中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (18): 2828-2833.doi: 10.3969/j.issn.2095-4344.2017.18.007

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

低频脉冲电磁场在三维支架下对人脂肪源干细胞增殖和成骨分化的影响

陈宇雄1,陈贤哲1,倪梦杉1,郭文杰1,田  京2
  

  1. 1南方医科大学第二临床医学院,广东省广州市  510282; 2南方医科大学珠江医院骨科中心,广东省广州市  510282
  • 收稿日期:2017-04-01 出版日期:2017-06-28 发布日期:2017-07-07
  • 通讯作者: Tian Jing, Professor, Associate chief physician, Master’s supervisor, Orthopedics Center, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • 作者简介:陈宇雄,男,1994年生,广东省江门市人,南方医科大学本科在读。
  • 基金资助:

    广东省大学生科技创新培育专项资金(pdjh2016b0104);广东省科技计划项目(2013B021800312)

Effect of low-frequency pulsed electromagnetic fields on proliferation and osteogenic ability of human adipose-derived stem cells in a three-dimensional scaffold

Chen Yu-xiong1, Chen Xian-zhe1, Ni Meng-shan1, Guo Wen-jie1, Tian Jing2
  

  1. 1The Second Clinical Medical College, Southern Medical University, Guangzhou 510282, Guangdong Province, China; 2Orthopedics Center, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Received:2017-04-01 Online:2017-06-28 Published:2017-07-07
  • Contact: 田京,教授,副主任医师,硕士生导师,南方医科大学附属珠江医院骨科中心,广东省广州市 510282
  • About author:Chen Yu-xiong, the Second Clinical Medical College, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Supported by:

    the Scientific Innovative Culture Fund for the Undergraduate in Guangdong Province, No. pdjh2016b0104; the Scientific Research Plan of Guangdong Province, No. 2013B021800312

摘要:

文章快速阅读:

 

文题释义:
脉冲电磁场的生物效应
:具有一定的场强、频率、时间依赖性,但并非简单的线性关系,另外间充质干细胞对脉冲电磁场不同场强和频率的反应具有“窗口效应”。Cheng 等用1.4-2.2 mT范围场强、50 Hz正弦电磁场暴露大鼠骨髓间充质干细胞,发现1.8 mT具有最强的诱导成骨分化作用。Luo等通过1.1 mT、不同频率的脉冲电磁场诱导人类骨髓间充质干细胞,发现50 Hz诱导其成骨分化效果最显著。Jansen 等认为脉冲电磁场刺激人骨髓间充质干细胞成骨分化具有时间依赖效应,在体外干预间充质干细胞第9,14天骨形态发生蛋白2、骨保护素等多项指标才有所变化。Yang等对SD大鼠的间充质干细胞也持续观察到21 d,才观察到显著的成骨效应,而Tsai等实验中对人骨髓间充质干细胞的照射时间长达28 d才发现成骨活动的峰值。尽管各个实验的结果存在一定的差异性,但都证实了脉冲电磁场的促增殖和成骨分化作用。

背景:目前已有较多实验研究证实低频脉冲电磁场在二维支架下促进多种干细胞向成骨细胞分化,但鲜有研究磁场在三维支架下对干细胞的增殖及成骨分化的影响。
目的:探讨在聚已内酯3D培养支架环境下,外加低频脉冲电磁场对人脂肪源干细胞增殖及成骨分化的影响。
方法:将第3代人脂肪源干细胞接种于聚已内酯3D培养支架上,分2组培养,实验组给予50 Hz、1 mT的低频脉冲电磁场干预,2 h/d,连续干预14 d;对照组不给于低频脉冲电磁场干预。培养7 d后,Live/Dead染色观察细胞存活情况;培养1,3,5,7 d后,MTT法检测细胞增殖;培养7,14 d,碱性磷酸酶染色及qRT-PCR检测细胞成骨分化水平。
结果与结论:①Live/Dead染色:人脂肪源干细胞已长入到支架材料的空隙结构内部,在材料中可保持较高的活性;②细胞增殖:随着培养时间的延长,两组细胞A值均逐渐升高,实验组培养1,3 d的细胞A值高于对照组(P < 0.05);③碱性磷酸酶染色:实验组培养7,14 d的碱性磷酸酶阳性染色强于对照组;④qRT-PCR检测:培养7 d时,实验组碱性磷酸酶、Ⅰ型胶原基因表达量高于对照组(P < 0.01);培养14 d时,实验组骨桥蛋白、Runt相关转录因子2、碱性磷酸酶及Ⅰ型胶原的表达量均明显高于对照组(P < 0.05);⑤结果表明:在聚已内酯3D培养支架环境下,外加低频脉冲电磁场可促进人脂肪源干细胞的增殖及成骨分化。

关键词: 生物材料, 骨生物材料, 聚已内酯3D培养支架, 低频脉冲电磁场, 人脂肪源干细胞, 增殖, 成骨分化

Abstract:

BACKGROUND: Nowadays increasing experimental findings have proved that the low-frequency pulsed electromagnetic fields (LPEMF) can induce osteogenic differentiation of a variety of stem cells in the two-dimensional scaffold. However, little is reported on the LPEMF effect on the proliferation and osteogenic differentiation of stem cells in the three-dimensional scaffold.
OBJECTIVE: To investigate the effect of LPEMF on the proliferation and osteogenic differentiation of human adipose-derived stem cells (hASCs) in the 3D Insert-PCL scaffold.
METHODS: Passage 3 hASCs were directly cultured in the 3D Insert-PCL scaffolds followed by LPEMF (50 Hz, 1 mT) exposure, 2 hours per day, for continuous 14 days (experimental group) or no intervention (control group). After 7 days of culture, Live/Dead staining was used to observe cell survival. After 1, 3, 5, 7 days of culture, MTT assay was used to detect cell proliferation. After 7 and 14 days of culture, the osteogenic differentiation of hASCs was assessed through the alkaline phosphatase (ALP) staining and qRT-PCR.
RESULTS AND CONCLUSION: Live/dead cell staining proved that the hASCs had a good growth in the 3D Insert-PCL scaffolds as well as a high survival rate. The absorbance values of hASCs in the two groups were increased gradually with time, and the absorbance value in the experimental group was significantly higher than that in the control group at 1 and 3 days after culture (P < 0.05). The ALP activity in the experimental group was stronger than that in the control group at 7 and 14 days after culture. qRT-PCR findings showed that at 7 days after culture, the mRNA levels of ALP and type I collagen were significantly higher in the experimental group than the control group (P < 0.01), while at 14 days after culture, the mRNA levels of osteopontin, Runt-related transcription factor, ALP and type I collagen were significantly higher in the experimental group than the control group (P < 0.05). To conclude, the LPEMF exposure can promote the proliferation and osteogenic differentiation of hASCs cultured on the the 3D Insert-PCL scaffold.

Key words: Electromagnetic Fields, Stem Cells, Cell Proliferation, Tissue Engineering

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