中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (6): 945-949.doi: 10.3969/j.issn.2095-4344.2015.06.022

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

神经节苷脂对体外培养一氧化碳损伤少突胶质细胞Nogo-A的影响

王晓虹1,王  虹2,车菊华4,王苏平1,汪  涛3,朱艳玲5   

  1. 大连市中心医院,1神经内科,2综合病房,3康复病房,辽宁省大连市  116033;4大连医科大学,辽宁省大连市  116044;5大连市第三人民医院神经内科,辽宁省大连市  116033
  • 收稿日期:2015-01-13 出版日期:2015-02-05 发布日期:2015-02-05
  • 通讯作者: 王虹,硕士,主任医师,大连市中心医院综合病房,辽宁省大连市 116033
  • 作者简介:王晓虹,女,1975年生,黑龙江省佳木斯市人,汉族,2003年大连医科大学毕业,硕士,副主任医师,主要从事一氧化碳中毒后迟发性脑病和运动障碍疾病等方面的研究。
  • 基金资助:

    大连市卫生局2008年度科研计划项目

Ganglioside effect on Nogo-A expression of rat oligodendrocytes in vitro after carbon monoxide poisoning

Wang Xiao-hong1, Wang Hong2, Che Ju-hua4, Wang Su-ping1, Wang Tao3, Zhu Yan-ling5   

  1. 1Neurology Department, 2Comprehensive Ward, 3Rehabilitation Ward, Dalian Municipal Central Hospital, Dalian 116033, Liaoning Province, China; 4Dalian Medical University, Dalian 116044, Liaoning Province, China; 5Department of Neurology, the Third People’s Hospital of Dalian, Dalian 116033, Liaoning Province, China
  • Received:2015-01-13 Online:2015-02-05 Published:2015-02-05
  • Contact: Wang Hong, Master, Chief physician, Comprehensive Ward, Dalian Municipal Central Hospital, Dalian 116033, Liaoning Province, China
  • About author:Wang Xiao-hong, Master, Associate chief physician, Neurology Department, Dalian Municipal Central Hospital, Dalian 116033, Liaoning Province, China
  • Supported by:

    the Scientific Research Plan of Dalian Health Department in 2008

摘要:

背景:Nogo-A蛋白是表达于少突胶质细胞的神经元轴突生长抑制因子,推测其可能与一氧化碳中毒后迟发性脑病关系密切。单唾液酸四己糖神经节苷脂可改善一氧化碳中毒所致的神经系统损害,其作用是否与少突胶质细胞上Nogo-A蛋白有关目前尚无报道。
目的:从少突胶质细胞Nogo-A的角度探讨神经节苷脂对神经细胞一氧化碳损伤后保护的机制。
方法:体外培养大鼠视神经少突胶质细胞。实验分为3组:对照组、一氧化碳组、单唾液酸四己糖神经节苷脂组。后两组在含有体积分数1%一氧化碳的密室中培养,单唾液酸四己糖神经节苷脂组预先在培养液中加入5 mg/L单唾液酸四己糖神经节苷脂。采用RT-PCR及细胞免疫组织化学观察6,24,48 h少突胶质细胞Nogo-A mRNA及其蛋白质的表达。
结果与结论:一氧化碳组6,24及48 h各间点Nogo-A mRNA积分吸光度比值、Nogo-A蛋白质表达的累计吸光度值均显著高于对照组(P < 0.05);一氧化碳处理后24 h,单唾液酸四己糖神经节苷脂组Nogo-A mRNA积分吸光度比值、蛋白质表达的累计吸光度值均显著高于对照组(P < 0.05),但低于一氧化碳组(P < 0.05);Nogo-A mRNA水平与蛋白质表达具有线性相关性(r = 0.95)。提示一氧化碳本身可使少突胶质细胞进入活跃的功能状态,提高Nogo-A的转录和翻译水平;Nogo-A蛋白质表达的增加为其mRNA水平水平提高所致;单唾液酸四己糖神经节苷脂对神经细胞急性一氧化碳损伤的保护作用与抑制少突胶质细胞Nogo-A表达有关。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

关键词: 干细胞, 培养, 神经节苷脂, 少突胶质细胞, 一氧化碳, Nogo-A, 迟发性脑病

Abstract:

BACKGROUND: Nogo-A protein is speculated to have close relationship to delayed encephalopathy after carbon monoxide poisoning because it is a kind of neurite growth inhibitor expressing in oligodendrocytes. Monosialotetrahexosylganglioside can improve nerve damage after carbon monoxide poisoning, but no reports is concerned about whether the neuroprotective effect of ganglioside is related to Nogo-A protein.
OBJECTIVE: To investigate the protective mechanism of ganglioside on nerve cells after carbon monoxide poisoning from the perspective of Nogo-A in oligodendrocytes.
METHODS: Rat oligodendrocytes cultured in vitro were divided into three groups: control, carbon monoxide and monosialotetrahexosylganglioside groups. Carbon monoxide and monosialotetrahexosylganglioside groups were cultured in an airtight box containing 1% carbon monoxide. 5 mg/L monosialotetrahexosylganglioside was added into the culture medium of monosialotetrahexosylganglioside group in advance. The expression of Nogo-A mRNA and protein at 6, 24, 48 hours were detected by RT-PCR and immunohistochemistry method, respectively.
RESULTS AND CONCLUSION: The integrated absorbance values of Nogo-A mRNA and cumulative  
absorbance values of Nogo-A protein in the carbon monoxide group at 6, 24 and 48 hours were significantly higher than those in the control group (P < 0.05). At 24 hours after carbon monoxide treatment, the integrated absorbance value and cumulative absorbance value of Nogo-A were both higher than those in the control group (P < 0.05), but lower than those in the carbon monoxide group (P < 0.05). The integrated absorbance values of Nogo-A mRNA was significantly associated with the cumulative absorbance values of Nogo-A protein (r=0.95). These findings indicate that carbon monoxide can activate oligodendrocytes, and raise the transcription and translation levels of Nogo-A. The increase expression of Nogo-A protein was due to the high level of Nogo-A mRNA. The protective mechanism of ganglioside on nerve cells after carbon monoxide poisoning is related to inhibition of Nogo-A expression in oligodendrocytes.


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

Key words: Carbon Monoxide Poisoning, Brain Diseases, Oligodendroglia

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