNCs)混合培养和视网膜神经节细胞(Retinal Ganglion Cells,RGCs)纯化培养模型。2 将装有RGCs的培养瓶密闭,分别加压至20mmHg、40mmHg、60mmHg、80mmHg,加压时间1~4小时后收集细胞,用流式细胞仪(FCM)测定凋亡细胞百分率。3在混合培养和纯化培养24小时后的神经细胞或RGCs中加入不同浓度的DSX及其成分DSX1-7、神经生长因子(NGF)、硼酸缓冲液,继续培养24小时,用噻唑兰比色法(MTT法),测定每组的光密度值(OD值)。4在培养纯化的RGCs中加入DSX7,并密闭加压至80mmHg,4小时后收集细胞,用流式细胞仪测定凋亡细胞百分率。
     结果:1 RNCs的混合培养最长可存活2~3周,RGCs的纯化培养可存活时间2~3天。2 压力20mmHg、40mmHg、60mmHg、80mmHg,加压时间1~4小时均能促进RGCS的凋亡,其凋亡细胞的数目以80mmHg、4小时为最多(P<0.01)。3(1)在RNCs培养中,5mg/ml、0.5mg/ml、0.05mg/ml、0.005mg/ml浓度的DSX和神经生长因子的OD值高于空白对照组(P<0.01)。(2)在RNCs培养中,10mg/ml的DSX3组的OD值低于空白对照组(P<0.01);2mg/ml、1mg/ml、0.2mg/ml、0.1mg/ml、0.02mg/ml、0.01mg/ml浓度的DSX3和神经生长因子组的OD值高于空白对照组(P<0.05~0.01)。(3)在RNCs培养中,2mg/ml、1mg/ml、0.2mg/ml、0.1mg/ml浓度的DSX7的OD值高于空白对
    
    照组(p<0.05一0.01)。(4)在RGCs培养中,Zmg/ml、zmg/ml浓度的DSX3的
    oD值高于空白对照组(p<0.05)。Zmg/ml、lmg/ml、0.2mg/ml浓度的DsX7
    的oD值高于空白对照组(P<0.05一0.01)。4在RGCs以80 mmHg培养4小时
    时,浓度lmg/ml的DSX7组的凋亡百分率低于空白对照组和模型组P<0 .01)。
     结论:l混合培养的RNCs比纯化培养的RGCs存活时间长。2压力能促
    进RGCs的凋亡,其凋亡细胞的数目随压力的增大、时间的延长而增加。3 DSX7
    是具有RGCs保护作用的最有效成分。4利用体外培养细胞系进行中药有效成
    分的逐级筛选是有效而经济的方法之一。
PURPOSE: 1 To build high pressure cell culture model in vitro of Retinal Ganglion Cells(RGCs) and observe the RGCs effected by pressure . 2 To research the sequence of screening of Chinese medicine component with cell line in vitro. 3 To study the effect and mechanism of DSX and DSX1-7 for RGCs cultured in vitro.
    METHODS: 1 Using one to three day SD-rats, we build Rat Retinal cells and RGCs cultured in virto.2 Put the different pressure (20mmHg, 40mmHg, 60mmHg, 80mmHg) to RGCs in close tightly culture-bottle for one to four hours, then collect RGCs and check the sum of apoptosis cells by Flow Cytometry(FCM). 3 Put different concentration DSX and DSX1-7, Nerve growth factor(NGF) and Boric acid Buffer in Retinal Nerve Cells (RNCs) and RGCs cultured after 24 hour in virto, then test the OD of living cells by MTT after anther 24 hours. (4) After cultured with the pressure of 80mmHg four hours, RGCs were collected and check the sum of apoptosis cells by Flow Cytometry.
    RESULTS: 1 RNCs can survive two or three weeks, RGCs can survive two or three days. 2 The pressure of 20mmHg, 40mmHg, 60mmHg and 80mmHg for one or four hours can acceleration the apoptosis of RGCs, but the apoptosis in the pressure of SOmmHg for four hours was the most severe in all. 3 (1) To RNCs , The ODs of living cells in NGF and DSX whose concentration was 5mg/ml , 0.5mg/ml, 0.05mg/ml and 0.005mg/ml are higher than control's (P<0.05). (2) To RNCs, The OD of living cells in DSX3 whose concentration was 10mg/ml is lower than control's (P<0.01). The ODs of living cells in NGF and DSX3 whose concentration was 2mg/ml, Img/ml, 0.2mg/ml and 0.1mg/ml, 0.02mg/ml and 0.01mg/ml is higher than control's (P<0.05~0.01). (3). To RNCs, The ODs of
    
    
    
    living cells in NGF and DSX7 whose concentration was 2mg/ml, Img/ml, 0.2mg/ml and O.lmg/ml are higher than contrors(P<0.05~0.01) .(4) To RGCs, The OD of living cells in DSX3 whose concentration was 2mg/ml and Img/ml are higher than control's(P<0.05) . The ODs of living cells in DSX7 which concentration was 2mg/ml, Img/ml and 0.2mg/ml are higher than control's (P<0.05~0.01).4 To RGCs with 80mg/ml for 4 hours , the percent of apoptosis of RGCs in DSX7 which concentration was Img/ml is lower than control's and model's (P<0.01).
    CONCLUSIONS: 1 The surviving time of RNCs was longer than that of RGCs.2 Pressure can accelerate the apoptosis of RGCs. The more high pressure and the more long time, the sum of apoptosis of RGCs is more.3 DSX7 was the most effictive factor in Protecting RGCs in vitro.4 It was a effective and cheap method using cells cultured in vitro to search effective factor in Chinese medicine.
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