中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (21): 3304-3309.doi: 10.3969/j.issn.2095-4344.0522

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

脂肪间充质干细胞混合成骨细胞与羟基磷灰石/壳聚糖/聚乳酸复合后的体内异位成骨效应

田学涛1,王显勋2,王小伟2   

  1. 1江汉大学附属医院(武汉市第六医院)创伤科,湖北省武汉市 430015;2湖北省第三人民医院骨科,湖北省武汉市 430033
  • 修回日期:2018-03-04 出版日期:2018-07-28 发布日期:2018-07-28
  • 通讯作者: 王小伟,硕士,主治医师,湖北省第三人民医院骨科,湖北省武汉市 430033
  • 作者简介:田学涛,男,1978年生,湖北省天门市人,汉族,2014年华中科技大学毕业,硕士,副主任医师,主要从事创伤骨科方面的研究。
  • 基金资助:

    湖北省卫生计生科研项目(WJ2015MB128)

In vivo ectopic osteogenesis of adipose-derived mesenchymal stem cells/osteoblasts combined with hydroxyapatite/chitosan/polylactic acid

Tian Xue-tao1, Wang Xian-xun2, Wang Xiao-wei2   

  1. 1Department of Traumatology, Affiliated Hospital of Jianghan University (Wuhan No. 6 Hospital), Wuhan 430015, Hubei Province, China; 2Department of Orthopedics, the Third People’s Hospital of Hubei Province, Wuhan 430033, Hubei Province, China
  • Revised:2018-03-04 Online:2018-07-28 Published:2018-07-28
  • Contact: Wang Xiao-wei, Master, Attending physician, Department of Orthopedics, the Third People’s Hospital of Hubei Province, Wuhan 430033, Hubei Province, China
  • About author:Tian Xue-tao, Master, Associate chief physician, Department of Traumatology, Affiliated Hospital of Jianghan University (Wuhan No. 6 Hospital), Wuhan 430015, Hubei Province, China
  • Supported by:

    the Research Project for Health and Family Plans in Hubei Province, No. WJ2015MB128

摘要:

文章快速阅读:

文题释义:
异位成骨动物模型:
近年来随着骨组织工程学的迅速发展,应用骨组织工程技术治疗骨缺损为当前发展趋势,异位成骨动物模型相对于原位成骨可以减少实验中影响成骨的变量,能评估成骨诱导材料的效果。异位成骨动物模型的建立方法从最早的皮下和肌肉小袋植入模型,到后来的肾被膜以及腹腔内植入模型,各有特点,选择一个合适的模型对实验的成功有着密切的关系。
羟基磷灰石/壳聚糖/聚乳酸:是一种由羟基磷灰石、壳聚糖和聚乳酸通过原位生成法和溶液共混法制备的三元纳米复合支架材料,具有良好的生物相容性、优良的机械性能、有效的表面活性与降解速率可调控等特性。此外,还具有骨传导性、骨诱导性并能与骨组织发生骨性结合,是一种新兴的组织工程支架。

 

摘要
背景:
成骨细胞缺乏是骨组织工程面临的关键问题,而间充质干细胞联合成骨细胞移植能够获得理想效果。
目的:观察脂肪间充质干细胞与成骨细胞复合羟基磷灰石/壳聚糖/聚乳酸支架材料在体内的异位成骨效应。
方法:酶消化法和贴壁法分离原代脂肪间充质干细胞、成骨细胞,并进行鉴定。取成骨细胞、脂肪间充质干细胞、成骨细胞+脂肪间充质干细胞混合细胞(比例为1︰1),分别复合羟基磷灰石/壳聚糖/聚乳酸骨修复材料,体外复合培养48 h后,植入SD大鼠背部皮下,作为实验组,以单纯材料植入作为对照组。术后8周取出标本,进行大体观察、组织学观察并计算新骨生成率。
结果与结论:①脂肪间充质干细胞经成脂、成软骨、成骨诱导后,油红O染色、甲苯胺蓝染色和茜素红染色均为阳性;流式细胞仪检测脂肪间充质干细胞中CD147、CD90、CD105、CD44呈阳性表达(> 80%),而CD117、CD34、CD31、CD45则呈阴性表达(< 5%);②第3代成骨细胞茜素红染色、碱性磷酸酶染色均为阳性;③植入8周后大体观察可见材料中有软组织长入,难以分离;④植入8周后组织学观察可见各组均有新骨形成,与其他材料组比较,脂肪间充质干细胞+成骨细胞+羟基磷灰石/壳聚糖/聚乳酸组成骨分数最高,差异有显著性意义(P < 0.05);⑤结果表明,脂肪间充质干细胞可促进成骨细胞复合羟基磷灰石/壳聚糖/聚乳酸支架材料的异位成骨。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0002-0957-0742(田学涛)

关键词: 成骨细胞, 脂肪间充质干细胞, 羟基磷灰石/壳聚糖/聚乳酸, 干细胞

Abstract:

BACKGROUND: Osteoblast deficiency is a key problem in bone tissue engineering, and transplantation of mesenchymal stem cells combined with osteoblast can achieve ideal results.
OBJECTIVE: To investigate the in vivo ectopic osteogenesis of adipose-derived mesenchymal stem cells (ADSCs) and osteoblasts (OB) combined with hydroxyapatite (HA)/chitosan (CS)/poly(L-latic acid) (PLLA).
METHODS: ADSCs and OB were obtained by adherent method and enzymatic digestion method. ADSCs, OB and the mixture of ADSCs and OB (at a mixture ratio of 1:1) were cultured with HA/CS/PLLA, respectively. After 48 hours of in vitro culture, cell-scaffold complexes were subcutaneously implanted into the back of Sprague-Dawley rats in corresponding groups, and HA/CS/PLLA without cells was implanted as control group. The rats in each group were killed at 8 weeks postoperatively. The macroscopic and histopathological observations were performed to assess the ectopic osteogenesis potential.
RESULTS AND CONCLUSION: (1) After adipogenic, chondrogenic and osteogenic induction, ADSCs were positive for oil red O, toluidine blue and alizarin red staining. Results from flow cytometry showed that ADSCs were positive for CD147, CD90, CD105 and CD44 with the rate of positivity > 80%, but negative for CD117, CD34, CD131, CD45 with the rate of positivity < 5%. (2) Passage 3 OB were positive for both alizarin red staining and alkaline phosphatase staining. (3) At 8 weeks after implantation, soft tissues grew into the complexes under gross observation. (4) At 8 weeks after implantation, ectopic bone formation was visible in each group. The bone formation was more visible in the ADSCs-OB/HA/CS/PLLA group than the other groups with significant differences (P < 0.05). To conclude, ADSCs can promote the ectopic bone formation of OB in vivo in combination with HA/CS/PLLA scaffold.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Osteoblasts, Adipose Tissue, Mesenchymal Stem Cells, Calcium Phosphates, Tissue Engineering

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