中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (19): 3521-3526.doi: 10.3969/j.issn.2095-4344.2013.19.016

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

糖皮质激素对成体海马神经祖细胞的影响

于秀军,李 奕,台立稳,陈 相   

  1. 河北医科大学第二医院神经内科,神经病学河北省重点实验室,河北省石家庄市 050000
  • 收稿日期:2012-09-15 修回日期:2012-10-18 出版日期:2013-05-07 发布日期:2013-05-07
  • 作者简介:于秀军☆,女,1972年生,河北省石家庄市人,回族,2004年日本信州大学毕业,博士,副主任医师,副教授,主要从事神经干细胞研究。 yuxiujun720309@163.com
  • 基金资助:

    河北省教育厅科学研究计划项目(2009005);河北省卫生厅重点科技研究计划(20100085); 河北省自然科学基金(C2011206075);新华区科学技术研究与发展计划

Glucocorticoid effects on adult hippocampal neural progenitor cells

Yu Xiu-jun, Li Yi, Tai Li-wen, Chen Xiang   

  1. Department of Neurology, Key Laboratory of Neurology of Hebei Province, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China
  • Received:2012-09-15 Revised:2012-10-18 Online:2013-05-07 Published:2013-05-07
  • About author:Yu Xiu-jun☆, M.D., Associate chief physician, Associate professor, Department of Neurology, Key Laboratory of Neurology of Hebei Province, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China yuxiujun720309@163.com
  • Supported by:

    Scientific Research Planning Project of the Hebei Education Department, No. 2009005*; Key Scientific Research Planning of Health Department, No. 20100085*; Natural Science Foundation of Hebei Province, No. C2011206075*; Science and Technology Research Development Program of Xinhua District*

摘要:

背景:体内研究显示,高浓度糖皮质激素可抑制大鼠内源性神经前体细胞增殖。而神经胶质抗原2蛋白聚糖阳性神经祖细胞(NG2细胞)是成熟中枢神经系统中最大的增殖细胞群体,具有多分化潜能。
目的:观察糖皮质激素对体外培养的成熟大鼠海马由来的NG2细胞生存和增殖的影响。
方法:原代及传代培养成年大鼠海马NG2细胞,以0,0.1,1,10,100 μmol浓度糖皮质激素类药物地塞米松干预48 h后,采用乳酸脱氢酶分析法测定细胞活性,原位缺口末端标记技术(即TUNEL法)观察细胞凋亡情况,5’-溴脱氧尿嘧啶核苷掺入法鉴定细胞增殖状况。
结果与结论:1,10,100 μmol浓度地塞米松干预明显减少NG2细胞数,并显著增加TUNEL阳性细胞率,明显减少BrdU阳性细胞率。结果可见高浓度糖皮质激素能抑制NG2细胞分裂增殖,并诱导细胞凋亡,从而明显减少NG2细胞数。

关键词: 干细胞, 干细胞培养与分化, 糖皮质激素, 神经胶质抗原2, 神经祖细胞, 增殖, 凋亡, 应激, 地塞米松, 海马, 原代培养, 神经发生, 省级基金

Abstract:

BACKGROUND: In vivo studies have shown that the high concentration of glucocorticoids can inhibit the proliferation of rat endogenous neural precursor cells. Neuron-glia antigen 2 proteoglycan-positive neural progenitor cells are the largest proliferating cell population in the mature central nervous system, which are pluripotent cells.
OBJECTIVE: To investigate the effects of glucocorticoid on the survival and proliferation of the neuron-glia antigen 2 proteoglycan-positive neural progenitor cells from in vitro cultured adult rat hippocampus.
METHODS: Neuron-glia antigen 2 proteoglycan-positive neural progenitor cells were primary cultured and sub-cultured. The passage 1 cells were treated with dexamethasone with the concentrations of 0, 0.1, 1, 10
and 100 μmol for 48 hours, and then the cell activities were determined by lactate dehydrogenase assay, the apoptosis was detected by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling assay, and the proliferation of the cells was identified by 5'-bromodeoxyuridine incorporation method.
RESULTS AND CONCLUSION: Dexamethasone with the concentrations of 1, 10 and 100 μmol could decrease the number of the neuron-glia antigen 2 proteoglycan-positive neural progenitor cells, increase the number of terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling positive cells, and significantly reduce the number of BrdU positive cells. High concentration of glucocorticoid can decrease the number of the neuron-glia antigen 2 proteoglycan-positive neural progenitor cells by inhibiting the proliferation and inducing the apoptosis.

Key words: stem cells, stem cell culture and proliferation, glucocorticoid, neuron-glia antigen 2, neural progenitor cells, proliferation, apoptosis, stress, dexamethasone, hippocampus, primary culture, neurogenesis, provincial grants-supported paper

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