吉林大学学报(医学版) ›› 2013, Vol. 39 ›› Issue (2): 213-217.doi: 10.7694/jldxyxb20130205

• 基础研究 • 上一篇    下一篇

碲化镉量子点对大鼠骨髓间充质干细胞增殖与成骨分化潜能的影响

周煜博1,郭丽1,孟春阳1, 李鹏1, 卢日峰1,杨小玉2, 尹 飞3   

  1. 1.吉林大学公共卫生学院毒理学教研室,吉林 长春130021;2.吉林大学中日联谊医院骨科,吉林 长春 130033;3.吉林大学第一医院脊柱外科,吉林 长春 130021)
  • 收稿日期:2012-12-26 出版日期:2013-03-28 发布日期:2013-03-28
  • 通讯作者: 尹 飞 E-mail:(Tel:0431-88782854,E-mail:yinfei999@yahoo.com.cn)
  • 作者简介:周煜博(1986-),男,吉林省长春市人,在读医学硕士,主要从事干细胞的性质和应用方面的研究。
  • 基金资助:

    国家自然科学基金资助课题(30972153/C180103);吉林省卫生厅医学科研基金资助课题(2009Z044)

Effect of CdTe QDs on proliferation and osteogenesis of rat bone marrow mesenchymal stem cells

ZHOU Yu-bo1,GUO Li1,MENG Chun-yang1,LI Peng1,LU Ri-feng1,YANG Xiao-yu2,YIN Fei3   


  1. (1.Department of Toxicology,School of Public Health,Jilin University,Changchun 130021,China; 2. Department of Orthopedics,China-Japan Union Hospital,Jilin University,Changchun 130033,China;3. Department  of Spine Surgery,First Hospital,Jilin University,Changchun 130021,China;)
  • Received:2012-12-26 Online:2013-03-28 Published:2013-03-28

摘要: 目的:探讨碲化镉量子点(CdTe QDs)对大鼠骨髓间充质干细胞(BMSCs)增殖与成骨细胞分化潜能的影响,阐明CdTe QDs的体外毒性,并为CdTe QDs 作为BMSCs体外活细胞标记应用提供实验依据。 方法:荧光光谱法检测CdTe QDs 在DMEM/F-12培养液中的分散情况。大鼠原代培养BMSCs,经不同浓度CdTe QDs(0、0.195 3、0.390 6、0.781 3、1.562 5、3.125 0、6.250 0、12.500 0、25.000 0和50.000 0 nmol·L-1)作用24 h后,MTT法检测CdTe QDs
对BMSCs增殖的影响。体外地塞米松、甘油磷酸钠和维生素C诱导BMSCs向成骨细胞分化茜素红染色显示钙结节。计算半数增殖抑制浓度(IP50)和成骨半数分化抑制浓度(ID50)。结果:荧光光谱法检测,CdTe QDs 在DMEM/F-12培养液中分散良好,未发生聚合。随着BMSCs暴露于CdTe QDs的时间延长,其细胞的生长逐渐减慢,暴露24、48和72 h的回归系数分别为-23.96,-29.61和-24.30(P<0.05), IP50分别为7.25、1.63和0.67 nmol?L-1。随着CdTe QDs浓度的增加,BMSCs分化成的成骨细胞逐渐减少,暴露48 h的成骨分化回归系数为-56.15(P<0.05), ID50为0.0412 nmol·L-1,增殖分化抑制比(IP50/ ID50)= 39.56。结论:在一定浓度范围内(0.195 3、0.390 6、0.781 3、1.562 5、3.125 0、6.250 0、12.500 0、25.000 0和50.000 0 nmol?L-1),CdTe QDs抑制BMSCs的增殖;在一定浓度范围内(0.012 2、0.024 4、0.048 8、0.097 6和0.195 3 nmol·L-1,CdTe QDs抑制BMSCs向成骨细胞的分化。在使用CdTe QDs作为活细胞标记物时,需要考虑其对细胞增殖及分化的影响。

关键词: 碲化镉量子点, 骨髓间充质干细胞, 细胞增殖, 细胞分化

Abstract: To explore the effect of cadmium telluride quantum dots (CdTe QDs) on the proliferation and osteogenesis differentiation of rat bone marrow mesenchymal stem cells (BMSCs),and to illustrate the toxicity of CdTe QDs in vitro,and to provide experimental evidence for application of CdTe QDs for living cell labeling marker.Methods Photoluminescence detector was used to detect photoluminescence emission spectra of the CdTe QDs in order to determine the dispersion of CdTe QDs in DMEM/F-12 medium.The rat BMSCs were cultured,and MTT assay was performed to examine the effects of different concerntrations (0,0.195 3,0.390 6,0.781 3,1.562 5,3.125 0,6.250 0,12.500 0,25.000 0,and 50.000 0 nmol·L-1) of CdTe QDs on the proliferation of BMSCs;in vitro hexadecadrol,sodium glycerophosphate and vitamin C were used to induce osteogenesis differentiation. Alizarin red staining was used to display calcium nodus.The concentration inducing 50% of inhibition of proliferation (IP50) and the concentration inducing 50% of inhibition of differentiation (ID50) were calculated.Results Photoluminescence emission spectra showed that CdTe QDs were well dispersed in DMED-F/12 medium without segregation.The longer the exposure time went,the less the cell viability remained.The regression coefficients of 24,48 and 72 h exposure were separately -23.96,-29.61 and -24.30  (P<0.05);and the IP50 of each time was separately 7.25,1.63, and 0.67 nmol·L-1.And the higher the exposure dose was,the lower the osteogenesis differentiation rate was.The regression coefficient of 48 h exposure was -56.15 (P<0.05),and the ID50 was 0.041 2 nmol·L-1,and the ratio of IP50/ ID50 was 39.56.Conclusion At a certain concentration range (0.012 2-50.000 0 nmol·L-1),CdTe QDs could inhibit the proliferation and osteogenesis differentiation of BMSCs.When CdTe QDs are used as living cell labeling marker,their influence in cell proliferation and differentiation should be considered.

Key words: cadmium telluride quantumdots, bone marrow mesenchymal stem cells, cell proliferation, cell differentiation

中图分类号: 

  • R329