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• 基础研究 • 上一篇    下一篇

Citicoline对大鼠中脑原代细胞培养的神经保护作用

姜晓燕1,3,贾晓晶2,吕文天1,赵红光1,王志成1,龚守良1*   

  1. 1. 吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春130021;2. 吉林大学第二医院放疗科,吉林 长春130041;3. 长春市卫生局卫生监督所,吉林 长春130033
  • 收稿日期:2005-10-31 修回日期:1900-01-01 出版日期:2006-03-28 发布日期:2006-03-28
  • 通讯作者: 龚守良1*

Neuroprotective effects of citicoline on 6-hydroxydopamine-treatedmesencephalic dopaminergic neurons in primary culture

JIANG Xiao-yan1,3, JIA Xiao-jing2, LU Wen-tian1, ZHAO Hong-guang1, WANG Zhi-cheng1, GONG Shou-liang1*   

  1. 1. MH Radiobiology Research Unit, School of Public Health, Jilin University, Changchun 130021,China; 2. Department of Radiotherapy, Second Hospital, Jilin University, Changchun 130041, China; 3. Public Health Supervision Institution of Changchun City, Changchun 130033, China
  • Received:2005-10-31 Revised:1900-01-01 Online:2006-03-28 Published:2006-03-28
  • Contact: GONG Shou-liang1*

摘要: 目的:探讨胞二磷胆碱(citicoline,CC)对6-OHDA诱导的帕金森体外细胞模型的保护作用及其机理。方法:孕15 d大鼠胚胎中脑原代培养,在培养第6 、8及10天,实验组加不同浓度CC(2、1、0.1、0.01和0.001 mmol·L-1 ),并于第11天加50 μmol·L-1的6-OHDA作用0.5 h,制作帕金森病细胞模型;6-OHDA组为原代培养细胞加50 μmol·L-1的6-OHDA;对照组为原代培养细胞。培养11 d收集细胞。采用MTT法测细胞活力,通过流式细胞仪,用Fluo3/AM检测细胞内Ca2+i及用罗丹明123检测线粒体膜电位(Δψm)。结果:2、1和0.1 mmol·L-1 CC组,细胞活力与对照组比较明显增高,并随着浓度的增加而增加,差异具有显著性(P<0.05)。1、0.1、0.01 和0.001 mmol·L-1 CC+6-OHDA组,细胞活力均高于6-OHDA组,差异有显著性(P<0.01)。1、0.1、0.01、0.001 mmol·L-1 CC+6-OHDA组细胞内Ca2+i均明显下降,分别为(32.23±1.87)%、(17.09±7.45)%、(21.71±8.89)%及(29.18±4.71)%,与6-OHDA组(49.30±7.62)%相比,差异均有显著性(P<0.01);与对照组(42.40±0.81)%比较明显下降,差异均有显著性(P<0.01)。CC+6-OHDA各组与6-OHDA组比较均使Δψm升高,其中1 mmol·L-1CC+6-OHDA组Δψm高于对照组,差异有显著性(P<0.01)。结论:CC通过保护神经元细胞膜、增加细胞活力、降低细胞内Ca2+i以及提高Δψm,发挥其对神经元的保护作用。

关键词: 神经元, 细胞, 培养的, 羟多巴胺, 帕金森病, 神经保护药

Abstract: Objective To study the neuroprotective effects of citicoline (CC) on the toxicity induced by 6-OHDA towards dopaminergic mesencephalic neurons in primary culture-Parkinson′s disease (PD) model in vitro and its mechanism. Methods Mesencephalic neurons in culture were prepared from embryonic 15-day Wistar rats. Cultures were treated for 6, 8, 10 d with various concentrations of CC (2,1,0.1,0.01 and 0.001 mmol·L-1). At 11th day, the cultures were co-treated with the toxin 6-OHDA (50 μmol·L-1) for 0.5 h, the cells were collected. Seven groups were categorized as follows:CC (2,1, 0.1, 0.01 and 0.001 mmol·L-1) +6-OHDA, control and 6-OHDA group. The cell viability was evaluated with MTT assay. Intracellular free Ca2+,Ca2+i, was labeled by using the fluorescent dye Fluo3-AM and detected by flow cytometer. By measuring the intracellular Rhodamine 123 fluorescence density with flow cytometer, mitochondrial membrane potential (MMP) was evaluated. Results Cultures were treated with 2, 1 and 0.1 mmol·L-1 CC, the viability of cell was increased (P<0.05). 1, 0.1, 0.01 and 0.001 mmol·L-1 CC significantly attenuated 6-OHDA-induced neurotoxic effects. As compared with 6-OHDA, the viability of neurons increased, the mean Ca2+i was significantly lower in cells treated with CC(1, 0.1, 0.01 and 0.001 mmol·L-1 ) plus 6-OHDA (49.30±7.62)% than that in 6-OHDA group without CC treatment (P<0.01). The densities of Ca2+i in CC (1, 0.1, 0.01 and 0.001 mmol·L-1) plus 6-OHDA groups were (32.23±1.87)%,(17.09±7.45)%,(21.71±8.89)%,(29.18±4.71)%, respectively,and the density of mean Ca2+i in 6-OHDA group was (49.30±7.62)%. MMP significantly increased(P<0.01). Conclusion CC has an important effect on dopaminergic cell survival in vitro in a validated model of PD. The neurotoxic effect of 6-OHDA can be reduced by CC and CC can increase the viability of neurons, decrease Ca2+i, maintain MMP at a relatively higher level.

Key words: neurons, cells, cultured, dopamine, Parkinson′s disease, neuroprotective remedy

中图分类号: 

  • R977