中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (52): 8450-8455.doi: 10.3969/j.issn.2095-4344.2014.52.016

• 材料力学及表面改性 material mechanics and surface modification • 上一篇    下一篇

改性丝素蛋白支架与生长因子基因修饰脂肪间充质干细胞构建组织工程脂肪

亢 婷1,王 刚2,刘 毅2,刘刚强2   

  1. 1兰州大学第二临床医学院,甘肃省兰州市 730061;2解放军兰州军区兰州总医院全军烧伤整形外科中心,甘肃省兰州市 730050
  • 修回日期:2014-11-18 出版日期:2014-12-17 发布日期:2014-12-17
  • 通讯作者: 刘毅,解放军兰州军区兰州总医院全军烧伤整形外科中心,甘肃省兰州市 730050
  • 作者简介:亢婷,女,1988年生,河南省新乡市人,汉族,在读硕士,主要从事脂肪组织工程研究。
  • 基金资助:

    全军医学科研“十二五”重点项目(BWS11C061)

In vitro construction of tissue engineered adipose using vascular endothelial growth factor 165 gene-modified human adipose derived stem cells with chitosan-surface modified silk fibroin scaffolds

Kang Ting1, Wang Gang2, Liu Yi2, Liu Gang-qiang2   

  1. 1Lanzhou University Second Hospital, Lanzhou 730061, Gansu Province, China; 2Military Institute of Burns and Plastic Surgery, Lanzhou General Hospital of Lanzhou Military Region, Lanzhou 730050, Gansu Province, China
  • Revised:2014-11-18 Online:2014-12-17 Published:2014-12-17
  • Contact: Liu Yi, Military Institute of Burns and Plastic Surgery, Lanzhou General Hospital of Lanzhou Military Region, Lanzhou 730050, Gansu Province, China
  • About author:Kang Ting, Studying for master’s degree, Lanzhou University Second Hospital, Lanzhou 730061, Gansu Province, China
  • Supported by:

    the Military Medical Research Program during the Twelfth Five-Year Plan Period, No. BWS11C061  

摘要:

背景:构建工程化的脂肪组织,适宜的种子细胞和性能优良的支架材料缺一不可。

目的:探讨携带重组人血管内皮细胞生长因子165基因的慢病毒载体感染人脂肪间充质干细胞后,与壳聚糖修饰的丝素蛋白支架材料体外构建组织工程脂肪的可行性。
方法:选取生长良好的第3代人脂肪间充质干细胞,用携带重组人血管内皮细胞生长因子165基因的慢病毒进行感染。将慢病毒感染与未感染的第3代人脂肪间充质干细胞成脂诱导14 d,油红O染色观察细胞的成脂能力;将慢病毒感染和未感染的第3代人脂肪间充质干细胞分别接种于壳聚糖修饰丝素蛋白支架材料上,MTT法检测细胞增殖能力;成脂诱导14 d后进行油红O染色,RT-PCR检测成脂特异性基因过氧化物酶增殖物活化受体γ2的表达。
结果与结论:成脂诱导14 d后,慢病毒感染与未感染的第3代人脂肪间充质干细胞均可见成熟脂肪细胞,组间差异不明显。慢病毒感染和未感染的第3代人脂肪间充质干细胞在改性丝素蛋白支架的生长曲线相近;成脂诱导后,油红O染色及RT-PCR均显示生成大量成熟脂肪细胞。表明携带重组人血管内皮细胞生长因子基因的慢病毒感染人脂肪间充质干细胞后,不影响其生长及成脂能力,与壳聚糖修饰的丝素蛋白支架材料可成功构建组织工程化脂肪。

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 材料相容性, 人脂肪间充质干细胞, 慢病毒载体, 血管内皮细胞生长因子165, 改性丝素蛋白

Abstract:

BACKGROUND: To construct tissue-engineered adipose tissues, suitable seed cells and excellent performance of scaffold materials are indispensable.

OBJECTIVE: To investigate the feasibility of constructing tissue-engineered adipose in vitro utilizing vascular endothelial growth factor 165 (VEGF165) gene-modified human adipose derived stem cells with chitosan-modified silk fibroin scaffolds. 
METHODS: Passage 3 human adipose derived stem cells growing well were selected, and transfected with or without lentivirus-VEGF165-EGFP. To test the impact of lentivirus infection on adipogenic capability of human adipose derived stem cells, oil red O staining was performed after adipogenic induction for 14 days. To evaluate the proliferation and adipogenic capability of lentivirus infected human adipose derived stem cells on the chitosan-modified silk fibroin scaffolds, lentivirus infected and uninfected passage 3 human adipose derived stem cells were seeded on modified silk fibroin scaffolds respectively, and MTT tests were used to evaluate cell proliferation on the scaffolds. After adipogenic induction for 14 days, RT-PCR was performed to detect the expression of peroxisome proliferator-activated receptor γ-2. Besides, oil red O staining was adopted to illustrate the mature adipocytes.
RESULTS AND CONCLUSION: After adipogenic induction for 14 days, oil red O staining results showed mature adipocytes existed in lentivirus infected and uninfected passage 3 human adipose derived stem cells, and there was no statistical difference between lentivirus infected and uninfected cells. The proliferation curves of lentivirus infected and uninfected cells on the scaffolds showed no significant difference. After adipogenic induction for 14 days, oil red O staining and RT-PCR results could demonstrate that human adipose derived stem cells could be induced to mature adipocytes. These findings indicate that after infected by lentivirus-VEGF165-EGFP, the adipogenic differentiation and growth of human adipose derived stem cells cannot be affected. Lentivirus-infected human adipose derived stem cells can be combined with the chitosan-modified silk fibroin scaffolds to construct tissue-engineered adipose tissues successfully.

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words:  tissue engineering, mesenchymal stem cells, entivirus infections, vascular endothelial growth factors

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