南方医科大学学报 ›› 2004, Vol. 24 ›› Issue (04): 367-370.

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兔骨髓基质细胞诱导分化成神经元样细胞的研究

陈剑荣, 徐如祥, 姜晓丹, 徐强, 蔡颖谦, 邹雨汐, 丁涟沭   

  1. 第一军医大学珠江医院神经外科, 广东, 广州, 510280
  • 出版日期:2004-04-20 发布日期:2004-04-20
  • 基金资助:
    收稿日期:2003-10-24。
    基金项目:国家自然科学基金(30270491);全军医学科研“十五”计划重大课题(01Z054);广东省自然科学基金项目[粤科基办(2000)25];广东省科技计划项目[粤财企2001(367)]
    作者简介:陈剑荣(1969-),女,广东茂名人,现为第一军医大学在读硕士研究生,电话:020-33580416,E-mail:www-usa@163.com

Induced differentiation of rabbit bone marrow stromal cells into neuron-like cells

CHEN Jian-rong, XU Ru-xiang, JIANG Xiao-dan, XU Qiang, CAI Ying-qian, ZOU Yu-xi, DING Lian-shu   

  1. 第一军医大学珠江医院神经外科, 广东, 广州, 510280
  • Online:2004-04-20 Published:2004-04-20

摘要: 目的 检测由骨髓基质细胞诱导分化而成的神经元样细胞能否分泌氨基酸类神经生物活性物质成分,从而推断是否具有神经元的生化特征。方法 无菌条件下抽取新西兰大白兔骨髓,梯度密度离心分离获取兔骨髓基质细胞(BMSCs),在神经干细胞培养基及细胞因子0.5 μg/ml维甲酸(RA)、20 ng/ml胶质源性神经营养因子(GDNF)于体外诱导分化为神经干细胞及神经元样细胞,采用免疫细胞化学方法进行鉴定,并应用高效液相色谱法(HPLC)检测其氨基酸类生物活性物质的含量。结果 BMSCs培养10 d可见细胞大而圆,免疫细胞化学检测Nestin抗原阳性;培养20 d可见具有长突起的神经元样细胞形成,神经元特异烯醇化酶(NSE)免疫细胞化学检查阳性,高效液相检测骨髓源性神经元样细胞含有高浓度的天冬氨基酸(Asp)、谷氨酸(Glu)、甘氨酸(Gly)、丙氨酸(Ala)。方差分析显示:随着BMSC培养天数的增加,其所含的Asp、Glu浓度也渐增加,RA+GDNF组所含Asp生物活性物质与其余各组比较有显著性差异(P<0.01)。结论 兔BMSCs在体外条件下可以增殖分化,增殖细胞表达Nestin,分化的细胞则可表达NSE特异性抗原,并含有高浓度的兴奋性和抑制性氨基酸类神经递质成分;RA和GDNF作为BMSCs的诱导剂,在BMSCs向神经干细胞分化中起有重要的促进作用。

Abstract: Objective To study whether the neuron-like cells derived from bone marrow stromal cells (BMSCs) may excrete amino acids with neurobiological activities and possess the biochemical characteristics of neurons. Method Under sterile condition, BMSCs from New Zealand rabbits were purified by gradient density centrifugation, and were induced to differentiate into neural stem cells and neuronal-like cells in the culture medium for neural stem cells containing retinoic acid (RA, 0.5 μg/ml) and glial-derived neurotrophic factor (GDNF, 20 ng/ml). The differentiated cells were then examined with immunocytochemical method and high-performance liquid chromatograpy (HPLC). Results The round and enlarged BMSCs on day 10 of cell culture were positive for nestin, and on day 20, the cells with RA+GDNF stimulation differentiated into neuron-like cells with long protrusions and presented neuron-specific enolase (NSE) antigen. HPLC identified high levels of amino acids like Asp, Glu, Gly and Ala in the differentiated cells (P<0.01). Conclusions Rabbit BMSCs may proliferate in vitro as from nestin-positive cells and differentiate into NSE-positive cells containing high levels of excitatory and inhibitory amino acid neurotransmitters. RA and GDNF are important promoters for in vitro differentiation of the BMSCs toward neural stem cells.

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